Display panel and display device

Abstract

The invention discloses a display panel and a display device, and belongs to the technical field of display. The display panel comprises a driving back plate, a light emitting device, a packaging layer and a liquid crystal dimming plate, the liquid crystal dimming plate is located on the side, away from the driving backboard, of the packaging layer and provided with a plurality of dimming units. The plurality of dimming units correspond to the plurality of light emitting devices. The liquid crystal dimming plate is arranged on one side of the light-emitting devices, the dimming units corresponding to the light-emitting devices are arranged on the liquid crystal dimming plate, and the dimming units can receive the light emitted by the light-emitting devices and adjust the brightness of the light, so that the brightness of the light emitted from the dimming units is improved, and the brightness of the light emitted from the dimming units is improved. The brightness of the light emitted by the light-emitting device is smaller than or equal to that of the light. Therefore, under the same gray scale, the two light emitting devices with the brightness difference can adjust the brightness of the light rays through the corresponding dimming units, and the brightness of the light rays emitted from the dimming units tends to be consistent or the difference is reduced.

Description

Technical Field

[0001] The present application relates to the field of display technology, and in particular to a display panel and a display device. Background Art

[0002] With the rapid development of display technology, the quality requirements for display panels are getting higher and higher. Among them, the brightness uniformity of display panels has become a major focus of consumers.

[0003] When the brightness uniformity of the display panel is poor, uneven color blocks or stripes will appear on the display panel, which is called mura in the industry. At present, the brightness uniformity of the display panel can usually be improved through brightness compensation methods such as voltage compensation, current compensation and digital drive compensation.

[0004] However, when the display panel displays a low grayscale image, the current brightness compensation method cannot effectively compensate the brightness of the display panel, resulting in a poor effect of the display panel when displaying the low grayscale image. Summary of the invention

[0005] The embodiments of the present application provide a display panel and a display device, which can solve the problem of insufficient brightness uniformity of the display panel in the prior art at low grayscale. The technical solution is as follows:

[0006] In one aspect, a display panel is provided, comprising: a driving backplane, a light-emitting device, a packaging layer and a liquid crystal dimming panel;

[0007] There are multiple light-emitting devices, and the multiple light-emitting devices are located on one side of the driving backplane and are all electrically connected to the driving backplane;

[0008] The encapsulation layer is located on a side of the plurality of light-emitting devices away from the driving backplane;

[0009] The liquid crystal dimming plate is located on a side of the encapsulation layer away from the driving backplane, and the liquid crystal dimming plate has a plurality of dimming units; the plurality of dimming units correspond to a plurality of the light-emitting devices, and the orthographic projections of the light-emitting devices on the driving backplane overlap with the orthographic projections of the corresponding dimming units on the driving backplane;

[0010] The dimming unit is configured to adjust the light emitted by the corresponding light emitting device so that the brightness of the light emitted by the dimming unit is less than or equal to the brightness of the light emitted by the light emitting device.

[0011] Optionally, the orthographic projection of the light-emitting device on the driving backplane is located within the orthographic projection of the corresponding dimming unit on the driving backplane.

[0012] Optionally, the liquid crystal dimming plate includes: an array substrate and a cover plate that are arranged opposite to each other, and a liquid crystal layer located between the array substrate and the cover plate; the array substrate is closer to the encapsulation layer than the cover plate.

[0013] Optionally, the array substrate comprises: a first substrate, and a plurality of pixel electrodes located on a side of the first substrate facing the liquid crystal layer;

[0014] The cover plate comprises: a second substrate, and a common electrode layer located on a side of the second substrate facing the liquid crystal layer;

[0015] Among them, the liquid crystal dimming panel has a plurality of dimming zones corresponding to the plurality of dimming units, the plurality of dimming zones correspond to the plurality of pixel electrodes, and the pixel electrodes are located in the corresponding dimming zones; one of the dimming units includes: the pixel electrode located in the corresponding dimming zone, and the portions of the liquid crystal layer and the common electrode layer located in the corresponding dimming zone.

[0016] Optionally, the array substrate further includes: a plurality of first transistors, wherein the plurality of first transistors are electrically connected to the plurality of pixel electrodes correspondingly.

[0017] Optionally, the liquid crystal dimming plate further includes: a first polarizing layer and a second polarizing layer;

[0018] The first polarizing layer is located on a side of the array substrate away from the liquid crystal layer;

[0019] The second polarizing layer is located on a side of the cover plate away from the liquid crystal layer.

[0020] Optionally, the display panel further comprises: a transparent adhesive layer;

[0021] The liquid crystal dimming plate is adhered to a side of the encapsulation layer away from the driving backplane through the transparent adhesive layer.

[0022] Optionally, the array substrate in the liquid crystal dimming panel has a first marking pattern, and the driving backplane has a second marking pattern;

[0023] The orthographic projection of the first marking pattern on the driving backplane overlaps with the area where the second marking pattern is located.

[0024] On the other hand, a display device is provided, comprising: a display panel, and a control component electrically connected to the display panel; the display panel is any of the display panels described above;

[0025] The control component is configured to: obtain grayscale information of the light-emitting device and compensation parameters corresponding to the light-emitting device; and control the transmittance of the corresponding dimming unit according to the grayscale information and compensation parameters of the light-emitting device.

[0026] Optionally, the control component is configured to: after determining that the grayscale value corresponding to the grayscale information of the light-emitting device is greater than a preset grayscale threshold, adjust the corresponding transmittance of the dimming unit to a maximum transmittance; after determining that the grayscale value corresponding to the grayscale information of the light-emitting device is not greater than the preset grayscale threshold, adjust the corresponding transmittance of the dimming unit to be less than or equal to the maximum transmittance.

[0027] The beneficial effects of the technical solution provided by the embodiment of the present application are:

[0028] By setting a liquid crystal dimming panel on one side of multiple light-emitting devices, the liquid crystal dimming panel has dimming units corresponding to the multiple light-emitting devices, and the dimming units can receive the light emitted by the light-emitting devices and adjust the brightness of the light, so that the brightness of the light emitted from the dimming unit is less than or equal to the brightness of the light emitted by the light-emitting devices. In this way, at the same grayscale, two light-emitting devices with different brightness can adjust the brightness of the light through the corresponding dimming units respectively, and the brightness of the light emitted from the dimming units tends to be consistent or the difference is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0030] Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application;

[0031] Figure 2 A schematic diagram of the structure of another display panel provided in an embodiment of the present application;

[0032] Figure 3 A schematic diagram of dimming a display panel provided in an embodiment of the present application;

[0033] Figure 4 Another schematic diagram of dimming the display panel provided in the embodiment of the present application;

[0034] Figure 5 A schematic diagram of the structure of a liquid crystal dimming panel provided in an embodiment of the present application;

[0035] Figure 6A schematic diagram of the structure of a display device provided in an embodiment of the present application;

[0036] Figure 7 A schematic diagram of brightness non-uniformity of a display panel provided in an embodiment of the present application and a comparative display panel before demura is performed;

[0037] Figure 8 A schematic diagram of brightness non-uniformity of a display panel provided in an embodiment of the present application and a comparative display panel after demura;

[0038] Fig. 9 A schematic diagram of brightness non-uniformity of a display panel after demura and dimming is provided in an embodiment of the present application. DETAILED DESCRIPTION

[0039] In order to make the objectives, technical solutions and advantages of the present application clearer, the implementation methods of the present application will be further described in detail below with reference to the accompanying drawings.

[0040] Thin Film Transistor (TFT) backplane technology is the basic and core technology of flat panel display industries such as Liquid Crystal Display (LCD) and Organic Light-emitting Diode (OLED). The core layer of the device is the active layer, and the main materials are amorphous silicon, low-temperature polysilicon, organic semiconductors and metal oxide semiconductors.

[0041] Due to the limitations of semiconductor processes, such as crystallization, thin film deposition, and patterning, the threshold voltage and electron mobility of TFTs at different locations in the same panel are not the same. In other words, there is a uniformity problem with TFTs in the same panel. Based on the uniformity problem of TFTs and the uniformity problem between each light-emitting device, there is a uniformity problem with the luminous brightness of light-emitting devices at different locations of the display panel.

[0042] At present, the mura phenomenon can be improved through internal compensation and external compensation. External compensation can be divided into optical extraction and electrical extraction according to different data extraction methods. Optical extraction refers to extracting the brightness signal through optical photography after the panel is lit, and compensation is performed based on the brightness signal, which is called demura in the industry.

[0043] When the display panel displays a low grayscale image, after demura processing, the display panel still has a poor effect in displaying the low grayscale image.

[0044] In an embodiment of the present application, a display panel 000 is provided. Figure 1 to Figure 2 , Figure 1 A schematic diagram of the structure of a display panel provided in an embodiment of the present application, Figure 2 A schematic diagram of another display panel structure provided by an embodiment of the present application: The display panel 000 may include: a driving backplane 100 , a light emitting device 200 , an encapsulation layer 300 and a liquid crystal dimming panel 400 .

[0045] There are multiple light emitting devices 200 , and the multiple light emitting devices 200 are located on one side of the driving backplane 100 and are all electrically connected to the driving backplane 100 .

[0046] The encapsulation layer 300 is located on a side of the plurality of light emitting devices 200 that is away from the driving backplane 100 .

[0047] The liquid crystal dimming plate 400 is located on the side of the encapsulation layer 300 away from the driving backplane 100, and the liquid crystal dimming plate 400 has a plurality of dimming units 400a; the plurality of dimming units 400a correspond to a plurality of light-emitting devices 200, and the orthographic projection of the light-emitting device 200 on the driving backplane 100 overlaps with the orthographic projection of the corresponding dimming unit 400a on the driving backplane 100.

[0048] The dimming unit 400 a is configured to adjust the light emitted by the corresponding light emitting device 200 so that the brightness of the light emitted by the dimming unit 400 a is less than or equal to the brightness of the light emitted by the light emitting device 200 .

[0049] For example, please refer to Figure 3 and Figure 4 , Figure 3 A schematic diagram of dimming a display panel provided in an embodiment of the present application, Figure 4 Another schematic diagram of dimming the display panel provided in the embodiment of the present application. Under the same grayscale, assuming that the standard brightness under the current grayscale is 100 nits (nit), the display panel 000 has at least two light-emitting devices 200 with different brightness. For example, the brightness of one light-emitting device 200 is 100 nits, and the brightness of the other light-emitting device 200 is 95 nits. The two light-emitting devices 200 respectively pass through the corresponding dimming units 400a, and the brightness of the light finally emitted by the dimming unit 400a can be adjusted to 90 nits. On this basis, please refer to Figure 4 , then current compensation or other methods can be used to increase the luminance of the two light-emitting devices 200 year on year, such as increasing the luminance of one light-emitting device 200 from 100 nits to 111 nits, and increasing the luminance of the other light-emitting device 200 from 95 nits to 106 nits. Finally, the brightness of the light emitted by the corresponding dimming unit 400a is adjusted to 100 nits, thereby achieving the standard brightness that needs to be displayed at this grayscale.

[0050] In summary, the embodiment of the present application sets a liquid crystal dimming panel on one side of a plurality of light-emitting devices, and the liquid crystal dimming panel has dimming units corresponding to the plurality of light-emitting devices, and the dimming units can receive the light emitted by the light-emitting devices and adjust the brightness of the light, so that the brightness of the light emitted from the dimming unit is less than or equal to the brightness of the light emitted by the light-emitting devices. In this way, at the same grayscale, two light-emitting devices with different brightness can adjust the brightness of the light through the corresponding dimming units respectively, and the brightness of the light emitted from the dimming units tends to be consistent or the difference is reduced.

[0051] For some possible implementations, see Figure 1 and Figure 2 , the orthographic projection of the light emitting device 200 on the driving backplane 100 is located within the orthographic projection of the corresponding dimming unit 400a on the driving backplane 100. In this way, the light emitted by a light emitting device 200 is incident on the corresponding dimming unit 400a.

[0052] Exemplarily, a plurality of light-emitting devices 200 may correspond to a plurality of dimming units 400a one to one, or one dimming unit 400a may correspond to a plurality of light-emitting devices 200. This is because TFT non-uniformity has a regional distribution, and the reasons are various, involving non-uniformity of thin film deposition, photolithography, doping, etc. during the manufacturing process. These factors usually lead to poor performance in certain areas of the display panel (such as edges, four corners, center, etc.), while other areas are relatively uniform. Therefore, the difference in the luminous brightness of two adjacent light-emitting devices 200 will not be very different. In this way, a dimming unit 400a can be used to adjust the light emitted by multiple adjacent light-emitting devices 200.

[0053] For some possible implementations, see Figure 2 and Figure 5 , Figure 5 The structural schematic diagram of the liquid crystal dimming plate provided in the embodiment of the present application, the liquid crystal dimming plate 400 may include: an array substrate 401 and a cover plate 403 arranged relatively to each other, and a liquid crystal layer 402 located between the array substrate 401 and the cover plate 403; the array substrate 401 is closer to the encapsulation layer 300 than the cover plate 403.

[0054] In the embodiment of the present application, the voltage applied to each dimming unit 400a in the liquid crystal layer 402 is adjusted by the array substrate 401, so that the arrangement direction of the liquid crystal in the dimming unit 400a can be changed, and finally the transmittance of the liquid crystal layer 402 can be adjusted. In this way, after the light emitted by the light-emitting device 200 passes through the corresponding dimming unit 400a, the brightness of the light can be reduced. Therefore, the light-emitting devices 200 with different brightness are adjusted by using different transmittances through the corresponding dimming unit 400a, so that the brightness of the light finally output by the multiple light-emitting devices 200 can be the same, or the difference is reduced.

[0055] For example, please refer to Figure 2 and Figure 5 The array substrate 401 may include: a first substrate 401 a , and a plurality of pixel electrodes 401 b located on a side of the first substrate 401 a facing the liquid crystal layer 402 .

[0056] The cover plate 403 may include: a second substrate 403 a , and a common electrode layer 403 b located on a side of the second substrate 403 a facing the liquid crystal layer 402 .

[0057] Among them, the liquid crystal dimming panel 400 has multiple dimming zones 400b corresponding to multiple dimming units 400a, and the multiple dimming zones 400b correspond to multiple pixel electrodes 401b, and the pixel electrodes 401b are located in the corresponding dimming zones 400b; a dimming unit 400a may include: a pixel electrode 401b located in the corresponding dimming zone 400b, and parts of the liquid crystal layer 402 and the common electrode layer 403b located in the corresponding dimming zone 400b.

[0058] Illustratively, in the embodiment of the present application, the voltage applied to the pixel electrode 401b of each dimming unit 400a is adjusted through the array substrate 401, so that the arrangement direction of the liquid crystal in the liquid crystal layer 402 of the dimming unit 400a can be changed, thereby achieving transmittance adjustment.

[0059] For some possible implementations, see Figure 5 The array substrate 401 may further include: a plurality of first transistors 401c, the plurality of first transistors 401c are electrically connected to the plurality of pixel electrodes 401b correspondingly, wherein the plurality of first transistors 401c are located on a side of the first substrate 401a away from the driving backplane 100.

[0060] Illustratively, a first transistor 401c may be electrically connected to a pixel electrode 401b, wherein a drain of the first transistor 401c is electrically connected to the pixel electrode 401b, and the first transistor 401c may be a thin film transistor.

[0061] For some possible implementations, see Figure 5 The liquid crystal dimming plate 400 may further include: a first polarizing layer 404 and a second polarizing layer 405 ; the first polarizing layer 404 is located on a side of the array substrate 401 away from the liquid crystal layer 402 ; the second polarizing layer 405 is located on a side of the cover plate 403 away from the liquid crystal layer 402 .

[0062] The polarization direction of the first polarizing layer 404 may be perpendicular to the polarization direction of the second polarizing layer 405 .

[0063] For example, after the non-polarized light emitted by the light emitting device 200 passes through the first polarizing layer 404, the emitted light is polarized light in a single direction. When there is no electric field, the liquid crystal molecules may be arranged in a twisted manner (for example, in some liquid crystal displays, the liquid crystal molecules may present a "twisted nematic" arrangement). This arrangement affects the propagation of light, causing the polarization direction of the light passing through the liquid crystal layer 402 to rotate.

[0064] When voltage is applied to the liquid crystal layer 402, the liquid crystal molecules will rearrange and gradually tend to be parallel to the direction of the electric field. This rearrangement will change the transmittance of the liquid crystal layer 402 to light. The closer the arrangement direction of the liquid crystal molecules is to the direction of polarized light, the higher the transmittance of light; on the contrary, if the arrangement direction of the liquid crystal is greatly different from the direction of polarized light, the light will be blocked.

[0065] The portion of the polarized light emitted from the liquid crystal layer 402 that matches the polarization direction of the second polarizing layer 405 is emitted through the second polarizing layer 405 .

[0066] For some possible implementations, see Figure 2 The display panel 000 may further include: a transparent adhesive layer 500 ; the liquid crystal dimming plate 400 is bonded to a side of the encapsulation layer 300 away from the driving backplane 100 through the transparent adhesive layer 500 .

[0067] Since the preparation of the array substrate 401 involves patterning processing, which may involve high temperature, strong light and other environments, in order to avoid the influence of these patterning processes on the performance of the light-emitting device 200, the embodiment of the present application can be to use an adhesive method to bond the prepared liquid crystal dimming plate 400 to the side of the encapsulation layer 300 away from the driving backplane 100.

[0068] Exemplarily, in order to ensure that the liquid crystal dimming plate 400 can be accurately bonded to the encapsulation layer 300 so that the light-emitting device 200 corresponds to the dimming unit 400a, in an embodiment of the present application, the array substrate 401 in the liquid crystal dimming plate 400 may have a first marking pattern, and the driving backplane 100 has a corresponding second marking pattern; wherein the orthographic projection of the first marking pattern on the driving backplane 100 overlaps with the area where the second marking pattern is located.

[0069] For example, a first marking pattern can be set on the opaque conductive layer in the array substrate 401, and a second marking pattern can be set on the opaque conductive layer in the driving backplane 100. By aligning the first marking pattern with the second adjustment pattern, the liquid crystal dimming panel 400 and the light-emitting device 200 can be aligned.

[0070] In the embodiment of the present application, the specific implementation of the driving backplane 100 and the light emitting device 200 is not limited. The encapsulation layer 300 may be a thin film encapsulation layer, and the light emitting device 200 may be an organic light emitting device. Figure 2 The driving backplane 100 may include: a third substrate 101, and a pixel driving circuit 102 formed on one side of the third substrate, the pixel driving circuit 102 at least includes: a second transistor 102a and a third transistor 102b, and the pixel driving circuit 102 may also include a storage capacitor. The second transistor 102a is electrically connected to the third transistor 102b, and the drain of one of the second transistor 102a and the third transistor 102b is electrically connected to the anode of the light emitting device 200.

[0071] Some structural layers of the liquid crystal dimming panel 400 are described below.

[0072] The materials of the first polarizing layer 404 and the second polarizing layer 405 can both be dichroic organic dyes. The materials of the pixel electrode 401b and the common electrode layer 403b can both be indium tin oxide (ITO). The material of the liquid crystal layer 402 can be a nematic liquid crystal with a chiral agent added. The materials of the first substrate 401a and the second substrate 403a can both be glass, polymer or organic glass.

[0073] In summary, the display panel provided in the embodiment of the present application may include: a driving backplane, a light-emitting device, an encapsulation layer, and a liquid crystal dimming panel. By setting a liquid crystal dimming panel on one side of a plurality of light-emitting devices, the liquid crystal dimming panel has dimming units corresponding to the plurality of light-emitting devices, and the dimming units can receive the light emitted by the light-emitting devices and adjust the brightness of the light so that the brightness of the light emitted from the dimming unit is less than or equal to the brightness of the light emitted by the light-emitting devices. In this way, at the same grayscale, two light-emitting devices with different brightness can adjust the brightness of the light through the corresponding dimming units respectively, and the brightness of the light emitted from the dimming units tends to be consistent or the difference is reduced.

[0074] The present application also provides a display device, please refer to Figure 6 , Figure 6 This is a schematic diagram of the structure of a display device provided in an embodiment of the present application. The display device may include: a display panel 000, and a control component 001 electrically connected to the display panel 000; the display panel 000 is the display panel 000 described in any of the above embodiments.

[0075] The control component 001 is configured to: obtain grayscale information of the light emitting device 200 and compensation parameters corresponding to the light emitting device 200; and control the transmittance of the corresponding dimming unit 400a according to the grayscale information and compensation parameters of the light emitting device 200.

[0076] In the embodiment of the present application, under different grayscale display images, the same light emitting device 200 may be provided with different compensation parameters, and the corresponding transmittance of the dimming unit 400a is also different, that is, the following dimming parameters are different.

[0077] In some possible implementations, corresponding to a grayscale that needs to be compensated, we can define it as a test grayscale. Before demura, it is necessary to determine the brightness non-uniformity of the display panel 000 at the test grayscale. At this time, the transmittance of each dimming unit 400a of the liquid crystal dimming plate 400 is adjusted to the highest, and the light-emitting device 200 emits light at a preset standard brightness at the test grayscale. The display panel 000 is imaged by a pixel-level industrial camera to determine the first brightness non-uniformity of the display panel 000 before demura.

[0078] In demura, the compensation parameters of each light emitting device 200 are determined according to the first brightness non-uniformity of the display panel 000. Subsequently, the transmittance of each dimming unit 400a of the liquid crystal dimming plate 400 is adjusted to the highest, and the light emitting device 200 emits light at a standard brightness according to the compensation parameters. The display panel 000 is imaged by a pixel-level industrial camera to determine the second brightness non-uniformity of the display panel 000 after demura.

[0079] In the dimming process, the dimming parameters of each dimming unit 400a are determined according to the second brightness non-uniformity of the display panel 000. The light emitting device 200 emits light at a standard brightness according to the compensation parameter, and each dimming unit 400a of the liquid crystal dimming plate 400 adjusts the transmittance of the liquid crystal layer 402 according to the dimming parameter. Subsequently, the display panel 000 can be imaged by a pixel-level industrial camera to determine the third brightness non-uniformity of the display panel 000 after the demura and dimming process.

[0080] It should be noted that, in the embodiment of the present application, the brightness non-uniformity can be the brightness difference between the sampling area and the comparison area, and the ratio of the brightness of the comparison area. Generally, the comparison area can be the central area of ​​the panel, and the sampling area is the surrounding area of ​​the panel.

[0081] Please refer to Figure 7 and Fig. 9 , Figure 7This is a schematic diagram of brightness non-uniformity of a display panel provided in an embodiment of the present application and a comparative display panel before demura is performed. Figure 8 This is a schematic diagram of brightness non-uniformity of the display panel provided in the embodiment of the present application and the comparative display panel after demura, Fig. 9 A schematic diagram of brightness non-uniformity of the display panel provided in the embodiment of the present application after demura and dimming. Based on the display panel 000 provided in the embodiment of the present application, the liquid crystal dimming plate 400 can be bonded to the side of the light-emitting device 200 away from the driving backplane 100. Therefore, the display panel without the liquid crystal dimming plate 400 bonded thereto can be used as a comparison display panel, and the brightness non-uniformity of the comparison display panel before and after demura can be measured as comparison data.

[0082] Please refer to Figure 7 , the first brightness non-uniformity of the comparative display panel in low grayscale display, such as 0-10 grayscale, is higher. However, the maximum transmittances of the dimming units 400a of the liquid crystal dimming plate 400 of the display panel 000 provided in the embodiment of the present application may also be different, that is, the liquid crystal dimming plate 400 also has a uniformity problem. Therefore, in the embodiment of the present application, the first brightness non-uniformity of the display panel 000 is the effect of the superposition of the uneven TFT in the driving backplane 100, the uneven light-emitting device 200 and the uneven liquid crystal dimming plate 400. Therefore, the first brightness non-uniformity of the display panel 000 provided in the embodiment of the present application is not the same as the first brightness non-uniformity of the comparative display panel.

[0083] Please refer to Figure 8 After demura processing, the second brightness non-uniformity of the display panel 000 provided by the embodiment of the present application and the comparison display panel is improved, but the second brightness non-uniformity at grayscale 0-10 is still poor, generally need to be less than 30%. It can be seen that even after demura processing, the effect of the display panel 000 when displaying low grayscale images is still poor.

[0084] Please refer to Fig. 9 After demura and dimming processing, Figure 8 Compared with the second brightness non-uniformity of the display panel, the third brightness non-uniformity of the display panel 000 provided in the embodiment of the present application is greatly improved, and can be reduced to 22% at the gray scale of 0-10.

[0085] In some possible implementations, the dimming of the liquid crystal dimming panel 400 can be for low grayscale (such as 0-100 grayscale) screen display, so dimming may not be required in some high grayscale display screens. In these embodiments, the control component 001 is configured to: after determining that the grayscale value corresponding to the grayscale information of the light-emitting device 200 is greater than the preset grayscale threshold, adjust the transmittance of the corresponding dimming unit 400a to the maximum transmittance; after determining that the grayscale value corresponding to the grayscale information of the light-emitting device 200 is not greater than the preset grayscale threshold, adjust the transmittance of the corresponding dimming unit 400a to be less than or equal to the maximum transmittance.

[0086] In the embodiment of the present application, the display device may be a display screen in a display device such as a mobile phone, a tablet computer, a laptop computer, a monitor, a smart TV, etc. The display device may also have the technical effects of the above-mentioned display panel 000, which will not be described again.

[0087] It should be noted that in the accompanying drawings, the sizes of layers and regions may be exaggerated for clarity of illustration. It is also understood that when an element or layer is referred to as being "on" another element or layer, it may be directly on the other element, or there may be an intermediate layer. In addition, it is understood that when an element or layer is referred to as being "under" another element or layer, it may be directly under the other element, or there may be more than one intermediate layer or element. In addition, it is also understood that when a layer or element is referred to as being "between" two layers or two elements, it may be the only layer between the two layers or two elements, or there may also be more than one intermediate layer or element. Similar reference numerals throughout the text indicate similar elements.

[0088] In the present application, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance. The term "plurality" refers to two or more than two, unless otherwise clearly defined.

[0089] The above description is only an optional embodiment of the present application and is not intended to limit the present application. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A display panel, characterized in that: include: Driving backplane, light-emitting device, encapsulation layer and liquid crystal dimming panel; There are multiple light-emitting devices, and the multiple light-emitting devices are located on one side of the driving backplane and are all electrically connected to the driving backplane; The encapsulation layer is located on a side of the plurality of light-emitting devices away from the driving backplane; The liquid crystal dimming plate is located on a side of the encapsulation layer away from the driving backplane, and the liquid crystal dimming plate has a plurality of dimming units; the plurality of dimming units correspond to a plurality of the light-emitting devices, and the orthographic projections of the light-emitting devices on the driving backplane overlap with the orthographic projections of the corresponding dimming units on the driving backplane; The dimming unit is configured to adjust the light emitted by the corresponding light emitting device so that the brightness of the light emitted by the dimming unit is less than or equal to the brightness of the light emitted by the light emitting device.

2. The display panel according to claim 1, characterized in that: The orthographic projection of the light emitting device on the driving backplane is located within the orthographic projection of the corresponding dimming unit on the driving backplane.

3. The display panel according to claim 1, characterized in that: The liquid crystal dimming panel comprises: an array substrate and a cover plate which are arranged opposite to each other, and a liquid crystal layer located between the array substrate and the cover plate; the array substrate is closer to the encapsulation layer than the cover plate.

4. The display panel according to claim 3, characterized in that: The array substrate comprises: a first substrate, and a plurality of pixel electrodes located on a side of the first substrate facing the liquid crystal layer; The cover plate comprises: a second substrate, and a common electrode layer located on a side of the second substrate facing the liquid crystal layer; Among them, the liquid crystal dimming panel has a plurality of dimming zones corresponding to the plurality of dimming units, the plurality of dimming zones correspond to the plurality of pixel electrodes, and the pixel electrodes are located in the corresponding dimming zones; one of the dimming units includes: the pixel electrode located in the corresponding dimming zone, and the portions of the liquid crystal layer and the common electrode layer located in the corresponding dimming zone.

5. The display panel according to claim 4, characterized in that: The array substrate further includes: a plurality of first transistors, and the plurality of first transistors are electrically connected to the plurality of pixel electrodes correspondingly.

6. The display panel according to any one of claims 3 to 5, characterized in that: The liquid crystal dimming plate further includes: a first polarizing layer and a second polarizing layer; The first polarizing layer is located on a side of the array substrate away from the liquid crystal layer; The second polarizing layer is located on a side of the cover plate away from the liquid crystal layer.

7. The display panel according to any one of claims 1 to 5, characterized in that: The display panel further includes: a transparent adhesive layer; The liquid crystal dimming plate is adhered to a side of the encapsulation layer away from the driving backplane through the transparent adhesive layer.

8. The display panel according to claim 7, characterized in that: The array substrate in the liquid crystal dimming panel has a first marking pattern, and the driving backplane has a second marking pattern; The orthographic projection of the first marking pattern on the driving backplane overlaps with the area where the second marking pattern is located.

9. A display device, characterized in that: include: A display panel, and a control component electrically connected to the display panel; The display panel is the display panel according to any one of claims 1 to 8; The control component is configured to: obtain grayscale information of the light-emitting device and compensation parameters corresponding to the light-emitting device; and control the transmittance of the corresponding dimming unit according to the grayscale information and compensation parameters of the light-emitting device.

10. The display device according to claim 9, characterized in that: The control component is configured to: after determining that the grayscale value corresponding to the grayscale information of the light-emitting device is greater than a preset grayscale threshold, adjust the corresponding transmittance of the dimming unit to the maximum transmittance; after determining that the grayscale value corresponding to the grayscale information of the light-emitting device is not greater than the preset grayscale threshold, adjust the corresponding transmittance of the dimming unit to be less than or equal to the maximum transmittance.

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