Display module, display device and manufacturing method

Abstract

The present invention discloses a display module, a display device and a manufacturing method, wherein the display module of one embodiment includes: a cover plate, including a visible area and a non-visible frame surrounding the visible area; a display module, including a display area arranged on a substrate and a non-display area surrounding the display area; the display module also includes a sensor area arranged in the non-display area and the visible area, the display module includes a display substrate and a color film substrate, in the sensor area, the display substrate includes a plurality of light-sensitive sensors; the color film substrate includes a black matrix, and the black matrix includes a first groove corresponding to the light-sensitive sensors; the non-visible frame includes a frame boundary close to the visible area, the non-display area includes a first boundary close to the display area and a second boundary away from the display area, the black matrix includes a black matrix boundary close to the second boundary, and in a direction horizontal to the substrate, the ratio of the distance from the frame boundary to the black matrix boundary to the distance from the first boundary to the second boundary is greater than or equal to a preset first threshold.

Description

Technical Field

[0001] The present invention relates to the field of display technology, and in particular to a display module, a display device and a manufacturing method. Background Art

[0002] With the development of display technology, in order to reduce the overall cost of display devices and reduce the upper bezel of display devices, light sensing functions are integrated into display panels. For example, the light-sensitive properties of thin-film transistors formed by a-Si are utilized to integrate thin-film transistor sensors outside the display area of ​​the display panel to achieve light sensing functions, thereby replacing the customer's light-sensing devices and reducing costs and upper space. However, in actual applications, it is found that because the thin-film transistor sensor is too far away from the display area, the visible area of ​​the cover plate must be expanded to meet the requirements of not blocking the light-sensitive area of ​​the thin-film transistor sensor by the ink of the cover plate and allowing the light to be refracted at a wide angle to normally illuminate the thin-film transistor sensor. In other words, the wide field of view (FOV) angle requirement of the light-sensing sensor is met. However, the expansion of the visible area of ​​the cover plate introduces the risk of light leakage from the display module at wide viewing angles.

[0003] How to avoid the risk of light leakage of the display module at a large viewing angle has become a technical problem that needs to be urgently solved by those skilled in the art. Summary of the Invention

[0004] In order to solve at least one of the above problems, a first embodiment of the present invention provides a display module, comprising a display panel and a cover plate covering the display panel, wherein:

[0005] The cover plate includes a visible area and a non-visible frame surrounding the visible area, wherein the non-visible frame includes a frame boundary close to the visible area;

[0006] The display panel includes a display area provided on a substrate and a non-display area surrounding the display area, wherein an orthographic projection of the display area on the substrate falls within an orthographic projection of the visible area on the substrate, and the non-display area includes a first boundary close to the display area and a second boundary away from the display area;

[0007] The display module further includes a sensor area disposed in the non-display area and the visual area. The display panel includes a display substrate and a color filter substrate. In the sensor area,

[0008] The display substrate includes a plurality of light-sensitive sensors;

[0009] The color filter substrate includes a black matrix, the black matrix includes first slots corresponding to the photosensitive sensors one by one, and a black matrix boundary close to the second boundary;

[0010] On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, the distance from the first boundary to the second boundary is a first distance, the distance from the border boundary to the black matrix boundary is a second distance, and the ratio of the second distance to the first distance is greater than or equal to a preset first threshold.

[0011] For example, in the display module provided in some embodiments of the present application, in a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the border edge to the first edge is a third distance;

[0012] The display module further includes a non-sensor area outside the sensor area, and the third distance of the sensor area is greater than the third distance of the non-sensor area.

[0013] For example, in the display module provided in some embodiments of the present application, the color film substrate further includes a color filter disposed in the first groove, each photosensitive sensor includes a photosensitive area, and the orthographic projection of the first groove on the substrate covers the orthographic projection of the photosensitive area of ​​the corresponding photosensitive sensor on the substrate;

[0014] The color filters in the first slots corresponding to different photosensors have different colors.

[0015] For example, in the display module provided in some embodiments of the present application, in a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the black matrix boundary to the second boundary is a fourth distance;

[0016] The fourth distance of the sensor area is smaller than the fourth distance of the non-sensor area, and the fourth distance of the sensor area is smaller than or equal to a preset second threshold.

[0017] For example, in the display module provided in some embodiments of the present application, in a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the black matrix boundary to the second boundary is a fourth distance;

[0018] The fourth distance of the sensor area is equal to the fourth distance of the non-sensor area, and the fourth distance of the sensor area is less than or equal to a preset second threshold;

[0019] The black matrix also includes a second groove arranged on a side of the first groove away from the first boundary, and the color film substrate also includes a light-blocking material filled in the second groove, and the orthographic projection of the second groove on the substrate falls into the orthographic projection of the non-visible frame on the substrate.

[0020] For example, in the display module provided in some embodiments of the present application, the display module further includes a frame sealant disposed between the display substrate and the color filter substrate and close to the second boundary;

[0021] The light-sensitive sensor is a thin film transistor provided on the substrate, and the thin film transistor includes a gate;

[0022] The display module further includes a light shielding portion that is provided in the same layer as the gate and is insulated. The light shielding portion is provided on a side of the gate close to the second boundary and extends to the frame sealant.

[0023] For example, in the display module provided in some embodiments of the present application, in a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from a side of the first groove away from the first boundary to the first boundary is a fifth distance;

[0024] The fifth distance is less than or equal to a preset third threshold.

[0025] For example, in the display module provided in some embodiments of the present application, the display module further includes an annular electrostatic ring, including a first electrostatic ring portion corresponding to the sensor area, and a second electrostatic ring portion other than the first electrostatic ring portion;

[0026] The first electrostatic ring portion is arranged in the display area on one side of the sensor area close to the display area;

[0027] The second electrostatic ring portion is disposed in the non-display area and surrounds the display area.

[0028] For example, in the display modules provided in some embodiments of the present application,

[0029] On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the black matrix boundary to the second boundary is a fourth distance; the fourth distance of the sensor area is smaller than the fourth distance of the non-sensor area, and the fourth distance of the sensor area is smaller than or equal to a preset second threshold;

[0030] On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from a side of the first groove away from the first boundary to the first boundary is a fifth distance; the fifth distance is less than or equal to a preset third threshold.

[0031] For example, in the display module provided in some embodiments of the present application, the display module further includes a backlight source provided on a side of the display panel away from the cover plate;

[0032] The display module further includes a light-shielding tape, which covers the display panel on the side of the sensor area away from the display area, partially covers the non-visible frame at the corresponding position, and partially covers the backlight source at the corresponding position.

[0033] A second embodiment of the present invention provides a display device, including the display module as described in the first embodiment.

[0034] A third embodiment of the present invention provides a method for manufacturing the display module according to the first embodiment, comprising:

[0035] A display panel is formed, the display panel comprising a display area disposed on a substrate and a non-display area surrounding the display area, the non-display area comprising a first boundary proximate to the display area and a second boundary distal from the display area, the display panel further comprising a sensor area disposed in the non-display area, the display panel comprising a display substrate and a color filter substrate, wherein the display substrate comprises a plurality of light-sensitive sensors in the sensor area; the color filter substrate comprises a black matrix, the black matrix comprising first grooves corresponding one-to-one to the light-sensitive sensors, and a black matrix boundary proximate to the second boundary;

[0036] forming a cover plate covering the display panel, the cover plate including a visible area and a non-visible frame surrounding the visible area, the non-visible frame including a frame boundary adjacent to the visible area, the orthographic projection of the display area on the substrate falling within the orthographic projection of the visible area on the substrate, and the orthographic projection of the sensor area on the substrate falling within the orthographic projection of the visible area on the substrate;

[0037] In the sensor area, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, the distance from the first boundary to the second boundary is a first distance, the distance from the border boundary to the black matrix boundary is a second distance, and the ratio of the second distance to the first distance is greater than or equal to a preset first threshold.

[0038] The beneficial effects of the present invention are as follows:

[0039] In response to the existing problems, the present invention develops a display module, a display device, and a manufacturing method. Based on a first distance between a first boundary close to the display area and a second boundary away from the display area in a non-display area of ​​a display substrate of the display module, and a second distance between a black matrix boundary of a black matrix of a color film substrate of the display module close to the second boundary and a frame boundary of a non-visible frame of a cover plate of the display module close to the first boundary, the risk of light leakage of the display module at a wide viewing angle is reduced by increasing the ratio of the second distance to the first distance. In particular, by increasing the ratio of the second distance to the first distance while reducing the distance between the black matrix and the second boundary, and by increasing the ratio of the second distance to the first distance while reducing the distance between the boundary of a sensor of the display substrate close to the display area and the first boundary, the light transmission angle of the display module can be effectively increased, and the risk of light leakage of the display module at a wide viewing angle can be reduced, thereby compensating for the problems existing in the prior art, effectively improving the display effect of the display module, improving the user experience, and having broad application prospects. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0041] Figure 1 A schematic structural diagram of a display module according to an embodiment of the present invention is shown;

[0042] Figure 2 A schematic structural diagram of an upper frame of a display module according to an embodiment of the present invention is shown;

[0043] Figure 3 A schematic structural diagram of an upper frame of a display module according to another embodiment of the present invention is shown;

[0044] Figure 4 A schematic diagram showing light refraction according to an embodiment of the present invention is shown;

[0045] Figure 5 A schematic diagram showing a light right triangle according to an embodiment of the present invention;

[0046] Figure 6 A schematic structural diagram of an upper frame of a display module according to another embodiment of the present invention is shown;

[0047] Figure 7 A schematic structural diagram of a display module according to another embodiment of the present invention is shown;

[0048] Figures 8a-8bA schematic diagram showing an electrostatic ring according to another embodiment of the present invention;

[0049] Figure 9 A schematic structural diagram of a display module according to another embodiment of the present invention is shown;

[0050] Figure 10 A flow chart showing a manufacturing method according to an embodiment of the present invention;

[0051] Figure 11 A schematic structural diagram of a display module according to another embodiment of the present invention is shown;

[0052] Figure 12 A schematic structural diagram of a block black matrix according to an embodiment of the present invention is shown.

[0053] 10-backlight source 20-second polarizer 30-display substrate 31-photosensitive sensor 32-photosensitive area

[0054] 33 - sensor area 341 - second electrostatic ring part 342 - first electrostatic ring part 35 - display unit

[0055] 36 - light shielding part 37 - gate 40 - liquid crystal layer 41 - frame sealant 50 - color filter substrate 51 - black matrix

[0056] 52-color filter 53-first slot 54-light blocking material 55-second slot 60-first polarizer

[0057] 70-OCA glue 80-cover plate 81-non-visible frame 100-display panel 101-light-shielding tape

[0058] 511-block black matrix

[0059] L1-first boundary L2-second boundary L3-frame boundary L4-black matrix boundary L5-sensor boundary

[0060] D1 - first distance D2 - second distance D3 - third distance D4 - fourth distance D5 - fifth distance

[0061] T1-first light T2-external strong light DETAILED DESCRIPTION

[0062] In order to more clearly illustrate the present invention, the present invention is further described below in conjunction with preferred embodiments and accompanying drawings. Similar components in the accompanying drawings are represented by the same reference numerals. It should be understood by those skilled in the art that the following detailed description is illustrative rather than restrictive and should not be used to limit the scope of protection of the present invention.

[0063] It should be noted that the terms “on…”, “formed on…” and “disposed on…” herein may indicate that one layer is directly formed or disposed on another layer, or may indicate that one layer is indirectly formed or disposed on another layer, i.e., there are other layers between the two layers. In this article, unless otherwise specified, the term “located on the same layer” means that two layers, parts, components, elements or parts can be formed by the same patterning process, and that the two layers, parts, components, elements or parts are generally formed of the same material. In this article, unless otherwise specified, the expression “patterning process” generally includes steps such as coating, exposure, development, etching, and stripping of the photoresist. The expression “one-time patterning process” means a process of forming patterned layers, parts, components, etc. using a mask.

[0064] In response to the problem of large-viewing angle light leakage in display modules in related technologies, the inventors proposed, after extensive research and experiments, that the reason for the light leakage is that the horizontal distance between the cover plate ink boundary and the black matrix boundary of the color film substrate is reduced after the cover plate ink boundary expands outward, especially the ratio of this horizontal distance to the horizontal distance of the non-display area of ​​the display substrate is reduced, resulting in a decrease in the light leakage angle and creating a light leakage risk.

[0065] According to the above problems and the causes of the problems, such as Figure 1-Figure 3 As shown, an embodiment of the present invention provides a display module, comprising a display panel 100 and a cover plate 80 covering the display panel 100, wherein:

[0066] The cover plate 80 includes a visible area and a non-visible frame 81 surrounding the visible area, and the non-visible frame 81 includes a frame boundary L3 close to the visible area;

[0067] The display panel 100 includes a display area provided on a substrate and a non-display area surrounding the display area. The orthographic projection of the display area on the substrate falls within the orthographic projection of the visible area on the substrate. The non-display area includes a first boundary L1 close to the display area and a second boundary L2 away from the display area.

[0068] The display module further includes a sensor area 33 disposed in the non-display area and the visual area. The display panel 100 includes a display substrate 30 and a color filter substrate 50. In the sensor area 33,

[0069] The display substrate 30 includes a plurality of light-sensitive sensors 31;

[0070] The color filter substrate 50 includes a black matrix 51 , and the black matrix 51 includes first slots 53 corresponding to the light sensors 31 , and a black matrix boundary L4 close to the second boundary L2 ;

[0071] On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, the distance from the first boundary L1 to the second boundary L2 is a first distance D1, the distance from the border boundary L3 to the black matrix boundary L4 is a second distance D2, and the ratio of the second distance D2 to the first distance D1 is greater than or equal to a preset first threshold.

[0072] In this embodiment, Figure 2 To display the side of the module close to the edge, Figure 3 The side of the display module close to the edge, such as the upper frame of a smartphone. Figure 1 for Figure 2 The cross-sectional view along AA', i.e. the cross-sectional view perpendicular to the substrate, Figure 2 The camera hole on the upper frame of the smartphone is a blind hole, and the sensor area 33 includes four light sensors 311, 312, 313 and 314. Figure 3 The top frame of the smartphone has a camera hole, Figure 3 The smartphone has a water drop screen, so it includes two sensor areas 33 arranged on both sides of the camera hole, including four light sensors 311, 312, 313 and 314. Figure 1-Figure 3 It can be seen that the display module sets the photosensitive sensor in the non-display area of ​​the display substrate of the display module. Due to the light sensitivity requirements of the photosensitive sensor, the non-visible frame of the cover plate surrounds the display area and expands outward at the position corresponding to the sensor area 33, that is, Figure 2 and Figure 3 The raised part of L3 in Figure 1 A third distance D3 between the frame boundary L3 and the first boundary L1.

[0073] like Figure 1 The light T1 shown is the light leakage at a wide viewing angle, which is refracted on the surface of the cover plate to form a light leakage angle θ. This embodiment is based on a first distance between a first boundary close to the display area and a second boundary away from the display area in the non-display area of ​​the display substrate of the display module, and a second distance between a black matrix boundary of the black matrix of the color film substrate of the display module close to the second boundary and a frame boundary of the non-visible frame of the cover plate of the display module close to the first boundary. By increasing the ratio of the second distance to the first distance, the angle of the light leakage angle θ is increased, thereby reducing the risk of light leakage of the display module at a wide viewing angle.

[0074] Specifically, when the non-visible frame of the cover plate expands outward, the line between the frame boundary L3 of the non-visible frame close to the display area and the black matrix boundary L4 of the black matrix of the color filter substrate close to the second boundary is the critical light of the leakage light. In order to reduce the light leakage of the display module under a large viewing angle, the slope of the line connecting L3 and L4 can be changed to improve the light leakage angle. The slope of the line connecting L3 and L4 is related to the horizontal distance between L3 and L4, and the distance from the upper surface of the black matrix of the color filter substrate away from the display substrate to the lower surface of the non-visible frame of the cover plate close to the display substrate. Figure 1 As shown, the distance from the upper surface of the black matrix of the color filter substrate away from the display substrate to the lower surface of the non-visible frame of the cover plate close to the display substrate includes the thickness of the color filter substrate 50 + the thickness of the first polarizer 60 + the thickness of the adhesive 70. Considering that the thickness is related to the specific design of the display module, changing the horizontal distance between L3 and L4, especially changing the ratio of the horizontal distance D2 between L3 and L4 to the two boundary distances D1 of the non-display area, when D2 is greater than the preset first threshold value than D1, can increase the light leakage angle θ, thereby reducing the light leakage risk of the display module at a wide viewing angle.

[0075] Figure 4 Figure 1 is a diagram of light refraction, with an incident angle of β and a refraction angle of α. A = the thickness of the color filter substrate 50 + the thickness of the first polarizer 60 + the thickness of the adhesive 70, and B = the horizontal distance from the edge of the light sensor 31 away from the display area to the edge of the cover frame. Specifically, the refractive index of the cover 80, adhesive 70, first polarizer 60, and display substrate 30 is calculated as 1.5, resulting in a design value of B of A*tan(arcsin(sinβ / 1.5)). Taking into account bonding tolerances, B = A*tan(arcsin(sinβ / 1.5)) + tolerance.

[0076] It is worth noting that, since the distance between the black matrix of the color film substrate away from the upper surface of the display substrate and the lower surface of the non-visible frame of the cover plate close to the display substrate is different in different display modules, this embodiment does not specifically limit the first threshold value. Those skilled in the art should understand that the first threshold value is selected according to the structural dimensions of the display module in actual application to achieve the design criterion of no light leakage at a wide viewing angle for the display module, which will not be elaborated here.

[0077] Specifically, such as Figure 1-Figure 3 As shown, the color film substrate 50 also includes a color filter 52 arranged in the first groove 53, each photosensitive sensor 31 includes a photosensitive area 32, and the orthographic projection of the first groove 53 on the substrate covers the orthographic projection of the photosensitive area 32 of its corresponding photosensitive sensor 31 on the substrate; the colors of the color filters 52 in the first groove 53 corresponding to different photosensitive sensors 31 are different.

[0078] In this embodiment, light detection is performed by light sensors arranged on the upper frame of the display module. For example, the four light sensors 31 are respectively: a light sensor 311 corresponding to a red filter, a light sensor 312 corresponding to a green filter, a light sensor 313 corresponding to a blue filter, and a light sensor 314 used as a reference. Taking into account the inconsistency of the external environment, the amount of light detected by the light sensor 314 is used as a basis to more accurately obtain the amount of light detected by the light sensors of different colors, thereby improving the sensing accuracy of the light sensor. The slot size of the first slot is related to the light-sensitive area 32 of the light sensor 31, such as Figure 1 As shown, the photosensitive area 32 of the photosensitive sensor 31 is smaller than the slot size of the first slot, so that external light can pass through the first slot and enter the photosensitive area of ​​the photosensitive sensor, thereby realizing photosensitivity detection of the photosensitive sensor.

[0079] In an optional embodiment, if Figure 1 As shown, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the black matrix boundary to the second boundary is a fourth distance;

[0080] The fourth distance of the sensor area is smaller than the fourth distance of the non-sensor area, and the fourth distance of the sensor area is smaller than or equal to a preset second threshold.

[0081] In this embodiment, while the first distance D1 between the two side boundaries of the display substrate remains unchanged, the fourth distance D4 from the black matrix boundary to the second boundary of the black matrix of the color filter substrate is reduced, thereby increasing the distance from the frame boundary of the non-visible frame of the cover plate to the black matrix boundary, that is, increasing the second distance D2, thereby increasing the ratio of the second distance D2 to the first distance D1. When the fourth distance D4 is less than the second threshold, the ratio of the second distance D2 to the first distance D1 is greater than or equal to the first threshold. It is worth noting that those skilled in the art should understand that this application does not specifically limit the second threshold. Those skilled in the art should select an appropriate second threshold based on the specific structure of the display module in actual application, and will not be further described here.

[0082] In a specific example, Figure 1The display module shown in the figure has a distance of 0.9 mm between the two boundaries of the non-display area as an example for explanation, wherein the horizontal distance D5 from the side L5 of the first slot 53 away from the first boundary L1 to the first boundary L1 is 0.234. Taking into account the fitting tolerance of 0.132 between the cover plate and the display panel, and the horizontal distance from the side L5 of the first slot 53 away from the first boundary L1 to the frame boundary L3 of the cover plate is 0.361, the horizontal distance D3 from the frame boundary L3 to the first boundary L1 that meets the fitting tolerance is 0.727. In this case, the horizontal distance D2 from the frame boundary L3 to the black matrix boundary L4 is D1-D3-D4, wherein the fourth distance D4 is the horizontal distance from the black matrix boundary L4 to the second boundary L2. Therefore, in order to meet the requirements of the maximum viewing angle FOV, reducing the fourth distance D4 can increase the light leakage angle and reduce the risk of light leakage, that is, reducing the fourth distance D4 to increase the ratio of the second distance D2 to the first distance D1. As Figure 6 As shown in FIG. 1 , a schematic diagram of the upper frame of the display module is shown. In the area corresponding to the sensor area 33, that is, the position where the non-visible frame of the cover plate extends outward, the distance Y2 from the black matrix boundary L4 to L2 is smaller than the distance Y1 of the non-sensor area. In the figure, Y2 is the fourth distance D4 within the sensor area 33, and in the figure, Y1 is the fourth distance D4 of the non-sensor area. Y1 is usually 0.15 mm to 0.25 mm. The non-sensor area is the display substrate area outside the sensor area.

[0083] It is worth noting that this embodiment is only used to illustrate the specific implementation of this embodiment. Those skilled in the art should understand that the black matrix of the color filter substrate can be formed by a whole black matrix. Figure 6 The edge boundary L4 shown can also be as follows Figure 12 The non-aligned boundary is formed at the position corresponding to the boundary L4 by a regular or irregular block black matrix 511 arranged in multiple rows in an interlaced manner. The multiple rows of interlaced block black matrices reduce the risk of static electricity introduction on the one hand, and form good light-shielding performance on the other hand. Different black matrix designs are based on the basic design principle of meeting the requirements of the maximum viewing angle FOV, which are all within the scope of protection of this application and will not be repeated here.

[0084] Will Figure 4 Corresponding to Figure 1 In, obtain Figure 5 The light right triangle shown has a side length of D2 for the lower right angle, a side length of A for the side right angle, and an angle between the hypotenuse and the side right angle as the incident angle θ'. During the emission process, the light leakage is refracted at the incident angle θ' on the lower surface of the cover to form a refraction angle θ. According to Figure 4 The obtained formula is B=A*tan(arcsin(sinβ / 1.5))+tolerance, Figure 4 The B value in is Figure 1The difference between the third distance D3 and the fifth distance D5, that is, the distance between the frame boundary L3 and the first slot boundary L5, based on this distance, and the known first distance D1 and fifth distance D5, can be obtained to meet the maximum viewing angle FOV when the second distance D2 is obtained. Figure 1 The refraction angle in:

[0085]

[0086] In this embodiment, when A is at its thickest, 0.386 mm, and the maximum viewing angle FOV is greater than or equal to 30° (i.e., β is greater than or equal to 30°), the fourth distance Y2 within the sensor area must be less than or equal to 0.093 mm. When A is at its thinnest, 0.316 mm, and the maximum viewing angle FOV is greater than or equal to 30° (i.e., β is greater than or equal to 30°), the fourth distance Y2 within the sensor area must be less than or equal to 0.149 mm. In this embodiment, different second thresholds correspond to different thicknesses of A.

[0087] This embodiment reduces the distance (fourth distance) from the black matrix boundary in the sensor area to the second boundary of the non-display area away from the display area, increases the distance (second distance) from the frame boundary to the black matrix boundary, thereby improving the ratio of the second distance to the first distance, thereby increasing the light leakage angle, reducing the risk of light leakage, and meeting the angle of the maximum FOV.

[0088] Considering that the distances between the black matrix boundary in the sensor area and the non-sensor area and the second boundary are different in the above embodiment, in an optional embodiment, as shown in FIG. Figure 7 As shown, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the black matrix boundary L4 to the second boundary L2 is a fourth distance D4;

[0089] The fourth distance of the sensor area is equal to the fourth distance of the non-sensor area, and the fourth distance of the sensor area is less than or equal to a preset second threshold;

[0090] The black matrix 51 also includes a second groove 55 arranged on the side of the first groove 53 away from the first boundary L1, and the color film substrate 50 also includes a light-blocking material 54 filled in the second groove 55. The orthographic projection of the second groove 55 on the substrate falls within the orthographic projection of the non-visible border 81 on the substrate.

[0091] In this embodiment, the black matrix boundaries of the color filter substrate are all extended toward the second boundary. That is, the fourth distance of the color filter substrate is the same across the entire substrate and is less than or equal to the second threshold, thereby further ensuring that the display module's maximum FOV angle is free of light leakage. However, considering that the black matrix boundaries of the entire color filter substrate extend outward, there is a risk of introducing external static electricity, which could affect the stability and reliability of the display module. A second slot 55 is provided outside the first slot 53, relative to the display area, to cut off the black matrix and prevent the introduction of external static electricity. Furthermore, considering that the second slot 55 may introduce light leakage, particularly light entering from the edge and emitting through the second slot 55, the second slot is positioned near the second boundary. The orthographic projection of the second slot 55 on the substrate falls within the orthographic projection of the non-visible border on the substrate. Furthermore, a light-blocking material 54 is provided in the second slot 55 to prevent light from passing through.

[0092] Since the non-visible frame of the cover plate expands outward, there is a risk that the internal light of the display substrate is exposed. In an optional embodiment, in an optional embodiment, as Figure 7 As shown, the display module also includes a sealing glue 41 arranged between the display substrate 30 and the color film substrate 50 and close to the second boundary L2; the photosensor 31 is a thin film transistor arranged on the substrate, and the thin film transistor 31 includes a gate 37; the display module also includes a light shielding portion 36 arranged in the same layer as the gate 37 and insulated, and the light shielding portion 36 is arranged on the side of the gate 37 close to the second boundary L2, and the light shielding portion 36 extends to the sealing glue 41.

[0093] In this embodiment, the display module includes a backlight 10 disposed on the side of the display substrate away from the light output. Light passes through the display substrate, through the liquid crystal layer 40, and out of the color filter of the color filter substrate. To account for the potential for light leakage from the display substrate, the light sensor disposed on the substrate comprises a metal layer. The light sensor is a photosensitive thin-film transistor and includes a gate 37, with a light shielding portion disposed on the same layer as gate 37. Given that the color filter substrate includes a light-blocking black matrix, a light shielding portion is disposed on the side of gate 37 away from the display area and extends to the frame sealant 41. This prevents light leakage from within the display substrate, further improving the display effect.

[0094] To further improve the ratio of the second distance to the first distance, in another embodiment, as Figure 11 As shown, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, the distance from one side L5 of the first slot 53 away from the first boundary L1 to the first boundary L1 is a fifth distance D5; the fifth distance is less than or equal to a preset third threshold.

[0095] In order to reduce the light leakage problem of the display module at a wide viewing angle caused by the expansion of the non-visible frame, this embodiment moves the light sensor 31 closer to the first boundary L1, that is, shortens the distance between the light sensor 31 and the first boundary L1, so that the first groove is close to the first boundary L1. To ensure the light-sensitive area of ​​the light sensor, the distance from the boundary L5 of the first groove to the frame boundary L3 remains unchanged, and the frame boundary L3 is close to the first boundary L1, that is, the second distance D2 is increased. Figure 11 As shown, the frame boundary L3 shifts to the left, the slope of the light leakage light T1 changes, and the light leakage angle θ increases, which can prevent light leakage. At the same time, when the fifth distance D5 decreases while the first distance remains unchanged, the distance D3 also decreases and the distance D2 increases, thereby increasing the ratio of the second distance to the first distance, thereby reducing the risk of light leakage from the display module at wide viewing angles.

[0096] It should be noted that, depending on the specific structure of different display modules, this application does not specifically limit the third threshold value. Those skilled in the art should select an appropriate third threshold value based on actual application conditions, with avoiding the risk of light leakage as the design criterion, which will not be elaborated here.

[0097] Considering the electrostatic protection problem, in an optional embodiment, as Figure 8a and 8b As shown, the display module also includes an annular electrostatic ring, including a first electrostatic ring portion 342 corresponding to the sensor area, and a second electrostatic ring portion 341 outside the first electrostatic ring portion; the first electrostatic ring portion 342 is arranged in the display area on the side of the sensor area close to the display area; the second electrostatic ring portion 341 is arranged in the non-display area and surrounds the display area.

[0098] In this embodiment, due to the light leakage problem of the display module at a large viewing angle caused by the expansion of the non-visible frame, the distance from the sensor area 33 to the first boundary L1 is shortened, resulting in the occupation of the electrostatic ring position for electrostatic protection, such as Figure 8a The figure shows a schematic diagram of the upper frame of the display module, including the first boundary L1 and the second boundary L2 of the non-display area, wherein the area 90 is the electrostatic ring sinking area, including the first electrostatic ring portion 342 corresponding to the sensor area, Figure 8b for Figure 8a A top view of the display substrate in region 90 is shown, Figure 8b As shown, the electrostatic ring is divided into a first electrostatic ring portion 342 corresponding to the sensor area 33 and a second electrostatic ring portion 341 outside the first electrostatic ring portion 342, wherein the second electrostatic ring portion 341 is arranged in the non-display area, and the display unit 35 corresponding to the second electrostatic ring portion 341 is arranged in the display area; Figure 8a The 90 area shown in FIG. 1 shows that the first electrostatic ring portion 342 corresponding to the sensor area 33 is set in the display area after sinking, occupying two rows of pixel areas, as shown in FIG. Figure 8a As shown, a notch is formed; the first electrostatic ring portion 342 is used to protect the photosensors from damage due to static electricity. This embodiment, based on the previous embodiment shortening the photosensors to the first boundary L1, places the electrostatic ring corresponding to the sensor area in the display area. This further improves the stability and reliability of the display module while preventing light leakage at wide viewing angles, enhancing the user experience.

[0099] To reduce light leakage from the display module at wide viewing angles due to the expansion of the non-visible border, in an optional embodiment, in the sensor area, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, the distance from the black matrix boundary to the second boundary is a fourth distance; the fourth distance in the sensor area is smaller than the fourth distance in the non-sensor area, and is less than or equal to a preset second threshold.

[0100] On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from a side of the first groove away from the first boundary to the first boundary is a fifth distance; the fifth distance is less than or equal to a preset third threshold.

[0101] In this embodiment, combined with the above embodiments, Figure 1 As shown, while the first distance D1 remains unchanged, the fourth distance D4 and the fifth distance D5 are simultaneously reduced, and the second distance D2 is increased, thereby increasing the ratio of the second distance D2 to the first distance D1. This can solve the light leakage problem of the display module at a wide viewing angle caused by the expansion of the non-visible border, thereby improving the display effect of the display module. The specific implementation method is referred to the above embodiment and will not be repeated here.

[0102] In order to further improve the display effect of the display module and reduce the possible light leakage problem, in an optional embodiment, Figure 9 As shown, the display module also includes a backlight source 10 arranged on the side of the display panel 100 away from the cover plate 80; the display module also includes a light-shielding tape 101, and the light-shielding tape 101 covers the display panel 100 on the side of the sensor area away from the display area, partially covers the non-visible frame 81 at the corresponding position, and partially covers the backlight source 10 at the corresponding position.

[0103] To further avoid the light leakage problem caused by strong light outside the display module shining on the side of the display module, such as Figure 9As shown, strong external light T2, such as light leakage from the backlight source, can pass through the first polarizer, adhesive, and cover plate and exit the display substrate, causing light leakage at the edge of the display module. In this embodiment, considering strong external light T2, a light-shielding tape 101 is provided on the side of the display panel near the sensor area to prevent strong external light from entering, thereby preventing light leakage and further improving the display quality of the display module and user experience.

[0104] Based on the above display module, an embodiment of the present invention further provides a method for manufacturing the above display module, such as Figure 10 Shown, including:

[0105] A display panel is formed, the display panel comprising a display area disposed on a substrate and a non-display area surrounding the display area, the non-display area comprising a first boundary proximate to the display area and a second boundary distal from the display area, the display panel further comprising a sensor area disposed in the non-display area, the display panel comprising a display substrate and a color filter substrate, wherein the display substrate comprises a plurality of light-sensitive sensors in the sensor area; the color filter substrate comprises a black matrix, the black matrix comprising first grooves corresponding one-to-one to the light-sensitive sensors, and a black matrix boundary proximate to the second boundary;

[0106] A cover plate is formed to cover the display panel, the cover plate including a visible area and a non-visible frame surrounding the visible area, the non-visible frame including a frame boundary adjacent to the visible area, the orthographic projection of the display area on the substrate falling within the orthographic projection of the visible area on the substrate, and the orthographic projection of the sensor area on the substrate falling within the orthographic projection of the visible area on the substrate; within the sensor area, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a first distance is defined as the distance from the first boundary to the second boundary, a second distance is defined as the distance from the frame boundary to the black matrix boundary, and a ratio of the second distance to the first distance is greater than or equal to a preset first threshold.

[0107] The display module formed in this embodiment is based on a first distance between a first boundary close to the display area and a second boundary away from the display area in the non-display area of ​​the display substrate, and a second distance between a black matrix boundary of the black matrix of the color film substrate of the display module close to the second boundary and a frame boundary of the non-visible frame of the cover plate of the display module close to the first boundary. By increasing the ratio of the second distance to the first distance, the risk of light leakage of the display module at a wide viewing angle is reduced.

[0108] Another embodiment of the present invention provides a display device, which includes the display module of the above-mentioned embodiment of the present invention. The display device can be any product or component with a display function, such as electronic paper, mobile phone, tablet computer, television, monitor, laptop computer, digital photo frame, navigator, etc., and this embodiment does not limit this.

[0109] In response to the existing problems, the present invention develops a display module, a display device, and a manufacturing method. Based on a first distance between a first boundary close to the display area and a second boundary away from the display area in a non-display area of ​​a display substrate of the display module, and a second distance between a black matrix boundary of a black matrix of a color film substrate of the display module close to the second boundary and a frame boundary of a non-visible frame of a cover plate of the display module close to the first boundary, the risk of light leakage of the display module at a wide viewing angle is reduced by increasing the ratio of the second distance to the first distance. In particular, by increasing the ratio of the second distance to the first distance while reducing the distance between the black matrix and the second boundary, and by increasing the ratio of the second distance to the first distance while reducing the distance between the boundary of a sensor of the display substrate close to the display area and the first boundary, the light transmission angle of the display module can be effectively increased, and the risk of light leakage of the display module at a wide viewing angle can be reduced, thereby compensating for the problems existing in the prior art, effectively improving the display effect of the display module, improving the user experience, and having broad application prospects.

[0110] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not limitations on the implementation methods of the present invention. For ordinary technicians in the relevant field, other different forms of changes or modifications can be made based on the above description. It is impossible to list all the implementation methods here. All obvious changes or modifications derived from the technical solution of the present invention are still within the scope of protection of the present invention.

Claims

1. A display module, characterized in that: It includes a display panel and a cover plate covering the display panel, wherein: The cover plate includes a visible area and a non-visible frame surrounding the visible area, wherein the non-visible frame includes a frame boundary close to the visible area; The display panel includes a display area provided on a substrate and a non-display area surrounding the display area, wherein an orthographic projection of the display area on the substrate falls within an orthographic projection of the visible area on the substrate, and the non-display area includes a first boundary close to the display area and a second boundary away from the display area; The display module further includes a sensor area disposed in the non-display area and the visual area. The display panel includes a display substrate and a color filter substrate. In the sensor area, The display substrate includes a plurality of light-sensitive sensors; The color filter substrate includes a black matrix, the black matrix includes first slots corresponding to the photosensitive sensors one by one, and a black matrix boundary close to the second boundary; On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the first boundary to the second boundary is a first distance, a distance from the border boundary to the black matrix boundary is a second distance, and a ratio of the second distance to the first distance is greater than or equal to a preset first threshold; On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the border edge to the first edge is a third distance; The display module further includes a non-sensor area outside the sensor area, and the third distance of the sensor area is greater than the third distance of the non-sensor area; On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the boundary of the black matrix to the second boundary is a fourth distance; The fourth distance of the sensor area is smaller than the fourth distance of the non-sensor area, and the fourth distance of the sensor area is smaller than or equal to a preset second threshold.

2. The display module according to claim 1, wherein: The color filter substrate further includes a color filter disposed in the first groove, each photosensitive sensor includes a photosensitive area, and the orthographic projection of the first groove on the substrate covers the orthographic projection of the photosensitive area of ​​the corresponding photosensitive sensor on the substrate; The color filters in the first slots corresponding to different photosensors have different colors.

3. The display module according to claim 1, wherein: On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the boundary of the black matrix to the second boundary is a fourth distance; The fourth distance of the sensor area is equal to the fourth distance of the non-sensor area, and the fourth distance of the sensor area is less than or equal to a preset second threshold; The black matrix also includes a second groove arranged on a side of the first groove away from the first boundary, and the color film substrate also includes a light-blocking material filled in the second groove, and the orthographic projection of the second groove on the substrate falls into the orthographic projection of the non-visible frame on the substrate.

4. The display module according to claim 3, wherein: The display module further includes a frame sealant disposed between the display substrate and the color filter substrate and close to the second boundary; The light-sensitive sensor is a thin film transistor provided on the substrate, and the thin film transistor includes a gate; The display module further includes a light shielding portion that is provided in the same layer as the gate and is insulated. The light shielding portion is provided on a side of the gate close to the second boundary and extends to the frame sealant.

5. The display module according to claim 1, wherein: On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from a side of the first groove away from the first boundary to the first boundary is a fifth distance; The fifth distance is less than or equal to a preset third threshold.

6. The display module according to claim 5, wherein: The display module further includes an annular electrostatic ring, comprising a first electrostatic ring portion corresponding to the sensor area, and a second electrostatic ring portion outside the first electrostatic ring portion; The first electrostatic ring portion is arranged in the display area on one side of the sensor area close to the display area; The second electrostatic ring portion is disposed in the non-display area and surrounds the display area.

7. The display module according to claim 1, wherein: On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from the black matrix boundary to the second boundary is a fourth distance; the fourth distance of the sensor area is smaller than the fourth distance of the non-sensor area, and the fourth distance of the sensor area is smaller than or equal to a preset second threshold; On a cross section perpendicular to the substrate and in a direction horizontal to the substrate, a distance from a side of the first groove away from the first boundary to the first boundary is a fifth distance; the fifth distance is less than or equal to a preset third threshold.

8. The display module according to any one of claims 1 to 7, characterized in that: The display module further includes a backlight source disposed on a side of the display panel away from the cover plate; The display module further includes a light-shielding tape, which covers the display panel on the side of the sensor area away from the display area, partially covers the non-visible frame at the corresponding position, and partially covers the backlight source at the corresponding position.

9. A display device, characterized in that: The invention comprises a display module as claimed in any one of claims 1 to 8.

10. A method for manufacturing a display module according to any one of claims 1 to 8, characterized in that: include: A display panel is formed, the display panel comprising a display area disposed on a substrate and a non-display area surrounding the display area, the non-display area comprising a first boundary proximate to the display area and a second boundary distal from the display area, the display panel further comprising a sensor area disposed in the non-display area, the display panel comprising a display substrate and a color filter substrate, wherein the display substrate comprises a plurality of light-sensitive sensors in the sensor area; the color filter substrate comprises a black matrix, the black matrix comprising first grooves corresponding one-to-one to the light-sensitive sensors, and a black matrix boundary proximate to the second boundary; forming a cover plate covering the display panel, the cover plate including a visible area and a non-visible frame surrounding the visible area, the non-visible frame including a frame boundary adjacent to the visible area, the orthographic projection of the display area on the substrate falling within the orthographic projection of the visible area on the substrate, and the orthographic projection of the sensor area on the substrate falling within the orthographic projection of the visible area on the substrate; In the sensor area, on a cross section perpendicular to the substrate and in a direction horizontal to the substrate, the distance from the first boundary to the second boundary is a first distance, the distance from the border boundary to the black matrix boundary is a second distance, and the ratio of the second distance to the first distance is greater than or equal to a preset first threshold.

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