Display apparatus

Abstract

The present disclosure provides a display apparatus, comprising: a display substrate having a display area and a peripheral area located at the periphery of the display area, wherein a first light shielding layer and a plurality of photosensitive devices are provided in the display substrate; a protective cover plate provided on a light-exit side of the display substrate, the protective cover plate comprising a first view area and a first non-view area located at the periphery of the first view area, and a second light-shielding layer being provided on the first non-view area; and a backlight module provided on a non-light-exit side of the display substrate, the backlight module comprising a second view area and a second non-view area located at the periphery of the second view area, and a third light-shielding layer for shielding backlight from being emitted towards the display substrate being provided in the second non-view area, wherein the orthographic projections of at least two of the first light-shielding layer, the second light-shielding layer, and the third light-shielding layer on the display substrate partially overlap with the orthographic projection of at least one photosensitive device on the display substrate. The display apparatus provided by the present disclosure can improve the accuracy of ambient light intensity detection.

Description

A display device

[0001] Cross-references to related applications

[0002] This application claims priority to Chinese Patent Application No. 202411552323.1, filed in China on November 1, 2024, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This disclosure relates to the field of display technology, and more particularly to a display device. Background Technology

[0004] With the continuous development of display technology, the requirements for displays are becoming increasingly stringent. Light sensors, also known as photometric sensors or ambient light sensors, are used in display panels to detect the intensity of ambient light and adjust screen brightness to achieve an acceptable level for the human eye, thus saving energy. However, in related technologies, light sensors in display panels suffer from low accuracy in detecting ambient light. Summary of the Invention

[0005] This disclosure provides a display device that can improve the accuracy of ambient light detection by the light-sensing device in the display screen.

[0006] The technical solutions provided in this disclosure are as follows:

[0007] This disclosure provides a display device comprising:

[0008] The display substrate has a display area and a peripheral area located around the display area. The display substrate is provided with a first light-shielding layer and a plurality of light-sensing devices.

[0009] A protective cover plate is disposed on the light-emitting side of the display substrate, and the protective cover plate includes a first visible area and a first non-visible area located around the first visible area, wherein a second light-shielding layer is disposed on the first non-visible area; and

[0010] A backlight module is disposed on the non-light-emitting side of the display substrate, and the backlight module includes a second visible area and a second non-visible area located around the second visible area. A third light-shielding layer is provided in the second non-visible area to block backlight rays from emanating onto the display substrate.

[0011] The orthographic projection of at least two of the first light-shielding layer, the second light-shielding layer, and the third light-shielding layer onto the display substrate overlaps with the orthographic projection portion of at least one of the photosensitive devices onto the display substrate.

[0012] For example, the display substrate includes a color filter layer, which includes a plurality of filter units for filtering different colors of light and a black matrix layer located around the filter units; wherein the first light-shielding layer includes the black matrix layer.

[0013] For example, the second light-shielding layer includes at least one ink layer disposed in the first non-visible area.

[0014] For example, the third light-shielding layer includes a light-shielding adhesive disposed in the backlight module.

[0015] For example, the first light-shielding layer and the second light-shielding layer overlap with the orthographic projection portion of at least one of the photosensitive devices on the display substrate, and the first light-shielding layer and the second light-shielding layer are used to block ambient light from shining on at least one of the photosensitive devices.

[0016] For example, a plurality of the light-sensing devices include a first light-sensing device group for receiving ambient light and a second light-sensing device group for not receiving ambient light, wherein the first light-sensing device group and the second light-sensing device group each include at least one light-sensing device; wherein at least one of the first light-shielding layer and the second light-shielding layer is provided with a light-transmitting area and a light-shielding area; a light-transmitting area is provided with a light-filtering layer, and the light-filtering layer at least partially overlaps with the orthographic projection of the first light-sensing device group on the display substrate, and the light-shielding area at least partially overlaps with the orthographic projection of the second light-sensing device group on the display substrate.

[0017] For example, the first photosensitive device group includes a first photosensitive device, a second photosensitive device, and a third photosensitive device, which are used to detect different colors of light in the ambient light.

[0018] For example, in the direction perpendicular to the display substrate, the first light-sensing device group and the second light-sensing device group are both located in the overlapping area of ​​the peripheral area and the first non-visible area, and the first light-shielding layer and the second light-shielding layer are both provided with the light-transmitting area and the light-shielding area, and the orthographic projection of the first light-sensing device group and the light-transmitting area on the first light-shielding layer and the second light-shielding layer on the display substrate is at least partially overlapped, and the orthographic projection of the second light-sensing device group and the light-shielding area on the first light-shielding layer and the second light-shielding layer on the display substrate is at least partially overlapped.

[0019] For example, the first light-shielding layer has a plurality of first light-transmitting areas, and the second light-shielding layer has a plurality of second light-transmitting areas. The orthographic projections of the first light-transmitting areas and the second light-transmitting areas on the display substrate at least partially overlap, and the overlapping first light-transmitting areas and the second light-transmitting areas form a light-transmitting unit. Among them, one light-transmitting unit corresponds to one light-sensing device in the first light-sensing device group, and the filter layer is provided in at least one of the first light-transmitting areas and the second light-transmitting areas.

[0020] For example, in the second direction from the display area to the peripheral area and in the first direction perpendicular to the second direction, the centers of the first light-transmitting area, the second light-transmitting area and the corresponding light-sensing device coincide, and the orthogonal projection areas of the second light-transmitting area and the first light-transmitting area on the display substrate are both larger than the orthogonal projection area of ​​the effective photosensitive area of ​​the light-sensing device on the display substrate, and the second light-transmitting area is larger than the orthogonal projection area of ​​the first light-transmitting area on the display substrate.

[0021] For example, the dimension by which the orthographic projection of the second light-transmitting area on the display substrate extends outward relative to the orthographic projection of the effective photosensitive area of ​​the photosensitive device on the display substrate is greater than or equal to 0.361 mm.

[0022] For example, the first light-transmitting area is configured to transmit white light, and a first filter layer is provided in the first light-transmitting area.

[0023] For example, when the second light-shielding layer is an ink layer, the second light-shielding layer is provided with a second light-transmitting area, the second light-transmitting area is a hollow opening, and the first filter layer includes a colored ink layer disposed in the hollow opening.

[0024] For example, a plurality of light-sensing devices are arranged sequentially at intervals along a first direction, and a plurality of second light-transmitting areas are correspondingly and spaced apart from the plurality of light-sensing devices, wherein the first direction is the extension direction of the first side of the display substrate; wherein the size of the second light-transmitting area along the first direction is greater than or equal to 0.3 mm, and the distance between two adjacent second light-transmitting areas in the first direction is 0.3 to 0.5 mm.

[0025] For example, the orthographic projection shape of the second light-transmitting area on the display substrate is a rounded polygon, wherein the corner formed by two adjacent sides of the rounded polygon is a rounded chamfer, and the chamfer radius of the rounded chamfer is greater than or equal to 0.2 mm.

[0026] For example, the light-shielding area in the second light-shielding layer at least partially overlaps with the orthographic projection of the first light-filtering layer on the display substrate, and at at least one edge of the second light-transmitting area, the overlapping area of ​​the light-shielding areas of the first light-filtering layer and the second light-shielding layer has a dimension greater than or equal to 0.3 mm in a direction parallel to the display substrate.

[0027] For example, in a second direction from the display area to the peripheral area, the distance between the display area and the first filter layer is greater than or equal to 0.273 mm.

[0028] For example, a plurality of light-sensing devices are arranged sequentially at intervals along a first direction, and a plurality of second light-transmitting areas are correspondingly and spaced apart from the plurality of light-sensing devices, wherein the first direction is the extension direction of the first side of the display substrate; wherein the distance between the first filter layer corresponding to one of two adjacent light-sensing devices and the other on the display substrate along the first direction is greater than or equal to 0.361 mm.

[0029] For example, a plurality of the photosensitive devices are arranged sequentially at intervals along a first direction, the first direction being the extension direction of the first side of the display substrate; wherein the distance between two adjacent photosensitive devices in the first direction is greater than or equal to 1.022 mm.

[0030] For example, a second filter layer is provided in the first light-transmitting area, and the second light-transmitting area is configured to transmit white light.

[0031] For example, the orthographic projections of the display area and the first visible area on the display substrate at least partially overlap, and in a direction parallel to the display substrate, the first visible area is offset relative to the display area by a first predetermined distance toward the periphery of the display substrate; the orthographic projections of the display area and the second visible area on the display substrate at least partially overlap, and in a direction parallel to the display substrate, the second visible area is offset relative to the display area by a second predetermined distance toward the periphery of the display substrate.

[0032] For example, the first predetermined distance is 0.05 to 0.3 mm, and the second predetermined distance is 0.05 to 0.3 mm. For example, the second visible area has a first boundary line that intersects with the second non-visible area. When the orthographic projection of the photosensitive device on the display substrate is located within the orthographic projection area of ​​the second non-visible area on the display substrate, the effective photosensitive area of ​​the photosensitive device has a first edge close to the display area in a second direction from the display area to the peripheral area, wherein the distance between the first boundary line and the first edge along the second direction is greater than or equal to 0.404 mm.

[0033] The beneficial effects of the embodiments disclosed herein are as follows:

[0034] In the display device provided in this embodiment, by providing a plurality of light-sensing devices in the display substrate, the intensity of ambient light can be sensed to adjust the display brightness of the display substrate, thereby achieving the purpose of saving energy consumption. A first light-shielding layer is provided in the peripheral area of ​​the display substrate, a second light-shielding layer is provided in the first non-visible area of ​​the protective cover, and a third light-shielding layer is provided in the second non-visible area of ​​the backlight module. The orthographic projection of at least two of the first light-shielding layer, the second light-shielding layer, and the third light-shielding layer on the display substrate partially overlaps with the orthographic projection of at least one of the light-sensing devices on the display substrate.

[0035] The above-mentioned solutions include the following technical solutions:

[0036] In one technical solution, when the orthographic projections of the first and second light-shielding layers on the display substrate partially overlap with the orthographic projection of at least one photosensitive device on the display substrate, at least one photosensitive device is disposed in the first non-visible area in the direction perpendicular to the display substrate. This eliminates the need for reserved space between the display area and the first non-visible area for the photosensitive element, allowing for a smaller distance between them, thus meeting the requirements for wide viewing angle testing. Furthermore, on the side of the at least one photosensitive device closest to the light-emitting side of the display substrate, the first and second light-shielding layers can effectively block ambient light from reaching the photosensitive device, resulting in good light-shielding performance. This prevents the at least one photosensitive device from being affected by ambient light, enabling it to more accurately detect correction values ​​affected by parameters such as temperature, thereby correcting the detection values ​​of other photosensitive devices that detect ambient light and improving the accuracy of ambient light detection.

[0037] In another technical solution, when the orthographic projections of the first light-shielding layer and the third light-shielding layer on the display substrate partially overlap with the orthographic projection of at least one of the photosensitive devices on the display substrate, the first light-shielding layer can block ambient light from illuminating at least one of the photosensitive devices, making the at least one photosensitive device unaffected by ambient light. This allows the photosensitive device to more accurately detect correction values ​​affected by parameters such as temperature, and to correct the detection values ​​of other photosensitive devices used for detecting ambient light, thereby improving the accuracy of ambient light detection. Furthermore, at least one photosensitive device can be shielded from backlight by the third light-shielding layer to avoid backlight affecting the at least one photosensitive device, thus improving the accuracy of ambient light detection.

[0038] In another technical solution, when the orthographic projections of both the second and third light-shielding layers on the display substrate partially overlap with the orthographic projection of at least one photosensitive device on the display substrate, at least one photosensitive device is disposed in the first non-visible area in the direction perpendicular to the display substrate. This eliminates the need for reserved space between the display area and the first non-visible area for the photosensitive element, allowing for a smaller distance between them, thus meeting the requirements for wide viewing angle testing. Furthermore, the first and second light-shielding layers can block ambient light from reaching at least one photosensitive device, making it unaffected by ambient light. Therefore, this photosensitive device can more accurately detect correction values ​​affected by parameters such as temperature, which can then be used to correct the detection values ​​of other photosensitive devices used for detecting ambient light, thereby improving the accuracy of ambient light detection. Additionally, at least one photosensitive device can be shielded from backlight by the third light-shielding layer, preventing backlight from affecting it and further improving the accuracy of ambient light detection.

[0039] In another technical solution, when the orthographic projections of the first, second, and third light-shielding layers on the display substrate partially overlap with the orthographic projection of at least one photosensitive device on the display substrate, at least one photosensitive device is disposed in the first non-visible area in the direction perpendicular to the display substrate. This eliminates the need for reserved space between the display area and the first non-visible area for the photosensitive element, allowing for a smaller distance between them, thus meeting the requirements for wide viewing angle testing. Furthermore, the first and second light-shielding layers can block ambient light from reaching at least one photosensitive device, making it unaffected by ambient light. Therefore, this photosensitive device can more accurately detect correction values ​​affected by parameters such as temperature, which can then be used to correct the detection values ​​of other photosensitive devices used for detecting ambient light, thereby improving the accuracy of ambient light detection. Additionally, at least one photosensitive device can be shielded from backlight by the third light-shielding layer, preventing backlight from affecting it and further improving the accuracy of ambient light detection. Attached Figure Description

[0040] Figure 1 shows a front view of a display device in some embodiments of the present disclosure;

[0041] Figure 2 shows a cross-sectional view along the E-E' direction in Figure 1;

[0042] Figure 3 shows a cross-sectional view along the F-F' direction in Figure 1;

[0043] Figure 4 shows a magnified view of Q in Figure 1;

[0044] Figure 5 shows one of the schematic diagrams of the arrangement of the first filter layer in some embodiments of this disclosure;

[0045] Figure 6 shows one of the light schematic diagrams of a display device in some embodiments of this disclosure;

[0046] Figure 7 shows a second schematic diagram of the light source of the display device in some embodiments of this disclosure;

[0047] Figure 8 shows a third schematic diagram of the light source of the display device in some embodiments of this disclosure;

[0048] Figure 9 shows a second schematic diagram of the arrangement of the first filter layer in some embodiments of this disclosure;

[0049] Figure 10 shows the curves showing the relationship between the drain current of the black photosensitive device in the comparative example and the ambient light intensity.

[0050] Figure 11 shows the curves showing the relationship between the drain current of the black photosensitive device and the ambient light intensity in the test example;

[0051] Figure 12 shows the curves showing the relationship between the drain current of the green photosensitive device and the ambient light intensity in the comparative example;

[0052] Figure 13 shows the curves showing the relationship between the drain current of the green light sensor and the ambient light intensity in the test example. Detailed Implementation

[0053] To make the objectives, technical solutions, and advantages of the embodiments of this disclosure clearer, the technical solutions of the embodiments of this disclosure will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this disclosure. All other embodiments obtained by those skilled in the art based on the described embodiments of this disclosure without creative effort are within the scope of protection of this disclosure.

[0054] Unless otherwise defined, the technical or scientific terms used in this disclosure shall have the ordinary meaning understood by one of ordinary skill in the art to which this disclosure pertains. The terms “first,” “second,” and similar terms used in this disclosure do not indicate any order, quantity, or importance, but are merely used to distinguish different components. Similarly, the terms “an,” “a,” or “the,” and similar terms do not indicate a quantity limitation, but rather indicate the presence of at least one. The terms “including,” “comprising,” or “containing,” and similar terms mean that the element or object preceding the word encompasses the elements or objects listed following the word and their equivalents, without excluding other elements or objects. The terms “connected,” “linked,” or similar terms are not limited to physical or mechanical connections, but can include electrical connections, whether direct or indirect. The terms “upper,” “lower,” “left,” and “right,” etc., are used only to indicate relative positional relationships, and these relative positional relationships may change accordingly when the absolute position of the described objects changes.

[0055] The features such as "parallel," "perpendicular," and "identical" used in the embodiments of this disclosure include features in the strict sense of "parallel," "perpendicular," and "identical," as well as cases where "approximately parallel," "approximately perpendicular," and "approximately identical" include certain tolerances. Taking into account the measurement and the tolerances associated with the measurement of a specific quantity (e.g., limitations of the measurement system), they represent the acceptable deviation range for a specific value as determined by a person skilled in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of said value.

[0056] Furthermore, throughout this document, unless otherwise defined, the terms “substantially,” “essentially,” “approximately,” and “about” are used to describe and explain small variations. When used with an event or situation, these terms can cover situations where the event or situation occurs precisely or approximately. For example, when used with a numerical value, these terms can include a range of variation of the numerical value less than or equal to 10%, such as less than or equal to ±5%, less than or equal to ±4%, less than or equal to ±3%, less than or equal to ±2%, less than or equal to ±1%, less than or equal to ±0.5%, less than or equal to ±0.1%, or less than or equal to ±0.05%. The term “substantially coplanar” can refer to two surfaces arranged along the same plane within a micrometer range, for example, within 40 μm, 30 μm, 20 μm, 10 μm, or 1 μm.

[0057] It should be understood that, in the exemplary embodiments of this disclosure, when a layer or element is referred to as being on another layer or substrate, it may mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate. "A and B are set in the same layer" means that after A and B are formed using the same film deposition process to form a film layer for forming a specific pattern, the layer structure is formed in one patterning process using the same photomask.

[0058] With the continuous development of display technology, the requirements for displays are becoming increasingly stringent. Light sensors, also known as photometric sensors or ambient light sensors, are used in displays to detect the intensity of ambient light and adjust screen brightness to achieve an acceptable level for the human eye, thus saving energy. However, in related technologies, light sensors in displays suffer from low accuracy in detecting ambient light.

[0059] The applicant has discovered through research that one of the reasons for the aforementioned problems is:

[0060] In related technologies, photosensors can be implemented using either silicon-based photosensors or thin-film transistors (TFTs). Silicon-based photosensors are more expensive, while TFTs offer cost savings. Hereinafter, TFTs will be referred to simply as photosensing TFTs.

[0061] The sensing principle of a photosensitive TFT is as follows: when the gate of the photosensitive TFT is not energized, a certain voltage is supplied to the source, resulting in a drain current. By detecting the magnitude of the drain current (D), the intensity of ambient light can be reflected. However, the value of the drain current detected by the photosensitive TFT is affected not only by the intensity of ambient light but also by the ambient temperature. Therefore, it is necessary to eliminate the influence of ambient temperature on the detection results of the photosensitive TFT.

[0062] In related technologies, multiple photosensitive TFTs are set in the display panel. Some photosensitive TFTs are used to receive ambient light to detect the ambient light intensity; this part of the photosensitive TFTs can be called the first photosensitive device group. Another part of the photosensitive TFTs is configured not to receive ambient light and is used to detect changes in ambient temperature and their impact on the drain current; this part of the photosensitive TFTs can be called the second photosensitive device group.

[0063] The function of the second photosensitive device group is to provide a correction reference value for the influence of ambient temperature on the test results of the first photosensitive device group. By subtracting the drain current value of the second photosensitive device group from the drain current value detected by the first photosensitive device group, the influence of ambient temperature factor on the test results of the first photosensitive device group can be eliminated to a certain extent. This ensures that the test results of the first photosensitive device group are only affected by the light intensity of the ambient light, so as to accurately measure the light intensity of the ambient light.

[0064] A display device generally includes a display substrate, a protective cover plate disposed on the light-emitting side of the display substrate, and a backlight module disposed on the non-light-emitting side of the display substrate. The display substrate includes a display area (AA area) and a non-display area located around the display area; the protective cover plate includes a first view area (VA) and a first non-view area; the backlight module includes a second view area (VA) and a second non-view area.

[0065] Generally, the first visible area of ​​the protective cover, the second visible area of ​​the backlight module, and the display area of ​​the display substrate overlap at least partially in the direction perpendicular to the display substrate. The first non-visible area, the second non-visible area of ​​the backlight module, and the non-display area of ​​the display substrate overlap at least partially in the direction perpendicular to the display substrate. The first visible area and the second visible area extend outward relative to the display area, that is, a certain distance is maintained between the edge of the display area and the edge of the first visible area, and between the edge of the display area and the edge of the second visible area.

[0066] To meet the following design requirements for photosensitive TFTs in display substrates: minimize the increase in bezel width of the display device; ensure that the non-viewable area on the protective cover does not obstruct the photosensitive TFT, allowing it to receive ambient light; and avoid altering the existing structure of the backlight module to prevent impact on its structure. For example, changing the distance between the second viewable area and the second non-viewable area of ​​the backlight module could lead to the risk of bright line delamination. The photosensitive TFT is generally positioned between the display area of ​​the display substrate and the first non-viewable area of ​​the protective cover. This prevents the first non-viewable area of ​​the protective cover from blocking ambient light from entering the first photosensitive device group. For the second photosensitive device group, a light-shielding layer such as a black matrix in the display substrate can be used to block ambient light.

[0067] However, the inventors of this application have discovered through research that the above structural design has the following technical problems:

[0068] First, although the second photosensitive device group is shielded by a black matrix or other light-shielding layer on the light-emitting side facing the display substrate, this cannot completely block ambient light. Consequently, the drain current value detected by the second photosensitive device group is also affected by the intensity of ambient light. In other words, the second photosensitive device group is also affected by both ambient light intensity and ambient temperature. The drain current value it measures, used as a correction reference for ambient temperature influence, will contain errors, leading to a decrease in the accuracy of the ambient light intensity measured by the first photosensitive device group.

[0069] Secondly, in order not to change the structure of the backlight module, in the direction from the display area to the peripheral area, the first photosensitive device group and the second photosensitive device group are both located between the boundary of the display area of ​​the display substrate and the boundary of the second visible area of ​​the backlight module. This causes the light from the backlight module to also partially illuminate the photosensitive TFT, which in turn causes the magnitude of the drain current generated by the photosensitive TFT to vary not only with the influence of the ambient light but also with the light intensity of the backlight source, thus reducing the accuracy of the measured ambient light.

[0070] Thirdly, to prevent the first non-visible area on the protective cover from obstructing the photosensitive TFT, both the first and second photosensitive device groups are located within the first visible area of ​​the protective cover and outside the display area of ​​the display substrate. In other words, in the direction from the display area to the peripheral area, both the first and second photosensitive device groups are located between the boundary of the display area and the boundary of the first visible area. This necessitates a sufficient distance between the display area and the boundary of the first visible area to provide space for the arrangement of the photosensitive TFT. If this distance is too large, it will lead to an increase in the light leakage angle at wide viewing angles.

[0071] Taking a real product as an example, in a display device without a photosensitive TFT, the designed distance between the display area and the boundary of the first visible area of ​​the protective cover can be approximately 0.2 mm. If a photosensitive TFT is to be placed between the display area and the first visible area of ​​the protective cover, this distance needs to be increased by at least 0.13 mm. Specifically, ink is coated on the first non-visible area of ​​the protective cover. The ink screen printing tolerance of the first visible area of ​​the protective cover is ±0.1 mm (single-sided tolerance is ±0.05), the bonding accuracy of the protective cover is ±0.1 mm, and the tolerance between the ink opening and the first visible area of ​​the protective cover is ±0.1 mm. Therefore, the cumulative tolerance C = sqrt(0.05*0.05 + 0.1*0.1 + 0.07*0.07) = 0.132. Therefore, if a photosensitive TFT is to be placed between the display area and the first visible area of ​​the protective cover, this distance needs to be increased by at least 0.13 mm.

[0072] Therefore, compared to display devices without photosensitive TFTs, display devices with photosensitive TFTs require a design distance of 0.37mm between the boundary of the display area on the display substrate and the boundary of the first visible area of ​​the protective cover. This increases the risk of light leakage at wide viewing angles. For example, compared to display modules without photosensitive TFTs, the maximum light leakage angle changes from >90° (no light leakage at wide viewing angles) to a minimum light leakage angle of 54°, a reduction of 36°, thus increasing the risk of light leakage.

[0073] Furthermore, although the distance between the display area boundary of the display substrate and the first visible area boundary of the protective cover plate has increased, the FOV (Field of View) test still suffers from occlusion. For example, when the illumination angle exceeds a certain range (e.g., 30°–40°), the first non-visible area on the protective cover plate blocks the light, resulting in insufficient light directly illuminating the photosensitive TFT, causing a sudden decrease in the illuminance received by the photosensitive TFT. In other words, the FOV test does not meet the customer's 50° test angle specification, and the curve showing the relationship between the test angle and illuminance is not smooth. Moreover, the increased distance between the first visible area boundary on the protective cover plate and the display area of ​​the display substrate also affects the overall visual appearance of the device.

[0074] In view of this, in order to solve at least one of the problems in the above-mentioned related technologies, the present disclosure provides a display device.

[0075] As shown in Figures 1 to 3, the display module provided in this embodiment includes a display substrate 100, a protective cover plate 200, and a backlight module 300.

[0076] The display substrate 100 has a display area AA and a peripheral area NA located around the display area AA. The display area AA is the area of ​​the display substrate 100 used to display images. The shape of the display area AA can be rectangular or rounded rectangle, etc. A rounded rectangle refers to a rectangle whose four corners are rounded.

[0077] The display substrate 100 has a light-emitting side 100A and a non-light-emitting side 100B. The light-emitting side 100A of the display substrate 100 refers to the side of the display substrate 100 that can display an image. The non-light-emitting side 100B of the display substrate 100 refers to the side opposite to the light-emitting side 100A of the display substrate 100.

[0078] The display substrate 100 may include a first light-shielding layer 110 and a plurality of light-sensing devices 120. The first light-shielding layer 110 may refer to any light-shielding layer in the display substrate 100 located on the side of the light-emitting device 120 facing the light-emitting side 100A, and made of a light-shielding material.

[0079] For example, the display substrate 100 can be a liquid crystal display substrate, which may include an array substrate 101 and a color filter substrate 102 disposed opposite each other. The color filter substrate 102 may include a color filter layer 104, which includes a plurality of light filtering units 141 for filtering different colors of light and a black matrix layer 142 located around the light filtering units 141. The function of the black matrix layer 142 is to define a plurality of light-transmitting openings, in which the light filtering units 141 are disposed. The first light-shielding layer 110 may include, but is not limited to, the black matrix layer 142.

[0080] Please refer to Figures 2 and 3. In some embodiments, the photosensitive device 120 may be disposed on the array substrate 101, and the black matrix layer 142 may be located on the side of the color filter substrate 102 away from the light-emitting side 100A. However, the first light-shielding layer 110 is not limited to the black matrix layer 142, and the film layer positions of the first light-shielding layer 110 and the photosensitive device 120 in the display substrate 100 are not limited thereto.

[0081] By providing a plurality of light sensors 120 in the display substrate 100, the light sensors 120 can be used to sense the intensity of ambient light and adjust the display brightness of the display substrate 100 to achieve the purpose of saving energy.

[0082] The protective cover 200 is located on the light-emitting side 100A of the display substrate 100. The protective cover 200 refers to the transparent material (such as glass or plastic) covering the light-emitting side 100A of the display substrate 100, and its main function is to protect the display substrate 100 from physical damage, scratches or dirt.

[0083] The protective cover 200 may have a first visible area VA1 and a first non-visible area NVA1.

[0084] The visible area refers to the screen area that a user can see when using a display device, without being obstructed by the edges or other structures of the protective cover 200. The first visible area VA1 of the protective cover 200 is the area under the protective cover 200 where the user can actually see the displayed content. This area is typically designed to maximize the display effect. The bezel or edge design of the protective cover 200 may affect the size of the first visible area VA1.

[0085] The first non-visible area NVA1 of the protective cover 200 is located around the first visible area VA1. In other words, the first non-visible area NVA1 is the edge region of the protective cover 200, and the first non-visible area NVA1 serves to block light. Therefore, a second light-shielding layer 210 is provided on the first non-visible area NVA1. For example, the second light-shielding layer 210 may include, but is not limited to, an ink layer 211 coated on the protective cover 200.

[0086] The backlight module 300 is disposed on the non-light-emitting side 100B of the display substrate 100. The backlight module 300 is used to provide a backlight source for the display substrate 100.

[0087] The backlight module 300 includes a second visible area VA2 and a second non-visible area NVA2 located around the second visible area VA2. In other words, the second non-visible area NVA2 is the edge region of the backlight module 300. The second non-visible area NVA2 serves to block backlight rays from emanating onto the display substrate 100. The second non-visible area NVA2 may be provided with a third light-shielding layer 310 to achieve the light-shielding function. For example, the third light-shielding layer 310 may include, but is not limited to, a light-shielding adhesive 311 disposed in the backlight module 300.

[0088] The first visible area VA1, the second visible area VA2 and the display area AA are at least partially overlapped on the display substrate 100 by their orthogonal projections, and the first non-visible area NVA1, the second non-visible area NVA2 and the peripheral area NA are at least partially overlapped on the display substrate 100 by their orthogonal projections.

[0089] The projected areas of the first visible area VA1 and the second visible area VA2 on the display substrate 100 are larger than the area of ​​the display area AA. In other words, the first visible area VA1 and the second visible area VA2 extend outward relative to the display area AA. In the direction from the display area AA to the peripheral area NA, a first predetermined distance D1 is maintained between the boundary of the first visible area VA1 and the boundary of the display area AA, and a second predetermined distance D2 is maintained between the boundary of the second visible area VA2 and the boundary of the display area AA.

[0090] At least two of the first light-shielding layer 110, the second light-shielding layer 210, and the third light-shielding layer 310 have orthographic projections on the display substrate 100 that partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100. Specifically, at least the following four parallel embodiments are included:

[0091] In a first embodiment, the first light-shielding layer 110 and the second light-shielding layer 210 at least partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100. That is, in the direction perpendicular to the display substrate 100, the orthographic projection region of at least one photosensitive device 120 has the first light-shielding layer 110 and the second light-shielding layer 210.

[0092] When the orthographic projections of the first light-shielding layer 110 and the second light-shielding layer 210 on the display substrate 100 partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100, at least one photosensitive device 120 is disposed in the first non-visible area NVA1 in the direction perpendicular to the display substrate 100. Compared with the related art where all photosensitive devices 120 are disposed between the first non-visible area NVA1 and the display area AA, this is equivalent to moving at least one photosensitive device 120 to the first non-visible area NVA1. In this way, there is no need to reserve space for at least one photosensitive element between the display area AA and the first non-visible area NVA1. Therefore, the requirement for adaptability of the distance between the display area AA and the first non-visible area NVA1 is reduced.

[0093] In particular, when all the light-sensitive TFTs are moved outward to the area corresponding to the first non-visible area NVA1, the distance between the display area AA and the first non-visible area NVA1 can be reduced.

[0094] The distance between the display area AA and the first non-viewable area NVA1 will be referred to as the first predetermined distance D1. For example, the first predetermined distance D1 can be reduced to the distance design size in a display module without a light sensor 120, such as 0.2mm. This can meet the requirements of wide viewing angle testing and reduce the risk of light leakage.

[0095] Furthermore, when the orthographic projections of the first light-shielding layer 110 and the second light-shielding layer 210 on the display substrate 100 partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100, at least one photosensitive device 120 can be blocked from external ambient light irradiating the photosensitive device 120 by the first light-shielding layer 110 and the second light-shielding layer 210.

[0096] In particular, when the photosensitive device 120 used to test the influence of ambient temperature is moved to the area below the corresponding region of the first non-visible area NVA1, the photosensitive device 120 is not only shielded by the first light-shielding layer 110 inside the display substrate 100, but also by the second light-shielding layer 210 at the edge of the protective cover plate 200. The setting of the two light-shielding layers ensures the light-shielding effect and prevents the photosensitive device 120 from being affected by external ambient light. This allows the photosensitive device 120 to be affected only by ambient temperature, thus enabling more accurate detection of the correction reference value affected by ambient temperature. This can be used to correct the test results of other photosensitive devices 120 used to test the light intensity of external ambient light, thereby improving the accuracy of ambient light testing.

[0097] In the second embodiment, the first light-shielding layer 110 and the third light-shielding layer 310 overlap with the orthographic projection portion of at least one photosensitive device 120 on the display substrate 100. That is, in the direction perpendicular to the display substrate 100, the orthographic projection region of at least one photosensitive device 120 has the first light-shielding layer 110 and the third light-shielding layer 310. In this case, the first light-shielding layer 110 in the display substrate 100 can be used to block ambient light from illuminating at least one photosensitive device 120, so that the at least one photosensitive device 120 can detect a correction reference value affected by ambient temperature, and use it to correct the test results of other photosensitive devices 120 used to test the intensity of ambient light.

[0098] Meanwhile, on the side of at least one photosensitive device 120 near the non-light-emitting side 100B, the photosensitive device 120 is disposed in the second non-visible area NVA2 of the backlight module 300. The third light-shielding layer 310 can be used to block the light from the backlight source from shining on the photosensitive device 120, thereby avoiding the backlight light from affecting the test results of the at least one photosensitive device 120 and improving the accuracy of ambient light testing.

[0099] In the third embodiment, the second light-shielding layer 210 and the third light-shielding layer 310 overlap with the orthographic projection portion of at least one photosensitive device 120 on the display substrate 100. That is, in the direction perpendicular to the display substrate 100, the orthographic projection region of at least one photosensitive device 120 has the second light-shielding layer 210 and the third light-shielding layer 310. In this case, at least one photosensitive device 120 is disposed in the first non-visible area NVA1. Compared to the related art where all photosensitive devices 120 are disposed between the first non-visible area NVA1 and the display area AA, this is equivalent to moving at least one photosensitive device 120 outward to the first non-visible area NVA1. In this way, there is no need to reserve space for at least one photosensitive element between the display area AA and the first non-visible area NVA1. Therefore, the requirement for adaptability of the distance between the display area AA and the first non-visible area NVA1 is reduced.

[0100] In particular, when all photosensitive TFTs are moved outward to the area corresponding to the first non-viewable area NVA1, the first predetermined distance D1 between the display area AA and the first non-viewable area NVA1 can be reduced. For example, the first predetermined distance D1 can be reduced to the distance design size in a display module without photosensitive devices 120, such as 0.2mm. This satisfies the requirements for wide viewing angle testing and reduces the risk of light leakage.

[0101] Furthermore, the second light-shielding layer 210 on the protective cover plate 200 can be used to block ambient light from shining on at least one photosensitive device 120, so that the at least one photosensitive device 120 can detect a correction reference value affected by ambient temperature, and use the test results of other photosensitive devices 120 used to test the light intensity of ambient light to make corrections.

[0102] Meanwhile, on the side of at least one photosensitive device 120 near the non-light-emitting side 100B, the photosensitive device 120 is disposed in the second non-visible area NVA2 of the backlight module 300, so as to use the third light-shielding layer 310 to block the light from the backlight source, thereby avoiding the backlight source from affecting the at least one photosensitive device 120 and improving the accuracy of ambient light testing.

[0103] In the fourth embodiment of this disclosure, the orthographic projections of the first light-shielding layer 110, the second light-shielding layer 210, and the third light-shielding layer 310 on the display substrate 100 partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100. That is, in the direction perpendicular to the display substrate 100, the orthographic projection region of at least one photosensitive device 120 includes the first light-shielding layer 110, the second light-shielding layer 210, and the third light-shielding layer 310.

[0104] At this time, when the orthographic projections of the first light-shielding layer 110 and the second light-shielding layer 210 on the display substrate 100 partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100, at least one photosensitive device 120 is disposed in the first non-visible area NVA1 in the direction perpendicular to the display substrate 100. Compared with the related art where all photosensitive devices 120 are disposed between the first non-visible area NVA1 and the display area AA, this is equivalent to moving at least one photosensitive device 120 to the first non-visible area NVA1. In this way, there is no need to reserve space for at least one photosensitive element between the display area AA and the first non-visible area NVA1. Therefore, the requirement for adaptability of the distance between the display area AA and the first non-visible area NVA1 is reduced.

[0105] In particular, when all photosensitive TFTs are moved outward to the area corresponding to the first non-viewable area NVA1, the first predetermined distance D1 between the display area AA and the first non-viewable area NVA1 can be reduced. The distance between the display area AA and the first non-viewable area NVA1 will be referred to as the first predetermined distance D1 below. For example, the first predetermined distance D1 can be reduced to the distance design size in a display module without photosensitive devices 120. For example, the first predetermined distance D1 can be 0.2 mm. This satisfies the requirements for wide viewing angle testing and reduces the risk of light leakage.

[0106] Furthermore, when the orthographic projections of the first light-shielding layer 110 and the second light-shielding layer 210 on the display substrate 100 partially overlap with the orthographic projection of at least one photosensitive device 120 on the display substrate 100, at least one photosensitive device 120 can be blocked from external ambient light irradiating the photosensitive device 120 by the first light-shielding layer 110 and the second light-shielding layer 210.

[0107] In particular, when the photosensitive device 120 used to test the influence of ambient temperature is moved to the area corresponding to the first non-visible area NVA1, the photosensitive device 120 is not only shielded by the first light-shielding layer 110 inside the display substrate 100, but also by the second light-shielding layer 210 at the edge of the protective cover plate 200. The setting of the two light-shielding layers ensures the light-shielding effect and prevents the photosensitive device 120 from being affected by external ambient light, so that the photosensitive device 120 can only be affected by ambient temperature. Therefore, the correction reference value affected by ambient temperature can be detected more accurately to correct the test results of other photosensitive devices 120 used to test the light intensity of external ambient light, thereby improving the accuracy of ambient light testing.

[0108] Meanwhile, on the side of at least one photosensitive device 120 near the non-light-emitting side 100B, the photosensitive device 120 is disposed in the second non-visible area NVA2 of the backlight module 300, so as to use the third light-shielding layer 310 to block the light from the backlight source, thereby avoiding the backlight source from affecting the at least one photosensitive device 120 and improving the accuracy of ambient light testing.

[0109] As can be seen from the above, the display device provided in this disclosure can solve at least one technical problem in the related art.

[0110] As an exemplary embodiment, as shown in Figures 2 and 3, the first light-shielding layer 110 and the second light-shielding layer 210 overlap with the orthographic projection portion of at least one photosensitive device 120 on the display substrate 100. The first light-shielding layer 110 and the second light-shielding layer 210 are used to block ambient light from illuminating at least one photosensitive device 120. In this way, using two light-shielding layers to block ambient light from illuminating at least one photosensitive device 120 provides a better light-shielding effect than providing only one light-shielding layer above the photosensitive device 120 (on the side closer to the light-emitting side 100A).

[0111] As an exemplary embodiment, as shown in 1, a plurality of light sensing devices 120 may include a first light sensing device group 120A for receiving ambient light and a second light sensing device group 120B for not receiving ambient light.

[0112] The first photosensitive device group 120A and the second photosensitive device group 120B each include at least one photosensitive device 120. The main function of the first photosensitive device group 120A is to test the intensity of ambient light, and the main function of the second photosensitive device group 120B is to test the correction reference value of the influence of the ambient temperature factor.

[0113] At least one of the first light-shielding layer 110 and the second light-shielding layer 210 is provided with a light-transmitting area S1 and a light-shielding area S2. A light-transmitting area S1 is provided with a light-filtering layer S3, and the light-filtering layer S3 at least partially overlaps with the orthographic projection of the first photosensitive device group 120A on the display substrate 100. The light-shielding area S2 at least partially overlaps with the orthographic projection of the second photosensitive device group 120B on the display substrate 100. In this way, ambient light can pass through the light-filtering layer S3 in the light-transmitting area S1 and illuminate the photosensitive device 120 of the first photosensitive device group 120A, while the ambient light of the second photosensitive device group 120B is blocked by the light-shielding area S2.

[0114] For example, taking the first light-shielding layer 110 including a black matrix layer 142 as an example, when several groups of photosensitive devices 120 are all located below the black matrix layer 142, holes can be cut out on the black matrix layer 142 corresponding to the positions of each photosensitive device 120 in the first group of photosensitive devices 120A to form a light-transmitting area S1, and a filter layer S3 can be filled in the cut-out position. However, the positions on the black matrix layer 142 corresponding to the positions of the photosensitive devices 120 in the second group of photosensitive devices 120B are not cut out, so as to block the external ambient light from shining on the photosensitive devices 120 in the second group of photosensitive devices 120B.

[0115] Similarly, taking the second light-shielding layer 210 including the ink layer 211 as an example, when several groups of photosensitive devices 120 are all located below the ink layer 211, holes can be cut out on the ink layer 211 corresponding to the positions of each photosensitive device 120 in the first group of photosensitive devices 120A to form a light-transmitting area S1, and a filter layer S3 can be filled in the cut-out position. However, the ink layer 211 is not cut out at the positions corresponding to the photosensitive devices 120 in the second group of photosensitive devices 120B, so as to block the external ambient light from shining on the photosensitive devices 120 in the second group of photosensitive devices 120B.

[0116] As an exemplary embodiment, as shown in Figures 2 and 3, the first photosensitive device group 120A may include a first photosensitive device 121, a second photosensitive device 122 and a third photosensitive device 123, which are used to detect different colors of light in the ambient light.

[0117] In this embodiment, the filter layer S3 is configured to allow light of the corresponding color to pass through, corresponding to the photosensitive device 120 that detects different colors of light. For example, the first photosensitive device 121 is used to detect red light in the ambient light, the second photosensitive device 122 is used to detect green light in the ambient light, and the third photosensitive device 123 is used to detect blue light in the ambient light.

[0118] The photosensitive device 120 may include, but is not limited to, thin-film transistors, and the semiconductor material in the thin-film transistors may include, but is not limited to, a-Si (amorphous silicon), LTPS (low-temperature polycrystalline silicon), Oxide (oxide semiconductor), etc.

[0119] For ease of description, the first photosensitive device 121 will be referred to as the red photosensitive device, the second photosensitive device 122 as the green photosensitive device, and the third photosensitive device 123 as the blue photosensitive device. The photosensitive device 120 in the second photosensitive device group 120B will be referred to as the black photosensitive device. Correspondingly, the filter layer S3 above the red photosensitive device is a red filter layer, the filter layer S3 above the green photosensitive device is a green filter layer, and the filter layer S3 above the blue photosensitive device is a blue filter layer.

[0120] In this embodiment of the disclosure, the principle by which the plurality of photosensitive devices 120 realize the photosensitive function is as follows:

[0121] When ambient light shines on the first photosensitive device group 120A, the proportions of the three primary colors of ambient light—blue, green, and red—are different. The ambient light passes through the filter layer S3 and shines on the red, green, and blue photosensitive devices. The red photosensitive device receives the red light from the ambient light, the green photosensitive device receives the green light from the ambient light, and the blue photosensitive device receives the blue light from the ambient light.

[0122] When a thin-film transistor (TFT) is used as the photosensor 120, the TFT includes a gate, a source, and a drain. In the off-state, no voltage is applied to the gate of the photosensor 120. When any photosensor 120 is in the off-state, a certain voltage is supplied to the source, and a certain drain current is generated at the drain. Thus, by measuring the magnitude of the drain current, the intensity of ambient light can be measured.

[0123] Before conducting ambient light intensity testing, the correlation between the intensity of the test ambient light and the drain current can be obtained in advance. However, in actual use, there are many types of external ambient light, and the proportions of the three primary colors in different types of ambient light are different, which will differ from the proportions of the three primary colors in the test ambient light. Therefore, it is necessary to correct the actual external ambient light to the test ambient light. The specific correction algorithm can be as follows:

[0124] Beforehand, under a specific test ambient light, the drain current values ​​corresponding to different light intensities are collected, and the correspondence between the light intensity and the drain current magnitude under different test ambient light intensities is generated.

[0125] By pre-collecting the drain current values ​​of red and blue light sensors under different types of ambient light and different light intensities, the color temperature of the ambient light (i.e., the type of ambient light) can be determined.

[0126] The drain current values ​​of the green light sensor under different types of ambient light and different light intensities were collected in advance. Based on the different types of ambient light obtained from the above tests and the ambient light used in the pre-acquired light intensity vs. drain current relationship curve, light intensity correction coefficients for different types of ambient light can be obtained.

[0127] This light intensity correction coefficient allows for the correction of test results under actual ambient light based on the relationship curve between light intensity and drain current under the ambient light being tested, thereby achieving the purpose of detecting the light intensity of actual ambient light.

[0128] The correlation between ambient light intensity and drain current is established at a fixed ambient temperature. However, the drain current of the photosensitive device 120 is affected not only by the intensity of ambient light but also by the ambient temperature. By using a black photosensitive device, the influence of ambient temperature on the test results can be eliminated.

[0129] The black photosensitive device is shielded from ambient light by at least one of the first light-shielding layer 110 and the second light-shielding layer 210. Theoretically, the black photosensitive device is not exposed to ambient light. Therefore, the leakage current detected by the black photosensitive device can be considered to be affected only by the ambient temperature. In other words, the leakage current value detected by the black photosensitive device can be used as a correction reference value for the influence of the ambient temperature factor.

[0130] The drain current values ​​detected by the red, blue, and green light sensors, minus the correction reference value provided by the black light sensor, can be used as the test results for the red, blue, and green light sensors. This ensures that the test results of the red, blue, and green light sensors are only affected by the intensity of ambient light, thus accurately detecting the ambient light intensity.

[0131] As one embodiment, as shown in Figures 2 and 3, in the direction perpendicular to the display substrate 100, the first photosensitive device group 120A and the second photosensitive device group 120B are both located in the overlapping area of ​​the peripheral area NA and the first non-visible area NVA1. The first light-shielding layer 110 and the second light-shielding layer 210 are each provided with a light-transmitting area S1 and a light-shielding area S2. The orthographic projections of the first photosensitive device group 120A and the light-transmitting area S1 on either the first light-shielding layer 110 or the second light-shielding layer 210 on the display substrate 100 are partially overlapping. The orthographic projections of the second photosensitive device group 120B and the light-shielding area S2 on either the first light-shielding layer 110 or the second light-shielding layer 210 on the display substrate 100 are also partially overlapping.

[0132] In other words, the first photosensitive device group 120A and the second photosensitive device group 120B can both be set outside the display area AA, and in the area corresponding to the first non-visible area NVA1 of the protective cover plate 200.

[0133] With the above setup, no light sensor 120 needs to be placed between the boundary of the display area AA and the boundary of the first non-visible area NVA1. The first predetermined distance D1 between the boundary of the display area AA and the boundary of the first non-visible area NVA1 can be smaller, thereby meeting the requirements for large viewing angle testing and reducing the risk of light leakage.

[0134] In some embodiments, when all the photosensitive devices 120 are arranged at the corresponding positions in the first non-visible area NVA1, holes can be made in the second light-shielding layer 210 at the corresponding positions of the photosensitive devices 120 in the first photosensitive device group 120A, so that ambient light can shine on the first photosensitive device group 120A; while at the positions of the photosensitive devices 120 in the second photosensitive device group 120B, no holes are made in the second light-shielding layer 210, so as to block ambient light from shining on the second photosensitive device group 120B.

[0135] It should be understood that the above scheme, in which all photosensitive devices 120 are located in the first non-visible area NVA1, is only one example. In other embodiments not illustrated, only some photosensitive devices 120 may be located in the first non-visible area NVA1. For example, only the photosensitive devices 120 in the second photosensitive device group 120B may be located in the first non-visible area NVA1, and the first light-shielding layer 110 and the second light-shielding layer 210 may be used to jointly block ambient light from illuminating the photosensitive devices 120 in the second photosensitive device group 120B, thereby improving detection accuracy.

[0136] Furthermore, when the photosensitive device 120 in the first photosensitive device group 120A is located in the first non-visible area NVA1, a filter layer S3 of the corresponding color needs to be set for the red light photosensitive device, green light photosensitive device and blue light photosensitive device in the first photosensitive device group 120A.

[0137] The filter layer S3 can be disposed in the first light-shielding layer 110 or the second light-shielding layer 210. Referring to Figure 2, the first light-shielding layer 110 has several first light-transmitting areas S11, and the second light-shielding layer 210 has several second light-transmitting areas S12. The first light-transmitting areas S11 and the second light-transmitting areas S12 can be formed by perforations in their respective light-shielding layers.

[0138] The orthographic projections of the first light-transmitting area S11 and the second light-transmitting area S12 on the display substrate 100 at least partially overlap, and the overlapping first light-transmitting area S11 and the second light-transmitting area S12 form a light-transmitting unit S0. One light-transmitting unit S0 corresponds to one light-sensing device 120 in the first light-sensing device group 120A.

[0139] In one embodiment, a filter layer S3 is provided in both the first light-transmitting area S11 and the second light-transmitting area S12.

[0140] In another embodiment, the filter layer S3 may be provided only in the second light-transmitting area S12. That is, the first light-transmitting area S11 is configured to transmit white light, and the first filter layer S30 is provided in the second light-transmitting area S12.

[0141] In another embodiment, the filter layer S3 may be provided only in the first light-transmitting area S11. That is, a second filter layer is provided in the first light-transmitting area S11, and the second light-transmitting area S12 is configured to transmit white light.

[0142] Taking the example of setting a filter layer S3 only in the second light-transmitting area S12, please refer to Figure 2. The second light-shielding layer 210 can be an ink layer 211. The second light-shielding layer 210 is provided with a second light-transmitting area S12, which is a hollow opening. The first filter layer S30 may include a colored ink layer provided in the second light-transmitting area S12.

[0143] Taking the second light-shielding layer 210, which includes a black ink layer, as an example, the black ink layer can be coated onto the protective cover plate 200 by means of screen printing or other methods, and hollow openings are formed on the ink layer 211 corresponding to the positions of the red light sensor, green light sensor, and blue light sensor, respectively. The first light-filtering layer S30 can be a colored ink layer coated on the second light-transmitting area S12. The colored ink layer may include a red ink layer S31, a green ink layer S32, and a blue ink layer S33.

[0144] As one embodiment, as shown in FIG4, in the second direction Y from the display area AA to the peripheral area NA, and in the first direction X perpendicular to the second direction Y, the first light-transmitting area S11, the second light-transmitting area S12 and the effective photosensitive area of ​​the corresponding photosensitive device 120 coincide, and the orthographic projection area of ​​the second light-transmitting area S12 and the first light-transmitting area S11 on the display substrate 100 is larger than the orthographic projection area of ​​the effective photosensitive area of ​​the photosensitive device 120 on the display substrate 100, and the second light-transmitting area S12 is larger than the orthographic projection area of ​​the first light-transmitting area S11 on the display substrate 100.

[0145] In other words, the centers of the first light-transmitting area S11, the second light-transmitting area S12, and the effective photosensitive area of ​​the corresponding photosensitive device 120 coincide, which is beneficial for calculating the positional relationship between each film layer and the photosensitive device 120. However, this is not a limitation.

[0146] The second light-transmitting area S12 serves as the light incident area of ​​the photosensitive device 120. The size of the second light-transmitting area S12 needs to meet the FOV test requirements.

[0147] In some embodiments, as shown in FIG4, the dimension a that extends outward from the orthographic projection of the second light-transmitting area S12 on the display substrate 100 relative to the orthographic projection of the effective photosensitive area of ​​the photosensitive device 120 on the display substrate 100 can be greater than or equal to 0.361 mm.

[0148] The dimension by which the orthographic projection of the second light-transmitting area S12 on the display substrate 100 extends outward relative to the orthographic projection of the effective photosensitive area of ​​the photosensitive device 120 on the display substrate 100 is referred to as the first extension dimension a.

[0149] The specific calculation method for the first outward expansion dimension 'a' can be as follows:

[0150] The FOV test angle requirements are set as follows: the minimum standard for FOV angle is ±30°, and the maximum standard for FOV angle is ±50°. In order to meet the requirement of a large FOV angle of 50°, the black ink layer must not obstruct the photosensitive device 120 when the first external dimension a is at a large FOV angle θ1 = 50°.

[0151] Therefore, the first outward expansion dimension 'a' must satisfy the following formula:

[0152] a = T1 * tanθ2 + Δ1; where T1 is the distance between the protective cover 200 facing the light-emitting side 100A and the photosensitive device 120 in the direction perpendicular to the display substrate 100, Δ1 is the assembly tolerance of the protective cover 200, and when θ1 = 50°, θ2 = 30.7°.

[0153] Taking Figure 6 as an example, an optical adhesive layer 500, an upper polarizer layer 400, a color filter substrate 102, and a liquid crystal layer 103 may be provided between the photosensitive device 120 and the protective cover plate 200 in the display module. The size of T1 is the sum of the thicknesses of the optical adhesive layer 500, the upper polarizer layer 400, the color filter substrate 102, and the liquid crystal layer 103 in the direction perpendicular to the display substrate 100.

[0154] In some embodiments, T1 can be equal to 0.386 mm, therefore, the first outward expansion dimension a can be greater than or equal to 0.361 mm. That is, any side of the red ink layer S31, green ink layer S32, and blue ink layer S33 screen-printed on the protective cover 200 extends beyond the corresponding photosensitive device 120 by at least 0.361 mm.

[0155] It should be understood that the above is only an explanation of the calculation method of the first expansion dimension a for a specific example. The specific value of the first expansion dimension a is not limited to this. The value of the first expansion dimension a can be greater than or equal to 0.361 mm, and can be calculated according to the film thickness and other factors in the actual application.

[0156] Furthermore, in some embodiments, as shown in FIG1, a plurality of photosensitive devices 120 are arranged sequentially at intervals along a first direction X, where the first direction X is the extension direction of a first side of the display substrate 100. For example, the display substrate 100 may include a bonding side DA and a bonding opposite side DB disposed opposite to the bonding side DA, wherein a plurality of photosensitive devices 120 may be disposed on the bonding opposite side DB and arranged sequentially at intervals along the extension direction of the bonding opposite side DB. However, this is not a limitation.

[0157] Correspondingly, several second light-transmitting areas S12 are arranged at intervals with several light-sensing devices 120.

[0158] As shown in Figures 4 and 5, taking the example of coating the second light-transmitting area S12 with colored ink to form the first filter layer S30, considering the ink screen printing capability on the protective cover plate 200, the size of the second light-transmitting area S12 can be configured as follows:

[0159] The dimension b of the first light-transmitting area S11 along the first direction X is greater than or equal to 0.3 mm;

[0160] The distance c between two adjacent second light-transmitting areas S12 in the first direction X is 0.3 to 0.5 mm. This prevents ink from accumulating during screen printing and meets dimensional requirements.

[0161] In some embodiments, the orthographic projection shape of the second light-transmitting area S12 on the display substrate 100 is a rounded polygon, wherein the corner formed by two adjacent sides of the rounded polygon is a rounded chamfer, and the chamfer radius R of the rounded chamfer is greater than or equal to 0.2 mm.

[0162] Furthermore, considering the length of a single photosensitive device 120 along the first direction X, and the outward expansion of the first light-transmitting area S11 relative to the photosensitive device 120 along the first direction X, the length of the first filter layer S30 along the first direction X should satisfy the following relationship:

[0163] d = x + 2*a; where x is the length of a single photosensitive device 120 along the first direction X, and a is the outer dimension of the first light-transmitting area S11 relative to the photosensitive device 120 in the first direction X.

[0164] Furthermore, considering the ink screen printing process, the light-shielding area S2 (i.e., the coating area of ​​the black ink layer) in the second light-shielding layer 210 and the first light-filtering layer S30 (i.e., the coating area of ​​the color ink layer) at least partially overlap on the display substrate 100.

[0165] In one exemplary embodiment, at at least one edge of the second light-transmitting area S12, the dimension e of the overlapping area of ​​the first light-filtering layer S30 and the light-shielding area S2 of the second light-shielding layer 210 along the direction parallel to the display substrate 100 is greater than or equal to 0.3 mm.

[0166] Taking the first light-shielding layer 110 as black ink and the first light-filtering layer S30 as colored ink as an example, on the protective cover plate 200, a black ink layer can be screen-printed first, and then different colored ink layers can be screen-printed separately. Therefore, the black ink layer and the colored ink layer will have some overlap. In order to meet the requirements of the screen printing process, the overlap size e between the black ink layer and the colored ink layer is at least 0.3mm.

[0167] Furthermore, in some embodiments, as shown in Figures 4 and 8, the third predetermined distance f between the display area AA and the first filter layer S30 in the second direction Y from the display area AA to the peripheral area NA can be greater than or equal to 0.273 mm. However, this is not a limitation.

[0168] In addition, in some embodiments, as shown in FIG8, a plurality of photosensitive devices 120 are arranged sequentially at intervals along a first direction X, and a plurality of second light-transmitting areas S12 are correspondingly and spaced apart from the plurality of photosensitive devices 120, wherein the first direction X is the extension direction of the first side of the display substrate 100.

[0169] In this configuration, the distance g between the first filter layer S30 corresponding to one of two adjacent photosensitive devices 120 and the other on the display substrate 100 along the first direction X is greater than or equal to 0.361. This ensures that ambient light only illuminates one photosensitive device 120 in the first photosensitive device group 120A and does not illuminate other photosensitive devices 120.

[0170] Specifically, taking a red photosensitive device as an example, in order to ensure that when ambient light shines on the red photosensitive device, it will not interfere with other photosensitive devices 120 around it, under the requirement of an FOV of θ1 = 50°, the minimum distance between the red ink layer S31 and the other adjacent photosensitive device 120 needs to satisfy the following relationship:

[0171] gmin = T1 * tanθ2 + Δ1; where T1 is the distance between the protective cover 200 and the light-emitting side 100A on the side perpendicular to the display substrate 100 and the photosensitive device 120, and ΔT is the assembly tolerance of the protective cover 200. In some embodiments, when T1 equals 0.386 mm, gmin = 0.361, and the refraction angle of ambient light incident on the protective cover 200 is θ2. When θ1 = 50°, θ2 = 30.7°.

[0172] Taking the spacing c between each color filter layer S3 as 0.4±0.1mm as an example, the distance g between the first filter layer S30 corresponding to one of the two adjacent photosensitive devices 120 and the other on the display substrate 100 along the first direction X is the sum of c and gmin, and g equals 0.761mm.

[0173] Furthermore, several photosensitive devices 120 are arranged sequentially at intervals along the first direction X. Even if there is no interval between the red ink layer S31, the green ink layer S32, and the blue ink layer S33, the design requirement that any side of the red ink layer S31, the green ink layer S32, and the blue ink layer S33 extends beyond the corresponding photosensitive device 120 by at least 0.361 mm must be met.

[0174] Considering that the overlap size between the colored ink layer and the second light-shielding layer 210 is at least 0.3 mm, in some embodiments, as shown in FIG9, the distance h between two adjacent photosensitive devices 120 in the first direction X is greater than or equal to 1.022 mm. It should be understood that the above are merely examples, and are not limited to other embodiments.

[0175] In one specific embodiment, taking the second light-transmitting area S12 as an example where only the filter layer S3 is provided, please refer to Figures 4 and 5. x = 980 μm, y = 17 μm, i = 5 μm, j = 0.9~1.1 mm, where x is the length of a single photosensitive device 120 along the first direction X; y is the length of a single photosensitive device 120 along the second direction Y, which is perpendicular to the first direction X; i is the outward expansion dimension (second outward expansion dimension) of the first light-transmitting area S11 relative to the photosensitive device 120 in the first direction X; and j is the frame size of the display substrate 100.

[0176] The dimensions of the filter layer S3 are: c = 0.4 ± 0.1 mm, a = 0.361 mm, and m = 0.273 mm. Where c is the spacing between two adjacent first filter layers S30 along the first direction X, a is the first outward expansion dimension of the first filter layer S30 relative to the photosensitive device 120 along the second direction Y, and m is the minimum distance from the boundary of the display area AA along the second direction Y to the first filter layer S30. Using the above scheme, the bezel size j in the display device can be between 0.9 and 1.1 mm, which does not increase the bezel size compared to a display module without the photosensitive device 120.

[0177] It should be understood that the above is only an exemplary description of the positional relationship and size values ​​of the various film layers in the display device, and is not intended to be limited thereto.

[0178] Furthermore, in some embodiments of this disclosure, when the first filter layer S30 is a colored ink layer, the higher the ink transmittance of the colored ink layer, the better. For example, the transmittance of the colored ink layer corresponding to each color can be greater than 30% within its respective wavelength range. The specific transmittance can be determined based on actual sample testing.

[0179] Furthermore, in some embodiments, taking the first non-visible area NVA1 of the protective cover plate 200, where both the first photosensitive device group 120A and the second photosensitive device group 120B are located, as an example, the orthographic projections of the display area AA and the first visible area VA1 on the display substrate 100 at least partially overlap, and in the direction parallel to the display substrate 100, the first visible area VA1 is offset relative to the display area AA towards the periphery of the display substrate 100 by a first predetermined distance D1. The first predetermined distance D1 is the distance between the boundary of the first visible area VA1 and the boundary of the display area AA. For example, the first predetermined distance D1 can be 0.05 to 0.3 mm. For instance, the first predetermined distance D1 can be 0.2 mm.

[0180] By moving each light sensor 120 outward to the first non-visible area NVA1 of the protective cover plate 200, the distance between the boundary of the first visible area VA1 and the boundary of the display area AA can be reduced. The first predetermined distance D1 is small, which can meet the requirements of a large viewing angle and reduce the risk of light leakage.

[0181] In some embodiments, taking the second non-visible area NVA2 of the backlight module 300, where both the first photosensitive device group 120A and the second photosensitive device group 120B are disposed, as an example, the orthographic projections of the display area AA and the second visible area VA2 on the display substrate 100 at least partially overlap, and in the direction parallel to the display substrate 100, the second visible area VA2 is offset relative to the display area AA towards the periphery of the display substrate 100 by a second predetermined distance D2. For example, the second predetermined distance D2 can be 0.05 to 0.3 m, for example, the second predetermined distance D2 is 0.23 mm.

[0182] By moving each photosensitive device 120 outward to the second non-visible area NVA2 of the protective cover plate 200, the second visible area VA2 can be shifted relative to the display area AA in the direction closer to the periphery of the display substrate 100 by a second predetermined distance D2. In order to block backlight light from entering the photosensitive device 120 by the third light-shielding layer 310 on the backlight module 300 while meeting the structural assembly requirements of the backlight module 300 itself.

[0183] Furthermore, as shown in Figure 6, the second visible area VA2 has a first boundary line VA21 that intersects with the second non-visible area NVA2. When the orthographic projection of the photosensitive device 120 on the display substrate 100 is located within the orthographic projection area of ​​the second non-visible area NVA2 on the display substrate 100, the effective photosensitive area of ​​the photosensitive device 120 has a first edge 1201 close to the display area AA in the second direction Y from the display area AA to the peripheral area NA. The distance between the first boundary line VA21 and the first edge 1201 along the second direction Y is referred to as the third predetermined distance D3.

[0184] To minimize the impact of backlight on the photosensitive device 120, the value of the third predetermined distance D3 needs to be limited. For example, the value of the third predetermined distance D3 can be greater than or equal to 0.404 mm.

[0185] Specifically, generally speaking, the light divergence angle of the backlight module 300 is within 45°. Backlight rays exceeding 45° have very low brightness and can be blocked by the metal light-shielding layer on the display substrate 100. Therefore, the design should primarily avoid light with a divergence angle of 45° directly hitting the photosensitive device 120. Referring to the light diagram shown in Figure 6, the third predetermined distance D3 needs to satisfy the following relationship:

[0186] D3 = T2 / tanα + Δ2; where T2 is the distance between the photosensitive device 120 and the backlight module 300 along the direction perpendicular to the display substrate 100, Δ2 is the assembly tolerance of the backlight module 300, and α is the divergence angle of the backlight rays, for example, 45°.

[0187] In some embodiments, when T2 = 0.237 mm, D3 = 0.404 mm. However, this is not a limitation.

[0188] In some embodiments, taking FIG6 as an example, a lower polarizer layer 600 and an array substrate 101 may be provided between the photosensitive device 120 and the third light-shielding layer 310 of the backlight module 300 in the display module. The size of T2 is the sum of the thicknesses of the lower polarizer layer 600 and the film layer located below the photosensitive device 120 in the array substrate 101 in the direction perpendicular to the display substrate 100. However, this is not a limitation.

[0189] For any large viewing angle of external ambient light on the display side of the display device, it must be blocked by the first non-visible area NVA1 on the protective cover 200 to prevent it from shining on the light sensor 120.

[0190] In some embodiments, as shown in FIG7, the first predetermined distance D1 can be 0.23mm, the second predetermined distance D2 can be greater than or equal to 0.404mm, the first outward expansion dimension a can be 0.2mm, then D4=0.23+0.404-0.2=0.434mm, and D4 is the distance along the second direction Y between the first light-transmitting area S11 and the first visible area VA1 on the first light-shielding layer 110.

[0191] Taking the above dimensions as an example, we verify whether ambient light entering from the first visible area VA1 will illuminate the photosensitive device 120. Please refer to Figure 7. Let the illumination angle of the ambient light be β1, and the refraction angle of the ambient light after it incident on the protective cover 200 be β2. Taking D4 equal to 0.404 mm as an example, then β2 = arctan(0.434 / 0.386) = 48.35°, sinβ1 = 1.5*sinβ2, and we know that β1 > 90°. That is, ambient light entering from the first visible area VA1 will not illuminate the photosensitive device 120.

[0192] A display device in which each light sensor 120 is disposed in the first non-visible area NVA1 is used as a test example, and a display device in which each light sensor 120 is disposed between the display area AA and the first non-visible area NVA1 is used as a control example.

[0193] The leakage current of the black photosensitive device in the test example and control example was tested, and the corresponding data between the leakage current of the black photosensitive device and the ambient light intensity are shown in Tables 1 and 2, and the corresponding curves are shown in Figures 10 and 11. Tables 1 and 11 show the test results of the test example, and Tables 2 and 12 show the test results of the control example. In Figures 11 and 12, the horizontal axis represents the ambient light intensity, and the vertical axis represents the leakage current value of the black photosensitive device.

[0194] Table 1

[0195] Table 2

[0196] As can be seen from Tables 1 and 2, and Figures 11 and 12, compared with the comparative example, the display device provided in the embodiments of this disclosure can be affected only by the ambient temperature, and not by the intensity of the ambient light.

[0197] Using the same backlight module 300, the leakage current of the green light sensor in both the test and control examples was tested. The corresponding data between the drain current of the green light sensor and the backlight brightness are shown in Tables 3 and 4, and the corresponding curves are shown in Figures 12 and 13. Tables 3 and 12 show the test results for the test examples, while Tables 4 and 13 show the test results for the control examples. In Figures 12 and 13, the horizontal axis represents the backlight brightness, and the vertical axis represents the drain current value of the green light sensor.

[0198] Table 3

[0199] Table 4

[0200] As can be seen from Tables 3 and 4, and Figures 12 and 13, compared with the comparative example, in the display device provided by the embodiments of this disclosure, the magnitude of the drain current detected by the green light sensor is not affected by the backlight brightness.

[0201] Furthermore, it should be noted that the display devices provided in the embodiments of this disclosure include, but are not limited to, smartphones, monitors, laptops, tablets, electronic photo frames, dashcams, smart wearable devices, and other devices with display functions. Other essential components of the display device (such as driver chips) are readily understood by those skilled in the art and will not be described in detail here, nor should they be construed as limiting the scope of this disclosure.

[0202] The following points need to be explained:

[0203] (1) The accompanying drawings of the embodiments of this disclosure only involve the structures involved in the embodiments of this disclosure. Other structures can be referred to the general design.

[0204] (2) For clarity, the thickness of layers or regions is enlarged or reduced in the drawings used to describe embodiments of the present disclosure, i.e., these drawings are not drawn to actual scale. It will be understood that when an element such as a layer, film, region or substrate is referred to as being “above” or “below” another element, the element may be “directly” located “above” or “below” the other element or there may be intermediate elements.

[0205] (3) Where there is no conflict, the embodiments of this disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0206] The above are merely specific embodiments of this disclosure, but the scope of protection of this disclosure is not limited thereto. The scope of protection of this disclosure shall be determined by the scope of the claims.

Claims

1. A display device, characterized in that, include: The display substrate has a display area and a peripheral area located around the display area. The display substrate is provided with a first light-shielding layer and a plurality of light-sensing devices. A protective cover plate is disposed on the light-emitting side of the display substrate, and the protective cover plate includes a first visible area and a first non-visible area located around the first visible area, wherein a second light-shielding layer is disposed on the first non-visible area; and A backlight module is disposed on the non-light-emitting side of the display substrate, and the backlight module includes a second visible area and a second non-visible area located around the second visible area. A third light-shielding layer is provided in the second non-visible area to block backlight rays from emanating onto the display substrate. The orthographic projection of at least two of the first light-shielding layer, the second light-shielding layer, and the third light-shielding layer onto the display substrate overlaps with the orthographic projection portion of at least one of the photosensitive devices onto the display substrate.

2. The display device according to claim 1, characterized in that, The display substrate includes a color filter layer, which includes multiple filter units for filtering different colors of light and a black matrix layer located around the filter units; wherein the first light-shielding layer includes the black matrix layer.

3. The display device according to claim 1, characterized in that, The second light-shielding layer includes: At least one ink layer is disposed in the first non-visible area.

4. The display device according to claim 1, characterized in that, The third light-shielding layer includes a light-shielding adhesive disposed in the backlight module.

5. The display device according to claim 1, characterized in that, The first light-shielding layer and the second light-shielding layer overlap with the orthographic projection portion of at least one of the photosensitive devices on the display substrate. The first light-shielding layer and the second light-shielding layer are used to block ambient light from shining on at least one of the photosensitive devices.

6. The display device according to claim 1, characterized in that, The plurality of light-sensing devices include a first light-sensing device group for receiving ambient light and a second light-sensing device group for not receiving ambient light, wherein the first light-sensing device group and the second light-sensing device group each include at least one light-sensing device; wherein at least one of the first light-shielding layer and the second light-shielding layer is provided with a light-transmitting area and a light-shielding area; a light-transmitting area is provided with a light-filtering layer, and the light-filtering layer at least partially overlaps with the orthographic projection of the first light-sensing device group on the display substrate, and the light-shielding area at least partially overlaps with the orthographic projection of the second light-sensing device group on the display substrate.

7. The display device according to claim 6, characterized in that, The first photosensitive device group includes a first photosensitive device, a second photosensitive device, and a third photosensitive device, which are used to detect different colors of light in the ambient light.

8. The display device according to claim 6, characterized in that, In the direction perpendicular to the display substrate, the first light-sensing device group and the second light-sensing device group are both located in the overlapping area of ​​the peripheral area and the first non-visible area, and the first light-shielding layer and the second light-shielding layer are both provided with the light-transmitting area and the light-shielding area, and the orthographic projection of the first light-sensing device group and the light-transmitting area on the first light-shielding layer and the second light-shielding layer on the display substrate is at least partially overlapping, and the orthographic projection of the second light-sensing device group and the light-shielding area on the first light-shielding layer and the second light-shielding layer on the display substrate is at least partially overlapping.

9. The display device according to claim 6, characterized in that, The first light-shielding layer has a plurality of first light-transmitting areas, and the second light-shielding layer has a plurality of second light-transmitting areas. The orthographic projections of the first light-transmitting areas and the second light-transmitting areas on the display substrate at least partially overlap, and the overlapping first light-transmitting areas and the second light-transmitting areas form a light-transmitting unit. Each light-transmitting unit corresponds to a light-sensing device in the first light-sensing device group, and the filter layer is provided in at least one of the first light-transmitting areas and the second light-transmitting areas.

10. The display device according to claim 9, characterized in that, In the second direction from the display area to the peripheral area and in the first direction perpendicular to the second direction, the centers of the first light-transmitting area, the second light-transmitting area and the effective photosensitive area of ​​the corresponding photosensitive device coincide, and the orthographic projection areas of the second light-transmitting area and the first light-transmitting area on the display substrate are both larger than the orthographic projection area of ​​the effective photosensitive area of ​​the photosensitive device on the display substrate, and the second light-transmitting area is larger than the orthographic projection area of ​​the first light-transmitting area on the display substrate.

11. The display device according to claim 10, characterized in that, The dimension by which the orthographic projection of the second light-transmitting area on the display substrate extends outward relative to the orthographic projection of the effective photosensitive area of ​​the photosensitive device on the display substrate is greater than or equal to 0.361 mm.

12. The display device according to claim 9, characterized in that, The first light-transmitting area is configured to transmit white light, and the second light-transmitting area is provided with a first filter layer.

13. The display device according to claim 12, characterized in that, When the second light-shielding layer is an ink layer, the second light-transmitting area is provided on the second light-shielding layer, the second light-transmitting area is a hollow opening, and the first filter layer includes a colored ink layer disposed in the hollow opening.

14. The display device according to claim 13, characterized in that, A plurality of light-sensing devices are arranged sequentially at intervals along a first direction, and a plurality of second light-transmitting areas are correspondingly and spaced apart from the plurality of light-sensing devices. The first direction is the extension direction of the first side of the display substrate. The size of the second light-transmitting area along the first direction is greater than or equal to 0.3 mm, and the distance between two adjacent second light-transmitting areas in the first direction is 0.3 to 0.5 mm.

15. The display device according to claim 14, characterized in that, The orthographic projection shape of the second light-transmitting area on the display substrate is a rounded polygon, wherein the corner formed by two adjacent sides of the rounded polygon is a rounded chamfer, and the chamfer radius of the rounded chamfer is greater than or equal to 0.2 mm.

16. The display device according to claim 13, characterized in that, The light-shielding area in the second light-shielding layer at least partially overlaps with the orthographic projection of the first light-filtering layer on the display substrate, and at at least one edge of the second light-transmitting area, the overlapping area of ​​the light-shielding areas of the first light-filtering layer and the second light-shielding layer has a dimension greater than or equal to 0.3 mm in the direction parallel to the display substrate.

17. The display device according to claim 13, characterized in that, In a second direction from the display area to the peripheral area, the distance between the display area and the first filter layer is greater than or equal to 0.273 mm.

18. The display device according to claim 12, characterized in that, A plurality of photosensitive devices are arranged sequentially at intervals along a first direction, and a plurality of second light-transmitting areas are correspondingly and spaced apart from the plurality of photosensitive devices. The first direction is the extension direction of the first side of the display substrate. The distance between the first filter layer corresponding to one of two adjacent photosensitive devices and the effective photosensitive area of ​​the other on the display substrate along the first direction is greater than or equal to 0.361 mm.

19. The display device according to claim 12, characterized in that, A plurality of the photosensitive devices are arranged sequentially at intervals along a first direction, the first direction being the extension direction of the first side of the display substrate; wherein the distance between two adjacent photosensitive devices in the first direction is greater than or equal to 1.022 mm.

20. The display device according to claim 9, characterized in that, A second filter layer is provided in the first light-transmitting area, and the second light-transmitting area is configured to transmit white light.

21. The display device according to claim 9, characterized in that, The orthographic projections of the display area and the first visible area on the display substrate at least partially overlap, and in a direction parallel to the display substrate, the first visible area is offset relative to the display area by a first predetermined distance toward the periphery of the display substrate; the orthographic projections of the display area and the second visible area on the display substrate at least partially overlap, and in a direction parallel to the display substrate, the second visible area is offset relative to the display area by a second predetermined distance toward the periphery of the display substrate.

22. The display device according to claim 21, characterized in that, The first predetermined distance is 0.05 to 0.3 mm, and the second predetermined distance is 0.05 to 0.3 mm.

23. The display device according to claim 1, characterized in that, The second visible area has a first boundary line that intersects with the second non-visible area. When the orthographic projection of the photosensitive device on the display substrate is located within the orthographic projection area of ​​the second non-visible area on the display substrate, the effective photosensitive area of ​​the photosensitive device has a first edge close to the display area in a second direction from the display area to the peripheral area, wherein the distance between the first boundary line and the first edge along the second direction is greater than or equal to 0.404 mm.

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