CN115243420A - Lighting device and color temperature adjusting method thereof - Google Patents

Abstract

The invention discloses a lighting device and a color temperature adjusting method thereof.A color temperature adjusting instruction is received and used for indicating to increase or decrease the color temperature of the lighting device; and applying corresponding power supply signals to the plurality of signal terminals according to the color temperature adjusting instruction so as to adjust the color temperature of the lighting device. Through setting up two at least organic light emitting device that emit different colored light and arranging to on being connected to signal terminal through the signal line with organic light emitting device, thereby through the power signal on the regulation signal terminal, can adjust the luminance that corresponding organic light emitting device was listed as, through the luminance ratio of adjusting different colored light, reach the effect of adjusting the colour temperature.

Description

A kind of lighting device and its color temperature adjustment method

technical field

The invention relates to the field of lighting, in particular to a lighting device and a color temperature adjustment method thereof.

Background technique

Organic Light Emitting Diode (OLED) has the characteristics of low operating voltage, low power consumption, fast response, high luminous efficiency and can be used for flexible substrates, etc. It is widely used in electronic products, commerce, transportation, industrial control, etc. in the field.

In an OLED device, the electrons in the cathode and the holes in the anode move to the light-emitting layer of the device under the driving of an applied driving voltage, and the electrons and holes accumulate at the interface of the light-emitting layer and recombine to generate excitons, which makes the light-emitting layer in the light-emitting layer. The organic molecules are activated, and the luminescence of the device is realized during the process of exciton de-excitation. When OLED is used for lighting, it is a thin planar distributed light source. Compared with Light Emitting Diode (LED), which is the most widely used lighting device at present, it has high efficiency, low energy consumption, long durability, Unique advantages such as no glare and no heat dissipation.

However, the current OLED lighting circuit corresponds to a monochromatic lighting structure, and the color temperature is not adjustable, which is not suitable for diverse scenes in life and work.

SUMMARY OF THE INVENTION

The invention provides a lighting device and a color temperature adjustment method thereof, which are used to adjust the color temperature of the OLED lighting device.

In a first aspect, the present invention provides a lighting device, comprising:

A plurality of organic light emitting devices are arranged in an array along a first direction and a second direction to form a plurality of organic light emitting diode columns extending along the second direction, and the first direction and the second direction intersect; The colors of the emitted light of the organic light-emitting device columns are the same, and the colors of the emitted light of at least two of the organic light-emitting device columns are different;

a plurality of signal terminals, located on one side of all the organic light-emitting devices in the second direction; the signal terminals are used for providing power signals;

A plurality of signal lines extend along the second direction and are arranged along the first direction; one of the signal lines is connected to one of the organic light-emitting device columns; and one of the signal terminals is connected to at least one of the signal lines.

In some embodiments of the present invention, it also includes:

a switch circuit, located between each of the signal lines and each of the signal terminals; the switch circuit includes a plurality of switch transistors, one of the switch transistors is connected to one of the signal lines, and one of the signal terminals is connected to at least one of the signal lines the switch transistor; the switch transistor includes a control electrode, a first electrode and a second electrode;

a switch signal line, the control electrode of each switch transistor is connected to the switch signal line, the first electrode of the switch transistor is connected to the corresponding signal line, and the second electrode of the switch transistor is connected to the corresponding signal terminal ; the switch transistor is used to transmit the power signal provided by the signal terminal connected to the second pole to the first pole under the control of the switch signal transmitted by the switch signal line.

In some embodiments of the present invention, the organic light-emitting device column includes: at least one red organic light-emitting device column, at least one green organic light-emitting device column, and at least one blue organic light-emitting device column;

The red organic light emitting device column, the green organic light emitting device column, and the blue organic light emitting device column are arranged in a set order along the first direction.

In some embodiments of the present invention, the signal terminals include: a first signal terminal, a second signal terminal, and a third signal terminal;

Each of the red organic light-emitting device columns is respectively connected to the first signal terminal through a corresponding signal line; each of the green organic light-emitting device columns is respectively connected to the second signal terminal through a corresponding signal line; each of the blue organic light-emitting device columns is respectively connected to the second signal terminal The light emitting device columns are respectively connected to the third signal terminals through corresponding signal lines.

In some embodiments of the present invention, the number of the red organic light emitting device column, the green organic light emitting device column and the blue organic light emitting device column is multiple; the signal terminals include: a plurality of first signal terminals , a plurality of second signal terminals, a plurality of third signal terminals;

One of the first signal terminals is connected to one of the red organic light-emitting device columns through one of the signal lines, one of the second signal terminals is connected to one of the green organic light-emitting device columns through one of the signal lines, and one of the first The three signal terminals are connected to one of the blue organic light emitting device columns through one of the signal lines.

In some embodiments of the present invention, it also includes:

a driving board; the driving board includes a substrate and a circuit located on the substrate; the circuit includes the plurality of signal lines and the plurality of signal terminals; the organic light-emitting device is located on the driving board, electrically connected with the drive board;

The organic light-emitting device includes:

an anode, which is located on the driving board and is electrically connected to the corresponding signal line;

a light-emitting layer, located on the side of the anode away from the driving board;

a cathode, located on the side of the light-emitting layer away from the anode; each of the organic light-emitting devices shares the same cathode;

Each organic light-emitting device in the red organic light-emitting device column is a red organic light-emitting device, each organic light-emitting device in the green organic light-emitting device column is a green organic light-emitting device, and each organic light-emitting device in the blue organic light-emitting device column The light-emitting device is a blue organic light-emitting device;

The material of the light-emitting layer of the red organic light-emitting device, the material of the light-emitting layer of the green organic light-emitting device and the material of the light-emitting layer of the blue organic light-emitting device are all different;

Alternatively, each organic light-emitting device in the red organic light-emitting device column, the blue organic light-emitting device column, and the green organic light-emitting device column is a white organic light-emitting device; all the light-emitting layers of the white organic light-emitting device the same material;

The lighting device also includes:

a color filter layer, located on the light-emitting side of the white organic light-emitting device;

The color filter layer includes: multiple red color filter units, multiple green color filter units, and multiple blue color filter units;

Each of the red color film units, each of the green color film units, and each of the blue color film units is in one-to-one correspondence with each of the white organic light-emitting devices; in the same organic light-emitting device row, the white organic light-emitting devices are in one-to-one correspondence. The color filter units corresponding to the device have the same color.

In a second aspect, the present invention provides a color temperature adjustment method based on any of the above lighting devices, comprising:

receiving a color temperature adjustment instruction; the color temperature adjustment instruction is used to instruct to increase or decrease the color temperature of the lighting device;

A corresponding power signal is applied to the plurality of signal terminals according to the color temperature adjustment instruction, so as to adjust the color temperature of the lighting device.

In some embodiments of the present invention, when the color temperature adjustment instruction is used to instruct to increase the color temperature of the lighting device, the applying a corresponding power signal to the plurality of signal terminals according to the color temperature adjustment instruction includes:

Apply a first power signal to the plurality of signal terminals according to the color temperature adjustment instruction, so as to increase the proportion of blue light in the emitted light of the lighting device, and increase the color temperature of the lighting device;

When the color temperature adjustment instruction is used to instruct to reduce the color temperature of the lighting device, applying the corresponding power signal to the plurality of signal terminals according to the color temperature adjustment instruction includes:

A second power signal is applied to the plurality of signal terminals according to the color temperature adjustment instruction, so as to increase the proportion of red light in the emitted light of the lighting device, and reduce the color temperature of the lighting device.

In some embodiments of the present invention, the signal terminals include: a first signal terminal, a second signal terminal, and a third signal terminal; each of the red organic light emitting device columns is connected to the first signal terminal through a corresponding signal line. a signal terminal; each of the green organic light-emitting device columns is connected to the second signal terminal through a corresponding signal line respectively; each of the blue organic light-emitting device columns is respectively connected to the third signal terminal through a corresponding signal line;

The applying corresponding power signals to the plurality of signal terminals includes:

Respectively adjust the power supply signal applied by the first signal terminal, the second signal terminal and the third signal terminal to adjust the ratio of red light, green light and blue light in the emitted light of the lighting device, and change the The color temperature of the lighting fixture.

In some embodiments of the present invention, the number of the red organic light-emitting device column, the green organic light-emitting device column, and the blue organic light-emitting device column is multiple; adjacent one of the red organic light-emitting device column, One of the green organic light-emitting device columns and one of the blue organic light-emitting device columns constitute an organic light-emitting device group; the signal terminals include: a plurality of first signal terminals, a plurality of second signal terminals, and a plurality of third signal terminals terminals; one of the first signal terminals is connected to one of the red organic light-emitting device columns through one of the signal lines, one of the second signal terminals is connected to one of the green organic light-emitting device columns through one of the signal lines, and one of the second signal terminals is connected to one of the green organic light-emitting device columns through one of the signal lines. the third signal terminal is connected to one of the blue organic light-emitting device columns through one of the signal lines;

The applying corresponding power signals to the plurality of signal terminals includes:

Respectively adjust the power supply signals applied to the first signal terminal, the second signal terminal and the third signal terminal corresponding to each of the organic light-emitting device groups, so as to adjust the output light of each of the organic light-emitting device groups. The ratio of red light, green light and blue light changes the color temperature of each organic light emitting device group, so as to change the color temperature of the mixed light of each organic light emitting device group.

The beneficial effects of the present invention are as follows:

A lighting device and a color temperature adjustment method thereof provided by the present invention include: a plurality of organic light-emitting devices arranged in an array along a first direction and a second direction to form a plurality of organic light-emitting device columns extending along the second direction; The direction intersects with the second direction; the color of the outgoing light of the same organic light-emitting device column is the same, and the color of the outgoing light of at least two organic light-emitting device columns is different; a plurality of signal terminals are located in the second direction of all the organic light-emitting devices. One side is used to provide power signals; a plurality of signal lines extend along the second direction and are arranged along the first direction, one of the signal lines is connected to one organic light emitting device column, and one signal terminal is connected to at least one signal line. By receiving a color temperature adjustment instruction, the color temperature adjustment instruction is used to instruct to increase or decrease the color temperature of the lighting device; according to the color temperature adjustment instruction, a corresponding power signal is applied to a plurality of signal terminals to adjust the color temperature of the lighting device. By arranging at least two organic light-emitting device columns that emit light of different colors, and connecting the organic light-emitting device columns to the signal terminals through signal lines, so as to adjust the power signal on the signal terminals, the corresponding organic light-emitting device columns can emit light. The brightness is adjusted, and the effect of adjusting the color temperature is achieved by adjusting the brightness ratio of different colors of light.

Description of drawings

In order to illustrate the technical solutions of the embodiments of the present invention more clearly, the following briefly introduces the accompanying drawings that need to be used in the embodiments of the present invention. Obviously, the drawings introduced below are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without any creative effort.

1 is a schematic structural diagram of a lighting device in the related art;

FIG. 2 is one of the schematic structural diagrams of the lighting device provided by the embodiment of the present invention;

3 is a cross-sectional view of a lighting device provided by an embodiment of the present invention;

FIG. 4 is the second schematic structural diagram of the lighting device provided by the embodiment of the present invention;

5 is a third schematic structural diagram of a lighting device provided by an embodiment of the present invention;

FIG. 6 is a fourth schematic structural diagram of a lighting device provided by an embodiment of the present invention;

FIG. 7 is a fifth schematic structural diagram of a lighting device provided by an embodiment of the present invention;

FIG. 8 is a sixth schematic structural diagram of a lighting device according to an embodiment of the present invention;

FIG. 9 is a flowchart of a method for adjusting color temperature of a lighting device according to an embodiment of the present invention.

Detailed ways

In order to make the above objects, features and advantages of the present invention more clearly understood, the present invention will be further described below with reference to the accompanying drawings and embodiments. Example embodiments, however, can be embodied in various forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repeated descriptions will be omitted. The words expressing position and direction described in the present invention are all described by taking the accompanying drawings as an example, but changes can also be made as required, and the changes are all included in the protection scope of the present invention. The accompanying drawings of the present invention are only used to illustrate the relative positional relationship and do not represent the actual scale.

At present, LED is the most widely used lighting device due to its remarkable features such as high efficiency and energy saving, fast response speed and long service life. In contrast, OLED also has unique advantages such as surface emission, no glare and no heat dissipation during use, and is gradually used in the field of lighting.

However, currently, OLED lighting devices are usually monochromatic devices, which can only emit light of one color, and cannot adjust the color temperature, which is not suitable for various scenes in work and life.

An OLED device typically includes a cathode, an anode, and at least one organic light-emitting layer sandwiched between the two electrodes. When a voltage is applied to the OLED device, positive and negative charges recombine in the light-emitting layer and generate light. In the related art, since OLED lighting devices all use monochromatic devices, if you want to adjust the color temperature of the OLED lighting device, it is necessary to set up multiple OLED device layers, and at least two of the multiple OLED device layers emit light of different colors, through the The color temperature is adjusted by adjusting the luminous brightness of different OLED device layers.

FIG. 1 is a schematic structural diagram of a lighting device in the related art.

As shown in FIG. 1 , the lighting device in the related art includes a first OLED device layer 10 , a second OLED device layer 20 and a third OLED device layer 30 , and may also include a reflective layer 40 , a second OLED device layer 20 , a first The OLED device layer 10 and the light-reflecting layer 40 are sequentially disposed on the third OLED device layer 30 . Each OLED device layer contains at least one OLED device emitting light of the same color.

In embodiments comprising three OLED device layers, which typically emit red, green, and blue light, respectively, light of the desired color temperature is obtained by applying voltages to the different OLED device layers.

It can be seen that in the related art, the lighting device usually uses the lighting structure of a single-layer OLED device, and the color temperature cannot be adjusted.

In view of this, embodiments of the present invention provide a lighting device, which can adjust the color temperature of the lighting device according to switching of practical scenarios, so as to achieve a high-quality lighting environment.

FIG. 2 is one of the schematic structural diagrams of the lighting device provided by the embodiment of the present invention.

As shown in FIG. 2 , the lighting device provided by the embodiment of the present invention includes: a plurality of organic light-emitting devices a1 , a plurality of signal terminals a2 and a plurality of signal lines a3 .

In this embodiment of the present invention, the lighting device is an OLED lighting device, and the organic light-emitting device a1 may be an OLED device. OLED devices are usually composed of an anode, a light-emitting layer and a cathode. The anode can be made of transparent conductive materials such as indium tin oxide (ITO), the light-emitting layer can be made of organic light-emitting materials, and the cathode can be made of silver, magnesium or metal. made of oxides. The structure of each layer of the OLED device can be fabricated by processes such as evaporation or solution method, and the fabrication method of the OLED device and the materials used for each layer are not limited herein.

In the embodiment of the present invention, the OLED device is a block structure, and each OLED device adopts a common cathode connection, that is, each OLED device shares the same cathode, then by applying different signals to the anodes of different OLED devices, the OLED device can be changed. The driving current of the device, thereby changing the luminous brightness of the OLED device.

As shown in FIG. 2 , in the embodiment of the present invention, a plurality of organic light-emitting devices a1 are arranged in an array along the first direction X1 and the second direction X2 to form a plurality of organic light-emitting device columns L extending along the second direction X2, Wherein, the first direction X1 and the second direction X2 intersect. In specific implementation, the first direction X1 may be the row direction, and the second direction may be the column direction; or, the first direction X1 may be the column direction, and the second direction may be the row direction; the first direction X1 and the second direction X2 can be perpendicular to each other.

In the embodiment of the present invention, the color of the emitted light of the same organic light emitting device column L is the same, and the color of the emitted light of at least two organic light emitting device columns L is different.

In some embodiments, the organic light-emitting device a1 may include organic light-emitting devices of multiple colors, for example, may include red organic light-emitting devices, green organic light-emitting devices, blue organic light-emitting devices, and white organic light-emitting devices. When applied to special application scenarios, organic light-emitting devices of other colors can also be used according to requirements. The organic light-emitting materials used in the light-emitting layers of the organic light-emitting devices a1 that emit light of different colors are different. The color type of each organic light-emitting device a1 is not limited here.

The organic light-emitting device a1 of the same color is arranged into a plurality of organic light-emitting device columns, and then the organic light-emitting device columns of each color are arranged in a set order to obtain the organic light-emitting device array shown in FIG. 2 .

In some other embodiments, the organic light-emitting devices a1 are all white organic light-emitting devices, that is, the organic light-emitting materials used in the light-emitting layers of each organic light-emitting device a1 are the same, and another organic light-emitting device is provided on the light-emitting side of all the organic light-emitting devices a1. The color filter layer is used to make each organic device column L emit light of different colors. The lighting device contains at least two organic light emitting device columns with different colors, that is, the color filter layer should contain at least two color filter units with different colors, and each color filter unit corresponds to the position of each white organic light emitting device one-to-one.

FIG. 3 is a cross-sectional view of a lighting device according to an embodiment of the present invention.

Specifically, as shown in FIG. 3 , each organic light-emitting device a1 is a white organic light-emitting device, each color filter unit included in the color filter layer CM corresponds to the organic light-emitting device a1 one-to-one, and the white light emitted by each organic light-emitting device a1 is colored The film layer CM is then converted into light of the corresponding color of each color filter unit.

As shown in FIG. 3 , the color filter layer CM can usually be formed on a transparent substrate T, and the surface of each organic light emitting device is usually provided with an encapsulation layer F, and the transparent substrate T formed with the color filter layer CM and each organic light emitting device are connected Lamination, so that each color filter unit corresponds to the position of each organic light-emitting device. As shown in FIG. 3 , the color filter layer CM may include multiple red color filter units CM1 , multiple green color filter units CM2 and multiple blue color filter units CM3 . Besides, color filter units of other colors can also be set according to actual needs, which is not limited here.

The organic light-emitting device array shown in FIG. 2 is obtained by arranging the color filter units of the same color into a plurality of color filter unit columns, and arranging the color filter unit columns of different colors in a set order.

As shown in FIG. 3 , the lighting device further includes: a driving board N. The driving board N includes a substrate and a circuit located on the substrate. In the embodiment of the present invention, each organic light emitting device a1 is located on the driving board N and is electrically connected to the driving board.

The driving board N can generally be set in a rectangular or square shape. When the lighting device adopts a special-shaped structure, the driving board N can also be set in a special-shaped structure, which is not limited herein. Since the driving board N in the embodiment of the present invention is applied to the lighting field rather than the display field, the manufacturing process thereof is relatively simpler, which is beneficial to reduce the manufacturing cost.

Specifically, a whole layer of conductive material is first formed on the substrate, and the conductive material may be a metal material such as copper, which is not limited herein. Then, the conductive material layer is patterned by etching to obtain the required circuit. Finally, an insulating material is covered on the circuit to form an insulating layer, and holes are drilled at the position of the insulating layer relative to each organic light-emitting device a1, so that the anode layer of the organic light-emitting device can be formed. connect.

As shown in FIG. 2 , the lighting device provided by the embodiment of the present invention includes a plurality of signal terminals a2 and a plurality of signal lines a3 . The signal terminals a2 and the signal lines belong to a circuit and can be fabricated at the same time when the circuit is formed.

As shown in FIG. 2 , a plurality of signal terminals a2 are located on one side of all the organic light-emitting devices a1 in the second direction X2 for providing power signals; a plurality of signal lines a3 extend along the second direction X2 and along the first direction X1 Arranged, one signal line a3 is connected to one organic light emitting device column L, and one signal terminal a2 is connected to at least one signal line a3.

In the embodiment of the present invention, the lighting device includes at least two organic light-emitting device columns L that emit light of different colors, and each organic light-emitting device column L is respectively connected to a signal line a3, and each signal line a3 is finally connected to different signal terminals on a2. Then, the driving current of the connected organic light-emitting device column can be changed by changing the power signal transmitted by the signal terminal a2, thereby changing the light-emitting brightness of the organic light-emitting device column. The brightness ratio of different colors of light of the lighting device can be changed, so as to achieve the effect of adjusting the color temperature.

FIG. 4 is a second schematic structural diagram of an illumination device provided by an embodiment of the present invention.

As shown in FIG. 4 , the lighting device provided by the embodiment of the present invention further includes: a switch circuit E and a switch signal line SW. The switch circuit E is located between the signal line a3 and the signal terminal a2. The switch signal line SW is adjacent to the switch circuit E, the switch circuit E is connected to the switch signal line SW, and the switch signal line SW provides the switch circuit E with a switch signal. In a specific implementation, the switch signal line SW may also be connected to a switch signal terminal, and the switch signal terminal may be disposed adjacent to each of the above signal terminals a2.

Specifically, the switch circuit E includes a plurality of switch transistors a4. In the embodiment of the present invention, the switch transistor a4 may use a thin film transistor (Thin Film Transistor, TFT for short), etc., which is not limited herein. In this embodiment of the present invention, the number of switch transistors a4 and the number of signal lines a3 may be the same, each switch transistor a4 is correspondingly connected to one signal line a3, and one signal terminal a2 is correspondingly connected to at least one switch transistor a4. The switch transistor a4 includes a control electrode, a first electrode and a second electrode, wherein the control electrode is connected to the switch signal line SW, the first electrode is connected to the corresponding signal line a3, and the second electrode is connected to the corresponding signal terminal a2. The switch transistor a4 is used to transmit the power signal provided by the signal terminal connected with the second pole to the first pole under the control of the switch signal transmitted by the switch signal line SW.

Specifically, the switch transistor a4 may be a p-type transistor or an n-type transistor, and the switch signal transmitted by the switch signal line SW may be a level signal. When the switching transistor a4 is a p-type transistor, the switching signal is a low-level signal as an effective level signal, and when the switching signal is a low-level signal, the switching transistor a4 is turned on, which can transmit the power signal of the second pole to the first One pole; when the switching transistor a4 is an n-type transistor, the switching signal takes a high-level signal as an effective level signal, and when the switching signal is a high-level signal, the switching transistor a4 is turned on, and the power supply signal of the second pole can be turned on. transmitted to the first pole.

In the embodiment of the present invention, the lighting device includes at least two organic light-emitting device columns L that emit light of different colors, each organic light-emitting device column L is respectively connected to a signal line a3, and each signal line a3 is connected to its corresponding switching transistor a4 The first pole of the switch transistor a4 is connected to different signal terminals a2 through the second pole of the switch transistor a4, and the control pole of the switch transistor a4 is connected to the switch signal line SW. In this way, by controlling the level signal transmitted on the switch signal line SW, each switching transistor a4 can be controlled to be on or off, so that when each switching transistor a4 is turned on, the power supply signal provided by each signal terminal a2 is passed through the corresponding The signal line a3 is loaded onto the organic light emitting device column L.

In a specific implementation, the switch of the lighting device can be controlled by controlling the switch signal on the ON signal terminal. For example, when the switch signal provided on the switch signal terminal is a level signal that can turn on each switch transistor a4, then each switch transistor a4 is turned on, and the power signal on each signal terminal a2 can be applied to the corresponding organic light-emitting device on the column L, thereby controlling the lighting device to emit light. When the switch signal provided on the switch signal terminal is a level signal that can turn off each switch transistor a4, then each switch transistor a4 is turned off, and the power signal on each signal terminal a2 can no longer be applied to the corresponding organic light-emitting device. on column L, thereby controlling the lighting device to be turned off. It can be seen that after the switch circuit is set in the lighting device, the switch of the lighting device can be controlled without changing the power signal of each signal terminal a2, so after the color temperature of the lighting device has been set, it is no longer necessary to frequently change each The power signal on the signal terminal a2 only needs to control the opening or closing of the switch circuit to control the switch of the lighting device.

In a specific implementation, a switch button may be provided in the lighting device to trigger the switch signal provided on the open signal terminal. When the switch button is turned on, the controllable switch circuit is in a conducting state, and the lighting device is turned on; when the switch button is turned off, the controllable switch circuit is in an off state, and the lighting device is turned off at this time.

For the lighting device shown in FIG. 4 , when the switch circuit is turned on, the driving current of the corresponding organic light-emitting device column L can be changed by changing the power signal transmitted by the signal terminal a2, thereby changing the light emission of the organic light-emitting device column L. By changing the luminous brightness of the organic light-emitting device columns emitting light of different colors, the brightness ratio of the light of different colors of the lighting device can be changed, so as to achieve the effect of adjusting the color temperature.

FIG. 5 is the third schematic structural diagram of the lighting device provided by the embodiment of the present invention; FIG. 6 is the fourth schematic structural diagram of the lighting device provided by the embodiment of the present invention. The difference between the lighting device shown in FIG. 5 and FIG. 6 is that a switch circuit E is added to the lighting device shown in FIG. 6 .

As shown in FIG. 5 and FIG. 6 , the organic light emitting device column L includes at least one red organic light emitting device column L1, at least one green organic light emitting device column L2 and at least one blue organic light emitting device column L3. The first directions X1 are arranged in a set order. Red light, blue light, and green light can be combined into light of any color through different ratios. Therefore, setting the organic light-emitting device column L in the lighting device to be red, green, and blue, respectively, can meet the needs of most of the production and life. The demand for ambient light color temperature in the scene. The embodiments of the present invention are only described in detail by taking the organic light-emitting device column L including a red organic light-emitting device column, a green organic light-emitting device column, and a blue organic light-emitting device column as an example for specific description. In practical applications, organic light-emitting devices of other colors may also be included. column, the embodiment of the present invention does not limit the specific color and color combination of the organic light-emitting device column.

Correspondingly, the signal terminal a2 includes at least one first signal terminal VDD_1 , at least one second signal terminal VDD_2 and at least one third signal terminal VDD_3 .

In some embodiments, only one signal terminal is connected to one organic light emitting device column. Specifically, each red organic light emitting device column L1 is respectively connected to a first signal terminal VDD_1, and each green organic light emitting device column L2 is respectively connected to a first signal terminal VDD_1. Two signal terminals VDD_2, each blue organic light emitting device column L3 is respectively connected to a third signal terminal VDD_3. By changing the power signal transmitted by each signal terminal a2, the driving current of the corresponding organic light-emitting device column can be changed, thereby changing the light-emitting brightness of each organic light-emitting device column. By adjusting the brightness ratio of red light, green light, and blue light , so as to achieve the effect of adjusting the color temperature.

During specific implementation, the number of signal terminals and organic light-emitting device columns can be adjusted as required. For example, in a weak light environment, the number of organic light-emitting device columns and their correspondingly connected signal terminals can be increased, and in a strong light environment, the number of signal terminals can be reduced. The number of the organic light-emitting device columns and their correspondingly connected signal terminals enables the light emitted by the lighting device to adapt to the environment in which it is located. Alternatively, by controlling the power signal on each signal terminal a2, all or part of the organic light-emitting device row can be controlled to emit light, so as to flexibly adjust the brightness ratio of the outgoing light of different colors, so as to adapt to the color temperature of the outgoing light of the lighting device in a special lighting environment. requirements.

FIG. 7 is a fifth schematic structural diagram of a lighting device provided by an embodiment of the present invention; and FIG. 8 is a sixth schematic structural diagram of the lighting device provided by an embodiment of the present invention.

In some embodiments, as shown in FIGS. 7 and 8 , the signal terminal a2 includes only one first signal terminal VDD_1 , one second signal terminal VDD_2 and one third signal terminal VDD_3 . All the plurality of red organic light emitting device columns L1 are connected to the same first signal terminal VDD_1, all the plurality of green organic light emitting device columns L2 are connected to the same second signal terminal VDD_2, and all the plurality of blue organic light emitting device columns are connected to the same second signal terminal VDD_2. L3 are all connected to the same third signal terminal VDD_3.

Adjusting the power supply signal applied to the first signal terminal VDD_1 can adjust the brightness of the red light emitted by all the red organic light-emitting device columns L1 at the same time. Similarly, adjusting the power supply signal applied to the second signal terminal VDD_2 and the third signal terminal VDD_3, The brightness of the green light emitted by all the green organic device columns L2 and the brightness of the blue light emitted by all the blue organic device columns L3 can be adjusted separately, and the brightness ratio of the red light, green light, and blue light can be changed to adjust the brightness of the light emitted by the lighting device. color temperature.

During specific implementation, the number of organic light-emitting device columns can be adjusted as required, but the number of signal terminals is unchanged. Connecting the organic light emitting device columns of the same color to the same signal terminal reduces the number of signal terminals used in the lighting device. Thereby, the production cost and manufacturing difficulty of the lighting device can be reduced.

Based on the same inventive concept, an embodiment of the present invention further provides a method for adjusting the color temperature of a lighting device, which can adjust the color temperature of light emitted by any of the above-mentioned lighting devices.

FIG. 9 is a flowchart of a method for adjusting color temperature of a lighting device according to an embodiment of the present invention.

As shown in FIG. 9 , the color temperature adjustment method provided by the embodiment of the present invention includes:

S1. Receive color temperature adjustment instructions;

S2, applying corresponding power signals to the plurality of signal terminals according to the color temperature adjustment instruction.

Specifically, the color temperature adjustment instruction in step S1 is used to instruct to increase or decrease the color temperature of the lighting device. Light with low color temperature is more red and warm, giving people a warm and comfortable feeling, and is often used in homes, shopping malls, cafes and other environments; light with high color temperature is blue and cold, which can improve people's alertness and is often used in factories, in offices, libraries, etc. When the method is specifically implemented, firstly, an instruction to increase or decrease the color temperature needs to be given according to different usage scenarios.

The lighting device can use the matching control panel or remote controller to adjust the color temperature of the lighting device. Usually, corresponding buttons can be configured on the control panel or remote controller to instruct to increase or decrease the color temperature of the lighting device. When the user presses the corresponding key, a corresponding color temperature adjustment instruction can be sent to the lighting device.

Specifically, when the color temperature adjustment instruction received by the lighting device is used to instruct to increase the color temperature, the first power supply signal is applied to a plurality of signal terminals according to the color temperature adjustment instruction to increase the proportion of blue light in the emitted light of the lighting device, and the lighting device can be increased. color temperature.

When the color temperature adjustment command received by the lighting device is used to instruct to reduce the color temperature, the second power signal is applied to the plurality of signal terminals according to the color temperature adjustment command to increase the proportion of red light in the emitted light of the lighting device, thereby reducing the color temperature of the lighting device.

The levels of the first power supply signal and the second power supply signal can be the same or different. This is because the color temperature is determined by the brightness ratio of different colors of light. When the color temperature is increased, the brightness of the blue light can be increased, or the corresponding When the color temperature is lowered, the brightness of red light can be increased, and the brightness of blue light can be reduced accordingly. Therefore, during specific implementation, the power supply signal on the signal terminal can be adjusted according to actual needs, and the embodiment of the present invention does not limit the specific value of the power supply signal applied to each signal terminal.

In some embodiments, the lighting device may adopt the structure shown in FIG. 7 or FIG. 8 . In this case, the signal terminals include: a first signal terminal, a second signal terminal, and a third signal terminal. Each red organic light emitting device column is connected to the same first signal terminal through a corresponding signal line, each green organic light emitting device column is respectively connected to the same second signal terminal through a corresponding signal line, and each blue organic light emitting device column is respectively connected to the same second signal terminal through a corresponding signal line. The signal line is connected to the same third signal terminal. Then, adjusting the power supply signals of the first signal terminal, the second signal terminal and the third signal terminal respectively can change the luminous brightness of the red, green and blue light emitted by each organic light-emitting device column, thereby adjusting the red light in the emitted light of the lighting device. The ratio of light, green light and blue light changes the color temperature of the lighting device.

When the lighting device shown in FIG. 7 or FIG. 8 is used, the effect of color temperature adjustment can be achieved by using only a small number of signal terminals, and the requirements for the manufacturing cost and manufacturing process of the lighting device will be relatively lower. When the number of columns is large, the lighting device can be simplified.

In other embodiments, the lighting device may adopt the structure shown in FIG. 5 or FIG. 6 . In this case, the signal terminals include: at least one first signal terminal, at least one second signal terminal, and at least one third signal terminal. The number of signal terminals is the same as the number of organic light emitting device columns. Taking the structure shown in FIG. 5 or FIG. 6 as an example, the signal terminals include a plurality of first signal terminals, a plurality of second signal terminals and a plurality of third signal terminals. A first signal terminal is connected to a column of red organic light-emitting devices through a signal line, a second signal terminal is connected to a column of green organic light-emitting devices through a signal line, and a third signal terminal is connected to a blue organic light-emitting device through a signal line. List.

During specific implementation, one adjacent red organic light-emitting device column, one green organic light-emitting device column, and one blue organic light-emitting device column may be formed into one organic light-emitting device group, and each organic light-emitting device group may be individually adjusted. For the same organic light-emitting device group, the power supply signals of the first signal terminal, the second signal terminal and the third signal terminal are adjusted respectively to change the light-emitting brightness of red light, green light and blue light emitted by the organic light-emitting device group, thereby The color temperature of the organic light emitting device group is adjusted. Then, the purpose of adjusting the color temperature of the lighting device can be achieved by mixing the color temperature of each organic light-emitting device group.

When the lighting device shown in FIG. 5 or FIG. 6 is used, individual control of each signal terminal can be realized, so that each column of organic light-emitting device columns can emit light with different brightness, and can also be individually controlled for each organic light-emitting device group. Adjusting the color temperature can be applied to various scenes such as adjusting only the local color temperature.

It is worth noting that the lighting device needs to be subjected to an aging test after leaving the factory, and the aging test needs to load a large driving current on the lighting device, which puts a large pressure on the circuit. In the embodiment of the present invention, by connecting the organic light emitting device columns to different signal terminals respectively, during the aging test, the organic light emitting devices can be tested by partitions or groups, which can reduce the current of the circuit and put less pressure on the circuit.

Specifically, the aging test may be performed on all the red organic light-emitting device columns first, then the aging test may be performed on all the green organic light-emitting device columns, and then the aging test may be performed on all the blue organic light-emitting device columns; The organic light-emitting device group was subjected to an aging test. The embodiment of the present invention does not limit the specific test process, and any lighting device structure provided by the embodiment of the present invention can reduce the pressure on the circuit in the aging test.

Although preferred embodiments of the present invention have been described, additional changes and modifications to these embodiments may occur to those skilled in the art once the basic inventive concepts are known. Therefore, the appended claims are intended to be construed to include the preferred embodiment and all changes and modifications that fall within the scope of the present invention.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present invention without departing from the spirit and scope of the invention. Thus, provided that these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims (10)

1. A lighting device, characterized in that, comprising: A plurality of organic light-emitting devices are arranged in an array along a first direction and a second direction to form a plurality of organic light-emitting device columns extending along the second direction, and the first direction and the second direction intersect; The colors of the emitted light of the organic light-emitting device columns are the same, and the colors of the emitted light of at least two of the organic light-emitting device columns are different; a plurality of signal terminals, located on one side of all the organic light-emitting devices in the second direction; the signal terminals are used for providing power signals; A plurality of signal lines extend along the second direction and are arranged along the first direction; one of the signal lines is connected to one of the organic light-emitting device columns; and one of the signal terminals is connected to at least one of the signal lines. 2. The lighting device of claim 1, further comprising: a switch circuit, located between each of the signal lines and each of the signal terminals; the switch circuit includes a plurality of switch transistors, one of the switch transistors is connected to one of the signal lines, and one of the signal terminals is connected to at least one of the signal lines the switch transistor; the switch transistor includes a control electrode, a first electrode and a second electrode; a switch signal line, the control electrode of each switch transistor is connected to the switch signal line, the first electrode of the switch transistor is connected to the corresponding signal line, and the second electrode of the switch transistor is connected to the corresponding signal terminal ; the switch transistor is used to transmit the power signal provided by the signal terminal connected to the second pole to the first pole under the control of the switch signal transmitted by the switch signal line. 3. The lighting device according to claim 1 or 2, wherein the organic light emitting device column comprises: at least one red organic light emitting device column, at least one green organic light emitting device column and at least one blue organic light emitting device column ; The red organic light emitting device column, the green organic light emitting device column, and the blue organic light emitting device column are arranged in a set order along the first direction. 4. The lighting device of claim 3, wherein the signal terminals comprise: a first signal terminal, a second signal terminal, and a third signal terminal; Each of the red organic light-emitting device columns is respectively connected to the first signal terminal through a corresponding signal line; each of the green organic light-emitting device columns is respectively connected to the second signal terminal through a corresponding signal line; each of the blue organic light-emitting device columns is respectively connected to the second signal terminal The light emitting device columns are respectively connected to the third signal terminals through corresponding signal lines. 5 . The lighting device according to claim 3 , wherein the number of the red organic light emitting device columns, the green organic light emitting device columns and the blue organic light emitting device columns is multiple; the signal The terminals include: a plurality of first signal terminals, a plurality of second signal terminals, and a plurality of third signal terminals; One of the first signal terminals is connected to one of the red organic light-emitting device columns through one of the signal lines, one of the second signal terminals is connected to one of the green organic light-emitting device columns through one of the signal lines, and one of the first The three signal terminals are connected to one of the blue organic light emitting device columns through one of the signal lines. 6. The lighting device of claim 3, further comprising: a driving board; the driving board includes a substrate and a circuit located on the substrate; the circuit includes the plurality of signal lines and the plurality of signal terminals; the organic light-emitting device is located on the driving board, electrically connected with the drive board; The organic light-emitting device includes: an anode, which is located on the driving board and is electrically connected to the corresponding signal line; a light-emitting layer, located on the side of the anode away from the driving board; a cathode, located on the side of the light-emitting layer away from the anode; all the organic light-emitting devices share the same cathode; Each organic light-emitting device in the red organic light-emitting device column is a red organic light-emitting device, each organic light-emitting device in the green organic light-emitting device column is a green organic light-emitting device, and each organic light-emitting device in the blue organic light-emitting device column The light-emitting device is a blue organic light-emitting device; The material of the light-emitting layer of the red organic light-emitting device, the material of the light-emitting layer of the green organic light-emitting device and the material of the light-emitting layer of the blue organic light-emitting device are all different; Alternatively, each organic light-emitting device in the red organic light-emitting device column, the blue organic light-emitting device column, and the green organic light-emitting device column is a white organic light-emitting device; all the light-emitting layers of the white organic light-emitting device the same material; The lighting device also includes: a color filter layer, located on the light-emitting side of the white organic light-emitting device; The color filter layer includes: multiple red color filter units, multiple green color filter units, and multiple blue color filter units; Each of the red color film units, each of the green color film units, and each of the blue color film units is in one-to-one correspondence with each of the white organic light-emitting devices; in the same organic light-emitting device row, the white organic light-emitting devices are in one-to-one correspondence. The color filter units corresponding to the device have the same color. 7. A color temperature adjustment method based on the lighting device according to any one of claims 1-6, characterized in that, comprising: receiving a color temperature adjustment instruction; the color temperature adjustment instruction is used to instruct to increase or decrease the color temperature of the lighting device; A corresponding power signal is applied to the plurality of signal terminals according to the color temperature adjustment instruction, so as to adjust the color temperature of the lighting device. 8 . The color temperature adjustment method according to claim 7 , wherein when the color temperature adjustment instruction is used to instruct to increase the color temperature of the lighting device, the plurality of signals are sent to the plurality of signals according to the color temperature adjustment instruction. 9 . The corresponding power signal is applied to the terminal, including: Apply a first power signal to the plurality of signal terminals according to the color temperature adjustment instruction, so as to increase the proportion of blue light in the emitted light of the lighting device, and increase the color temperature of the lighting device; When the color temperature adjustment instruction is used to instruct to reduce the color temperature of the lighting device, applying the corresponding power signal to the plurality of signal terminals according to the color temperature adjustment instruction includes: A second power signal is applied to the plurality of signal terminals according to the color temperature adjustment instruction, so as to increase the proportion of red light in the emitted light of the lighting device, and reduce the color temperature of the lighting device. 9 . The color temperature adjustment method according to claim 7 , wherein the signal terminals comprise: a first signal terminal, a second signal terminal, and a third signal terminal; each of the red organic light-emitting devices The columns are respectively connected to the first signal terminals through corresponding signal lines; the green organic light-emitting device columns are respectively connected to the second signal terminals through corresponding signal lines; the blue organic light-emitting device columns are respectively connected to the second signal terminals through corresponding signal lines. a signal line is connected to the third signal terminal; The applying corresponding power signals to the plurality of signal terminals includes: Respectively adjust the power supply signal applied by the first signal terminal, the second signal terminal and the third signal terminal to adjust the ratio of red light, green light and blue light in the emitted light of the lighting device, and change the The color temperature of the lighting fixture. 10. The color temperature adjustment method according to claim 7 or 8, wherein the number of the red organic light emitting device columns, the green organic light emitting device columns and the blue organic light emitting device columns is multiple; Adjacent one of the red organic light-emitting device columns, the green organic light-emitting device column and the blue organic light-emitting device column constitute an organic light-emitting device group; the signal terminals include: a plurality of first signal terminals, a plurality of second signal terminals and a plurality of third signal terminals; one of the first signal terminals is connected to one of the red organic light-emitting device columns through one of the signal lines, and one of the second signal terminals is connected to one of the signal lines connecting one of the green organic light-emitting device columns, and one of the third signal terminals connected to one of the blue organic light-emitting device columns through one of the signal lines; The applying corresponding power signals to the plurality of signal terminals includes: Respectively adjust the power supply signals applied to the first signal terminal, the second signal terminal and the third signal terminal corresponding to each of the organic light-emitting device groups, so as to adjust the output light of each of the organic light-emitting device groups. The ratio of red light, green light and blue light changes the color temperature of each organic light emitting device group, so as to change the color temperature of the mixed light of each organic light emitting device group.

Images