Display device

Abstract

The utility model provides a display device which comprises a display substrate which is provided with a display area and a peripheral area located on the periphery of the display area, and a first light shielding layer and a plurality of light sensing devices are arranged in the display substrate; the protective cover plate is arranged on the light emitting side of the display substrate, the protective cover plate comprises a first visible area and a first non-visible area located on the periphery of the first visible area, and a second light shielding layer is arranged on the first non-visible area; the backlight module is arranged on the non-light-emitting side of the display substrate, the backlight module comprises a second visible area and a second non-visible area located on the periphery of the second visible area, and the second non-visible area is provided with a third light shielding layer used for shielding backlight rays from emitting to 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 on the display substrate is partially overlapped with the orthographic projection of at least one light sensing device on the display substrate. The display device provided by the utility model can improve the detection accuracy of the ambient light intensity.

Description

Technical Field

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

[0002] With the continuous advancement of display technology, the requirements for display screens are becoming increasingly stringent. Light sensors are called photometric sensors or light sensors. These sensors can be installed in display panels to sense the intensity of ambient light and adjust screen brightness to a level acceptable to the human eye, thereby achieving energy savings. However, related technologies have shown that light sensors in display panels have limited accuracy in detecting ambient light. Utility Model Content

[0003] Embodiments of the present disclosure provide a display device capable of improving the detection accuracy of ambient light by a light-sensing device in a display screen.

[0004] The technical solutions provided by the embodiments of the present disclosure are as follows:

[0005] In an embodiment of the present disclosure, a display device is provided, comprising:

[0006] A display substrate having a display area and a peripheral area located outside the display area, wherein a first light shielding layer and a plurality of light sensing devices are provided in the display substrate;

[0007] a protective cover plate, disposed on the light-emitting side of the display substrate, and comprising a first visible area and a first non-visible area located outside the first visible area, wherein a second light-shielding layer is disposed on the first non-visible area; and

[0008] A backlight module is provided 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 outside the second visible area, and a third light-shielding layer is provided in the second non-visible area for blocking the backlight from being emitted toward the display substrate; wherein,

[0009] 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.

[0010] Exemplarily, the display substrate includes a color filter layer, the color filter layer includes a plurality of filter units for filtering light of different colors, and a black matrix layer located outside the filter units; wherein the first light-shielding layer includes the black matrix layer.

[0011] Exemplarily, the second light-shielding layer includes: at least one ink layer provided in the first non-visible area.

[0012] Exemplarily, the third light-shielding layer includes light-shielding glue provided in the backlight module.

[0013] Exemplarily, the first light-shielding layer and the second light-shielding layer partially overlap with the orthographic projection of at least one photosensitive device on the display substrate, and the first light-shielding layer and the second light-shielding layer are used to block external ambient light from irradiating at least one photosensitive device.

[0014] Exemplarily, several of the photosensitive devices include a first photosensitive device group for receiving external ambient light, and a second photosensitive device group for not receiving external ambient light, and the first photosensitive device group and the second photosensitive device group each include at least one photosensitive 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 filter layer is provided in the light-transmitting area, and the filter layer at least partially overlaps with the orthographic projection of the first photosensitive device group on the display substrate, and the light-shielding area at least partially overlaps with the orthographic projection of the second photosensitive device group on the display substrate.

[0015] Exemplarily, the first photosensitive device group includes a first photosensitive device, a second photosensitive device and a third photosensitive device, and the first photosensitive device, the second photosensitive device and the third photosensitive device are used to respectively detect different colors of light in the external ambient light.

[0016] Exemplarily, in a direction perpendicular to the display substrate, the first photosensitive device group and the second photosensitive device group are both located in the overlapping area between 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 first photosensitive device group and the light-transmitting area on the first light-shielding layer and the second light-shielding layer have at least partial overlap in their orthographic projections on the display substrate, and the second photosensitive device group and the light-shielding area on the first light-shielding layer and the second light-shielding layer have at least partial overlap in their orthographic projections on the display substrate.

[0017] Exemplarily, a plurality of first light-transmitting areas are provided in the first light-shielding layer, and a plurality of second light-transmitting areas are provided in the second light-shielding layer, and 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; wherein, one of the light-transmitting units is provided corresponding to one photosensitive device in the first photosensitive device group, and the filter layer is provided in at least one of the first light-transmitting area and the second light-transmitting area.

[0018] Exemplarily, in a second direction pointing from the display area to the peripheral area, and a first direction perpendicular to the second direction, the centers of the first light-transmitting area, the second light-transmitting area and the corresponding photosensitive device coincide with each other, 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.

[0019] Exemplarily, a dimension of any side of the orthographic projection of the second light-transmitting area on the display substrate relative to the orthographic projection of the effective light-sensing area of the photosensitive device on the display substrate is greater than or equal to 0.361 mm.

[0020] Exemplarily, the first light-transmitting area is configured to transmit white light, and a first filter layer is provided in the first light-transmitting area.

[0021] Exemplarily, 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 color ink layer provided in the hollow opening.

[0022] Exemplarily, several of the photosensitive devices are arranged in sequence along a first direction, and several of the second light-transmitting areas are arranged in correspondence with the several photosensitive devices. 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.

[0023] Exemplarily, 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 an arc chamfer, and the chamfer radius of the arc chamfer is greater than or equal to 0.2 mm.

[0024] Exemplarily, the shading area in the second shading layer at least partially overlaps with the orthographic projection of the first filter layer on the display substrate, and at at least one side edge of the second light-transmitting area, the overlapping area of the shading area of the first filter layer and the second shading layer has a dimension greater than or equal to 0.3 mm along a direction parallel to the display substrate.

[0025] Exemplarily, in a second direction from the display area to the peripheral area, a distance between the display area and the first filter layer is greater than or equal to 0.273 mm.

[0026] Exemplarily, several of the photosensitive devices are arranged in sequence along a first direction, and several of the second light-transmitting areas are arranged correspondingly to the photosensitive devices. 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 the two adjacent photosensitive devices and the other along the first direction on the display substrate is greater than or equal to 0.361 mm.

[0027] Exemplarily, the plurality of photosensitive devices are arranged in sequence and spaced apart along a first direction, where the first direction is an extension direction of the first side of the display substrate; wherein a distance between two adjacent photosensitive devices in the first direction is greater than or equal to 1.022 mm.

[0028] Exemplarily, a second filter layer is provided in the first light-transmitting area, and the second light-transmitting area is configured to transmit white light.

[0029] Exemplarily, 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 by a first predetermined distance relative to the display area 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 by a second predetermined distance relative to the display area toward the periphery of the display substrate.

[0030] Exemplarily, the first predetermined distance is 0.05 to 0.3 mm, and the second predetermined distance is 0.05 to 0.3 mm. Exemplarily, the second visible area has a first boundary line that intersects with the second non-visible area, and 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, and the distance between the first boundary line and the first edge along the second direction is greater than or equal to 0.404 mm.

[0031] The beneficial effects brought about by the embodiments of the present disclosure are as follows:

[0032] In the display device provided by the embodiment of the present disclosure, a plurality of photosensitive devices are arranged in the display substrate, which can be used to sense the intensity of ambient light and adjust the display brightness of the display substrate to achieve the purpose of saving energy consumption. Specifically, 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 photosensitive devices on the display substrate.

[0033] The above scheme includes the following technical solutions:

[0034] In one technical solution, when the orthographic projections of both the first light-shielding layer and the second light-shielding layer 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 arranged in the first non-visible area in a direction perpendicular to the display substrate. In this way, there is no need to reserve space for the photosensitive element between the display area and the first non-visible area, and the distance between the display area and the first non-visible area can be small, which can meet the requirements of a wide viewing angle test. In addition, the at least one photosensitive device can be shielded from external ambient light by the first light-shielding layer and the second light-shielding layer on a side close to the light-emitting side of the display substrate. The shielding effect is good, and the at least one photosensitive device can be unaffected by the external ambient light. The photosensitive device can more accurately detect the correction value affected by parameters such as temperature, and correct the detection value of other photosensitive devices that detect external ambient light, thereby improving the detection accuracy of ambient light.

[0035] 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 photosensitive device on the display substrate, the first light-shielding layer can block external ambient light from irradiating the at least one photosensitive device, so that the at least one photosensitive device is not affected by the external ambient light. In this way, the photosensitive device can more accurately detect a correction value affected by parameters such as temperature, and correct the detection values of other photosensitive devices used to detect external ambient light, thereby improving the accuracy of ambient light detection. In addition, at least one photosensitive device can block backlight light through the third light-shielding layer to prevent the backlight light from affecting the at least one photosensitive device, thereby improving the accuracy of ambient light detection.

[0036] In another technical solution, when the orthographic projections of both 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 element on the display substrate, the at least one photosensitive element is disposed in the first non-visible area in a direction perpendicular to the display substrate. Thus, no space for the photosensitive element need be reserved between the display area and the first non-visible area, and the distance between the display area and the first non-visible area can be reduced, thereby meeting wide viewing angle testing requirements. Furthermore, the first light-shielding layer and the second light-shielding layer can block ambient light from reaching the at least one photosensitive element, thereby preventing the at least one photosensitive element from being affected by ambient light. Consequently, the photosensitive element can more accurately detect a correction value affected by parameters such as temperature, thereby correcting the detection values of other photosensitive elements used to detect ambient light, thereby improving the accuracy of ambient light detection. Furthermore, the at least one photosensitive element can block backlight light through the third light-shielding layer to prevent the backlight from affecting the at least one photosensitive element, thereby improving the accuracy of ambient light detection.

[0037] 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 element on the display substrate, the at least one photosensitive element is disposed in the first non-visible area in a direction perpendicular to the display substrate. Thus, no space for the photosensitive element need be reserved between the display area and the first non-visible area, and the distance between the display area and the first non-visible area can be reduced, thereby meeting wide viewing angle testing requirements. Furthermore, the first and second light-shielding layers can block ambient light from reaching the at least one photosensitive element, thereby unaffecting the at least one photosensitive element. Consequently, the photosensitive element can more accurately detect a correction value affected by parameters such as temperature, thereby correcting the detection values of other photosensitive elements used to detect ambient light, thereby improving the accuracy of ambient light detection. Furthermore, the at least one photosensitive element can be shielded from backlight by the third light-shielding layer to prevent the backlight from affecting the at least one photosensitive element, thereby improving the accuracy of ambient light detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0038] Figure 1 A front view showing a display device in some embodiments of the present disclosure;

[0039] Figure 2 express Figure 1 Cross-sectional view along the E-E' direction;

[0040] Figure 3 express Figure 1 Cross-sectional view along the F-F' direction;

[0041] Figure 4 express Figure 1 A partial enlarged view of the middle Q;

[0042] Figure 5 One of the schematic diagrams showing the arrangement of the first filter layer in some embodiments of the present disclosure;

[0043] Figure 6 One of the light schematic diagrams showing a display device in some embodiments of the present disclosure;

[0044] Figure 7 A second schematic diagram showing light rays of a display device in some embodiments of the present disclosure;

[0045] Figure 8 A third schematic diagram showing light rays of a display device in some embodiments of the present disclosure;

[0046] Figure 9 A second schematic diagram showing the arrangement of the first filter layer in some embodiments of the present disclosure;

[0047] Figure 10 A curve showing the corresponding relationship between the drain current of the black light sensing device and the ambient light intensity in the control example;

[0048] Figure 11 A curve showing the corresponding relationship between the drain current of the black light sensing device and the ambient light intensity in the test example;

[0049] Figure 12 A curve showing the corresponding relationship between the drain current of the green light sensing device and the ambient light intensity in the control example;

[0050] Figure 13 A curve showing the corresponding relationship between the drain current of the green light sensor and the ambient light intensity in the test example. DETAILED DESCRIPTION

[0051] To make the purpose, technical solutions, and advantages of the embodiments of the present disclosure more clear, the technical solutions of the embodiments of the present disclosure will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present disclosure. Obviously, the described embodiments are part of the embodiments of the present disclosure, not all of the embodiments. Based on the described embodiments of the present disclosure, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present disclosure.

[0052] Unless otherwise defined, the technical or scientific terms used in this disclosure should have the usual meanings understood by people with ordinary skills in the field to which this disclosure belongs. The words "first", "second" and similar words used in this disclosure do not indicate any order, quantity or importance, but are only used to distinguish different components. Similarly, words such as "one", "an" or "the" do not indicate a quantity limitation, but rather indicate the existence of at least one. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0053] As used in the embodiments of the present disclosure, the terms "parallel," "perpendicular," and "identical" include the strict sense of "parallel," "perpendicular," and "identical," as well as "approximately parallel," "approximately perpendicular," and "approximately identical" with respect to a certain tolerance, which, taking into account the tolerances associated with the measurement of a particular quantity (e.g., limitations of the measurement system), means within an acceptable range of deviation for a particular value as determined by one of ordinary skill in the art. For example, "approximately" can mean within one or more standard deviations, or within 3% or 5% of the stated value.

[0054] In addition, in this document, unless otherwise defined, the terms "substantially," "essentially," "approximately," and "about" are used to describe and explain small variations. When used in connection with an event or circumstance, these terms can encompass situations where the event or circumstance occurs exactly, as well as situations where the event or circumstance occurs approximately. For example, when used in connection with a numerical value, these terms can include a range of variation of less than or equal to 10% of the numerical value, 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%, less than or equal to ±0.05%. The term "substantially coplanar" can refer to two surfaces being aligned along the same plane within the micrometer range, for example, within 40 μm, 30 μm, 20 μm, 10 μm, or 1 μm.

[0055] It should be understood that in the exemplary embodiments of the present disclosure, when a layer or element is referred to as being on another layer or substrate, the layer or element may be directly on the other layer or substrate, or an intervening layer may exist between the layer or element and the other layer or substrate. "A and B are disposed on the same layer" means that A and B are formed using the same film-forming process to form a film layer for forming a specific pattern, and then the layer structure is formed using the same mask through a single patterning process.

[0056] With the continuous advancement of display technology, the requirements for display screens are becoming increasingly stringent. Light sensors are called photometric sensors or light sensors. These sensors can be installed in display screens to sense the intensity of ambient light and adjust screen brightness to a level acceptable to the human eye, thereby achieving energy savings. However, in related technologies, light sensors in display screens suffer from low ambient light detection accuracy.

[0057] After research, the applicant of this disclosure found that one of the reasons for the above problems is:

[0058] In related technologies, photosensitive devices can be implemented using silicon-based photosensitive devices or thin-film transistors (TFTs). Silicon-based photosensitive devices are relatively expensive, while thin-film transistors can save costs. Hereinafter, thin-film transistors will be referred to as photosensitive TFTs.

[0059] The sensing principle of a light-sensitive TFT is that when the gate is unpowered and a certain voltage is applied to the source, a certain drain current is generated at the drain. By measuring the drain current at the drain electrode D, the intensity of the ambient light can be reflected. However, the drain current value detected by the light-sensitive TFT is affected not only by the intensity of the ambient light but also by the ambient temperature. Therefore, it is necessary to eliminate the influence of the ambient temperature factor on the light-sensitive TFT detection results.

[0060] In related art, a display panel is equipped with multiple light-sensitive TFTs. Some of these TFTs are used to receive ambient light to detect ambient light intensity. This group of light-sensitive TFTs is referred to as the first light-sensing device group. Another group of light-sensitive TFTs is configured not to receive ambient light and is used to detect changes in ambient temperature, resulting in changes in drain current. This group of light-sensitive TFTs is referred to as the second light-sensing device group.

[0061] 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 the ambient temperature factor on the test results of the first photosensitive device group can be eliminated to a certain extent, so that the test results of the first photosensitive device group are only affected by the intensity of the external ambient light, so as to accurately test the intensity of the external ambient light.

[0062] A display device generally includes a display substrate, a protective cover plate located on the light-emitting side of the display substrate, and a backlight module located on the non-light-emitting side of the display substrate. The display substrate includes a display area (Active Area, AA) and a non-display area surrounding the display area; the protective cover plate includes a first view area (VA) and a first non-view area; and the backlight module includes a second view area (VA) and a second non-view area.

[0063] Generally speaking, the first visible area of the protective cover, the second visible area of the backlight module and the display area of the display substrate at least partially overlap 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 at least partially overlap in the direction perpendicular to the display substrate, and the first visible area and the second visible area expand 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.

[0064] In order to achieve the following design requirements for the photosensitive TFT in the display substrate: try not to increase the border width of the display device; at the same time, ensure that the non-visible area on the protective cover does not block the photosensitive TFT, so that the photosensitive TFT can receive external ambient light; and try not to change the existing structure of the backlight module to avoid affecting the structure of the backlight module. For example, if the distance between the second visible area and the second non-visible area of the backlight module is changed, it may cause the risk of bright line debonding. The photosensitive TFT is generally set between the display area of the display substrate and the first non-visible area of the protective cover. In this way, the first non-visible area of the protective cover can be prevented from blocking the external ambient light from entering the first photosensitive device group. For the second photosensitive device group, the black matrix and other light-shielding layers in the display substrate can be used to block the external ambient light.

[0065] However, the present invention has found through research that the above structural design has the following technical problems:

[0066] First, although the second photosensitive device group is shielded by a black matrix or other light-shielding layer on the light-emitting side of the display substrate, it cannot completely block out ambient light. As a result, the drain current value detected by the second photosensitive device group is also affected by the ambient light intensity. In other words, the second photosensitive device group is also affected by both the ambient light intensity and the ambient temperature. The drain current value measured by the second photosensitive device group, which serves as a reference value for correcting the influence of ambient temperature, will contain errors, resulting in a reduction in the accuracy of the ambient light intensity measured by the first photosensitive device group.

[0067] Second, 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 arranged between the display area boundary of the display substrate and the second visible area boundary of the backlight module, resulting in the light of the backlight module also partially irradiating the photosensitive TFT, thereby causing the drain current generated by the photosensitive TFT to change not only due to the influence of the external ambient light, but also due to the light intensity of the backlight light source, thereby reducing the accuracy of the tested external ambient light.

[0068] Third, to prevent the first non-visible area on the protective cover from blocking the photosensitive TFTs, the first and second photosensitive device groups are both 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, the first and second photosensitive device groups are both located between the boundaries of the display area and the first visible area. This requires sufficient distance between the display area and the boundary of the first visible area to provide space for the photosensitive TFTs. If this distance is too large, the light leakage angle at wide viewing angles will increase.

[0069] Taking an actual product as an example, in a display device without a photosensitive TFT, the design value of the distance between the display area and the boundary of the first visible area of the protective cover can be about 0.2mm. If a photosensitive TFT is to be set between the display area and the first visible area of the protective cover, the distance needs to be increased by at least 0.13mm. 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 ±0.1mm (the unilateral tolerance is ±0.05), the fitting accuracy of the protective cover is ±0.1mm, and the tolerance between the ink window and the first visible area of the protective cover is ±0.1mm. 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 set between the display area and the first visible area of the protective cover, the distance needs to be increased by at least 0.13mm.

[0070] Therefore, compared to display devices without photosensitive TFTs, display devices with photosensitive TFTs require a design distance of 0.37mm between the display area boundary of the display substrate and the first visible area boundary 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 light leakage angle decreases by 36° from a maximum light leakage angle of >90° (no light leakage at wide viewing angles) to a minimum light leakage angle of 54°, increasing the risk of light leakage.

[0071] Moreover, although the distance between the boundary of the display area of the display substrate and the boundary of the first visible area of the protective cover is increased, there is still the problem of FOV (Field of View) test obstruction. For example, when the light is greater than a certain angle (for example, 30° to 40°), the first non-visible area on the protective cover blocks the light, and the light directly irradiated on the photosensitive TFT will be insufficient, resulting in a sudden decrease in the illumination received by the photosensitive TFT. That is, the FOV test does not meet the customer's specification requirement of a test angle of 50°, and the curve of the corresponding relationship between the test angle and the illumination is not a smooth transition. In addition, the distance between the boundary of the first visible area on the protective cover and the display area of the display substrate becomes larger, which will also affect the appearance and visual effects of the entire machine.

[0072] Based on this, in order to solve at least one of the problems in the above-mentioned related technologies, an embodiment of the present disclosure provides a display device.

[0073] like Figures 1 to 3 As shown, the display module provided by the embodiment of the present disclosure includes a display substrate 100 , a protection cover 200 and a backlight module 300 .

[0074] The display substrate 100 includes a display area AA and a peripheral area NA located outside the display area AA. The display area AA is the area of the display substrate 100 used for displaying images. The display area AA can be rectangular or rounded. A rounded rectangle means that the four corners of the rectangle are rounded.

[0075] 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 is the side of the display substrate 100 that can display images. The non-light-emitting side 100B of the display substrate 100 is the side opposite to the light-emitting side 100A.

[0076] 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 made of a light shielding material and located on the side of the display substrate 100 facing the light emitting side 100A of the light sensing devices 120.

[0077] For example, the display substrate 100 may be a liquid crystal display substrate, which may include an array substrate 101 and a color filter substrate 102 arranged in a cell. The color filter substrate 102 may include a color filter layer 104, which includes a plurality of filter units 141 for filtering light of different colors, and a black matrix layer 142 located around the filter units 141. The black matrix layer 142 defines a plurality of light-transmitting openings, in which the filter units 141 are located. The first light-shielding layer 110 may include, but is not limited to, the black matrix layer 142.

[0078] See Figure 2 and Figure 3 As shown, in some embodiments, the photosensitive device 120 can be provided on the array substrate 101, and the black matrix layer 142 can 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 to this.

[0079] By disposing a plurality of light sensing devices 120 in the display substrate 100 , the light sensing devices 120 can be used to sense the intensity of ambient light to adjust the display brightness of the display substrate 100 , thereby achieving the purpose of saving energy consumption.

[0080] The protective cover 200 is located on the light-emitting side 100A of the display substrate 100. The protective cover 200 is a transparent material (such as glass or plastic) covering the light-emitting side 100A of the display substrate 100. Its main function is to protect the display substrate 100 from physical damage, scratches, or dirt.

[0081] The protective cover 200 may have a first visible area VA1 and a first non-visible area NVA1.

[0082] The visible area refers to the area of the screen visible to the user when using the display device, unobstructed by the edges of the protective cover 200 or other structures. The first visible area VA1 of the protective cover 200 is the area beneath the protective cover 200 where the user can actually see the displayed content. This area is typically designed to maximize the display effect. The border or edge design of the protective cover 200 may affect the size of the first visible area VA1.

[0083] The first non-visible area NVA1 of the protective cover 200 is located outside the first visible area VA1. In other words, the first non-visible area NVA1 is the edge of the protective cover 200 and serves to block light. Therefore, a second light-blocking layer 210 is provided on the first non-visible area NVA1. For example, the second light-blocking layer 210 may include, but is not limited to, an ink layer 211 coated on the protective cover 200.

[0084] The backlight module 300 is disposed on the non-light-exiting side 100B of the display substrate 100 , and is used to provide a backlight source for the display substrate 100 .

[0085] The backlight module 300 includes a second visible area VA2 and a second non-visible area NVA2 located outside the second visible area VA2. In other words, the second non-visible area NVA2 is the edge of the backlight module 300. The second non-visible area NVA2 blocks backlight rays from radiating toward the display substrate 100. A third light-shielding layer 310 may be provided in the second non-visible area NVA2 to achieve this light-shielding effect. For example, the third light-shielding layer 310 may include, but is not limited to, a light-shielding adhesive 311 disposed within the backlight module 300.

[0086] The orthographic projections of the first and second visible areas VA1 and VA2 and the display area AA on the display substrate 100 at least partially overlap, and the orthographic projections of the first and second non-visible areas NVA1 and NVA2 and the peripheral area NA on the display substrate 100 at least partially overlap.

[0087] The orthographic projection areas of the first and second viewing areas VA1 and VA2 on the display substrate 100 are larger than the area of the display area AA. In other words, the first and second viewing areas VA1 and VA2 expand outward relative to the display area AA. In a direction from the display area AA toward the peripheral area NA, a first predetermined distance D1 is maintained between the boundary of the first viewing area VA1 and the boundary of the display area AA, and a second predetermined distance D2 is maintained between the boundary of the second viewing area VA2 and the boundary of the display area AA.

[0088] The orthographic projections of at least two 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. Specifically, there are at least four parallel implementations as follows:

[0089] In the first embodiment, the first light shielding layer 110, the second light shielding layer 210, and the orthographic projection of the at least one photosensitive device 120 on the display substrate 100 at least partially overlap. That is, in a direction perpendicular to the display substrate 100, the orthographic projection area of the at least one photosensitive device 120 includes the first light shielding layer 110 and the second light shielding layer 210.

[0090] When the orthographic projections of both 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 a direction perpendicular to the display substrate 100. Compared to the related art practice of disposing all photosensitive devices 120 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 between the display area AA and the first non-visible area NVA1 for arranging at least one photosensitive element. Therefore, the requirements for the adaptability of the distance between the display area AA and the first non-visible area NVA1 are reduced.

[0091] In particular, when all the photosensitive 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.

[0092] Hereinafter, the distance between the display area AA and the first non-visible area NVA1 is referred to as the first predetermined distance D1. For example, the first predetermined distance D1 can be reduced to the design dimension of the display module without the light sensor 120. For example, the first predetermined distance D1 can be as low as 0.2 mm. This can meet the wide viewing angle test requirements and reduce the risk of light leakage.

[0093] Moreover, when the orthographic projections of both 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, the at least one photosensitive device 120 can be shielded from external ambient light by the first light-shielding layer 110 and the second light-shielding layer 210.

[0094] In particular, when the photosensitive device 120 used to test the influence of ambient temperature is moved outward to the bottom of the corresponding area 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 above (i.e., the side close to the light-emitting side 100A), but also shielded by the second light-shielding layer 210 at the edge of the protective cover 200. The setting of the two light-shielding layers ensures the light-shielding effect, which can prevent the photosensitive device 120 from being affected by external ambient light, so that the photosensitive device 120 is only affected by ambient temperature. Therefore, the correction reference value affected by ambient temperature can be detected more accurately, so as to correct the test results of other photosensitive devices 120 used to test the intensity of external ambient light, thereby improving the accuracy of ambient light testing.

[0095] In a second embodiment, the first light-shielding layer 110 and the third light-shielding layer 310 partially overlap with the orthographic projection of the at least one photosensitive device 120 on the display substrate 100. That is, in a direction perpendicular to the display substrate 100, the orthographic projection area of the at least one photosensitive device 120 includes 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 external ambient light from reaching the at least one photosensitive device 120, thereby enabling the at least one photosensitive device 120 to detect a correction reference value affected by ambient temperature, which can be used to calibrate the test results of other photosensitive devices 120 that test the intensity of external ambient light.

[0096] At the same time, on the side of at least one photosensitive device 120 close to the non-light-emitting side 100B, the photosensitive device 120 is arranged in the second non-visible area NVA2 domain of the backlight module 300, and the third light-shielding layer 310 can be used to block the light from the backlight light source from irradiating the photosensitive device 120, thereby avoiding the backlight light from affecting the test results of the at least one photosensitive device 120, thereby improving the accuracy of the ambient light test.

[0097] In a third embodiment, the second light-shielding layer 210 and the third light-shielding layer 310 partially overlap with the orthographic projection of the at least one photosensitive device 120 on the display substrate 100. That is, in a direction perpendicular to the display substrate 100, the second light-shielding layer 210 and the third light-shielding layer 310 are located within the orthographic projection of the at least one photosensitive device 120. In this case, the at least one photosensitive device 120 is positioned in the first non-visible area NVA1. Compared to the related art practice of positioning all photosensitive devices 120 between the first non-visible area NVA1 and the display area AA, this is equivalent to moving the at least one photosensitive device 120 outward to the first non-visible area NVA1. This eliminates the need to reserve space between the display area AA and the first non-visible area NVA1 for at least one photosensitive element. Consequently, the required distance between the display area AA and the first non-visible area NVA1 can be adjusted more flexibly.

[0098] In particular, when all photosensitive TFTs are relocated outside to the area corresponding to the first non-visible area NVA1, the first predetermined distance D1 between the display area AA and the first non-visible area NVA1 can be reduced. For example, the first predetermined distance D1 can be reduced to the design dimension of a display module without photosensitive device 120. For example, the first predetermined distance D1 can be as low as 0.2 mm. This meets the requirements for wide viewing angle testing and reduces the risk of light leakage.

[0099] In addition, the second light-shielding layer 210 on the protective cover 200 can be used to block external ambient light from irradiating at least one photosensitive device 120, so that the at least one photosensitive device 120 can detect a correction reference value affected by the ambient temperature, which can be used to correct the test results of other photosensitive devices 120 that test the intensity of the external ambient light.

[0100] At the same time, on the side of at least one photosensitive device 120 close to the non-light-emitting side 100B, the photosensitive device 120 is arranged in the second non-visible area NVA2 of the backlight module 300, so as to utilize the third light-shielding layer 310 to block the light of the backlight light source, thereby avoiding the backlight light source from affecting the at least one photosensitive device 120, thereby improving the accuracy of the ambient light test.

[0101] In a fourth embodiment of the present 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 a 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.

[0102] 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 arranged in the first non-visible area NVA1 in a direction perpendicular to the display substrate 100. Compared with the related art in which all photosensitive devices 120 are arranged 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 arranging at least one photosensitive element between the display area AA and the first non-visible area NVA1. Therefore, the requirements for the adaptability of the distance between the display area AA and the first non-visible area NVA1 are reduced.

[0103] In particular, when all photosensitive TFTs are relocated to the area corresponding to the first non-visible area NVA1, the first predetermined distance D1 between the display area AA and the first non-visible area NVA1 can be reduced. Hereinafter, the distance between the display area AA and the first non-visible area NVA1 is referred to as the first predetermined distance D1. For example, the first predetermined distance D1 can be reduced to the design dimension of a display module without the photosensitive device 120. For example, the first predetermined distance D1 can be 0.2 mm. This meets the requirements for wide viewing angle testing and reduces the risk of light leakage.

[0104] Moreover, when the orthographic projections of both 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, the at least one photosensitive device 120 can be shielded from external ambient light by the first light-shielding layer 110 and the second light-shielding layer 210.

[0105] In particular, when the photosensitive device 120 used to test the influence of ambient temperature is moved outward to the corresponding area of the first non-visible area NVA1, above the photosensitive device 120 (i.e., the side close to the light-emitting side 100A), not only is there a first light-shielding layer 110 inside the display substrate 100 to block light, but there is also a second light-shielding layer 210 at the edge of the protective cover 200 to block light. The setting of the two light-shielding layers ensures the light-shielding effect, which can prevent the photosensitive device 120 from being affected by external ambient light, so that the photosensitive device 120 is only 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 intensity of external ambient light, thereby improving the accuracy of ambient light testing.

[0106] At the same time, on the side of at least one photosensitive device 120 close to the non-light-emitting side 100B, the photosensitive device 120 is arranged in the second non-visible area NVA2 domain of the backlight module 300, so as to use the third light-shielding layer 310 to block the light of the backlight light source, thereby avoiding the backlight light source from affecting the at least one photosensitive device 120, thereby improving the accuracy of the ambient light test.

[0107] It can be seen from the above content that the display device provided by the present disclosure can solve at least one technical problem in the related art.

[0108] As an exemplary embodiment, Figure 2 and Figure 3 As shown, the first light shielding layer 110 and the second light shielding layer 210 partially overlap with the orthographic projection of the 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 external ambient light from reaching the at least one photosensitive device 120. In this way, using two light shielding layers to block external ambient light from reaching the at least one photosensitive device 120 has a better light shielding effect than providing only one light shielding layer above the photosensitive device 120 (on the side close to the light-emitting side 100A).

[0109] As an exemplary embodiment, Figure 1 As shown, the plurality of light sensing devices 120 may include a first light sensing device group 120A for receiving external ambient light, and a second light sensing device group 120B for not receiving external ambient light.

[0110] The first photosensitive device group 120A and the second photosensitive device group 120B each include at least one photosensitive device 120. The first photosensitive device group 120A mainly functions to measure the intensity of the external ambient light, while the second photosensitive device group 120B mainly functions to measure the calibration reference value affected by the ambient temperature factor.

[0111] A light-transmitting region S1 and a light-shielding region S2 are provided on at least one of the first light-shielding layer 110 and the second light-shielding layer 210. A filter layer S3 is provided in the light-transmitting region S1, and the filter 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 region 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 filter layer S3 in the light-transmitting region S1 and illuminate the photosensitive devices 120 of the first photosensitive device group 120A, while the second photosensitive device group 120B is shielded from ambient light by the light-shielding region S2.

[0112] For example, taking the first light-shielding layer 110 including the black matrix layer 142 as an example, when several groups of photosensitive devices 120 are located below the black matrix layer 142, the positions of the photosensitive devices 120 in the first photosensitive device group 120A corresponding to the black matrix layer 142 can be hollowed out to form a light-transmitting area S1, and the filter layer S3 can be filled in the hollowed-out position, while the positions of the photosensitive devices 120 in the second photosensitive device group 120B on the black matrix layer 142 are not hollowed out to block the external ambient light from irradiating the photosensitive devices 120 in the second photosensitive device group 120B.

[0113] Similarly, taking the second light-shielding layer 210 including the ink layer 211 as an example, when several groups of photosensitive devices 120 are located below the ink layer 211, the positions of the photosensitive devices 120 in the first photosensitive device group 120A corresponding to the ink layer 211 can be hollowed out to form a light-transmitting area S1, and the filter layer S3 can be filled in the hollowed-out position, while the positions of the photosensitive devices 120 in the second photosensitive device group 120B corresponding to the ink layer 211 are not hollowed out to block the external ambient light from irradiating the photosensitive devices 120 of the second photosensitive device group 120B.

[0114] As an exemplary embodiment, Figure 2 and Figure 3 As shown, the first light sensing device group 120A may include a first light sensing device 121, a second light sensing device 122 and a third light sensing device 123, and the first light sensing device 121, the second light sensing device 122 and the third light sensing device 123 are used to respectively detect different colors of light in the external ambient light.

[0115] The filter layer S3 is configured to transmit light of the corresponding color corresponding to the light sensing devices 120 detecting different colors of light. For example, the first light sensing device 121 is used to detect red light in the external ambient light, the second light sensing device 122 is used to detect green light in the external ambient light, and the third light sensing device 123 is used to detect blue light in the external ambient light.

[0116] The photosensitive device 120 may include but is not limited to a thin film transistor, and the semiconductor material in the thin film transistor may include but is not limited to a-Si (amorphous silicon), LTPS (low temperature polycrystalline silicon), oxide (oxide semiconductor), etc.

[0117] For ease of description, the first photosensitive device 121 is hereinafter referred to as a red photosensitive device, the second photosensitive device 122 is referred to as a green photosensitive device, and the third photosensitive device 123 is referred to as a blue photosensitive device. The photosensitive device 120 in the second photosensitive device group 120B is referred to as a black photosensitive device. Accordingly, 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.

[0118] In the embodiment of the present disclosure, the principle of the light sensing function of the plurality of light sensing devices 120 is as follows:

[0119] When external ambient light shines on the first photosensitive device group 120A, the proportions of the three primary colors of blue light, green light, and red light are different. The external ambient light passes through the filter layer S3 and shines on the red light photosensitive device, the green light photosensitive device, and the blue light photosensitive device. The red light photosensitive device receives the red light in the external ambient light. Similarly, the green light photosensitive device receives the green light in the external ambient light, and the blue light photosensitive device receives the blue light in the external ambient light.

[0120] When a thin-film transistor is used as the photosensitive device 120, the thin-film transistor includes a gate, a source, and a drain. When the photosensitive device 120 is in the off state, no power is applied to the gate. When a certain voltage is applied to the source of any photosensitive device 120 in the off state, a certain drain current is generated at the drain. Thus, by measuring the drain current, the intensity of the ambient light can be measured.

[0121] Before performing an ambient light intensity test, the relationship between the test ambient light intensity and the drain current can be obtained in advance. However, in actual use, there are many types of ambient light, and the proportions of the three primary colors in different types of ambient light are different, which will be different from the proportions of the three primary colors in the test ambient light. Therefore, the actual ambient light needs to be corrected to the test ambient light. The specific correction algorithm can be as follows:

[0122] In advance, under a certain test environment light, corresponding drain current values under different light intensities are collected to generate a corresponding relationship between the light intensity of the test environment light at different intensities and the drain current magnitude.

[0123] The drain current values of the red light sensor and the blue light sensor under different types of test ambient light and different light intensities are collected in advance, so as to judge the color temperature of the external ambient light (i.e. the type of ambient light).

[0124] The drain current values of the green light sensor under different test ambient light types and different light intensities are collected in advance. Based on the different test ambient light types obtained in the above test and the test ambient light used in the previously obtained light intensity and drain current relationship curve, the light intensity correction coefficients for different ambient light types can be obtained.

[0125] By using the light intensity correction coefficient, the test results under the actual external ambient light can be corrected based on the light intensity and drain current relationship curve under the ambient light to be tested, so as to achieve the purpose of light intensity detection of the actual external ambient light.

[0126] The relationship between the test ambient light intensity and the drain current is determined at a fixed ambient temperature. However, the drain current of the light sensor 120 is affected not only by the ambient light intensity but also by the ambient temperature. By using a black light sensor, the effect of ambient temperature on the test results can be eliminated.

[0127] 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 ambient temperature. In other words, the leakage current value detected by the black photosensitive device can be used as a reference value to correct for the influence of ambient temperature factors.

[0128] The drain current values detected by the red light photosensor, the blue light photosensor, and the green light photosensor minus the correction reference value provided by the black light photosensor can be used as the test results of the red light photosensor, the blue light photosensor, and the green light photosensor. This ensures that the test results of the red light photosensor, the blue light photosensor, and the green light photosensor are only affected by the intensity of the external ambient light, so as to accurately detect the intensity of the external ambient light.

[0129] As an implementation method, Figure 2 and Figure 3As shown, 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 between the peripheral area NA and the first non-visible area NVA1, and the first light-shielding layer 110 and the second light-shielding layer 210 are both provided with a light-transmitting area S1 and a light-shielding area S2, wherein 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 overlapped; and 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 partially overlapped.

[0130] That is, both the first photosensitive device group 120A and the second photosensitive device group 120B may be disposed outside the display area AA and in an area corresponding to the first non-visible area NVA1 of the protective cover 200 .

[0131] With the above arrangement, no photosensitive device 120 may be arranged between the boundary of the display area AA and the boundary of the first non-visible area NVA1, and the first predetermined distance D1 between the boundary of the display area AA and the boundary of the first non-visible area NVA1 may be smaller, thereby meeting the wide viewing angle test requirements and reducing the risk of light leakage.

[0132] In some embodiments, when all the photosensitive devices 120 are arranged at corresponding positions of the first non-visible area NVA1, holes may be dug at corresponding positions in the second light-shielding layer 210 for the photosensitive devices 120 in the first photosensitive device group 120A, so that external ambient light can be irradiated onto the first photosensitive device group 120A; and at the positions corresponding to each photosensitive device 120 in the second photosensitive device group 120B, no holes are dug in the second light-shielding layer 210 to block external ambient light from irradiating the second photosensitive device group 120B.

[0133] It should be understood that in the above solution, placing all light sensors 120 in the first non-visible area NVA1 is merely an example. In other embodiments not shown, only a portion of the light sensors 120 may be placed in the first non-visible area NVA1. For example, only the light sensors 120 in the second light sensor group 120B may be placed 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 block ambient light from the light sensors 120 in the second light sensor group 120B, thereby improving detection accuracy.

[0134] Furthermore, when the photosensitive devices 120 in the first photosensitive device group 120A are disposed in the first non-visible area NVA1 , filter layers S3 of corresponding colors need to be provided for the red, green, and blue photosensitive devices in the first photosensitive device group 120A.

[0135] The filter layer S3 may be disposed in the first light shielding layer 110 or the second light shielding layer 210. Figure 2 As shown, a plurality of first light-transmitting areas S11 are provided in the first light-shielding layer 110, and a plurality of second light-transmitting areas S12 are provided in the second light-shielding layer 210. The first light-transmitting areas S11 and the second light-transmitting areas S12 can be formed by drilling holes in the corresponding light-shielding layers.

[0136] 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. A light-transmitting unit S0 is provided corresponding to one photosensitive device 120 in the first photosensitive device group 120A.

[0137] In one embodiment, a filter layer S3 is provided in both the first light-transmitting area S11 and the second light-transmitting area S12.

[0138] 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.

[0139] In another embodiment, the filter layer S3 may be provided only in the first light-transmitting area S11. That is, the 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.

[0140] For example, the filter layer S3 is provided only in the second light-transmitting area S12. Figure 2 As shown, the second light shielding layer 210 can be an ink layer 211. A second light-transmitting area S12 is provided on the second light shielding layer 210. The second light-transmitting area S12 is a hollow opening. The first filter layer S30 can include a color ink layer provided in the second light-transmitting area S12.

[0141] For example, the second light-shielding layer 210 may include a black ink layer. The black ink layer may be applied to the protective cover 200 by silk-screen printing or other methods, and hollow openings may be formed in the ink layer 211 corresponding to the locations of the red, green, and blue light sensors. The first filter layer S30 may be a colored ink layer applied to the second light-transmitting region S12. The colored ink layers may include a red ink layer S31, a green ink layer S32, and a blue ink layer S33.

[0142] As an example embodiment, Figure 4As shown, in the second direction Y pointing from the display area AA to the peripheral area NA, and the first direction X perpendicular to the second direction Y, the centers of the first light-transmitting area S11, the second light-transmitting area S12 and the effective light-sensitive area of the corresponding photosensitive device 120 coincide with each other, and the orthographic projection areas of the second light-transmitting area S12 and the first light-transmitting area S11 on the display substrate 100 are both larger than the orthographic projection area of the effective light-sensitive 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.

[0143] That is, the centers of the first light-transmitting area S11, the second light-transmitting area S12, and the effective light-sensing area of the corresponding photosensitive device 120 coincide with each other, which is beneficial for calculating the positional relationship between each film layer and the photosensitive device 120. However, this is not limited thereto.

[0144] The second light-transmitting area S12 serves as the light incident area of the light-sensing device 120 . The area of the second light-transmitting area S12 needs to meet the FOV test requirements.

[0145] In some embodiments, as Figure 4 As shown, the dimension a of any side of the orthographic projection of the second light-transmitting area S12 on the display substrate 100 relative to the orthographic projection of the effective light-sensing area of the photosensitive device 120 on the display substrate 100 may be greater than or equal to 0.361 mm.

[0146] Hereinafter, the dimension of any side of the orthographic projection of the second light-transmitting area S12 on the display substrate 100 extending outward relative to the orthographic projection of the effective light-sensing area of the photosensitive device 120 on the display substrate 100 is referred to as a first extending dimension a.

[0147] The specific calculation method of the first outer expansion size a can be as follows:

[0148] Assume that the FOV test viewing angle requirements are: the minimum FOV viewing angle standard is ±30°, and the maximum FOV viewing angle standard is ±50°. In order to meet the FOV wide viewing angle requirement of 50°, the first outer expansion dimension a must be satisfied. When the FOV wide viewing angle θ1 = 50°, the black ink layer cannot block the light sensing device 120.

[0149] Therefore, the first outer expansion dimension a must satisfy the following formula:

[0150] a=T1*tanθ2+△1; wherein T1 is the distance between the surface of the protective cover 200 facing the light-emitting side 100A and the photosensitive device 120 in a direction perpendicular to the display substrate 100, △1 is the assembly tolerance of the protective cover 200, and when θ1=50°, θ2=30.7°.

[0151] by Figure 6Taking the example shown, 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.

[0152] In some embodiments, T1 may be equal to 0.386 mm, and thus the first outer dimension a may be greater than or equal to 0.361 mm. In other words, any side of the red ink layer S31, green ink layer S32, and blue ink layer S33 printed on the protective cover 200 extends beyond the corresponding photosensitive device 120 by at least 0.361 mm.

[0153] It should be understood that the above is only an explanation of the calculation method of the first outward expansion dimension a for a specific example. The specific value of the first outward expansion dimension a is not limited to this. The value range of the first outward expansion dimension a can be greater than or equal to 0.361 mm, and is calculated based on the film layer thickness in actual application.

[0154] Furthermore, in some embodiments, Figure 1 As shown, the plurality of photosensitive devices 120 are sequentially spaced apart along a first direction X, where the first direction X is the direction in which the first side of the display substrate 100 extends. For example, the display substrate 100 may include a bonding side DA and an opposite bonding side DB opposite to the bonding side DA. The plurality of photosensitive devices 120 may be disposed on the opposite bonding side DB and sequentially spaced apart along the direction in which the opposite bonding side DB extends. However, this is not limiting.

[0155] Correspondingly, the plurality of second light-transmitting regions S12 and the plurality of photosensitive devices 120 are spaced apart from each other.

[0156] like Figure 4 and Figure 5 As shown, still 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 200, the size of the second light-transmitting area S12 can be configured as follows:

[0157] A dimension b of the first light-transmitting area S11 along the first direction X is greater than or equal to 0.3 mm;

[0158] The distance c between two adjacent second light-transmitting areas S12 in the first direction X is 0.3-0.5 mm. In this way, ink is not easily accumulated during screen printing, and the size requirement is met.

[0159] 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 an arc chamfer, and the chamfer radius R of the arc chamfer is greater than or equal to 0.2 mm.

[0160] In addition, considering the length of a single photosensitive device 120 along the first direction X and the outer extension of the first light-transmitting area S11 relative to the photosensitive device 120 in the first direction X, the length of the first filter layer S30 in the first direction X should satisfy the following relationship:

[0161] d=x+2*a; wherein x is the length of a single photosensitive device 120 along the first direction X, and a is the outer extension dimension of the first light-transmitting area S11 relative to the photosensitive device 120 in the first direction X.

[0162] In addition, considering the ink screen printing process, the shading area S2 in the second shading layer 210 (i.e., the coating area of the black ink layer) and the orthographic projection of the first filter layer S30 (i.e., the coating area of the color ink layer) on the display substrate 100 at least partially overlap.

[0163] In an exemplary embodiment, at at least one side edge of the second light-transmitting area S12 , a dimension e of an overlapping region between the first filter layer S30 and the light-shielding area S2 of the second light-shielding layer 210 along a direction parallel to the display substrate 100 is greater than or equal to 0.3 mm.

[0164] Taking the example of using black ink for the first light-shielding layer 110 and color ink for the first filter layer S30, a black ink layer can be first screen-printed on the protective cover 200, and then color ink layers of different colors can be screen-printed separately. Therefore, there will be some overlap between the black ink layer and the color ink layer. In order to meet the requirements of the screen printing process, the overlapping dimension e of the black ink layer and the color ink layer is at least 0.3 mm.

[0165] Furthermore, in some embodiments, Figure 4 and Figure 8 As shown, in the second direction Y from the display area AA to the peripheral area NA, the third predetermined distance f between the display area AA and the first filter layer S30 may be greater than or equal to 0.273 mm. However, the present invention is not limited thereto.

[0166] Furthermore, in some embodiments, Figure 8 As shown, a plurality of photosensitive devices 120 are sequentially spaced apart along a first direction X, and a plurality of second light-transmitting regions S12 are spaced apart correspondingly to the plurality of photosensitive devices 120 . The first direction X is an extension direction of the first side of the display substrate 100 .

[0167] The distance g between the first filter layer S30 corresponding to one of the two adjacent photosensitive devices 120 and the other along the first direction X on the display substrate 100 is greater than or equal to 0.361. This ensures that ambient light only strikes one photosensitive device 120 in the first photosensitive device group 120A and does not strike other photosensitive devices 120.

[0168] Specifically, taking the red light sensor as an example, to ensure that when the external ambient light illuminates the red light sensor, it does not interfere with other surrounding light sensors 120, under the requirement of FOV θ1 = 50°, the minimum distance between the red ink layer S31 and another adjacent light sensor 120 needs to satisfy the following relationship:

[0169] g min = T1*tanθ2+Δ1; where T1 is the distance between the surface of the protective cover 200 facing the light-emitting side 100A and the light-sensing device 120 in the direction perpendicular to the display substrate 100, and ΔT is the assembly tolerance of the protective cover 200. In some embodiments, when T1 is equal to 0.386 mm, g min =0.361, the refraction angle of the external ambient light after entering the protective cover 200 is θ2, when θ1=50°, θ2=30.7°.

[0170] Taking the spacing c between the color filter layers S3 as 0.4±0.1 mm 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 along the first direction X on the display substrate 100 is c and g. min The sum, g, is equal to 0.761 mm.

[0171] In addition, several photosensitive devices 120 are arranged in sequence along the first direction X. Even if there is no gap between the red ink layer S31, the green ink layer S32 and the blue ink layer S33, the design requirement that any side edge 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.

[0172] Considering that the overlap size of the color ink layer and the second light shielding layer 210 is at least 0.3 mm, in some embodiments, such as Figure 9 As shown, the distance h between two adjacent light sensing devices 120 in the first direction X is greater than or equal to 1.022 mm. It should be understood that the above is only an example and is not limited to this in other embodiments.

[0173] In a specific embodiment, taking the case where only the second light-transmitting area S12 is provided with the filter layer S3, see Figure 4 and Figure 5As shown, x=980μm, y=17μm, i=5μm, j=0.9~1.1mm, 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, and the second direction Y is perpendicular to the first direction X; i is the outward expansion dimension of the first light-transmitting area S11 relative to the photosensitive device 120 in the first direction X (the second outward expansion dimension), and j is the frame dimension of the display substrate 100.

[0174] The dimensions of the filter layer S3 are: c = 0.4 ± 0.1 mm, a = 0.361 mm, and m = 0.273 mm. Here, c is the spacing between two adjacent first filter layers S30 along the first direction X, a is the first outward extension 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 edge of the display area AA to the first filter layer S30 along the second direction Y. Using this solution, the bezel dimension j of the display device can be between 0.9 and 1.1 mm, without increasing the bezel size compared to a display module without the photosensitive device 120.

[0175] It should be understood that the above is merely an exemplary description of the positional relationship and size values of the film layers in the display device, and is not intended to be limiting.

[0176] Furthermore, in some embodiments of the present disclosure, when the first filter layer S30 is a colored ink layer, the higher the ink transmittance, the better. For example, the transmittance of each color ink layer can be greater than 30% within its respective wavelength range. This can be determined based on actual sample testing.

[0177] Furthermore, in some embodiments, taking the example of a first photosensitive device group 120A and a second photosensitive device group 120B both being located in the first non-visible area NVA1 of the protective cover 200, the orthographic projections of the display area AA and the first visual area VA1 on the display substrate 100 at least partially overlap, and in a direction parallel to the display substrate 100, the first visual area VA1 is offset relative to the display area AA by a first predetermined distance D1 toward the periphery of the display substrate 100. The first predetermined distance D1 is the distance between the boundary of the first visual area VA1 and the boundary of the display area AA. Exemplarily, the first predetermined distance D1 may be 0.05 to 0.3 mm. For example, the first predetermined distance D1 may be 0.2 mm.

[0178] By moving each photosensitive device 120 outward to the first non-visible area NVA1 of the protective cover 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 wide viewing angle requirement and reduce the risk of light leakage.

[0179] In some embodiments, taking the example of a case where both the first photosensitive device group 120A and the second photosensitive device group 120B are disposed in the second non-visible area NVA2 of the backlight module 300, the orthographic projections of the display area AA and the second visual area VA2 on the display substrate 100 at least partially overlap, and in a direction parallel to the display substrate 100, the second visual area VA2 is offset relative to the display area AA by a second predetermined distance D2 toward the periphery of the display substrate 100. Exemplarily, the second predetermined distance D2 may be 0.05 to 0.3 m, for example, 0.23 mm.

[0180] By moving each photosensitive device 120 outward to the second non-visible area NVA2 of the protective cover 200, the second visible area VA2 can be reduced in offset by a second predetermined distance D2 relative to the display area AA toward the periphery of the display substrate 100, so that the backlight light can be blocked 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.

[0181] In addition, if Figure 6 As shown, the second visible area VA2 has a first boundary line VA21 that intersects 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 proximate to the display area AA along the second direction Y extending 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 a third predetermined distance D3.

[0182] In order to minimize the impact of backlight on the light sensor 120, the third predetermined distance D3 needs to be limited. For example, the value range of the third predetermined distance D3 can be greater than or equal to 0.404 mm.

[0183] Specifically, generally speaking, the light divergence angle of the backlight module 300 is within 45 degrees. The brightness of the backlight light exceeding 45 degrees is very small and can be blocked by the metal light shielding layer on the display substrate 100. Therefore, the design should mainly avoid that the light with a divergence angle of 45 degrees does not directly hit the light sensor 120. Figure 6 In the light diagram shown, the third predetermined distance D3 needs to satisfy the following relationship:

[0184] D3=T2 / tanα+△2; wherein T2 is the distance between the light sensor 120 and the backlight module 300 in the direction perpendicular to the display substrate 100, △2 is the assembly tolerance of the backlight module 300, and α is the divergence angle of the backlight light, for example 45°.

[0185] In some embodiments, when T2 = 0.237 mm, D3 = 0.404 mm, but this is not limiting.

[0186] In some embodiments, Figure 6 As shown in the example, a lower polarizer layer 600 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 on the array substrate 101 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 a direction perpendicular to the display substrate 100. However, this is not limiting.

[0187] Ambient light of any large viewing angle on the display side of the display device needs to be blocked by the first non-visible area NVA1 on the protective cover 200 to avoid being irradiated onto the light sensing device 120 .

[0188] In some embodiments, as Figure 7 As shown, the first predetermined distance D1 can be 0.23 mm, the second predetermined distance D2 can be greater than or equal to 0.404 mm, and the first outward expansion dimension a can be 0.2 mm, then D4=0.23+0.404-0.2=0.434 mm, 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.

[0189] Taking the above dimensions as an example, verify whether the ambient light entering from the first visual area VA1 will illuminate the light sensing device 120. Figure 7 As shown, assuming the angle of illumination of ambient light is β1, and the angle of refraction of ambient light after entering the protective cover 200 is β2, taking D4 equal to 0.404 mm as an example, β2 = arctan(0.434 / 0.386) = 48.35°, sinβ1 = 1.5*sinβ2, and β1 > 90°. In other words, ambient light entering from the first visible area VA1 will not illuminate the light sensor 120.

[0190] A display device in which each photosensitive device 120 is disposed in the first non-visible area NVA1 is used as a test example, and a display device in which each photosensitive device 120 is disposed between the display area AA and the first non-visible area NVA1 is used as a control example.

[0191] The leakage current of the black light sensing device in the test example and the control example was tested, and the corresponding relationship data between the drain current of the black light sensing device and the ambient light intensity were obtained as shown in Table 1 and Table 2. The corresponding relationship curve is shown in Figure 10 and Figure 11 As shown in Table 1 and Figure 10 The test results of the test case are shown in Table 2 and Figure 11 Shown are the test results of the control example. Figure 10 and Figure 11 In the figure, the horizontal axis represents the external light intensity, and the vertical axis represents the drain current value of the black light sensing device.

[0192] Table 1

[0193]

[0194] Table 2

[0195]

[0196] From Table 1 and Table 2, and Figure 10 and Figure 11 It can be seen that, compared with the control example, the black light sensing device in the display device provided by the embodiment of the present disclosure can be affected only by the ambient temperature, but not by the ambient light intensity.

[0197] Take the same backlight module 300, test the leakage current of the green light sensor in the test example and the control example, and obtain the corresponding relationship data between the drain current of the green light sensor and the backlight brightness as shown in Table 3 and Table 4. The corresponding relationship curve is shown in Figure 12 and Figure 13 As shown in Table 3 and Figure 12 The test results of the control example are shown in Table 4 and Figure 13 Shown are the test results of the test case. Figure 12 and Figure 13 In the figure, the horizontal axis represents the backlight brightness, and the vertical axis represents the drain current value of the green light sensing device.

[0198] Table 3

[0199]

[0200] Table 4

[0201]

[0202] From Table 3 and Table 4, Figure 12 and Figure 13 It can be seen that, compared with the control example, in the display device provided by the embodiment of the present disclosure, the drain current detected by the green light photosensor is not affected by the backlight brightness.

[0203] Furthermore, it should be noted that the display devices provided by the embodiments of the present disclosure include, but are not limited to, devices with display functions, such as smartphones, monitors, laptop computers, tablet computers, electronic photo frames, driving recorders, and smart wearable devices. Other essential components of the display device (such as the driver chip) are well understood by those skilled in the art and are not detailed here, nor should they be construed as limitations of the present disclosure.

[0204] There are a few points to note:

[0205] (1) The drawings of the embodiments of the present disclosure only relate to the structures related to the embodiments of the present disclosure. Other structures may refer to conventional designs.

[0206] (2) For the sake of clarity, the thickness of layers or regions in the drawings used to describe the embodiments of the present disclosure are exaggerated or reduced, i.e., these drawings are not drawn to scale. It is understood that when an element such as a layer, film, region, or substrate is referred to as being "on" or "under" another element, the element may be "directly" "on" or "under" the other element or intervening elements may be present.

[0207] (3) In the absence of conflict, the embodiments of the present disclosure and the features therein may be combined with each other to form new embodiments.

[0208] The above are only specific embodiments of the present disclosure, but the protection scope of the present disclosure is not limited thereto. The protection scope of the present disclosure should be based on the protection scope of the claims.

Claims

1. A display device, characterized in that: include: A display substrate having a display area and a peripheral area located outside the display area, wherein a first light shielding layer and a plurality of light sensing devices are provided in the display substrate; a protective cover plate, disposed on the light-emitting side of the display substrate, and comprising a first visible area and a first non-visible area located outside the first visible area, wherein a second light-shielding layer is disposed on the first non-visible area; and A backlight module is provided 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 outside the second visible area, and a third light-shielding layer is provided in the second non-visible area for blocking the backlight from being emitted toward the display substrate; 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.

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

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

4. The display device according to claim 1, wherein The third light-shielding layer includes light-shielding glue arranged in the backlight module.

5. The display device according to claim 1, wherein The first light-shielding layer and the second light-shielding layer partially overlap with the orthographic projection of at least one photosensitive device on the display substrate, and the first light-shielding layer and the second light-shielding layer are used to block external ambient light from irradiating at least one photosensitive device.

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

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

8. The display device according to claim 6, wherein: In a direction perpendicular to the display substrate, the first photosensitive device group and the second photosensitive device group are both located in the overlapping area between 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 first photosensitive device group and the light-transmitting area on the first light-shielding layer and the second light-shielding layer are at least partially overlapped in their orthographic projections on the display substrate, and the second photosensitive device group and the light-shielding area on the first light-shielding layer and the second light-shielding layer are at least partially overlapped in their orthographic projections on the display substrate.

9. The display device according to claim 6, wherein: A plurality of first light-transmitting areas are provided in the first light-shielding layer, and a plurality of second light-transmitting areas are provided in the second light-shielding layer. 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; wherein, one of the light-transmitting units is provided corresponding to one of the photosensitive devices in the first photosensitive 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, wherein In a second direction from the display area to the peripheral area, and in a first direction perpendicular to the second direction, the centers of the first light-transmitting area, the second light-transmitting area, and the corresponding effective light-sensitive area of the photosensitive device coincide with each other, 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 light-sensitive 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, wherein: The dimension of any side of the orthographic projection of the second light-transmitting area on the display substrate relative to the orthographic projection of the effective light-sensing 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, wherein The first light-transmitting area is configured to transmit white light, and a first filter layer is provided in the second light-transmitting area.

13. The display device according to claim 12, wherein: When the second light-shielding layer is an ink layer, the second light-shielding layer is provided with the second light-transmitting area, the second light-transmitting area is a hollow opening, and the first filter layer includes a color ink layer provided in the hollow opening.

14. The display device according to claim 13, wherein: Several of the photosensitive devices are arranged in sequence along a first direction, and several of the second light-transmitting areas are arranged in correspondence with the several photosensitive devices. 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.

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

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

17. The display device according to claim 13, wherein: In a second direction from the display area to the peripheral area, a 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, wherein: Several of the photosensitive devices are arranged in sequence along a first direction, and several of the second light-transmitting areas are arranged correspondingly to the photosensitive devices. 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 the two adjacent photosensitive devices and the effective light-sensitive 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, wherein: The plurality of photosensitive devices are sequentially spaced apart along a first direction, where the first direction is an extension direction of the first side of the display substrate; wherein a 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, wherein 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, wherein 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 by a first predetermined distance relative to the display area 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 by a second predetermined distance relative to the display area toward the periphery of the display substrate.

22. The display device according to claim 21, wherein 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, wherein 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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