Display panel, display module and display device

Abstract

The invention provides a display panel, a display module and a display device, the display panel comprises a plurality of pixels, at least part of the pixels comprises a photosensitive unit and a plurality of light emitting units, the plurality of light emitting units comprise a first light emitting unit, the first light emitting unit is configured to at least emit first visible light, and the photosensitive unit is configured to detect the first visible light; the light guide layer is located above the pixels and comprises a plurality of light guide structures, and the first visible light emitted by the first light emitting units is received by the light sensing unit through the light guide structures; in the same pixel, the first light emitting unit has a first center line, the light sensing unit has a second center line, the light guide structure has a third center line, a first shortest distance exists between the second center line and the first center line, a second shortest distance exists between the third center line and the first center line, and the first shortest distance is larger than the second shortest distance.

Description

Technical Field

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

[0002] Currently, image recognition has become one of the standard functions of display terminal products. However, the image recognition effect of display terminal products in the related art still has the problem of low signal-to-noise ratio. Summary of the invention

[0003] In order to solve the above technical problems, the present application is proposed. The embodiments of the present application provide a display panel, a display module and a display device.

[0004] In a first aspect, an embodiment of the present application provides a display panel, the display panel comprising: a plurality of pixels, at least some of the pixels comprising a photosensitive unit and a plurality of light-emitting units, the plurality of light-emitting units comprising a first light-emitting unit, the first light-emitting unit being configured to emit at least a first visible light, and the photosensitive unit being configured to detect the first visible light;

[0005] The light guide layer is located above the plurality of pixels and includes a plurality of light guide structures, wherein the first visible light emitted from each first light emitting unit is received by the corresponding photosensitive unit via the corresponding light guide structure;

[0006] In the same pixel, the first light-emitting unit has a first center line, the photosensitive unit has a second center line, and the light-guiding structure corresponding to the photosensitive unit has a third center line, wherein the second center line and the first center line have a first shortest distance, the third center line and the first center line have a second shortest distance, and the first shortest distance is greater than the second shortest distance.

[0007] In combination with the first aspect, in some implementations of the first aspect, in two adjacent pixels, a first light-emitting unit of one of the pixels has a first center line, a photosensitive unit of one of the pixels has a second center line, and a light-guiding structure corresponding to the photosensitive unit of one of the pixels has a third center line, and a first light-emitting unit of the other pixel has a fourth center line;

[0008] There is a third shortest distance between the third center line and the fourth center line, and the second shortest distance is smaller than the third shortest distance.

[0009] In combination with the first aspect, in some implementations of the first aspect, in the same pixel:

[0010] On a cross section passing through the first center line and the second center line, the photosensitive unit has a first edge close to the first light-emitting unit, the light-guiding structure corresponding to the photosensitive unit has a second edge located between the first center line and the third center line, and the shortest distance between the first edge and the first center line is greater than the shortest distance between the second edge and the first center line;

[0011] Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value, and the angle between the line connecting the first edge and the second edge and the first center line is not less than the minimum angle value;

[0012] Preferably, the minimum angle value is 0 degrees;

[0013] Preferably, in the same pixel:

[0014] On a cross section passing through the first center line and the second center line, the photosensitive unit has a third edge away from the first center line, the light guide structure corresponding to the photosensitive unit has a fourth edge away from the first center line, and the shortest distance between the third edge and the first center line is greater than the shortest distance between the fourth edge and the first center line;

[0015] Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a maximum angle value, and the angle between the line connecting the third edge and the fourth edge and the first center line is not less than the maximum angle value;

[0016] Preferably, the maximum angle value is 10 degrees;

[0017] Preferably, the display panel further comprises a substrate, a plurality of pixels are arranged on the substrate, and a portion of the projection of the light guide structure on the substrate is located outside the projection of the photosensitive unit on the substrate;

[0018] Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured to be no less than 0 degrees and no more than 10 degrees.

[0019] In combination with the first aspect, in some implementations of the first aspect, the light guide structure includes:

[0020] A first light-transmitting unit is located above the corresponding pixel, the first light-transmitting unit has a first refractive index, and includes a first groove sunken toward the corresponding pixel;

[0021] A second light-transmitting unit fills the first groove, and the second light-transmitting unit has a second refractive index, wherein the second refractive index is greater than the first refractive index;

[0022] Preferably, on a cross section passing through the first center line and the second center line, a cross section of the second light-transmitting unit filled in the first groove has an arcuate shape;

[0023] Preferably, the first light-transmitting unit and the second light-transmitting unit have an interface. In the cross-section passing through the first center line and the second center line, the interface between the first center line and the third center line has a first curvature, and the interface between the second center line and the third center line has a second curvature, and the first curvature is not equal to the second curvature;

[0024] Preferably, the first curvature is less than the second curvature.

[0025] Combined with the first aspect, in some implementation manners of the first aspect, the display panel further includes a substrate, a plurality of pixels are disposed on the substrate, and the plurality of light-emitting units further include a second light-emitting unit and a third light-emitting unit, and the colors of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are different from each other, where:

[0026] In the same pixel, the central connection lines of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit, and the photosensitive unit form a virtual polygon;

[0027] In the first direction parallel to the substrate, two adjacent pixels share a second light-emitting unit, or two adjacent pixels share a third light-emitting unit;

[0028] Preferably, in the first direction parallel to the substrate, the centers of the second light-emitting units, the centers of the third light-emitting units, and the centers of the photosensitive units in two adjacent pixels are located on a straight line;

[0029] Preferably, in the second direction parallel to the substrate, the centers of the first light-emitting units and the centers of the photosensitive units in two adjacent pixels are located on a straight line, and the first direction and the second direction have an included angle;

[0030] Preferably, the first direction is perpendicular to the second direction;

[0031] Preferably, the plurality of pixels are arranged in multiple rows of pixel groups in the second direction. When the nth row of pixel groups in the multiple rows of pixel groups is displayed, the (n - m)th row of pixel groups in the multiple rows of pixel groups is not displayed;

[0032] Preferably, the value of m is 1 or 2.

[0033] In a second aspect, an embodiment of the present application provides a display module, and the display module includes: a display panel, the display panel includes a plurality of pixels, at least some of the pixels include a photosensitive unit and a plurality of light-emitting units, the plurality of light-emitting units include a first light-emitting unit, and the first light-emitting unit is configured to emit at least first visible light, and the photosensitive unit is configured to detect the first visible light;

[0034] A light guide layer, located above the display panel, includes a plurality of light guide structures, where the first visible light emitted from each first light-emitting unit is received by the corresponding photosensitive unit via the corresponding light guide structure;

[0035] In the same pixel, the first light-emitting unit has a first center line, the photosensitive unit has a second center line, and the light-guiding structure corresponding to the photosensitive unit has a third center line, wherein the second center line and the first center line have a first shortest distance, the third center line and the first center line have a second shortest distance, and the first shortest distance is greater than the second shortest distance.

[0036] In combination with the second aspect, in some implementations of the second aspect, in two adjacent pixels, the first light-emitting unit of one of the pixels has a first center line, the photosensitive unit of one of the pixels has a second center line, and the light-guiding structure corresponding to the photosensitive unit of one of the pixels has a third center line, and the first light-emitting unit of the other pixel has a fourth center line;

[0037] There is a third shortest distance between the third center line and the fourth center line, and the second shortest distance is smaller than the third shortest distance.

[0038] In combination with the second aspect, in some implementations of the second aspect, the display module has a light emitting surface, the photosensitive unit and the first light emitting unit are arranged in the same layer, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value and a maximum angle value, and in the same pixel:

[0039] On a cross section passing through the first center line and the second center line, the width of the first light-emitting unit has a first size, the spacing between the first light-emitting unit and the photosensitive unit has a second size, the width of the photosensitive unit has a third size, and the shortest distance between the first light-emitting unit and the light-emitting surface has a fourth size;

[0040] One half of the second dimension has a first ratio with the fourth dimension, and one half of the sum of the first dimension, the second dimension, and the third dimension has a second ratio with the fourth dimension, the minimum angle value is not less than the arc tangent value of the first ratio, and the maximum angle value is not less than the arc tangent value of the second ratio;

[0041] Preferably, the minimum angle value is 0 degrees and the maximum angle value is 10 degrees.

[0042] In combination with the second aspect, in some implementations of the second aspect, in the same pixel:

[0043] On a cross section passing through the first center line and the second center line, the photosensitive unit has a first edge close to the first light-emitting unit, the light-guiding structure corresponding to the photosensitive unit has a second edge located between the first center line and the third center line, and the shortest distance between the first edge and the first center line is greater than the shortest distance between the second edge and the first center line;

[0044] Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value, and the angle between the line connecting the first edge and the second edge and the first center line is not less than the minimum angle value;

[0045] Preferably, the minimum angle value is 0 degrees;

[0046] Preferably, in the same pixel:

[0047] On a cross section passing through the first center line and the second center line, the photosensitive unit has a third edge away from the first center line, the light guide structure corresponding to the photosensitive unit has a fourth edge away from the first center line, and the shortest distance between the third edge and the first center line is greater than the shortest distance between the fourth edge and the first center line;

[0048] Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a maximum angle value, and the angle between the line connecting the third edge and the fourth edge and the first center line is not less than the maximum angle value;

[0049] Preferably, the maximum angle value is 10 degrees;

[0050] Preferably, the display panel further comprises a substrate, a plurality of pixels are arranged on the substrate, and a portion of the projection of the light guide structure on the substrate is located outside the projection of the photosensitive unit on the substrate;

[0051] The angle between the first visible light detected by the photosensitive unit and the first center line is configured to be no less than 0 degrees and no more than 10 degrees.

[0052] In conjunction with the second aspect, in some implementations of the second aspect, the light guide structure includes:

[0053] A first light-transmitting unit is located above the corresponding pixel, the first light-transmitting unit has a first refractive index, and includes a first groove sunken toward the corresponding pixel;

[0054] A second light-transmitting unit fills the first groove, and the second light-transmitting unit has a second refractive index, wherein the second refractive index is greater than the first refractive index;

[0055] Preferably, on a cross section passing through the first center line and the second center line, a cross section of the second light-transmitting unit filled in the first groove has an arcuate shape;

[0056] Preferably, the first light-transmitting unit and the second light-transmitting unit have an interface, and on a cross section passing through the first center line and the second center line, the interface between the first center line and the third center line has a first curvature, and the interface between the second center line and the third center line has a second curvature, and the first curvature is not equal to the second curvature;

[0057] Preferably, the first curvature is smaller than the second curvature.

[0058] In conjunction with the second aspect, in some implementations of the second aspect, the light guide layer further includes:

[0059] A light absorbing structure, wherein the light absorbing structure has a plurality of first openings, and each light guiding structure is located in a corresponding first opening;

[0060] Preferably, the display panel further includes a substrate, a plurality of pixels are arranged on the substrate, the light absorption structure further includes a plurality of second openings, and the light guide layer further includes:

[0061] A plurality of first color-resistance structures, each of which is located in a corresponding second opening;

[0062] The projection of each first light-emitting unit on the substrate is located within the projection of the corresponding first color-resistance structure on the substrate, or the projection of each first light-emitting unit on the substrate coincides with the projection of the corresponding first color-resistance structure on the substrate;

[0063] Preferably, a partial projection of the photosensitive unit on the substrate is located within a projection of the light absorbing structure on the substrate;

[0064] Preferably, the material of the light-guiding structure is a transparent material;

[0065] Preferably, the light-guiding structure is a color resist, and the light-guiding structure and the first color resist structure have the same color;

[0066] Preferably, the color of the first light-emitting unit, the color of the light-guiding structure and the color of the first color-resistance structure are green;

[0067] Preferably, the light absorbing structure is a black color resist;

[0068] Preferably, the light guide layer is multiplexed as a color filter layer;

[0069] Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value, wherein:

[0070] On a cross section passing through the first center line and the second center line, the first opening has a first inner wall located between the first center line and the third center line, a first angle is formed between the first inner wall and the first center line, and the first angle is not less than a minimum angle value;

[0071] Preferably, in a cross section passing through the first center line and the second center line, the first opening has a second inner wall located between the second center line and the third center line, and a second angle is formed between the second inner wall and the second center line, and the second angle is not less than the first angle.

[0072] In conjunction with the second aspect, in some implementations of the second aspect, the light guide layer further includes:

[0073] A light absorbing structure, wherein the light absorbing structure has a plurality of first openings, and each light guiding structure is located in a corresponding first opening;

[0074] A plurality of lens structures arranged at intervals, each lens structure being located on a side of the corresponding light guide structure away from the display panel;

[0075] Preferably, each lens structure comprises:

[0076] A first light-transmitting unit is located at a side of the corresponding light-guiding structure away from the display panel, the first light-transmitting unit has a first refractive index and includes a first groove sunken toward the corresponding light-guiding structure;

[0077] The second light-transmitting unit fills the first groove, and the second light-transmitting unit has a second refractive index, wherein the second refractive index is greater than the first refractive index.

[0078] In combination with the second aspect, in some implementations of the second aspect, the display panel further includes a substrate, the plurality of pixels are arranged on the substrate, the plurality of light-emitting units further include a second light-emitting unit and a third light-emitting unit, and the colors of the first light-emitting unit, the second light-emitting unit, and the third light-emitting unit are different from each other, wherein:

[0079] In the same pixel, the center lines of the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the photosensitive unit form a virtual polygon;

[0080] In a first direction parallel to the substrate, two adjacent pixels share a second light-emitting unit, or two adjacent pixels share a third light-emitting unit;

[0081] Preferably, in a first direction parallel to the substrate, the center of the second light emitting unit, the center of the third light emitting unit and the center of the photosensitive unit in two adjacent pixels are located on a straight line;

[0082] Preferably, in a second direction parallel to the substrate, the center of the first light emitting unit and the center of the photosensitive unit in two adjacent pixels are located on a straight line, and the first direction and the second direction have an angle;

[0083] Preferably, the first direction is perpendicular to the second direction;

[0084] Preferably, the plurality of pixels are arranged in the second direction into a plurality of rows of pixel groups, and when the nth row of pixel groups in the plurality of rows of pixel groups is displayed, the nmth row of pixel groups in the plurality of rows of pixel groups is not displayed;

[0085] Preferably, the value of m is 1 or 2.

[0086] In a third aspect, an embodiment of the present application provides a display device, which includes a display panel as mentioned in any of the above embodiments; or a display module as mentioned in any of the above embodiments.

[0087] The display panel provided by the embodiment of the present application includes: a plurality of pixels, at least some of the pixels include a photosensitive unit and a plurality of light-emitting units, the plurality of light-emitting units include a first light-emitting unit, the first light-emitting unit is configured to emit at least a first visible light, and the photosensitive unit is configured to detect the first visible light; a light-guiding layer, located above the plurality of pixels, includes a plurality of light-guiding structures, wherein the first visible light emitted from each first light-emitting unit is received by the corresponding photosensitive unit via the corresponding light-guiding structure; in the same pixel, the first light-emitting unit has a first center line, the photosensitive unit has a second center line, and the light-guiding structure corresponding to the photosensitive unit has a third center line, wherein the second center line has a first shortest distance from the first center line, the third center line has a second shortest distance from the first center line, and the first shortest distance is greater than the second shortest distance. In the same pixel, by setting the first shortest distance to be greater than the second shortest distance, that is, in the thickness direction of the substrate, the photosensitive unit and the light-guiding structure are not directly opposite each other, but the center of the light-guiding structure is closer to the first light-emitting unit than the center of the photosensitive unit. In this case, the photosensitive unit in the same pixel can receive more first visible light with a smaller incident angle. Since the light intensity of the first visible light with a smaller incident angle is stronger, the signal intensity of the first visible light received by the photosensitive unit is increased, thereby improving the signal-to-noise ratio. BRIEF DESCRIPTION OF THE DRAWINGS

[0088] By describing the embodiments of the present application in more detail in conjunction with the accompanying drawings, the above and other purposes, features and advantages of the present application will become more apparent. The accompanying drawings are used to provide a further understanding of the embodiments of the present application and constitute a part of the specification. Together with the embodiments of the present application, they are used to explain the present application and do not constitute a limitation of the present application. In the accompanying drawings, the same reference numerals generally represent the same components or steps.

[0089] Figure 1 It is a schematic diagram of the cross-sectional structure of a display module in the related art.

[0090] Figure 2 Shown is a schematic diagram of the top structure of the display panel provided in the first embodiment of the present application.

[0091] Figure 3a For along Figure 2 Schematic diagram of the cross-sectional structure of line A1A2.

[0092] Figure 3b for Figure 3a Schematic diagram of the local structure.

[0093] Figure 4a This is a partial enlarged view of the display panel provided in the first embodiment of the present application from a top view perspective.

[0094] Figure 4b This is a partial enlarged view of the display panel provided in the second embodiment of the present application from a top view perspective.

[0095] Figure 4c This is a partial enlarged view of the display panel provided in the third embodiment of the present application from a top view perspective.

[0096] Figure 4d This is a partial enlarged view of the display panel provided in the fourth embodiment of the present application from a top view perspective.

[0097] Figure 4e This is a partial enlarged view of the display panel provided in the fifth embodiment of the present application from a top view perspective.

[0098] Figure 5 A schematic diagram of the corresponding relationship between the light output angle and the light intensity of a light emitting unit provided in an embodiment of the present application.

[0099] Figure 6 For along Figure 2 Schematic diagram of the cross-sectional structure of line A1A3.

[0100] Figure 7 for Figure 6 Schematic diagram of the local structure.

[0101] Figure 8 Shown is a schematic diagram of a partial cross-sectional structure of a display panel provided in the second embodiment of the present application.

[0102] Fig. 9 A schematic diagram of a partial cross-sectional structure of a display panel provided in the third embodiment of the present application.

[0103] Fig.10 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in the third embodiment of the present application.

[0104] Fig.11 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in the fourth embodiment of the present application.

[0105] Fig.12 Shown is a schematic diagram of the cross-sectional structure of a display panel provided in the fifth embodiment of the present application.

[0106] Fig.13 Shown is a schematic structural diagram of a display panel provided in the sixth embodiment of the present application.

[0107] Fig.14 FIG. 1 is a schematic diagram of the cross-sectional structure of a display module provided in the first embodiment of the present application.

[0108] Fig.15 Shown Fig.14 A schematic diagram of a first partial structure of the display module is shown.

[0109] Fig.16 Shown Fig.14 A second partial structural schematic diagram of the display module is shown.

[0110] Fig.17 for Fig.14 A third partial structural schematic diagram of the display module is shown.

[0111] Fig.18 Shown is a schematic structural diagram of a display module provided in the second embodiment of the present application.

[0112] Fig.19 Shown is a schematic structural diagram of a display module provided in the third embodiment of the present application.

[0113] Fig. 20 Shown is a schematic structural diagram of a display device provided in one embodiment of the present application. DETAILED DESCRIPTION

[0114] Image recognition in display products has a wide range of applications, and image sensors have also emerged. As a type of image sensor, fingerprint sensors provide users with great convenience in application scenarios such as device unlocking and mobile payment. Current fingerprint recognition methods include optical fingerprint recognition, ultrasonic fingerprint recognition, and capacitive fingerprint recognition. Among them, optical fingerprint recognition is widely used because of its greater advantages in power consumption, response speed, cost, etc.

[0115] In some embodiments, fingerprint recognition is achieved by attaching an independent optical fingerprint recognition sensor to the back of the screen. However, in this embodiment, the transmittance of the display product screen is required to be high. However, since display products integrate multiple functions, such as the color filter on encapsulation (COE) technology (also known as "polarizer-free technology"), fanout in AA (FIAA) technology, and low-temperature polycrystalline oxide (LTPO) technology, the transmittance of the display product screen is greatly reduced, which poses a great challenge to the response time, false recognition rate, and rejection rate of fingerprint recognition.

[0116] In view of this, a new type of in-screen optical fingerprint technology has been proposed. This technology integrates the optical fingerprint recognition device into the display panel, does not increase the thickness of the display panel, and can also realize large-area fingerprint recognition. However, this technology is still facing many technical problems, one of which is the low signal-to-noise ratio (SNR, which refers to the ratio between the strength of the useful signal received by the device and the strength of the interference signal received).

[0117] Figure 1 FIG. 1 is a schematic diagram of a cross-sectional structure of a display module in the related art. Figure 1 As shown, the display module includes a substrate 11, a photosensitive unit 121 and a light-emitting unit 122 located on the substrate 11. The photosensitive unit 121 and the light-emitting unit 122 are arranged in the same layer. The display module also includes a light-absorbing layer 131 stacked on the photosensitive unit 121 and the light-emitting unit 122 on the side away from the substrate 11, and the light-absorbing layer 131 encloses to form a light outlet, and the photosensitive unit 121 and the light-emitting unit 122 correspond to a light outlet respectively, and in the thickness direction of the substrate 11, the light outlet is located above the photosensitive unit 121 or the light-emitting unit 122. In this embodiment, the center of the light-emitting unit 122 coincides with the center of the corresponding light outlet, and the center of the photosensitive unit 121 coincides with the center of the corresponding light outlet.

[0118] like Figure 1 As shown, each photosensitive unit 121 is provided with a plurality of light emitting units 122 adjacent thereto. For example, two light emitting units 122 are provided around the photosensitive unit 121, and the two light emitting units 122 are respectively located on opposite sides of the photosensitive unit 121. The photosensitive unit 121 is configured to detect the first visible light L emitted by one of the light emitting units 122. 1 In the case of 1 On the other hand, there will be a problem that the first visible light emitted by another light-emitting unit 122 as noise will also be collected by the photosensitive unit 121. These two reasons will lead to a low signal-to-noise ratio for fingerprint recognition of the display module.

[0119] In view of this, the embodiment of the present application provides a display panel, which increases the signal strength of the useful signal collected by the photosensitive unit and improves the signal-to-noise ratio by adjusting the positional relationship between the light outlet and the photosensitive unit and the light-emitting unit. In a further implementation, the noise collected by the photosensitive unit can also be reduced, further improving the signal-to-noise ratio.

[0120] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0121] Figure 2 Shown is a schematic diagram of the top structure of the display panel provided in the first embodiment of the present application. Figure 3a For along Figure 2 Schematic diagram of the cross-sectional structure of the A1A2 line. Figure 2 and Figure 3a As shown, the display panel includes: a plurality of pixels 12 and a light guide layer 13 .

[0122] Among them, at least part of the pixels 12 include a photosensitive unit 121 and a plurality of light-emitting units 122. For example, when the display panel is configured as a half-screen fingerprint display panel, a part of the pixels 12 include a photosensitive unit 121 and a plurality of light-emitting units 122, and the remaining part of the pixels 12 only include a plurality of light-emitting units 122. For another example, when the display panel is configured as a full-screen fingerprint display panel, each of the plurality of pixels 12 includes a photosensitive unit 121 and a plurality of light-emitting units 122.

[0123] Multiple light emitting units 122 in the same pixel 12 may be configured to emit visible light of different colors. Figure 2 As shown, the pixel 12 includes three light-emitting units 122, and the three light-emitting units 122 emit visible light of different colors. Exemplarily, the three light-emitting units 122 emit red light, green light and blue light respectively. It should be noted that in other embodiments, the pixel 12 may further include a light-emitting unit that emits white light.

[0124] like Figure 2 As shown, the display panel includes a repeating unit 20, and the repeating unit 20 can be used to arrange the replicated patterns of the repeating unit 20 in rows and columns during the pixel arrangement design process to obtain a pixel arrangement diagram of the display panel. Figure 2 As shown, in this embodiment, in the direction of the pixel row, adjacent pixels 12 share one light-emitting unit 12. In the case where one pixel 12 includes three light-emitting units 122 and one photosensitive unit 121, in the direction of the pixel row, four adjacent light-emitting units 122 and two photosensitive units 121 constitute one repeating unit 20. Specifically, three light-emitting units 122 and one photosensitive unit 121 in one pixel 12, and one light-emitting unit 122 and one photosensitive unit 121 in another pixel 12 adjacent to the one pixel 12 constitute one repeating unit 20.

[0125] In the same pixel 12, the plurality of light emitting units 122 include a first light emitting unit 1221, and the first light emitting unit 1221 is configured to emit at least a first visible light L 1 , the photosensitive unit 121 is configured to detect the first visible light L 1 .

[0126] The light guide layer 13 is located above the plurality of pixels 12 and includes a plurality of light guide structures 132. The first visible light L emitted from each first light emitting unit 1221 1 , is received by the corresponding light sensing unit 121 through the corresponding light guiding structure 132. The light guiding structure 132 is used to provide a light guiding path to guide the first visible light L emitted by the first light emitting unit 1221 to the light source 1221. 1 Guided to the photosensitive unit 121. For example, in some embodiments, the light guide layer 13 includes a light absorbing layer 131, the light absorbing layer 131 encloses a plurality of light outlets, and the light guide structure 132 is a color resist structure located in the light outlet or a structure formed of a transparent material.

[0127] Figure 3b for Figure 3a Schematic diagram of the local structure. Figure 3a and Figure 3b As shown, in the same pixel 12, the first light emitting unit 1221 has a first center line CL 1 , the photosensitive unit 121 has a second center line CL 2 The light guide structure 132 corresponding to the photosensitive unit 121 has a third center line CL 3 , where the second center line CL 2 With the first center line CL 1 The shortest distance D between 1 , the third center line CL 3 With the first center line CL 1 The second shortest distance D 2 , the first shortest distance D 1 Greater than the second shortest distance D 2 .

[0128] Among them, in the same pixel 12, the first center line CL of the first light emitting unit 1221 1 , the second center line CL of the photosensitive unit 121 2 The third center line CL of the light guide structure 132 corresponding to the photosensitive unit 121 3 For example, the display panel further includes a substrate 11, a first center line CL of the first light emitting unit 1221 1 , the second center line CL of the photosensitive unit 121 2 The third center line CL of the light guide structure 132 corresponding to the photosensitive unit 121 3are perpendicular to the substrate 11. The second center line CL 2 With the first center line CL 1 The first shortest distance D between 1 Refers to the second center line CL 2 Any point on the first center line CL 1 Draw a perpendicular line, the length of which is the first shortest distance D 1 . The third center line CL 3 With the first center line CL 1 The second shortest distance D between 2 It refers to the third center line CL 3 Any point on the first center line CL 1 Draw a perpendicular line, the length of which is the second shortest distance D 2 .

[0129] According to the display panel provided in this embodiment, in the same pixel 12, by setting the first shortest distance D 1 Greater than the second shortest distance D 2 That is, in the thickness direction of the substrate 11, the photosensitive unit 121 and the light guide structure 132 are not vertically opposite, but the third center line CL of the light guide structure 132 3 Compared to the second center line CL of the photosensitive unit 121 2 Closer to the first light emitting unit 1221 .

[0130] The third center line CL of the light guide structure 132 3 Compared to the second center line CL of the photosensitive unit 121 2 When the light guide structure 132 is closer to the first light emitting unit 1221, the positional relationship between the light guide structure 132 and the light sensing unit 121 can be appropriately adjusted. Several exemplary implementations are given below.

[0131] Figure 4a This is a partial enlarged view of the display panel provided in the first embodiment of the present application from a top view. Figure 4a As shown, in the same pixel 12, the orthographic projection of the light guide structure 132 on the substrate 11 is located within the orthographic projection of the photosensitive unit 121 on the substrate 11. In this case, the opening area of ​​the light guide structure 132 is smaller than the opening area of ​​the photosensitive unit 121.

[0132] The opening shape of any one of the light guide structure 132 , the light sensing unit 121 , and the light emitting unit 122 may be circular or polygonal, such as rectangular or rhombus.

[0133] Figure 4b This is a partial enlarged view of the display panel provided in the second embodiment of the present application from a top view. Figure 4a and Figure 4bIt can be seen that the difference is that, in this embodiment, within the same pixel 12, part of the orthographic projection of the light guide structure 132 on the substrate 11 is located within the orthographic projection of the photosensitive unit 121 on the substrate 11, and the remaining part of the orthographic projection is located outside the orthographic projection of the photosensitive unit 121 on the substrate 11, that is, the orthographic projection of the light guide structure 132 on the substrate 11 and the orthographic projection of the photosensitive unit 121 on the substrate 11 partially overlap. In addition, the part of the orthographic projection of the light guide structure 132 that does not overlap with the photosensitive unit 121 is located on the third center line CL 3 Close to the first light emitting unit 1221 side.

[0134] In this embodiment, if Figure 4b As shown, the opening area of ​​the light guide structure 132 is smaller than the opening area of ​​the photosensitive unit 121 .

[0135] Figure 4c This is a partial enlarged view of the display panel provided in the third embodiment of the present application from a top view. Figure 4c and Figure 4b It can be seen that the difference is that, in this embodiment, the orthographic projection of the part of the light guide structure 132 that does not overlap with the photosensitive unit 121 is located on the third center line CL 3 The opposite sides refer to the first center line CL 1 and the second center line CL 2 An imaginary line connects the two sides.

[0136] Figure 4d This is a partial enlarged view of the display panel provided in the fourth embodiment of the present application from a top view. Figure 4d and Figure 4b , Figure 4c It can be seen that Figure 4d It can be seen as Figure 4b and Figure 4c Specifically, the orthographic projection of the portion of the light guide structure 132 that does not overlap with the photosensitive unit 121 is located on the third center line CL 3 The opposite sides and the third center line CL 3 Close to the first light emitting unit 1221 side.

[0137] Figure 4e This is a partial enlarged view of the display panel provided in the fifth embodiment of the present application from a top view. Figure 4e and Figure 4aIt can be seen that the difference is that, in this embodiment, the orthographic projection of the opening edge line of the light guide structure 132 on the substrate 11 partially overlaps with the orthographic projection of the opening edge line of the photosensitive unit 121 on the substrate 11. For example, the orthographic projection of the opening edge line of the light guide structure 132 on the substrate 11 close to the first center line CL1 overlaps with the orthographic projection of the opening edge line of the photosensitive unit 121 on the substrate 11 close to the first center line CL1.

[0138] Please also read Figure 5 The schematic diagram of the corresponding relationship between the light emitting angle and the light intensity of the light emitting unit shown in FIG. 1 takes the first light emitting unit 1221 as an example, and the first visible light L emitted by the first light emitting unit 1221 is 1 Including the first visible light L at a large angle 11 and the first visible light at a small angle L 12 , compared with the first visible light L at a large angle 11 Light intensity, small angle first visible light L 12 Therefore, under the above configuration, the photosensitive unit 121 in the same pixel can receive more first visible light L with a smaller incident angle. 1 , since the first visible light L with a smaller incident angle 1 The light intensity of the first visible light L received by the photosensitive unit 121 is stronger. 1 The signal strength is increased, that is, the strength of the useful signal received by the photosensitive unit 121 is increased, thereby improving the signal-to-noise ratio.

[0139] In one embodiment, Figure 3a and Figure 3b As shown, in the same pixel 12: at the point passing through the first center line CL 1 and the second center line CL 2 In the cross section, the photosensitive unit 121 has a first edge E close to the first light emitting unit 1221. 1 The light guide structure 132 corresponding to the photosensitive unit 121 has a first center line CL 1 and the third center line CL 2 The second edge E 2 , the first edge E 1 With the first center line CL 1 The shortest distance between 1 Greater than the second edge E 2 With the first center line CL 1 The shortest distance between 2 That is, the second edge E of the light guide structure 132 2 Compared to the first edge E of the photosensitive unit 121 1 Closer to the first light emitting unit 1221 .

[0140] Under the premise that the opening area of ​​the light guide structure 132 is constant, by setting the second edge E of the light guide structure 132 2 Compared to the first edge E of the photosensitive unit 121 1 Closer to the first light emitting unit 1221, the small-angle first visible light L introduced into the light guide structure 132 can be increased. 12 , reducing the large-angle first visible light L introduced into the light guide structure 132 11 .like Figure 3a As shown, due to the small angle first visible light L 12 The light intensity is greater than the first visible light at a large angle L 11 Therefore, the light intensity of the first visible light L collected by the photosensitive unit 121 can be increased. 1 light intensity, thereby improving the fingerprint recognition accuracy.

[0141] In one embodiment, in combination Figure 3a and Figure 3b As shown, the first visible light L detected by the photosensitive unit 112 1 With the first center line CL 1 The angle between them is configured with a minimum angle value α 1 , for example, the minimum angle value is 0 degrees. The first edge E 1 With the second edge E 2 The line connecting the first center line CL 1 The angle α between 2 Not less than the minimum angle value α 1 Among them, the first edge E 1 and the second edge E 2 Any of them can be a straight line or a curve. The first edge E 1 With the second edge E 2 The connection line can be connected with the first edge E 2 The end point close to the substrate 11 and the second edge E 1 The connecting line between the endpoints away from the substrate 11 represents. This arrangement can ensure that it is greater than or equal to the minimum angle value α 1 The first visible light L 1 can be received by the photosensitive unit 121, thereby further improving the first visible light L detected by the photosensitive unit 121 1 light intensity and improve the signal-to-noise ratio.

[0142] In one embodiment, in combination Figure 3a and Figure 3b As shown, the light guide layer 13 includes a light absorption structure 131, the light absorption structure 131 has a plurality of first openings, and each light guide structure 132 is located in a corresponding first opening. Exemplarily, the light absorption structure 131 is a black color resist. The material of the light guide structure 132 is a transparent material.

[0143] In one embodiment, in combination Figure 3a and Figure 3b As shown, the display panel also includes a substrate 11, a plurality of pixels 12 are arranged on the substrate 11, and the light absorption structure 131 also has a plurality of second openings. The light guide layer 13 also includes a plurality of first color resist structures 133, and each first color resist structure 133 is located in a corresponding second opening. Exemplarily, the light guide structure 132 is a color resist and has the same color as the first color resist structure 133. In this case, the light guide structure 132 and the first color resist structure 133 can be prepared simultaneously to simplify the process.

[0144] In one embodiment, in combination Figure 3a and Figure 3b As shown, the color of the first light-emitting unit 1221, the color of the light-guiding structure 132, and the color of the first color-blocking structure 133 are green. Since it can be seen from the comparison of the three primary color light-emitting units, namely the red light-emitting unit, the green light-emitting unit, and the blue light-emitting unit, the light-emitting efficiency of the green light-emitting unit is relatively high, therefore, by configuring the photosensitive unit 121 to detect the green light emitted by the green light-emitting unit, the accuracy of fingerprint recognition can be improved, and at the same time, by setting the light-guiding structure 132 as a green color-blocking structure, the reflection interference of the ambient light in the display panel can be reduced, and the display contrast can be improved.

[0145] In one embodiment, in combination Figure 3a and Figure 3b As shown, the projection of each first light emitting unit 1221 on the substrate 11 is within the projection of the corresponding first color resist structure 133 on the substrate 11; or, the projection of each first light emitting unit 1221 on the substrate 11 coincides with the projection of the corresponding first color resist structure 133 on the substrate 11. In this way, it can be ensured that the first visible light L emitted by the first light emitting unit 1221 is 1 As much light as possible is emitted through the first color resist structure 133 , which has a higher light extraction rate and improves the contrast of the display panel.

[0146] In one embodiment, in combination Figure 3a and Figure 3b As shown, part of the projection of the photosensitive unit 121 on the substrate 11 is located within the projection of the light absorbing structure 131 on the substrate 11, while all of the projection of the non-photosensitive unit 121 on the substrate 11 is located within the projection of the light guiding structure 132 on the substrate 11. In this way, the light absorbing structure 131 can be used to absorb the first visible light emitted by the first light emitting unit 1221 of the adjacent pixel as noise, thereby reducing the noise of fingerprint recognition and improving the signal-to-noise ratio of fingerprint recognition.

[0147] Figure 6 For along Figure 2 Schematic diagram of the cross-sectional structure of line A1A3. Figure 7 for Figure 6 Schematic diagram of the local structure. Figure 6 and Figure 7 As shown, in two adjacent pixels 12, the first light emitting unit 1221 of one of the pixels 12 has a first center line CL 1 The photosensitive unit 121 of the pixel 12 has a second center line CL 2 , and the light guide structure 132 corresponding to the photosensitive unit 121 of the pixel 12 has a third center line CL 3 , the first light emitting unit 1221 of another pixel 12 has a fourth center line CL 4 . The third center line CL 3 With the first center line CL 1 The second shortest distance D 2 , the third center line CL 3 With the fourth center line CL 4 The third shortest distance D 3 , the second shortest distance D 2 Less than the third shortest distance D 3 .

[0148] Based on the second shortest distance D 2 Similar representation method, the third center line CL 3 With the fourth center line CL 4 The third shortest distance between 3 It refers to the third center line CL 3 Any point on the fourth center line CL 4 Draw a perpendicular line, the length of which is the third shortest distance D 3 .

[0149] For the convenience of description, two adjacent pixels 12 are respectively recorded as a first pixel 1201 and a second pixel 1202, and the second shortest distance D 2 Less than the third shortest distance D 3 , that is, the first light emitting unit 1221 in the first pixel 1201 is closer to the light guide structure 132 corresponding to the photosensitive unit 121 in the first pixel 1201 than the first light emitting unit 1221 in the second pixel 1202. In this case, the first visible light L emitted by the first light emitting unit 1221 in the first pixel 1201 received by the light guide structure 132 1 The intensity is higher than the first visible light noise L emitted by the first light emitting unit 1221 in the second pixel 1202. 2 The intensity of the useful signal received by the photosensitive unit 121 in the first pixel 1201 is increased, thereby improving the signal-to-noise ratio.

[0150] In one embodiment, in combination Figure 6 and Figure 7 As shown, in the same pixel 12: at the point passing through the first center line CL 1 and the second center line CL 2 In the cross section, the photosensitive unit 121 has a portion away from the first center line CL 1 The third edge E 3 , the light guide structure 132 corresponding to the photosensitive unit 121 has a distance from the first center line CL 1 The fourth edge of E 4 , the third edge E 3 With the first center line CL 1 The shortest distance between 3 Greater than the fourth edge E 4 With the first center line CL 1 The shortest distance between 4 With such a configuration, the first visible light emitted by the first light emitting unit 1221 of the adjacent pixel (ie, the second pixel 1202 ) and received by the first pixel as noise can be reduced, thereby improving the signal-to-noise ratio.

[0151] In one embodiment, in combination Figure 6 and Figure 7 As shown, the first visible light L detected by the photosensitive unit 121 1 With the first center line CL 1 The angle between them is configured with a maximum angle value β 1 , for example, the maximum angle value β 1 The third edge E 3 With the fourth edge E 4 The line connecting the first center line CL 1 The angle β 2 Not less than the maximum angle value β 1 . Third Edge E 3 With the fourth edge E 4 Any of them can be a straight line or a curve. The third edge E 3 With the fourth edge E 4 The connection line can be connected with the third edge E 3 The end point close to the substrate 11 and the fourth edge E 4 The connecting line between the endpoints away from the substrate 11 represents. This arrangement can ensure that the angle is less than or equal to the maximum angle value β 1 The first visible light L 1 can be received by the photosensitive unit 121, thereby further improving the first visible light L detected by the photosensitive unit 121 1 signal strength and improve the signal-to-noise ratio.

[0152] In one embodiment, the first visible light L detected by the photosensitive unit 121 1 With the first center line CL1 The angle between them is configured to be not less than 0 degrees and not more than 10 degrees. Exemplarily, the angle can be configured to be 0 degrees, 5 degrees or 10 degrees.

[0153] In one embodiment, Figure 6 As shown, the display panel may further include a thin film encapsulation layer 14. Exemplarily, the thin film encapsulation layer 14 includes a first inorganic layer, an organic layer and a second inorganic layer stacked in sequence in a direction gradually away from the substrate 11. Exemplarily, the light guide layer 13 may be disposed in the organic layer.

[0154] In one embodiment, the display panel may further include a driving circuit ( Figure 6 (not shown), located on the side of the photosensitive unit 121 and the light-emitting unit 122 close to the substrate 11. Specifically, the driving circuit includes a pixel circuit and a detection circuit. The pixel circuit is connected to the light-emitting unit 122, and is used to drive the light-emitting unit 122 to emit light according to a predetermined brightness. The detection circuit is connected to the photosensitive unit 121, and is used to detect the size of the electrical signal output by the photosensitive unit 121. Exemplarily, the pixel circuit and the photosensitive circuit both include thin film transistors, wherein the active layer material of the thin film transistor in the pixel circuit is low temperature polycrystalline oxide (Low Temperature Polycrystalline Oxide, LTPO), and the active layer material of the thin film transistor in the photosensitive circuit is indium gallium zinc oxide (In-Ga-Zn-O, abbreviated as: IGZO).

[0155] Figure 8 FIG. 1 is a schematic diagram of a partial cross-sectional structure of a display panel provided in the second embodiment of the present application. Figure 8 and Figure 3b As can be seen from the display panel shown in the figure, the display panel provided by this embodiment and Figure 3b The difference between the display panels shown is that, in this embodiment, the first edge E 1 With the first center line CL 1 The shortest distance between 1 Less than the second edge E 2 With the first center line CL 1 The shortest distance between 2 That is, the second edge E of the light guide structure 132 2 Compared to the first edge E of the photosensitive unit 121 1 It is further away from the first light emitting unit 1221. This has the advantage that as long as the first visible light L1 enters the light guiding structure 132, it can be collected by the photosensitive unit 121, thus reducing the loss.

[0156] Fig. 9 This is a schematic diagram of a partial cross-sectional structure of a display panel provided in the third embodiment of the present application. Fig. 9 and Figure 3b , Figure 8 As can be seen from the display panel shown in the figure, the display panel provided by this embodiment and Figure 3b , Figure 8 The difference between the display panels shown in the figure is that, in this embodiment, the first center line CL 1 and the second center line CL 2 In the cross section, the cross-sectional shape of the first opening enclosed by the light absorption structure 131 is an irregular shape, for example, a non-centrosymmetric shape.

[0157] Specifically, after passing through the first center line CL 1 and the second center line CL 2 In the cross section, the first opening enclosed by the light absorption structure 131 has a first center line CL 1 and the third center line CL 3 The first inner wall S between 1 , the first inner wall S 1 With the first center line CL 1 There is a first angle θ between 1 , and having a second center line CL 2 and the third center line CL 3 The second inner wall S 2 , the second inner wall S 2 With the second center line CL 2 There is a second angle θ between 2 , the second angle θ 2 Not less than the first angle θ 1 That is, the first inner wall S 1 Compared to the second inner wall S 2 The inclination in the direction close to the substrate 11 is equal to or greater than that in the direction close to the substrate 11. This has the advantage that in the same pixel 12, the light guide structure 132 can introduce more first visible light L 1 , and absorb more noise to improve the signal-to-noise ratio.

[0158] Fig.10 FIG. 2 is a schematic diagram of a cross-sectional structure of a display panel provided in the third embodiment of the present application. Fig.10 Compared with the display panel provided in any of the above embodiments, it can be seen that the light guide structure 132 in the display panel provided in this embodiment is different from that in the display panel provided in any of the above embodiments. The light guide structure in this embodiment includes a lens structure.

[0159] Specifically, if Fig.10 As shown, in this embodiment, the light guide structure 132 includes: a first light-transmitting unit 1321 and a second light-transmitting unit 1322. The first light-transmitting unit 1321 is located above the corresponding pixel, and the first light-transmitting unit 1321 has a first refractive index n 1, and includes a first groove that is recessed toward the corresponding pixel. The second light-transmitting unit 1322 fills the first groove, and the second light-transmitting unit 1322 has a second refractive index n 2 . Wherein, the second refractive index n 2 Greater than the first refractive index n 1 Thus, at the first groove, the interface between the first light-transmitting unit 1321 and the second light-transmitting unit 1322 forms a lens structure.

[0160] After passing through the first center line CL 1 and the second center line CL 2 In the cross section, the shape of the first groove can be a triangle, a trapezoid, a hemisphere, etc. The shape of the first groove determines the shape of the second light-transmitting unit 1322 .

[0161] In one embodiment, after passing through the first center line CL 1 and the second center line CL 2 In the cross section, the cross section of the second light-transmitting unit 1322 filled in the first groove is in an arcuate shape. This has the advantage that the interface between the first light-transmitting unit 1321 and the second light-transmitting unit 1322 is a smooth curved surface, which has the effect of buffering stress.

[0162] Fig.11 FIG. 4 is a schematic diagram of a cross-sectional structure of a display panel provided in the fourth embodiment of the present application. Fig.11 and Fig.10 As can be seen from the display panel, Fig.11 and Fig.10 The difference between the display panels shown is that, in this embodiment, the light guide structure 132 is a special-shaped structure, for example, a non-centrosymmetric structure.

[0163] Specifically, the first light-transmitting unit 1321 and the second light-transmitting unit 1322 have an interface, and the interface passes through the first center line CL. 1 and the second center line CL 2 On the cross section, located on the first center line CL 1 and the third center line CL 3 The interface between them has a first curvature K 1 , located on the second center line CL 2 and the third center line CL 3 The interface between them has a second curvature K 2 , the first curvature K 1 Not equal to the second curvature K 2 .

[0164] Preferably, the first curvature K 1 Less than the second curvature K 2 , that is, the first center line CL 1 and the third center line CL3 The interface between them is closer to the second center line CL 2 than the interface between the second center line CL 3 and the third center line CL 2 , which is equivalent to shrinking the interface between the first center line CL 1 and the third center line CL 3 , thereby reducing the size of this interface and preventing the interface from extending above the first light-emitting unit 1221, which affects the light output of the first light-emitting unit 1221 and further avoids abnormal display.

[0165] Fig.12 The following shows a schematic cross-sectional structure diagram of a display panel provided by the fifth embodiment of the present application. As Fig.12 shown, the light guide structure 132 in the display panel provided in this embodiment is equivalent to Fig.11 the combination of the lens structure shown in Figure 3a and the color filter layer shown in Fig.11 , that is, the light guide structure 132 includes Figure 3a the lens structure shown in

[0166] and the color filter layer shown in Fig.11 . The lens structure is located on the side of the color filter layer away from the substrate 11. The first visible light L1 passes through the lens structure and the first photoresist structure in the color filter layer in sequence, and then enters the photosensitive unit 121. Figure 3a For the specific implementation details of the lens structure, please refer to the embodiment shown in

[0167] , and for the specific implementation details of the color filter layer, please refer to the embodiment shown in Fig.11 , which will not be elaborated here. Figure 3a It should be understood that this embodiment only takes Fig.10 the lens structure shown in Fig. 9 and the color filter layer shown in

[0168] Fig.13 as examples. The lens structure can also be replaced with the lens structure in the display panel shown in Fig.13 , and the color filter layer can also be replaced with the color filter layer in the display panel shown in

[0169] In the same pixel 12, the center lines of the first light emitting unit 1221, the second light emitting unit 1222, the third light emitting unit 1223 and the photosensitive unit 121 form a virtual polygon, for example, Fig.13 In the first direction x parallel to the substrate 11 , two adjacent pixels 12 share a second light emitting unit 1222 , or two adjacent pixels 12 share a third light emitting unit 1223 .

[0170] In one embodiment, in a first direction x parallel to the substrate 11, the center of the second light emitting unit 1222, the center of the third light emitting unit 1223 and the center of the photosensitive unit 121 in two adjacent pixels 12 are located on a straight line Z. 1 superior.

[0171] In one embodiment, in the second direction y parallel to the substrate 11, the center of the first light emitting unit 1221 and the center of the photosensitive unit 121 in two adjacent pixels 12 are located on a straight line Z 2 In the embodiment, the first direction x and the second direction y have an angle. Preferably, the first direction x is perpendicular to the second direction y.

[0172] In one embodiment, the plurality of pixels 12 are arranged into a plurality of rows of pixel groups in the second direction y, and when the nth row of pixel groups in the plurality of rows of pixel groups is displayed, the nmth row of pixel groups in the plurality of rows of pixel groups is not displayed, that is, the display panel is controlled to display alternately. Preferably, the value of m is 1 or 2. In this way, during the fingerprint recognition stage, the photosensitive unit 121 can detect the light of the nth row of pixel groups, but cannot detect the light of the nmth row of pixel groups, thereby avoiding the light of the nmth row of pixel groups interfering with the light of the nth row of pixel groups, thereby improving the signal-to-noise ratio of fingerprint recognition.

[0173] The embodiment of the present application also provides a display module. Fig.14 FIG. 1 is a schematic diagram of the cross-sectional structure of a display module provided in the first embodiment of the present application. Fig.15 Shown Fig.14 A schematic diagram of a first partial structure of the display module is shown. Fig.16 Shown Fig.14 The second partial structure diagram of the display module is shown. Fig.14 , Fig.15 and Fig.16 As shown, the display module includes: a display panel 100. The display panel 100 includes a plurality of pixels 12 and a light guide layer 13. At least part of the pixels 12 includes a photosensitive unit 121 and a plurality of light emitting units 122, the plurality of light emitting units 122 include a first light emitting unit 1221, and the first light emitting unit 1221 is configured to emit at least a first visible light L 1 , the photosensitive unit 121 is configured to detect the first visible light L 1The light guide layer 13 is located above the display panel 100 and includes a plurality of light guide structures 132. The first visible light L emitted from each first light emitting unit 122 1 , is received by the corresponding photosensitive unit 121 through the corresponding light guiding structure 132 .

[0174] In the same pixel 12, the first light emitting unit 1221 has a first center line CL 1 , the photosensitive unit 121 has a second center line CL 2 The light guide structure 132 corresponding to the photosensitive unit 121 has a third center line CL 3 , where the second center line CL 2 With the first center line CL 1 The shortest distance D between 1 , the third center line CL 3 With the first center line CL 1 The second shortest distance D 2 , the first shortest distance D 1 Greater than the second shortest distance D 2 .

[0175] According to the display module provided in this embodiment, in the same pixel 12, by setting the first shortest distance D 1 Greater than the second shortest distance D 2 That is, in the thickness direction of the substrate 11, the photosensitive unit 121 and the light guide structure 132 are not vertically opposite, but the third center line CL of the light guide structure 132 3 Compared to the second center line CL of the photosensitive unit 121 2 In this case, the photosensitive unit 121 in the same pixel can receive more first visible light L with a small incident angle. 1 Since the light intensity of the first visible light with a smaller incident angle is stronger, the first visible light L received by the photosensitive unit 121 is increased. 1 signal strength and improve the signal-to-noise ratio.

[0176] In one embodiment, as shown in FIG. Fig.14 and Fig.15 As shown, in two adjacent pixels 12, the first light emitting unit 1221 of one of the pixels 12 has a first center line CL 1 The photosensitive unit 121 of the pixel 12 has a second center line CL 2 , and the light guide structure 132 corresponding to the photosensitive unit 121 of the pixel 12 has a third center line CL 3 , the first light emitting unit 1221 of another pixel 12 has a fourth center line CL 4 . The third center line CL3 With the first center line CL 1 The second shortest distance D 2 , the third center line CL 3 With the fourth center line CL 4 The third shortest distance D 3 , the second shortest distance D 2 Less than the third shortest distance D 3 .

[0177] In this case, the first visible light L emitted by the first light emitting unit 1221 in a pixel 12 received by the light guide structure 132 1 The intensity is higher than the first visible light L emitted by the first light emitting unit 1221 in another pixel 12 as noise. 2 The intensity of the useful signal received by the photosensitive unit 121 in the pixel 12 is increased, thereby improving the signal-to-noise ratio.

[0178] Combination Fig.15 and Fig.16 As shown, the display module has a light emitting surface, the photosensitive unit 121 and the first light emitting unit 1221 are arranged in the same layer, and the first visible light L detected by the photosensitive unit 121 1 With the first center line CL 1 The angle between them is configured with a minimum angle value ɑ 1 and the maximum angle β 1 In the same pixel 12: at the point passing through the first center line CL 1 and the second center line CL 2 In the cross section, the width of the first light emitting unit 1221 has a first dimension x 1 , the distance between the first light emitting unit 1221 and the light sensing unit 121 has a second size x 2 , the width of the photosensitive unit 121 has a third dimension x 3 , the shortest distance between the first light emitting unit 1221 and the light emitting surface has a fourth dimension h; the second dimension x 2 One half of the first dimension x and the fourth dimension h have a first ratio. 1 , second dimension x 2 and the third dimension x 3 The minimum angle value ɑ is one half of the sum of the two dimensions, and has a second ratio with the fourth dimension h. 1 Not less than the inverse tangent of the first ratio, that is Maximum angle value β 1 Not less than the arc tangent of the second ratio, that is In this way, according to the minimum angle value ɑ 1 and the maximum angle β 1 Calculate the first dimension x1 , second dimension x 2 , the third dimension x 3 and a fourth dimension h.

[0179] The first visible light L detected by the photosensitive unit 121 1 With the first center line CL 1 The angle between is configured to be not less than 0 degrees and not more than 10 degrees. For example, the angle can be configured to be 0 degrees, 5 degrees or 10 degrees. In one embodiment, in the process of preparing the display module, the minimum angle value ɑ 1 is configured to 0 degrees, the maximum angle value β 1 is configured to be 10 degrees, or, in some other embodiments, the minimum angle value ɑ 1 is configured to 5 degrees, with a maximum angle value of β 1 The first dimension x is configured to be 10 degrees. 1 , second dimension x 2 , the third dimension x 3 and the fourth dimension h can be configured as a minimum angle value of 0 degrees according to 1 and is configured with a maximum angle value of 10 degrees β 1 Further calculations were performed.

[0180] Combination Fig.14 and Fig.15 As shown, in the same pixel 12: at the point passing through the first center line CL 1 and the second center line CL 2 In the cross section, the photosensitive unit 121 has a first edge E close to the first light emitting unit 1221. 1 The light guide structure 132 corresponding to the photosensitive unit 121 has a first center line CL 1 and the third center line CL 2 The second edge E 2 , the first edge E 1 With the first center line CL 1 The shortest distance between 1 Greater than the second edge E 2 With the first center line CL 1 The shortest distance between 2 That is, the second edge E of the light guide structure 132 2 Compared to the first edge E of the photosensitive unit 121 1 Closer to the first light emitting unit 1221 .

[0181] According to the display module provided in this embodiment, under the premise that the opening area of ​​the light guide structure 132 is constant, by setting the second edge E of the light guide structure 132 2 Compared to the first edge E of the photosensitive unit 1211 Closer to the first light emitting unit 1221, the small-angle first visible light L introduced into the light guide structure 132 can be increased. 12 , reducing the large-angle first visible light L introduced into the light guide structure 132 11 .like Figure 3a As shown, due to the small angle first visible light L 12 The light intensity is greater than the first visible light at a large angle L 11 Therefore, the light intensity of the first visible light L collected by the photosensitive unit 121 can be increased. 1 light intensity, thereby improving the fingerprint recognition accuracy.

[0182] like Fig.14 and Fig.16 As shown, in one embodiment, the first edge E 1 With the second edge E 2 The line connecting the first center line CL 1 The angle between 2 Not less than the minimum angle value ɑ 1 This setting ensures that the angle is greater than or equal to the minimum angle value α 1 The first visible light L 1 can be received by the photosensitive unit 121, thereby further improving the first visible light L detected by the photosensitive unit 121 1 light intensity and improve the signal-to-noise ratio.

[0183] Combination Fig.14 and Fig.15 As shown, in one embodiment, in the same pixel 12: at the point passing through the first center line CL 1 and the second center line CL 2 In the cross section, the photosensitive unit 121 has a portion away from the first center line CL 1 The third edge E 3 , the light guide structure 132 corresponding to the photosensitive unit 121 has a distance from the first center line CL 1 The fourth edge of E 4 , the third edge E 3 With the first center line CL 1 The shortest distance between 3 Greater than the fourth edge E 4 With the first center line CL 1 The shortest distance between 4 With such a configuration, the first visible light emitted by the first light emitting unit 1221 of the adjacent pixel (ie, the second pixel 1202 ) and received by the first pixel as noise can be reduced, thereby improving the signal-to-noise ratio.

[0184] like Fig.14 As shown, in one embodiment, the third edge E 3With the fourth edge E 4 The line connecting the first center line CL 1 The angle β 2 Not less than the maximum angle value β 1 This setting ensures that the angle is less than or equal to the maximum angle value β 1 The first visible light L 1 All of them can be received by the photosensitive unit 121, thereby further improving the signal strength of the first visible light L1 detected by the photosensitive unit 121 and improving the signal-to-noise ratio.

[0185] like Fig.14 As shown, in one embodiment, the display panel 110 further includes a substrate 11, a plurality of pixels 12 are disposed on the substrate 11, and a partial projection of the light guide structure 132 on the substrate 11 is located outside the projection of the photosensitive unit 121 on the substrate 11. In this way, the light guide structure 132 can be closer to the first light emitting unit 1221 than the photosensitive unit 121, and away from the first light emitting unit 1221 in the adjacent pixel, thereby improving the signal-to-noise ratio.

[0186] like Fig.14 As shown, in one embodiment, the light guide layer 13 further includes: a light absorption structure 131 , the light absorption structure 131 has a plurality of first openings, and each light guide structure 132 is located in a corresponding first opening.

[0187] like Fig.14 As shown, in one embodiment, the light guide structure 132 includes a first color resist structure. Specifically, a plurality of pixels 12 are arranged on the substrate 11, and the light absorption structure 131 also has a plurality of second openings. The light guide layer 13 also includes a plurality of first color resist structures, and each first color resist structure is located in a corresponding second opening. The projection of each first light-emitting unit 1221 on the substrate 11 is located within the projection of the corresponding first color resist structure on the substrate 11, that is, the second opening has a certain outward expansion relative to the first light-emitting unit 1221, or the projection of each first light-emitting unit 1221 on the substrate 11 coincides with the projection of the corresponding first color resist structure on the substrate 11. With such a configuration, the contrast of the display module 100 can be improved.

[0188] like Fig.14 As shown, in one embodiment, the partial projection of the photosensitive unit 121 on the substrate 11 is located within the projection of the light absorption structure 131 on the substrate 11. In this way, the light absorption structure 131 can be used to absorb the first visible light emitted by the first light emitting unit 1221 of the adjacent pixel as noise, thereby reducing the noise of fingerprint recognition and improving the signal-to-noise ratio of fingerprint recognition.

[0189] In one embodiment, the material of the light guide structure 132 is a transparent material. For example, the light guide structure 132 is a color resist, and the light guide structure 132 has the same color as the first color resist structure. The color of the first light emitting unit 1221, the color of the light guide structure 132, and the color of the first color resist structure are green. Since it can be seen from the comparison of the three primary color light emitting units, namely the red light emitting unit, the green light emitting unit, and the blue light emitting unit, that the light extraction efficiency of the green light emitting unit is relatively high, therefore, by configuring the photosensitive unit 121 to detect the green light emitted by the green light emitting unit, the accuracy of fingerprint recognition can be improved. At the same time, by setting the light guide structure 132 as a green color resist structure, the reflection interference of the ambient light in the display panel can be reduced, and the display contrast can be improved. .

[0190] In one embodiment, the light absorption structure 132 is a black color resist.

[0191] In one embodiment, the light guide layer 13 is multiplexed into a color filter layer.

[0192] Fig.17 for Fig.14 The third partial structure diagram of the display module is shown. Fig.14 , Fig.16 and Fig.17 As shown, in one embodiment, after passing through the first center line CL 1 and the second center line CL 2 In the cross section, the first opening has a first center line CL 1 and the third center line CL 3 The first inner wall S between 1 , the first inner wall S 1 With the first center line CL 1 There is a first angle θ between 1 , the first angle θ 1 Not less than the minimum angle value ɑ 1 , thereby increasing the signal strength of the first light-emitting unit 113 detected by the photosensitive unit 112.

[0193] In one embodiment, Fig.17 As shown, after passing through the first center line CL 1 and the second center line CL 2 In the cross section, the first opening has a position located at the second center line CL 2 and the third center line CL 3 The second inner wall S 2 , the second inner wall S 2 With the second center line CL 2 There is a second angle θ between 2 , the second angle θ 2 Not less than the first angle θ 1 That is, the first inner wall S1 Compared to the second inner wall S 2 The inclination in the direction close to the substrate 11 is equal to or greater than that in the direction close to the substrate 11. The advantage of this is that in the same pixel 12, the light guide structure 132 can introduce more small-angle first visible light L 1 , improve the signal-to-noise ratio.

[0194] In one embodiment, Fig.14 As shown, the display module may further include a protective layer (Over Coat, OC) 15 and a cover plate 16 which are sequentially stacked on the side of the light guide layer 13 away from the substrate 11. The OC 15 and the cover plate 16 are bonded and fixed by an optical adhesive layer.

[0195] In one embodiment, the display module may further include a touch metal layer (not shown in the figure), which is located between the thin film encapsulation layer 14 and the light emitting unit 122 and the light sensing unit 121 .

[0196] Fig.18 FIG. 2 is a schematic diagram of the structure of a display module provided in the second embodiment of the present application. Fig.18 As shown, the difference between the display module provided in this embodiment and the display module provided in any of the above embodiments is that in this embodiment, the light guide structure 132 is a lens structure. Specifically, the light guide structure 132 includes: a first light-transmitting unit 1321 and a second light-transmitting unit 1322. The first light-transmitting unit 1321 is located above the corresponding pixel 11, and the first light-transmitting unit 1321 has a first refractive index n 1 , and includes a first groove that is recessed toward the corresponding pixel. The second light-transmitting unit 1322 fills the first groove, and the second light-transmitting unit 1322 has a second refractive index n 2 , where the second refractive index n 1 Greater than the first refractive index n 1 .

[0197] In one embodiment, after passing through the first center line CL 1 and the second center line CL 2 In the cross section, the cross section of the second light-transmitting unit 1322 filled in the first groove is in an arcuate shape. This has the advantage that the interface between the first light-transmitting unit 1321 and the second light-transmitting unit 1322 is a smooth curved surface, which has the effect of buffering stress.

[0198] In one embodiment, the first light-transmitting unit 1321 and the second light-transmitting unit 1322 have an interface. 1 and the second center line CL 2 On the cross section, located on the first center line CL 1 and the third center line CL 3 The interface between them has a first curvature K 1, located on the second center line CL 2 and the third center line CL 3 The interface between them has a second curvature K 2 , the first curvature K 1 Not equal to the second curvature K 2 Preferably, the first curvature K 1 Less than the second curvature K 2 , that is, the first center line CL 1 and the third center line CL 3 The interface between the two is compared to the second center line CL 2 and the third center line CL 3 The interface between them is closer to the second center line CL 2 , which is equivalent to the first center line CL 1 and the third center line CL 3 The interface between the two light-emitting elements 1221 and 1224 is retracted, thereby reducing the size of the interface and preventing the interface from extending above the first light-emitting unit 1221 to affect the light emission of the first light-emitting unit 1221, thereby avoiding display abnormalities.

[0199] In one embodiment, Fig.18 As shown, the display module further includes a cover plate 16 , and the cover plate 16 and the display panel 100 are bonded and fixed via an optical adhesive layer 17 .

[0200] Fig.19 FIG. 2 is a schematic diagram of the structure of a display module provided in the third embodiment of the present application. Fig.19 As shown, in this embodiment, the light guide layer 13 includes: a light absorption structure 131, the light absorption structure 131 has a plurality of first openings, and each light guide structure 132 is located in the corresponding first opening; a plurality of lens structures arranged at intervals, and each lens structure is located on the side of the corresponding light guide structure 132 away from the display panel 100.

[0201] In one embodiment, each lens structure includes: a first light-transmitting unit 1321 and a second light-transmitting unit 1322. The first light-transmitting unit 1321 is located on a side of the corresponding light-guiding structure 132 away from the display panel 100. The first light-transmitting unit 1321 has a first refractive index n 1 , and includes a first groove that is recessed toward the corresponding light guide structure 132. The second light-transmitting unit 1322 fills the first groove, and the second light-transmitting unit 1322 has a second refractive index n 2 , where the second refractive index n 2 Greater than the first refractive index n 1 .

[0202] The display panel in the display module provided according to any embodiment of the application may adopt the display panel provided by any of the above embodiments. The technical details not described in the display module embodiment may refer to the display panel embodiment and will not be repeated here.

[0203] The embodiment of the present application also provides a display device. Fig. 20 FIG. 1 is a schematic diagram of the structure of a display device provided by an embodiment of the present application. Fig. 20 As shown, the display device 10 includes a display panel 100 or a display module as mentioned in any of the above embodiments, and its technical principles and effects are similar, which will not be repeated here.

[0204] It is understandable that the display panel 100 or display module can also be applied to other display devices, such as tablet computers, computer monitors, televisions, wearable devices, information query machines, and any other products or components with display functions.

[0205] The basic principles of the present application are described above in conjunction with specific embodiments. However, it should be noted that the advantages, strengths, effects, etc. mentioned in the present application are only examples and not limitations, and it cannot be considered that these advantages, strengths, effects, etc. are required by each embodiment of the present application. In addition, the specific details disclosed above are only for the purpose of illustration and ease of understanding, not for limitation, and the above details do not limit the present application to being implemented by adopting the above specific details.

[0206] It should also be noted that, in the present application, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present application. Although multiple exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize some variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A display panel, It is characterized in that include: a plurality of pixels, at least some of the pixels include a photosensitive unit and a plurality of light-emitting units, the plurality of light-emitting units include a first light-emitting unit, the first light-emitting unit is configured to emit at least a first visible light, and the photosensitive unit is configured to detect the first visible light; a light guide layer, located above the plurality of pixels, comprising a plurality of light guide structures, wherein the first visible light emitted from each of the first light emitting units is received by the corresponding photosensitive unit via the corresponding light guide structure; In the same pixel, the first light-emitting unit has a first center line, the photosensitive unit has a second center line, and the light-guiding structure corresponding to the photosensitive unit has a third center line, wherein a first shortest distance exists between the second center line and the first center line, a second shortest distance exists between the third center line and the first center line, and the first shortest distance is greater than the second shortest distance.

2. The display panel according to claim 1, It is characterized in that In two adjacent pixels, the first light-emitting unit of one of the pixels has the first center line, the photosensitive unit of one of the pixels has the second center line, and the light-guiding structure corresponding to the photosensitive unit of one of the pixels has the third center line, and the first light-emitting unit of the other pixel has a fourth center line; There is a third shortest distance between the third center line and the fourth center line, and the second shortest distance is smaller than the third shortest distance.

3. The display panel according to claim 1, It is characterized in that In the same pixel: On a cross section passing through the first center line and the second center line, the photosensitive unit has a first edge close to the first light-emitting unit, the light-guiding structure corresponding to the photosensitive unit has a second edge located between the first center line and the third center line, and the shortest distance between the first edge and the first center line is greater than the shortest distance between the second edge and the first center line; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value, and the angle between the line connecting the first edge and the second edge and the first center line is not less than the minimum angle value; Preferably, the minimum angle value is 0 degrees; Preferably, in the same pixel: On a cross section passing through the first center line and the second center line, the photosensitive unit has a third edge away from the first center line, the light guide structure corresponding to the photosensitive unit has a fourth edge away from the first center line, and the shortest distance between the third edge and the first center line is greater than the shortest distance between the fourth edge and the first center line; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a maximum angle value, and the angle between the line connecting the third edge and the fourth edge and the first center line is not less than the maximum angle value; Preferably, the maximum angle value is 10 degrees; Preferably, the display panel further comprises a substrate, the plurality of pixels are arranged on the substrate, and a partial projection of the light guide structure on the substrate is located outside a projection of the photosensitive unit on the substrate; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured to be no less than 0 degrees and no more than 10 degrees.

4. The display panel according to claim 1, It is characterized in that The light guide structure comprises: A first light-transmitting unit, located above the corresponding pixel, the first light-transmitting unit having a first refractive index and comprising a first groove sunken toward the corresponding pixel; A second light-transmitting unit filling the first groove, wherein the second light-transmitting unit has a second refractive index, wherein the second refractive index is greater than the first refractive index; Preferably, in a cross section passing through the first center line and the second center line, a cross section of the second light-transmitting unit filled in the first groove has an arcuate shape; Preferably, the first light-transmitting unit and the second light-transmitting unit have an interface, and on a cross section passing through the first center line and the second center line, the interface between the first center line and the third center line has a first curvature, and the interface between the second center line and the third center line has a second curvature, and the first curvature is not equal to the second curvature; Preferably, the first curvature is smaller than the second curvature.

5. The display panel according to claim 1, It is characterized in that The display panel further includes a substrate, the plurality of pixels are arranged on the substrate, the plurality of light emitting units further include a second light emitting unit and a third light emitting unit, and the colors of the first light emitting unit, the second light emitting unit and the third light emitting unit are different from each other, wherein: In the same pixel, a center line connecting the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the photosensitive unit forms a virtual polygon; In a first direction parallel to the substrate, two adjacent pixels share one second light-emitting unit, or two adjacent pixels share one third light-emitting unit; Preferably, in a first direction parallel to the substrate, the center of the second light emitting unit, the center of the third light emitting unit and the center of the photosensitive unit in two adjacent pixels are located on a straight line; Preferably, in a second direction parallel to the substrate, the center of the first light emitting unit and the center of the photosensitive unit in two adjacent pixels are located on a straight line, and the first direction and the second direction have an angle; Preferably, the first direction is perpendicular to the second direction; Preferably, the plurality of pixels are arranged into a plurality of rows of pixel groups in the second direction, and when the nth row of pixel groups in the plurality of rows of pixel groups is displayed, the nmth row of pixel groups in the plurality of rows of pixel groups is not displayed; Preferably, the value of m is 1 or 2.

6. A display module, It is characterized in that include: A display panel, the display panel comprising a plurality of pixels, at least some of the pixels comprising a photosensitive unit and a plurality of light-emitting units, the plurality of light-emitting units comprising a first light-emitting unit, the first light-emitting unit being configured to emit at least a first visible light, and the photosensitive unit being configured to detect the first visible light; a light guide layer, located above the display panel, comprising a plurality of light guide structures, wherein the first visible light emitted from each of the first light emitting units is received by the corresponding photosensitive unit via the corresponding light guide structure; In the same pixel, the first light-emitting unit has a first center line, the photosensitive unit has a second center line, and the light-guiding structure corresponding to the photosensitive unit has a third center line, wherein a first shortest distance exists between the second center line and the first center line, a second shortest distance exists between the third center line and the first center line, and the first shortest distance is greater than the second shortest distance.

7. The display module according to claim 6, It is characterized in that In two adjacent pixels, the first light-emitting unit of one of the pixels has the first center line, the photosensitive unit of one of the pixels has the second center line, and the light-guiding structure corresponding to the photosensitive unit of one of the pixels has the third center line, and the first light-emitting unit of the other pixel has a fourth center line; There is a third shortest distance between the third center line and the fourth center line, and the second shortest distance is smaller than the third shortest distance.

8. The display module according to claim 6, It is characterized in that The display module has a light emitting surface, the photosensitive unit and the first light emitting unit are arranged in the same layer, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value and a maximum angle value, and in the same pixel: On a cross section passing through the first center line and the second center line, the width of the first light-emitting unit has a first size, the spacing between the first light-emitting unit and the photosensitive unit has a second size, the width of the photosensitive unit has a third size, and the shortest distance between the first light-emitting unit and the light-emitting surface has a fourth size; One half of the second size has a first ratio with the fourth size, one half of the sum of the first size, the second size and the third size has a second ratio with the fourth size, the minimum angle value is not less than the arc tangent value of the first ratio, and the maximum angle value is not less than the arc tangent value of the second ratio; Preferably, the minimum angle value is 0 degrees, and the maximum angle value is 10 degrees.

9. The display module according to claim 6, It is characterized in that In the same pixel: On a cross section passing through the first center line and the second center line, the photosensitive unit has a first edge close to the first light-emitting unit, the light-guiding structure corresponding to the photosensitive unit has a second edge located between the first center line and the third center line, and the shortest distance between the first edge and the first center line is greater than the shortest distance between the second edge and the first center line; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value, and the angle between the line connecting the first edge and the second edge and the first center line is not less than the minimum angle value; Preferably, the minimum angle value is 0 degrees; Preferably, in the same pixel: On a cross section passing through the first center line and the second center line, the photosensitive unit has a third edge away from the first center line, the light guide structure corresponding to the photosensitive unit has a fourth edge away from the first center line, and the shortest distance between the third edge and the first center line is greater than the shortest distance between the fourth edge and the first center line; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a maximum angle value, and the angle between the line connecting the third edge and the fourth edge and the first center line is not less than the maximum angle value; Preferably, the maximum angle value is 10 degrees; Preferably, the display panel further comprises a substrate, the plurality of pixels are arranged on the substrate, and a partial projection of the light guide structure on the substrate is located outside a projection of the photosensitive unit on the substrate; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured to be no less than 0 degrees and no more than 10 degrees.

10. The display module according to claim 6, It is characterized in that The light guide structure comprises: A first light-transmitting unit, located above the corresponding pixel, the first light-transmitting unit having a first refractive index and comprising a first groove sunken toward the corresponding pixel; A second light-transmitting unit filling the first groove, wherein the second light-transmitting unit has a second refractive index, wherein the second refractive index is greater than the first refractive index; Preferably, in a cross section passing through the first center line and the second center line, a cross section of the second light-transmitting unit filled in the first groove has an arcuate shape; Preferably, the first light-transmitting unit and the second light-transmitting unit have an interface, and on a cross section passing through the first center line and the second center line, the interface between the first center line and the third center line has a first curvature, and the interface between the second center line and the third center line has a second curvature, and the first curvature is not equal to the second curvature; Preferably, the first curvature is smaller than the second curvature.

11. The display module according to claim 6, It is characterized in that The light guiding layer further comprises: A light absorbing structure, wherein the light absorbing structure has a plurality of first openings, and each of the light guiding structures is located in a corresponding first opening; Preferably, the display panel further includes a substrate, the plurality of pixels are arranged on the substrate, the light absorption structure further includes a plurality of second openings, and the light guide layer further includes: a plurality of first color-resistance structures, each of the first color-resistance structures being located in a corresponding second opening; The projection of each of the first light-emitting units on the substrate is located within the projection of the corresponding first color-resistance structure on the substrate, or the projection of each of the first light-emitting units on the substrate coincides with the projection of the corresponding first color-resistance structure on the substrate; Preferably, a partial projection of the photosensitive unit on the substrate is located within a projection of the light absorbing structure on the substrate; Preferably, the material of the light-guiding structure is a transparent material; Preferably, the light-guiding structure is a color resist, and the light-guiding structure and the first color resist structure have the same color; Preferably, the color of the first light-emitting unit, the color of the light-guiding structure and the color of the first color-resistance structure are green; Preferably, the light absorbing structure is a black color resist; Preferably, the light guide layer is multiplexed into a color filter layer; Preferably, the angle between the first visible light detected by the photosensitive unit and the first center line is configured with a minimum angle value, wherein: On a cross section passing through the first center line and the second center line, the first opening has a first inner wall located between the first center line and the third center line, a first angle is formed between the first inner wall and the first center line, and the first angle is not less than the minimum angle value; Preferably, in a cross section passing through the first center line and the second center line, the first opening has a second inner wall located between the second center line and the third center line, and a second angle is formed between the second inner wall and the second center line, and the second angle is not less than the first angle.

12. The display module according to claim 6, It is characterized in that The light guiding layer further comprises: A light absorbing structure, wherein the light absorbing structure has a plurality of first openings, and each of the light guiding structures is located in a corresponding first opening; a plurality of lens structures arranged at intervals, each of the lens structures being located on a side of the corresponding light guide structure away from the display panel; Preferably, each of the lens structures comprises: A first light-transmitting unit, located at a side of the corresponding light-guiding structure away from the display panel, the first light-transmitting unit having a first refractive index and comprising a first groove sunken toward the corresponding light-guiding structure; The second light-transmitting unit fills the first groove, and the second light-transmitting unit has a second refractive index, wherein the second refractive index is greater than the first refractive index.

13. The display module according to claim 6, It is characterized in that The display panel further includes a substrate, the plurality of pixels are arranged on the substrate, the plurality of light emitting units further include a second light emitting unit and a third light emitting unit, and the colors of the first light emitting unit, the second light emitting unit and the third light emitting unit are different from each other, wherein: In the same pixel, a center line connecting the first light-emitting unit, the second light-emitting unit, the third light-emitting unit and the photosensitive unit forms a virtual polygon; In a first direction parallel to the substrate, two adjacent pixels share one second light-emitting unit, or two adjacent pixels share one third light-emitting unit; Preferably, in a first direction parallel to the substrate, the center of the second light emitting unit, the center of the third light emitting unit and the center of the photosensitive unit in two adjacent pixels are located on a straight line; Preferably, in a second direction parallel to the substrate, the center of the first light emitting unit and the center of the photosensitive unit in two adjacent pixels are located on a straight line, and the first direction and the second direction have an angle; Preferably, the first direction is perpendicular to the second direction; Preferably, the plurality of pixels are arranged into a plurality of rows of pixel groups in the second direction, and when the nth row of pixel groups in the plurality of rows of pixel groups is displayed, the nmth row of pixel groups in the plurality of rows of pixel groups is not displayed; Preferably, the value of m is 1 or 2.

14. A display device, It is characterized in that include: The display panel according to any one of claims 1 to 5; or, A display module as claimed in any one of claims 6 to 13.

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