CN114355666A - Light adjusting film, backlight module, display panel and display device - Google Patents
Light adjusting film, backlight module, display panel and display device Download PDFInfo
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- CN114355666A CN114355666A CN202111233945.4A CN202111233945A CN114355666A CN 114355666 A CN114355666 A CN 114355666A CN 202111233945 A CN202111233945 A CN 202111233945A CN 114355666 A CN114355666 A CN 114355666A
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Abstract
The application provides a pair of membrane of adjusting luminance, backlight unit, display panel and display device includes: the light-reflecting device comprises a first surface, a second surface and a packaging cavity arranged between the first surface and the second surface, wherein a plurality of light-reflecting particles are loaded in the packaging cavity; the second surface is configured to apply a voltage to the packaging cavity to enable the reflective particles in the packaging cavity to move relatively, so that the packaging cavity can adjust the light transmittance of light in the packaging cavity according to the movement of the reflective particles. According to the light-adjusting film packaging structure, voltage is applied to the packaging cavity through the second surface of the light-adjusting film, so that the distance between the light-reflecting particles in the packaging cavity can be adjusted according to different voltage differences, when the voltage is large, the distance between the light-reflecting particles is small, and light rays are difficult to pass through; when the voltage is small, the distance between the reflective particles is large, and light can pass through the reflective particles easily. Therefore, the transmittance of the light passing through the packaging cavity can be adjusted, and the possibility of realizing local dimming is provided by a scheme with lower cost.
Description
Technical Field
The application relates to the technical field of display, in particular to a light modulation film, a backlight module, a display panel and a display device.
Background
Compared with a common image, a High Dynamic Range (HDR) image can provide more Dynamic ranges and image details and better reflect visual effects in a human real environment, and therefore, the current display technology is developing towards High resolution, HDR and other aspects. In order to achieve high dynamic contrast and enrich image levels, a Local backlight adjustment technology (i.e., Local Dimming technology) is proposed for an HDR (Liquid Crystal Display) LCD.
However, the cost of the conventional backlight for implementing the Local light control function is high and the technology itself is not mature, so that a component capable of Local Dimming is required for the Local Dimming technology.
Disclosure of Invention
In view of the above, an object of the present application is to provide a light modulation film, a backlight module, a display panel and a display device.
In view of the above object, the present application provides a light adjusting film, including: the light-reflecting device comprises a first surface, a second surface and a packaging cavity arranged between the first surface and the second surface, wherein a plurality of light-reflecting particles are loaded in the packaging cavity; the second surface is configured to apply a voltage to the package cavity to enable the reflective particles in the package cavity to move relatively, so that the package cavity can adjust the light transmittance of light in the package cavity according to the movement of the reflective particles.
In some embodiments, the number of the package cavities is multiple, a plurality of wires are disposed in the second surface, and each wire corresponds to at least one of the package cavities, so that a voltage is applied to the package cavities through the wires.
In some embodiments, a side of the second surface facing the package cavity is opened with a through hole along the conductive line, and the conductive line is configured to be conductive and capable of forming a voltage difference with an external circuit through the through hole to apply a voltage to the package cavity.
In some embodiments, the second surface is made of an insulating material.
In some embodiments, each of the conductive wires is configured to apply different voltages to the package cavity corresponding to the conductive wire independently, so that different package cavities have different light transmittance.
In some embodiments, the second surface is divided into at least a first region and a second region, and the first region and the second region are respectively provided with a plurality of wires.
In some embodiments, when a first voltage is applied to a first conducting wire corresponding to the first region and a second voltage is applied to a second conducting wire corresponding to the second region, the first voltage is greater than the second voltage; the light transmittance of the packaging cavity corresponding to the first area is smaller than that of the packaging cavity corresponding to the second area.
In some embodiments, the packaging cavity is filled with adhesive glue;
the packaging cavity is further configured to enable the light reflecting particles to be adhered to each other through the adhesive glue when the voltage is not applied.
In some embodiments, the light reflecting particles are polyethylene particles or polymethylmethacrylate particles.
Based on the same concept, the application also provides a backlight module which comprises the light modulation film.
Based on the same concept, the application also provides a display panel, which comprises an array substrate and the backlight module.
In some embodiments, the array substrate is provided with an electrode layer, the second surface of the light modulation film of the backlight module is provided with a plurality of wires, and a voltage for controlling relative movement between the light reflecting particles in the package cavity is formed between the wires and the electrode layer.
Based on the same concept, the application also provides a display device comprising the display panel.
From the above, it can be seen that the application provides a membrane of adjusting luminance, backlight unit, display panel and display device includes: the light-reflecting device comprises a first surface, a second surface and a packaging cavity arranged between the first surface and the second surface, wherein a plurality of light-reflecting particles are loaded in the packaging cavity; the second surface is configured to apply a voltage to the packaging cavity to enable the reflective particles in the packaging cavity to move relatively, so that the packaging cavity can adjust the light transmittance of light in the packaging cavity according to the movement of the reflective particles. According to the light-adjusting film packaging structure, voltage is applied to the packaging cavity through the second surface of the light-adjusting film, so that the distance between the light-reflecting particles in the packaging cavity can be adjusted according to different voltage differences, when the voltage is large, the distance between the light-reflecting particles is small, and light rays are difficult to pass through; when the voltage is small, the distance between the reflective particles is large, and light can pass through the reflective particles easily. Therefore, the transmittance of the light passing through the packaging cavity can be adjusted, and the possibility of realizing local dimming is provided by a scheme with lower cost.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments or related technologies, the drawings needed to be used in the description of the embodiments or related technologies are briefly introduced below, it is obvious that the drawings in the following description are only the embodiments of the present application, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic cross-sectional structure diagram of a light modulation film according to an embodiment of the present disclosure;
fig. 2 is a schematic structural diagram of a light-adjusting film according to an embodiment of the present disclosure in a state where light-reflecting particles are gathered;
fig. 3 is a schematic structural diagram of a light modulation film according to an embodiment of the present disclosure in a scattering state of light reflective particles;
fig. 4 is a schematic top view of a second surface of a light adjusting film according to an embodiment of the present disclosure;
fig. 5 is a schematic structural diagram of a light modulation film provided in an embodiment of the present application under the action of an external circuit;
fig. 6 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure.
Description of reference numerals:
1 a first surface; 2 a second surface; 21 a lead; 22 out of the hole; 3 packaging the cavity; 4 light-reflecting particles; 5 an external circuit; 100 array substrate; 200 a backlight module; 201 a backlight source; 202 a light guide plate; 203 a reflective sheet; 204 a diffusion layer; 205 a light-enhancing layer; 206 dimming film.
Detailed Description
To make the objects, technical solutions and advantages of the present specification more apparent, the present specification is further described in detail below with reference to the accompanying drawings in combination with specific embodiments.
It should be noted that technical terms or scientific terms used in the embodiments of the present application should have a general meaning as understood by those having ordinary skill in the art to which the present application belongs, unless otherwise defined. The use of "first," "second," and similar terms in the embodiments of the present application do not denote any order, quantity, or importance, but rather the terms are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that a element, article, or method step that precedes the word, and includes the element, article, or method step that follows the word, and equivalents thereof, does not exclude other elements, articles, or method steps. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
As described in the background section, a backlight Unit (BLU) with a direct-type structure is generally used in an existing HDR Liquid Crystal Display (LCD), and the brightness of Light Emitting Diodes (LEDs) in different areas of the BLU is controlled to adjust the contrast between the Local Dimming technology and the darkest area of the image (i.e., to achieve a high gray scale contrast), so as to achieve a high dynamic contrast of the LCD and enrich the image levels. Local Dimming means Local backlight adjustment, in one embodiment, by using a backlight composed of hundreds of LEDs to replace a Cold Cathode Fluorescent Lamp (CCFL) backlight, the backlight LEDs can be adjusted according to the brightness of the image, the brightness of the highlighted portion in the display screen image can be maximized, and the dark portion can be reduced in brightness or even turned off to achieve the best contrast. Thus, the reduction in the brightness of the dark area reduces the power consumption of the backlight.
However, in order to realize Local Dimming, the MiniLED technology must be used, but the MiniLED itself has high manufacturing cost and an immature mass transfer technology, which are difficult to find a good solution at the present stage, and therefore, a Local Dimming component with low cost and mass production is required to realize the Local Dimming technology or the Local Dimming technology in stages.
In combination with the above practical situation, the embodiment of the application provides a light modulation film, a voltage is applied to a packaging cavity through a second surface of the light modulation film, so that the distance between the reflective particles in the packaging cavity can be adjusted according to different voltage differences, the distance between the reflective particles is smaller when the voltage is small, and light rays are difficult to pass through; when the voltage is large, the distance between the reflective particles is large, and light can pass through the reflective particles easily. Therefore, the transmittance of the light passing through the packaging cavity can be adjusted, and the possibility of realizing local dimming is provided by a scheme with lower cost.
As shown in fig. 1, a schematic cross-sectional structure of a light adjusting film includes: the light-reflecting structure comprises a first surface 1, a second surface 2 and a packaging cavity 3 arranged between the first surface 1 and the second surface 2, wherein a plurality of light-reflecting particles 4 are loaded in the packaging cavity 3; the second surface 2 is configured to apply a voltage to the package cavity 3, so that the reflective particles 4 in the package cavity 3 relatively move, and the package cavity 3 can adjust the light transmittance of the light in the package cavity 3 according to the movement of the reflective particles 4.
In this embodiment, the first surface 1 and the second surface 2 are two-layer film layer structures that form the upper and lower surfaces of the light modulation film, and since the light modulation film is made of a transparent material, the light modulation film can be set to different colors, such as blue, green, and red, according to the specific application. Then, the package cavity 3 is a transparent cavity structure capable of allowing light to pass through smoothly, and may be a spherical cavity or a rectangular cavity, etc. A plurality of reflective particles 4 are packaged in the packaging cavity 3, the reflective particles 4 can reflect or refract light, and meanwhile, the distance between the reflective particles 4 can be changed due to the size of an applied electromagnetic field, the stronger the electromagnetic field (the larger the voltage), the smaller the distance between the reflective particles 4 until the reflective particles are attached to each other, and conversely, the weaker the electromagnetic field (the smaller the voltage), the larger the distance between the reflective particles 4. The shapes of the reflective particles under different voltages are shown in fig. 2 and fig. 3, irregular line segments in the two drawings are the schematic of light, as shown in fig. 2, the reflective particles 4 in the packaging cavity 3 are in a gathering state under high voltage, the light coming from the lower side of the second surface 2 can touch the reflective particles 4 gathered together with high probability, and then the light can not penetrate through the area where the packaging cavity is located due to reflection, so that the light-adjusting film can block the penetration of the light. As shown in fig. 3, under a small voltage or no voltage, the reflective particles 4 in the package cavity 3 are in a dispersed state, and the light from the lower side of the second surface 2 can penetrate through the dispersed reflective particles 4 with a high probability, so that the probability of reflection of the light at the package cavity 3 is reduced, and the light transmittance of the light adjusting film is improved. And then can adjust the light transmittance of membrane of adjusting luminance through the voltage that control encapsulation cavity 3 department received to make the membrane of adjusting luminance have the function of adjusting luminance. Then, the light modulation film of the present embodiment applies a voltage to the package cavity 3 through the second surface 2. In a concrete application scene, the light transmissivity ratio is poor under the circumstances of circular telegram to the membrane of adjusting luminance of this embodiment, can lead to 2 one sides of second surface light transmissivity to reduce to make luminance reduce about 50%, and luminance promotes more than 85% under the circumstances that does not have weak current, can realize different luminance of different demands like this, can realize the local dimming of certain circumstances.
In one embodiment, in order to realize local dimming, a plurality of dimming films may be provided at a position where local dimming is required, each dimming film may be independently applied with a voltage, and further, local dimming may be realized by applying different voltages to different dimming films; in another embodiment, the second surface 2 of the light modulation film can be divided into regions, each region can be applied with voltage independently, and local light modulation can be realized by different voltages applied to different regions.
In one embodiment, the motion state of the reflective particles 4 in the package cavity 3 can be simulated by placing a plurality of small balls in a basin, and the water surface is pressed by hands (simulating voltage intensity), the small balls in the basin can be concentrated in one area in the basin, and when the hands are removed from the water surface, the small balls in the basin can move and spread freely. Further, the case where the voltage is applied to the package chamber 3 again and the case where no voltage is applied to the package chamber 3 in this embodiment can be approximated.
As can be seen from the above, the present application provides a light adjusting film, including: the light-reflecting device comprises a first surface, a second surface and a packaging cavity arranged between the first surface and the second surface, wherein a plurality of light-reflecting particles are loaded in the packaging cavity; the second surface is configured to apply a voltage to the packaging cavity to enable the reflective particles in the packaging cavity to move relatively, so that the packaging cavity can adjust the light transmittance of light in the packaging cavity according to the movement of the reflective particles. According to the light-adjusting film packaging structure, voltage is applied to the packaging cavity through the second surface of the light-adjusting film, so that the distance between the light-reflecting particles in the packaging cavity can be adjusted according to different voltage differences, when the voltage is large, the distance between the light-reflecting particles is small, and light rays are difficult to pass through; when the voltage is small, the distance between the reflective particles is large, and light can pass through the reflective particles easily. Therefore, the transmittance of the light passing through the packaging cavity can be adjusted, and the possibility of realizing local dimming is provided by a scheme with lower cost.
In an alternative embodiment, as shown in fig. 1 and 4, the package cavities 3 are multiple, and a plurality of wires 21 are disposed in the second surface 2, where each wire 21 corresponds to at least one package cavity 3, so as to apply a voltage to the package cavities 3 through the wires 21. The voltage of one or a row of package cavities can be accurately controlled by the wires 21 in the second surface 2, thereby providing the possibility of local dimming in a smaller area.
The material of the conducting wire may be any material capable of conducting current, such as silver, copper, gold, aluminum, tungsten, etc. in metal materials. Then, in different embodiments, the second surface 2 may be a transparent conductive material, or a whole electrode layer or a plurality of side-by-side electrode layers may be disposed in the second surface 2, so as to transmit electric energy, thereby applying a voltage to the package cavity 3.
In an alternative embodiment, as shown in fig. 4 and 5, an exit hole 22 is opened along the wire 21 on a side of the second surface 2 facing the package cavity 3, and the wire 21 is configured to form a voltage difference with the external circuit 5 through the exit hole 22 when conducting, so as to apply a voltage to the package cavity 3. Thereby, through each exit hole 22, the voltage or electromagnetic field can be transmitted to the package cavity 3 without hindrance, thereby facilitating the control of the package cavity 3. Alternatively, in order that the adjacent wires 21 do not interfere with each other, the wires 21 may be spaced apart from each other as shown in fig. 4.
In another alternative embodiment, in order to concentrate the position of each conducting wire 21 from the voltage or electromagnetic field, the second surface 2 may be made of an insulating material at the position of the penetrating hole 22 on the conducting wire 21, i.e. the second surface 2 is made of an insulating material. For example, the material may be Polyethylene terephthalate (PET).
In an alternative embodiment, each conducting wire 21 is configured to apply different voltages to the package cavity 3 corresponding to the conducting wire 21 independently, so as to form different light transmittance for different package cavities 3. With this can control the encapsulation cavity with less unit to the messenger can more refine the adjustment of encapsulating cavity light transmittance, and then promotes the light contrast of whole membrane of adjusting luminance on the whole.
In the present embodiment, each conducting wire 21 may be controlled individually, or several conducting wires 21 may be divided into one group to perform group control (or the second surface may be divided into regions, and the conducting wires 21 in each region are divided into one group to perform region control). In a specific application scenario, as shown in fig. 4 and 5, in an application scenario of the display panel, the copper wires 21 in the second surface 2 made of PET are arranged along an extending direction of one side of the second surface, a voltage of each wire may be independently controlled by a Micro Controller Unit (MCU) and respectively connected to a corresponding Boost circuit (Boost), and then, the external circuit 5 may be an electrode layer on a Thin Film Transistor (TFT) substrate of the display panel, and the external circuit is a reference ground (0V) electrode, and the gathering and dispersion control of the reflective particles 4 in the package cavity 3 is realized through a pressure difference between the wires 21 and the TFT substrate. The system sends a picture to be displayed to a display Panel (Panel), the display Panel calculates the backlight brightness corresponding to each lead 21 according to the picture pixel information, and then the voltage on each lead 21 is controlled through the MCU and the Boost, so that the reflective particles 4 in each row of packaging cavities 3 are in aggregation states of different degrees, and the partition control of the backlight brightness is realized.
In an alternative embodiment, the second surface 2 is divided into at least a first area and a second area, and a plurality of wires 21 are respectively disposed in the first area and the second area. Thereby, local dimming is achieved by different control of the plurality of areas of the second surface 2. Under the existing conditions, the accuracy of human visual response is also limited, so that if each local dimming area is too small, for example, only one package cavity, the excessively fine contrast variation is not noticeable to human, and thus, the excessively fine control is essentially a waste of resources, and meanwhile, each wire is independently controlled, each wire needs to be provided with an independent control circuit, which greatly increases the cost. Furthermore, the second surface can be specifically divided according to a specific application scene, and local dimming is realized in a regional dimming manner. For example, several wires 21 are divided into one area for centralized control; alternatively, the wires 21 are made long enough, and each wire 21 is provided with a plurality of through holes 22 corresponding to the plurality of package cavities 3, so that the plurality of package cavities 3 corresponding to each wire are divided into one area, and the like.
In an optional embodiment, when a first voltage is applied to a first conducting wire corresponding to the first area and a second voltage is applied to a second conducting wire corresponding to the second area, the first voltage is greater than the second voltage; the light transmittance of the packaging cavity corresponding to the first area is smaller than that of the packaging cavity corresponding to the second area. Therefore, the light transmittance of the packaging cavity 3 in different areas can be adjusted by adjusting the voltage of the wires in different areas, so that the purpose of local dimming is achieved.
In an optional embodiment, the packaging cavity is filled with adhesive glue; and the packaging cavity is also configured to enable the light reflecting particles to be mutually bonded through the bonding glue when the voltage is not applied. Therefore, the gathering speed of the reflective particles 4 is accelerated by the adhesive glue, the reaction speed of the light transmittance from high to low is accelerated, and the stability of the reflective particles 4 in the gathering state is increased.
In an alternative embodiment, the light reflecting particles are polyethylene particles (PA particles) or polymethylmethacrylate particles (PMMA particles).
Based on the same concept, the present application further provides a backlight module including the light modulation film according to any one of the foregoing embodiments.
The backlight module of the above embodiment is used for applying the corresponding light modulation film in the above embodiment, and has the beneficial effects of the corresponding embodiment of the light modulation film, which are not described herein again.
Based on the same concept, the present application further provides a display panel, as shown in fig. 6, including an array substrate 100 and a backlight module 200 according to any of the foregoing embodiments.
In the present embodiment, as shown in fig. 6, the backlight module 200 generates light by a backlight 201 (typically, an LED), guides the light to the diffusion layer 204 through the light guide plate 202 and the reflective sheet 203, reaches the light adjusting film 206 of the previous embodiment through the diffusion layer 204 and the light enhancement layer 205, and finally reaches the array substrate 100 by adjusting the light of the light adjusting film 206.
In an alternative embodiment, the array substrate 100 is provided with an electrode layer (not shown), the second surface 2 of the light modulation film 206 of the backlight module 100 is provided with a plurality of wires 21, and a voltage for controlling the relative movement between the reflective particles 4 in the package cavity 3 is formed between the wires 21 and the electrode layer.
In the present embodiment, the electrode layer of the array substrate 100 is an external circuit in the foregoing embodiments.
The display panel of the above embodiment is used for applying the corresponding backlight module in the foregoing embodiment, and has the beneficial effects of the corresponding embodiment of the backlight module, which are not described herein again.
Based on the same concept, the present application further provides a display device comprising the display panel according to any one of the foregoing embodiments.
The display device of the above embodiment is used to apply the corresponding display panel in the foregoing embodiments, and has the beneficial effects of the corresponding display panel embodiment, which are not described herein again.
Those of ordinary skill in the art will understand that: the discussion of any embodiment above is meant to be exemplary only, and is not intended to intimate that the scope of the disclosure, including the claims, is limited to these examples; within the context of the present application, features from the above embodiments or from different embodiments may also be combined, steps may be implemented in any order, and there are many other variations of the different aspects of the embodiments of the present application as described above, which are not provided in detail for the sake of brevity.
In addition, well-known power/ground connections to Integrated Circuit (IC) chips and other components may or may not be shown in the provided figures for simplicity of illustration and discussion, and so as not to obscure the embodiments of the application. Furthermore, devices may be shown in block diagram form in order to avoid obscuring embodiments of the application, and this also takes into account the fact that specifics with respect to implementation of such block diagram devices are highly dependent upon the platform within which the embodiments of the application are to be implemented (i.e., specifics should be well within purview of one skilled in the art). Where specific details (e.g., circuits) are set forth in order to describe example embodiments of the application, it should be apparent to one skilled in the art that the embodiments of the application can be practiced without, or with variation of, these specific details. Accordingly, the description is to be regarded as illustrative instead of restrictive.
While the present application has been described in conjunction with specific embodiments thereof, many alternatives, modifications, and variations of these embodiments will be apparent to those of ordinary skill in the art in light of the foregoing description. For example, other memory architectures (e.g., dynamic ram (dram)) may use the discussed embodiments.
The present embodiments are intended to embrace all such alternatives, modifications and variances which fall within the broad scope of the appended claims. Therefore, any omissions, modifications, substitutions, improvements, and the like that may be made without departing from the spirit and principles of the embodiments of the present application are intended to be included within the scope of the present application.
Claims (13)
1. A light adjusting film, comprising: the light-reflecting device comprises a first surface, a second surface and a packaging cavity arranged between the first surface and the second surface, wherein a plurality of light-reflecting particles are loaded in the packaging cavity; the second surface is configured to apply a voltage to the package cavity to enable the reflective particles in the package cavity to move relatively, so that the package cavity can adjust the light transmittance of light in the package cavity according to the movement of the reflective particles.
2. The light adjusting film according to claim 1, wherein the number of the package cavities is plural, and a plurality of wires are disposed in the second surface, and each of the wires corresponds to at least one of the package cavities, so as to apply a voltage to the package cavity through the wire.
3. The light adjusting film according to claim 2, wherein an exit hole is formed along the wire on a side of the second surface facing the package cavity, and the wire is configured to form a voltage difference with an external circuit through the exit hole when conducting, so as to apply a voltage to the package cavity.
4. The light adjusting film according to claim 3, wherein the second surface is made of an insulating material.
5. The light adjusting film according to claim 2, wherein each of the conductive lines is configured to apply different voltages to the package cavities corresponding to the conductive line independently from each other, so that different package cavities have different light transmittance.
6. The light adjusting film according to claim 5, wherein the second surface is divided into at least a first region and a second region, and a plurality of the conductive lines are provided in each of the first region and the second region.
7. The light adjusting film according to claim 6, wherein when a first voltage is applied to a first wire corresponding to the first region and a second voltage is applied to a second wire corresponding to the second region, the first voltage is greater than the second voltage; the light transmittance of the packaging cavity corresponding to the first area is smaller than that of the packaging cavity corresponding to the second area.
8. The light adjusting film according to claim 1, wherein an adhesive glue is further filled in the package cavity;
the packaging cavity is further configured to enable the light reflecting particles to be adhered to each other through the adhesive glue when the voltage is not applied.
9. The light adjusting film according to claim 1, wherein the light reflecting particles are polyethylene particles or polymethyl methacrylate particles.
10. A backlight module comprising the light adjusting film according to any one of claims 1 to 9.
11. A display panel comprising an array substrate and the backlight module of claim 10.
12. The display panel of claim 11, wherein the array substrate is provided with an electrode layer, the second surface of the light modulation film of the backlight module is provided with a plurality of wires, and a voltage for controlling relative movement between the reflective particles in the package cavity is formed between the wires and the electrode layer.
13. A display device characterized by comprising the display panel according to claim 12.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202111233945.4A CN114355666A (en) | 2021-10-22 | 2021-10-22 | Light adjusting film, backlight module, display panel and display device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202111233945.4A CN114355666A (en) | 2021-10-22 | 2021-10-22 | Light adjusting film, backlight module, display panel and display device |
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| CN114355666A true CN114355666A (en) | 2022-04-15 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140293188A1 (en) * | 2013-04-01 | 2014-10-02 | Apple Inc. | Displays with Local Dimming Elements |
| CN109581748A (en) * | 2019-01-08 | 2019-04-05 | 合肥京东方光电科技有限公司 | Optical diaphragm and backlight module, display device |
| CN112445022A (en) * | 2019-08-29 | 2021-03-05 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
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2021
- 2021-10-22 CN CN202111233945.4A patent/CN114355666A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20140293188A1 (en) * | 2013-04-01 | 2014-10-02 | Apple Inc. | Displays with Local Dimming Elements |
| CN109581748A (en) * | 2019-01-08 | 2019-04-05 | 合肥京东方光电科技有限公司 | Optical diaphragm and backlight module, display device |
| CN112445022A (en) * | 2019-08-29 | 2021-03-05 | 京东方科技集团股份有限公司 | Liquid crystal display panel and display device |
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