Display panel and display device

Abstract

The application provides a display panel and a display device. The display panel comprises two oppositely arranged first substrates and second substrates, and a liquid crystal layer between the first substrates and the second substrates. The first substrates and the second substrates are provided with alignment layers on the side close to the liquid crystal layer. The display panel comprises a display area and a light transmission area. At least one of the alignment layers is provided with a notch in the light transmission area. By arranging the notch on at least one of the alignment layers of the display panel, the filtering effect of the alignment layer on light can be greatly weakened when external light enters the optical element through the display panel, the light loss is reduced, the light transmission rate of the display panel corresponding to the optical element area is improved, the difficulty of the optical element to adopt external ambient light is reduced, and the light quantity of the optical element is effectively increased.

Description

Technical Field

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

[0002] Liquid crystal displays (LCDs) are widely used in various consumer electronics products such as automobiles, mobile phones, televisions, personal digital assistants, digital cameras, laptops, and desktop computers due to their advantages such as high image quality, energy saving, thin body, wide range of applications, stable performance, and security, becoming the mainstream display device.

[0003] In in-vehicle displays, the Driver Monitor System (DMS) monitors driver fatigue levels, improving driving safety. Meanwhile, with the maturation of autonomous driving, vehicle-to-everything (V2X) technology, DMS has evolved and iterated, developing more functions and gaining increasing user acceptance. To meet the monitoring requirements of DMS, optical components, such as cameras, need to be installed on the LCD screen. To avoid misunderstandings caused by directly exposing the camera to the user's field of vision, existing LCD screens equipped with DMS often use a solution that hides the camera on the back of the LCD panel. However, while this solution solves the camera exposure problem, it also makes it difficult for the camera to capture ambient light. This results in insufficient light intake and poor DMS imaging, a problem that urgently needs to be addressed. Summary of the Invention

[0004] This application provides a display panel and a display device thereof, which can improve the light transmittance of the display panel, reduce the difficulty of optical elements to take in ambient light, and increase the amount of light received by optical elements.

[0005] This application provides a display panel comprising: two opposing first substrates and a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. Both the first substrate and the second substrate have an alignment layer disposed on the side near the liquid crystal layer. The display panel includes a display area and a light-transmitting area, and at least one of the alignment layers has a notch in the light-transmitting area.

[0006] Optionally, each of the alignment layers may have a notch in the light-transmitting area.

[0007] Optionally, the notch is filled with an optical film material, the infrared light transmittance of which is greater than that of the alignment layer.

[0008] Optionally, the visible light reflectance of the optical film is less than that of the alignment layer.

[0009] Optionally, the alignment layer includes a first alignment layer disposed on the first substrate and a second alignment layer disposed on the second substrate. The first alignment layer has a first notch in the light-transmitting area, and the second alignment layer has a second notch in the light-transmitting area. The area of ​​the first notch may be the same as or different from the area of ​​the second notch.

[0010] Optionally, the display area and the light-transmitting area are spaced apart, and the display panel further includes a transition area located in the gap between the display area and the light-transmitting area. The display panel film structure of the transition area is different from the display panel film structure of the display area and the display panel film structure of the light-transmitting area.

[0011] Optionally, the first substrate includes: a first substrate and a black matrix layer disposed on the first substrate, the black matrix layer being located in the display area, and the black matrix layer including a black matrix ring located at the boundary between the display area and the transition area.

[0012] Optionally, the first substrate further includes a color filter layer and a first planarization layer sequentially stacked on the black matrix layer. The color filter layer is located in the display area, the transition area, and the light-transmitting area. The first planarization layer is located in the display area, the transition area, and the light-transmitting area, and the thickness of the first planarization layer in the light-transmitting area is greater than the thickness of the first planarization layer in the display area.

[0013] Optionally, the first substrate further includes a first alignment layer disposed on the first planarization layer, the first alignment layer being located in the display area and the transition area, the first alignment layer having a first notch in the light-transmitting area, the edge of the first notch being located at the boundary between the light-transmitting area and the transition area.

[0014] Optionally, the first substrate further includes a first optical film material filling the first gap, wherein the infrared light transmittance of the first optical film material is greater than the infrared light transmittance of the alignment layer.

[0015] Optionally, the first substrate further includes a support pillar layer disposed between the first alignment layer and the first planarization layer, the support pillar layer including a plurality of support pillars spaced apart, the plurality of support pillars being located in the display area.

[0016] Optionally, the second substrate includes: a second substrate and a thin-film transistor layer disposed on the second substrate, the thin-film transistor layer including thin-film transistors and metal traces, the thin-film transistors being located in the display area and the transition area; the metal traces being located in the display area and the transition area; wherein the metal traces located in the transition area are ring traces.

[0017] Optionally, the thin-film transistor layer further includes an interlayer dielectric layer disposed on the second substrate, the interlayer dielectric layer being located in the display area and the transition area.

[0018] Optionally, the second substrate further includes a second planarization layer disposed on the interlayer dielectric layer, the second planarization layer being located in the display area, the transition area and the light-transmitting area, and the thickness of the second planarization layer in the light-transmitting area being greater than the thickness of the second planarization layer in the display area.

[0019] Optionally, the second substrate further includes a composite film layer disposed on the second planarization layer. The composite film layer includes a first transparent conductive layer, a passivation layer, and a second transparent conductive layer sequentially stacked on the second planarization layer. The composite film layer is located in the display area.

[0020] Optionally, the second substrate further includes a third planarization layer disposed on the composite film layer, the third planarization layer being located in the display area, the transition area and the light-transmitting area, and the thickness of the third planarization layer in the light-transmitting area being greater than the thickness of the third planarization layer in the display area.

[0021] Optionally, the second substrate further includes a second alignment layer disposed on the third planarization layer, the second alignment layer being located in the display area, the transition area and the light-transmitting area, the second alignment layer having a second notch in the light-transmitting area, the edge of the second notch being located within the light-transmitting area.

[0022] Optionally, the second substrate further includes a second optical film material filling the second gap, wherein the infrared light transmittance of the second optical film material is greater than the infrared light transmittance of the alignment layer.

[0023] Accordingly, this application also provides a display device, the display device comprising: an optical element, a backlight module and a display panel as described in any one of the above, the backlight module being disposed on one side of the display panel, and the backlight module having a light-transmitting hole at a position corresponding to the light-transmitting area; the optical element being disposed on the side of the backlight module away from the display panel, and the optical element being disposed corresponding to the light-transmitting hole.

[0024] Optionally, the optical element is an infrared camera.

[0025] This application provides a notch in at least one alignment layer of the display panel, thereby significantly reducing the filtering effect of the alignment layer on light when external light enters the optical element through the display panel, reducing light loss, increasing the light transmittance of the area of ​​the display panel corresponding to the optical element, reducing the difficulty for the optical element to capture external ambient light, effectively increasing the amount of light captured by the optical element, and improving the imaging effect of the optical element. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0027] Figure 1 A schematic diagram of the structure of the display panel provided in an embodiment of this application is shown;

[0028] Figure 2 A top view schematic diagram of the display panel provided in an embodiment of this application is shown;

[0029] Figure 3 This paper shows a schematic diagram of the structure of the first substrate in the display panel provided in Embodiment 1 of this application;

[0030] Figure 4 The black matrix ring provided in Embodiment 1 of this application is shown in Figure 2 A schematic diagram showing the location of region A in the middle;

[0031] Figure 5 The first and second notches provided in Embodiment 1 of this application are shown in Figure 2 A schematic diagram showing the location of region A in the middle;

[0032] Figure 6 This paper shows a schematic diagram of the structure of the second substrate in the display panel provided in Embodiment 1 of this application;

[0033] Figure 7 This invention provides a schematic diagram of the structure of the second substrate in a display panel according to Embodiment 2 of this application.

[0034] Figure 8 The first and second notches provided in Embodiment 3 of this application are shown in Figure 2 A schematic diagram showing the location of region A in the middle;

[0035] Figure 9 This invention provides a schematic diagram of the structure of the second substrate in a display panel according to Embodiment 3 of this application.

[0036] Figure 10The first and second notches provided in Embodiment 4 of this application are shown in Figure 2 A schematic diagram showing the location of region A in the middle;

[0037] Figure 11 This paper shows a schematic diagram of the structure of the first substrate in the display panel provided in Embodiment 4 of this application;

[0038] Figure 12 An exploded view of the assembly of the display device provided in Embodiment 5 of this application is shown. Detailed Implementation

[0039] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of the embodiments. Based on the embodiments of this application, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this application. In addition, it should be understood that the specific embodiments described herein are only for illustration and explanation of this application and are not intended to limit this application. In this application, unless otherwise stated, directional terms such as "upper" and "lower" generally refer to the upper and lower positions of the device in actual use or operation, specifically the drawing directions in the accompanying drawings; while "inner" and "outer" refer to the outline of the device.

[0040] The following disclosure provides many different implementations or examples for carrying out different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or reference letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various implementations and / or arrangements discussed. In addition, various specific examples of processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials. Detailed descriptions are provided below; it should be noted that the order of description of the following embodiments is not intended to limit the preferred order of embodiments.

[0041] Figure 1 A schematic diagram of the structure of the display panel provided in an embodiment of this application is shown, as follows: Figure 1As shown in the figure, Embodiment 1 of this application provides a display panel 10, which includes a first substrate 100 and a second substrate 200, which are disposed opposite to each other. The display panel 10 further includes a liquid crystal layer 300 disposed between the first substrate 100 and the second substrate 200. Liquid crystal molecules are distributed in the liquid crystal layer 300, and these molecules can be deflected under the action of a driving electric field. Both the first substrate 100 and the second substrate 200 have an alignment layer on the side near the liquid crystal layer 300. The alignment layer provides interface conditions for the liquid crystal molecules to arrange uniformly, allowing the liquid crystal molecules to arrange in a predetermined order.

[0042] Figure 2 This illustration shows a top view of the display panel provided in an embodiment of this application, in conjunction with... Figure 1 and Figure 2 As shown, the display panel 10 includes a display area 11 and a light-transmitting area 12. The display area 11 of the display panel 10 is provided with pixel units and is used to perform display functions. The light-transmitting area 12 of the display panel 10 has the function of transmitting light, that is, the light transmittance of the light-transmitting area 12 is higher than that of the display area 11. Therefore, when an optical element is arranged on one side of the display panel 10 at a position corresponding to the light-transmitting area 12, the light can pass smoothly through the light-transmitting area 12 of the display panel 10 and be incident on the optical element so that the optical element can perform its photosensitive function normally.

[0043] In this embodiment, the alignment layer on the first substrate 100 is a first alignment layer, and the alignment layer on the second substrate 200 is a second alignment layer. The first alignment layer and / or the second alignment layer have notches (not shown in the figure) in the light-transmitting area 12. Since at least one alignment layer has a notch in the light-transmitting area 12, the filtering effect of the alignment layer on the light penetrating the light-transmitting area 12 of the display panel 10 can be effectively reduced, light loss can be reduced, and the light transmittance of the display panel 10 in the light-transmitting area 12 can be improved. Preferably, both the first alignment layer and the second alignment layer have notches in the light-transmitting area 12, and the notches on the first alignment layer and the second alignment layer are correspondingly arranged. This embodiment further improves the light transmittance of the display panel 10 in the light-transmitting area 12 by providing notches on both alignment layers of the display panel 10.

[0044] In this embodiment, the light is, for example, infrared light (IR) of 940 (±10) nm, the transmittance is, for example, infrared light transmittance, and the optical element has, for example, an infrared light sensing function. Since the human body can emit infrared light, when the optical element located on one side of the display panel 10 and corresponding to the light-transmitting area 12 collects the infrared light and forms an image, it can effectively protect user privacy while meeting the monitoring requirements of DMS.

[0045] In this embodiment, the gap is filled with an optical film material, and the light transmittance of the optical film material is greater than that of the alignment layer. By filling the gap with an optical film material with higher light transmittance, the light transmittance of the display panel 10 in the light-transmitting area 12 can be improved while filling the gap on the alignment layer, thus achieving planarization.

[0046] In this embodiment, the visible light reflectance of the optical film is less than that of the alignment layer. Because the visible light reflectance of the optical film is less than that of the alignment layer, the uniformity of the display panel 10 is improved, thereby enhancing the display quality.

[0047] In this embodiment, the optical film material is, for example, an anti-reflective coating, which fills the gaps in the alignment layer. The anti-reflective coating can reduce the reflectivity of visible light in the display panel 10 and increase the transmittance of infrared light in the display panel 10.

[0048] Continue to refer to Figure 2 In this embodiment, the display area 11 and the light-transmitting area 12 are spaced apart. The display panel 10 also includes a transition area 13, which is located in the gap region between the display area 11 and the light-transmitting area 12. The display panel film structure of the transition area 13 is different from the display panel film structure of the display area 11 and the display panel film structure of the light-transmitting area 12. Furthermore, the alignment layer is at least disposed in the transition area 13 of the display panel 10. Correspondingly, since an alignment layer is also disposed in the gap region between the display area 11 and the light-transmitting area 12, the liquid crystal molecules near the boundary region between the display area 11 and the transition area 13 can have the same alignment morphology as the liquid crystal molecules in the display area 11, thus ensuring the display effect of the display area 11.

[0049] In this embodiment, the transition zone 13 surrounds the light-transmitting zone 12, and the display zone 11 surrounds the transition zone 13.

[0050] In this embodiment, the display panel 10 may further include a non-display area, which is adjacent to the display area 11 and is arranged around the display area 11.

[0051] Example 1

[0052] Figure 3 This paper shows a schematic diagram of the structure of the first substrate in the display panel provided in Embodiment 1 of this application; Figure 4 The black matrix ring provided in Embodiment 1 of this application is shown in Figure 2 A schematic diagram showing the location of region A in the middle; Figure 5 The first and second notches provided in Embodiment 1 of this application are shown in Figure 2 A schematic diagram showing the location of region A in the middle;

[0053] Figure 6 A schematic diagram of the structure of the second substrate in the display panel provided in Embodiment 1 of this application is shown. The following is in conjunction with… Figures 3-6 The specific film layer structures of the first substrate 100 and the second substrate 200 in the display panel 10 will be described in detail.

[0054] In this embodiment, the alignment layer includes a first alignment layer 160 disposed on the first substrate 100 and a second alignment layer 280 disposed on the second substrate 200. The first alignment layer 160 has a first notch 161 in the light-transmitting area 12, and the second alignment layer 280 has a second notch 281 in the light-transmitting area 12. The area of ​​the first notch 161 is the same as the area of ​​the second notch 281.

[0055] In this embodiment, the first substrate 100 includes a first substrate 110, which serves as a carrier for other film structures on the first substrate 100. The first substrate 110 can be a rigid substrate or a flexible substrate, and its material can be glass, plastic, or other inorganic or organic materials with excellent light transmittance. Preferably, the first substrate 110 is a rigid glass substrate.

[0056] In this embodiment, the first substrate 100 further includes a black matrix layer 120 disposed on the first substrate 110. The black matrix layer 120 is located in the display area 11, meaning that the light-transmitting area 12 does not have the black matrix layer 120. Since the light-transmitting area 12 omits the black matrix layer 120 with low light transmittance, the light transmittance of the display panel 10 can be further improved. Specifically, the black matrix layer 120 located in the display area 11 forms a grid-like black matrix structure 121. The infrared light transmittance of the black matrix structure 121 is 0%. Since the first substrate 100 does not have the black matrix structure 121 in the light-transmitting area 12, the infrared light transmittance of the light-transmitting area 12 can be greatly improved. Furthermore, the black matrix structure 121 includes a black matrix ring 1211 located at the boundary between the display area 11 and the transition area 13, meaning that the black matrix ring 1211 is the dividing line between the display area 11 and the transition area 13.

[0057] In this embodiment, the first substrate 100 further includes a color filter layer 130 and a first planarization layer 140 sequentially stacked on the black matrix layer 120. The color filter layer 130 is located in the display area 11, the transition area 13, and the light-transmitting area 12. The first planarization layer 140 is located in the display area 11, the transition area 13, and the light-transmitting area 12, and the thickness of the first planarization layer 140 in the light-transmitting area 12 is greater than the thickness of the first planarization layer 140 in the display area 11. Specifically, the color filter layer 130 located in the display area 11, the transition area 13, and the light-transmitting area 12 is formed by a co-process. The color filter layer 130 in the display area 11 includes color resist units of multiple colors, which are used to realize the color display function. The first planarization layer 140 located in the display area 11, the transition area 13, and the light-transmitting area 12 is formed by a co-process. The surface of the first planarization layer 140 away from the first substrate 110 is a flat surface, which is used to realize the planarization function. The infrared light transmittance of the color filter layer 130 is 98%, and the infrared light transmittance of the first planarization layer 140 is 100%. Since the infrared light transmittance of both the color filter layer 130 and the first planarization layer 140 is high, the color filter layer 130 and the first planarization layer 140 are retained in both the display area 11 and the light-transmitting area 12.

[0058] In this embodiment, the first substrate 100 further includes a first alignment layer 160 disposed on the first planarization layer 140. The first alignment layer 160 is located between the display area 11 and the transition area 13. The first alignment layer 160 has a first notch 161 in the light-transmitting area 12. The edge of the first notch 161 is located at the boundary between the light-transmitting area 12 and the transition area 13, that is, the edge of the first alignment layer 160 forming the first notch 161 is the boundary line between the transition area 13 and the light-transmitting area 12. The infrared light transmittance of the first alignment layer 160 is 92%. Since the first alignment layer 160 is absent in the light-transmitting area 12, the infrared light transmittance of the light-transmitting area 12 can be greatly improved.

[0059] In this embodiment, the first substrate 100 further includes a first optical film 170 filled within the first notch 161, and the light transmittance of the first optical film 170 is greater than that of the first alignment layer 160. Since the first substrate 100 has a first optical film 170 with higher light transmittance in the region corresponding to the light-transmitting area 12, the infrared light transmittance of the display panel 10 in the light-transmitting area 12 can be effectively improved.

[0060] In this embodiment, the visible light reflectance of the first optical film 170 is less than that of the first alignment layer 160. By reducing the visible light reflectance of the first optical film 170, the uniformity of the display panel 10 can be improved, and the display quality of the display panel 10 can be enhanced.

[0061] In this embodiment, the first optical film 170 is, for example, an anti-reflective coating, which fills the first gap 161 in the first alignment layer 160. The anti-reflective coating can reduce the reflectivity of visible light in the display panel 10 and increase the transmittance of infrared light in the display panel 10.

[0062] In this embodiment, the first substrate 100 further includes a support pillar layer 150 disposed between the first alignment layer 160 and the first planarization layer 140. The support pillar layer 150 includes a plurality of support pillars spaced apart. The support pillars enable a stable spacing between the first substrate 100 and the second substrate 200, ensuring the normal display of the display panel 10. Specifically, the plurality of support pillars are located in the display area 11, that is, the support pillars are not disposed in the light-transmitting area 12. Since the support pillars will diffract infrared light, thereby affecting the imaging effect of the optical elements located on one side of the display panel, this application does not provide the support pillars in the light-transmitting area 12, thereby further improving the infrared light transmittance of the display panel 10 in the light-transmitting area 12 while avoiding diffraction and improving the imaging effect of the optical elements.

[0063] In this embodiment, the second substrate 200 includes a second substrate 210 and a thin-film transistor layer disposed on the second substrate 210. The thin-film transistor layer includes thin-film transistors and metal traces. The thin-film transistors are located in the display area 11 and the transition area 13; the metal traces are located in the display area 11 and the transition area 13. That is, the light-transmitting area 12 does not have the thin-film transistors and the metal traces disposed thereon. The thin-film transistors and metal traces generally include opaque metal materials. Since the light-transmitting area 12 does not have the thin-film transistors and metal traces disposed thereon, the infrared light transmittance of the display panel 10 in the light-transmitting area 12 can be further improved.

[0064] In this embodiment, the thin-film transistor is, for example, a low-temperature polycrystalline silicon (LTPS) thin-film transistor. The thin-film transistor layer includes multiple film layers, such as a light-shielding layer, a buffer layer, a first metal layer, a gate insulating layer, an active layer, an interlayer dielectric layer 220, and a second metal layer sequentially stacked on the second substrate 210. Specifically, the light-shielding layer includes a light-shielding pattern corresponding to the channel region of the active layer, and the light-shielding layer is located in the display area 11 and the transition region 13; the buffer layer is a stacked structure formed by a silicon nitride film layer and a silicon oxide film layer, and the buffer layer is located in the display area 11, the transition region 13, and the light-transmitting region 12; the first metal layer includes a gate and metal traces, and the first metal layer is located in the display area 11 and the transition region 13; the gate insulating layer is a silicon oxide film layer, and the gate insulating layer is located in the display area 11 and the transition region 13. The display area 11, transition area 13, and light-transmitting area 12 are described. The active layer includes a channel region, a heavily doped region, and a lightly doped region, and is located in the display area 11 and the transition region 13. The interlayer dielectric layer 220 is a stacked structure formed by a silicon nitride film layer and a silicon oxide film layer, and is located in the display area 11, the transition region 13, and the light-transmitting area 12. The second metal layer includes a source electrode, a drain electrode, and metal traces, and is located in the display area 11 and the transition region 13. Of course, the type of thin-film transistor in this embodiment is not limited; the thin-film transistor can also be an amorphous silicon thin-film transistor or an oxide thin-film transistor.

[0065] In this embodiment, the second substrate 200 further includes a second planarization layer 230 disposed on the interlayer dielectric layer 220. The second planarization layer 230 is located in the display area 11, the transition area 13, and the light-transmitting area 12. Specifically, the second planarization layer 230 located in the display area 11, the transition area 13, and the light-transmitting area 12 is formed by the same process. The surface of the second planarization layer 230 away from the second substrate 210 is a flat surface, which is used to achieve the planarization function.

[0066] In this embodiment, the second substrate 200 further includes a composite film layer disposed on the second planarization layer 230. The composite film layer includes a first transparent conductive layer 240, a passivation layer 250, and a second transparent conductive layer 260 sequentially stacked on the second planarization layer 230. The composite film layer is located in the display area 11, that is, the light-transmitting area 12 is not provided with the composite film layer, thereby further improving the infrared light transmittance of the display panel 10 in the light-transmitting area 12. Specifically, the first transparent conductive layer 240 and the second transparent conductive layer 260 are made of indium tin oxide (ITO), the passivation layer 250 is made of silicon nitride, and the infrared light transmittance of the composite film layer is 72%. Since the light-transmitting area 12 is not provided with the composite film layer, the infrared light transmittance of the display panel 10 in the light-transmitting area 12 can be significantly improved.

[0067] In this embodiment, the second substrate 200 further includes a third planarization layer 270 disposed on the composite film layer. The third planarization layer 270 is located in the display area 11, the transition area 13, and the light-transmitting area 12, and the thickness of the third planarization layer 270 in the light-transmitting area 12 is greater than the thickness of the third planarization layer 270 in the display area 11. Specifically, the third planarization layer 270 located in the display area 11, the transition area 13, and the light-transmitting area 12 is formed by the same process. The surface of the third planarization layer 270 away from the second substrate 210 is a flat surface, used to achieve the planarization function.

[0068] In this embodiment, the second substrate 200 further includes a second alignment layer 280 disposed on the third planarization layer 270. The second alignment layer 280 is located between the display area 11 and the transition area 13. The second alignment layer 280 forms a second notch 281 at the boundary between the light-transmitting area 12 and the transition area 13, that is, the edge of the second alignment layer 280 forming the second notch 281 is the boundary line between the transition area 13 and the light-transmitting area 12. The second alignment layer 280 has the second notch 281 in the light-transmitting area 12, and the edge of the second notch 281 is located at the boundary between the light-transmitting area 12 and the transition area 13, that is, the edge of the second alignment layer 280 forming the second notch 281 is the boundary line between the transition area 13 and the light-transmitting area 12. The area of ​​the second notch 281 is equal to the area of ​​the first notch 161. The infrared light transmittance of the second alignment layer 280 is 92%. Since the second alignment layer 280 is missing in the light-transmitting area 12, the infrared light transmittance of the light-transmitting area 12 can be greatly improved.

[0069] In this embodiment, the second substrate 200 further includes a second optical film 290 filled within the second notch 281, and the light transmittance of the second optical film 290 is greater than that of the second alignment layer 280. Because the second substrate 200 forms the second optical film 290 with higher light transmittance in the region corresponding to the light-transmitting area 12, the infrared light transmittance of the display panel 10 in the light-transmitting area 12 can be effectively improved.

[0070] In this embodiment, the visible light reflectance of the second optical film 290 is less than that of the second alignment layer 280. By reducing the visible light reflectance of the second optical film 290, the uniformity of the display panel 10 can be improved, and the display quality of the display panel 10 can be enhanced.

[0071] In this embodiment, the second optical film 290 is, for example, an anti-reflective coating, which fills the second notch 281 of the second alignment layer 280. The anti-reflective coating can reduce the reflectivity of visible light in the display panel 10 and increase the transmittance of infrared light in the display panel 10.

[0072] Example 2

[0073] Figure 7 This paper shows a schematic diagram of the structure of the second substrate in the display panel provided in Embodiment 2 of this application, as shown below. Figure 7 As shown, Embodiment 2 of this application provides a display panel 10, which has a similar structure to the display panel 10 in Embodiment 1 of this application. The same parts will not be described again in this embodiment.

[0074] The difference is that the interlayer dielectric layer 220 in the display panel 10 provided in Embodiment 2 of this application is located in the display area 11 and the transition area 13. That is, the interlayer dielectric layer 220 is not provided in the light-transmitting area 12, thereby simplifying the film structure of the light-transmitting area 12, reducing the number of film layers, and further improving the infrared light transmittance of the display panel 10 in the light-transmitting area 12.

[0075] Furthermore, the second substrate 200 also includes a second planarization layer 230 disposed on the interlayer dielectric layer 220. The second planarization layer 230 is located in the display area 11, the transition area 13, and the light-transmitting area 12, and the thickness of the second planarization layer 230 in the light-transmitting area 12 is greater than the thickness of the second planarization layer 230 in the display area 11. Specifically, the second planarization layer 230 located in the display area 11, the transition area 13, and the light-transmitting area 12 is formed by the same process. The surface of the second planarization layer 230 away from the second substrate 210 is a flat surface, used to achieve the planarization function.

[0076] Example 3

[0077] Figure 8 The first and second notches provided in Embodiment 3 of this application are shown in Figure 2 A schematic diagram showing the location of region A in the middle; Figure 9 A schematic diagram of the structure of the second substrate in the display panel provided in Embodiment 3 of this application is shown. (In conjunction with...) Figure 3 , Figure 8 and Figure 9 As shown, Embodiment 3 of this application provides a display panel 10, which has a similar structure to the display panel 10 in Embodiment 1 of this application. For example, the first substrate 100 in Embodiment 3 has the same structure as the first substrate 100 in Embodiment 1. The same parts will not be described again in this embodiment.

[0078] The difference lies in the areas of the first notch 161 and the second notch 281 in the display panel 10 provided in Embodiment 3 of this application. Specifically, the first alignment layer 160 on the first substrate 100 is located between the display area 11 and the transition area 13. The first alignment layer 160 forms a first notch 161 in the light-transmitting area 12. The edge of the first notch 161 is located at the boundary between the light-transmitting area 12 and the transition area 13, that is, the edge of the first alignment layer 160 forming the first notch 161 is the dividing line between the transition area 13 and the light-transmitting area 12. The second alignment layer 280 on the second substrate 200 is located between the display area 11, the transition area 13, and the light-transmitting area 12. The second alignment layer 280 provides a second notch 281 in the light-transmitting area 12. The edge of the second notch 281 is located within the light-transmitting area 12, that is, the area of ​​the second notch 281 is smaller than the area of ​​the first notch 161, thereby reducing light interference and diffraction and improving the imaging effect of the optical elements disposed on one side of the display panel 10.

[0079] Example 4

[0080] Figure 10 The first and second notches provided in Embodiment 4 of this application are shown in Figure 2 A schematic diagram showing the location of region A in the middle; Figure 11 A schematic diagram of the structure of the first substrate in the display panel provided in Embodiment 4 of this application is shown. (In conjunction with...) Figure 6 , Figure 10 and Figure 11 As shown, Embodiment 4 of this application provides a display panel 10, which has a similar structure to the display panel 10 in Embodiment 4 of this application, such as the second substrate 200. The same parts will not be described again in this embodiment.

[0081] The difference lies in the areas of the first notch 161 and the second notch 281 in the display panel 10 provided in Embodiment 4 of this application. Specifically, the second alignment layer 280 on the second substrate 200 is located between the display area 11 and the transition area 13. The second alignment layer 280 forms a second notch 281 in the light-transmitting area 12. The edge of the second notch 281 is located at the boundary between the light-transmitting area 12 and the transition area 13, that is, the edge of the second alignment layer 280 forming the second notch 281 is the dividing line between the transition area 13 and the light-transmitting area 12. The first alignment layer 160 on the first substrate 100 is located between the display area 11, the transition area 13, and the light-transmitting area 12. The first alignment layer 160 provides the first notch 161 in the light-transmitting area 12. The edge of the first notch 161 is located within the light-transmitting area 12, that is, the area of ​​the first notch 161 is smaller than the area of ​​the second notch 281, thereby reducing light interference and diffraction and improving the imaging effect of the optical elements disposed on one side of the display panel 10.

[0082] Example 5

[0083] Figure 12 An exploded view of the assembly of the display device provided in Embodiment 5 of this application is shown. Figure 12 As shown, Embodiment 5 of this application provides a display device, which includes the display panel 10 described in Embodiments 1 to 4 above, as well as a polarizer 20, an optical element 40, and a backlight module 30. The display panel 10 includes a first substrate 100, a second substrate 200, and a liquid crystal layer 300 disposed between the first substrate 100 and the second substrate 200. The display panel 10 includes a light-transmitting area 12 capable of transmitting light. The backlight module 30 is disposed on one side of the display panel 10 and provides a light source required for display. The backlight module 30 has a light-transmitting hole 31 at a position corresponding to the light-transmitting area 12. The polarizer 20 includes a first polarizer 21 and a second polarizer 22 with mutually perpendicular polarization axes. The first polarizer 21 is disposed on the side of the first substrate 100 away from the liquid crystal layer 300, and the second polarizer 22 is disposed on the side of the second substrate 200 away from the liquid crystal layer 300.

[0084] In this embodiment, the optical element 40 is disposed on the side of the backlight module 30 away from the display panel 10, and is respectively disposed corresponding to the light-transmitting area 12 of the display panel 10 and the light-transmitting hole 31 of the backlight module 30. The optical element 40 is used to receive light that passes through the light-transmitting area 12 of the display panel 10 and the light-transmitting hole 31 of the backlight module 30 in sequence, thereby realizing photosensitive imaging. The optical element 40 is used, for example, to perform the monitoring function of DMS. The light is infrared light, which has the function of directly penetrating the first polarizer 21, the liquid crystal layer 300 and the second polarizer 22. The optical element 40 corresponds to an infrared camera, which can effectively protect user privacy. However, it should be noted that this embodiment does not limit the type of light and the photosensitive type of the optical element 40. The light can also be other light besides infrared light, and correspondingly, the optical element 40 can also have the function of sensing other light.

[0085] In summary, this application provides a display panel and a display device. The display panel includes two opposing first substrates and a second substrate, and a liquid crystal layer located between the first substrate and the second substrate. Both the first substrate and the second substrate have an alignment layer on their side near the liquid crystal layer. The display panel includes a display area and a light-transmitting area, and at least one alignment layer has a notch in the light-transmitting area. By providing a notch in at least one alignment layer of the display panel, this application significantly reduces the filtering effect of the alignment layer on light when external light enters the optical element through the display panel, thereby reducing light loss, increasing the light transmittance of the area corresponding to the optical element, reducing the difficulty for the optical element to capture ambient light, effectively increasing the light intake of the optical element, and improving the imaging effect.

[0086] The display panel and display device provided in the embodiments of this application have been described in detail above. Specific examples have been used to illustrate the principles and implementation methods of this application. The description of the above embodiments is only for the purpose of helping to understand the method and core ideas of this application. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the ideas of this application. Therefore, the content of this specification should not be construed as a limitation of this application.

Claims

1. A display panel, characterized in that, The display panel includes: two opposing first substrates and a second substrate, and a liquid crystal layer disposed between the first substrate and the second substrate. Both the first substrate and the second substrate have an alignment layer on the side closest to the liquid crystal layer. The display panel includes a display area and a light-transmitting area. At least one alignment layer has a notch in the light-transmitting area, and the notch is filled with an optical film material. The infrared light transmittance of the optical film material is greater than the infrared light transmittance of the alignment layer. The alignment layer includes a first alignment layer disposed on the first substrate and a second alignment layer disposed on the second substrate. The first alignment layer has a first notch in the light-transmitting area, and the second alignment layer has a second notch in the light-transmitting area. The areas of the first notch and the second notch are different.

2. The display panel according to claim 1, characterized in that, The first substrate includes a color filter layer, which includes color resist units of multiple colors, and the color filter layer is located at least in the light-transmitting area.

3. The display panel according to claim 2, characterized in that, The display area and the light-transmitting area are spaced apart. The display panel also includes a transition area, which is located in the gap between the display area and the light-transmitting area. The display panel film structure of the transition area is different from the display panel film structure of the display area and the display panel film structure of the light-transmitting area. The color filter layer is located in the display area, the transition area and the light-transmitting area.

4. The display panel according to claim 3, characterized in that, The first substrate further includes a first optical film material filling the first gap, and the second substrate further includes a second optical film material filling the second gap. The infrared light transmittance of the first optical film material and the infrared light transmittance of the second optical film material are both greater than the infrared light transmittance of the alignment layer. A portion of the first alignment layer or the second alignment layer is disposed in the light-transmitting area.

5. The display panel according to claim 3, characterized in that, The first substrate includes: a first substrate and a black matrix layer disposed on the first substrate, the black matrix layer being located in the display area, and the black matrix layer including a black matrix ring located at the boundary between the display area and the transition area.

6. The display panel according to claim 4, characterized in that, The first substrate further includes a first planarization layer disposed on the color filter layer. The first planarization layer is located in the display area, the transition area, and the light-transmitting area, and the thickness of the first planarization layer in the light-transmitting area is greater than the thickness of the first planarization layer in the display area.

7. The display panel according to claim 6, characterized in that, The first alignment layer is disposed on the first planarization layer, the first alignment layer is located in the display area and the transition area, and the edge of the first notch is located at the boundary between the light-transmitting area and the transition area.

8. The display panel according to claim 7, characterized in that, The first substrate further includes a support pillar layer disposed between the first alignment layer and the first planarization layer, the support pillar layer including a plurality of support pillars spaced apart, the plurality of support pillars being located in the display area.

9. The display panel according to claim 4, characterized in that, The second substrate includes: a second substrate and a thin-film transistor layer disposed on the second substrate. The thin-film transistor layer includes thin-film transistors and metal traces. The thin-film transistors are located in the display area and the transition area. The metal traces are located in the display area and the transition area. The metal traces located in the transition area are ring traces.

10. The display panel according to claim 9, characterized in that, The thin-film transistor layer further includes an interlayer dielectric layer disposed on the second substrate, the interlayer dielectric layer being located in the display area and the transition area.

11. The display panel according to claim 10, characterized in that, The second substrate further includes a second planarization layer disposed on the interlayer dielectric layer. The second planarization layer is located in the display area, the transition area, and the light-transmitting area, and the thickness of the second planarization layer in the light-transmitting area is greater than the thickness of the second planarization layer in the display area.

12. The display panel according to claim 11, characterized in that, The second substrate further includes a composite film layer disposed on the second planarization layer. The composite film layer includes a first transparent conductive layer, a passivation layer, and a second transparent conductive layer sequentially stacked on the second planarization layer. The composite film layer is located in the display area.

13. The display panel according to claim 12, characterized in that, The second substrate further includes a third planarization layer disposed on the composite film layer. The third planarization layer is located in the display area, the transition area and the light-transmitting area, and the thickness of the third planarization layer in the light-transmitting area is greater than the thickness of the third planarization layer in the display area.

14. The display panel according to claim 13, characterized in that, The second alignment layer is disposed on the third planarization layer, and the second alignment layer is located in the display area, the transition area and the light-transmitting area, with the edge of the second notch located within the light-transmitting area.

15. The display panel according to claim 1, characterized in that, The visible light reflectance of the optical film is less than that of the alignment layer.

16. A display device, characterized in that, The display device includes: an optical element, a backlight module, and a display panel as described in any one of claims 1-15, wherein the backlight module is disposed on one side of the display panel, and the backlight module has a light-transmitting hole at a position corresponding to the light-transmitting area; the optical element is disposed on the side of the backlight module away from the display panel, and the optical element is disposed corresponding to the light-transmitting hole.

17. The display device according to claim 16, characterized in that, The optical element is an infrared camera.

Images