Display panel and display device

Abstract

The application discloses a display panel and a display device. The display panel further comprises a substrate, a light-emitting unit layer, a pixel definition layer, an encapsulation layer, a color filter layer and a photochromic layer. The light-emitting unit layer is provided with a plurality of light-emitting units, the plurality of light-emitting units are arranged in an array on the substrate and located in the opening area; the pixel definition layer is arranged on the substrate and located in the non-opening area, and two adjacent light-emitting units are separated by the pixel definition layer; the encapsulation layer is arranged on the light-emitting unit and the pixel definition layer; the color filter layer is arranged on the encapsulation layer; the photochromic layer is arranged in the non-opening area and is switched from a first state to a second state after receiving light; the first state is a transparent state, and the second state is a non-transparent state; the photochromic layer is arranged to replace the black matrix, so that the display brightness of the display panel is improved.

Description

Technical Field

[0001] This application relates to the field of display technology, and more particularly to a display panel and a display device. Background Technology

[0002] With the continuous development of OLED (Organic Light-Emitting Diode) display technology, OLEDs are increasingly widely used in displays such as smartphones, tablets, computers, and televisions. OLED displays offer advantages such as thinness and lightness, high contrast, fast response, wide viewing angle, high brightness, and full color. To prevent screen reflections, OLED devices typically use circular polarizers, but these polarizers cause significant light loss. A new technology, represented by COE (Colorfilm on Encapsulation), has emerged as a replacement for polarizers, also known as POL-less technology. This technology uses color filters instead of polarizers, achieving a transmittance of up to 60%, significantly increasing light output brightness, thereby reducing power consumption and extending the lifespan of OLED devices. Color filter (R, G, B) components are deposited through a color filter process. To prevent color bleeding between different color filters, a black matrix (BM) is placed between different color filters to absorb colored light at the edges of the color filter. Different color filters are separated by the black matrix (BM).

[0003] While a black matrix can be used to block ambient light, it also affects the efficiency of light emission, potentially reducing the brightness of the display panel. Summary of the Invention

[0004] The purpose of this application is to provide a display panel and display device that improves the display brightness of the display panel by setting a photochromic layer to replace the black matrix.

[0005] This application discloses a display panel, including an open area and a non-open area. The display panel further includes a substrate, a light-emitting unit layer, a pixel definition layer, an encapsulation layer, a color filter layer, and a photochromic layer. The light-emitting unit layer is provided with a plurality of light-emitting units, which are arranged in an array on the substrate and located in the open area. The pixel definition layer is disposed on the substrate and located in the non-open area, with adjacent light-emitting units separated by the pixel definition layer. The encapsulation layer is disposed on the light-emitting units and the pixel definition layer. The color filter layer is disposed on the encapsulation layer. The photochromic layer is disposed in the non-open area and is used to switch from a first state to a second state after receiving light. The first state is a transparent state, and the second state is a non-transparent state.

[0006] Optionally, the color filter layer includes a plurality of color filter units, which are disposed in the opening area, and adjacent color filter units are separated by the photochromic layer; the photochromic layer is disposed in the same layer as the color filter units.

[0007] Optionally, the thickness of the color filter is greater than the thickness of the photochromic layer.

[0008] Optionally, the color filter portion is further provided with an extension portion in the direction of the photochromic layer, wherein the extension portion partially overlaps with the photochromic layer in the orthographic projection of the substrate; and the photochromic layer and the color filter portion do not overlap in the orthographic projection of the substrate.

[0009] Optionally, the extension is disposed on the photochromic layer; at each location of the non-opening region, the width of the extension is less than or equal to half the width of the photochromic layer; the extension includes a red extension, a green extension, and a blue extension, the red extension being disposed on at least one side of the red filter; the green extension being disposed on at least one side of the green filter; and the blue extension being disposed on at least one side of the blue filter.

[0010] Optionally, the extension is disposed below the photochromic layer and located on the encapsulation layer; the extension includes a red extension and a green extension; the color filter includes a blue filter, a red filter, and a green filter, wherein the red filter has a red extension on the side facing the photochromic layer, and the green filter has a green extension on the side facing the photochromic layer.

[0011] Optionally, the thickness of the extension is less than the thickness of the color filter portion, and / or the thickness of the extension is less than the thickness of the photochromic layer.

[0012] Optionally, the photochromic layer includes an organic photochromic material or an inorganic photochromic material. The organic photochromic material includes an organic material containing photochromic groups, and the inorganic photochromic material includes a material doped with inorganic color-changing particles.

[0013] Optionally, the display panel is a transparent display panel; the degree of opacity of the non-opaque state of the photochromic layer gradually increases with the increase of light intensity.

[0014] This application also discloses a display device, including a driving circuit and the aforementioned display panel, wherein the driving circuit is used to drive the display panel to display.

[0015] This application primarily utilizes a photochromic layer to replace the function of the black matrix. By placing the photochromic layer in the non-aperture area, when the photochromic layer receives light, it transitions from a transparent state to an opaque state, effectively blocking ambient light from entering. Furthermore, in low-light conditions, most of the photochromic layer will not transition to the second state unless it receives strong light. In this state, the photochromic layer's absorption of light emitted by the light-emitting units is weak, allowing more emitted light to escape and increasing the brightness of the display panel. Notably, in low-light environments, the photochromic layer remains transparent in non-light-emitting areas of the display panel, preventing light reflection caused by ambient light entering. In strong ambient light conditions, most of the photochromic layer transitions to the second state (opaque) upon receiving light, blocking or absorbing ambient light and preventing it from entering the display panel and causing light reflection. This allows the display panel to dynamically adjust its contrast based on varying ambient light intensities. This application utilizes a photochromic layer to replace the black matrix, thereby increasing the brightness of the display panel and enabling dynamic adjustment of the display contrast. Attached Figure Description

[0016] The accompanying drawings, which form part of the specification, are used to provide a further understanding of the embodiments of this application and illustrate the implementation methods of this application, together with the textual description, to explain the principles of this application. Obviously, the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any creative effort. In the drawings:

[0017] Figure 1 This is a schematic diagram of a first type of display panel according to the first embodiment of this application;

[0018] Figure 2 This is a schematic diagram of a second type of display panel according to the first embodiment of this application;

[0019] Figure 3 This is a schematic diagram of the display panel according to the second embodiment of this application;

[0020] Figure 4 This is a schematic diagram of the display panel according to the third embodiment of this application;

[0021] Figure 5 This is a schematic diagram of another display panel according to the third embodiment of this application;

[0022] Figure 6 This is a schematic diagram of the display device of this application.

[0023] Among them, 100 is a display panel; 101 is an opening area; 102 is a non-opening area; 110 is a substrate; 120 is a light-emitting unit; 121 is a bottom electrode; 122 is a light-emitting layer; 123 is a top electrode; 130 is a pixel definition layer; 140 is an encapsulation layer; 141 is a first inorganic layer; 142 is an organic layer; 143 is a second inorganic layer; 150 is a color filter layer; 160 is a color filter section; 160a is an extension section; 161 is a red filter section; 161a is a red extension section; 162 is a green filter section; 162a is a green extension section; 163 is a blue filter section; 163a is a blue extension section; 170 is a photochromic layer; 200 is a display device; and 210 is a driving circuit. Detailed Implementation

[0024] It should be understood that the terminology, specific structural and functional details used herein are merely for describing particular embodiments and are representative. However, this application may be implemented in many alternative forms and should not be construed as being limited to the embodiments set forth herein.

[0025] In the description of this application, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating relative importance or implying the number of technical features indicated. Therefore, unless otherwise stated, a feature specified as "first" or "second" may explicitly or implicitly include one or more of that feature; "multiple" means two or more. Furthermore, terms indicating orientation or positional relationships, such as "upper," "lower," "left," "right," "vertical," and "horizontal," are described based on the orientation or relative positional relationships shown in the accompanying drawings and are only for the purpose of simplifying the description of this application, not indicating that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0026] The present application will now be described in detail with reference to the accompanying drawings and optional embodiments.

[0027] Figure 1 This is a schematic diagram of a first type of display panel according to the first embodiment of this application. Figure 2 This is a schematic diagram of the second type of display panel according to the first embodiment of this application. See also: Figure 1-2As shown, this application discloses a display panel 100, which has an opening area 101 and a non-opening area 102. The display panel 100 further includes a substrate 110, a light-emitting unit layer, a pixel definition layer 130, an encapsulation layer 140, a color filter layer 150, and a photochromic layer 170. The light-emitting unit layer is provided with a plurality of light-emitting units 120, which are arranged in an array on the substrate 110 and located in the opening area 101. The pixel definition layer 130 is disposed on the substrate 110 and located in the non-opening area 102, with adjacent light-emitting units 120 separated by the pixel definition layer 130. The encapsulation layer 140 is disposed on the light-emitting units 120 and the pixel definition layer 130. The color filter layer 150 is disposed on the encapsulation layer 140. The photochromic layer 170 is disposed in the non-opening area 102 and is used to switch from a first state to a second state after receiving light. The first state is a transparent state, and the second state is a non-transparent state.

[0028] This application primarily utilizes a photochromic layer 170 to replace the function of the black matrix. By setting the photochromic layer 170 in the non-aperture area 102, when the photochromic layer 170 receives light, it transitions from a transparent state to an opaque state, effectively blocking ambient light from entering. Furthermore, in low ambient light conditions, most of the photochromic layer 170 will not transition to the second state when not receiving strong light. In this case, during display, the photochromic layer 170 has a weaker absorption capacity for light emitted from the light-emitting unit 120, allowing more emitted light to escape and increasing the brightness of the display panel 100. Notably, in low-light environments, the photochromic layer 170 remains transparent in the non-light-emitting areas of the display panel 100, preventing light reflection caused by ambient light entering. When ambient light is strong, most of the photochromic layer 170 changes to a second state after receiving light, becoming opaque. This blocks or absorbs ambient light, preventing it from entering the display panel 100 and causing light reflection. This allows the display panel 100 to dynamically adjust its contrast based on varying ambient light intensities. This application utilizes the photochromic layer 170 to replace the black matrix, thereby increasing the brightness of the display panel 100 and enabling dynamic adjustment of display contrast.

[0029] Specifically, the photochromic layer 170 is mainly formed of photochromic materials, which can be either organic or inorganic. Their main principle is the same: when the photochromic material receives energy from light, its molecular structure changes, making the material opaque. After the light is removed, the molecular structure of the photochromic material recovers, restoring its transparent state. The transition and recovery process from the first state to the second state is reversible and cyclical.

[0030] The photochromic layer 170 is formed using organic or inorganic photochromic materials. The organic photochromic material includes organic materials containing photochromic groups, and the inorganic photochromic material includes materials doped with inorganic photochromic particles. The photochromic groups in the organic photochromic material may include photosensitive photochromic groups such as spirooxazine, spiropyran, fumonisin anhydride, diarylethene, and thiophene.

[0031] This application uses inorganic photochromic materials as examples of halides, such as silver chloride (AgCl), silver bromide (AgBr), or mixtures of two or more of these silver halides. When light shines into such materials, ultraviolet light reduces silver chloride or silver bromide to silver metal and halide ions, causing the photochromic material to absorb light and darken, transitioning to a non-transparent state. When the excitation light source is removed, the photochromic material undergoes a reversible reaction, regaining its transparent color.

[0032] Specifically, the display panel 100 in this embodiment can be a transparent display panel 100. The difference between a transparent display panel 100 and a regular display panel 100 is that when the display panel 100 is not displaying anything, light can pass through it, allowing objects behind it to be seen. The specific manufacturing process involves increasing the transparency of the regular display panel 100, making it completely transparent when not displaying anything. For example, regarding the transparent display panel 100, this application replaces the black matrix with a photochromic layer 170, so that in low ambient light conditions, most of the photochromic layer 170 is transparent, resulting in better light transmittance and improved quality when the display panel 100 is not displaying anything. On the one hand, it enhances the brightness and contrast of the transparent display panel 100 in the dark state. On the other hand, it enables the photochromic layer 170 of the transparent display panel 100 to transform into a non-transparent state even under strong ambient light, thereby reflecting and absorbing ambient light, improving the display effect of the display panel 100 under strong light, and enhancing the contrast.

[0033] Specifically, the opacity of the photochromic layer 170 in its opaque state gradually increases with increasing light intensity. In this embodiment, when the photochromic layer 170 is in its second state, i.e., its opaque state, the opacity of the photochromic layer 170 gradually increases with increasing light intensity. For example, when the ambient light intensity gradually increases, L0 < L1 < L2, where L0 corresponds to a transparent state, L1 corresponds to a semi-transparent state, and L2 corresponds to an opaque state. The specific relationship between ambient light intensity and the transparency of the photochromic layer 170 can be designed according to actual conditions.

[0034] The light-emitting unit 120 generally includes a bottom electrode 121, a light-emitting layer 122, and a top electrode 123. Different colored light-emitting units 120 emit different colors, mainly due to the different materials of the light-emitting layer 122. It is worth noting that the light emitted by the light-emitting units 120 within the display panel 100 also excites the photochromic layer 170 to transition from a first state to a second state. However, because the brightness of the light-emitting units 120 within the display panel 100 is relatively low, the impact on the photochromic layer 170 is minimal. Nevertheless, some blue light emitted by the blue light-emitting units 120, or light with higher brightness, can directly excite the photochromic layer 170 to transition from the first state to the second state, making the photochromic layer 170 opaque and blocking the light mixing position of the adjacent color filter section 160, thus reducing the occurrence of light mixing problems.

[0035] In another embodiment, when the photochromic layer 170 is made of, for example, silver chloride (AgCl), silver bromide (AgBr), or a mixture of both or more silver halides, the excitation wavelength of the photochromic layer 170 will also be different. For example, when the photochromic layer 170 is silver chloride, the excitation wavelength is 400-430 nm; when the photochromic layer 170 is silver bromide, the excitation wavelength is 460-490 nm; and when a mixture of silver chloride and silver bromide is selected, the excitation wavelength can exceed 500 nm. Therefore, the specific laser wavelength can be selected according to the actual situation, and a suitable excitation wavelength can be obtained by mixing various halides.

[0036] Specifically, the substrate 110 can generally be a flexible substrate 110 or a glass substrate 110. A driving layer is formed on the substrate 110, which is used to drive the array of light-emitting units 120 to emit light. The driving layer generally has a pixel driving circuit, which is implemented by multiple thin-film transistors and wiring. A light-emitting unit layer is provided on the driving layer. The multiple arrayed light-emitting units 120 in the light-emitting unit layer generally include a bottom electrode, a light-emitting layer, and a top electrode. The bottom electrode is connected to the driving layer, and the driving layer provides different data signals to achieve different brightness levels for different light-emitting units 120.

[0037] An encapsulation layer 140 may also be provided on the light-emitting unit layer. The specific encapsulation method may adopt thin film encapsulation technology, that is, the encapsulation layer 140 adopts a multi-layer stack of inorganic and organic layers. By using the stack of inorganic and organic layers, the light-emitting unit layer is sealed. For example, the encapsulation layer 140 includes a first inorganic layer 141, an organic layer 142, and a second inorganic layer 143.

[0038] In this embodiment, a color filter is also provided on the encapsulation layer 140 to replace the polarizer. The color filter can be formed in the display panel 100 in various ways. For example, the color filter layer 150 can be formed directly on the encapsulation layer 140 by thin film process, or an encapsulation glass can be formed on the opposite side of the substrate 110. After the color filter layer 150 is formed on the side of the encapsulation glass close to the substrate 110, the encapsulation glass is bonded to the opposite side of the substrate 110 to form the display panel 100. The specific process and structure are not limited here.

[0039] Specifically, the color filter layer 150 generally includes multiple color filter sections 160, each with a different color, such as a red filter section 161, a blue filter section 163, and a green filter section 162. The color filter sections 160 are disposed within the opening area 101, and adjacent color filter sections 160 are separated by the photochromic layer 170. The photochromic layer 170 is disposed on the same layer as the color filter sections 160, and the photochromic layer 170 has multiple openings corresponding to the opening area 101, with the multiple color filter sections 160 located within their respective openings.

[0040] In this embodiment, the color filter 160 and the photochromic layer 170 are disposed on the same layer. During the manufacturing process, the photochromic layer 170 can be formed first and then patterned, forming multiple openings corresponding to the opening area 101. After the photochromic layer 170 is formed, the color filter 160 is manufactured at the corresponding opening positions. In this embodiment, the photochromic layer 170 and the color filter 160 are disposed on the same layer, without changing the thickness and manufacturing process of the original color filter, thus reducing the cost of adaptive modifications required for the display panel 100.

[0041] In one embodiment, the thickness of the color filter 160 is equal to the thickness of the photochromic layer 170. In this embodiment, the thickness of the photochromic layer 170 can be appropriately increased to enhance the opacity of the photochromic layer 170 in its second state under strong light, resulting in a greater thickness of the photochromic layer 170 and thus a stronger light-blocking effect. In another embodiment, the thickness of the color filter 160 is greater than the thickness of the photochromic layer 170. Relatively speaking, the thickness of the photochromic layer 170 does not need to be particularly thick. When the thickness of the photochromic layer 170 reaches a certain level, it already has a good light-blocking and absorption effect when in its second state.

[0042] Figure 3 This is a schematic diagram of the display panel according to the second embodiment of this application. See also: Figure 3The present application also discloses a display panel 100, which differs from the display panel 100 in the above embodiment 1 in that the present application provides an extension 160a around the color filter 160, and the extension 160a partially overlaps with the photochromic layer 170. This method can further improve the contrast of the display panel 100.

[0043] Specifically, the color filter portion 160 is further provided with an extension portion 160a in the direction of the photochromic layer 170, and the extension portion 160a partially overlaps with the photochromic layer 170 in the orthographic projection of the substrate 110.

[0044] In this solution, by utilizing the color filter 160, which extends above or below the photochromic layer 170, when some light passes through the photochromic layer 170, the extension 160a below filters most of the light, reducing ambient light entering the display panel 100. Furthermore, when the display panel 100 is in normal operation, although some light is blocked by the photochromic layer 170 due to the limited light intensity emitted by the display panel 100, some light can still directly exit from the photochromic layer 170 in dark conditions, thus improving the brightness of the display panel 100. Of course, in strong light environments, since the extension 160a and the photochromic layer 170 respectively filter and block light, the photochromic layer 170's ability to block ambient light is enhanced, improving the contrast of the display panel 100 under strong light. In dark environments, since the photochromic layer 170 is mainly transparent, ambient light is negligible. Some of the emitted light passes through the extension 160a and is emitted, which can increase the effective light-emitting area of ​​the sub-pixels of the display panel 100 and improve the display effect of the display panel 100.

[0045] Specifically, the extension 160a includes a red extension 161a, a green extension 162a, and a blue extension 163a. ​​The red extension 161a is disposed on at least one side of the red filter 161; the green extension 162a is disposed on at least one side of the green filter 162; and the blue extension 163a is disposed on at least one side of the blue filter 163.

[0046] On the photochromic layer 170, the extension 160a near the red filter 161 is red, the extension 160a near the green filter 162 is green, and the extension 160a near the blue filter 163 extends to blue. In other words, in each opening region 101, blue extensions 163a are provided around the blue filter 163, red extensions 161a are provided around the red filter 161, and green extensions 162a are provided around the green filter 162.

[0047] The length of the extension 160a should not be too long. Generally, the total area of ​​the extension 160a on the photochromic layer 170 in the orthographic projection of the substrate 110 in a non-opening region 102 does not exceed half of the photochromic layer 170. Furthermore, at each location of the non-opening region 102, the width of the extension 160a is less than or equal to half the width of the photochromic layer 170.

[0048] In another embodiment, the extension 160a may be provided only at the location of the blue filter portion 163, that is, the blue filter portion 163 may be provided only around the blue filter portion 163, in order to increase the light-emitting area of ​​the blue sub-pixel, thereby improving the phenomenon of insufficient lifespan of the blue sub-pixel of the OLED display panel 100.

[0049] Specifically, the extension 160a is disposed on the photochromic layer 170; the thickness of the extension 160a is less than the thickness of the color filter 160, or the thickness of the extension 160a is less than the thickness of the photochromic layer 170. In this solution, the thickness of the extension 160a does not need to be as large as that of the color filter 160; it only needs to filter a portion of the light. Under strong ambient light, it can work together with the photochromic layer 170 to prevent ambient light from entering the display panel 100.

[0050] Specifically, the sum of the thicknesses of the photochromic layer 170 and the extension 160a can be equal to the thickness of the color filter 160. By increasing the thickness of the extension 160a, the surface of the color filter 150 becomes smoother overall. It is understood that, through a semi-masking technique, the thickness of the photochromic layer 170 covering the extension 160a can be set to be consistent with the thickness of the color filter 160, resulting in a photochromic layer 170 that is thicker in the middle and thinner around the edges. Furthermore, the thicknesses of the color filter 160 and the photochromic layer 170 are more consistent, leading to a smoother surface.

[0051] It is understood that the light-emitting unit 120 in this embodiment can be an RGB light-emitting unit 120, that is, a light-emitting unit 120 of the corresponding color is provided below the corresponding color filter part 160.

[0052] Figure 4 This is a schematic diagram of the display panel according to the third embodiment of this application. See also: Figure 4 As shown, in this embodiment, the extension 160a can be disposed below the photochromic layer 170. Of course, the wavelength of light filtered by the extension 160a needs to be different from the excitation wavelength of the photochromic layer 170. For example, when the excitation wavelength of the photochromic layer 170 is in the same or similar range as the wavelength of blue light, the extension 160a can be configured as one or more of a red extension 161a and a green extension 162a. When the excitation wavelength of the photochromic layer 170 is ultraviolet light, the extension 160a can be configured as one or more of a red extension 161a, a green extension 162a, and a blue extension 163a.

[0053] Specifically, the extension 160a is disposed below the photochromic layer 170. When the light-emitting unit 120 emits white light, after being filtered by the extension 160a, only light of a specific wavelength can pass through the extension 160a. When this specific wavelength of light enters the photochromic layer 170, it cannot reduce, for example, silver halide or silver bromide in the photochromic layer 170 to silver metal and halogen particles. At this time, the emitted light is emitted directly, thereby improving the light emission panel of the pixel, especially for display in dark conditions. In the case of the photochromic layer 170 being transparent, some of the emitted light passes through the extension 160a and is emitted directly, thereby increasing the area of ​​the sub-pixels and improving the brightness of the display panel 100. For the portion not covered by the extension 160a, the light emitted by the light-emitting unit 120 can also excite the photochromic layer 170 to transform into the second state. Of course, the degree of opacity in the second state may be limited, but it can still partially prevent glare and improve the display effect of the display panel 100. When ambient light is incident, in addition to the photochromic layer 170 becoming opaque to block light from entering, the extension 160a can also filter some light to prevent external ambient light from entering the display panel 100.

[0054] It is understandable that although the extension 160a in this embodiment is located in the non-aperture area 102, light can still be emitted from the non-aperture area 102 where the extension 160a is located in the dark. In contrast, the aperture area 101 and the non-aperture area 102 in this embodiment are mainly divided by the aperture area 101 domain of the pixel definition layer 130. In actual display, this does not mean that the non-aperture area 102 does not emit light. Of course, for the exemplary technology where the black matrix is ​​located in the non-aperture area 102, the corresponding non-aperture area 102 does not emit light.

[0055] Figure 5This is a schematic diagram of another display panel according to the third embodiment of this application. See also: Figure 5 As shown, in a specific embodiment, a thin color extension 160a can be provided below the photochromic layer 170. The color of the color extension 160a can be red or green. For example, a red extension 161a is provided on the side of the red filter 161 facing the photochromic layer 170, and a green extension 162a is provided on the side of the green filter 162 facing the photochromic layer 170. The specific choice can be made according to the actual color deviation of the display panel 100 to compensate for the color deviation problem of the display panel 100.

[0056] Specifically, the sum of the thicknesses of the photochromic layer 170 and the extension 160a can be equal to the thickness of the color filter 160. By increasing the thickness of the extension 160a, the surface of the color filter 150 becomes smoother overall. It is understood that, through a semi-masking technique, the thickness of the photochromic layer 170 covering the extension 160a can be set to be consistent with the thickness of the color filter 160, resulting in a photochromic layer 170 that is thicker in the middle and thinner around the edges. Furthermore, the thicknesses of the color filter 160 and the photochromic layer 170 are more consistent, leading to a smoother surface.

[0057] Specifically, on the orthographic projection of the substrate 110, the photochromic layer 170 does not overlap with the color filter 160. In this solution, the photochromic layer 170 replaces the position of the black matrix in the exemplary technology. The photochromic layer 170 separates the adjacent color filters 160. Under strong light, the photochromic layer 170 exhibits an opaque state, thus acting as a black matrix. In low light environments, the photochromic layer 170 exhibits a transparent state, thereby allowing more light to escape and improving the display effect of the display panel 100.

[0058] Figure 6 This is a schematic diagram of the display device of this application, see [link / reference]. Figure 6 As shown, this application also discloses a display device 200, which includes a driving circuit 210 and a display panel 100 in any of the above embodiments, wherein the driving circuit drives the display panel 100 to perform display.

[0059] It should be noted that the inventive concept of this application can form many embodiments, but due to the limited space of the application documents, they cannot all be listed. Therefore, without conflict, the embodiments described above or the technical features can be arbitrarily combined to form new embodiments. After the embodiments or technical features are combined, the original technical effect will be enhanced.

[0060] The above description, in conjunction with specific optional embodiments, provides a further detailed explanation of this application and should not be construed as limiting the specific implementation of this application to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of this application, and all such modifications or substitutions should be considered within the scope of protection of this application.

Claims

1. A display panel, comprising an open area and a non-open area, characterized in that, The display panel includes: Substrate; The light-emitting unit layer is provided with a plurality of light-emitting units, and the plurality of light-emitting units are arranged in an array on the substrate and located in the opening region; A pixel definition layer is disposed on the substrate and located in the non-opening area, and two adjacent light-emitting units are separated by the pixel definition layer; An encapsulation layer is disposed on the light-emitting unit and the pixel definition layer; A color filter layer is disposed on the encapsulation layer; and A photochromic layer is disposed in the non-opening area and is used to switch from a first state to a second state after receiving light; wherein the first state is a transparent state and the second state is an opaque state; The color filter layer includes a plurality of color filter units, which are disposed in the opening area, and adjacent color filter units are separated by the photochromic layer; the photochromic layer is disposed in the same layer as the color filter units; The color filter section is further provided with an extension section in the direction of the photochromic layer. In the orthographic projection of the substrate, the extension section partially overlaps with the photochromic layer; in the orthographic projection of the substrate, the photochromic layer and the color filter section do not overlap. When the photochromic layer is in the first state, the extension is used to transmit the emitted light from the light-emitting unit to increase the light-emitting area of ​​the sub-pixel. When the photochromic layer is in the second state, the extension is used to filter out part of the ambient light entering the photochromic layer at the non-opening area. The display panel is a transparent display panel, and light can pass through the transparent display panel when it is not displaying anything.

2. The display panel according to claim 1, characterized in that, The thickness of the color filter is greater than the thickness of the photochromic layer.

3. The display panel according to claim 1, characterized in that, The extension is disposed on the photochromic layer; at each of the non-opening regions, the width of the extension is less than or equal to half the width of the photochromic layer. The extension includes a red extension, a green extension, and a blue extension. The color filter includes a blue filter, a red filter, and a green filter. The red extension is disposed on at least one side of the red filter; the green extension is disposed on at least one side of the green filter; and the blue extension is disposed on at least one side of the blue filter.

4. The display panel according to claim 1, characterized in that, The extension is disposed below the photochromic layer and located on the encapsulation layer; the extension includes a red extension and a green extension; The color filter section includes a blue filter section, a red filter section, and a green filter section. The red filter section has a red extension on the side facing the photochromic layer, and the green filter section has a green extension on the side facing the photochromic layer.

5. The display panel according to claim 1, characterized in that, The thickness of the extension is less than the thickness of the color filter, and / or the thickness of the extension is less than the thickness of the photochromic layer.

6. The display panel according to claim 1, characterized in that, The photochromic layer includes organic photochromic materials or inorganic photochromic materials. The organic photochromic materials include organic materials containing photochromic groups, and the inorganic photochromic materials include materials doped with inorganic color-changing particles.

7. The display panel according to claim 1, characterized in that, The degree of opacity of the non-opaque state of the photochromic layer gradually increases with the increase of light intensity.

8. A display device, characterized in that, The device includes a driving circuit and a display panel as described in any one of claims 1-7, wherein the driving circuit is used to drive the display panel to display.

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