Display module and display device

Abstract

The invention provides a display module and a display device. The display module comprises a display panel, a photosensitive assembly and a cover plate covering the display panel. The photosensitive component comprises a plurality of first photosensitive elements, a plurality of first filter layers, a second photosensitive element and a second filter layer. The first light filtering layers are configured to penetrate any one of three kinds of primary light in ambient light, different first light filtering layers penetrate different kinds of primary light, and the first light sensing elements are configured to collect the primary light penetrating through the corresponding first light filtering layers and generate first sensing signals. The second filter layer is configured to transmit the inter-color light with the central wavelength between the central wavelengths of the two adjacent primary colors in the ambient light, and the second photosensitive element is configured to collect the inter-color light transmitted by the second filter layer and generate a second sensing signal.

Description

Technical Field

[0001] The present disclosure relates to the field of display technologies, and particularly to a display module and a display device. Background Art

[0002] With the development of display technologies, it is possible to integrate photosensitive elements on a display panel to detect the light source type of ambient light, so as to adjust the brightness of the screen according to the light source type, thereby reducing the power consumption of the display product and improving the comfort of the user when viewing the screen. Summary of the Invention

[0003] Some embodiments of the present disclosure provide a display module and a display device, which are beneficial to improving the accuracy of identifying the light source of ambient light.

[0004] In a first aspect, some embodiments of the present disclosure provide a display module, including a display panel, a photosensitive component, and a cover plate covering the display panel. The display panel includes a display area and a peripheral area surrounding the display area. The photosensitive component includes a plurality of first photosensitive elements, a second photosensitive element, a plurality of first filter layers corresponding to the plurality of first photosensitive elements, and a second filter layer corresponding to the second photosensitive element. The plurality of first photosensitive elements and the second photosensitive element are disposed in the peripheral area of the display panel. The first filter layer is disposed on the side of the first photosensitive element close to the cover plate. The first filter layer is configured to transmit any one of the three primary color lights in ambient light, and different first filter layers transmit different primary color lights. The first photosensitive element is configured to collect the primary color light transmitted by the corresponding first filter layer and generate a first induction signal. The second filter layer is disposed on the side of the second photosensitive element close to the cover plate. The second filter layer is configured to transmit an intermediate color light whose central wavelength in ambient light is between the central wavelengths of two adjacent primary color lights. The second photosensitive element is configured to collect the intermediate color light transmitted by the second filter layer and generate a second induction signal.

[0005] In some embodiments, the first filter layer is disposed in the peripheral area of the display panel or on the bottom surface of the cover plate. The second filter layer is disposed in the peripheral area of the display panel or on the bottom surface of the cover plate. The bottom surface of the cover plate is the surface of the cover plate close to the display panel.

[0006] In some embodiments, the display panel includes an array substrate, a liquid crystal layer, and a color filter substrate. The plurality of first photosensitive elements and the second photosensitive element are disposed on the array substrate. The color filter substrate includes a substrate and a light-shielding layer and a color filter layer disposed on a side of the substrate close to the array substrate. The light-shielding layer is provided with a color filter opening, a first photosensitive opening corresponding to the first photosensitive element, and a second photosensitive opening corresponding to the second photosensitive element. The color filter layer is disposed at the color filter opening, and the first filter layer is disposed at the first photosensitive opening. A positive projection of the second photosensitive opening on the array substrate is located within a positive projection of the second filter layer on the array substrate. A positive projection of the first photosensitive opening on the array substrate is located within a positive projection of the first filter layer on the array substrate.

[0007] In some embodiments, the second filter layer is disposed on a surface of the color filter substrate away from the array substrate.

[0008] In some embodiments, when the second filter layer is disposed on a surface of the color filter substrate away from the array substrate, or when the second filter layer is disposed on a bottom surface of the cover plate, the second filter layer is a color ink layer.

[0009] In some embodiments, a positive projection of the first photosensitive opening on the array substrate is a first projection area, a positive projection of the first filter layer on the array substrate is a second projection area, a positive projection of the second photosensitive opening on the array substrate is a third projection area, and a positive projection of the second filter layer on the array substrate is a fourth projection area. When the second filter layer is disposed on a surface of the color filter substrate away from the array substrate, or when the second filter layer is disposed on a bottom surface of the cover plate, a distance between a boundary line of the fourth projection area and a boundary line of the third projection area is greater than a distance between a boundary line of the second projection area and a boundary line of the first projection area.

[0010] In some embodiments, when the second filter layer is disposed on a bottom surface of the cover plate, a distance between a boundary line of the fourth projection area and a boundary line of the third projection area is 0.244 to 0.361 millimeters.

[0011] In some embodiments, the second light filtering layer is disposed at the second photosensitive opening. The second light filtering layer includes a first sub-light filtering layer and a second sub-light filtering layer which are stacked. The light transmission bands of the first sub-light filtering layer and the second sub-light filtering layer overlap. One of the first sub-light filtering layer and the second sub-light filtering layer is configured to transmit red light, and the other is configured to transmit green light. Alternatively, one of the first sub-light filtering layer and the second sub-light filtering layer is configured to transmit green light, and the other is configured to transmit blue light.

[0012] In some embodiments, the first photosensitive element and the second photosensitive element each include M photosensitive transistors connected in parallel, where M is from 50 to 100. The channel shape of the photosensitive transistor is U-shaped.

[0013] In some embodiments, the cover plate includes a visible area and a non-visible area surrounding the visible area. A black ink layer is disposed on the bottom surface of the cover plate in the non-visible area. The orthographic projection of the display area on the bottom surface of the cover plate is located within the visible area. An avoidance groove is provided at an edge position of the black ink layer close to the photosensitive component. The opening of the avoidance groove faces the visible area and communicates with the visible area. The orthographic projection of the photosensitive component on the bottom surface of the cover plate is located between the orthographic projection of the avoidance groove on the bottom surface of the cover plate and the orthographic projection of the display area on the bottom surface of the cover plate.

[0014] In some embodiments, the above display module further includes an optical adhesive layer disposed between the cover plate and the display panel. Part of the optical adhesive layer is attached to the bottom surface of the cover plate, and part of the optical adhesive layer is attached to the black ink layer disposed in the non-visible area. The optical adhesive layer includes a main body portion and a compensation portion connected to the main body portion. The orthographic projection of the avoidance groove on the bottom surface of the cover plate is located within the orthographic projection of the main body portion on the bottom surface of the cover plate. The compensation portion is located on a side of the avoidance groove away from the visible area, and the compensation portion protrudes from the main body portion in a direction away from the opening of the avoidance groove.

[0015] In some embodiments, an imaging area is provided in the display area. The orthographic projection of the avoidance groove on the bottom surface of the cover plate is located between the orthographic projection of the imaging area on the bottom surface of the cover plate and the orthographic projection of the compensation portion on the bottom surface of the cover plate.

[0016] In some embodiments, the above display module further includes a polarizer disposed between the optical adhesive layer and the display panel. A first edge of the polarizer extends beyond the edge of the display panel. The first edge is the edge of the polarizer close to the compensation portion. The edge of the compensation portion away from the main body portion extends beyond the edge of the display panel. The distance by which the first edge of the polarizer extends beyond the edge of the display panel is greater than or equal to the distance by which the compensation portion extends beyond the edge of the display panel.

[0017] In some embodiments, the distance by which the edge of the compensation portion away from the main body portion extends beyond the edge of the display panel is 0.1 - 0.15 mm.

[0018] In some embodiments, the edge of the main body portion is flush with the edge of the display panel, or is recessed inward compared to the edge of the display panel.

[0019] In some embodiments, the peripheral region includes a first sub - peripheral region and a second sub - peripheral region connected to the first sub - peripheral region. The second sub - peripheral region protrudes toward the display region compared to the first sub - peripheral region and is surrounded by the display region. The first sub - peripheral region surrounds the region composed of the display region and the second sub - peripheral region. At least part of the photosensitive component is disposed in the second sub - peripheral region.

[0020] In some embodiments, the display panel includes an electrostatic ring disposed in the peripheral region. The electrostatic ring includes a first sub - electrostatic ring and a second sub - electrostatic ring electrically connected to the first sub - electrostatic ring. The second sub - electrostatic ring is located between the photosensitive component and the display region. The first sub - electrostatic ring is located in the first sub - peripheral region, and the second sub - electrostatic ring is located in the second sub - peripheral region.

[0021] In some embodiments, the cover plate includes a visible region and a non - visible region surrounding the visible region. A black ink layer is disposed on the bottom surface of the cover plate in the non - visible region. The orthographic projection of the display region on the bottom surface of the cover plate is located within the visible region. The plurality of first photosensitive elements and the second photosensitive element are located in the second sub - peripheral region, and the edge of the black ink layer close to the photosensitive component is a straight line in the orthographic projection on the bottom surface of the cover plate.

[0022] In a second aspect, some embodiments of the present disclosure provide a display device, including the display module provided in the first aspect of the present disclosure.

[0023] Based on the setting of a plurality of first photosensitive elements and a first filter layer corresponding to the plurality of first photosensitive elements, some embodiments of the display module provided by the present disclosure further provide a second photosensitive element and a second filter layer corresponding to the second photosensitive element. This enables the photosensitive component to detect not only multiple primary color lights in the ambient light but also the intermediate color light whose central wavelength is between the central wavelengths of two adjacent primary color lights in the ambient light, so as to identify the light source type of the ambient light by combining the detected multiple primary color light components and the detected intermediate color light components. Compared with simply using multiple primary color light components, it is beneficial to improve the accuracy of identifying the light source of the ambient light.

[0024] The above description is only an overview of the technical solutions provided by the embodiments of the present disclosure. In order to understand the technical means of the embodiments of the present disclosure more clearly, it can be implemented according to the content of the specification. And in order to make the above and other purposes, features and effects of the embodiments of the present disclosure more obvious and understandable, the following specifically presents the specific implementation manners of the embodiments of the present disclosure. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the technical solutions in the present disclosure, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the drawings in the following description are some embodiments of the present disclosure. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained according to these drawings.

[0026] Figure 1 A plan view of a display module showing some embodiments of the present disclosure;

[0027] Figure 2 Showing some embodiments of the present disclosure Figure 1 of the a-a cross-sectional view;

[0028] Figure 3 Showing an exemplary equivalent circuit diagram of the first photosensitive element or the second photosensitive element;

[0029] Figure 4A Showing a schematic structural diagram of a thin film transistor with a one-dimensional channel;

[0030] Figure 4B Showing a schematic structural diagram of a thin film transistor with a U-shaped channel;

[0031] Figure 5A and Figure 5B Showing the test results of a sample with a total channel width-to-length ratio of 1500 / 4;

[0032] Figure 5C and Figure 5D Showing the test results of a sample with a total channel width-to-length ratio of 3000 / 4;

[0033] Figure 6 Showing Figure 1 of the b-b cross-sectional view;

[0034] Figure 7 Showing Figure 2 an enlarged schematic view of the P region in;

[0035] Figure 8 Showing some other embodiments of the present disclosure Figure 1 of the a-a cross-sectional view;

[0036] Figure 9 Showing some other embodiments of the present disclosureFigure 1 Cross-sectional view taken along line a-a;

[0037] Figure 10 Shows an exemplary circuit architecture diagram;

[0038] Figure 11 Shows a partial plan view of the photosensitive side of a display module according to some embodiments of the present disclosure;

[0039] Figure 12 Shows Figure 11 Cross-sectional view taken along line c-c in;

[0040] Figure 13 Shows a schematic diagram of the optical path of ambient light incident on the photosensitive component;

[0041] Figure 14 Shows a schematic diagram of the structure of a display module according to some embodiments of the present disclosure;

[0042] Figure 15 Shows a partial plan view of the photosensitive side of a display module according to some other embodiments of the present disclosure;

[0043] Figure 16A Shows Figure 15 Cross-sectional view taken along line d-d in;

[0044] Figure 16B Shows Figure 15 Cross-sectional view taken along line e-e in;

[0045] Figure 17 Shows Figure 15 Partial plan view of the optical adhesive layer on the photosensitive side in;

[0046] Figure 18 Shows a partial plan view of a display panel according to some embodiments of the present disclosure;

[0047] Figure 19 Shows a plan view of the photosensitive side of a display module according to some further embodiments of the present disclosure;

[0048] Figure 20 Shows Figure 18 Schematic diagram of the structure of region U in;

[0049] Figure 21 Shows a schematic diagram of the structure of a display device according to some embodiments of the present disclosure. Detailed implementation manners

[0050] Exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although the exemplary embodiments of the present disclosure are shown in the drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments set forth herein. On the contrary, these embodiments are provided so that the present disclosure can be more thoroughly understood and the scope of the present disclosure can be completely conveyed to those skilled in the art.

[0051] It should be noted that the term "at least one" as used herein includes one or more than one, and "a plurality" includes two or more than two. The words such as "include" or "comprise" mean that the elements or objects appearing before the word cover the elements or objects listed after the word and their equivalents, without excluding other elements or objects. The terms such as "upper", "lower", "left", and "right" are only used to represent relative positional relationships, and when the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0052] As used herein, "about" includes the stated value and the average value within an acceptable deviation range of the specific value, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurement being discussed and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system).

[0053] As used herein, "parallel", "perpendicular", "equal", and "same" include the stated situations and situations similar to the stated situations, and the range of the similar situations is within an acceptable deviation range, where the acceptable deviation range is determined by those of ordinary skill in the art considering the measurement being discussed and the errors associated with the measurement of the specific quantity (i.e., the limitations of the measurement system). For example, "parallel" includes absolute parallelism and approximate parallelism, where the acceptable deviation range of approximate parallelism can be, for example, within 5° deviation; "perpendicular" includes absolute perpendicularity and approximate perpendicularity, where the acceptable deviation range of approximate perpendicularity can also be, for example, within 5° deviation. "Equal" and "same" include absolute equality and approximate equality, where the acceptable deviation range of approximate equality can be, for example, that the difference between the two equal ones is less than or equal to 5% of either one of them.

[0054] It should be understood that when a layer or element is said to be on another layer or substrate, it can be that the layer or element is directly on the other layer or substrate, or there may be an intermediate layer between the layer or element and the other layer or substrate.

[0055] As described in this article, "the orthographic projection of B is within the orthographic projection range of A" means that the boundary of the orthographic projection of B falls within the boundary of the orthographic projection of A, or the boundary of the orthographic projection of A overlaps with the boundary of the orthographic projection of B. In the formulas described in this article, "*" represents the multiplication sign, " / " represents the division sign, and "sqrt" represents taking the square root.

[0056] As described in this article, "A and B are arranged on the same layer" means that A and B are formed simultaneously through the same lithography process. For example, the forming process may include: first forming at least one film layer by the same film-forming process, and then performing the same lithography process on this at least one film layer to form a layer structure including a specific pattern. Depending on the different specific patterns, the lithography process may include multiple photoresist coating, exposure, development, or etching processes, and the specific patterns in the formed layer structure may be continuous or discontinuous, and these specific patterns may also be at different heights (or thicknesses).

[0057] Figure 1 A plan view of a display module according to some embodiments of the present disclosure is shown. Figure 2 As shown in some embodiments of the present disclosure Figure 1 is a cross-sectional view taken along line a-a. Refer to Figure 1 and Figure 2 For some embodiments of the present disclosure, the display module 10 includes a display panel 100, a photosensitive component 200, and a cover plate 600 covering the display panel 100. For example, the display panel 100 may be a liquid crystal display (LCD), an organic light-emitting diode (OLED) display panel, or a quantum dot light-emitting diode (QLED) display panel, etc.

[0058] As Figure 1 shown, the display panel 100 includes a display area AA and a peripheral area NA surrounding the display area AA. The photosensitive component 200 includes a plurality of first photosensitive elements 211, a plurality of first filter layers 221, a second photosensitive element 212, and a second filter layer 222. The above-mentioned plurality of first photosensitive elements 211 and the second photosensitive element 212 are disposed in the peripheral area NA of the display panel 100. The above-mentioned plurality of first filter layers 221 may be disposed in the peripheral area NA of the display panel 100, or may also be disposed on the bottom surface of the cover plate 600.

[0059] The second filter layer 222 may be disposed in the peripheral area NA of the display panel 100, or may also be disposed on the bottom surface of the cover plate 600. The bottom surface of the cover plate 600 is the surface closer to the display panel 100.

[0060] A plurality of first filter layers 221 are arranged corresponding to a plurality of first photosensitive elements 211. For example, they can be arranged in one-to-one correspondence. The first filter layer 221 is disposed on the side of the first photosensitive element 211 close to the cover plate 600. The first filter layer 221 is configured to transmit any one of the three primary color lights in the ambient light, and different first filter layers 221 transmit different primary color lights. The first photosensitive element 211 is configured to collect the primary color light transmitted by the corresponding first filter layer 221 and generate a first induction signal. For example, the above three primary color lights are red light, green light, and blue light respectively.

[0061] Figure 2 Taking the above-mentioned plurality of first photosensitive elements 211 as three first photosensitive elements 211, namely a red light photosensitive element 211R, a green light photosensitive element 211G, and a blue light photosensitive element 211B as an example for illustration. Correspondingly, the above-mentioned plurality of first filter layers 221 are three first filter layers 221, namely a red filter layer 221R, a green filter layer 221G, and a blue filter layer 221B. The red filter layer 221R is arranged corresponding to the red light photosensitive element 211R, the green filter layer 221G is arranged corresponding to the green light photosensitive element 211G, and the blue filter layer 221B is arranged corresponding to the blue light photosensitive element 211B. The red filter layer 221R is configured to transmit red light in the ambient light, and the red light photosensitive element 211R is configured to collect the red light transmitted by the red filter layer 221R. The green filter layer 221G is configured to transmit green light in the ambient light, and the green light photosensitive element 211G is configured to collect the green light transmitted by the green filter layer 221G. The blue filter layer 221B is configured to transmit blue light in the ambient light, and the blue light photosensitive element 211B is configured to collect the blue light transmitted by the blue filter layer 221B.

[0062] It should be noted that in other embodiments, the number of the above-mentioned plurality of first photosensitive elements 211 and the plurality of first filter layers 221 can also be two or greater than three. In the case of setting two first photosensitive elements 211 and two first filter layers 221, the two first filter layers 221 can be a red filter layer 221R and a green filter layer 221G respectively, or a green filter layer 221G and a blue filter layer 221B, or a red filter layer 221R and a blue filter layer 221B.

[0063] The second filter layer 222 is correspondingly disposed with the second photosensitive element 212. For example, the second photosensitive element 212 may be one or more, and each second photosensitive element 212 is correspondingly provided with a second filter layer 222. The second filter layer 222 is disposed on the side of the second photosensitive element 212 close to the cover plate 600. The second filter layer 222 is configured to transmit the intermediate color light in the ambient light whose central wavelength is between the central wavelengths of two adjacent primary color lights. The second photosensitive element 212 is configured to collect the intermediate color light transmitted by the second filter layer 222 and generate a second induction signal. "Two adjacent primary color lights" refers to two primary color lights with adjacent wavelengths among the three primary color lights, that is, there is no other primary color light of other colors between the two primary color lights. For example, when the three primary color lights include red light, blue light, and green light, the above two adjacent primary color lights may be red light and green light, and the intermediate color light transmitted by the second filter layer 222 may be yellow light with a central wavelength between the central wavelength of red light and the central wavelength of green light; or, the above two adjacent primary color lights may be green light and blue light, and the intermediate color light transmitted by the second filter layer 222 may be cyan light with a central wavelength between the central wavelength of green light and the central wavelength of blue light.

[0064] It should be noted that when there are multiple second photosensitive elements 212, the second filter layers 222 corresponding to different second photosensitive elements 212 may be configured to transmit intermediate color lights of different colors. Taking the case where two second photosensitive elements 212 are provided as an example, the second filter layer 222 corresponding to one of the second photosensitive elements 212 may transmit yellow light, and the second filter layer 222 corresponding to the other second photosensitive element 212 may transmit cyan light, that is, one second photosensitive element 212 collects the yellow light in the ambient light, and the other second photosensitive element 212 collects the cyan light in the ambient light.

[0065] It can be understood that in the spectra of different types of light sources, the proportions of light components of different colors are different. The first induction signal generated by each first photosensitive element 211 can characterize the primary color light component of the corresponding color in the ambient light, and the second induction signal generated by the second photosensitive element 212 can characterize the intermediate color light component of the corresponding color in the ambient light. Therefore, by further processing the first induction signal and the second induction signal, the light source type of the external ambient light can be identified. For example, the light source types of the external ambient light can include A light source (tungsten filament light, i.e., a light source that conforms to a color temperature of 2856K), D65 light source (artificial sunlight, i.e., a light source that conforms to a color temperature of 6500K), CWF light source (full English name: Cool White Fluorescent, cold white fluorescent light source, i.e., a light source that conforms to a color temperature of 4150K), TL84 light source (fluorescent light source, color temperature of 4000K), U30 light source (warm white fluorescent light source, color temperature of about 3000K), and LED light source (light emitting diode light source), etc. By detecting the first induction signal and the second induction signal, it can be detected which one of them the light source type of the external ambient light belongs to, and the color temperature of the light source can also be further determined.

[0066] For the display module provided by some embodiments of the present disclosure, on the basis of setting a plurality of first photosensitive elements 211 and a first filter layer 221 corresponding to the plurality of first photosensitive elements 211, a second photosensitive element and a second filter layer 222 corresponding to the second photosensitive element 212 are added, so that in addition to being able to detect a variety of primary color lights in the ambient light, the photosensitive component 200 can also detect the intermediate color light whose central wavelength is between the central wavelengths of two adjacent primary color lights in the ambient light, and combine the detected variety of primary color light components and the detected intermediate color light components to identify the light source type of the ambient light. Compared with simply using a variety of primary color light components, it is beneficial to improve the accuracy of identifying the light source of the ambient light.

[0067] In some embodiments, the wavelength range of the intermediate color light transmitted by the second filter layer 222 can be the intersection of the wavelength ranges of two of the three primary color lights. Taking the wavelength range of the intermediate color light as the intersection of the wavelength ranges of the red primary color light and the green primary color light as an example, when the wavelength range of the red primary color light transmitted by the red filter layer 221R is from 580nm to 800nm, and the wavelength range of the green primary color light transmitted by the green filter layer 221G is from 470nm to 640nm, the wavelength range of the intermediate color light can be from 580nm to 640nm.

[0068] It should be noted that in practical applications, the wavelength range of the red primary color light transmitted by the red light filtering material may overlap with the wavelength range of the green primary color light transmitted by the green light filtering material, and the wavelength range of the green primary color light transmitted by the green light filtering material may overlap with the wavelength range of the blue primary color light transmitted by the blue light filtering material. The wavelength range of the intermediate color light transmitted by the second light filtering layer 222 can be determined according to the light source type that is difficult to accurately identify by simply comparing the primary color light components in the ambient light in the actual application scenario. The present disclosure places no limitation on this.

[0069] For example, it is found through experiments that the ratio between the red light component and the blue light component of the D65 light source and the LED light source is relatively close. It is difficult to distinguish these two light sources by simply detecting the red light component in the ambient light through the above-mentioned red light photosensitive element 211R and detecting the blue light component in the ambient light through the above-mentioned blue light photosensitive element 211B. By analyzing the spectra of the D65 light source and the LED light source, it can be seen that the energy difference between the spectra of the D65 light source and the LED light source in the overlapping band of green light and blue light (such as 480 nm to 500 nm) is relatively large. Therefore, by setting the second light filtering layer 222 to be able to transmit the overlapping band of the green primary color light and the blue primary color light, the energy detection of this overlapping band in the ambient light can be realized, which is beneficial to more accurately identifying the D65 light source and the LED light source.

[0070] Figure 3 An exemplary equivalent circuit diagram of the first photosensitive element 211 or the second photosensitive element 212 is shown. As Figure 3 shown, the first photosensitive element 211 and the second photosensitive element 212 may each include M photosensitive transistors ST connected in parallel, where M is greater than or equal to 2, and the above-mentioned first induction signal and second induction signal are current signals. The photosensitive transistor ST includes a first pole, a second pole, and a control pole. For example, the first poles of the M photosensitive transistors ST included in the same photosensitive element may be electrically connected to the same input signal line K1, the second poles are electrically connected to the same output signal line K2, and the control poles are electrically connected to the same control signal line K3.

[0071] The photosensitive transistor ST may be a thin film transistor (TFT) or a metal oxide semiconductor (MOS) field effect transistor, such as a complementary metal oxide semiconductor (CMOS) field effect transistor with photosensitive function. The control pole of the photosensitive transistor ST may be a gate, and one of the first pole and the second pole is a source pole, and the other is a drain pole.

[0072] When the ambient light passing through the first light filtering layer 221 irradiates the photosensitive transistors ST included in the first photosensitive element 211, these photosensitive transistors ST generate currents, and a first induction signal is output from the output signal line K2 connected to the second pole. When the ambient light passing through the second light filtering layer 222 irradiates the photosensitive transistors ST included in the second photosensitive element 212, these photosensitive transistors ST generate currents, and a second induction signal is output from the output signal line K2 connected to the second pole. In some embodiments, the photosensitive transistors ST included in each photosensitive element (including the above-mentioned first photosensitive element 211 and second photosensitive element 212) may be the same transistors, for example, parameters such as the type, shape, and size of the transistors are the same. The strength of the induction signal generated by the photosensitive element is related to the number of photosensitive transistors ST included therein and the channel shape.

[0073] In some embodiments, the photosensitive transistor ST may be a thin film transistor (TFT) with a U-shaped channel.

[0074] Figure 4A The structural schematic diagram of a thin film transistor with a straight channel is shown. Figure 4B The structural schematic diagram of a thin film transistor with a U-shaped channel is shown. The length of the channel CR is denoted as L, and the width is denoted as W. The width-to-length ratio W / L of the channel CR of a single photosensitive transistor, and the total width-to-length ratio of the channel CR of M photosensitive transistors connected in parallel is (M*W) / L. For example, in the case of W / L being 20 / 4, if each photosensitive element includes 75 photosensitive transistors arranged in parallel, then the total width-to-length ratio of the channel CR of this photosensitive element is 1500 / 4. If each photosensitive element includes 150 photosensitive transistors arranged in parallel, then the total width-to-length ratio of the channel CR of this photosensitive element is 3000 / 4.

[0075] The inventor conducted a comparative experiment on the photocurrents of thin film transistors with straight channels and U-shaped channels, and prepared 9 samples. On samples 1-4, 75 straight thin film transistors (with a channel width-to-length ratio of 20 / 4 for all) arranged in a row and connected in parallel were fabricated respectively, serving as channels #1 to #4. On samples 5-9, 75 U-shaped thin film transistors (with a channel width-to-length ratio of 20 / 4 for all) arranged in a row and connected in parallel were fabricated respectively, serving as channels #5 to #9. Under the same illumination and driving conditions, the photocurrents generated by channels #1 to #9 are shown in Table 1. By comparing the average current AVG1 of channels #1 to #4 and the average current AVG2 of channels #1 to #9, it can be obtained that under the same driving conditions, the photocurrent corresponding to the U-shaped channel thin film transistor is about 2.5 times that of the straight channel corresponding photocurrent, and is more sensitive to light.

[0076] Table 1

[0077]

[0078]

[0079] It has been found through research that the number of photosensitive transistors included in the photosensitive element, that is, the total width-to-length ratio of the channels, is one of the factors affecting the recognition result of the light source type. Although the larger the number of photosensitive transistors and the greater the total width-to-length ratio of the channels, the larger the generated photocurrent, if the number of photosensitive transistors is too large and the total width-to-length ratio is too large, it will instead make it difficult to distinguish some light source types.

[0080] Taking a U-shaped thin-film transistor with W / L of 20 / 4 as an example, for the red-light photosensitive element 211R and the blue-light photosensitive element 211B containing 75 thin-film transistors (the total width-to-length ratio of the channels is 1500 / 4), and the red-light photosensitive element 211R and the blue-light photosensitive element 211B containing 150 thin-film transistors (the total width-to-length ratio of the channels is 3000 / 4), the ratio XR / XB between the detected red-light component and blue-light component under different light source irradiations was compared, and Figures 5A - 5D the obtained comparison result graph is shown. Figure 5A and Figure 5B shows the test results of the sample with a channel total width-to-length ratio of 1500 / 4, Figure 5C and Figure 5D shows the test results of the sample with a channel total width-to-length ratio of 3000 / 4.

[0081] Figure 5A and Figure 5C The abscissa of and is the sample number, and the ordinate is the average value of XR / XB detected under various different illuminances of the same light source. XR is the voltage value converted from the current signal generated by the red-light photosensitive element 211R under the irradiation of the red primary color light passing through the red filter layer 221R. XB is the voltage value converted from the current signal generated by the blue-light photosensitive element 211B under the irradiation of the blue primary color light passing through the blue filter layer 221B. Figure 5A and Figure 5C The six different-colored broken lines in and are the test curves corresponding to six different types of light sources. The light blue curve corresponds to the A light source, the red curve corresponds to the CWF light source, the gray curve corresponds to the D65 light source, the yellow curve corresponds to the LED light source, the dark blue curve corresponds to the TL84 light source, and the green curve corresponds to the U30 light source. Figure 5B and Figure 5D The abscissa of and is the sample number, and the ordinate is the difference between the average value of XR / XB detected under each light source and the average value of XR / XB detected under the reference light source. In Figure 5B and Figure 5D , the reference light source is the LED light source.

[0082] From Figures 5A - 5DIt can be seen that when the total channel width-to-length ratio is 3000 / 4, there are relatively many intersection points between the test curves of each light source, and errors are likely to occur in the light source type recognition results. When the total channel width-to-length ratio is 1500 / 4, there are relatively few intersection points between the test curves of each light source. That is to say, compared with the red light sensing element 211R and the blue light sensing element 211B with a total channel width-to-length ratio of 3000 / 4, the red light sensing element 211R and the blue light sensing element 211B with a total channel width-to-length ratio of 1500 / 4 have a higher discrimination degree for the light source type.

[0083] Therefore, in order to more accurately distinguish different light source types, in some embodiments, the total width-to-length ratio of the photosensitive transistors included in the first photosensitive element 211 and the total width-to-length ratio of the photosensitive transistors included in the second photosensitive element 212 can be 1000 / 4 to 2000 / 4. For example, it can be 1000 / 4, 1500 / 4 or 2000 / 4. Through experimental verification, a total width-to-length ratio within the above range is beneficial to distinguishing different types of light sources to improve the recognition accuracy of the light source type. For example, in the case where the photosensitive transistor is a U-shaped thin film transistor and W / L is 20 / 4, the number of photosensitive transistors included in each of the first photosensitive element 211 and the second photosensitive element 212 can be 50 to 100, that is, M is 50 to 100, and it can be 50, 75 or 100, for example.

[0084] The display panel 100 includes a data binding side (Data Pad, abbreviated as DP side) and a data binding opposite side (Data Pad Opposite, abbreviated as DPO side). For example, the data binding side and the data binding opposite side can be two sides opposite to each other in the second direction. In some embodiments, the first photosensitive element 211 and the second photosensitive element 212 can be disposed in the peripheral area NA of the data binding opposite side. For example, a plurality of the first photosensitive elements 211 and the second photosensitive elements 212 can be arranged in a row along the first direction. The first direction intersects the second direction, such as being perpendicular to each other. For example, the first direction can be the pixel row direction of the pixel array in the display panel 100 (such as Figure 1 the X-axis direction in Figure 1 ), and the second direction can be the pixel column direction of the pixel array (such as

[0085] When the first photosensitive element 211 and the second photosensitive element 212 each include a plurality of photosensitive transistors, these photosensitive transistors can also be arranged in a row along the first direction to further reduce the occupied width of the photosensitive component 200 on the border area of the display panel 100, which is beneficial to achieving a narrow border. For example, when the plurality of first photosensitive elements 211 include a red photosensitive element 211R, a green photosensitive element 211G, and a blue photosensitive element 211B, and the red photosensitive element 211R, the green photosensitive element 211G, the blue photosensitive element 211B, and the second photosensitive element 212 each include 75 photosensitive transistors, these 300 photosensitive transistors can be arranged in a row along the first direction.

[0086] Figure 6 shows Figure 1 the cross-sectional view taken along line b-b in Figure 6 Referring to

[0087] When the display panel 100 is an LCD display panel, the display panel 100 includes an array substrate 110, a liquid crystal layer 120, and a color filter substrate 130. The array substrate 110 and the color filter substrate 130 are disposed opposite to each other, and the liquid crystal layer 120 is located between the array substrate 110 and the color filter substrate 130. The array substrate 110 includes a substrate 111, thin film transistors (TFTs) 112 disposed on the substrate 111, pixel electrodes 114 of pixels, and other structures. The array substrate 110 can also be referred to as a TFT substrate. The color filter substrate 130 may include a substrate 131, a light-shielding layer 132 disposed on the side of the substrate 131 close to the array substrate 110, a color filter layer 133 (Color Filter, abbreviated as CF), and other structures. For example, the light-shielding layer 132 can be formed of a black light-shielding material and can also be referred to as a black matrix (abbreviated as BM). For example, the color filter layer 133 may include a red color filter layer 133R, a green color filter layer 133G, and a blue color filter layer 133B. The color filter substrate 130 can also be referred to as a CF substrate. The common electrode of the pixel can be disposed on the array substrate 110, or can also be disposed on the color filter substrate 130, which is set according to the needs of the actual product.

[0088] The above-mentioned multiple first photosensitive elements 211 and the above-mentioned second photosensitive elements 212 are disposed on the array substrate 110. When the display panel 100 is an amorphous silicon (a-Si) LCD display panel, the photosensitive transistors included in the first photosensitive elements 211 and the second photosensitive elements 212 may be disposed on the same layer as other transistors on the array substrate 110 (such as the driving transistors disposed in the display area AA). During actual fabrication, the photosensitive transistors constituting the above-mentioned multiple first photosensitive elements 211 and second photosensitive elements 212 may be formed simultaneously with the formation of other transistors on the array substrate 110.

[0089] As Figure 2 and Figure 6 shown, the light-shielding layer 132 is provided with a plurality of light-transmitting openings, namely a color filter opening 134, a first photosensitive opening 135 corresponding to the first photosensitive element 211, and a second photosensitive opening 136 corresponding to the second photosensitive element 212. Each first photosensitive element 211 is correspondingly provided with a photosensitive opening. The above-mentioned multiple first photosensitive elements 211 include a red photosensitive element 211R, a green photosensitive element 211G, and a blue photosensitive element 211B. The light-shielding layer 132 is respectively provided with a first photosensitive opening 135 corresponding to the red photosensitive element 211R, a first photosensitive opening 135 corresponding to the green photosensitive element 211G, and a first photosensitive opening 135 corresponding to the blue photosensitive element 211B.

[0090] The color filter layer 133 is disposed at the color filter opening 134. The orthographic projection of the color filter opening 134 on the array substrate 110 is within the orthographic projection range of the color filter layer 133 on the array substrate 110. For example, the color filter layer 133 may fill the color filter opening 134 and overlap with the light-shielding layer 132 around the color filter opening 134.

[0091] The orthographic projection of the second photosensitive opening 136 on the array substrate 110 is within the orthographic projection range of the second filter layer 222 on the array substrate 110, and the orthographic projection of the first photosensitive opening 135 on the array substrate 110 is within the orthographic projection range of the first filter layer 221 on the array substrate 110, so as to ensure that the incident ambient light can pass through the first filter layer 221 and the second filter layer 222 and then enter the first photosensitive element 211 and the second photosensitive element 212 respectively. For example, the above-mentioned "orthographic projection on the array substrate 110" may be the orthographic projection on the first substrate of the array substrate 110.

[0092] In some embodiments, the first filter layer 221 may be disposed at the first photosensitive opening 135. For example, the first filter layer 221 may extend beyond the boundary of the first photosensitive opening 135, or alternatively, it may not extend beyond the boundary and only fill the first photosensitive opening 135. In the case where the plurality of first filter layers 221 includes a red filter layer 221R, a green filter layer 221G, and a blue filter layer 221B, the red filter layer 221R may be disposed on the same layer as the red color film layer 133R, the green filter layer 221G may be disposed on the same layer as the green color film layer 133G, and the blue filter layer 221B may be disposed on the same layer as the blue color film layer 133B.

[0093] Figure 7 shows Figure 1 an enlarged schematic view of the P region in. Refer to Figure 7 In some embodiments, the second filter layer 222 may be disposed at the second photosensitive opening 136. The second filter layer 222 includes a first sub-filter layer 2221 and a second sub-filter layer 2222 that are stacked. There is an overlap between the light transmission bands of the first sub-filter layer 2221 and the second sub-filter layer 2222. For example, the light transmission band of the first sub-filter layer 2221 is λ1 to λ2, the light transmission band of the second sub-filter layer 2222 is λ3 to λ4, and there is an overlap between λ1 to λ2 and λ3 to λ4, that is, λ3 < λ1 < λ4 < λ2. The intermediate color light band transmitted by the second filter layer 222 may be λ1 to λ4.

[0094] In some embodiments, one of the first sub-filter layer 2221 and the second sub-filter layer 2222 is configured to transmit red light, and the other is configured to transmit green light. The intermediate color light transmitted by the second filter layer 222 is an intermediate color light between red light and green light, and the central wavelength of this intermediate color light is located between the central wavelength of red light and the central wavelength of green light. For example, the first sub-filter layer 2221 includes a red filter material, and the second sub-filter layer 2222 includes a green filter material.

[0095] In some other embodiments, one of the first sub-filter layer 2221 and the second sub-filter layer 2222 is configured to transmit green light, and the other is configured to transmit blue light. The intermediate color light transmitted by the second filter layer 222 is an intermediate color light between green light and blue light, and the central wavelength of this intermediate color light is located between the central wavelength of green light and the central wavelength of blue light. For example, the first sub-filter layer 2221 includes a green filter material, and the second sub-filter layer 2222 includes a blue filter material.

[0096] In some embodiments, the thickness of the first sub-filter layer 2221 may be less than the thickness of the first filter layer 221, and the thickness of the second sub-filter layer 2222 may be less than the thickness of the first filter layer 221. For example, the sum of the thicknesses of the first sub-filter layer 2221 and the second sub-filter layer 2222 may be approximately equal to the thickness of the first filter layer 221.

[0097] Figure 8 shows a cross-sectional view taken along line a-a in some other embodiments of the present disclosure Figure 1 of the cross-section taken along line a-a, Figure 9 shows a cross-sectional view taken along line a-a in still some other embodiments of the present disclosure Figure 1 of the cross-section taken along line a-a. Referring to Figure 8 , in still some other embodiments, the second light filtering layer 222 may be disposed on the bottom surface of the cover plate 600. Referring to Figure 9 , in some other embodiments, the second light filtering layer 222 may be disposed on the surface of the color filter substrate 130 on the side away from the array substrate 110. For example, the second light filtering layer 222 may be a color ink layer formed on the surface of the second substrate on the side away from the array substrate 110 or on the bottom surface of the cover plate 600 by a screen printing process. For example, the color ink layer may be configured to transmit yellow light with a central wavelength between the central wavelength of red light and the central wavelength of green light, and filter out light of other colors except yellow light; or, transmit cyan light with a central wavelength between the central wavelength of green light and the central wavelength of blue light, and filter out light of other colors except cyan light.

[0098] When the second light filtering layer 222 is disposed on the surface of the color filter substrate 130 on the side away from the array substrate 110, or when the second light filtering layer 222 is disposed on the bottom surface of the cover plate 600, the boundary of the second light filtering layer 222 extends beyond the boundary of the second photosensitive opening 136 to more comprehensively filter the ambient light incident within the viewing angle range of the display module 10.

[0099] The orthographic projection of the first photosensitive opening 135 on the array substrate 110 is a first projection area, the orthographic projection of the first light filtering layer 221 on the array substrate 110 is a second projection area, the orthographic projection of the second photosensitive opening 136 on the array substrate 110 is a third projection area, and the orthographic projection of the second light filtering layer 222 on the array substrate 110 is a fourth projection area. When the first light filtering layer 221 is disposed at the first photosensitive opening 135, the second light filtering layer 222 is disposed on the surface of the color filter substrate 130 on the side away from the array substrate 110, or when the second light filtering layer 222 is disposed on the bottom surface of the cover plate 600, the boundary line of the third projection area is located within the boundary line of the fourth projection area, and the distance between the boundary line of the fourth projection area and the boundary line of the third projection area is greater than the distance between the boundary line of the second projection area and the boundary line of the first projection area.

[0100] For example, the boundary line of the second projection area may generally coincide with the boundary line of the first projection area, and the entire boundary line of the fourth projection area extends outward by a certain distance compared to the boundary line of the third projection area. For another example, the distance by which the entire boundary line of the second projection area extends outward compared to the boundary line of the first projection area is the first distance, and the distance by which the entire boundary line of the fourth projection area extends outward compared to the boundary line of the third projection area is the second distance, and the second distance is greater than the first distance.

[0101] For example, when the second light filtering layer 222 is disposed on the bottom surface of the cover plate 600, the distance D1 by which the boundary of the second light filtering layer 222 extends beyond the boundary of the second photosensitive opening 136 may be 0.244 to 0.361 millimeters (mm), that is, the spacing between the boundary line of the fourth projection area and the boundary line of the third projection area may be 0.244 to 0.361 millimeters, such as 0.244 mm, 0.268 mm, 0.32 mm, or 0.361 mm.

[0102] As Figure 8 As shown, the display module 10 further includes an optical adhesive layer 500 and a polarizer disposed between the cover plate 600 and the display panel 100. The polarizer is disposed on the side of the display panel 100 close to the cover plate 600 and is bonded to the cover plate 600 through the optical adhesive layer 500. When the display panel 100 is an LCD display panel, the display module 10 further includes a backlight 300 and a polarizer disposed between the display panel 100 and the backlight 300. For the sake of distinction, the polarizer disposed on the side of the display panel 100 close to the cover plate 600 is hereinafter referred to as the first polarizer 410, and the polarizer disposed on the side of the display panel 100 close to the backlight 300 is hereinafter referred to as the second polarizer 420.

[0103] As Figure 8As shown, when the second light filtering layer 222 is a color ink layer screen-printed on the bottom surface of the cover plate 600, the distance D1 by which the boundary of the color ink layer extends beyond the boundary of the second photosensitive opening 136, the half field of view angle of the display module 10 is α1, and along the direction perpendicular to the array substrate 110, the distance A between the color ink layer and the second photosensitive opening 136 = the thickness of the optical adhesive layer 500 + the thickness of the first polarizing sheet 410 + the thickness of the second substrate. For example, if the screen printing tolerance of the color ink screen-printed on the bottom surface of the cover plate 600 is ±0.1 mm, then the unilateral tolerance is ±0.05 mm, the fitting device accuracy of the cover plate 600 is ±0.1 mm, and the tolerance between the color ink layer and the visible area VA of the cover plate 600 is ±0.07 mm. Therefore, the cumulative tolerance C = sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.13 mm. Considering the refractive indices of the cover plate 600, the optical adhesive layer 500, the first polarizing sheet 410, and the second substrate to be the same, denoted as n, the distance D1 by which the boundary of the color ink layer extends beyond the second photosensitive opening 136 = A * tan(arcsin(sinα1 / n)) + C.

[0104] Taking the half field of view angle α1 to be 30° to 50°, A to be 0.316 mm to 0.386 mm, and n to be 1.5 as an example, the distance D1 by which the boundary of the color ink layer screen-printed on the bottom surface of the cover plate 600 extends beyond the second photosensitive opening 136 is calculated.

[0105] When Amax = 0.386 mm and the half field of view angle is 50°, the distance by which the boundary of the color ink layer extends beyond the second photosensitive opening 136 is:

[0106] D1 = 0.386 * tan30.7° + sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.361 mm.

[0107] When Amax = 0.386 mm and the half field of view angle is 30°, the distance by which the boundary of the color ink layer extends beyond the second photosensitive opening 136 is:

[0108] D1 = 0.386 * tan19.47° + sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.268 mm.

[0109] When Amin = 0.316 mm and the half field of view angle is 50°, the distance by which the boundary of the color ink layer extends beyond the second photosensitive opening 136 is:

[0110] D1 = 0.316 * tan30.7° + sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.320 mm.

[0111] When Amin = 0.316 mm and the half field of view angle is 30°, the distance by which the boundary of the color ink layer extends beyond the boundary of the second photosensitive opening 136 is:

[0112] D1 = 0.316 * tan19.47° + sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.244 mm.

[0113] Therefore, when the second filter layer 222 is a color ink layer screen-printed on the bottom surface of the cover plate 600, if the half field of view angle α1 of the display module 10 is 30° to 50° and the distance between the second filter layer 222 and the second photosensitive opening 136 is 0.316 mm to 0.386 mm, then the distance by which the boundary of the second filter layer 222 extends beyond the boundary of the second photosensitive opening 136 can be 0.244 to 0.361 mm.

[0114] As Figure 9 shown, when the second filter layer 222 is a color ink layer screen-printed on the surface of the color film substrate 130 on the side away from the array substrate 110, the distance by which the boundary of the color ink layer extends beyond the second photosensitive opening 136 is D2. Considering the screen-printing tolerance of the ink and performing screen printing based on the outer shape of the display panel 100, the outer shape tolerance of the display panel 100 is ±0.1 mm, so the unilateral tolerance is ±0.05 mm, and the color ink positioning tolerance is ±0.1 mm. Then the minimum value of D2 can be: sqrt(0.05 * 0.05 + 0.1 * 0.1) = 0.11 mm, that is, D2 is greater than or equal to 0.11 mm.

[0115] Figure 10 shows an exemplary circuit architecture diagram. Refer to Figure 10 , in some embodiments, the display module 10 further includes a processing circuit 230. The processing circuit 230 is electrically connected to the above-mentioned multiple first photosensitive elements 211 ( Figure 10 only one is shown therein) and the above-mentioned second photosensitive element 212 respectively. The processing circuit 230 is configured to identify the light source type based on the first induction signal and the second induction signal. For example, the processing circuit 230 may include a driving chip supporting the light sensing function. For example, the driving chip may be a Touch and Display Driver Integration (TDDI).

[0116] For example, in the case where the first sensing signal and the second sensing signal are current signals, the processing circuit 230 may further include a sampling resistor and an analog-to-digital converter. Each photosensitive element (including the first photosensitive element 211 and the second photosensitive element 212) is respectively provided with its own sampling resistor. For example, the sampling resistor may be provided on the display panel 100, or may also be provided on a circuit board that is bonded to the display panel 100; the analog-to-digital converter may be provided on a circuit board that is bonded to the display panel 100, or may also be integrated in the driving chip.

[0117] The first photosensitive element 211 and the second photosensitive element 212 are respectively electrically connected to the first ends of their corresponding sampling resistors through output signal lines. The second ends of the sampling resistors are grounded, and the first ends of the sampling resistors are electrically connected to the driving chip through the analog-to-digital converter. In this way, the first sensing signal and the second sensing signal can be respectively converted into voltage signals, and then through the analog-to-digital converter, they are converted into digital signals and transmitted to the driving chip. The driving chip processes the collected digital signals to obtain the light components of the corresponding colors, and then determines the light source type of the ambient light by comparing the light components of different colors. Among them, the light component can be characterized by the magnitude of the voltage signal collected by the driving chip, or can also be characterized by the light intensity corresponding to the voltage signal. It should be noted that the greater the light intensity of the external ambient light, the greater the induced current generated by the first photosensitive element 211 and the second photosensitive element 212, and thus the greater the voltage collected by the driving chip, that is, the external ambient light intensity is directly proportional to the magnitude of the voltage signal collected by the driving chip.

[0118] In some embodiments, the above-mentioned multiple first photosensitive elements 211 include a red light photosensitive element 211R, a green light photosensitive element 211G, and a blue light photosensitive element 211B. The driving chip can respectively obtain the red light component, the green light component, and the blue light component in the external ambient light based on the first sensing signals output by the red light photosensitive element 211R, the green light photosensitive element 211G, and the blue light photosensitive element 211B, and obtain the intermediate color light component in the external ambient light based on the second sensing signal output by the second photosensitive element 212, and then determine the light source type of the ambient light by comparing the red light component, the green light component, the blue light component, and the intermediate color light component.

[0119] For example, the driving chip may pre-store the ratios between the primary color light components of different colors of multiple light source types, as well as the ratios between the intermediate color light components and different primary color light components. The driving chip may first obtain the ratios between different primary color light components based on the red light component (XR), blue light component (XB), and green light component (XG) in the external ambient light, such as XR / XB, XB / XG, and XR / XG, and match the obtained ratios with the corresponding ratios of multiple light source types pre-stored to determine the candidate light source type from the above multiple light source types. When there is one candidate light source type obtained by matching, the candidate light source type is determined as the light source type of the external ambient light. When there are two or more candidate light source types obtained by matching, the ratios between the intermediate color light component (XI) in the external ambient light and different primary color light components are further calculated, such as XI / XR, XI / XB, and XI / XG, and the obtained ratios are matched with the corresponding ratios of the candidate light source types to determine the light source type of the external ambient light from the above candidate light source types.

[0120] Alternatively, the driving chip may obtain the ratios between different primary color light components based on the red light component (XR), blue light component (XB), green light component (XG), and intermediate color light component (XI) in the external ambient light, such as XR / XB, XB / XG, and XR / XG, as well as the ratios between the intermediate color light component (XI) and different primary color light components, such as XI / XR, XI / XB, and XI / XG; match the obtained ratios with the corresponding ratios of multiple light source types pre-stored, and determine the light source type of the external ambient light as the matched light source type.

[0121] As Figure 9 shown, in some embodiments, the photosensitive component 200 may further include a third photosensitive element 213, and the third photosensitive element 213 is disposed on the array substrate 110. As Figure 10 shown, the third photosensitive element 213 is also electrically connected to the processing circuit 230. The light-shielding layer 132 covers the third photosensitive element 213, that is, the orthographic projection of the third photosensitive element 213 on the first substrate is within the orthographic projection range of the light-shielding layer 132 on the first substrate. For example, multiple first photosensitive elements 211, second photosensitive elements 212, and third photosensitive elements 213 may be arranged along the first direction, and the third photosensitive element 213 may be arranged between the multiple first photosensitive elements 211 and the second photosensitive elements 212.

[0122] Similar to the first photosensitive element 211 and the second photosensitive element 212, the third photosensitive element 213 also includes M photosensitive transistors arranged in parallel, configured to detect the dark-state brightness information. The dark-state brightness information can be used as a reference value for the first induction signal of the first photosensitive element 211 and the signals collected by the second photosensitive element 212. Since there is leakage current in the photosensitive transistors, the leakage currents of the photosensitive transistors included in the first photosensitive element 211, the second photosensitive element 212, and the third photosensitive element 213 are basically the same. The signals collected by the third photosensitive element 213 can be used to perform noise reduction processing on the first induction signal generated by the first photosensitive element 211 and the second induction signal generated by the second photosensitive element 212, thereby eliminating the influence of the noise and deviation of the first photosensitive element 211 and the second photosensitive element 212 themselves on the detection results, so as to obtain more reliable first induction signal and second induction signal.

[0123] For example, if the first induction signal output by the first photosensitive element 211 and the second induction signal output by the second photosensitive element 212 are current signals, the dark-state current signal output by the third photosensitive element 213 can be subtracted from the first induction signal to obtain the noise-reduced first induction signal, and the dark-state current signal output by the third photosensitive element 213 can be subtracted from the second induction signal to obtain the noise-reduced second induction signal. Then, the noise-reduced first induction signal and second induction signal are further used to identify the light source type of the ambient light. This helps to improve the accuracy of the light source identification result.

[0124] The cover plate 600 is attached to the light-emitting side of the display panel 100 to protect the display panel 100. For example, the cover plate 600 can be a glass cover plate (CG), or it can also be other suitable transparent cover plates, such as UTG (Ultra-Thin Glass) and CPI (Colorless Polyimide) cover plates.

[0125] For the convenience of distinction, the side of the display module 10 where the photosensitive component 200 is provided is called the photosensitive side 101. For example, the photosensitive side 101 can be on the opposite side of the data binding of the display panel 100. Figure 11 A partial plan view of the photosensitive side 101 of the display module 10 according to some embodiments of the present disclosure is shown. Figure 12 Shown is Figure 11 the c-c cross-sectional view in Figure 11 and Figure 12, the cover plate 600 includes a visible area VA and a non-visible area NVA surrounding the visible area VA. A black ink layer 610 is provided on the bottom surface of the cover plate 600 in the non-visible area NVA to block light in the non-visible area NVA. The boundary of the visible area VA and the non-visible area NVA of the cover plate 600 is defined by the boundary of the black ink layer 610 close to the display area AA. The orthographic projection of the display area AA on the bottom surface of the cover plate 600 is located within the visible area VA.

[0126] To prevent the black ink layer 610 from blocking ambient light at large viewing angles from entering the photosensitive component 200 and affecting the test results of the photosensitive component 200, in some embodiments, an avoidance groove 611 is provided at the edge position of the black ink layer 610 close to the photosensitive component 200. The opening of the avoidance groove 611 faces the visible area VA and communicates with the visible area VA. That is to say, the area surrounded by the bottom wall and the side wall of the avoidance groove 611 also belongs to the visible area VA and can transmit external ambient light. When forming the black ink layer 610 on the bottom surface of the cover plate 600, an avoidance design is made at the photosensitive area position, so that the boundary of the visible area VA expands outward at the photosensitive area position, thereby ensuring that ambient light at large viewing angles can also pass through the photosensitive area and enter the photosensitive component 200. Among them, the photosensitive area refers to the area on the cover plate 600 directly opposite the photosensitive component 200, and the boundary of the photosensitive area can be defined according to the boundary of the photosensitive opening corresponding to the photosensitive component 200.

[0127] As Figure 11 shown, the orthographic projection of the photosensitive component 200 on the bottom surface of the cover plate 600 is located between the orthographic projection of the avoidance groove 611 on the bottom surface of the cover plate 600 and the orthographic projection of the display area AA on the bottom surface of the cover plate 600. For example, the boundary of the orthographic projection of the above photosensitive opening (including the first photosensitive opening 135 and the second photosensitive opening 136) on the bottom surface of the cover plate 600 can be used as the boundary of the orthographic projection of the photosensitive component 200 on the bottom surface of the cover plate 600.

[0128] The cover plate 600 and the display panel 100 are adhered through an optical adhesive layer 500. For example, in the adhesion process of the cover plate 600 and the display panel 100, first, the cover plate 600 and the display panel 100 are adhered using an optically clear adhesive (OCA for short), and then the adhered semi-finished product is defoamed and UV ultraviolet cured to increase the adhesion of the optical adhesive and prevent the generation of bubbles.

[0129] For the sake of easy distinction, the boundary of the visible area VA on the photosensitive side 101 is called the first boundary DL1. As Figure 11As shown, the tolerance of the black ink layer 610 in the non-visible area NVA of the cover plate 600 is ±0.1 mm, and the unilateral tolerance is ±0.05 mm. The tolerance of the local step height E at the boundary of the visible area VA is ±0.07 mm, and the bonding accuracy of the cover plate 600 bonding device is ±0.1 mm. Therefore, the cumulative tolerance C = sqrt(0.05 * 0.05 + 0.1 * 0.1 + 0.07 * 0.07) = 0.132 mm. Therefore, in order to ensure that the black light-shielding layer 132 does not block the photosensitive component 200, the boundary segment of the first boundary DL1 adjacent to the photosensitive area needs to be expanded outward by at least 0.13 mm compared to the upper side of the photosensitive area. The "upper side of the photosensitive area" here refers to the side of the photosensitive area close to the first boundary DL1.

[0130] As Figure 11 shown, the first boundary DL1 of the visible area VA includes a reference boundary segment DL11, an extended boundary segment DL12, and a transition boundary segment DL13 connecting the reference boundary segment DL11 and the extended boundary segment DL12. The extended boundary segment DL12 extends outward toward the non-visible area NVA compared to the reference boundary segment DL11 to avoid the photosensitive area. The extended boundary segment DL12 corresponds to the bottom of the avoidance groove 611 of the black ink layer 610, and the transition boundary segment DL13 corresponds to the side wall of the avoidance groove 611 of the black ink layer 610. The boundary of the display area AA close to the photosensitive side 101 is called the second boundary DL2, and the distance between the extended boundary segment DL12 and the second boundary DL2 is greater than the distance between the reference boundary segment DL11 and the second boundary DL2. The "distance" here refers to the distance in the direction parallel to the display panel 100 and perpendicular to the reference boundary segment DL11 and the extended boundary segment DL12 (such as Figure 11 the Y-axis direction in).

[0131] Considering that the display module 10 has a certain viewing angle, the extended boundary segment DL12 needs to be further extended on the basis of the above 0.13 mm to avoid blocking ambient light at large angles, so that the light incident on the photosensitive component 200 is as sufficient as possible, which is beneficial to improving the accuracy of the light source type recognition result.

[0132] Figure 13 shows a schematic diagram of the light path of ambient light incident on the photosensitive component 200. As Figure 13As shown in the figure, the incident angle of the external ambient light on the top surface of the cover plate 600 is β, the refraction angle is α. Along the direction perpendicular to the display panel 100, the distance between the black ink layer 610 on the bottom surface of the cover plate 600 and the corresponding photosensitive opening of the photosensitive component 200 is B. Then B = the thickness of the second substrate + the thickness of the first polarizer 410 + the thickness of the optical adhesive layer 500. The distance from the upper boundary of the photosensitive area to the outer expansion boundary segment DL12 is L0. The upper boundary of the photosensitive area is the boundary of the photosensitive area close to the outer expansion boundary segment DL12. For the convenience of calculation, the refractive indices of the cover plate 600, the optical adhesive layer 500, the first polarizer 410, and the second substrate are still regarded as the same, denoted as n. Then, combined with the above cumulative tolerances, the designed value L1 of the distance from the upper boundary of the photosensitive area to the outer expansion boundary segment DL12 is L1 = L0 + C = B * tanα + B = B * tan(arcsin(sinβ / n)) + C.

[0133] Table 2 shows the designed values L1 of the distance from the upper boundary of the photosensitive area to the outer expansion boundary segment DL12 and the designed values L2 of the distance from the second boundary DL2 of the display area AA to the outer expansion boundary segment DL12 under four different half-field angle specifications (30°, 35°, 45°, and 50°). It should be noted that the designed value L1 of the distance and the designed value L2 of the distance under each half-field angle in Table 2 are obtained when n is taken as 1.5, the thickness of the second substrate is 0.16 mm, the thickness of the first polarizer 410 is 0.076 mm, the thickness of the optical adhesive layer 500 is 0.15 mm, that is, A = 0.386 mm, and the distance from the upper boundary of the photosensitive area to the second boundary DL2 of the display area AA is 0.234 mm. Thus, it can be obtained that when the half-field angle specification angle of the display module 10 is 30° - 50°, the designed value L1 of the distance from the upper boundary of the photosensitive area to the outer expansion boundary segment DL12 is 0.268 - 0.361 mm, and the designed value L2 of the distance from the second boundary DL2 of the display area AA to the outer expansion boundary segment DL12 can be 0.502 - 0.595 mm.

[0134] Table 2

[0135] Half field of view specification L1 (unit: mm) L2 (unit: mm) 30 0.268 0.502 35 0.291 0.526 45 0.338 0.572 50 0.361 0.595

[0136] Since the black ink layer 610 is provided on the bottom surface of the cover plate 600 in the non-visible area NVA, when the optical adhesive layer 500 is attached to the side of the cover plate 600 close to the display panel 100, part of the area of the optical adhesive layer 500 is attached to the bottom surface of the cover plate 600, and part of the area is attached to the black ink layer 610 provided in the non-visible area NVA. However, the inventor found in actual research that due to the above-mentioned avoidance grooves 611 provided in the black ink layer 610, the overlapping width of the optical adhesive layer 500 and the area of the black ink layer 610 provided with the avoidance grooves 611 will be reduced, which will increase the risk of bubbles in the optical adhesive layer 500.

[0137] Figure 14 The structural schematic diagram of the display module 10 according to some embodiments of the present disclosure is shown. As Figure 14 shown, the edge of the optical adhesive layer 500 is recessed compared to the edge of the display panel 100. For example, the recessed distance s can be 0.1 mm to avoid the problem of glue overflow, and the edge of the first polarizer 410 is flush with the edge of the display panel 100. Taking the display panels 100 with two specifications of the frame width of the photosensitive side 101 being 0.9 mm and 1 mm as examples, Table 3, on the basis of Table 2, adds the overlapping width K between the optical adhesive layer 500 and the black ink layer 610 area provided with the avoidance groove 611 in the display panels 100 with two frame width specifications. As shown in Table 3, when the half-field angle specification angle of the display module 10 is 30° to 50°, for the display panel 100 with the frame width of the photosensitive side 101 being 0.9 mm, the overlapping width K is 0.205 - 0.298 mm, and for the display panel 100 with the frame width of the photosensitive side 101 being 1.0 mm, the overlapping width K is 0.305 - 0.398 mm, which cannot meet the design specification requirements of the minimum overlapping width (0.4 mm). It should be noted that the smaller the overlapping width between the optical adhesive layer 500 and the black ink layer 610, the greater the risk of bubbles in the optical adhesive layer 500.

[0138] Table 3

[0139]

[0140] In order to reduce the risk of bubbles in the optical adhesive layer 500, at the position near the photosensitive area, a special-shaped design of locally expanding the optical adhesive layer 500 is made to compensate for the overlapping width lost due to the avoidance groove 611 being provided in the black ink layer 610 at the position near the photosensitive area. Figure 15 The partial plan view of the photosensitive side 101 of the display module 10 according to some other embodiments of the present disclosure is shown. Refer to Figure 15 , the optical adhesive layer 500 includes a main body portion 510 and a compensation portion 520 connected to the main body portion 510. The compensation portion 520 is located on the photosensitive side 101 of the display module 10 and is provided at a position opposite to the photosensitive area. The compensation portion 520 is located on the side of the avoidance groove 611 away from the visible area VA, and the compensation portion 520 protrudes relative to the main body portion 510 in the direction away from the opening of the avoidance groove 611 (such as Figure 15 the positive Y-axis direction in). The orthographic projection of the avoidance groove 611 on the bottom surface of the cover plate 600 is within the orthographic projection range of the main body portion 510 on the bottom surface of the cover plate 600.

[0141] The position of the compensation part 520 is determined according to the position of the photosensitive area. For example, taking the display module 10 applied to a mobile phone as an example, the photosensitive area may be located at the middle position of the top of the mobile phone, and the compensation part 520 is also located at the middle position of the top of the mobile phone.

[0142] As Figure 15 shown, an imaging area CM is provided in the display area AA of the display panel 100. The imaging area CM is configured to transmit imaging light to an image sensor such as a CCD (charge coupled device) disposed under the screen to implement an image capturing function. For example, the shape of the imaging area CM may be circular or may be other suitable shapes. In some embodiments, the orthographic projection of the avoidance groove 611 on the bottom surface of the cover plate 600 may be located between the orthographic projection of the imaging area CM on the bottom surface of the cover plate 600 and the orthographic projection of the compensation part 520 on the bottom surface of the cover plate 600.

[0143] In some embodiments, along the second direction (such as Figure 15 the Y-axis direction in

[0144] ), the outward expansion distance h2 of the compensation part 520 compared to the main body part 510 may be less than or equal to the depth h1 of the avoidance groove 611.

[0145] In some embodiments, the edge of the compensation part 520 far from the main body part 510 extends beyond the edge of the display panel 100. The edge of the main body part 510 may be flush with the edge of the display panel 100, or may be recessed compared to the edge of the display panel 100. This can specifically compensate for the overlapping width of the optical adhesive layer 500 and the black ink layer 610 lost due to the setting of the avoidance groove 611, while reducing the risk of bubbles in the optical adhesive layer 500 and reducing unnecessary glue overflow.

[0146] When the first edge 411 of the first polarizer 410 extends beyond the edge of the display panel 100, the edge of the compensation portion 520 away from the main body portion 510 can be flush with the first edge 411 of the first polarizer 410, and the edge of the main body portion 510 can be recessed compared to the first edge 411 of the first polarizer 410. For example, the edge of the main body portion 510 can be flush with the edge of the display panel 100.

[0147] When the display panel 100 is an LCD display panel, considering that the backlight 300 is usually designed to extend beyond the edge of the display panel 100 by 0.15 - 0.2 mm, the distance that the edge of the compensation portion 520 away from the main body portion 510 extends beyond the edge of the display panel 100 can be 0.1 - 0.15 mm. For example, the compensation portion 520 can extend beyond the edge of the display panel 100 by 0.1 mm, 0.13 mm, or 0.15 mm.

[0148] Figure 16A shows Figure 15 the d-d cross-sectional view in Figure 16B shows Figure 15 the e-e cross-sectional view in. As Figure 16A shown, on the photosensitive side 101 of the display module 10, the first edge 411 of the first polarizer 410 extends beyond the edge of the display panel 100, and the extension distance is denoted as w1. The edge of the compensation portion 520 of the optical adhesive layer 500 extends beyond the edge of the display panel 100 and is flush with the first edge of the first polarizer 410. As Figure 16B shown, the edge of the main body portion 510 of the optical adhesive layer 500 is flush with the edge of the display panel 100.

[0149] Figure 17 shows Figure 15 the partial planar schematic diagram of the optical adhesive layer 500 on the photosensitive side 101 in. As Figure 17 shown, considering the processability of the optical adhesive layer 500, the dimensional tolerance of the step height between the compensation portion 520 and the main body portion 510 (i.e., the outward expansion distance d2 of the protruding portion compared to the main body portion 510) is approximately +0.15 / -0.1 mm, Figure 17 where F in

[0150] Taking the example that the compensation part 520 of the optical adhesive layer 500 extends 0.1 mm beyond the edge of the display panel 100, the overlapping width K between the optical adhesive layer 500 and the area of the black ink layer 610 provided with the avoidance groove 611 is calculated for four different half-field angle specifications (30°, 35°, 45°, and 50°), as shown in Table 4. It can be seen from Table 4 that for the display panel 100 with a frame width of 0.9 mm on the photosensitive side 101, the overlapping width K can reach 0.405 - 0.498 mm; for the display panel 100 with a frame width of 1 mm on the photosensitive side 101, the overlapping width K can reach 0.505 - 0.598 mm, which can meet the design specification requirements of the minimum overlapping width (0.4 mm) and reduce the risk of bubbles in the optical adhesive layer 500.

[0151] Table 4

[0152]

[0153] In some other embodiments, the photosensitive component 200 and the static electricity ring disposed between the photosensitive component 200 and the display area AA can be sunken into the display area AA, occupying the space of several rows of pixels. In this way, the boundary of the visible area VA does not need to perform the above-mentioned local avoidance design, that is, the black ink layer 610 does not need to be provided with the above-mentioned avoidance groove 611, and the large-angle ambient light can normally irradiate the photosensitive component 200, so that the overlapping width between the optical adhesive layer 500 and the black ink layer 610 will not be affected due to avoiding the photosensitive area, and the risk of bubbles in the optical adhesive layer 500 is relatively low.

[0154] For example, in the case where no local avoidance design is performed at the boundary of the visible area VA, when the frame width of the photosensitive side 101 of the display panel 100 is 0.9 mm and the optical adhesive layer 500 is retracted 0.1 mm relative to the edge of the display panel 100, the overlapping width between the optical adhesive layer 500 and the black ink layer 610 is 0.6 mm, meeting the design specification requirements of the minimum overlapping width (0.4 mm).

[0155] Figure 18 Shows a partial plan schematic diagram of the display panel 100 according to some embodiments of the present disclosure. As Figure 18 shown, the peripheral area NA of the display panel 100 may include a first sub-peripheral area NA1 and a second sub-peripheral area NA2 connected to the first sub-peripheral area NA1. The second sub-peripheral area NA2 protrudes towards the display area AA compared to the first sub-peripheral area NA1 and is surrounded by the display area AA. The first sub-peripheral area NA1 surrounds the area composed of the display area AA and the second sub-peripheral area NA2. The display area AA is provided with a plurality of pixels arranged in an array, and several rows of pixels close to the photosensitive component 200 are disconnected at the second sub-peripheral area NA2, that is, are separated into two parts by the second sub-peripheral area NA2.

[0156] For example, the boundary of the display area AA close to the photosensitive side 101 is still referred to as the second boundary DL2, and the second boundary DL2 is bent at a position close to the photosensitive element. As Figure 18 shown, the second boundary DL2 includes a first sub-segment Q1, a second sub-segment Q2, a third sub-segment Q3, a fourth sub-segment Q4, and a fifth sub-segment Q5 that are connected in sequence. Among them, the first sub-segment Q1, the third sub-segment Q3, and the fifth sub-segment Q5 extend along the first direction (such as Figure 18 the X-axis direction in Figure 18 ), and the second sub-segment Q2 and the fourth sub-segment Q4 extend along the second direction (such as

[0157] the Y-axis direction in Figure 18 ). The first sub-segment Q1 and the fifth sub-segment Q5 are substantially on a straight line. Along the second direction, the distance between the third sub-segment Q3 and the edge of the display panel 100 is greater than the distance between the first sub-segment Q1 and the fifth sub-segment Q5 and the edge of the display panel 100. The area enclosed by the second sub-segment Q2, the third sub-segment Q3, and the fourth sub-segment Q4 is the above-mentioned second sub-peripheral area NA2.

[0158] As Figure 10 shown, the second sub-peripheral area NA2 can be located above the imaging area CM. For example, the geometric center point of the second sub-peripheral area NA2 and the geometric center point of the imaging area CM can be located on the central axis extending along the second direction of the display area AA.

[0159] Figure 19 shows a plan view of the photosensitive side 101 of the display module 10 according to some other embodiments of the present disclosure. As Figure 19As shown, the structures of the photosensitive component 200 located on the display panel 100 (such as the multiple first photosensitive elements 211 and the second photosensitive element 212 described above) can be arranged in the second sub-peripheral area NA2, so that the photosensitive area moves downward. In this way, without the need to design an avoidance for the black ink layer 610, sufficient visible distance can be reserved above the photosensitive area to ensure that ambient light at large angles can enter the photosensitive component 200. As Figure 19 shown, the orthographic projection of the edge of the black ink layer 610 close to the photosensitive component 200 on the bottom surface of the cover plate 600 is approximately a straight line, that is, the first boundary DL1 of the visible area VA does not need to be locally expanded near the photosensitive component 200.

[0160] For example, when the half field of view angle of the display module 10 is 50°, in order to prevent the black ink layer 610 from blocking ambient light at large angles from entering the photosensitive component 200, the designed value of the distance from the upper boundary of the photosensitive area to the first boundary DL1 of the visible area VA can be 0.361 mm. When the distance between the first boundary DL1 of the visible area VA and the second boundary DL2 of the display area AA is 0.2 mm, if the photosensitive area is sunk into the display area AA and the distance between the upper boundary of the sunk photosensitive area and the first sub-segment Q1 and the fifth sub-segment Q5 in the second direction reaches 0.161 mm, it is not necessary to design an avoidance for the black ink layer 610 to avoid the photosensitive component 200.

[0161] Figure 20 shows Figure 18 the schematic structural diagram of the U area in. Refer to Figure 20 , the display panel 100 further includes an electrostatic ring 113 disposed in the peripheral area NA to perform electrostatic protection on the conductive structures in the display area AA. For example, the electrostatic ring 113 can be electrically connected to the gate lines and data lines disposed in the display area AA, so as to timely release the static electricity accumulated on the gate lines and data lines through the electrostatic ring 113, prevent excessive static electricity accumulation on circuits such as data lines, gate lines and circuit elements such as thin film transistors from being electrostatically broken down, and thus improve the stability and reliability of the display panel 100 and extend its service life.

[0162] As Figure 20As shown, the static electricity ring 113 includes a first sub-static electricity ring 1131 and a second sub-static electricity ring 1132 electrically connected to the first sub-static electricity ring 1131. The second sub-static electricity ring 1132 is the part of the static electricity ring 113 located between the photosensitive component 200 and the display area AA, and the first sub-static electricity ring 1131 is the remaining part of the static electricity ring 113 except the second sub-static electricity ring 1132. The first sub-static electricity ring 1131 is located in the first sub-peripheral area NA1, and the second sub-static electricity ring 1132 is located in the second sub-peripheral area NA2. For example, as the photosensitive component 200 sinks towards the display area AA, the photosensitive component 200 occupies approximately the space of two rows of pixels in the second direction, and the second sub-static electricity ring 1132 also occupies approximately the space of two rows of pixels in the second direction, totaling approximately the space of four rows of pixels. When the photosensitive component 200 is at the middle position in the first direction, four rows of pixels near the second boundary DL2 of the display area AA are blocked by the sunken photosensitive component 200 and the second sub-static electricity ring 1132 at the middle position, resulting in four rows of pixels not being displayed at the middle position of the top of the screen.

[0163] Figure 21 The structural schematic diagram of a display device according to some embodiments of the present disclosure is shown. As Figure 21 shown, the display device 1000 provided by some embodiments of the present disclosure includes the display module 10 provided by any one of the above embodiments. Thus, the display device 1000 has technical effects corresponding to the beneficial technical effects of the above display module 10.

[0164] For example, the display device 1000 can be any electronic product or component with a display function such as a mobile phone, a laptop computer, a tablet computer, a display screen, a television, a digital photo frame, etc.

[0165] In the above description, no detailed description is made of the technical details such as the composition of each layer of the product. However, those skilled in the art should understand that various technical means can be used to form layers, regions, etc. of the required shapes. In addition, in order to form the same structure, those skilled in the art can also design methods that are not exactly the same as the methods described above. Although the above embodiments are described separately, this does not mean that the measures in each embodiment cannot be used advantageously in combination.

[0166] It should be noted that the drawings of the embodiments of the present disclosure only relate to the structures involved in the embodiments of the present disclosure, and other structures can refer to the general design. Without conflict, the embodiments of the present disclosure and the features in the embodiments can be combined with each other to obtain new embodiments.

[0167] Although some embodiments of the present disclosure have been described, additional changes and modifications can be made by those skilled in the art once they learn the basic inventive concept. Therefore, the appended claims are intended to be construed to include the preferred embodiments as well as all changes and modifications that fall within the scope of the present disclosure.

Claims

1. A display module, characterized in that: The invention comprises a display panel, a photosensitive component and a cover plate covering the display panel, wherein the display panel comprises a display area and a peripheral area surrounding the display area, the photosensitive component comprises a plurality of first photosensitive elements, a second photosensitive element, a plurality of first filter layers corresponding to the plurality of first photosensitive elements, and a second filter layer corresponding to the second photosensitive element, and the plurality of first photosensitive elements and the second photosensitive element are arranged in the peripheral area of ​​the display panel; The first filter layer is disposed on a side of the first photosensitive element close to the cover plate, the first filter layer is configured to transmit any one of three primary color lights in the ambient light, different first filter layers transmit different primary color lights, and the first photosensitive element is configured to collect the corresponding primary color light transmitted by the first filter layer and generate a first sensing signal; The second filter layer is arranged on the side of the second photosensitive element close to the cover plate, and the second filter layer is configured to transmit the intermediate color light in the ambient light whose central wavelength is between the central wavelengths of two adjacent primary colors. The second photosensitive element is configured to collect the intermediate color light transmitted by the second filter layer and generate a second sensing signal.

2. The display module according to claim 1, characterized in that: The first filter layer is arranged in the peripheral area of ​​the display panel, or arranged on the bottom surface of the cover plate; The second filter layer is arranged in the peripheral area of ​​the display panel, or arranged on the bottom surface of the cover plate, and the bottom surface of the cover plate is the surface of the cover plate close to the display panel.

3. The display module according to claim 2, characterized in that: The display panel includes an array substrate, a liquid crystal layer and a color film substrate, the multiple first photosensitive elements and the second photosensitive elements are arranged on the array substrate, the color film substrate includes a base substrate and a shading layer and a color film layer arranged on a side of the base substrate close to the array substrate, the shading layer is provided with a color film opening, a first photosensitive opening corresponding to the first photosensitive element and a second photosensitive opening corresponding to the second photosensitive element, the color film layer is arranged at the color film opening, and the first filter layer is arranged at the first photosensitive opening; the orthographic projection of the second photosensitive opening on the array substrate is located within the orthographic projection range of the second filter layer on the array substrate, and the orthographic projection of the first photosensitive opening on the array substrate is located within the orthographic projection range of the first filter layer on the array substrate.

4. The display module according to claim 3, characterized in that: The second filter layer is arranged on a surface of the color filter substrate at a side away from the array substrate.

5. The display module according to claim 3, characterized in that: When the second filter layer is arranged on the surface of the color filter substrate away from the array substrate, or when the second filter layer is arranged on the bottom surface of the cover plate, the second filter layer is a color ink layer.

6. The display module according to claim 3, characterized in that: The orthographic projection of the first photosensitive opening on the array substrate is a first projection area, the orthographic projection of the first filter layer on the array substrate is a second projection area, the orthographic projection of the second photosensitive opening on the array substrate is a third projection area, and the orthographic projection of the second filter layer on the array substrate is a fourth projection area; When the second filter layer is arranged on the surface of the color film substrate away from the array substrate, or when the second filter layer is arranged on the bottom surface of the cover plate, the distance between the boundary line of the fourth projection area and the boundary line of the third projection area is greater than the distance between the boundary line of the second projection area and the boundary line of the first projection area.

7. The display module according to claim 6, characterized in that: When the second filter layer is disposed on the bottom surface of the cover plate, a distance between a boundary line of the fourth projection area and a boundary line of the third projection area is 0.244-0.361 mm.

8. The display module according to claim 3, characterized in that: The second filter layer is arranged at the second photosensitive opening, and the second filter layer includes a first sub-filter layer and a second sub-filter layer which are stacked, and a light transmission band of the first sub-filter layer overlaps with a light transmission band of the second sub-filter layer, and one of the first sub-filter layer and the second sub-filter layer is configured to transmit red light, and the other is configured to transmit green light, or one of the first sub-filter layer and the second sub-filter layer is configured to transmit green light, and the other is configured to transmit blue light.

9. The display module according to claim 1, characterized in that: The first photosensitive element and the second photosensitive element respectively include M photosensitive transistors arranged in parallel, where M is 50 to 100; The channel shape of the photosensitive transistor is U-shaped.

10. The display module according to any one of claims 1 to 9, characterized in that: The cover plate comprises a visible area and a non-visible area surrounding the visible area, a black ink layer located in the non-visible area is provided on the bottom surface of the cover plate, and an orthographic projection of the display area on the bottom surface of the cover plate is located in the visible area; An avoidance groove is provided at an edge position of the black ink layer close to the photosensitive component, and an opening of the avoidance groove faces the visual area and is connected to the visual area; The orthographic projection of the photosensitive component on the bottom surface of the cover plate is located between the orthographic projection of the avoidance groove on the bottom surface of the cover plate and the orthographic projection of the display area on the bottom surface of the cover plate.

11. The display module according to claim 10, characterized in that: It also includes an optical adhesive layer, which is arranged between the cover plate and the display panel, wherein a part of the optical adhesive layer is bonded to the bottom surface of the cover plate, and a part of the optical adhesive layer is bonded to the black ink layer arranged in the non-visible area; The optical adhesive layer includes a main body and a compensation part connected to the main body, the orthographic projection of the avoidance groove on the bottom surface of the cover plate is located within the orthographic projection range of the main body on the bottom surface of the cover plate, the compensation part is located on the side of the avoidance groove away from the visible area, and the compensation part protrudes relative to the main body in a direction away from the opening of the avoidance groove.

12. The display module according to claim 11, characterized in that: An imaging area is provided in the display area, and the orthographic projection of the avoidance groove on the bottom surface of the cover plate is located between the orthographic projection of the imaging area on the bottom surface of the cover plate and the orthographic projection of the compensation portion on the bottom surface of the cover plate.

13. The display module according to claim 11, characterized in that: It also includes a polarizer arranged between the optical adhesive layer and the display panel, wherein the first edge of the polarizer extends beyond the edge of the display panel, and the first edge is the edge of the polarizer close to the compensation part; the edge of the compensation part away from the main body part extends beyond the edge of the display panel; the distance that the first edge of the polarizer extends beyond the edge of the display panel is greater than or equal to the distance that the compensation part extends beyond the edge of the display panel.

14. The display module according to claim 13, characterized in that: The distance that the edge of the compensation portion away from the main body exceeds the edge of the display panel is 0.1-0.15 mm.

15. The display module according to claim 13, characterized in that: The edge of the main body is flush with the edge of the display panel, or is retracted compared to the edge of the display panel.

16. The display module according to any one of claims 1 to 9, characterized in that: The peripheral area includes a first sub-peripheral area and a second sub-peripheral area connected to the first sub-peripheral area, the second sub-peripheral area protrudes toward the display area compared to the first sub-peripheral area and is surrounded by the display area, and the first sub-peripheral area surrounds an area formed by the display area and the second sub-peripheral area; The photosensitive component is at least partially disposed in the second sub-peripheral area.

17. The display module according to claim 16, characterized in that: The display panel includes an electrostatic ring arranged in the peripheral area, the electrostatic ring includes a first sub-electrostatic ring and a second sub-electrostatic ring electrically connected to the first sub-electrostatic ring, the second sub-electrostatic ring is located between the photosensitive component and the display area, the first sub-electrostatic ring is located in the first sub-peripheral area, and the second sub-electrostatic ring is located in the second sub-peripheral area.

18. The display module according to claim 16, characterized in that: The cover plate comprises a visible area and a non-visible area surrounding the visible area, a black ink layer located in the non-visible area is provided on the bottom surface of the cover plate, and an orthographic projection of the display area on the bottom surface of the cover plate is located in the visible area; The plurality of first photosensitive elements and the second photosensitive element are located in the second sub-peripheral area, and the orthographic projection of the edge of the black ink layer close to the photosensitive component on the bottom surface of the cover plate is a straight line.

19. A display device, characterized in that: include: The display module according to any one of claims 1 to 18.

Images