CN104048187A - Lighting device with gradually changing color temperature - Google Patents

Abstract

The invention provides a lighting device with gradually changing color temperature, which comprises a lighting module and a control module. The illumination module is used for generating illumination light with a plurality of different color temperatures. The control module is used for controlling the color temperature change of the illumination light, so that the color deviation value of the illumination light corresponding to change is less than 0.006 under the color temperature change. In addition, the color rendering indexes of the illumination lights with the plurality of different color temperatures are all larger than 90 so as to completely simulate the change of the sunlight.

Description

Lighting installation with gradient color temperature

technical field

The invention relates to an illuminating device, in particular to an illuminating device with gradient color temperature.

Background technique

At present, there are lamps on the market that use red, green, and blue light-emitting diodes (RGB LEDs) for color mixing, but this type of lamps is generally only suitable for situational lighting and background lighting. The color rendering is less than 70, and the color rendering that does not meet the indoor lighting requirements specified by Energy star needs to be greater than 80.

In addition, the existing dimmable lamps generally can only present three kinds of lighting lights with color temperatures of about 2800K, 4000K and 6500K. Such dimmable lamps generally use RGB LEDs or cyan and red crystal LEDs plus yellow phosphor to construct LED lamps with adjustable color temperature, but the color temperatures of such products cannot all meet The color rendering specified by Energy Star is greater than the requirement of 80. Moreover, since there are only three color temperatures available for modulation, the user's vision cannot adapt in real time when changing lighting lights with different color temperatures, which often causes discomfort.

In other applications such as light therapy, dimmable lamps can use the dawn simulator (dawn simulator) whose brightness of white light can be changed over time to relieve depression, seasonal depression and adjust the phase of biological clock . However, the light currently used in phototherapy is often monochromatic strong light such as blue light or white light with high brightness, or only a few segments of color temperature changes, which cannot fully simulate the color temperature and illuminance changes of the sun from morning to dusk .

Contents of the invention

In view of this, the object of the present invention is to provide a lighting device with gradually changing color temperature, which can emit illumination light with multi-stage color temperature changes that cannot be perceived by the human body, and the color rendering index of each stage of color temperature is greater than 90. In addition, the lighting device of the present invention can further adjust the appropriate brightness and match the color temperature change to completely simulate daylight.

To achieve the above purpose, the present invention provides a lighting device with gradient color temperature, which includes a lighting module and a control module. The lighting module is used for generating lighting lights with multiple different color temperatures. The control module is used to control the change of the color temperature of the illumination light, so that under the change of the color temperature, the color deviation value of the corresponding change of the illumination light is less than 0.006. In addition, the color rendering indices of the illumination lights with the plurality of different color temperatures are all greater than 90.

In a preferred embodiment, the color temperature change is selected from 1600K, 1651K, 1705K, 1762K, 1822K, 1886K, 1954K, 2027K, 2105K, 2188K, 2277K, 2373K, 2476K, 2587K, 2700K, 2836K, 3000K, 3128K, 3293K , 3500K, 3666K, 3878K, 4000K, 4362K, 4500K, 5000K, 5288K, 5700K, 6098K, 6500K, 7147K, 7803K, 8582K, 9529K, 10711K, 12242K, 14322K, 17350K, and 2000 o Color temperature changes.

In this preferred embodiment, the control module is further used to control the brightness change of the illumination light. Specifically, the control module controls the color temperature of the illumination light to change multiple times from 1600K to 12000K, and the brightness changes corresponding to the multiple color temperatures are S-curve changes. In addition, the control module controls the color temperature of the illumination light to change multiple times from 12000K to 1600K, and the brightness changes corresponding to the multiple color temperatures are reverse S-curve changes.

In another preferred embodiment, the control module controls the color temperature of the illumination light to perform multiple linear changes from 1600K to 12000K, and the time for the color temperature of the illumination light to perform multiple linear changes from 1600K to 12000K is From 13:30 to 15:30.

In a preferred embodiment, the lighting module includes a light source combination, and the light source combination includes: a first light emitting diode, the main wavelength of light emitted by it is 448nm±20nm; a second light emitting diode, which emits The main wavelength of the light is 505nm±20nm; a third light-emitting diode, the main wavelength of the light emitted by it is 562nm±20nm; and a fourth light-emitting diode, the main wavelength of the light emitted by it is 619nm±20nm. Furthermore, the lighting module further includes a driving module, which is electrically connected to the light source combination and the control module, and the driving module is used to drive a plurality of light-emitting diodes to emit light, and to control them according to the control module The luminous energy of the plurality of light emitting diodes is proportioned so that it emits the illumination light with the plurality of color temperatures and luminances.

According to the lighting device with gradient color temperature of the present invention, it uses the above-mentioned light sources to combine and gradually emit illumination light of various color temperatures, and the color rendering index of the illumination light of each color temperature is greater than 90. In addition, the color deviation value before and after each illumination light change is less than 0.006, so it is not noticed by the human body. In addition, the lighting device with gradient color temperature of the present invention can also control the color temperature of the lighting light to change from 1600K to 12000K multiple times, and the brightness change corresponding to the multiple color temperatures is an S-shaped curve change, so as to completely simulate the change of morning light . Similarly, the lighting device with gradually changing color temperature of the present invention can also control the color temperature of the lighting light to change from 12000K to 1600K multiple times, and the brightness changes corresponding to the multiple color temperatures are inverse S-curve changes, so as to completely simulate the twilight effect. Variety. In addition, the lighting with a color temperature that changes linearly from 1600K to 12000K can also be used to relieve drowsiness in the afternoon.

Description of drawings

In order to make the above content of the present invention more comprehensible, preferred embodiments are specifically cited below, together with the accompanying drawings, and described in detail as follows.

FIG. 1 is a block diagram of a lighting device with gradient color temperature according to a preferred embodiment of the present invention.

Fig. 2 is an xy chromaticity diagram of illumination lights with multiple different color temperatures emitted by the illumination module of the present invention.

Figure 3 is a list of multiple color temperatures described in the present invention.

Fig. 4 is a graph showing the luminance variation of the illumination light simulating the morning light emitted by the illumination module of the present invention.

Fig. 5 is a graph showing the luminance variation of the illumination light emitted by the illumination module according to the present invention to simulate twilight.

Description of main component symbols:

100 Lighting device with gradient color temperature 120 Lighting module

124 Light source combination 126 Driver module

140 Control Module 200 Blackbody Radiation Locus

1241 1st LED 1242 2nd LED

1243 Third LED 1244 Fourth LED

Detailed ways

A preferred embodiment of the lighting device with gradient color temperature provided by the present invention will be described in detail below with reference to the accompanying drawings.

Please refer to FIG. 1 , which is a block diagram of a lighting device with gradient color temperature according to a preferred embodiment of the present invention. The lighting device 100 with gradient color temperature described in this embodiment includes a lighting module 120 and a control module 140 . The lighting module 120 is used for generating lighting lights with multiple different color temperatures. Preferably, the lighting module 120 includes a light source assembly 124 and a driving module 126 . In this embodiment, the light source assembly 124 includes a first LED 1241 , a second LED 1242 , a third LED 1243 , and a fourth LED 1244 . However, the present invention does not limit the lighting module 120 to be implemented only with light emitting diodes (LEDs), and other components with light emitting properties such as organic light emitting diodes (OLEDs) can be used to implement the present invention.

Further, the main wavelength of the light emitted by the first light emitting diode 1241 is 448nm±20nm; the main wavelength of the light emitted by the second light emitting diode 1242 is 505nm±20nm; the main wavelength of the light emitted by the third light emitting diode 1243 The main wavelength of the emitted light is 562nm±20nm; and the main wavelength of the light emitted by the fourth light emitting diode 1244 is 619nm±20nm. In addition, the above four LEDs are arranged on the same circuit board (not shown in the figure) very close to each other, so as to achieve a preferred light mixing effect. It should be noted that the present invention does not limit the arrangement of the above four LEDs.

As shown in FIG. 1 , the driving module 126 is electrically connected to the light source assembly 124 and the control module 140 . Specifically, the driving module 126 is electrically connected to the first LED 1241 , the second LED 1242 , the third LED 1243 and the fourth LED 1244 respectively. The driving module 126 is used to drive the plurality of light emitting diodes to emit light, and control the energy ratio of the plurality of light emitting diodes according to the control module 140, so as to emit lighting with the plurality of color temperatures and brightness Light. Specifically, the driving module 126 can be a microprocessor (microprocessor), and the microprocessor can synchronously send four pulse width modulation (Pulse Width Modulation, PWM) signals and send them to corresponding light-emitting diodes respectively, In order to control the energy ratio of the first light emitting diode 1241 , the second light emitting diode 1242 , the third light emitting diode 1243 and the fourth light emitting diode 1244 . When the plurality of light-emitting diodes receive appropriate PWM signals, they can emit illumination lights with various color temperatures, and all these illumination lights can meet the specification of the energy star's color rendering index greater than 80. What's more, by properly adjusting the energy ratio of each LED, the color rendering index of the illumination lights with the plurality of different color temperatures emitted by the light source combination 124 of this embodiment is greater than 90. Accordingly, the lighting device 100 with gradient color temperature in this embodiment will have an excellent lighting effect.

The operation of the control module 140 will be described in detail below. Please refer to FIG. 2 and FIG. 3 , FIG. 2 is an xy chromaticity diagram (chromaticity diagram) of illumination lights with multiple different color temperatures emitted by the lighting module 120 of the present invention; List of color temperatures. The control module 140 is used for controlling the change of the color temperature of the illumination light, so that under the change of the color temperature, the color deviation (Duv) value of the corresponding change of the illumination light is less than 0.006. Please refer to FIG. 1 and FIG. 2 together, the control module 140 will control the driving module 126, so that the driving module 126 sends an appropriate PWM signal to drive the light source combination 124 (that is, the main wavelengths are 448nm, 505nm, 562nm and 619nm) And mix the illumination lights with multiple different color temperatures, wherein the illumination lights with the multiple different color temperatures all fall in the black body radiation locus 200 in the xy chromaticity diagram, wherein the illumination light represented by each color temperature is in the xy chromaticity It is represented by X in the figure. Preferably, the color temperature gradually changes from reddish 1600K to bluish 20000K.

The control module 140 of this embodiment can control the color temperature change of the illumination light, so that the color deviation (Duv) value of the illumination light before and after the color temperature change is less than 0.006, so that the color temperature change will not be noticed by the human body, and a gradual change can be achieved Effect. As shown in FIG. 3 , in this embodiment, the maximum change range of each color temperature change within a color deviation value of 0.006 is listed in the change from 1600K to 20000K. In short, the plurality of color temperature changes are selected from 1600K, 1651K, 1705K, 1762K, 1822K, 1886K, 1954K, 2027K, 2105K, 2188K, 2277K, 2373K, 2476K, 2587K, 2700K, 2836K, 3000K, 3128K, 3293K, 3500K, 3666K, 3878K, 4000K, 4362K, 4500K, 5000K, 5288K, 5700K, 6098K, 6500K, 7147K, 7803K, 8582K, 9529K, 10711K, 12242K, 14322K, 17350K, and any two adjacent color temperature groups composed of 0K The change. However, in other embodiments, different light sources have different color temperature change values, which can be converted into uv coordinates by the xy chromaticity coordinates (chromaticity coordinate) of each illuminating light in the xy chromaticity diagram, and then compare the uv coordinates before and after the change If the distance is less than 0.006, the required color temperature change table can be obtained, and the specific steps will not be repeated here.

Please refer to FIG. 4 and FIG. 5. FIG. 4 is a diagram showing the luminance change of the lighting light simulated by the lighting module 120 according to the present invention to simulate morning light; FIG. 5 is a simulated twilight light emitted by the lighting module 120 according to the present invention Brightness change graph. In order to simulate the change of daylight from morning to dusk, the control module 140 is further used to control the brightness change of the illumination light.

Specifically, when the lighting device 100 with gradient color temperature is used as a morning light simulator, the control module 140 can control the color temperature of the lighting light to change from 1600K to 12000K multiple times, as shown in Figure 4 As shown, the brightness change corresponding to the multiple color temperatures presents a S-shaped curve (sigmoidal curve) change, and the change time is about 6 hours. Specifically, the morning light simulator can use, for example, the sun rises at six o'clock in the morning on the spring and autumn equinoxes, five o'clock in the morning on the summer solstice, and six thirty in the morning on the winter solstice, and these times can be used as starting points. In the first period T1, the color temperature and illuminance changes more slowly. The color temperature changes every 6 minutes starting from 2000K. There are 5 color temperatures in total. In the second period T2, the color temperature and illuminance change more violently, and the color temperature changes every 4.5 minutes. A total of 20 color temperatures are changed, and in the third period T3, the color temperature changes slightly, changing one color temperature every 12 minutes, a total of 4 color temperatures are changed, and the color temperature is maintained at 12000 K in the future. After the color temperature change is set, the light source combination 124 is controlled by the control module 140 to emit the required brightness of the illumination light of each color temperature. The color temperature and brightness of the morning light simulator described in this embodiment are dynamically changed. Compared with the dimmable lamps that generally only change the brightness, the morning light simulator described in this embodiment is used as a bedside lamp in the dormitory. When the lamp is turned on, it will have a better effect of relieving depression.

Similarly, the lighting device 100 with gradient color temperature can be used as a twilight simulator, the control module 140 can control the color temperature of the lighting light to change from 12000K to 1600K multiple times, and the brightness corresponding to the multiple color temperatures The change is a reverse-sigmoidal curve change, and the change time is about 6 hours. The changes of the color temperature and brightness of the illumination light are opposite to those of the aforementioned morning light simulator, and will not be repeated here.

In other embodiments of the present invention, the lighting device 100 with gradually changing color temperature can also be used to relieve drowsiness in the afternoon, and the control module 140 controls the color temperature of the lighting light to change linearly from 1600K for several times. to 12000K, and the color temperature of the illumination light changes linearly from 1600K to 12000K multiple times, preferably from 13:30 to 15:30 in the afternoon, which has the effect of boosting the alertness of the user.

To sum up, the lighting device 100 with gradient color temperature according to the present invention uses the above-mentioned light source combination 124 to gradually emit illumination light of various color temperatures, and the color rendering index of the illumination light of each color temperature is greater than 90. In addition, the color deviation value before and after each illumination light change is less than 0.006, so it will not be noticed by the human body. In addition, the lighting device 100 with gradient color temperature according to the present invention can also control the color temperature of the illumination light to change from 1600K to 12000K multiple times, and the brightness change corresponding to the multiple color temperatures is an S-curve change, so as to Complete simulation of morning light changes. Similarly, the lighting device with gradually changing color temperature according to the present invention can also control the color temperature of the lighting light to change from 12000K to 1600K multiple times, and the brightness changes corresponding to the multiple color temperatures are inverse S-curve changes, so that Complete emulation of Twilight changes. In addition, the lighting with multiple linear changes in color temperature from 1600K to 12000K can also be used to soothe afternoon sleepiness.

The above is only a preferred embodiment of the present invention, it should be pointed out that for those of ordinary skill in the art, without departing from the principle of the present invention, some improvements and modifications can also be made, and these improvements and modifications should also be considered Be the protection scope of the present invention.

Claims (10)

1. a lighting device for tool gradual change colour temperature, is characterized in that, comprising: a lighting module, for generation of the illumination light with a plurality of different-colours; And a control module, for controlling the colour temperature of described illumination light, change, make under described colour temperature changes, the corresponding colour cast difference changing of described illumination light is less than 0.006.

2. the lighting device of tool gradual change colour temperature according to claim 1, is characterized in that, the colour index of drilling with the illumination light of described a plurality of different-colours is all greater than 90.

3. the lighting device of tool gradual change colour temperature according to claim 1, it is characterized in that, described colour temperature variation is selected from 1600K, 1651K, 1705K, 1762K, 1822K, 1886K, 1954K, 2027K, 2105K, 2188K, 2277K, 2373K, 2476K, 2587K, 2700K, 2836K, 3000K, 3128K, 3293K, 3500K, 3666K, 3878K, 4000K, 4362K, 4500K, 5000K, 5288K, 5700K, 6098K, 6500K, 7147K, 7803K, 8582K, 9529K, 10711K, 12242K, 14322K, 17350K, and 20000K forms the variation of any two adjacent colour temperatures in group.

4. the lighting device of tool gradual change colour temperature according to claim 1, is characterized in that, described control module is further used for controlling the brightness variation of described illumination light.

5. the lighting device of tool gradual change colour temperature according to claim 4, it is characterized in that, the colour temperature that described control module is controlled described illumination light repeatedly changes and the 12000K that arrives from 1600K, and is changed to the curvilinear motion of S type corresponding to the brightness of described a plurality of colour temperatures.

6. the lighting device of tool gradual change colour temperature according to claim 4, it is characterized in that, the colour temperature that described control module is controlled described illumination light repeatedly changes and the 1600K that arrives from 12000K, and is changed to reversed S shape variation corresponding to the brightness of described a plurality of colour temperatures.

7. the lighting device of tool gradual change colour temperature according to claim 4, is characterized in that, described control module is controlled the colour temperature of described illumination light and carried out repeatedly linear change and the 12000K that arrives from 1600K.

8. the lighting device of tool gradual change colour temperature according to claim 4, is characterized in that, the colour temperature of described illumination light from 1600K carry out repeatedly linear change and time of the 12000K that arrives for from 13:30 to 15:30.

9. the lighting device of tool gradual change colour temperature according to claim 1, is characterized in that, described lighting module comprises a combination of light sources, and described combination of light sources comprises:

One first light emitting diode, the main wavelength of the light that it sends is 448nm ± 20nm;

One second light emitting diode, the main wavelength of the light that it sends is 505nm ± 20nm;

One the 3rd light emitting diode, the main wavelength of the light that it sends is 562nm ± 20nm; And

One the 4th light emitting diode, the main wavelength of the light that it sends is 619nm ± 20nm.

10. the lighting device of tool gradual change colour temperature according to claim 9, is characterized in that, described lighting module further comprises:

One driver module, be electrically connected at described combination of light sources and described control module, described driver module is used for driving a plurality of lumination of light emitting diode, and according to described control module, control the energy proportioning of described a plurality of lumination of light emitting diode, so that described a plurality of light emitting diode sends the illumination light with described a plurality of colour temperature and brightness.