OLED display screen, optical fingerprint identification device and electronic equipment

Abstract

The application discloses an OLED display screen, an optical fingerprint identification device and electronic equipment. The OLED display screen comprises a light-emitting layer, a color film layer, a first light-shielding matrix and a second light-shielding matrix. The light-emitting layer comprises a plurality of OLED pixels, and the plurality of OLED pixels are separated by the first light-shielding matrix. The color film layer is arranged above the light-emitting layer and comprises a plurality of color filters. The color filters are of the same color as the corresponding OLED pixels below the color filters. The plurality of color filters are separated by the second light-shielding matrix. The OLED display screen has a fingerprint identification area. A plurality of first light-transmitting areas are arranged on the area corresponding to the fingerprint identification area of the first light-shielding matrix. A plurality of second light-transmitting areas are arranged on the area corresponding to the fingerprint identification area of the second light-shielding matrix. The first light-transmitting areas and the second light-transmitting areas can transmit light for optical fingerprint identification from above the OLED display screen to below the OLED display screen, thereby realizing the combination of the POL-less technology and the under-screen optical fingerprint identification technology.

Description

Technical Field

[0001] This application relates to the field of display technology, and more specifically, to an OLED display screen, an optical fingerprint recognition device, and an electronic device. Background Technology

[0002] As electronic products increasingly feature larger screens with higher resolutions and refresh rates, the resulting problems of rapid power consumption and frequent charging have become more challenging. Especially for dynamically folding products, a more pressing issue than reducing energy consumption is maintaining a thinner and lighter form factor after folding. Currently, technologies using color filters (CF) to replace polarizers (POL) have emerged, which not only reduces screen power consumption by 20%-30% but also significantly reduces the overall thickness of OLED displays. This technology is called polarizer-less technology.

[0003] The working principle of polarizer-less technology is that only light of the same color as the pixel can pass through, while other light (incident light and reflected light) will be absorbed by the light-shielding layer. This results in very low optical transmittance of OLED display, less than 0.5%. The optical fingerprint recognition sensor located under the OLED display cannot receive the light reflected back from the finger above the OLED display, and cannot realize under-display optical fingerprint recognition. Summary of the Invention

[0004] To address the shortcomings of existing technologies, this application innovatively provides an OLED display screen, an optical fingerprint recognition device, and an electronic device, achieving a combination of POL-less technology and under-display optical fingerprint recognition technology.

[0005] To achieve the aforementioned technical objectives, the first aspect of this application discloses an OLED display screen, comprising a light-emitting layer, a color filter layer, a first light-shielding matrix, and a second light-shielding matrix.

[0006] The light-emitting layer includes a plurality of OLED pixels, and the plurality of OLED pixels are separated by the first light-shielding matrix;

[0007] The color filter layer is disposed above the light-emitting layer. The color filter layer includes multiple color filters, each corresponding to a OLED pixel. Each color filter is the same color as the OLED pixel below it, and the multiple color filters are separated by the second light-blocking matrix.

[0008] The OLED display screen has a fingerprint recognition area. The first light-blocking matrix has multiple first light-transmitting areas on the area corresponding to the fingerprint recognition area, and the second light-blocking matrix has multiple second light-transmitting areas on the area corresponding to the fingerprint recognition area.

[0009] Furthermore, the incident light angle θ within the OLED display is ≥36°.

[0010] The minimum boundary width of the first light-transmitting area is Φ1 = N1 or Φ1 = H × tanθ. If H × tanθ is greater than 5 μm, then Φ1 = H × tanθ; if H × tanθ is less than or equal to 5 μm, then Φ1 = N1, where N1 ≥ 5 μm; the center-to-center distance between adjacent first light-transmitting areas is d1 < 62.5 μm.

[0011] The minimum boundary width of the second light-transmitting area is Φ2 = N2 or Φ2 = H × tanθ. If H × tanθ is greater than 5 μm, then Φ2 = H × tanθ; if H × tanθ is less than or equal to 5 μm, then Φ2 = N2, where N2 ≥ 5 μm; the center-to-center distance between adjacent second light-transmitting areas is d2 < 62.5 μm.

[0012] Where H is the distance from the bottom surface of the first shading matrix to the top surface of the second shading matrix.

[0013] Furthermore, from the center to the edge of the fingerprint recognition area, the center-to-center distance d1 between adjacent first light-transmitting areas gradually increases;

[0014] And / or, from the center of the fingerprint recognition area to the edge, the minimum boundary width Φ1 of the first light-transmitting area gradually increases.

[0015] Furthermore, from the center to the edge of the fingerprint recognition area, the center-to-center distance d2 between adjacent second light-transmitting areas gradually increases;

[0016] And / or, from the center of the fingerprint recognition area to the edge, the minimum boundary width Φ2 of the second light-transmitting area gradually increases.

[0017] Furthermore, N1 ≥ 7 μm, and / or, N2 ≥ 7 μm.

[0018] Furthermore, the first light-transmitting area is a light-transmitting hole opened on the first light-shielding matrix or a light-transmitting material filled in the first light-shielding matrix;

[0019] And / or, the second light-transmitting area is a light-transmitting hole opened on the second light-blocking matrix or a light-transmitting material filled in the second light-blocking matrix.

[0020] Furthermore, the light-transmitting material is a transparent material.

[0021] Furthermore, the first light-transmitting area is a circle, ellipse, square, rectangle, polygon, or irregular shape; and / or, the second light-transmitting area is a circle, ellipse, square, rectangle, polygon, or irregular shape.

[0022] To achieve the aforementioned technical objectives, a second aspect of this application discloses an optical fingerprint recognition device, comprising the OLED display screen and the optical fingerprint recognition module described in the first aspect.

[0023] The optical fingerprint recognition module is located below the fingerprint recognition area of ​​the OLED display.

[0024] To achieve the aforementioned technical objectives, a third aspect of this application discloses an electronic device, including the optical fingerprint recognition device described in the second aspect.

[0025] The beneficial effects of this application are as follows:

[0026] The OLED display of this application has light-transmitting areas on both the first and second light-blocking matrices. The light-transmitting areas can transmit light used for optical fingerprint recognition from above the OLED display to below the OLED display, where it is received by the optical fingerprint recognition module located below the OLED display for under-display optical fingerprint recognition, thus realizing the combination of POL-less technology and under-display optical fingerprint recognition technology. Attached Figure Description

[0027] Figure 1 This is a longitudinal cross-sectional view of an OLED display screen according to an embodiment of this application.

[0028] Figure 2 This is a longitudinal sectional view of a first and a second light-blocking matrix according to an embodiment of this application.

[0029] Figure 3 This is a longitudinal sectional view of the first and second light-blocking matrices according to another embodiment of this application.

[0030] Figure 4 This is a top view of the first light-blocking matrix according to an embodiment of this application.

[0031] Figure 5 This is a schematic diagram of the half-field optical path of the under-display optical fingerprint recognition module according to an embodiment of this application.

[0032] Figure 6a It is the field of view of the optical fingerprint recognition module under the existing OLED display technology.

[0033] Figure 6b This is the field of view of the optical fingerprint recognition module when the incident light angle inside the POL-less display is 24°.

[0034] Figure 7 It is a simulation curve showing the relationship between the size of the light-transmitting area and the strength of the fingerprint signal.

[0035] Figure 8 This is a schematic diagram of an optical fingerprint recognition device according to an embodiment of this application.

[0036] In the picture,

[0037] 1. OLED display; 11. Emitting layer; 111. OLED pixel; 12. Color filter layer; 121. Color filter; 13. First light-shielding matrix; 131. First light-transmitting area; 14. Second light-shielding matrix; 141. Second light-transmitting area; 15. Substrate; 16. Thin-film transistor array layer; 17. Thin-film encapsulation layer; 18. Touch layer; 19. Cover plate; 20. Planarization layer; 2. Optical fingerprint recognition module; 21. Lens; 22. Optical fingerprint sensor. Detailed Implementation

[0038] The OLED display screen, optical fingerprint recognition device, and electronic device provided in this application will be explained and described in detail below with reference to the accompanying drawings.

[0039] Figure 1 This is a longitudinal cross-sectional view of the OLED display screen according to an embodiment of this application, such as... Figure 1-3 As shown, the OLED display includes a light-emitting layer 11, a color filter layer 12, a first light-shielding matrix 13, and a second light-shielding matrix 14. The light-emitting layer 11 includes a plurality of OLED pixels 111, which are separated by the first light-shielding matrix 13. The first light-shielding matrix 13 defines the area of ​​the OLED pixels 111 and is also called the pixel definition layer (PDL). The first light-shielding matrix 13 can be made of black light-absorbing material, that is, black light-absorbing material is set in the area outside the OLED pixels to avoid reflection from the metal traces below the light-emitting layer 11.

[0040] A color filter layer 12 is disposed above the light-emitting layer 11. The color filter layer 12 includes multiple color filters 121, each corresponding to an OLED pixel 111. Each color filter 121 is the same color as its corresponding OLED pixel below it; that is, the filter above a red pixel is a red filter, the filter above a green pixel is a green filter, and the filter above a blue pixel is a blue filter. The multiple color filters 121 are separated by a second light-shielding matrix 14, which can be made of black light-absorbing material. The second light-shielding matrix 14 absorbs incident light above the OLED display other than light of the same color as the OLED pixel 111.

[0041] The arrangement of the first light-blocking matrix 13 and the second light-blocking matrix 14 ensures that only light of the same color as OLED pixel 111 can pass through the OLED display 1, while other light is absorbed by the first light-blocking matrix 13 and the second light-blocking matrix 14.

[0042] OLED display 1 has a fingerprint recognition area, such as Figure 1-4 As shown, the first light-blocking matrix 13 has multiple first light-transmitting areas 131 on the area corresponding to the fingerprint recognition area, and the second light-blocking matrix 14 has multiple second light-transmitting areas 141 on the area corresponding to the fingerprint recognition area. The multiple first light-transmitting areas 131 and the multiple second light-transmitting areas 141 are configured to transmit the light used for optical fingerprint recognition from above the OLED display 1 to below the OLED display 1, that is, to transmit the light reflected from the finger above the OLED display 1 to below the OLED display 1.

[0043] This embodiment of the application, through the arrangement of the first light-transmitting area 131 and the second light-transmitting area 141, allows light used for optical fingerprint recognition to be transmitted from above the OLED display 1 to below the OLED display 1, and received by the optical fingerprint recognition module 2 below the OLED display 1, thus realizing under-display optical fingerprint recognition and combining POL-less technology with under-display optical fingerprint recognition technology. Compared with ultrasonic fingerprint recognition technology, this application combines under-display optical fingerprint recognition technology with POL-less technology, reducing the cost of electronic devices.

[0044] In this embodiment, as Figure 1 As shown, the OLED display 1 also includes a substrate 15 disposed below the light-emitting layer 11. The substrate 15 is used to support the light-emitting layer 11 and the color filter layer 12. The substrate 15 can be a rigid substrate, in which case the material of the substrate 15 can include one or more of glass or metal foil. The substrate 15 can also be a flexible substrate, in which case the material of the substrate 15 can include one or more of polyethylene terephthalate, polyetheretherketone, polystyrene, polycarbonate, polyarylate, polyarylate, polyimide, polyvinyl chloride, polyethylene, and textile fibers.

[0045] A thin film transistor array layer 16 may be disposed between the substrate 15 and the light-emitting layer 11. A thin film encapsulation layer 17 (TFE) and a touch layer 18 may be disposed between the light-emitting layer 11 and the color filter layer 12, arranged sequentially from bottom to top. A cover plate 19 may be disposed above the color filter layer 12. The cover plate 19 may be made of glass. A planarization layer 20 may be disposed between the color filter layer 12 and the cover plate 19.

[0046] When a finger touches the upper surface of the cover plate 19, the light emitted by the OLED pixel 111 passes through the thin film encapsulation layer 17, the touch layer 18, the color filter layer 12, the second light-transmitting area 141, the planarization layer 20, and the cover plate 19 to illuminate the finger surface. The light reflected from the finger surface passes through the cover plate 19, the planarization layer 20, the color filter layer 12, the second light-transmitting area 141, the touch layer 18, the thin film encapsulation layer 17, the first light-transmitting area 131, and the substrate 15 before illuminating the optical fingerprint recognition module 2 below the OLED display 1. The optical fingerprint recognition module 2 recognizes the fingerprint of the finger based on the received light, thus realizing under-display optical fingerprint recognition.

[0047] The arrangement of the first light-transmitting area 131 and the second light-transmitting area 141 enables the optical fingerprint sensor 22 of the optical fingerprint recognition module 2 to receive sufficiently strong light, thereby making the recognition function of the optical fingerprint sensor 22 fast and stable.

[0048] In some alternative embodiments, the incident light angle θ within the OLED display 1 is ≥36°.

[0049] Since the principle of the optical fingerprint recognition module 2 is similar to that of a camera taking a picture, the lens 21 reduces the recognition field of view on the display surface to the light-sensitive area of ​​the optical fingerprint sensor 22, such as... Figure 5 The diagram shows the half-field-of-view optical path of the under-display optical fingerprint recognition module. The required incident angles at the center and edge of the fingerprint recognition area differ along the imaging optical path, with the incident angle increasing towards the edge. Here, h1 and h2 represent the distances from different points on the fingerprint recognition area to the center of the fingerprint recognition area, defined as 0mm. h1 and h2 represent different fingerprint recognition positions. θ1 is the incident angle of the light ray at a distance h1 from the center of the fingerprint recognition area, and θ2 is the incident angle of the light ray at a distance h2 from the center of the fingerprint recognition area. Because the refractive index of the material inside the display screen is greater than that of air, the angle of light rays inside the display screen is smaller than that inside the air. The table below shows the incident angles of a lens 21 at different fingerprint recognition positions in both air and on the display screen.

[0050]

[0051] The incident light angle in this embodiment refers to the angle formed between the incident direction and the perpendicular (normal) line at the interface between the two media when light propagates from one medium to another.

[0052] If the incident light angle is small, the optical fingerprint sensor 22 will only be able to acquire a small fingerprint area within its field of view, significantly impacting the optical fingerprint field of view. Figure 6a and Figure 6bThe simulated checkerboard pattern, where the side length of each black and white checkerboard square is 0.5mm, means that if the incident angle on the display is only 24°, the field of view of the optical fingerprint sensor 22 located below the POL-less display can only see a very small area in the center (e.g., Figure 6b As shown in the figure, the fingerprint recognition area is too small to be used.

[0053] Therefore, this application limits the incident light angle within the OLED display 1 to greater than or equal to 36° to ensure that the optical fingerprint has a sufficiently large recognition field of view, thereby ensuring the accuracy and reliability of optical fingerprint recognition.

[0054] The minimum boundary width of the first light-transmitting area 131 is Φ1 = N1 or Φ1 = H × tanθ. If H × tanθ is greater than 5 μm, then Φ1 = H × tanθ; if H × tanθ is less than or equal to 5 μm, then Φ1 = N1, where N1 ≥ 5 μm and N1 is a real number; the center-to-center distance between adjacent first light-transmitting areas 131 is < 62.5 μm. The minimum boundary width of the second light-transmitting area 141 is Φ2 = N2 or Φ2 = H × tanθ. If H × tanθ is greater than 5 μm, then Φ2 = H × tanθ; if H × tanθ is less than or equal to 5 μm, then Φ2 = N2, where N2 ≥ 5 μm and N2 is a real number; the center-to-center distance between adjacent second light-transmitting areas 141 is < 62.5 μm.

[0055] Where H is the distance from the bottom surface of the first shading matrix 13 to the top surface of the second shading matrix 14.

[0056] Since different OLED displays have different layer thicknesses, this limits the angle of incident light. The size of the first light-transmitting area 131 and the second light-transmitting area 141 can be deduced from the incident light angle θ in the OLED display and the distance H from the bottom surface of the first light-blocking matrix 13 to the top surface of the second light-blocking matrix 14, so that light can be transmitted to the photosensitive area of ​​the optical fingerprint recognition module 2 through the first light-transmitting area 131 and the second light-transmitting area 141, ensuring an effective fingerprint recognition area.

[0057] Since the light signal carrying the fingerprint needs to penetrate the OLED display 1 to reach the optical fingerprint recognition module 2, theoretically, the larger the first light-transmitting area 131 and the second light-transmitting area 141, the better. However, due to the limitations of the internal wiring and display effect requirements of the OLED display 1, the smaller the first light-transmitting area 131 and the second light-transmitting area 141, the better. These two requirements are contradictory, so it is necessary to determine the minimum size of the first light-transmitting area 131 and the second light-transmitting area 141 to achieve effective fingerprint recognition. The following is the simulation information of the light-transmitting area size, which is simulated according to the light-transmitting area setting cycle and size.

[0058] from Figure 7As shown, when the minimum boundary width of the light-transmitting area is 5μm, the fingerprint signal strength passing through the light-transmitting area reaches over 90, thus enabling effective fingerprint recognition. When the minimum boundary width of the light-transmitting area is 7μm, the fingerprint signal strength passing through the light-transmitting area reaches 100, and the fingerprint signal transmission strength reaches its maximum. Therefore, this application limits the minimum boundary width of the first light-transmitting area 131 and the second light-transmitting area 141 to be greater than 5μm to achieve effective under-display optical fingerprint recognition.

[0059] In this embodiment, the minimum boundary width of the light-transmitting area refers to the minimum diameter of the light-transmitting area.

[0060] Preferably, N1≥7μm and N2≥7μm to improve fingerprint recognition accuracy.

[0061] The design of the center-to-center spacing between adjacent light-transmitting areas is mainly limited by the ridge spacing of the collected fingerprints. Typically, the fingerprint ridge period is between 250um and 800um. Taking the narrowest fingerprint period of 250um as an example, one fingerprint period can be understood as the width of one valley and ridge line. The width of the valley and ridge lines of the fingerprint ridge is 125um. According to the sampling law, the fingerprint valley and ridge information needs to be collected at twice the sampling rate to obtain the fingerprint ridge information for fingerprint recognition. Therefore, this application limits the center-to-center spacing between adjacent light-transmitting areas to less than 62.5um to achieve effective and accurate fingerprint recognition.

[0062] In summary, the spacing and size of the first light-transmitting area 131 and the second light-transmitting area 141 meet the above requirements, and the incident light angle within the OLED display 1 is greater than or equal to 36°, thus supporting effective and accurate under-display optical fingerprint recognition. The parameters can be reasonably adjusted within the above range to achieve the optimal combination of display effect and fingerprint recognition effect of the OLED display 1.

[0063] Since the imaging angle requirements for the center and edge of the fingerprint recognition area are different in optical fingerprint recognition, in order to achieve better fingerprint recognition results, this application designs the size and spacing of the first light-transmitting area 131 and the second light-transmitting area 141 as follows:

[0064] Optional, such as Figure 3 As shown, the center-to-center distance d1 of adjacent first light-transmitting areas 131 gradually increases from the center to the edge of the fingerprint recognition area, allowing more light to pass through the first light-transmitting area 131 and effectively improving the fingerprint recognition effect. At this time, the minimum boundary width Φ1 of the first light-transmitting areas 131 on the first light-blocking matrix 13 can be the same or different. By designing the center-to-center distance d1 of adjacent first light-transmitting areas 131 to gradually increase from the center to the edge of the fingerprint recognition area, the minimum boundary width Φ1 of the first light-transmitting area 131 can be designed to be smaller while ensuring fingerprint recognition, thus guaranteeing the display effect of the OLED display 1.

[0065] Optionally, the minimum boundary width Φ1 of the first light-transmitting area 131 gradually increases from the center to the edge of the fingerprint recognition area. At this time, the center distance d1 of adjacent first light-transmitting areas 131 can be the same or different, so that more light can pass through the first light-transmitting area 131, which can effectively improve the fingerprint recognition effect.

[0066] Preferably, from the center to the edge of the fingerprint recognition area, the center-to-center distance d1 of adjacent first light-transmitting areas 131 gradually increases, the minimum boundary width Φ1 of the first light-transmitting area 131 gradually increases, and the light transmittance of the first light-transmitting area 131 reaches the optimal level, effectively improving the fingerprint recognition effect.

[0067] Optional, such as Figure 3 As shown, the center-to-center distance d2 of adjacent second light-transmitting areas 141 gradually increases from the center to the edge of the fingerprint recognition area, allowing more light to pass through the second light-transmitting area 141 and effectively improving the fingerprint recognition effect. At this time, the minimum boundary width Φ2 of the second light-transmitting areas 141 on the second light-shielding matrix 14 can be the same or different. By designing the center-to-center distance of adjacent second light-transmitting areas 141 to gradually increase from the center to the edge of the fingerprint recognition area, the minimum boundary width Φ2 of the second light-transmitting area 141 can be designed to be smaller while ensuring fingerprint recognition, thus guaranteeing the display effect of the OLED display 1.

[0068] Optionally, the minimum boundary width Φ2 of the second light-transmitting area 141 gradually increases from the center to the edge of the fingerprint recognition area. At this time, the center distance d2 of adjacent second light-transmitting areas 141 can be the same or different, so that more light can pass through the second light-transmitting area 141, which can effectively improve the fingerprint recognition effect.

[0069] Preferably, from the center to the edge of the fingerprint recognition area, the center-to-center distance d2 of the adjacent second light-transmitting areas 141 gradually increases, the minimum boundary width Φ2 of the second light-transmitting area 141 gradually increases, and the light transmittance of the second light-transmitting area 141 reaches the optimal level, effectively improving the fingerprint recognition effect.

[0070] The variation patterns of the center-to-center distance d1, the size variation patterns of the first light-transmitting area 131, the center-to-center distance d2, and the size variation patterns of the second light-transmitting area 141 from the center to the edge of the fingerprint recognition area can be adjusted according to the actual display effect and fingerprint recognition effect requirements of the OLED display 1. The size of the first light-transmitting area 131 on the first light-shielding matrix 13 can be the same or different, or it can vary in a certain pattern; the center-to-center distance of adjacent first light-transmitting areas 131 can be the same or different, or it can vary in a certain pattern. The size of the second light-transmitting area 141 on the second light-shielding matrix 14 can be the same or different, or it can vary in a certain pattern; the center-to-center distance of adjacent second light-transmitting areas 141 can be the same or different, or it can vary in a certain pattern. This is as long as the display effect of the OLED display 1 can be guaranteed while supporting under-display optical fingerprint recognition.

[0071] Optionally, the first light-transmitting area 131 is a light-transmitting hole opened on the first light-shielding matrix 13 or a light-transmitting material filled in the first light-shielding matrix 13. In practical applications, there is usually no air inside the OLED display screen 1. Therefore, the first light-transmitting area 131 is preferably a light-transmitting material filled in the first light-shielding matrix 13. Preferably, the light-transmitting material is a transparent material, such as glass or transparent organic material, to ensure the light transmittance.

[0072] Optionally, the second light-transmitting area 141 can be a light-transmitting hole opened on the second light-shielding matrix 14 or a light-transmitting material filled within the second light-shielding matrix 14. In practical applications, there is usually no air inside the OLED display 1. Therefore, the second light-transmitting area 141 is preferably a light-transmitting material filled within the second light-shielding matrix 14. Preferably, the light-transmitting material is a transparent material, such as glass or a transparent organic material, to ensure light transmittance.

[0073] Optionally, the first light-transmitting area 131 can be a circle, ellipse, square, rectangle, polygon, or irregular shape; the second light-transmitting area 141 can also be a circle, ellipse, square, rectangle, polygon, or irregular shape. When the first light-transmitting area 131 and the second light-transmitting area 141 are circular, the minimum boundary width is the diameter of the circle; when the first light-transmitting area 131 and the second light-transmitting area 141 are elliptical, the minimum boundary width is the length of the minor axis of the ellipse; when the first light-transmitting area 131 and the second light-transmitting area 141 are square, the minimum boundary width is the side length of the square; when the first light-transmitting area 131 and the second light-transmitting area 141 are rectangular, the minimum boundary width is the width of the rectangle; when the first light-transmitting area 131 and the second light-transmitting area 141 are polygons or irregular shapes, the minimum boundary width is the length of the shortest straight line connecting two opposite points on the boundary of the shape. This application does not impose special limitations on the shape of the first light-transmitting area 131 and the second light-transmitting area 141, as long as their size meets the requirements.

[0074] This application discloses an optical fingerprint recognition device, such as Figure 8 As shown, the device includes the OLED display 1 described in the above embodiment and the optical fingerprint recognition module 2. The optical fingerprint recognition module 2 is disposed below the fingerprint recognition area of ​​the OLED display 1. The optical fingerprint recognition module 2 includes a lens 21 and an optical fingerprint sensor 22. The lens 21 is disposed below the OLED display 1 to receive fingerprint detection light formed by a finger above the OLED display 1 and returning through the OLED display 1, and to converge the fingerprint detection light to the sensing area of ​​the optical fingerprint sensor 22. The optical fingerprint sensor 22 is disposed below the lens 21 to receive the fingerprint detection light converged by the lens 21 and to perform optical imaging based on the fingerprint detection light to obtain a fingerprint image of the finger.

[0075] This application discloses an electronic device including the optical fingerprint recognition device described in the above embodiments. The electronic device can be a laptop, mobile phone, tablet computer, desktop computer, projector, gaming device, in-vehicle electronic device, wearable smart device, etc. This application, through the design of a first light-transmitting area 131 and a second light-transmitting area 141 within the OLED display screen 1, enables the POL-less display (a POL-less display refers to a display screen using POL-less technology) to support under-display optical fingerprint recognition. Fingerprint recognition is no longer limited to ultrasonic fingerprint recognition, and compared to the high cost of ultrasonic fingerprint recognition, this application effectively reduces the cost of the electronic device.

[0076] In the description of this application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application.

[0077] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise expressly limited. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0078] In the description of this specification, the references to terms such as "this embodiment," "an embodiment," "some embodiments," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in a suitable manner in any at least one embodiment or example. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of different embodiments or examples.

[0079] Furthermore, 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 technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0080] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Any modifications, equivalent substitutions, and simple improvements made to the substantive content of this application should be included within the protection scope of this application.

Claims

1. An OLED display screen, characterized in that, It includes a light-emitting layer (11), a color filter layer (12), a first light-blocking matrix (13), and a second light-blocking matrix (14). The light-emitting layer (11) includes a plurality of OLED pixels (111), which are separated by the first light-shielding matrix (13); The color filter layer (12) is disposed above the light-emitting layer (11). The color filter layer (12) includes a plurality of color filters (121), each of which corresponds one-to-one with an OLED pixel (111). Each color filter (121) is the same color as the OLED pixel (111) below it. The plurality of color filters (121) are separated by the second light-shielding matrix (14). The OLED display (1) has a fingerprint recognition area. The first light-blocking matrix (13) has a plurality of first light-transmitting areas (131) on the area corresponding to the fingerprint recognition area, and the second light-blocking matrix (14) has a plurality of second light-transmitting areas (141) on the area corresponding to the fingerprint recognition area.

2. The OLED display screen according to claim 1, characterized in that, The incident light angle θ in the OLED display (1) is ≥36°. The minimum boundary width of the first light-transmitting area (131) is Φ1 = N1 or Φ1 = H × tanθ. If H × tanθ is greater than 5 μm, then Φ1 = H × tanθ; if H × tanθ is less than or equal to 5 μm, then Φ1 = N1, where N1 ≥ 5 μm; the center-to-center distance between adjacent first light-transmitting areas (131) is d1 < 62.5 μm. The minimum boundary width of the second light-transmitting area (141) is Φ2 = N2 or Φ2 = H × tanθ. If H × tanθ is greater than 5 μm, then Φ2 = H × tanθ; if H × tanθ is less than or equal to 5 μm, then Φ2 = N2, where N2 ≥ 5 μm; the center-to-center distance d2 between adjacent second light-transmitting areas (141) is < 62.5 μm. Where H is the distance from the bottom surface of the first shading matrix (13) to the top surface of the second shading matrix (14).

3. The OLED display screen according to claim 1 or 2, characterized in that, From the center to the edge of the fingerprint recognition area, the center-to-center distance d1 between adjacent first light-transmitting areas (131) gradually increases; And / or, from the center to the edge of the fingerprint recognition area, the minimum boundary width Φ1 of the first light-transmitting area (131) gradually increases.

4. The OLED display screen according to claim 1 or 2, characterized in that, From the center to the edge of the fingerprint recognition area, the center-to-center distance d2 between adjacent second light-transmitting areas (141) gradually increases; And / or, from the center to the edge of the fingerprint recognition area, the minimum boundary width Φ2 of the second light-transmitting area (141) gradually increases.

5. The OLED display screen according to claim 2, characterized in that, N1≥7μm, and / or, N2≥7μm.

6. The OLED display screen according to claim 1, characterized in that, The first light-transmitting area (131) is a light-transmitting hole opened on the first light-shielding matrix (13) or a light-transmitting material filled in the first light-shielding matrix (13); And / or, the second light-transmitting area (141) is a light-transmitting hole opened on the second light-blocking matrix (14) or a light-transmitting material filled in the second light-blocking matrix (14).

7. The OLED display screen according to claim 6, characterized in that, The light-transmitting material is a transparent material.

8. The OLED display screen according to claim 1, characterized in that, The first light-transmitting area (131) is circular, elliptical, square, rectangular, polygonal or irregular in shape; and / or, the second light-transmitting area (141) is circular, elliptical, square, rectangular, polygonal or irregular in shape.

9. An optical fingerprint recognition device, characterized in that, Including the OLED display (1) and optical fingerprint recognition module (2) as described in any one of claims 1-8, The optical fingerprint recognition module (2) is disposed below the fingerprint recognition area of ​​the OLED display screen (1).

10. An electronic device, characterized in that, Includes the optical fingerprint recognition device as described in claim 9.

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