Display module and display device

Abstract

The utility model discloses a display module and a display device. The display module comprises a display area and a frame area, the frame area surrounds the periphery of at least one side of the display area, the display module further comprises a display panel and a cover plate, the cover plate covers the display side of the display panel, the display panel comprises a black matrix, and an opening is formed in the black matrix of the frame area; the cover plate comprises a substrate and a shading layer, the shading layer is located on the side, close to the display panel, of the substrate, the shading layer is located in the frame area, the shading layer at least surrounds the edge of the display area on the side where the opening is located, the shading layer is located on the side, away from the display area, of the orthographic projection of the opening on the substrate, and the orthographic projection of the opening and the orthographic projection of the shading layer on the substrate are not overlapped. The shading layer is provided with a notch at a position corresponding to the opening, and the notch is a recess away from the display area.

Description

Technical Field

[0001] Embodiments of the present disclosure belong to the technical field of display, and particularly relate to a display module and a display device. Background Art

[0002] Liquid Crystal Displays (LCDs) are currently widely favored due to their low power consumption, small size, low radiation, low cost, long lifespan, etc. Utility Model Content

[0003] In a first aspect, embodiments of the present disclosure provide a display module, which includes a display area and a border area. The border area surrounds at least one side periphery of the display area.

[0004] The display module further includes a display panel and a cover plate. The cover plate covers the display side of the display panel.

[0005] The display panel includes a black matrix, and an opening is formed in the black matrix of the border area.

[0006] The cover plate includes a substrate and a light-shielding layer. The light-shielding layer is located on the side of the substrate close to the display panel.

[0007] The light-shielding layer is located in the border area, and the light-shielding layer at least surrounds the edge of the display area on the side where the opening is located.

[0008] The light-shielding layer is located on the side of the substrate away from the display area of the orthographic projection of the opening on the substrate, and the opening and the orthographic projection of the light-shielding layer on the substrate do not overlap.

[0009] The light-shielding layer has a notch at a position corresponding to the opening, and the notch is a depression in the direction away from the display area.

[0010] In some embodiments, the cover plate further includes a partially light-transmitting layer located in the border area. The orthographic projection of the partially light-transmitting layer on the substrate is located on the side of the orthographic projection of the opening on the substrate close to the orthographic projection of the notch on the substrate.

[0011] The orthographic projection of the partially light-transmitting layer on the substrate at least covers the part of the orthographic projection of the notch on the substrate away from the display area.

[0012] The partially light-transmitting layer does not overlap with the orthographic projection of the opening on the substrate.

[0013] In some embodiments, the display panel further includes a second substrate.

[0014] The second substrate includes a second base and a first film layer, and the first film layer is located in the border area.

[0015] The first film layer is located on a side of the second substrate close to the cover plate;

[0016] The black matrix is located on a side of the second substrate away from the cover plate;

[0017] The orthographic projection of the first film layer on the substrate is located on a side of the orthographic projection of the opening on the substrate close to the orthographic projection of the notch on the substrate;

[0018] The orthographic projection of the first film layer on the substrate does not overlap with the orthographic projection of the opening on the substrate,

[0019] The orthographic projection of the first film layer on the substrate covers at least a part of the region of the orthographic projection of the notch on the substrate away from the display area.

[0020] In some embodiments, the first film layer is made of a partially light-transmissive material,

[0021] The orthographic projection of the first film layer on the substrate covers the region between the orthographic projections of the opening and the notch on the substrate.

[0022] In some embodiments, the first film layer is made of an opaque material,

[0023] The orthographic projection of the first film layer on the substrate covers a partial region between the orthographic projections of the opening and the notch on the substrate,

[0024] A first distance is provided between a side edge of the orthographic projection of the first film layer on the substrate close to the display area and the orthographic projection of the opening on the substrate,

[0025] The first distance is the preparation tolerance of the first film layer.

[0026] In some embodiments, the display panel further includes a first substrate and a second substrate, and the first substrate and the second substrate are opposed to each other;

[0027] The cover plate is located on a side of the second substrate facing away from the first substrate,

[0028] The first substrate includes a first base and a photosensitive structure,

[0029] The photosensitive structure is located on a side of the first base close to the second substrate, and the effective photosensitive area of the photosensitive structure is located in the border area,

[0030] The second substrate includes a second base,

[0031] The black matrix is located on a side of the second base close to the first substrate;

[0032] The orthographic projection of the opening on the first substrate covers the orthographic projection of the effective photosensitive area of the photosensitive structure on the first substrate.

[0033] In some embodiments, the distance between the orthographic projections on the substrate of the side edge of the notch away from the display area and the side edge of the opening away from the display area ranges from 0.2 to 0.5 mm.

[0034] In some embodiments, the distance between the orthographic projections on the substrate of the edge of the notch close to the display area and the edge of the nearest opening ranges from 0.2 to 0.5 mm.

[0035] In some embodiments, the distance between the orthographic projections on the substrate of the side edge of the partially light-transmitting layer close to the display area and the side edge of the opening away from the display area ranges from 0.13 to 0.15 mm;

[0036] The width of the portion of the partially light-transmitting layer located within the notch in the direction away from the display area ranges from 0.05 to 0.37 mm.

[0037] In some embodiments, the orthographic projection of the partially light-transmitting layer on the substrate covers the notch, and the width of the overlapping region of the orthographic projections of the partially light-transmitting layer and the light-shielding layer surrounding the edge of the notch on the substrate is 0.3 mm or more.

[0038] In some embodiments, the display panel further includes a first substrate, and the first substrate and the second substrate are assembled in a cell;

[0039] The cover plate is located on the side of the second substrate facing away from the first substrate,

[0040] The first substrate includes a first base and a photosensitive structure,

[0041] The photosensitive structure is located on the side of the first base close to the second substrate, and the effective photosensitive area of the photosensitive structure is located in the border area,

[0042] The black matrix is located on the side of the second base close to the first substrate;

[0043] The orthographic projection of the opening on the first substrate covers the orthographic projection of the effective photosensitive area of the photosensitive structure on the first substrate;

[0044] The side boundary of the first film layer close to the display area coincides with the orthographic projection of the side boundary of the opening away from the display area on the substrate.

[0045] In some embodiments, the orthographic projection of the first film layer on the substrate covers the notch, and the width of the overlapping area of the orthographic projection of the first film layer and the light-shielding layer surrounding the edge of the notch on the substrate is 0.13 mm or more.

[0046] In some embodiments, the light transmittance range of the partial light-transmitting layer is 65% to 85%.

[0047] In some embodiments, the second substrate further includes color filters,

[0048] The color filters are located on the side of the black matrix close to the first substrate,

[0049] The orthographic projection of the color filters in the border area on the second substrate covers the orthographic projection of the opening on the second substrate.

[0050] In some embodiments, the photosensitive structure includes a plurality of photosensitive units;

[0051] One photosensitive unit corresponds to one opening, and the plurality of photosensitive units correspond to a plurality of different openings;

[0052] The distance between adjacent edges of adjacent openings ranges from 10 μm or more.

[0053] In some embodiments, one photosensitive unit corresponds to a color filter of one color, and the color filters corresponding to the plurality of photosensitive units have different colors;

[0054] The color filters include red color filters, blue color filters, and green color filters,

[0055] The red color filters, the blue color filters, and the green color filters are arranged in sequence along the extension direction of the display area boundary line corresponding to the border area on their respective sides;

[0056] The photosensitive units corresponding to the red color filters, the photosensitive units corresponding to the blue color filters, and the photosensitive units corresponding to the green color filters are arranged in sequence along the extension direction of the display area boundary line corresponding to the border area on their respective sides.

[0057] In some embodiments, the first substrate further includes at least one dummy photosensitive unit, which is located in the border area and on the side of the first substrate close to the second substrate,

[0058] The at least one dummy photosensitive unit and the photosensitive units corresponding to the red color filters, the photosensitive units corresponding to the blue color filters, and the photosensitive units corresponding to the green color filters are arranged in sequence along the extension direction of the display area boundary line corresponding to the border area on their respective sides;

[0059] The positive projection of the black matrix on the first substrate covers the effective photosensitive area of the dummy photosensitive unit, and the color resist does not overlap with the positive projection of the effective photosensitive area of the dummy photosensitive unit on the first substrate.

[0060] In some embodiments, the positive projection of the effective photosensitive area of the dummy photosensitive unit and the light-shielding layer on the substrate at least partially overlap;

[0061] Alternatively, the positive projection of the effective photosensitive area of the dummy photosensitive unit and the light-shielding layer on the substrate do not overlap.

[0062] In some embodiments, the notch is mirror-symmetric with respect to the center line of the border area on the side where it is located;

[0063] The center line is perpendicular to the length direction of the border area on the side where the notch is located.

[0064] In some embodiments, the photosensitive unit includes a plurality of first photosensitive transistors, and the plurality of first photosensitive transistors are arranged in sequence along the extension direction of the boundary line of the display area corresponding to the border area on the side where they are located,

[0065] The dummy photosensitive unit includes a plurality of second photosensitive transistors, and the plurality of second photosensitive transistors are arranged in sequence along the extension direction of the boundary line of the display area corresponding to the border area on the side where they are located;

[0066] The gates of the first photosensitive transistors and the gates of the second photosensitive transistors are electrically connected to a first signal line,

[0067] The first poles of the first photosensitive transistors and the first poles of the second photosensitive transistors are electrically connected to a second signal line,

[0068] The second poles of the first photosensitive transistors in the photosensitive unit corresponding to the red color resist are electrically connected to a third signal line;

[0069] The second poles of the first photosensitive transistors in the photosensitive unit corresponding to the blue color resist are electrically connected to a fourth signal line;

[0070] The second poles of the first photosensitive transistors in the photosensitive unit corresponding to the green color resist are electrically connected to a fifth signal line;

[0071] The second poles of the second photosensitive transistors are electrically connected to a sixth signal line.

[0072] In a second aspect, an embodiment of the present disclosure provides a display module, which includes a display area and a border area, and the border area surrounds at least one side periphery of the display area,

[0073] The display module further includes a display panel and a cover plate, and the cover plate covers the display side of the display panel,

[0074] The display panel includes a photosensitive structure, and an effective photosensitive area of the photosensitive structure is located in the border area.

[0075] The cover plate includes a substrate and a light-shielding layer, and the light-shielding layer is located on a side of the substrate close to the display panel.

[0076] The light-shielding layer is located in the border area, and the light-shielding layer at least surrounds an edge of the display area on a side where the photosensitive structure is located.

[0077] The light-shielding layer is located on a side of a positive projection of the effective photosensitive area of the photosensitive structure on the substrate away from the display area, and the effective photosensitive area of the photosensitive structure and the positive projection of the light-shielding layer on the substrate do not overlap.

[0078] The light-shielding layer has a notch at a position corresponding to the effective photosensitive area of the photosensitive structure, and the notch is a depression in a direction away from the display area.

[0079] In some embodiments, the photosensitive structure includes a plurality of photosensitive units.

[0080] The plurality of photosensitive units are arranged in sequence along an extending direction of a boundary line of the display area corresponding to the border area on a side where they are located.

[0081] The plurality of photosensitive units are correspondingly located at a middle position or an end position of the boundary line of the display area on a side where they are located.

[0082] In some embodiments, a shape of a middle portion of the boundary line of the display area corresponding to the border area on a side where the photosensitive unit is located includes a straight line shape, a semi-circular arc line shape or a parabolic line shape.

[0083] The plurality of photosensitive units are correspondingly located at a middle position or an end position of a middle portion of the boundary line of the display area on a side where they are located.

[0084] In some embodiments, the border area includes a bonding side border area and a first side border area, and the bonding side border area and the first side border area are oppositely arranged.

[0085] The photosensitive structure is located in the first side border area.

[0086] The display module further includes a dummy load circuit, an electrostatic discharge circuit and a reference voltage circuit, at least located in the first side border area.

[0087] The dummy load circuit, the electrostatic discharge circuit, the photosensitive structure and the reference voltage circuit are arranged in sequence along a direction away from the display area.

[0088] In a third aspect, an embodiment of the present disclosure provides a display device, which includes the above-mentioned display module.

[0089] For the display module provided in the embodiment of the present disclosure, on the one hand, the light-shielding layer can avoid the effective photosensitive area of the photosensitive structure, preventing the light-shielding layer from blocking the effective photosensitive area of the photosensitive structure due to manufacturing tolerances and cover plate bonding tolerances, thereby ensuring that the effective photosensitive area of the photosensitive structure can normally sense external light (such as ambient light); on the other hand, the light-shielding layer basically does not affect the overall appearance and visual effect of the display module, such as basically not affecting the integrated black effect of the display module when the screen is off; furthermore, the light-shielding layer also does not block incident light with a relatively large incident angle irradiating the effective photosensitive area of the photosensitive structure (such as incident light with an incident angle in the range of ±30° to ±80°), so as not to affect the reception of large-angle incident light by the effective photosensitive area of the photosensitive structure, and further ensuring that the sensing curve of the effective photosensitive area of the photosensitive structure for incident light within a large angle range smoothly transitions with the change of the incident angle.

[0090] By adopting the above-mentioned display module, the display device provided in the embodiment of the present disclosure can not only ensure the normal sensing of external light by the effective photosensitive area of the photosensitive structure in the display device, but also ensure the overall appearance and visual effect of the display device, and further ensure that the sensing curve of the effective photosensitive area of the photosensitive structure in the display device for incident light within a large angle range smoothly transitions with the change of the incident angle. BRIEF DESCRIPTION OF THE DRAWINGS

[0091] The drawings are used to provide a further understanding of the embodiments of the present disclosure, and constitute a part of the specification. They are used together with the embodiments of the present disclosure to explain the present disclosure, and do not constitute a limitation to the present disclosure. By describing the detailed exemplary embodiments with reference to the drawings, the above and other features and advantages will become more obvious to those skilled in the art. In the drawings:

[0092] Figure 1 It is a schematic diagram of the circuit layout in the first side border area and the bonding side border area of the liquid crystal display screen in the related art.

[0093] Figure 2a It is a schematic diagram of the occlusion test of large-angle light incident on the light sensor by the ink in the related art.

[0094] Figure 2b It is a schematic diagram of the vertical rotation of the display screen in the occlusion test of large-angle light incident on the light sensor by the ink in the related art.

[0095] Figure 2c It is a schematic diagram of the horizontal rotation of the display screen in the occlusion test of large-angle light incident on the light sensor by the ink in the related art.

[0096] Figure 3It is a curve graph showing the change of the illuminance value measured by the light sensor as the horizontal and vertical rotation angles of the display screen change in the related art.

[0097] Figure 4a It is a top view schematic diagram of the side border area where the photosensitive structure of a display module is located in an embodiment of the present disclosure.

[0098] Figure 4b For Figure 4a It is an enlarged top view schematic diagram of the position where the photosensitive structure is located in

[0099] Figure 4c For Figure 4b It is a structural cross-sectional schematic diagram along the AA' cutting line in

[0100] Figure 4d It is a top view schematic diagram of the structure at the position of the photosensitive structure in an embodiment of the present disclosure.

[0101] Figure 4e It is a schematic diagram of the calculation principle of the distance between the light-shielding layer and the photosensitive structure avoiding each other in an embodiment of the present disclosure.

[0102] Figure 5a It is a top view schematic diagram of the side border area where the photosensitive structure of another display module is located in an embodiment of the present disclosure.

[0103] Figure 5b For Figure 5a It is an enlarged top view schematic diagram of the position where the photosensitive structure is located in

[0104] Figure 5c For Figure 5b It is a structural cross-sectional schematic diagram along the BB' cutting line in

[0105] Figure 6a For Figure 4c It is a curve graph showing the change of the photosensitive structure's sensed illuminance as the incident angle of the incident light changes for the display module in

[0106] Figure 6b For Figure 5c It is a curve graph showing the change of the photosensitive structure's sensed illuminance as the incident angle of the incident light changes for the display module in

[0107] Figure 7a It is a top view schematic diagram of the side border area where the photosensitive structure of yet another display module is located in an embodiment of the present disclosure.

[0108] Figure 7b For Figure 7a It is a structural cross-sectional schematic diagram along the CC' cutting line in

[0109] Figure 7c It is a top view schematic diagram of the side border area where the photosensitive structure of yet another display module is located in an embodiment of the present disclosure.

[0110] Figure 7d A schematic cross-sectional view of a structure along Figure 7c the DD' cutting line in the middle.

[0111] Figure 8a A schematic distribution diagram of the photosensitive structure in the side border area where it is located in the embodiment of the present disclosure.

[0112] Figure 8b Another schematic distribution diagram of the photosensitive structure in the side border area where it is located in the embodiment of the present disclosure.

[0113] Figure 8c Another schematic distribution diagram of the photosensitive structure in the side border area where it is located in the embodiment of the present disclosure.

[0114] Figure 8d Another schematic distribution diagram of the photosensitive structure in the side border area where it is located in the embodiment of the present disclosure.

[0115] Figure 8e Another schematic distribution diagram of the photosensitive structure in the side border area where it is located in the embodiment of the present disclosure.

[0116] Figure 8f Another schematic distribution diagram of the photosensitive structure in the side border area where it is located in the embodiment of the present disclosure.

[0117] Figure 9a A top view schematic diagram of the photosensitive unit in the embodiment of the present disclosure.

[0118] Figure 9b In the embodiment of the present disclosure, the first photosensitive transistor and the second photosensitive transistor are along Figure 9a a cross-sectional view of the structure along the FF' cutting line in the middle.

[0119] Figure 9c A schematic circuit connection diagram of the photosensitive unit and the dummy photosensitive unit in the embodiment of the present disclosure.

[0120] Figure 10 A schematic distribution diagram of the bonding side border area, the first side border area and the circuits therein of the display module in the embodiment of the present disclosure.

[0121] Figure 11a A magnified top view schematic diagram of the position where the photosensitive structure of another display module is located in the embodiment of the present disclosure.

[0122] Figure 11b A schematic cross-sectional view of a structure along Figure 11a the EE' cutting line in the middle. Detailed implementation manners

[0123] To enable those skilled in the art to better understand the technical solutions of the embodiments of the present disclosure, a display module and a display device provided by the embodiments of the present disclosure will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0124] In the following, the embodiments of the present disclosure will be described more fully with reference to the accompanying drawings. However, the illustrated embodiments may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. On the contrary, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the disclosure to those skilled in the art.

[0125] The embodiments of the present disclosure are not limited to the embodiments shown in the drawings, but include modifications to the configurations formed based on the manufacturing process. Therefore, the regions illustrated in the drawings have schematic properties, and the shapes of the regions shown in the drawings illustrate the specific shapes of the regions, but are not intended to be restrictive.

[0126] Currently, low-cost display products have become the mainstream demand of various terminals. Function integration can reduce the hardware components in display products, thereby achieving the purpose of cost savings. Based on this, in related technologies, a light sensor is integrated in a liquid crystal display product to implement the light sensing function of the liquid crystal display product. According to the light sensing result, the liquid crystal display product can flexibly adjust parameters such as the display brightness and contrast of the screen, thereby improving the display effect of the liquid crystal display product in different application scenarios and light environments.

[0127] In related technologies, referring to Figure 1 , for HD (High Definition, with a resolution of 720P and above) liquid crystal display screens and fHD (Fine High Definition, with a resolution of 900P) liquid crystal display screens, it includes a liquid crystal cell formed by the alignment of an array substrate (TFT) and a color filter substrate (CF), and a cover plate covering the display side of the liquid crystal cell. The cover plate includes a substrate and an ink formed on the side of the substrate close to the liquid crystal cell. The ink is located at the four peripheral edges of the substrate and is used to block the four peripheral frame areas of the liquid crystal display screen. A light sensor (photosensitive Sensor) is integrated in the liquid crystal display screen. The light sensor uses amorphous silicon thin film transistors (i.e., a-Si TFTs), and is usually integrated in the first side frame area (i.e., the DPO side frame) of the liquid crystal display screen and is integrated in the array substrate (TFT). The first side frame area (i.e., the DPO side frame) is a side frame area opposite to the bonding side frame area (i.e., the DP side frame) of the liquid crystal display screen. The driving chip (COG) and the flexible circuit (FPC) are integrated in the bonding side frame area (i.e., the DP side frame) of the liquid crystal display screen.

[0128] Referring to Figure 1, in Solution 2, the electrostatic discharge circuit (ESD) used to release the static electricity of the photosensor is set in the bonding side border area (i.e., the DP side border), which makes the width of the bonding side border area relatively large (e.g., the width is 3.49 mm), and it is impossible to ensure the mass production level of HD and fHD liquid crystal displays. In order to reduce the width of the bonding side border area (i.e., the DP side border) to ensure the mass production level of HD and fHD liquid crystal displays (e.g., the width of the bonding side border area for ensuring the mass production level is 3.4 mm), it is necessary to adopt the setting in Solution 1, that is, the electrostatic discharge circuit (ESD) used to release the static electricity of the photosensor is set in the first side border area (i.e., the DPO side border) (the width of the bonding side border area can be reduced by up to 0.09 mm). At the same time, a dummy load circuit and a reference voltage circuit (Vcom) are also set in the first side border area. The dummy load circuit is a circuit that stabilizes the output of the GOA (Gate Driver On Array, scanning drive circuit), including components such as resistors and capacitors. The dummy load circuit is a circuit that can absorb power without generating actual physical effects. The reference voltage circuit is used to provide a reference voltage signal to shield the surrounding liquid crystal electric field. The dummy load circuit, the electrostatic discharge circuit (ESD), and the reference voltage circuit (Vcom) are all set in the array substrate (TFT). As can be seen from Figure 1 , in the first side border area, the dummy load circuit, the electrostatic discharge circuit (ESD), the photosensor (photosensor), and the reference voltage circuit (Vcom) are arranged in sequence along the direction away from the display area (AA), which makes the photosensor far from the display area (AA) (e.g., the photosensor is about 0.24 mm away from the display area). Since there are preparation tolerances when the ink is prepared (usually prepared by screen printing), and there are bonding tolerances when the cover plate forming the ink is bonded to the liquid crystal cell, when the photosensor is far from the display area (AA), it is relatively closer to the ink, so the ink is likely to block the photosensor. Therefore, it is necessary to make the ink avoid the photosensor. At the same time, if the ink is too far from the display area in order to avoid the photosensor, the area of the ink covering the border area is relatively small, which will affect the overall appearance and visual effect of the display screen, such as the integrated black effect of the display screen when it is turned off is poor.

[0129] In addition, it is also necessary to consider the blocking of the ink on the large-angle incident light incident on the photosensor. The incident angle range of the large-angle incident light is ±30° to ±80°. In the related technology, the blocking test of the ink on the large-angle incident light incident on the photosensor refers to Figure 2a , Figure 2b and Figure 2cAs shown in the figure, the liquid crystal display screen 10 is fixed on a jig that can rotate up, down, left, and right. The display screen 10 is irradiated with a parallel light source 13, and the illuminance values measured by the light sensor are recorded when the display screen 10 rotates to different angles horizontally (X+ or X-) or vertically (Y+ or Y-) when the light source 13 is vertically irradiated. Among them, the vertical rotation (Y+ or Y-) of the display screen 10 means that the first side border area (the side border area where the light sensor is located) and the bonding side border area (the side border area opposite to the first side border area) of the display screen move in the Y+ and Y- directions respectively. The horizontal rotation (X+ or X-) of the display screen 10 means that the opposite two side border areas of the display screen where the light sensor is not set move in the X+ and X- directions respectively. Refer to Figure 3 , when the screen rotates 35° in the Y- direction, the illuminance value measured by the light sensor drops sharply. When the screen rotates in the Y+ direction, there is no sharp change in the illuminance value, but the illuminance value changes smoothly with the increase of the incident angle. The reason is that when the screen rotates 35° in the Y- direction, the ink blocks the incident light with a large incident angle, affecting the reception of the light with a large incident angle by the light sensor.

[0130] How to make the illuminance curve measured by the light sensor change smoothly with the incident angle within a large incident angle range is also a problem to be solved.

[0131] To solve the above problems in the disclosed technology, in a first aspect, embodiments of the present disclosure provide a display module. Refer to Figure 4a , Figure 4b and Figure 4c , wherein, it includes a display area 100 and a border area 101. The border area 101 surrounds at least one side periphery of the display area 100. The display module further includes a display panel 1 and a cover plate 2. The cover plate 2 covers the display side of the display panel 1. The display panel 1 includes a black matrix 121, and an opening K is formed in the black matrix 121 of the border area 101; the cover plate 2 includes a substrate 21 and a light-shielding layer 22. The light-shielding layer 22 is located on the side of the substrate 21 close to the display panel 1. The light-shielding layer 22 is located in the border area 101, and the light-shielding layer 22 at least surrounds the edge of the display area 100 on the side where the opening K is located. The light-shielding layer 22 is located on the side of the positive projection of the opening K on the substrate 21 away from the display area 100. The opening K and the positive projection of the light-shielding layer 22 on the substrate 21 do not overlap. The light-shielding layer 22 has a notch 220 at the position corresponding to the opening K, and the notch 220 is a depression in the direction away from the display area 100.

[0132] In a second aspect, embodiments of the present disclosure provide a display module. Refer to Figure 4a , Figure 4b and Figure 4c, wherein, it includes a display area 100 and a border area 101. The border area 101 surrounds at least one side periphery of the display area 100. The display module further includes a display panel 1 and a cover plate 2. The cover plate 2 covers the display side of the display panel 1. The display panel 1 includes a photosensitive structure 3. The effective photosensitive area of the photosensitive structure 3 is located in the border area 101. The cover plate 2 includes a substrate 21 and a light-shielding layer 22. The light-shielding layer 22 is located on the side of the substrate 21 close to the display panel 1. The light-shielding layer 22 is located in the border area 101, and the light-shielding layer 22 at least surrounds the edge of the display area 100 on the side where the photosensitive structure 3 is located. The light-shielding layer 22 is located on the side of the substrate 21 away from the display area 100 of the orthographic projection of the effective photosensitive area of the photosensitive structure 3. The effective photosensitive area of the photosensitive structure 3 and the orthographic projection of the light-shielding layer 22 on the substrate 21 do not overlap. The light-shielding layer 22 has a notch 220 at the position corresponding to the effective photosensitive area of the photosensitive structure 3. The notch 220 is a depression in the direction away from the display area 100.

[0133] In some embodiments, the display panel 1 further includes a first substrate 11 and a second substrate 12 which are opposed to each other. The cover plate 2 is located on the side of the second substrate 12 away from the first substrate 11. The first substrate 11 includes a first base 110 and a photosensitive structure 3. The photosensitive structure 3 is located on the side of the first base 110 close to the second substrate 12, and the effective photosensitive area of the photosensitive structure 3 is located in the border area 101. The second substrate 12 includes a second base 120. A black matrix 121 is located on the side of the second base 120 close to the first substrate 11. The orthographic projection of the opening K on the first base 110 covers the orthographic projection of the effective photosensitive area of the photosensitive structure 3 on the first base 110.

[0134] Among them, the effective photosensitive area of the photosensitive structure 3 can sense the external ambient light, and convert the sensed external ambient light into an electrical signal and provide it to the display module. The display module adjusts parameters such as its display brightness and contrast according to the intensity of the external ambient light, so as to improve the display effect of the display module in different application scenarios and light environments. In this embodiment, the effective photosensitive area of the photosensitive structure 3 is exposed at the opening K, so the area of the opening K can be determined as the effective photosensitive area.

[0135] The photosensitive structure 3 can adopt a photosensitive thin-film transistor. The light-shielding layer 22 can adopt ink, and the ink can form an occlusion for the border area 101 of the display module, thereby improving the appearance visual effect of the display module, such as the integrated black effect when the display module is turned off. It should be noted that as long as the effective photosensitive area of the photosensitive structure 3 and the orthographic projection of the light-shielding layer 22 on the substrate 21 do not overlap, for example, the channel area of the photosensitive thin-film transistor is its effective photosensitive area, as long as the channel area of the photosensitive thin-film transistor and the orthographic projection of the light-shielding layer 22 on the substrate 21 do not overlap.

[0136] In this embodiment, by making the light-shielding layer 22 recessed to form a notch 220 in the position corresponding to the opening K in a direction away from the display area 100, on the one hand, the light-shielding layer 22 can avoid the effective light-sensitive area of the photosensitive structure 3, preventing the light-shielding layer 22 from blocking the effective light-sensitive area of the photosensitive structure 3 due to the manufacturing tolerance and the fitting tolerance with the cover plate 2, so as to ensure that the effective light-sensitive area of the photosensitive structure 3 can normally sense external light (such as ambient light); on the other hand, the light-shielding layer 22 is locally recessed to form a notch 220 at the position corresponding to the opening K, which basically does not affect the overall visual appearance of the display module, such as basically not affecting the integrated black effect of the display module when the screen is off; on the third hand, the light-shielding layer 22 will not block the incident light with a relatively large incident angle (such as the incident light within the range of ±30° to ±80°) irradiating the effective light-sensitive area of the photosensitive structure 3, so as not to affect the reception of the incident light with a large incident angle by the effective light-sensitive area of the photosensitive structure 3, and further ensure that the sensing curve of the effective light-sensitive area of the photosensitive structure 3 for the incident light within the large incident angle range changes smoothly with the change of the incident angle.

[0137] In some embodiments, referring to Figure 4c and Figure 4d , the display module further includes an optically clear adhesive layer 4 located between the cover plate 2 and the display panel 1; the first substrate 11 further includes a first polarizer 111 located on the side of the first substrate 110 away from the second substrate 12, and the first polarizer 111 extends from the display area 100 to the border area 101; the second substrate 12 further includes a color filter 122 and a second polarizer 123, and the black matrix 121 and the color filter 122 are sequentially stacked on the side of the second substrate 120 close to the first substrate 11, and the black matrix 121 and the color filter 122 are located in the display area 100 and the border area 101; the second polarizer 123 is located on the side of the second substrate 120 away from the first substrate 11; the orthographic projection of the color filter 122 in the border area 101 on the second substrate 120 covers the orthographic projection of the opening K on the second substrate 120.

[0138] In some embodiments, referring to Figure 4c , after the first substrate 11 and the second substrate 12 are aligned, the four peripheral edges are sealed by a sealant 5. The first substrate 11 and the second substrate 12 are aligned to form a cell gap, and the cell gap is filled with liquid crystal 6. The display module further includes a backlight module 14 located on the side of the display panel 1 away from the cover plate 2 for providing backlight for the display of the display panel 1.

[0139] In some embodiments, the black matrix 121 in the display area 100 and the black matrix 121 in the border area 101 are prepared by a single manufacturing process, and the color filter 122 in the display area 100 and the color filter 122 in the border area 101 are prepared by a single manufacturing process.

[0140] In some embodiments, the distance M between the orthographic projections on the substrate 21 of one side edge of the notch 220 away from the display area 100 and one side edge of the opening K away from the display area 100 ranges from 0.2 to 0.5 mm.

[0141] In some embodiments, referring to Figure 4e , the preparation tolerance (prepared by screen printing) of the light-shielding layer 22 is ±0.1 mm, so the unilateral tolerance of the light-shielding layer 22 is ±0.05 mm, the fitting equipment accuracy of the cover plate 2 is ±0.1 mm, and the tolerance of the avoidance step height E of the light-shielding layer 22 at the notch 220 (referring to the distance between one side edge of the notch 220 away from the display area 100 and one side edge of the area where the light-shielding layer 22 has no notch close to the display area 100) is ±0.07 mm. Therefore, the cumulative tolerance of the light-shielding layer 22 is:

[0142] C = sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.13 mm. Considering that the cover plate 2 and the display panel 1 are fitted to achieve a Cpk of 1.33 (an index representing the process capability, measuring the ability of the production process to meet the quality requirements; the higher the Cpk, the more stable), after the cover plate 2 and the display panel 1 are fitted, the light-shielding layer 22 avoids the opening K in the black matrix 121 by locally opening the notch 220. Since the effective photosensitive area of the photosensitive structure 3 is exposed at the opening K, the light-shielding layer 22 can further avoid the effective photosensitive area of the photosensitive structure 3 by locally opening the notch 220. The side edge of the notch 220 away from the display area 100 needs to be expanded outward by at least 0.13 - 0.15 mm, that is, the distance between the orthographic projections on the substrate 21 of one side edge of the notch 220 away from the display area 100 and one side edge of the opening K away from the display area 100 is at least 0.13 - 0.15 mm.

[0143] If the distance between the orthographic projections on the substrate 21 of one side edge of the notch 220 away from the display area 100 and one side edge of the opening K away from the display area 100 is directly designed to be 0.15 mm, it cannot meet the requirement that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for incident light in a large incident angle range (±30° to ±80°) changes smoothly with the incident angle.

[0144] To ensure that the sensing curve of the effective light-sensing area of the light-sensing structure 3 for incident light within a large incident angle range (±30° to ±80°) changes smoothly with the incident angle, it is necessary to consider not only the preparation tolerance of the light-shielding layer 22 and the fitting tolerance of the cover plate 2, but also ensure that the incident light with a large incident angle can irradiate the effective light-sensing area of the light-sensing structure 3 after being refracted by some film layers in the display panel 1. That is, the light-shielding layer 22 needs to be further expanded outward on the basis that the distance between the positive projections of the edge of the notch 220 away from the display area 100 and the edge of the opening K away from the display area 100 on the substrate 21 is at least 0.13 - 0.15 mm. The theoretical calculation refers to Figure 4e , the incident angle is θ, the refraction angle is α, A is the distance between the plane where the light-shielding layer 22 is located and the plane where the effective light-sensing area of the light-sensing structure 3 is located. For example, A = the thickness of the optical transparent adhesive layer 4 + the thickness of the second substrate 12, B = the distance between the edge of the effective light-sensing area of the light-sensing structure 3 (i.e., the opening K) away from the display area 100 and the edge of the light-shielding layer 22 close to the display area 100. The incident light is refracted when it enters the display module as Figure 4e shown. For example, the refractive indices of the cover plate 2, the optical transparent adhesive layer 4, and the second substrate 12 are close, and they are all calculated according to a refractive index of 1.5. When the external light enters the display module from the air, according to the refraction principle 1*sinθ = 1.5*sinα... formula (1), tanα = B / A... formula (2).

[0145] From the above formula (1) and formula (2), it can be seen that if the incident angle θ is known, the distance D = B + C that the light-shielding layer 22 needs to avoid the effective light-sensing area of the light-sensing structure 3 can be calculated; B = A*tanα = A*tan(arcsin(sinθ / 1.5)); then D = A*tan(arcsin(sinθ / 1.5)) + C... formula (3).

[0146] If we want to achieve a smooth transition of the sensing curve of the effective light-sensing area of the light-sensing structure 3 for incident light within the range of ±30° to ±80°, the design of the light-shielding layer 22 avoiding the effective light-sensing area of the light-sensing structure 3 can be distinguished according to different demands. Considering the corresponding situations when the A value is different, the range of the A value is 0.316 - 0.394 mm, that is, Amax = 0.394 mm, Amin = 0.316 mm.

[0147] If the incident angle of the incident light satisfies ±30°, that is, θ = 30°, according to formula (3), the distance that the light-shielding layer 22 needs to avoid the effective light-sensing area of the light-sensing structure 3 can be calculated:

[0148] D1 = 0.394*tan(19.4712°) + 0.13 = 0.271... formula (4); D1 is the maximum distance that the light-shielding layer 22 needs to avoid the effective light-sensing area of the light-sensing structure 3 when the incident angle is ±30°.

[0149] D2 = 0.316 * tan(19.4712°) + 0.13 = 0.244... Equation (5); D2 is the minimum distance that the light-shielding layer 22 needs to avoid the effective photosensitive area of the photosensitive structure 3 when the incident angle is ±30°.

[0150] If the incident angle of the incident light satisfies ±80°, that is, θ = 80°, according to Equation (3), the distance that the light-shielding layer 22 needs to avoid the effective photosensitive area of the photosensitive structure 3 can be calculated:

[0151] D1' = 0.394 * tan(41.0364°) + 0.13 = 0.4748... Equation (6); D1' is the maximum distance that the light-shielding layer 22 needs to avoid the effective photosensitive area of the photosensitive structure 3 when the incident angle is ±80°.

[0152] D2' = 0.316 * tan(41.0364°) + 0.13 = 0.4070... Equation (7); D2' is the minimum distance that the light-shielding layer 22 needs to avoid the effective photosensitive area of the photosensitive structure 3 when the incident angle is ±80°.

[0153] It can be calculated from the above Equations (4) - (7) that when the distance M between the projection of the edge of the notch 220 far from the display area 100 and the projection of the edge of the opening K far from the display area 100 on the substrate 21 ranges from 0.244 to 0.4748 mm (after rounding, the value range of the distance M is 0.2 - 0.5 mm), it can not only avoid the light-shielding layer 22 from blocking the effective photosensitive area of the photosensitive structure 3 due to the manufacturing tolerance and the fitting tolerance of the cover plate 2, ensuring that the effective photosensitive area of the photosensitive structure 3 can normally sense external light (such as ambient light); but also ensure that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for incident light in the range of large incident angles (±30° to ±80°) changes smoothly with the incident angle.

[0154] In some embodiments, referring to Figure 4a and Figure 4b , the distance N between the projection of the edge of the notch 220 close to the display area 100 and the projection of the edge of the opening K closest to it on the substrate 21 ranges from 0.2 to 0.5 mm. In this way, it can also avoid the light-shielding layer 22 from blocking the effective photosensitive area of the photosensitive structure 3 due to the manufacturing tolerance and the fitting tolerance of the cover plate 2, ensuring that the effective photosensitive area of the photosensitive structure 3 can normally sense external light (such as ambient light); and ensure that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for incident light in the range of large incident angles (±30° to ±80°) changes smoothly with the incident angle.

[0155] In some embodiments, the orthographic projection of the notch 220 on the substrate 21 includes at least one arc angle, and the arc radius R of the arc angle is greater than or equal to 0.2 mm. This can avoid defects such as oil accumulation and tooth defects at the edge of the notch 220 when the light-shielding layer 22 is formed by screen printing, thereby preventing the light-shielding layer 22 at the edge of the notch 220 from blocking the effective photosensitive area of the photosensitive structure 3.

[0156] In some embodiments, referring to Figure 5a , Figure 5b and Figure 5c , the cover plate 2 further includes a partially light-transmitting layer 23 located in the border area 101. The orthographic projection of the partially light-transmitting layer 23 on the substrate 21 is at least located on the side of the orthographic projection of the opening K on the substrate 21 that is close to the orthographic projection of the notch 220 on the substrate 21. The orthographic projection of the partially light-transmitting layer 23 on the substrate 21 at least covers the part of the orthographic projection of the notch 220 on the substrate 21 that is far from the display area 100. The partially light-transmitting layer 23 does not overlap with the orthographic projection of the opening K on the substrate 21.

[0157] In some embodiments, the partially light-transmitting layer 23 is located on the side of the light-shielding layer 22 that faces away from the substrate 21. This can make the sides of the partially light-transmitting layer 23 and the light-shielding layer 22 close to the light-emitting surface be on the same horizontal plane, avoiding adverse effects on the appearance of the display screen.

[0158] Among them, the light transmittance range of the partially light-transmitting layer 23 is 65% - 85%. For example, the light transmittance range of the partially light-transmitting layer 23 for light with a wavelength of 550 nm is 65% - 85%. In some embodiments, the partially light-transmitting layer 23 can use semi-transparent ink.

[0159] By providing the partially light-transmitting layer 23 in the cover plate 2 so that its orthographic projection on the substrate 21 is at least located on the side of the orthographic projection of the opening K on the substrate 21 that is close to the orthographic projection of the notch 220 on the substrate 21, the partially light-transmitting layer 23 can at least cover the notch 220 area between the light-shielding layer 22 and the orthographic projection of the opening K on the substrate 21, thereby forming a transition in the integrated black effect for the path area from the light-shielding layer 22 to the effective photosensitive area of the photosensitive structure 3, that is, forming a transition in the appearance change for the path area from the light-shielding layer 22 to the effective photosensitive area of the photosensitive structure 3, and further improving the appearance visual effect of the display module, such as improving the integrated black effect when the display module is turned off; at the same time, the partially light-transmitting layer 23 can allow most of the incident light to pass through, so it will not completely block the incident light with a relatively large incident angle (such as incident light within the range of ±30° to ±80°) irradiating the effective photosensitive area of the photosensitive structure 3, and thus will basically not affect the reception of the incident light with a large incident angle by the effective photosensitive area of the photosensitive structure 3, and finally can ensure that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for the incident light within the large incident angle range changes smoothly with the change of the incident angle.

[0160] In some embodiments, the distance P between the positive projection on the substrate 21 of one side edge of the partial light-transmitting layer 23 close to the display area 100 and the positive projection on the substrate 21 of the other side edge of the opening K away from the display area 100 ranges from 0.13 to 0.15 mm; the width Q of the part of the partial light-transmitting layer 23 located in the notch 220 in the direction away from the display area 100 ranges from 0.05 to 0.37 mm.

[0161] With such a setting, incident light rays with an incident angle of ±30° to ±80° will not be blocked by the light-shielding layer 22 and can be incident on the effective photosensitive area of the photosensitive structure 3, so as not to affect the reception of incident light rays with a large incident angle by the effective photosensitive area of the photosensitive structure 3, and further ensure that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for incident light rays within a large incident angle range changes smoothly with the incident angle.

[0162] In the related art, according to the test diagram of the large incident angle light rays of the ink incident on the effective photosensitive area of the photosensitive sensor, when the incident light ray is at the 0° angle, the illuminance value data of the incident light ray measured by the photosensitive sensor is 200, and when the incident light ray is at the ±50° angle (the angle between the incident light ray and the normal of the light-emitting surface of the display panel 1 is ±50°), the illuminance value data of the incident light ray measured by the photosensitive sensor is 140. In this embodiment, through the above settings of the distance P and width Q of the partial light-transmitting layer 23, incident light rays with an incident angle of ±80° will not be blocked by the light-shielding layer 22 and can be incident on the effective photosensitive area of the photosensitive structure 3, and the illuminance value of the incident light ray with an incident angle of ±50° measured by the photosensitive structure 3 can reach half of the illuminance value of the incident light ray at the 0° angle.

[0163] In some embodiments, the positive projection of the partial light-transmitting layer 23 on the substrate 21 covers the notch 220, and the width of the overlapping area of the positive projection of the partial light-transmitting layer 23 and the light-shielding layer 22 surrounding the edge of the notch 220 on the substrate 21 is more than 0.3 mm. On the one hand, this can ensure that there is no gap between the partial light-transmitting layer 23 and the light-shielding layer 22, thereby improving the appearance visual effect of the display module; on the other hand, since the light-shielding layer 22 is screen-printed on the substrate 21 first and then the partial light-transmitting layer 23 is screen-printed during preparation, the light-shielding layer 22 uses light-shielding ink and the partial light-transmitting layer 23 uses semi-transparent ink, and the overprinting ability of the ink is 0.3 mm, so as to ensure that the partial light-transmitting layer 23 can be screen-printed smoothly and the edge of the partial light-transmitting layer 23 is not prone to defects.

[0164] In some embodiments, the thickness range of the partial light-transmitting layer 23 is 3 - 7 μm.

[0165] In some embodiments, referring to Figure 6a and Figure 6b , Figure 6a is Figure 4cThe figure shows the change curve of the photosensitivity structure 3's photosensitivity illumination with the incident angle of the incident light of the display module. Figure 6b is Figure 5c The figure shows the change curve of the photosensitivity illumination of the photosensitivity structure 3 with the incident angle of the incident light of the display module. Figure 4c For the display module structure, when the incident angle of the incident light is between 45° and 50°, the photosensitivity illumination of the photosensitivity structure 3 is 250 - 300 lux (lux). Figure 5c For the display module structure, when the incident angle of the incident light is between 45° and 50°, the photosensitivity illumination of the photosensitivity structure 3 is 210 - 240 lux, and the change curve of the photosensitivity illumination of the photosensitivity structure 3 obtained by testing with the incident angle of the incident light is still a smooth transition. If the photosensitivity illumination value of the photosensitivity structure 3 decreases to about 150 lux when the incident angle of the incident light is 50°, the change curve of the photosensitivity illumination of the photosensitivity structure 3 with the incident angle of the incident light will have a mutation, and the corresponding change curve of the photosensitivity illumination with the incident angle of the incident light cannot be smooth. The transmittance value corresponding to the photosensitivity illumination of 150 lux is about 150 / 250 = 60%. Therefore, the transmittance range of part of the light-transmitting layer 23 needs to be set to 65% - 85%.

[0166] In some embodiments, referring to Figure 7a and Figure 7b , on the basis of the display module structure in Figure 4c the display panel 1 further includes a second substrate 12. The second substrate 12 includes a second base 120 and a first film layer 124. The first film layer 124 is located in the border area 101; the first film layer 124 is located on the side of the second base 120 close to the cover plate 2, and the black matrix 121 is located on the side of the second base 120 far from the cover plate 2; the orthographic projection of the first film layer 124 on the substrate 21 is located on the side of the orthographic projection of the opening K on the substrate 21 close to the orthographic projection of the notch 220 on the substrate 21; the orthographic projection of the first film layer 124 on the substrate 21 does not overlap with the orthographic projection of the opening K on the substrate 21, and the orthographic projection of the first film layer 124 on the substrate 21 covers at least part of the area of the orthographic projection of the notch 220 on the substrate 21 far from the display area 100.

[0167] In some embodiments, the display panel 1 further includes a first substrate 11, and the first substrate 11 and the second substrate 12 are aligned; the cover plate 2 is located on the side of the second substrate 12 away from the first substrate 11. The first substrate 11 includes a first base 110 and a photosensitive structure 3. The photosensitive structure 3 is located on the side of the first base 110 close to the second substrate 12, and the effective photosensitive area of the photosensitive structure 3 is located in the border area 101. The black matrix 121 is located on the side of the second base 120 close to the first substrate 11; the orthographic projection of the opening K on the first base 110 covers the orthographic projection of the effective photosensitive area of the photosensitive structure 3 on the first base 110; the boundary on the side of the first film layer 124 close to the display area 100 coincides with the orthographic projection on the substrate 21 of the boundary on the side of the opening K away from the display area 100.

[0168] In some embodiments, the first film layer 124 is made of a partially transparent material, such as semi-transparent ink, and the orthographic projection of the first film layer 124 on the substrate 21 covers the area between the orthographic projection of the opening K and the orthographic projection of the notch 220 on the substrate 21.

[0169] In some embodiments, the light transmittance range of the first film layer 124 is 65% - 85%.

[0170] By providing the partially transparent first film layer 124 on the side of the second base 120 away from the cover plate 2 or on the side of the second base 120 close to the cover plate 2, such that its orthographic projection on the substrate 21 is located on the side of the orthographic projection of the opening K on the substrate 21 close to the orthographic projection of the notch 220 on the substrate 21, the partially transparent layer 23 can cover the notch 220 area between the light-shielding layer 22 and the orthographic projection of the opening K on the substrate 21, thereby forming a transition in the integrated black effect for the path area from the light-shielding layer 22 to the effective photosensitive area of the photosensitive structure 3, that is, forming a transition in the appearance change for the path area from the light-shielding layer 22 to the effective photosensitive area of the photosensitive structure 3, and further enhancing the appearance visual effect of the display module, such as enhancing the integrated black effect when the display module is in the off-screen state; at the same time, since the first film layer 124 is directly provided on the second base 120, the first film layer 124 can be regarded as a part of the second substrate 12, and it will not completely block the incident light with a relatively large incident angle (such as incident light within the range of ±30° to ±80°) irradiating the effective photosensitive area of the photosensitive structure 3, thus not affecting the reception of the large-incident-angle incident light by the effective photosensitive area of the photosensitive structure 3, and ultimately ensuring that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for the incident light within the large-incident-angle range changes smoothly with the incident angle.

[0171] Since the first film layer 124 made of a partially light-transmitting material will basically not affect the reception of incident light by the effective photosensitive area of the photosensitive structure 3 even if it locally covers the opening K due to manufacturing tolerances, in this embodiment, the adjacent edges of the first film layer 124 and the opening K are designed to be flush. In this way, it can make the integrated black effect of the path area from the light-shielding layer 22 to the effective photosensitive area of the photosensitive structure 3 form a transition, better improving the appearance visual effect of the display module, while not blocking a partial area of the opening K and avoiding the effective photosensitive area of the photosensitive structure 3 from being blocked.

[0172] In some embodiments, referring to Figure 7c and Figure 7d , the first film layer 124 is made of an opaque material, such as light-shielding ink. The orthographic projection of the first film layer 124 on the substrate 21 covers a partial area between the orthographic projections of the opening K and the notch 220 on the substrate 21. The edge of the orthographic projection of the first film layer 124 on the substrate 21 closer to the display area 100 is spaced from the orthographic projection of the opening K on the substrate 21 by a first distance S, and the first distance S is the manufacturing tolerance of the first film layer 124.

[0173] For example, the first distance S is the manufacturing tolerance of the light-shielding ink, ±0.1 mm. Here, only the manufacturing tolerance of the first film layer 124 needs to be considered. The first film layer 124 is directly prepared on the second substrate 120, and the bonding tolerance of the first film layer 124 does not need to be considered.

[0174] In some embodiments, referring to Figure 7a - Figure 7d , the display module further includes an optically transparent adhesive layer 4 located between the cover plate 2 and the display panel 1; the first substrate 11 further includes a first polarizer 111, and the first polarizer 111 is located on the side of the first substrate 110 facing away from the second substrate 12, and the first polarizer 111 extends from the display area 100 to the border area 101; the second substrate 12 further includes a color resistor 122 and a second polarizer 123. The black matrix 121 and the color resistor 122 are sequentially stacked on the side of the second substrate 120 close to the first substrate 11, and both the black matrix 121 and the color resistor 122 are located in the display area 100 and the border area 101; the second polarizer 123 is located on the side of the first film layer 124 facing away from the second substrate 120; the orthographic projection of the color resistor 122 in the border area 101 on the second substrate 120 covers the orthographic projection of the opening K on the second substrate 120.

[0175] In some embodiments, the orthographic projection of the first film layer 124 on the substrate 21 covers the notch 220, and the width of the overlapping area of the orthographic projection of the first film layer 124 and the light-shielding layer 22 surrounding the edge of the notch 220 on the substrate 21 is 0.13 mm or more. Since the light-shielding layer 22 is disposed in the cover plate 2 and the fitting tolerance of the cover plate 2 is 0.13 - 0.15 mm, setting the width of the overlapping area of the orthographic projection of the first film layer 124 and the notch 220 on the substrate 21 to be 0.13 mm or more can ensure that there is no gap between the first film layer 124 and the light-shielding layer 22 after the cover plate 2 and the display panel 1 are mated, thereby improving the appearance visual effect of the display module.

[0176] In some embodiments, referring to Figure 8a , Figure 8b , Figure 8c and Figure 8d , the photosensitive structure 3 includes a plurality of photosensitive units 30; the plurality of photosensitive units 30 are arranged in sequence along the extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where they are located; the plurality of photosensitive units 30 are correspondingly located at the middle position or the end position of the boundary line L of the display area 100 on the side where they are located.

[0177] In some embodiments, referring to Figure 8a and Figure 8b , the extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where the photosensitive unit 30 is located is a straight line direction. For example, if the display module is a blind hole screen, that is, there is a blind hole in the display area 100 of the display module, and the imaging device 15 is arranged in the blind hole. The extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where the photosensitive unit 30 of the blind hole screen is located is a straight line direction. Referring to Figure 8c and Figure 8d , the extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where the photosensitive unit 30 is located is the arc direction of a water droplet shape. For example, if the display module is a water droplet screen, that is, the extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where the photosensitive unit 30 of the water droplet screen is located is a water droplet-shaped arc, and the imaging device 15 is arranged in the non-display area surrounded by the water droplet-shaped arc.

[0178] In some embodiments, referring to Figure 8a , Figure 8b , Figure 8c and Figure 8d , the shape of the middle part of the boundary line L of the display area 100 corresponding to the side border area 101 where the photosensitive unit 30 is located includes a straight line shape, a semi-circular arc line shape or a parabolic shape, and the plurality of photosensitive units 30 are correspondingly located at the middle position or the end position of the middle part of the boundary line of the display area 100 on the side where they are located.

[0179] In some embodiments, referring to Figure 8a , Figure 8b ,Figure 8c and Figure 8d , one photosensitive unit 30 corresponds to one opening K, and multiple photosensitive units 30 correspond to multiple different openings K; the distance m between adjacent edges of adjacent openings K ranges from 10 μm or more.

[0180] In some embodiments, referring to Figure 8a 、 Figure 8b 、 Figure 8c and Figure 8d , one photosensitive unit 30 corresponds to a color filter 122 of one color, and the color filters 122 corresponding to multiple photosensitive units 30 have different colors; the color filters 122 include a red color filter R, a blue color filter B, and a green color filter G, and the red color filter R, the blue color filter B, and the green color filter G are arranged in sequence along the extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where they are located; the photosensitive unit 30 corresponding to the red color filter R, the photosensitive unit 30 corresponding to the blue color filter B, and the photosensitive unit 30 corresponding to the green color filter G are arranged in sequence along the extension direction of the boundary line L of the display area 100 corresponding to the side border area 101 where they are located. The photosensitive units 30 are arranged in this way, which can improve the accuracy of the effective photosensitive area of the entire photosensitive structure 3 for sensing external light, thereby enhancing the effect of the display module adjusting its own display brightness and contrast according to the sensing result of the photosensitive structure 3.

[0181] In some embodiments, when a certain external light source shines on the photosensitive unit 30 corresponding to the red color filter R, the photosensitive unit 30 corresponding to the blue color filter B, and the photosensitive unit 30 corresponding to the green color filter G, the proportions of blue light, green light, and red light in the light emitted by this light source are different. The photosensitive unit 30 corresponding to the red color filter R receives the red light of this light source, the photosensitive unit 30 corresponding to the blue color filter B receives the blue light of this light source, and the photosensitive unit 30 corresponding to the green color filter G receives the green light of this light source. At the same time, the photosensitive unit 30 corresponding to the green color filter G can also detect the ambient light brightness. The voltage and current values detected by the three photosensitive units 30 respectively represent the proportions of red light, blue light, and green light in the irradiation of this external light source. In this way, the color temperature of this external light source can be calculated, so as to adjust parameters such as the display brightness and contrast of the display module accordingly, and improve the display effect of the display module.

[0182] In some embodiments, referring to Figure 8a 、 Figure 8b 、 Figure 8c and Figure 8d, the first substrate 11 further includes at least one dummy photosensitive unit 31, which is located in the border area 101 and on the side of the first substrate 110 close to the second substrate 12. The at least one dummy photosensitive unit 31, the photosensitive units 30 corresponding to the red color filter R, the photosensitive units 30 corresponding to the blue color filter B, and the photosensitive units 30 corresponding to the green color filter G are arranged in sequence along the extension direction of the boundary line L of the display area 100 corresponding to the border area 101 on their respective sides; the orthographic projection of the black matrix 121 on the first substrate 110 covers the effective photosensitive area of the dummy photosensitive unit 31, and the color filter 122 does not overlap with the orthographic projection of the effective photosensitive area of the dummy photosensitive unit 31 on the first substrate 110.

[0183] Among them, both the dummy photosensitive unit 31 and the photosensitive unit 30 can adopt photoelectric conversion thin-film transistors. Due to the shielding of the black matrix 121, the effective photosensitive area of the dummy photosensitive unit 31 cannot receive external light source irradiation, and its sensing result is only used as a reference for the sensing result of the photosensitive unit 30, that is, the photosensitive signal of the photosensitive unit 30 is used to compare with the non-photosensitive signal of the dummy photosensitive unit 31, so as to provide a correction reference for the interference of other ambient light on the display brightness of the display module.

[0184] In some embodiments, the orthographic projection of the effective photosensitive area of the dummy photosensitive unit 31 on the substrate 21 and the light-shielding layer 22 at least partially overlap; or, the orthographic projection of the effective photosensitive area of the dummy photosensitive unit 31 on the substrate 21 and the light-shielding layer 22 do not overlap. That is, the light-shielding layer 22 can avoid or not avoid the effective photosensitive area of the dummy photosensitive unit 31. If the light-shielding layer 22 does not avoid the effective photosensitive area of the dummy photosensitive unit 31, the light-shielding area of the light-shielding layer 22 can be further increased, thereby further improving the light-shielding effect of the light-shielding layer 22 and enhancing the integrated black effect of the display module.

[0185] In some embodiments, referring to Figure 8a , Figure 8b , Figure 8c and Figure 8d , the notch 220 is mirror-symmetrical with respect to the center line Y of the border area 101 on its side; the center line Y is perpendicular to the length direction of the border area 101 where the notch 220 is located. This can improve the aesthetics of the border area 101 where the notch 220 is located and the entire display module.

[0186] In some embodiments, referring to Figure 8a , Figure 8b , Figure 8c and Figure 8d , the photosensitive units 30 corresponding to the red color filter R, the photosensitive units 30 corresponding to the blue color filter B, the photosensitive units 30 corresponding to the green color filter G, and the dummy photosensitive unit 31 are mirror-symmetrical with respect to the center line Y of the border area 101 on their respective sides.

[0187] In some embodiments, referring to Figure 8e and Figure 8f , when the light-shielding layer 22 does not avoid the effective photosensitive area of the dummy photosensitive unit 31, the notch 220 may not be mirror-symmetric with respect to the center line Y of the side frame area 101 where it is located.

[0188] In some embodiments, referring to Figure 9a , Figure 9b and Figure 9c , the photosensitive unit 30 includes a plurality of first photosensitive transistors T1, and the plurality of first photosensitive transistors T1 are arranged in sequence along the extension direction of the boundary line L of the display area 100 corresponding to the side frame area 101 where they are located. The dummy photosensitive unit 31 includes a plurality of second photosensitive transistors T2, and the plurality of second photosensitive transistors T2 are arranged in sequence along the extension direction of the boundary line L of the display area 100 corresponding to the side frame area 101 where they are located. The gates of the first photosensitive transistors T1 and the gates of the second photosensitive transistors T2 are electrically connected to the first signal line G2. The first electrodes of the first photosensitive transistors T1 and the first electrodes of the second photosensitive transistors T2 are electrically connected to the second signal line S1. The second electrodes of the first photosensitive transistors T1 in the photosensitive unit 30 corresponding to the red color filter R are electrically connected to the third signal line R1; the second electrodes of the first photosensitive transistors T1 in the photosensitive unit 30 corresponding to the blue color filter B are electrically connected to the fourth signal line B1; the second electrodes of the first photosensitive transistors T1 in the photosensitive unit 30 corresponding to the green color filter G are electrically connected to the fifth signal line G1; the second electrodes of the second photosensitive transistors T2 are electrically connected to the sixth signal line D3.

[0189] In some embodiments, referring to Figure 9a and Figure 9b , the first photosensitive transistor T1 and the second photosensitive transistor T2 have the same structure, and both include a gate Gate, a gate insulating layer GI, an active layer ACT, a first electrode S', and a second electrode D' stacked in sequence on one side of the first substrate 110. The first electrode S' and the second electrode D' are located on the same layer, and a passivation layer PVX is further provided on the side of the first electrode S' and the second electrode D' facing away from the first substrate 110. For example, the active layer ACT is made of a-si, that is, amorphous silicon material. The photosensitive principles of the first photosensitive transistor T1 and the second photosensitive transistor T2 are the same. Both are that light irradiates to make the active layer ACT capture the energy of photons, causing the negatively charged electrons and positively charged holes in the semiconductor active layer ACT to separate, and the electrons move to form a current, thereby realizing the process of photoelectric conversion.

[0190] In some embodiments, the display module further includes a pixel circuit. The pixel circuit is disposed on the side of the first substrate close to the second substrate, the pixel circuit is located in the display area, the pixel circuit includes a plurality of thin film transistors, and the thin film transistors in the pixel circuit and each film layer (including the gate, the active layer, the first electrode, and the second electrode) of the first photosensitive transistor and the second photosensitive transistor are prepared by a single patterning process.

[0191] In some embodiments, referring to Figure 10 , the border area 101 includes a bonding side border area 101a and a first side border area 101b, and the bonding side border area 101a and the first side border area 101b are arranged opposite to each other; the photosensitive structure 3 is located in the first side border area 101b; the display module further includes a dummy load circuit 7, an electrostatic discharge circuit 8, and a reference voltage circuit 9, at least located in the first side border area 101b, and the dummy load circuit 7, the electrostatic discharge circuit 8, the photosensitive structure 3, and the reference voltage circuit 9 are arranged in sequence along the direction away from the display area 100. With such an arrangement, the effective photosensitive area of the photosensitive structure 3 is far from the display area 100, and the light-shielding layer 22 is recessed to form a notch 220 in the position corresponding to the effective photosensitive area of the photosensitive structure 3 in the direction away from the display area 100, which can enable the light-shielding layer 22 to avoid the effective photosensitive area of the photosensitive structure 3, and prevent the light-shielding layer 22 from blocking the effective photosensitive area of the photosensitive structure 3 due to manufacturing tolerances and the fitting tolerance of the cover plate 2, thereby ensuring that the effective photosensitive area of the photosensitive structure 3 can normally sense external light (such as ambient light).

[0192] In a second aspect, an embodiment of the present disclosure provides a display module, wherein, referring to Figure 11a and Figure 11b, including a display area 100 and a border area 101. The border area 101 surrounds at least one side periphery of the display area 100. The display module further includes a display panel 1 and a cover plate 2. The display panel 1 includes a first substrate 11 and a second substrate 12, and the first substrate 11 and the second substrate 12 are opposed. The cover plate 2 is located on the side of the second substrate 12 facing away from the first substrate 11. The first substrate 11 includes a first base 110 and a photosensitive structure 3. The effective photosensitive area of the photosensitive structure 3 is located in the border area 101 and on the side of the first base 110 close to the second substrate 12. The second substrate 12 includes a second base 120, a black matrix 121, and a color resist 122. The black matrix 121 and the color resist 122 are sequentially stacked on the side of the second base 120 close to the first substrate 11. The black matrix 121 and the color resist 122 are located in the display area 100 and the border area 101. An opening K is formed in the black matrix 121 of the border area 101. The orthographic projection of the color resist 122 in the border area 101 on the second base 120 covers the orthographic projection of the opening K on the second base 120. The orthographic projection of the opening K on the first base 110 covers the orthographic projection of the effective photosensitive area of the photosensitive structure 3 on the first base 110. The cover plate 2 includes a substrate 21 and a light-shielding layer 22. The light-shielding layer 22 is located on the side of the substrate 21 close to the second substrate 12. The light-shielding layer 22 is located in the border area 101 and at least surrounds the edge of the display area 100 on the side where the photosensitive structure 3 is located. The light-shielding layer 22 is located on the side of the orthographic projection of the effective photosensitive area of the photosensitive structure 3 on the substrate 21 away from the display area 100. The effective photosensitive area of the photosensitive structure 3 and the orthographic projection of the light-shielding layer 22 on the substrate 21 do not overlap. The light-shielding layer 22 includes a first portion 221 and a second portion 222. The first portion 221 and the second portion 222 are connected as a whole. The first portion 221 is disposed opposite to the orthographic projection of the effective photosensitive area of the photosensitive structure 3 on the substrate 21. The distance m1 between the boundary of the first portion 221 close to the display area 100 and the boundary of the display area 100 is greater than the distance m2 between the boundary of the second portion 222 close to the display area 100 and the boundary of the display area 100.

[0193] In the display module provided in the embodiments of the present disclosure, on the one hand, the light-shielding layer 22 can avoid the effective photosensitive area of the photosensitive structure 3, preventing the light-shielding layer 22 from blocking the effective photosensitive area of the photosensitive structure 3 due to manufacturing tolerances and the fitting tolerance with the cover plate 2, thereby ensuring that the effective photosensitive area of the photosensitive structure 3 can normally sense external light (such as ambient light); on the other hand, the light-shielding layer 22 basically does not affect the overall visual appearance of the display module, such as basically not affecting the integrated black effect of the display module when the screen is off; on the third hand, the light-shielding layer 22 also does not block the incident light with a relatively large incident angle irradiating on the effective photosensitive area of the photosensitive structure 3 (such as the incident light with an incident angle in the range of ±30° to ±80°), so as not to affect the reception of the large-angle incident light by the effective photosensitive area of the photosensitive structure 3, and further ensuring that the sensing curve of the effective photosensitive area of the photosensitive structure 3 for the incident light in a large-angle range smoothly transitions with the change of the incident angle.

[0194] In a third aspect, the embodiments of the present disclosure further provide a display device, including the display module in any of the above embodiments.

[0195] By adopting the display module in the above embodiments, it can not only ensure the normal sensing of external light by the effective photosensitive area of the photosensitive structure in the display device, but also ensure the overall visual appearance of the display device, and further ensure that the sensing curve of the effective photosensitive area of the photosensitive structure in the display device for the incident light in a large-angle range smoothly transitions with the change of the incident angle.

[0196] The display device provided in the embodiments of the present disclosure can be any product or component with a display function, such as a liquid crystal panel, a liquid crystal TV, a liquid crystal billboard, a display, a mobile phone, a navigator, etc.

[0197] It can be understood that the above embodiments are merely exemplary embodiments adopted to illustrate the principle of the present disclosure, and the present disclosure is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the present disclosure, and these modifications and improvements are also considered within the protection scope of the present disclosure.

Claims

1. A display module, wherein, It includes a display area and a border area, and the border area surrounds at least one side periphery of the display area. The display module further includes a display panel and a cover plate, and the cover plate covers the display side of the display panel. The display panel includes a black matrix, and an opening is formed in the black matrix of the border area. The cover plate includes a substrate and a light-shielding layer, and the light-shielding layer is located on the side of the substrate close to the display panel. The light-shielding layer is located in the border area, and the light-shielding layer at least surrounds the edge of the display area on the side where the opening is located. The light-shielding layer is located on the side of the substrate that is away from the display area in the orthographic projection of the opening on the substrate, and the orthographic projections of the opening and the light-shielding layer on the substrate do not overlap. The light-shielding layer has a notch at the position corresponding to the opening, and the notch is a depression in the direction away from the display area.

2. The display module according to claim 1, wherein, The cover plate further includes a partially light-transmitting layer, which is located in the border area, and the orthographic projection of the partially light-transmitting layer on the substrate is located on the side of the orthographic projection of the opening on the substrate close to the orthographic projection of the notch on the substrate. The orthographic projection of the partially light-transmitting layer on the substrate at least covers the part of the orthographic projection of the notch on the substrate that is away from the display area. The partially light-transmitting layer does not overlap with the orthographic projection of the opening on the substrate.

3. The display module according to claim 1, wherein, The display panel further includes a second substrate. The second substrate includes a second base and a first film layer, and the first film layer is located in the border area. The first film layer is located on the side of the second base close to the cover plate. The black matrix is located on the side of the second base away from the cover plate. The orthographic projection of the first film layer on the substrate is located on the side of the orthographic projection of the opening on the substrate close to the orthographic projection of the notch on the substrate. The first film layer does not overlap with the orthographic projection of the opening on the substrate. The orthographic projection of the first film layer on the substrate covers at least part of the area of the orthographic projection of the notch on the substrate that is away from the display area.

4. The display module according to claim 3, wherein, The first film layer is made of a partially light-transmitting material. The orthographic projection of the first film layer on the substrate covers the area between the orthographic projections of the opening and the notch on the substrate.

5. The display module according to claim 3, wherein, The first film layer is made of an opaque material. The orthographic projection of the first film layer on the substrate covers a partial area between the orthographic projections of the opening and the notch on the substrate. There is a first distance between the edge of the orthographic projection of the first film layer on the substrate close to the display area and the orthographic projection of the opening on the substrate. The first distance is the preparation tolerance of the first film layer.

6. The display module according to claim 2, wherein, The display panel further includes a first substrate and a second substrate, and the first substrate and the second substrate are paired. The cover plate is located on the side of the second substrate away from the first substrate. The first substrate includes a first base and a photosensitive structure. The photosensitive structure is located on the side of the first base close to the second substrate, and the effective photosensitive area of the photosensitive structure is located in the border area. The second substrate includes a second base. The black matrix is located on the side of the second base close to the first substrate. The positive projection of the opening on the first substrate covers the positive projection of the effective photosensitive area of the photosensitive structure on the first substrate.

7. The display module according to claim 6, wherein, The distance range between the side edge of the notch away from the display area and the side edge of the opening away from the display area in the positive projection on the substrate is 0.2 to 0.5 mm.

8. The display module according to claim 7, wherein, The distance range between the edge of the notch close to the display area and the edge of the nearest opening in the positive projection on the substrate is 0.2 to 0.5 mm.

9. The display module according to claim 6, wherein, The distance range between the side edge of the partial light-transmitting layer close to the display area and the side edge of the opening away from the display area in the positive projection on the substrate is 0.13 to 0.15 mm; The width range of the part of the partial light-transmitting layer located in the notch along the direction away from the display area is 0.05 to 0.37 mm.

10. The display module according to claim 6, wherein, The positive projection of the partial light-transmitting layer on the substrate covers the notch, and the width of the overlapping area between the positive projection of the partial light-transmitting layer and the light-shielding layer surrounding the edge of the notch on the substrate is 0.3 mm or more.

11. The display module according to claim 4, wherein, The display panel further includes a first substrate, and the first substrate and the second substrate are aligned. The cover plate is located on the side of the second substrate facing away from the first substrate. The first substrate includes a first base and a photosensitive structure. The photosensitive structure is located on the side of the first base close to the second substrate, and the effective photosensitive area of the photosensitive structure is located in the border area. The black matrix is located on the side of the second base close to the first substrate. The positive projection of the opening on the first substrate covers the positive projection of the effective photosensitive area of the photosensitive structure on the first substrate. The side boundary of the first film layer close to the display area coincides with the side boundary of the opening away from the display area in the positive projection on the substrate.

12. The display module according to claim 3, wherein, The positive projection of the first film layer on the substrate covers the notch, and the width of the overlapping area between the positive projection of the first film layer and the light-shielding layer surrounding the edge of the notch on the substrate is 0.13 mm or more.

13. The display module according to claim 2, wherein, The light transmittance range of the partial light-transmitting layer is 65% to 85%.

14. The display module according to claim 6 or 11, wherein, The second substrate further includes color filters. The color filters are located on the side of the black matrix close to the first substrate. The positive projection of the color filters in the border area on the second base covers the positive projection of the opening on the second base.

15. The display module according to claim 14, wherein, The photosensitive structure includes a plurality of photosensitive units. One photosensitive unit corresponds to one opening, and the plurality of photosensitive units correspond to a plurality of different openings. The spacing range between adjacent edges of adjacent openings is 10 μm or more.

16. The display module according to claim 15, wherein, One photosensitive unit corresponds to one color of color filter, and the colors of the color filters corresponding to the plurality of photosensitive units are different. The color filters include red color filters, blue color filters and green color filters. The red color filters, the blue color filters and the green color filters are arranged in sequence along the extension direction of the display area boundary line corresponding to the border area on their respective sides. The photosensitive units corresponding to the red color resist, the photosensitive units corresponding to the blue color resist, and the photosensitive units corresponding to the green color resist are arranged in sequence along the extension direction of the boundary line of the display area corresponding to the border area on their respective sides.

17. The display module according to claim 16, wherein, The first substrate further includes at least one dummy photosensitive unit, which is located in the border area and on the side of the first substrate close to the second substrate. The at least one dummy photosensitive unit, the photosensitive units corresponding to the red color resist, the photosensitive units corresponding to the blue color resist, and the photosensitive units corresponding to the green color resist are arranged in sequence along the extension direction of the boundary line of the display area corresponding to the border area on their respective sides. The orthographic projection of the black matrix on the first substrate covers the effective photosensitive area of the dummy photosensitive unit, and the color resist does not overlap with the orthographic projection of the effective photosensitive area of the dummy photosensitive unit on the first substrate.

18. The display module according to claim 17, wherein, The effective photosensitive area of the dummy photosensitive unit at least partially overlaps with the orthographic projection of the light-shielding layer on the substrate. Alternatively, the effective photosensitive area of the dummy photosensitive unit does not overlap with the orthographic projection of the light-shielding layer on the substrate.

19. The display module according to claim 18, wherein, The notch is mirror-symmetric with respect to the center line of the border area on its side. The center line is perpendicular to the length direction of the border area on the side where the notch is located.

20. The display module according to claim 18, wherein, The photosensitive unit includes a plurality of first photosensitive transistors, and the plurality of first photosensitive transistors are arranged in sequence along the extension direction of the boundary line of the display area corresponding to the border area on their respective sides. The dummy photosensitive unit includes a plurality of second photosensitive transistors, and the plurality of second photosensitive transistors are arranged in sequence along the extension direction of the boundary line of the display area corresponding to the border area on their respective sides. The gates of the first photosensitive transistors and the gates of the second photosensitive transistors are electrically connected to a first signal line. The first poles of the first photosensitive transistors and the first poles of the second photosensitive transistors are electrically connected to a second signal line. The second poles of the first photosensitive transistors in the photosensitive units corresponding to the red color resist are electrically connected to a third signal line. The second poles of the first photosensitive transistors in the photosensitive units corresponding to the blue color resist are electrically connected to a fourth signal line. The second poles of the first photosensitive transistors in the photosensitive units corresponding to the green color resist are electrically connected to a fifth signal line. The second poles of the second photosensitive transistors are electrically connected to a sixth signal line.

21. A display module, wherein, It includes a display area and a border area, and the border area surrounds at least one side periphery of the display area. The display module further includes a display panel and a cover plate, and the cover plate covers the display side of the display panel. The display panel includes a photosensitive structure, and the effective photosensitive area of the photosensitive structure is located in the border area. The cover plate includes a substrate and a light-shielding layer, and the light-shielding layer is located on the side of the substrate close to the display panel. The light-shielding layer is located in the border area, and the light-shielding layer at least surrounds the edge of the display area on the side where the photosensitive structure is located. The light-shielding layer is located on the side of the orthographic projection of the effective photosensitive area of the photosensitive structure on the substrate away from the display area, and the effective photosensitive area of the photosensitive structure and the orthographic projection of the light-shielding layer on the substrate do not overlap. The light-shielding layer has a notch at a position corresponding to the effective photosensitive area of the photosensitive structure, and the notch is a depression in a direction away from the display area.

22. The display module according to claim 21, wherein, The photosensitive structure includes a plurality of photosensitive units; The plurality of photosensitive units are arranged in sequence along the extending direction of the display area boundary line corresponding to the border area on their respective sides; The plurality of photosensitive units are correspondingly located at the middle position or the end position of the display area boundary line on their respective sides; 23. The display module according to claim 22, wherein, The shape of the middle part of the display area boundary line corresponding to the border area on the side where the photosensitive unit is located includes a straight line shape, a semi-circular arc line shape or a parabolic line shape, The plurality of photosensitive units are correspondingly located at the middle position or the end position of the middle part of the display area boundary line on their respective sides; 24. The display module according to claim 21, wherein, The border area includes a bonding side border area and a first side border area, and the bonding side border area and the first side border area are oppositely arranged; The photosensitive structure is located in the first side border area; The display module further includes a dummy load circuit, an electrostatic discharge circuit and a reference voltage circuit, at least located in the first side border area, The dummy load circuit, the electrostatic discharge circuit, the photosensitive structure and the reference voltage circuit are arranged in sequence in a direction away from the display area.

25. A display device, wherein, A display module according to any one of claims 1-24 is included.

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