CN203895462U - Display panel and display device - Google Patents

Abstract

The utility model belongs to the field of display technology, in particular to a display panel and a display device. The display panel includes a color filter unit and a light source, the color filter unit includes a black matrix and a color filter layer, the black matrix is distributed in a grid shape, and the area not covered by the black matrix forms a sub-pixel area, and the color filter layer is arranged in the sub-pixel area Inside, the color film layer is provided with light-enhancing particles, and the light-enhancing particles have the property of being excited by the light component of the white light emitted by the light source that is different from the color of the color film layer to emit excitation light with the same color as the color film layer. The excitation light and the light source emit The outgoing light after the white light passes through the color filtering effect of the color filter layer can jointly exit the display panel. In the display panel, different brightness-enhancing particles are added to the color filter layers of different colors in the color filter unit, and through the light excitation of the brightness-enhancing particles, the light transmittance of the sub-pixel area of the corresponding color is increased, and the light transmission of the display panel is increased. The utilization rate of the light source is improved, and the brightness of the display panel is increased.

Description

Display panel and display device

technical field

The utility model belongs to the field of display technology, in particular to a display panel and a display panel.

display device.

Background technique

In recent years, flat panel display devices have become the current display mainstream. Current flat panel display devices mainly include liquid crystal (Liquid Crystal Display, LCD for short) display devices, organic light-emitting diode (Organic Light-Emitting Diode, OLED for short) display devices, and plasma display devices.

As shown in Figure 1, it is a structural schematic diagram of an existing liquid crystal display panel, which includes a backlight 9, a color filter substrate (which mainly includes a second substrate 6, a black matrix 5, a red color film layer 41, a green color film layer 42, and blue color filter layer 43 ), an array substrate (which mainly includes a first substrate 1 , a thin film transistor 2 ), and a liquid crystal 3 disposed between the color filter substrate and the array substrate.

Brightness is an important parameter of a flat panel display device. Taking a liquid crystal display device as an example, in order to increase the brightness, one way is to increase the brightness of the backlight source. On the other hand, it will increase the power consumption of the display device; another way is to increase the light transmittance, but at present, the full-color display of the liquid crystal display device is usually achieved by the combination of the backlight source and the color film substrate, such as In the combination of the color filter substrate and the backlight shown in Figure 1, only 1/3 of the light in the backlight is used, and the loss is as high as 2/3, and the light efficiency and light transmittance are relatively low.

Utility model content

The technical problem to be solved by the utility model is to provide a display panel and a display device for the above-mentioned deficiencies in the prior art. The display panel has high light transmittance, high light source utilization rate, and increased brightness.

The technical solution adopted to solve the technical problem of the utility model is that the display panel includes a color filter unit and a light source. The color filter unit includes a black matrix and a color filter layer. The black matrix is distributed in a grid shape and is not covered by the The area covered by the black matrix forms a sub-pixel area, and the color filter layer is arranged in the sub-pixel area, and the color filter layer is provided with light-enhancing particles, and the light-enhancing particles have the characteristics of being absorbed by the white light emitted by the light source and The property of exciting light components of different colors in the color filter layer to emit excitation light with the same color as the color filter layer, and the excitation light and the white light emitted by the light source are filtered by the color filter layer The emitted light can jointly exit the display panel.

Preferably, the color film layer includes a red color film layer, a green color film layer and a blue color film layer, the brightness enhancement particles include green brightness enhancement particles and blue brightness enhancement particles, and the red color film layer is provided with the Green light-enhancing particles and first blue light-enhancing particles, the green light-enhancing particles are excited by the green light component to emit red light, and the first blue light-enhancing particles are excited by the blue light component to emit red light; and/or, the green The second blue light-enhancing particles are arranged in the color filter layer, and the second blue light-enhancing particles are excited by the blue light component to emit green light.

Preferably, the particle size range of the green light-enhancing particles is 3.5-5.0 nm, the particle size range of the first blue light-enhancing particles is 5.0-5.5 nm; the particle size range of the second blue light-enhancing particles is 3.0-3.5nm.

Preferably, the light-enhancing particles include CdS, CdSe, CdTe, ZnO, ZnS, ZnSe or ZnTe of II-VI groups, and GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs of III-V groups. , InP, InSb, AlAs, AlP or AlSb composed of nanoparticles.

Preferably, the brightness-enhancing particles are formed by molecular beam epitaxy, metal-organic chemical vapor deposition, self-organized growth mode or colloidal chemical method.

Preferably, the display panel further includes a driving substrate, the color filter unit is arranged opposite to the driving substrate, and a thin film transistor is provided on the driving substrate corresponding to the sub-pixel region, and the thin film transistor is used for Controlling whether the light source emits light or whether the emitted light exits the color filter layer.

Preferably, the thin film transistor is an a-Si thin film transistor, an oxide thin film transistor, a low temperature polysilicon thin film transistor or a high temperature polysilicon thin film transistor.

Preferably, the thin film transistor includes a gate, a source and a drain, and the light source is light emitted by a white organic light emitting diode, and the white organic light emitting diode is arranged on the driving substrate corresponding to the sub-pixel area. In the area, the color filter unit is arranged on the light emitting side of the white organic light emitting diode, and the anode of the white organic light emitting diode is electrically connected to the drain of the thin film transistor.

Preferably, the thin film transistor includes a gate, a source and a drain, and a pixel electrode is also arranged in the region of the driving substrate corresponding to the sub-pixel region, and the pixel electrode is connected to the drain of the thin film transistor. electrical connection;

The light source is a backlight board provided with LED lamps, the backlight board is arranged on the side of the driving substrate away from the color filter unit, and the light-emitting surface of the LED lamp faces the driving substrate;

The display panel further includes a liquid crystal disposed between the color filter unit and the driving substrate.

A display device includes the above-mentioned display panel.

The beneficial effect of the utility model is: in the display panel of the utility model, by adding different brightness-enhancing particles in the color filter layers of different colors of the color filter unit, the light emitted by the light source can be fully utilized through the light excitation of the brightness-enhancing particles, Increasing the light transmittance of the sub-pixel area of the corresponding color increases the light transmittance of the display panel, and also improves the utilization rate of the light source (that is, improves the light efficiency), so that the brightness of the display panel increases.

Description of drawings

FIG. 1 is a schematic structural diagram of a display panel in the prior art;

Fig. 2 is a schematic structural view of the color filter unit in Embodiment 1 of the present utility model;

Fig. 3 is a schematic structural diagram of a display panel in Embodiment 1 of the present utility model;

FIG. 4 is a schematic structural diagram of a display panel in Embodiment 2 of the present invention.

In the picture:

1-first substrate; 2-thin film transistor; 3-liquid crystal; 41-red color film layer; 42-green color film layer; 43-blue color film layer; 5-black matrix; 6-second substrate; 7-WOLED Device; 81-green brightness-enhancing particles; 82-first blue brightness-enhancing particles; 83-second blue brightness-enhancing particles; 9-backlight.

Detailed ways

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the display panel and the display device of the present invention will be further described in detail below in conjunction with the drawings and specific embodiments.

A display panel, including a color filter unit and a light source, the color filter unit includes a black matrix and a color filter layer, the black matrix is distributed in a grid shape, and the area not covered by the black matrix forms a sub-pixel area, The color filter layer is arranged in the sub-pixel area, and the color filter layer is provided with light-enhancing particles, and the light-enhancing particles have a light component of the white light emitted by the light source that is different from the color of the color filter layer The excitation light emits the same color as the excitation light of the color filter layer, and the excitation light and the white light emitted by the light source can jointly exit the display panel after being filtered by the color filter layer.

A display device includes the above-mentioned display panel.

In the display panel, by adding different brightness-enhancing particles to the color filter layers of different colors in the color filter unit, through the light excitation of the brightness-enhancing particles, the light emitted by the light source is fully utilized to increase the light transmission of the sub-pixel area of the corresponding color. Increase the light transmittance of the display panel, and also improve the utilization rate of the light source (that is, improve the light efficiency), so that the brightness of the display panel increases.

Example 1:

This embodiment provides a display panel, which at least includes a color filter unit and a light source.

In this embodiment, as shown in FIG. 2 , the color filter unit includes a black matrix 5 and a color filter layer, and the black matrix 5 (Black Matrix, BM for short) is distributed in a grid shape, and the area not covered by the black matrix forms a subunit. In the pixel area (each sub-pixel area corresponds to a sub-pixel unit), the color filter layer is arranged in the sub-pixel area, and the color filter layer is provided with light-enhancing particles, which have the color of the white light emitted by the light source and the color of the color filter layer The excitation of different light components emits the shape of the excitation light with the same color as the color filter layer, and the excitation light and the white light emitted by the light source after the color filtering effect of the color filter layer can jointly exit the display panel, so that it is compatible with the color filter layer. The light transmittance (light emission amount) of the light of the same color of a layer increases. Among them, the sub-pixel units include red (R), green (G), and blue (B) sub-pixel units, and the black matrix 5 in the color filter unit is used to isolate the R, G, and B sub-pixel units, effectively reducing color crossing defects.

In this embodiment, the light-enhancing particle is a nano-scale luminescent particle, which can emit visible fluorescence after absorbing a certain energy and being excited. The luminescent spectrum can be controlled by changing the size of the light-enhancing particle, and its fluorescence intensity and stability are very good. Well, at the same time, it has high efficiency and narrow half-maximum width of the emission spectrum. It only needs to change the chemical composition of the light-enhancing particles or adjust the size of the light-enhancing particles to precisely control the excitation of different wavelengths of light, so as to obtain visible light of different colors. Preferably, the light-enhancing particles include CdS, CdSe, CdTe, ZnO, ZnS, ZnSe or ZnTe of II-VI groups, and GaAs, GaP, GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP of III-V groups. , InSb, AlAs, AlP or AlSb composed of nanoparticles.

Preferably, the brightness-enhancing particles adopt Molecular Beam Epitaxy (MBE for short), Metal-Organic Chemical Vapor Deposition (MOCVD for short), self-organized growth mode (Stranski-Kranstanov, S-K mode for short) or Colloid chemical method to form.

According to the half-peak width of the luminescence spectrum, the luminescence peak and the luminescence wavelength, the light of different colors can be obtained by adjusting the proportion of the light-enhancing particles of different materials, or by adjusting the proportion of the light-enhancing particles of different sizes. In this embodiment, the display panel includes three primary colors of R (red), G (green), and B (blue). As shown in FIG. 2 , the color filter layer in the color filter unit includes a red color filter layer 41, a green color filter layer 42 and the blue color film layer 43, the brightness-enhancing particles include green brightness-enhancing particles and blue brightness-enhancing particles. Among them, the red color film layer 41 is provided with green light-enhancing particles 81 and first blue light-enhancing particles 82, the green light-enhancing particles 81 emit red light when excited by the green light component, and the first blue light-enhancing particles 82 emit red light when excited by the blue light component. Red light; and/or, second blue light-enhancing particles 83 are arranged in the green color filter layer 42 , and the second blue light-enhancing particles 83 are excited by the blue light component to emit green light. That is, in the color filter unit of this embodiment, light-enhancing particles can be respectively arranged in the red color filter layer 41 and the green color filter layer 42, so that the output amount of red light and the output amount of green light can be increased; Any one of the red color film layer 41 or the green light color film layer 42 is provided with light-enhancing particles, so that either the output amount of red light or the output amount of green light is increased.

According to the definition of light transmittance, that is, the ratio of the amount of light emitted after passing through the color filter to the amount emitted by the light source, it can be known that, under the same amount of emitted light source, the amount of emitted red light and the amount of emitted green light in this embodiment are comparable. Compared with the prior art, the emission amount is increased, so both the red light transmittance and the green light transmittance are increased, which also increases the light transmittance of the display panel in this embodiment.

Through experiments and simulation tests, in the display panel of this embodiment, the particle size range of the green brightness-enhancing particles 81 is preferably 3.5-5.0 nm, the particle size range of the first blue brightness-enhancing particles 82 is 5.0-5.5 nm; the second blue brightness-enhancing particles 82 The particle diameter of the particles 83 is in the range of 3.0-3.5 nm. According to the color of the color filter layer, by adjusting the size of the brightness-enhancing particles, it is possible to control the wavelength of light emitted by the green light component or the blue light component in the white light, so as to obtain visible light of different colors.

As shown in FIG. 3 , the display panel includes a color filter substrate and an array substrate. The color filter substrate mainly includes a second substrate 6 and a color filter unit disposed above the second substrate 6, that is, the color filter substrate includes a second substrate 6, The black matrix 5 and the red color film layer 41 , the green color film layer 42 , and the blue color film layer 43 ; the array substrate mainly includes the first substrate 1 , the thin film transistor 2 and the WOLED device 7 arranged above the thin film transistor 2 . The display panel in this embodiment is a WOLED (White Organic Light Emitting Device, white organic light emitting diode) panel, that is, the light source in the display panel is light emitted by a white organic light emitting diode (WOLED device). OLED display panels have many advantages such as thinness, wide viewing angle, fast response speed, and high contrast ratio.

In this embodiment, the array substrate is the driving substrate, the color filter unit is arranged opposite to the driving substrate, and the thin film transistor 2 is arranged in the region corresponding to the driving substrate and the sub-pixel region, and the thin film transistor 2 is used to control whether the light source emits light.

Optionally, the thin film transistor (Thin Film Transistor: TFT for short) can be a-Si thin film transistor (a-Si TFT), oxide thin film transistor (oxideTFT), low temperature polysilicon thin film transistor (LTPS-TFT) or high temperature polysilicon thin film transistor Transistor (HTPS-TFT). The driving method for white organic light-emitting diodes (that is, WOLED device 7) can be a passive matrix (Passive Matrix Organic Light Emission Display, referred to as PMOLED) driving method and an active matrix (Active Matrix Organic Light Emission Display, referred to as AMOLED) driving method.

In terms of specific connections, the thin film transistor includes a gate, a source, and a drain. The light source is light emitted by a white organic light emitting diode. On the light emitting side of the white organic light emitting diode, the color filter unit allows the light emitted by the organic light emitting diode to selectively pass through the display panel. Wherein, the white organic light emitting diode at least includes an anode, a light emitting layer and a cathode, the light emitting layer is generally formed of organic materials, and the anode of the white light organic light emitting diode is electrically connected to the drain of the thin film transistor. .

In this embodiment, the light-enhancing particles of the display panel increase the light transmittance of light with the same color as the color film layer: when the white light emitted by the WOLED device passes through the color film unit, the green light in the red color film layer 41 The particle 81 is excited by the green light component to emit red light, and the first blue light-enhancing particle 82 is excited by the blue light component to emit red light. The color filter unit is injected to increase the output of red light, thereby achieving the effect of increasing the transmittance of red light; similarly, the second blue light-enhancing particles 83 in the green color filter layer 42 are excited by the blue light component to emit green light, The excitation light (that is, green light) emitted by stimulation and the green light converted by the green color film layer jointly exit the color film unit, increasing the amount of green light output, thereby achieving the effect of increasing the transmittance of green light; while the blue color film Since no light-enhancing particles are provided in the layer 43, only the blue light converted by the blue color filter layer exits the color filter unit. The red light, green light and blue light emitted from the color filter unit are mixed together to realize the full-color display of the display panel. Since both the red light output and the green light output include additional excitation light, compared with the red light output and the green light output in the prior art, the red light transmittance and the green light transmittance are both increased. Both are increased, which also increases the overall light transmittance of the display panel in this embodiment.

It can be seen that in the display panel of this embodiment, by adding different brightness-enhancing particles to the color filter layers of different colors of the color filter unit, through the photoexcitation of the brightness-enhancing particles, the light emitted by the white light organic light-emitting diode is fully utilized to increase the corresponding color. The light transmittance of the sub-pixel area increases, the light transmittance of the display panel is increased, and the utilization rate of the light source is also improved (that is, the light efficiency is improved), so that the brightness of the display panel is increased.

Example 2:

This embodiment provides a display panel, which is a liquid crystal display panel.

As shown in FIG. 4 , the display panel includes a color filter substrate and an array substrate. The color filter substrate mainly includes a second substrate 6 and a color filter unit disposed above the second substrate 6, that is, the color filter substrate includes a second substrate 6, The black matrix 5 and the red color film layer 41, the green color film layer 42, and the blue color film layer 43; the array substrate mainly includes a first substrate 1, a thin film transistor 2, and a pixel electrode (not shown in FIG. 4 ) arranged above the thin film transistor 2 A liquid crystal 3 (Liquid Crystal, LC for short) is arranged between the color filter substrate and the array substrate; the backlight source 9 is arranged on the side of the drive substrate away from the color filter unit, and the light-emitting surface of the LED lamp faces the drive substrate. Wherein, the light source is a backlight board provided with LED lamps, the backlight board is arranged on the side of the driving substrate away from the color filter unit, and the light-emitting surface of the LED lamp faces the driving substrate.

In this embodiment, the array substrate is the driving substrate, the color filter unit is arranged opposite to the driving substrate, and the thin film transistor 2 is arranged in the region corresponding to the driving substrate and the sub-pixel region, and the thin film transistor 2 is used to control whether the light emitted by the light source is directed to the color film layer. Wherein, the thin film transistor 2 includes a gate, a source and a drain, and a pixel electrode is provided in a region of the driving substrate corresponding to the sub-pixel region, and the pixel electrode is electrically connected to the drain of the thin film transistor.

In the display panel of this embodiment, the structure of the color filter unit is the same as that of the color filter unit in Embodiment 1, and the principle of increasing the light transmittance by the light-enhancing particles is also the same as that of Embodiment 1, which will not be repeated here.

In the display panel of this embodiment, by adding different brightness-enhancing particles to the color filter layers of different colors in the color filter unit, through the light excitation of the brightness-enhancing particles, the red light component (R) and green light component ( G) and the blue light component (B) are both effectively utilized, increasing the light transmittance of the sub-pixel area of the corresponding color, increasing the light transmittance of the display panel, and also improving the utilization rate of the light source (that is, improving the light efficiency), The brightness of the display panel is increased.

Example 3:

This embodiment provides a display device, which includes the display panel in Embodiment 1 or Embodiment 2.

The display device may be any product or component with a display function such as electronic paper, mobile phone, tablet computer, television, display device, notebook computer, digital photo frame, navigator, and the like.

Since the display panel in embodiment 1 or embodiment 2 has a higher light transmittance and greater brightness, the display effect of the display device using the corresponding display panel is also better.

It can be understood that, the above embodiments are only exemplary embodiments adopted to illustrate the principles of the present invention, but the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present utility model, and these variations and improvements are also regarded as the protection scope of the present utility model.

Claims (10)

1. A display panel, comprising a color filter unit and a light source, the color filter unit includes a black matrix and a color filter layer, the black matrix is distributed in a grid shape, and the area not covered by the black matrix forms sub-pixels area, the color filter layer is arranged in the sub-pixel area, and it is characterized in that, the color filter layer is provided with light-enhancing particles, and the light-enhancing particles have white light emitted by the light source and the color filter layer The excitation of light components of different colors emits the same color as the excitation light of the color filter layer, and the excitation light is in common The display panel is ejected. 2. The display panel according to claim 1, wherein the color film layer comprises a red color film layer, a green color film layer and a blue color film layer, and the brightness enhancement particles include green brightness enhancement particles and blue brightness enhancement particles , the green light-enhancing particles and the first blue light-enhancing particles are arranged in the red color film layer, the green light-enhancing particles are excited by the green light component to emit red light, and the first blue light-enhancing particles are stimulated by the blue light component Excited to emit red light; and/or, second blue light-enhancing particles are arranged in the green color filter layer, and the second blue light-enhancing particles are excited by the blue light component to emit green light. 3. The display panel according to claim 2, wherein the particle size range of the green brightness-enhancing particles is 3.5-5.0 nm, and the particle size range of the first blue brightness-enhancing particles is 5.0-5.5 nm; The particle size range of the second blue light-enhancing particles is 3.0-3.5 nm. 4. The display panel according to claim 1, wherein the light-enhancing particles include CdS, CdSe, CdTe, ZnO, ZnS, ZnSe or ZnTe of II-VI groups, and GaAs and GaP of III-V groups. , GaAs, GaSb, HgS, HgSe, HgTe, InAs, InP, InSb, AlAs, AlP or AlSb composed of nanoparticles. 5 . The display panel according to claim 4 , wherein the brightness-enhancing particles are formed by molecular beam epitaxy, metal-organic chemical vapor deposition, self-organized growth mode or colloidal chemical method. 6. The display panel according to any one of claims 1-5, wherein the display panel further comprises a driving substrate, the color filter unit is arranged opposite to the driving substrate, and the driving substrate and the The area corresponding to the sub-pixel area is provided with a thin film transistor, and the thin film transistor is used to control whether the light source emits light or whether the emitted light exits the color filter layer. 7. The display panel according to claim 6, wherein the thin film transistor is an a-Si thin film transistor, an oxide thin film transistor, a low temperature polysilicon thin film transistor or a high temperature polysilicon thin film transistor. 8. The display panel according to claim 6, wherein the thin film transistor comprises a gate, a source and a drain, the light source is light emitted by a white organic light emitting diode, and the white organic light emitting diode is arranged on In the area of the driving substrate corresponding to the sub-pixel area, the color filter unit is arranged on the light emitting side of the white organic light emitting diode, and the anode of the white organic light emitting diode is electrically connected to the drain of the thin film transistor . 9. The display panel according to claim 6, wherein the thin film transistor comprises a gate, a source and a drain, and the driving substrate is further provided with a pixel electrode in a region corresponding to the sub-pixel region, The pixel electrode is electrically connected to the drain of the thin film transistor; The light source is a backlight board provided with LED lamps, the backlight board is arranged on the side of the driving substrate away from the color filter unit, and the light-emitting surface of the LED lamp faces the driving substrate; The display panel further includes a liquid crystal disposed between the color filter unit and the driving substrate. 10. A display device, comprising the display panel according to any one of claims 1-9.