Display panel, display module and display device
By setting a black matrix and color filter layer to cover the reference sensor in the hole area of the display panel, and combining it with a well-designed thin-film transistor and light-shielding adhesive layer, the interference of external light and backlight on light sensing detection is solved, and high-accuracy light sensing detection is achieved.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2026-03-20
AI Technical Summary
With existing technology, the accuracy of light detection is difficult to optimize after integrating light sensing function on the display panel, and is greatly affected by ambient light and backlight.
Within the hole-edge area of the display panel, a black matrix and color filter layer are stacked to cover the reference sensor to prevent external light from shining on it. The backlight effect is reduced by rationally designing thin-film transistors and light-shielding adhesive layers to cover the reference sensor.
It significantly improves the accuracy of light-sensing detection, reduces interference from external light and backlight, and ensures the precision of detection results.
Smart Images
Figure CN224020388U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of display technology, and more particularly to a display panel, display module, and display device. Background Technology
[0002] Currently, functional integration is a development trend for various products. Integrating light-sensing detection functions on display panels is beneficial for saving costs and enhancing competitiveness. How to optimize the detection accuracy after integration is a research direction in this field. Utility Model Content
[0003] This application proposes a display panel, display module, and display device, which aim to improve detection accuracy.
[0004] In a first aspect, this application provides a display panel including a blind aperture, an aperture edge region surrounding the blind aperture, and a display area located outside the aperture edge region. The display panel also includes an array substrate and a color filter substrate disposed opposite to each other. The array substrate includes a photosensor and a reference sensor, both located in the aperture edge region. The color filter substrate includes a black matrix and a color filter layer. Within the aperture edge region, the color filter layer is disposed on the side of the black matrix closest to the array substrate. Furthermore, within the aperture edge region, the orthographic projection of the black matrix onto the array substrate covers the reference sensor, and the orthographic projection of the color filter layer onto the array substrate also covers the reference sensor.
[0005] In some embodiments, along the direction opposite to the array substrate and the color filter substrate, the color filter layer includes at least a first color resist layer and a second color resist layer stacked together.
[0006] In some embodiments, the first color resist layer is a red color resist layer, and the second color resist layer is a blue color resist layer.
[0007] In some embodiments, the thickness of the black matrix ranges from 1.3 μm to 1.6 μm.
[0008] In some embodiments, both the photosensitive sensor and the reference sensor include thin-film transistors (TFTs). Each TFT includes an active layer and a gate. The active layer is disposed on the side of the gate closest to the color filter substrate. The orthographic projection of the active layer onto the array substrate is within the range of the orthographic projection of the gate onto the array substrate, and the distance between the outer contour of the orthographic projection of the active layer onto the array substrate and the outer contour of the orthographic projection of the gate onto the array substrate ranges from 11 μm to 15 μm.
[0009] Secondly, this application provides a display module, which includes a display panel and a backlight source as described in any of the embodiments of the first aspect above. The backlight source is disposed on the side of the array substrate away from the color filter substrate. The backlight source includes a light-emitting substrate and a light-shielding adhesive layer disposed on the side of the light-emitting substrate near the display panel. The orthographic projection of the light-shielding adhesive layer on the display panel is at least partially located in the hole edge area and covers the reference sensor.
[0010] In some embodiments, the reference sensor includes an outer side away from the blind hole, pointing in the direction of the reference sensor along the center of the blind hole. The distance between the outer side of the reference sensor and the inner contour of the hole edge area is C, the distance between the inner contour of the light-shielding adhesive layer and the inner contour of the hole edge area is M1, the distance between the outer contour of the light-shielding adhesive layer and the inner contour of the light-shielding adhesive layer is M2, and the cumulative positioning tolerance of the light-shielding adhesive layer is E1. Then, E1+M1≤C≤M2-E1+M1.
[0011] In some embodiments, the display module further includes a polarizer, which is located at least on the side of the color filter substrate away from the array substrate. The orthographic projection of the polarizer onto the display panel does not overlap with the area where the photosensor is located.
[0012] In some embodiments, the polarizer includes a through opening, the photosensitive sensor includes an outer side away from the blind hole, and the direction of the photosensitive sensor is along the center of the blind hole. The distance between the outer side of the photosensitive sensor and the inner contour of the hole edge area is X, the cumulative positioning tolerance of the polarizer opening is E2, and the distance between the edge of the polarizer opening and the inner contour of the hole edge area is Y. Then Y≥X+E2.
[0013] Thirdly, this application also provides a display device, which includes a display module and a cover plate as described in any of the embodiments of the second aspect above, wherein the cover plate is located on the side of the color filter substrate away from the array substrate.
[0014] In the embodiments provided in this application, the display panel includes a blind aperture, an aperture edge region surrounding the blind aperture, and a display area located outside the aperture edge region. The display panel also includes an array substrate and a color filter substrate disposed opposite to each other. The array substrate includes a photosensor and a reference sensor, both located in the aperture edge region. The color filter substrate includes a black matrix and a color filter layer. Within the aperture edge region, the color filter layer is disposed on the side of the black matrix closer to the array substrate. Furthermore, within the aperture edge region, the orthographic projection of the black matrix onto the array substrate covers the reference sensor, and the orthographic projection of the color filter layer onto the array substrate also covers the reference sensor. Both the black matrix and the color filter layer prevent external light from illuminating the reference sensor. Their stacked arrangement and combined action significantly reduce the influence of external light, ensuring that the reference sensor, when used as a control group for the photosensor, is unaffected by external light. This allows the reference sensor to be used for temperature compensation calibration of the photosensor, improving the accuracy of light detection.
[0015] The above-mentioned display modules and display devices have the same structure and beneficial technical effects as the display panels provided in some of the above embodiments, and will not be described again here. Attached Figure Description
[0016] To more clearly illustrate the technical solutions in this application, the accompanying drawings used in some embodiments of this application will be briefly described below. Obviously, the drawings described below are only drawings of some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams and are not actual dimensions of the products or actual processes of the methods involved in the embodiments of this application.
[0017] Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application;
[0018] Figure 2 for Figure 1 The image shows a magnified view of the display panel at point P.
[0019] Figure 3 for Figure 1 The diagram shows a partial cross-sectional view of the display panel along AA'.
[0020] Figure 4 The color resist layer spectrum provided in this application;
[0021] Figure 5 A schematic diagram of a thin-film transistor structure provided in an embodiment of this application;
[0022] Figure 6 for Figure 5 The thin-film transistor shown is a partial cross-sectional view along BB'.
[0023] Figure 7 A schematic diagram of light provided for an embodiment of this application;
[0024] Figure 8 This is a schematic diagram of the structure of a display module provided in an embodiment of this application;
[0025] Figure 9 This is a schematic diagram of the structure of a display device provided in an embodiment of this application. Detailed Implementation
[0026] The technical solutions in some embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments provided in this application are within the scope of protection of this application.
[0027] Unless the context otherwise requires, throughout the specification and claims, the term "comprising" is interpreted as open and encompassing, that is, "including, but not limited to".
[0028] Hereinafter, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of embodiments of this application, unless otherwise stated, "a plurality of" means two or more.
[0029] In describing some embodiments, the term "connection" and its derivative expressions may be used. The term "connection" should be interpreted broadly; for example, "connection" can be a fixed connection, a detachable connection, or an integral part; it can be a direct connection or an indirect connection through an intermediate medium. For example, in describing some embodiments, the term "connection" may be used to indicate that two or more components have direct physical or electrical contact with each other.
[0030] In addition, the use of “based on” implies openness and inclusivity, because processes, steps, calculations or other actions “based on” one or more of the stated conditions or values may in practice be based on additional conditions or values beyond those stated.
[0031] It should be understood that when a layer or element is referred to as being on another layer or substrate, it can mean that the layer or element is directly on the other layer or substrate, or that there is an intermediate layer between the layer or element and the other layer or substrate.
[0032] This document describes exemplary embodiments with reference to cross-sectional views, which are intended as idealized exemplary drawings. In the drawings, the thickness of the layers and the area of the regions are enlarged for clarity. Therefore, variations in shape relative to the drawings are contemplated due to, for example, manufacturing techniques and / or tolerances. Thus, exemplary embodiments should not be construed as limited to the shapes of the regions shown herein, but rather include shape deviations caused, for example, by manufacturing processes. For example, etched areas shown as rectangular would typically have curved features. Therefore, the regions shown in the drawings are schematic in nature, and their shapes are not intended to show the actual shapes of the areas of the device, nor are they intended to limit the scope of the exemplary embodiments.
[0033] In related technologies, integrating light-sensing detection functionality onto a display panel is beneficial for cost savings and enhanced competitiveness. To optimize the detection accuracy after integration, this application provides a display panel, such as... Figures 1-3 As shown, Figure 1 This is a schematic diagram of the structure of a display panel provided in an embodiment of this application. Figure 2 for Figure 1 The image shows a magnified view of the display panel at point P. Figure 3 for Figure 1 The diagram shows a partial cross-sectional view of the display panel along AA'.
[0034] See Figures 1-3 The display panel 10 includes a blind aperture Q1, an aperture edge region Q2 surrounding the blind aperture Q1, and a display area Q3 located outside the aperture edge region Q2. The display panel 10 also includes an array substrate 11 and a color filter substrate 12 disposed opposite to each other. The array substrate 11 includes a photosensor and a reference sensor D, such as... Figure 1 As shown, the photosensor includes a red light sensor R, a green light sensor G, and a blue light sensor B. Both the photosensor and the reference sensor D are located in the aperture edge region Q2. The photosensor can be used to detect ambient light, and the reference sensor D serves as a control group to eliminate the influence of interference factors.
[0035] For example, such as Figure 1 As shown, the red light sensor R and the blue light sensor B are located on the left side of the blind hole Q1, and the reference sensor D and the green light sensor G are located on the right side of the blind hole Q1. The four sensors are symmetrically distributed around the blind hole Q1, making full use of the space in the edge area Q2 of the hole. This does not affect the original function of the blind hole Q1, and can also realize the integration of light sensing detection function.
[0036] See Figure 3 The color filter substrate 12 includes a black matrix 13 and a color filter layer 14. In the aperture edge region Q2, the color filter layer 14 is disposed on the side of the black matrix 13 close to the array substrate 11. In the aperture edge region Q2, the orthographic projection of the black matrix 13 on the array substrate 11 covers the reference sensor D, and the orthographic projection of the color filter layer 14 on the array substrate 11 covers the reference sensor D.
[0037] That is, on the side of the color filter substrate 12 closest to the array substrate 11, the black matrix 13 and the color filter layer 14 are stacked, and their orthogonal projections on the array substrate 11 both cover the reference sensor D. Both the black matrix 13 and the color filter layer 14 can prevent external light from shining on the reference sensor D. Their stacked arrangement and combined action can significantly reduce the influence of external light, so that the reference sensor D is not affected by external light when used as a control group for the photosensitive sensor.
[0038] For example, such as Figure 2 and Figure 3As shown, the orthogonal projection of the black matrix 13 onto the array substrate 11 exposes the photosensitive sensor. That is, the black matrix 13 has through-holes in the area corresponding to the photosensitive sensor, and corresponding color resist layers are disposed within the through-holes. This allows the red light photosensitive sensor R, the green light photosensitive sensor G, and the blue light photosensitive sensor B to detect ambient light. During the photosensitive detection process, the photosensitive sensor generates a photocurrent under the influence of ambient light. However, due to interference factors such as temperature, the actual generated photocurrent also includes interference current. Using a reference sensor D as a control group, since the reference sensor D is unaffected by ambient light and its temperature and other conditions are the same as the photosensitive sensor, the current generated by the reference sensor D can be considered as interference current. This interference current is used to compensate and calibrate the photosensitive current generated by the photosensitive sensor. For example, subtracting the interference current detected by the reference sensor D from the photosensitive current generated by the photosensitive sensor yields a photosensitive current with higher accuracy.
[0039] Based on this, in the embodiments of this application, the black matrix 13 and the color filter layer 14 are stacked and work together to significantly reduce external light, so that the reference sensor D is not affected by external light, which is beneficial to improving the accuracy of light detection.
[0040] In some embodiments, see Figure 3 Along the Z direction opposite to the array substrate 11 and the color filter substrate 12, the color filter layer 14 includes at least a first color resist layer 141 and a second color resist layer 142 stacked together. It is understood that the relative positions of the first color resist layer 141 and the second color resist layer 142 are not defined here.
[0041] like Figure 3 As shown, the second color resist layer 142 is located on the side of the first color resist layer 141 away from the color filter substrate 12. In other embodiments, the first color resist layer 141 may also be located on the side of the second color resist layer 142 away from the color filter substrate 12.
[0042] The first color resist layer 141 and the second color resist layer 142 here can use the same material or manufacturing process as the color resist layers corresponding to different colors of sub-pixels in the display area Q3.
[0043] For example, the first color resist layer 141 is a red color resist layer, and the second color resist layer 142 is a blue color resist layer.
[0044] like Figure 4 As shown, Figure 4 The color resist layer spectrum provided in this application shows that the horizontal axis represents wavelength and the vertical axis represents transmittance. The transmittance is a normalized representation, meaning a vertical axis of 1.00 indicates 100% transmittance. Taking light with a wavelength of 440nm as an example, combined with... Figure 4It is understandable that the transmittance of light of this wavelength is approximately 100% when passing through the blue color resist layer 0119B, while the transmittance of light of this wavelength is approximately 0% when passing through the green color resist layer G1580 or the red color resist layer R1580.
[0045] Combination Figure 4 It is known that the light transmission curves of the red color resist layer R1580 and the blue color resist layer 0119B overlap by a small area. When the color filter layer 14 includes both a red and a blue color resist layer, most light cannot pass through it simultaneously. In other words, the color filter layer 14, comprising two color resist layers (red and blue), provides a significantly better light-blocking effect than using a single color resist layer. Furthermore, the combination of red and blue color resist layers offers a superior light-blocking effect compared to combinations of any other two colors. In some embodiments, provided the process dimensions meet design requirements, the color filter layer 14 may also include three color resist layers; this will not be elaborated upon here.
[0046] In this application, the color filter layer 14 includes two color resist layers: a red color resist layer and a blue color resist layer. This can achieve a good light-blocking effect at a lower cost, preventing external light from illuminating the reference sensor D, which is beneficial to improving the accuracy of light detection.
[0047] In some embodiments, the thickness of the black matrix 13 ranges from 1.3 μm to 1.6 μm, for example, 1.3 μm, 1.35 μm, 1.4 μm, 1.45 μm, 1.5 μm, 1.55 μm or 1.6 μm.
[0048] In related studies, the thickness of the black matrix 13 is typically 1.15 μm, with a corresponding optical density value (i.e., the degree of light absorption by the material) of 4.7, resulting in poor light-blocking effect. In the embodiments of this application, the thickness of the black matrix 13 ranges from 1.3 μm to 1.6 μm, and the corresponding optical density value can reach above 5.3, thereby achieving a better light-blocking effect and preventing external light from illuminating the reference sensor D.
[0049] In some embodiments, the color filter substrate 12 includes a 1.3μm thick black matrix, a 2.0μm thick color resist layer, a 1.5μm thick planarization layer, and a 2.3μm thick spacer in the display area Q3, with a total support height of 7.1μm. In the embodiments of this application, the color filter substrate 12 includes a black matrix 13, a color filter layer 14, and a 1.5μm thick planarization layer in the aperture edge area Q2. Taking the color filter layer 14 as an example, which includes two 2.0μm thick color resist layers, when the thickness of the black matrix 13 is in the range of 1.3μm to 1.6μm, its support height ranges from 6.8μm to 7.1μm, which does not exceed the support height of the support material in the display area Q3. This can avoid the interference risk caused by excessive support height in the aperture edge area Q2.
[0050] That is, the thickness of the black matrix 13 in this application ranges from 1.3μm to 1.6μm, which can improve the light-shielding effect of the display panel while avoiding interference risks, greatly reduce the influence of external light on the reference sensor D, and improve the accuracy of light detection.
[0051] In some embodiments, both the photosensor and the reference sensor D include thin-film transistors, such as Figures 5-6 As shown, Figure 5 This is a schematic diagram of a thin-film transistor structure provided in an embodiment of this application. Figure 6 for Figure 5 The thin-film transistor shown is a partial cross-sectional view along BB'.
[0052] The thin-film transistor includes an active layer ACT and a gate. The active layer ACT is made of amorphous silicon and is disposed on the side of the gate near the color filter substrate 12. The orthographic projection of the active layer ACT onto the array substrate 11 is within the range of the orthographic projection of the gate onto the array substrate 11, and the distance N1 between the outer contour of the orthographic projection of the active layer ACT onto the array substrate 11 and the outer contour of the orthographic projection of the gate onto the array substrate 11 ranges from 11 μm to 15 μm.
[0053] In related studies, the photosensor and reference sensor D are affected not only by external light but also by backlight. This application reduces the impact of backlight by rationally designing the size of the gate.
[0054] like Figure 7 As shown, Figure 7 This is a schematic diagram of light provided for an embodiment of this application. Taking reference sensor D as an example, backlight typically shines from one side of the array substrate 11 onto the side of the color filter substrate 12. The orthographic projection of the active layer ACT on the array substrate 11 is within the range of the orthographic projection of the gate on the array substrate 11, so that the vertically shone light is blocked by the gate and cannot shine on the active layer ACT, thereby protecting the reference sensor D from the influence of backlight in the vertical direction.
[0055] Thin-film transistors have very thin film layers. For example, the active layer is 180nm thick and the gate is 400nm thick. In related technologies, the distance between the outer contour of the active layer projected onto the gate and the outer contour of the gate is only 3μm. The gate cannot block the backlight that is obliquely illuminating the active layer. When the obliquely illuminating backlight shines on the active layer, it will cause the reference sensor D to generate a photocurrent. That is, the reference sensor D will be affected by the obliquely illuminating backlight.
[0056] In this application, the distance N1 between the outer contour of the orthographic projection of the active layer ACT on the array substrate 11 and the outer contour of the orthographic projection of the gate on the array substrate 11 ranges from 11 μm to 15 μm. Figure 7 As shown, only large-angle (approaching 90°) light rays in the backlight can illuminate the active layer ACT without being blocked by the gate. The luminance of the large-angle light rays is very low and has virtually no impact. Based on this, the reference sensor D can be immune to the influence of the backlight, further improving the accuracy of light sensing.
[0057] The inventors of this application have discovered that a small distance N1 allows backlight light to illuminate the active layer ACT, affecting the accuracy of light detection. Conversely, an excessively large distance N1 increases the trace capacitance of the thin-film transistor, pulls on the trace signal, increases signal delay, or generates noise. Therefore, the gate size provided in this application is within a reasonable range, ensuring that the reference sensor D is protected from backlight light without affecting the performance of the thin-film transistor.
[0058] Similarly, based on the above, the photosensitive sensor can also be unaffected by backlighting and has good working performance.
[0059] Secondly, this application provides a display module, such as Figure 8 As shown, Figure 8 This is a schematic diagram of a display module provided in an embodiment of this application. The display module 20 includes a display panel 10 and a backlight 21 as described in any of the embodiments of the first aspect above. The backlight 21 is disposed on the side of the array substrate 11 away from the color filter substrate 12. The backlight 21 includes a light-emitting substrate 22 and a light-shielding adhesive layer 23 disposed on the side of the light-emitting substrate 22 near the display panel 10. The orthographic projection of the light-shielding adhesive layer 23 on the display panel 10 is at least partially located in the hole edge region Q2 and covers the reference sensor D.
[0060] For example, in the backlight 21, the backlight can be conducted in the light-emitting substrate 22 and emitted towards the display panel 10. The area of the light-emitting substrate 22 covered by the light-shielding adhesive layer 23 can be called the non-light-emitting area. In the non-light-emitting area, there is no backlight irradiating the display panel 10.
[0061] In this application, the light-shielding adhesive layer 23 projects onto the reference sensor D on the display panel 10. Based on this, the backlight 21 can be used to prevent backlight from shining onto the reference sensor D, thereby protecting the reference sensor D from the backlight and improving the accuracy of light sensing.
[0062] Furthermore, within the display panel 10, the black matrix 13 and the color filter layer 14 are stacked and work together to significantly reduce external light, so that the reference sensor D is not affected by external light.
[0063] That is, within the display module 20, the reference sensor D is neither affected by external light nor by backlight, which helps to improve the accuracy of light sensing detection.
[0064] In some embodiments, such as Figure 8 As shown, the reference sensor D includes an outer side away from the blind hole Q1. The direction from the center of the blind hole Q1 to the reference sensor D is: the distance between the outer contour of the hole edge region Q2 and the inner contour of the hole edge region Q2 is A; the distance between the outer side of the reference sensor D and the inner contour of the hole edge region Q2 is C; the distance between the inner contour of the light-shielding adhesive layer 23 and the inner contour of the hole edge region Q2 is M1; the distance between the outer contour of the light-shielding adhesive layer and the inner contour of the light-shielding adhesive layer is M2; and the cumulative positioning tolerance of the light-shielding adhesive layer 23 is E1. Then, E1+M1≤C≤M2-E1+M1.
[0065] For example, in some embodiments, in the display module 20, the assembly equipment accuracy of the backlight 21 is ±0.1mm, the dimensional tolerance of the backlight 21 is ±0.12mm (±0.06mm on one side), the positioning tolerance of the light-shielding adhesive layer 23 to the frame of the display module 20 is ±0.12mm, and the positioning tolerance of the light-shielding adhesive layer 23 at the blind hole Q1 is ±0.08mm. Based on this, the cumulative positioning tolerance of the light-shielding adhesive layer 23 is...
[0066] Typically, the distance A between the inner and outer contours of the hole edge area Q2 is 0.5mm or 0.6mm, and the distance M2 between the inner and outer contours of the light-shielding adhesive layer 23 is 0.5mm. Taking A as 0.5mm and the two sides of the light-shielding adhesive layer 23 being flush with the two sides of the hole edge area Q2 as an example (i.e., M1 is 0), then 0.185mm≤C≤0.315mm. That is, considering assembly fluctuations, it can be ensured that the orthogonal projection of the light-shielding adhesive layer 23 on the display panel 10 covers the reference sensor D, thereby protecting the reference sensor D from the influence of backlight and improving the accuracy of light sensing detection.
[0067] Taking A as 0.6mm and the outer side of the light-shielding adhesive layer 23 flush with the outer side of the hole edge area Q2 (that is, M1 is 0.1mm) as an example, at this time 0.285mm≤C≤0.415mm, that is, considering the assembly fluctuation, it can be ensured that the orthogonal projection of the light-shielding adhesive layer 23 on the display panel 10 covers the reference sensor D, so that the reference sensor D is not affected by the backlight, which is beneficial to improving the accuracy of light sensing detection.
[0068] Taking A as 0.6mm and the outer side of the light-shielding adhesive layer 23 extending 0.05mm beyond the outer side of the hole edge area Q2 (that is, M1 is 0.15mm) as an example, at this time 0.335mm≤C≤0.465mm, that is, considering the assembly fluctuations, it can be ensured that the orthogonal projection of the light-shielding adhesive layer 23 on the display panel 10 covers the reference sensor D, thereby protecting the reference sensor D from the backlight and improving the accuracy of light sensing detection.
[0069] In some embodiments, such as Figure 8 As shown, the display module 20 also includes a polarizer 24, which is located at least on the side of the color filter substrate 12 away from the array substrate 11. The orthographic projection of the polarizer 24 onto the display panel 10 does not overlap with the area where the photosensor is located.
[0070] It is understood that the display module 20 also includes a polarizer 25 located between the backlight 21 and the display panel 10. The polarizers 24 and 25 are used to absorb light perpendicular to the polarization axis and only allow light parallel to the polarization axis (called the transmission direction) to pass through, thereby converting natural light into linearly polarized light. The polarizers 24 and 25 work together to control the light emission.
[0071] Since external light passes through the polarizer 24 before illuminating the photosensor, the polarizer 24 weakens the light intensity and affects recognition. Therefore, in this embodiment, the orthographic projection of the polarizer 24 on the display panel 10 does not overlap with the area where the photosensor is located. That is, by placing the photosensor in the area without the polarizer, external light can directly illuminate the photosensor, and the light detection process is not affected by the polarizer, which is beneficial to improving the recognition effect and light detection performance.
[0072] In some embodiments, such as Figure 8 As shown, taking the photosensitive sensor R as an example, the polarizer 24 includes a through opening V1, and the photosensitive sensor R includes an outer side away from the blind hole Q1. The direction from the center of the blind hole Q1 to the photosensitive sensor R is: the distance between the outer contour of the hole edge region Q2 and the inner contour of the hole edge region Q2 is A, the distance between the outer side of the photosensitive sensor R and the inner contour of the hole edge region Q2 is X, the cumulative positioning tolerance of the opening V1 of the polarizer 24 is E2, and the distance between the edge of the opening V1 of the polarizer 24 and the inner contour of the hole edge region Q2 is Y. Then, Y≥X+E2.
[0073] For example, the external tolerance of the opening V1 of the polarizer 24 is ±0.1m (±0.05m on one side), the accuracy of the mounting equipment is ±0.1m, and the positioning tolerance of the opening V1 is ±0.1m. Therefore, the cumulative tolerance... To ensure that the polarizer 24 does not obstruct the photosensitive sensor, Y must be greater than or equal to X + 0.15. Furthermore, to prevent reliable color fading in the display module 20, AY must be greater than or equal to 0.25mm.
[0074] Taking A as 0.5mm and E2 as 0.15mm as an example, based on the above requirements, X ≤ 0.1mm can be calculated. In the process, to ensure the implementation of the process, it is usually necessary to set X ≥ 0.03mm.
[0075] That is, when A is 0.5mm and E2 is 0.15mm, the photosensitive sensor can be set within the range of 0.03mm≤X≤0.1mm. With the polarizer 24 set in Y≥X+0.15, it can be ensured that the external light is not affected by the polarizer and directly illuminates the photosensitive sensor, which is beneficial to improve the recognition effect and the light detection performance. In addition, the display module 20 will not have the problem of reliable color fading.
[0076] Similarly, when A is 0.6mm, the photosensitive sensor can be set within the range of 0.03mm≤X≤0.2mm. With the polarizer 24 set in Y≥X+0.15, it can be ensured that the external light is not affected by the polarizer and directly illuminates the photosensitive sensor, which is beneficial to improve the recognition effect and the light detection performance. In addition, the display module 20 will not have the problem of reliable color fading.
[0077] Thirdly, this application also provides a display device, such as... Figure 9 As shown, Figure 9 This is a schematic diagram of a display device provided in an embodiment of this application. The display device 30 includes a display module 20 and a cover plate 31 as described in any of the embodiments of the second aspect above. The cover plate 31 is located on the side of the color filter substrate 12 away from the array substrate 11.
[0078] For example, the display device 30 also includes an optical adhesive layer 32, which is located between the cover plate 31 and the display module 20. In the blind hole Q1 and the hole edge area Q2, both the cover plate 31 and the optical adhesive layer 32 are transparent. There is no screen printing ink on the cover plate 31, so neither of them will block the outside light. Furthermore, the orthographic projection of the polarizer 24 on the display panel 10 does not overlap with the area where the photosensitive sensor is located, so the outside light can directly illuminate the photosensitive sensor, which can ensure the recognition function and light detection performance of the photosensitive sensor.
[0079] Within the display device 30, the black matrix 13 and the color filter layer 14 are stacked and work together to significantly reduce external light, thus preventing the reference sensor D from being affected by external light. Furthermore, the orthogonal projection of the light-shielding adhesive layer 23 onto the display panel 10 covers the reference sensor D, and the backlight 21's own structure prevents backlight from shining onto the reference sensor D. In other words, the reference sensor D is unaffected by both external light and backlight, improving the accuracy of light detection.
[0080] The aforementioned display device 30 can be any device that displays text or images, whether in motion (e.g., video) or still (e.g., image). More specifically, the embodiments are contemplated to be implemented in or associated with a variety of electronic devices, such as (but not limited to) mobile phones, wireless devices, personal data assistants (PDAs), handheld or portable computers, GPS receivers / navigators, cameras, MP4 video players, camcorders, game consoles, watches, clocks, calculators, television monitors, flat panel displays, computer monitors, automotive displays (e.g., odometer displays, etc.), navigators, cockpit controllers and / or displays, displays of camera views (e.g., displays of rearview cameras in vehicles), electronic photographs, electronic billboards or signs, projectors, architectural structures, packaging and aesthetic structures (e.g., displays of images of a piece of jewelry), etc.
[0081] It is understood that the display panel, display module, and display device provided in this application all improve the light detection accuracy by optimizing the design of the reference sensor D, making the reference sensor D unaffected by external light and backlight. In other embodiments, while keeping the original design of the photosensor and reference sensor unchanged, the light detection accuracy can also be improved by adding a set of reference sensors D1. The added reference sensor D1 can be designed according to the optimization scheme of the improved reference sensor D in the embodiments of this application.
[0082] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any variations or substitutions conceived by those skilled in the art within the scope of the technology disclosed in this application should be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.
Claims
1. A display panel, characterized in that, It includes a blind hole, a hole edge area surrounding the blind hole, and a display area located outside the hole edge area; The display panel further includes an array substrate and a color filter substrate disposed opposite to each other. The array substrate includes a photosensitive sensor and a reference sensor, both of which are located in the aperture edge area. The color filter substrate includes a black matrix and a color filter layer. Within the aperture edge region, the color filter layer is disposed on the side of the black matrix closer to the array substrate. Furthermore, within the aperture edge region, the orthographic projection of the black matrix onto the array substrate covers the reference sensor, and the orthographic projection of the color filter layer onto the array substrate covers the reference sensor.
2. The display panel according to claim 1, characterized in that, Along the direction opposite to the array substrate and the color filter substrate, the color filter layer includes at least a first color resist layer and a second color resist layer stacked together.
3. The display panel according to claim 2, characterized in that, The first color resist layer is a red color resist layer, and the second color resist layer is a blue color resist layer.
4. The display panel according to claim 1, characterized in that, The thickness of the black matrix ranges from 1.3 μm to 1.6 μm.
5. The display panel according to claim 1, characterized in that, Both the photosensitive sensor and the reference sensor include thin-film transistors, each thin-film transistor including an active layer and a gate, the active layer being disposed on the side of the gate closer to the color filter substrate; The orthographic projection of the active layer on the array substrate is located within the range of the orthographic projection of the gate on the array substrate, and the distance between the outer contour of the orthographic projection of the active layer on the array substrate and the outer contour of the orthographic projection of the gate on the array substrate is in the range of 11μm to 15μm.
6. A display module, characterized in that, The display panel and backlight as described in any one of claims 1 to 5 are included, wherein the backlight is disposed on the side of the array substrate away from the color filter substrate; The backlight includes a light-emitting substrate and a light-shielding adhesive layer disposed on the side of the light-emitting substrate near the display panel. The orthogonal projection of the light-shielding adhesive layer on the display panel is at least partially located in the edge area of the hole and covers the reference sensor.
7. The display module according to claim 6, characterized in that, The reference sensor includes an outer side away from the blind hole, and points in a direction from the center of the blind hole towards the reference sensor. The distance between the outer side of the reference sensor and the inner contour of the hole edge area is C. The distance between the inner contour of the light-shielding adhesive layer and the inner contour of the hole edge area is M1. The distance between the outer contour of the light-shielding adhesive layer and the inner contour of the light-shielding adhesive layer is M2. The cumulative positioning tolerance of the light-shielding adhesive layer is E1. Then, E1+M1≤C≤M2-E1+M1.
8. The display module according to claim 6, characterized in that, The display module further includes a polarizer, which is located at least on the side of the color filter substrate away from the array substrate; The orthographic projection of the polarizer onto the display panel does not overlap with the area where the photosensor is located.
9. The display module according to claim 8, characterized in that, The polarizer includes a through opening; The photosensitive sensor includes an outer side away from the blind hole, and points in a direction from the center of the blind hole toward the photosensitive sensor. The distance between the outer side of the photosensitive sensor and the inner contour of the hole edge area is X, the cumulative positioning tolerance of the polarizer opening is E2, and the distance between the edge of the polarizer opening and the inner contour of the hole edge area is Y. Then Y≥X+E2.
10. A display device, characterized in that, Includes the display module and cover plate as described in any one of claims 6 to 9; The cover plate is located on the side of the color filter substrate away from the array substrate.