OLED display and fingerprint recognition module

Abstract

The present invention provides an OLED display screen and a fingerprint recognition module. The OLED display screen includes a light-emitting layer and an encapsulation layer arranged above the light-emitting layer, as well as a touch layer and a black matrix; the touch layer is located above the encapsulation layer, and the touch layer includes a plurality of touch drive electrodes arranged along a first direction and a plurality of touch sensing electrodes arranged along a second direction; the black matrix is ​​arranged above the touch layer and in an area corresponding to the touch drive electrodes and the touch sensing electrodes; a plurality of light-transmitting areas are arranged on the touch drive electrodes and / or the touch sensing electrodes; the areas of other layers other than the touch layer on the OLED display screen corresponding to the light-transmitting areas on the touch layer are light-transmitting areas. The above-mentioned OLED display screen and fingerprint recognition module provided by the present invention realize under-screen fingerprint recognition for an OLED display screen that uses a black matrix to shield the touch drive electrodes and the touch sensing electrodes to avoid interference caused by external light reflection.

Description

Technical Field

[0001] The present invention relates to the field of fingerprint identification and display, and in particular to an OLED display screen and a fingerprint identification module comprising the OLED display screen. Background Art

[0002] OLED displays generally include structures such as a substrate, an anode, a cathode, an organic light-emitting layer, an electron transport layer, and a hole transport layer. Compared with LCD displays, they have many advantages and are increasingly used. With the development of technology, existing OLED displays generally also have structures such as built-in integrated touch circuits, thus forming OLED touch displays.

[0003] OLED displays are usually equipped with polarizers to reduce the reflection of external light when it enters some metal electrode materials in the OLED display. However, polarizers will also filter the light emitted by the OLED display itself, thus affecting the brightness that the OLED display can achieve.

[0004] To address this problem, a new type of OLED display has emerged that does not have a polarizer, but instead adds a black matrix in the OLED display, which is set in the area corresponding to the metal electrode material in the OLED display to prevent external light from irradiating these metal electrode materials and causing reflection. However, for this type of new OLED display, the addition of the black matrix and other structures will reduce the area of ​​the OLED display that can transmit light, and the area that was originally able to transmit light will become an area that cannot transmit light, which will affect the realization of the optical under-screen fingerprint function. Summary of the invention

[0005] The first purpose of the present invention is to provide an OLED display screen, which can improve the technical problem of the above-mentioned existing OLED display screen that the black matrix structure affects the realization of the optical under-screen fingerprint function.

[0006] The OLED display screen provided by the present invention comprises a light-emitting layer and an encapsulation layer arranged above the light-emitting layer, the OLED display screen further comprises a touch layer and a black matrix, the touch layer is located above the encapsulation layer, and the touch layer comprises a plurality of touch drive electrodes arranged along a first direction and a plurality of touch sensing electrodes arranged along a second direction; the black matrix is ​​arranged above the touch layer and in an area corresponding to the touch drive electrodes and the touch sensing electrodes; the OLED display screen has a fingerprint recognition functional area, in an area of ​​the touch layer corresponding to the fingerprint recognition functional area, a plurality of light-transmitting areas are arranged on the touch drive electrodes and / or the touch sensing electrodes; the areas of other layers other than the touch layer on the OLED display screen corresponding to the light-transmitting areas on the touch layer are light-transmitting areas.

[0007] Optionally, the touch drive electrode includes a plurality of first drive sub-electrodes arranged along a third direction and a plurality of second drive sub-electrodes arranged along a fourth direction, and the first drive sub-electrodes and the second drive sub-electrodes are connected to form a grid structure, and the grid openings on the grid structure correspond to the pixel display area; the touch sensing electrode includes a plurality of first sensing sub-electrodes arranged along a fifth direction and a plurality of second sensing sub-electrodes arranged along a sixth direction, and the first sensing sub-electrodes and the second sensing sub-electrodes are connected to form a grid structure, and the grid openings on the grid structure correspond to the pixel display area.

[0008] Optionally, the light-transmitting area on the touch-sensitive layer is arranged on any one or more of the first driving sub-electrode, the second driving sub-electrode, the first sensing sub-electrode and the second sensing sub-electrode.

[0009] Optionally, the light-transmitting area is an opening, and the first driving sub-electrode, the second driving sub-electrode, the first sensing sub-electrode and the second sensing sub-electrode provided with the opening are disconnected at the opening; or, the light-transmitting area is an opening, and the first driving sub-electrode, the second driving sub-electrode, the first sensing sub-electrode and the second sensing sub-electrode provided with the opening maintain signal transmission at the opening.

[0010] Optionally, the number of the light-transmitting areas arranged on the first driving sub-electrode, the second driving sub-electrode, the first sensing sub-electrode and the second sensing sub-electrode provided with the light-transmitting areas is plural.

[0011] Optionally, the width of the touch driving electrode and the touch sensing electrode is 4 to 6 mm.

[0012] Optionally, the aperture of the light-transmitting area on the touch driving electrode and / or the touch sensing electrode is 3 to 15 micrometers.

[0013] Optionally, a color filter layer is further disposed above the touch layer, and positions of the color filter layer corresponding to the light-emitting pixels on the light-emitting layer are color filters of the same color as the light-emitting pixels.

[0014] Optionally, a color filter layer is provided between the touch layer and the encapsulation layer, and positions of the color filter layer corresponding to the light-emitting pixels on the light-emitting layer are color filters of the same color as the light-emitting pixels.

[0015] Optionally, in the other layers except the touch layer of the OLED display screen, the area corresponding to the light-transmitting area on the touch layer is provided with a light-transmitting area including a black matrix, and a lead layer and an anode layer on the BP substrate.

[0016] A second object of the present invention is to provide a fingerprint recognition module, which includes the above-mentioned OLED display and an under-screen fingerprint device, and the under-screen fingerprint device is arranged below the OLED display.

[0017] Optionally, the under-screen fingerprint device includes a microlens layer, a light-transmitting hole structure and a photosensitive sensor array arranged in sequence; the light-transmitting hole structure has at least one first light-shielding layer, each first light-shielding layer is formed with a plurality of first light-transmitting holes, and each first light-transmitting hole corresponds to a microlens on the microlens layer.

[0018] Optionally, a second light-shielding layer is provided between the light-transmitting hole structure and the photosensitive sensor array, the second light-shielding layer has a light-transmitting area and a light-shielding area, and the light-shielding area is arranged in a non-imaging area of ​​the photosensitive sensor array.

[0019] Optionally, a projection of the first light-transmitting hole on the second light-shielding layer is located within a light-transmitting area of ​​the second light-shielding layer.

[0020] Optionally, the photosensitive sensor array has a plurality of photosensitive units in an area corresponding to each first light-transmitting hole, and the plurality of photosensitive units are used to receive light emitted from the microlens through the first light-transmitting hole toward the photosensitive sensor array.

[0021] Optionally, the material of the second light-shielding layer is a black light-absorbing material.

[0022] Optionally, the light-transmitting hole structure includes a first light-shielding layer, a first transparent insulating layer arranged between the first light-shielding layer and the photosensitive sensor array, and a second transparent insulating layer arranged between the first light-shielding layer and the microlens layer.

[0023] Optionally, the light-transmitting hole structure further includes an infrared filter layer, and the infrared filter layer is arranged between the first light-shielding layer and the photosensitive sensor array, or between the first light-shielding layer and the microlens layer.

[0024] The present invention has the following beneficial effects:

[0025] The OLED display screen provided by the present invention has the light-transmitting area arranged on the touch driving electrode and / or the touch sensing electrode of the touch layer, and has light-transmitting areas formed on other layers of the OLED display screen except the touch layer, such as the black matrix, at positions corresponding to the light-transmitting areas of the touch layer, so that a plurality of light-transmitting hole structures are formed on the OLED display screen. These light-transmitting hole structures can transmit light used for optical fingerprint recognition from above the OLED display screen to below the OLED display screen, and be received by the under-screen fingerprint device located below the OLED display screen for under-screen fingerprint recognition; that is, for an OLED display screen that uses a black matrix to shield the touch driving electrodes and the touch sensing electrodes to avoid interference caused by external light reflection, under-screen fingerprint recognition is achieved.

[0026] The fingerprint recognition module provided by the present invention includes the above-mentioned OLED display screen and has the same technical effect as above, that is, for an OLED display screen that uses a black matrix to shield the touch drive electrodes and the touch sensing electrodes to avoid interference caused by external light reflection, under-screen fingerprint recognition is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the specific implementation methods of the present invention or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0028] Figure 1 This is a schematic structural diagram of an OLED display screen according to Embodiment 1 of the present invention;

[0029] Figure 2 for Figure 1 The schematic diagram of the structure of the touch layer in the OLED display screen shown;

[0030] Figure 3 for Figure 2 A schematic diagram of the structure of the intersection of the touch driving electrode and the touch sensing electrode in the touch layer shown;

[0031] Figure 4 For light to pass through Figure 1 Schematic diagram of an OLED display screen used for under-screen fingerprint recognition;

[0032] Figure 5 is a schematic diagram of the structure of the touch electrode in Example 1;

[0033] Figure 6 A schematic diagram of a modified structure of a touch electrode;

[0034] Figure 7 is a schematic diagram of a second variant structure of a touch electrode;

[0035] Figure 8 is a schematic diagram of a third variant structure of a touch electrode;

[0036] Fig. 9 is a schematic diagram of a fourth variant structure of a touch electrode;

[0037] Fig.10 is a schematic diagram of a fifth variant structure of a touch electrode;

[0038] Fig.11 This is a schematic structural diagram of an OLED display screen according to Embodiment 4 of the present invention;

[0039] Fig.12 It is a structural schematic diagram of the fingerprint recognition module of the present invention. DETAILED DESCRIPTION

[0040] The specific implementation methods of the technical solution provided by the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the multiple specific implementation methods described are not all implementation methods of the technical solution provided by the present invention. Based on the multiple specific implementation methods described below, all other implementation methods obtained by ordinary technicians in this field without making creative work are within the scope of protection claimed by the present invention.

[0041] The present invention provides an under-screen fingerprint device, in an embodiment of the present invention, Figures 1 to 11 As shown, the OLED display screen includes a light-emitting layer 10 and an encapsulation layer 11 disposed above the light-emitting layer, and also includes a touch layer 12 and a black matrix 13. The touch layer 12 is located above the encapsulation layer 11, and the touch layer 12 includes a plurality of touch driving electrodes 120a disposed along a first direction and a plurality of touch sensing electrodes 120b disposed along a second direction; the black matrix 13 is disposed above the touch layer 12 and in an area corresponding to the touch driving electrodes 120a and the touch sensing electrodes 120b. The OLED display screen has a fingerprint recognition functional area, and a plurality of light-transmitting areas 121 are disposed on the touch driving electrodes 120a and / or the touch sensing electrodes 120b in an area corresponding to the fingerprint recognition functional area of ​​the touch layer 12; the areas of other layers other than the touch layer 12 on the OLED display screen corresponding to the light-transmitting areas 121 on the touch layer 12 are light-transmitting areas.

[0042] Specifically, among the layers other than the touch layer 12 on the OLED display screen, the area corresponding to the light-transmitting area 121 on the touch layer 12 is provided with a light-transmitting area including a black matrix 13, and a lead layer and an anode layer on the BP substrate.

[0043] In this embodiment, a black matrix 13 is disposed above the touch layer 12 of the OLED display screen to block external light, thereby preventing external light from being reflected on the touch driving electrodes 120a and the touch sensing electrodes 120b of the touch layer 12, thereby affecting the display effect of the OLED display screen. In this way, the polarizer can be omitted, and the polarizer can be prevented from absorbing the light emitted by the OLED display screen, thereby improving the brightness that the OLED display screen can display.

[0044] In addition, the light-transmitting area 121 is arranged on the touch layer 12, and light-transmitting areas are formed on other layers of the OLED display except the touch layer 12, for example, on the black matrix 13, at positions corresponding to the light-transmitting area 121 of the touch layer 12, so that a plurality of light-transmitting hole structures are formed on the OLED display. These light-transmitting hole structures can transmit light used for optical fingerprint recognition from above the OLED display (generally emitted by the OLED display and reflected by a finger on the OLED display) to below the OLED display, and be received by an under-screen fingerprint device located below the OLED display for under-screen fingerprint recognition.

[0045] (I) Example 1 of OLED display screen

[0046] In the embodiment 1 of the OLED display screen, as Figure 1 to Figure 5 As shown, the OLED display screen includes a substrate 14, below which (with Figure 1 A protective back film 15 is formed (with the up and down directions in the figure as a reference), and structures including an anode, a cathode, a metal wiring and a semiconductor layer are formed above the substrate 14, and a light-emitting layer 10 is formed above it, and an encapsulation layer 11 is formed above the light-emitting layer 10.

[0047] A touch control layer 12 is prepared on the encapsulation layer 11, such as Figure 2 As shown, the touch layer 12 includes a plurality of touch driving electrodes 120 a arranged along a first direction and a plurality of touch sensing electrodes 120 b arranged along a second direction.

[0048] For the touch driving electrodes 120a arranged along the first direction and the touch sensing electrodes 120b arranged along the second direction, a bridge structure is generally arranged at the intersection of the two. Figure 3 As shown, the touch sensing electrodes 120b are directly connected on the plane, while the touch driving electrodes 120a are disconnected on the plane. Therefore, a bridge structure is provided at the intersection to connect the upper and lower parts of the touch driving electrodes 120a.

[0049] like Figure 5 As shown, the touch driving electrode 120a includes a plurality of first driving sub-electrodes 120a1 arranged along a third direction and a plurality of second driving sub-electrodes 120a2 arranged along a fourth direction, and the first driving sub-electrodes 120a1 and the second driving sub-electrodes 120a2 are connected to form a grid structure, and the grid openings on the grid structure correspond to the pixel display area.

[0050] The touch sensing electrode 120b includes a plurality of first sensing sub-electrodes arranged along a fifth direction and a plurality of second sensing sub-electrodes arranged along a sixth direction, and the first sensing sub-electrodes and the second sensing sub-electrodes are connected to form a grid structure, and the grid openings on the grid structure correspond to the pixel display area. It can be seen that the structure of the touch sensing electrode 120b is similar to that of the touch driving electrode 120a, and therefore is not shown in a separate figure.

[0051] In this embodiment, the third direction and the fifth direction are the same as the first direction, and the fourth direction and the sixth direction are the same as the second direction, so they are indicated as the first direction and the second direction in each drawing. Of course, in other embodiments of the present invention, the third direction and the fifth direction may be different from the first direction, and the fourth direction and the sixth direction may be different from the second direction.

[0052] like Figure 5 As shown, among the first driving sub-electrodes 120a1 arranged along the third direction (i.e., the first direction, hereinafter referred to as the first direction), the light-transmitting area 121 is arranged on some of the first driving sub-electrodes 120a1; while the light-transmitting area 121 is not arranged on the second driving sub-electrodes 120a2 arranged along the fourth direction (i.e., the second direction, hereinafter referred to as the second direction).

[0053] exist Figure 5 In the subsequent drawings, the light-transmitting area 121 is indicated by a circle, and the diameter of the circle is greater than the width of the first driver sub-electrode 120a1 (also greater than the width of the second driver sub-electrode 120a2), but the figure is only for illustration. In practice, the light-transmitting area 121 can be in the form of an opening, that is, at the circle in the figure, the first driver sub-electrode 120a1 is disconnected; the shape of the disconnected part can be the arc shown in the figure, or it can be a straight shape, or other shapes. Alternatively, the light-transmitting area 121 can also be in the form of an opening, that is, at the circle in the figure, an opening is provided on the first driver sub-electrode 120a1, but the size of the opening in the width direction of the first driver sub-electrode 120a1 is smaller than the width of the first driver sub-electrode 120a1, so that it is completely surrounded by the first driver sub-electrode 120a1, that is, the signal transmission can be maintained at the opening; and as for the shape of the opening, it can be a circular hole, a square hole or other various shapes.

[0054] The light-transmitting areas arranged on the layers other than the touch layer 12, such as the black matrix 13, and the lead layer and the anode layer on the BP substrate, may be the same or similar opening or hole structures as those described above.

[0055] In addition to the above-mentioned opening or hole structure, the light-transmitting area 121 on the touch layer 12 and the light-transmitting areas of other layers other than the touch layer 12 may also be light-transmitting materials. The light-transmitting material may be covered on the light-transmitting area 121 on the touch layer 12 and the light-transmitting areas on other layers when other layer structures are formed during the preparation of the OLED display screen; or may be light-transmitting materials formed separately in corresponding areas on the touch layer 12 and other layers.

[0056] In the layer structures formed by light-transmitting materials in other layers besides the touch layer 12, such as the transparent insulating layer, there is generally no need to set openings or holes, because they have light-transmitting properties. Specifically, with regard to the light-transmitting materials, general transparent and translucent materials can be included. That is to say, as for the light-transmitting properties of the light-transmitting materials, as long as the intensity of light transmitted through the layer structure formed by the light-transmitting materials can meet the needs of successful fingerprint recognition, it is not required that the transmittance reach a particularly high level. Of course, under the condition that other conditions are met, the higher the transmittance of the light-transmitting material forming the layer structure, the better; however, for example, the cathode of an OLED display screen, a transmittance of 50%, or slightly less than 50%, can also meet the needs.

[0057] When performing under-screen fingerprint recognition, light encounters the finger in the fingerprint recognition area of ​​the screen and is reflected from top to bottom. Figure 4 As shown by the arrow from top to bottom, the light passes through the light-transmitting area 121 on the OLED display screen and the areas corresponding to the light-transmitting area 121 on other layers, reaches the bottom of the screen, and is received by the under-screen fingerprint device for fingerprint recognition.

[0058] In this embodiment, the size of the light-transmitting area 121 is 3 to 15 micrometers. Within this relatively small size range, the normal display effect of the OLED display screen is not affected.

[0059] Moreover, on the first driving sub-electrode 120a1 provided with the light-transmitting area 121, the number of the light-transmitting areas 121 provided therein is plural. Specifically, in the under-screen fingerprint recognition area of ​​the OLED display screen, the light-transmitting area 121 can be provided in the area of ​​the first driving sub-electrode 120a1 corresponding to each row of light-emitting pixels. Such a setting can increase the number of the light-transmitting areas 121 provided when the number of the first driving sub-electrodes 120a1 provided with the light-transmitting areas 121 is fixed, thereby increasing the amount of light entering for the under-screen fingerprint, and obtaining a better under-screen fingerprint recognition effect.

[0060] In this embodiment, each first driving sub-electrode 120a1 provided with the light-transmitting area 121 and arranged along the first direction is arranged at intervals from other first driving sub-electrodes 120a1 provided with the light-transmitting area 121, and specifically, there are two first driving sub-electrodes 120a1 provided at intervals. In this case, the density of the first driving sub-electrodes 120a1 provided with the light-transmitting area 121 is neither too dense to affect the related operations of the touch control, nor too sparse to affect the amount of light entering for the under-screen fingerprint recognition.

[0061] In this embodiment, a color filter layer 16 is further disposed above the touch layer 12, and a color filter of the same color as the light-emitting pixel is disposed at a position of the color filter layer 16 corresponding to the light-emitting pixel on the light-emitting layer 10. This arrangement can, to a certain extent, prevent the display brightness of the OLED display screen from being greatly reduced due to structures such as the black matrix 13, the touch driving electrode 120a, and the touch sensing electrode 120b.

[0062] It can be understood that, although the first driving sub-electrode 120a1 provided with the light-transmitting area 121 will be disconnected by the light-transmitting area 121, this part of the first driving sub-electrode 120a1 cannot participate in the recognition of the touch action, but in the OLED display screen, each touch driving electrode 120a has a large number of first driving sub-electrodes 120a1 arranged along the first direction, and a large width, generally 4 to 6 mm, which is much larger than the aperture of the light-transmitting area 121. Therefore, when some of the first driving sub-electrodes 120a1 do not participate in the touch action recognition, it will not substantially affect the user's touch operation on the OLED display screen.

[0063] (II) Modified embodiment of embodiment 1

[0064] Based on the above embodiment 1, as a variation, in the touch driving electrodes 120a arranged along the first direction, two or more adjacent first driving sub-electrodes 120a1 may be provided with the light-transmitting area 121. Figure 6 As shown, the second and third first driving sub-electrodes 120a1 from the left are provided with the light-transmitting area 121, and the second and third first driving sub-electrodes 120a1 from the right are also provided with the light-transmitting area 121, and three first driving sub-electrodes 120a1 are spaced between these two parts of the first driving sub-electrodes 120a1.

[0065] (III) Example 2 of OLED display screen

[0066] In the second embodiment of the OLED display screen, different from the first embodiment, in the present embodiment, among the touch driving electrodes 120a, the first driving sub-electrodes 120a1 arranged along the first direction are not provided with the light-transmitting area 121, and the light-transmitting area 121 is provided on the plurality of second driving sub-electrodes 120a2 arranged along the second direction. Figure 7 As shown, the light-transmitting area 121 is disposed on the second second driving sub-electrode 120a2 from the top and the second second driving sub-electrode 120a2 from the bottom.

[0067] Similar to the above-mentioned embodiment 1, in the touch driving electrodes 120a arranged along the second direction, there may be more than two adjacent second driving sub-electrodes 120a2 provided with the light-transmitting area 121. Figure 8 As shown, the second and third second driving sub-electrodes 120a2 from the top are provided with the light-transmitting area 121, and the second and third second driving sub-electrodes 120a2 from the bottom are provided with the light-transmitting area 121, and three second driving sub-electrodes 120a2 are spaced between these two parts of second driving sub-electrodes 120a2.

[0068] Other undescribed aspects of this embodiment are the same as those of the above-mentioned Embodiment 1 and will not be described again.

[0069] (IV) Example 3 of OLED display screen

[0070] In the third embodiment of the OLED display screen, different from the first and second embodiments, in the present embodiment, the first driving sub-electrode 120a1 arranged along the first direction and the second driving sub-electrode 120a2 arranged along the second direction in the touch driving electrode 120a are both provided with the light-transmitting area. Among the plurality of first driving sub-electrodes 120a1 arranged along the first direction, the number of the first driving sub-electrodes 120a1 provided with the light-transmitting area 121 may be one or more than two; among the plurality of second driving sub-electrodes 120a2 arranged along the second direction, the number of the second driving sub-electrodes 120a2 provided with the light-transmitting area 121 may be one or more than two, for example Fig. 9 and Fig.10 Specifically, the arrangement of the light-transmitting area 121 in the first driving sub-electrode 120a1 arranged along the first direction is specifically referred to in Example 1, and the arrangement of the light-transmitting area 121 in the second driving sub-electrode 120a2 arranged along the second direction is specifically referred to in Example 2, which will not be repeated here.

[0071] (V) Example 4 of OLED Display Screen

[0072] In the fourth embodiment of the OLED display screen, different from the above embodiments in which the light-transmitting area 121 is only provided on the touch driving electrode 120a, in the present embodiment, the light-transmitting area 121 is provided on the touch sensing electrode 120b. Specifically, it can be divided into three cases: the light-transmitting area 121 is provided on the first sensing sub-electrode, the light-transmitting area 121 is provided on the second sensing sub-electrode, and the light-transmitting area 121 is provided on both the first sensing electrode and the second sensing electrode. These three cases are similar to the above embodiments 1, 2, and 3, respectively, and will not be described in detail here.

[0073] (VI) Example 5 of OLED display screen

[0074] In the fifth embodiment of the OLED display screen, unlike the above-mentioned first to third and fourth embodiments, in the present embodiment, the light-transmitting area 121 is provided on both the touch driving electrode 120a and the touch sensing electrode 120b, wherein the light-transmitting area 121 is provided on the touch driving electrode 120a in the same manner as in the first to third embodiments, and the light-transmitting area 121 is provided on the driving sensing electrode 120b in the same manner as in the fourth embodiment, which will not be described in detail herein.

[0075] (VII) Example 6 of OLED display screen

[0076] In the sixth embodiment of the OLED display screen, unlike the above embodiments, the touch layer 12 is not formed on the encapsulation layer 11, but a color filter layer 16 is provided between the touch layer 12 and the encapsulation layer 11. Fig.11 As shown, the position of the color filter layer 16 corresponding to the light-emitting pixel on the light-emitting layer 10 is a filter of the same color as the light-emitting pixel. Specifically, a buffer layer 17 can be first prepared on the color filter layer 16, and the touch layer 12 can be prepared on the buffer layer 17.

[0077] In summary, the OLED display screen provided by the above-mentioned embodiments of the present invention has the light-transmitting area 121 set on the touch drive electrode 120a and / or the touch sensing electrode 120b, and on the other layers of the OLED display screen except the touch layer 12, for example, on the black matrix 13, a light-transmitting area is formed at a position corresponding to the light-transmitting area 121 of the touch layer 12, so that a plurality of light-transmitting hole structures are formed on the OLED display screen. These light-transmitting hole structures can transmit light used for optical fingerprint recognition from the top of the OLED display screen to the bottom of the OLED display screen, and be received by the under-screen fingerprint device located under the OLED display screen for under-screen fingerprint recognition; that is, for the OLED display screen that uses the black matrix 13 to shield the touch drive electrode 120a and the touch sensing electrode 120b to avoid interference caused by external light reflection, under-screen fingerprint recognition is realized.

[0078] The present invention also provides a fingerprint recognition module, in its implementation mode, as Fig.12 As shown, the fingerprint recognition module includes the OLED display screen 1 in the above embodiment, and an under-screen fingerprint device 2, wherein the under-screen fingerprint device 2 is arranged below the OLED display screen 1, receives light transmitted through the light-transmitting hole structure on the OLED display screen 1, and performs fingerprint recognition.

[0079] Specifically, the under-screen fingerprint device 2 includes a microlens layer 20, a light-transmitting hole structure 21, and a photosensitive sensor array 22, which are sequentially arranged. The light-transmitting hole structure 21 has at least one first light-shielding layer 210, and each first light-shielding layer 210 is formed with a plurality of first light-transmitting holes 211, and each first light-transmitting hole 211 corresponds to a microlens 200 on the microlens layer 20; a second light-shielding layer 23 is provided between the light-transmitting hole structure 21 and the photosensitive sensor array 22, and the second light-shielding layer 23 has a light-transmitting area and a light-shielding area, and the light-shielding area is provided in the non-imaging area of ​​the photosensitive sensor array.

[0080] In this embodiment, when fingerprint recognition is performed, the pixels in the fingerprint recognition function area of ​​the OLED display screen 1 are lit, and the emitted light is reflected downward after encountering the finger, passes through the OLED display screen 1 through the light-transmitting area 121, and continues to be emitted to the under-screen fingerprint device 2. It will first reach the microlens layer 20, pass through the microlens 200 on the microlens layer 20, and pass through the through-hole structure from the first light-transmitting hole 211 corresponding to the microlens 200, and finally be received by the photosensitive unit of the photosensitive sensor array 22 below for fingerprint recognition.

[0081] In the above process, the light passing through the first light-transmitting hole 211 will also pass through the second light-shielding layer 23 before reaching the photosensitive sensor array 22. In this case, the light-shielding area of ​​the second light-shielding layer 23 can avoid reflection at the edge of the imaging area of ​​different microlenses 200, thereby avoiding crosstalk in the imaging and ensuring that the fingerprint information can be accurately identified.

[0082] Specifically, the projection of the first light-transmitting hole 211 on the second light-shielding layer 23 is located within the light-transmitting area of ​​the second light-shielding layer 23. This arrangement ensures that the light passing through the first light-transmitting hole 211 will not be blocked by the second light-shielding layer 23, allowing more light or all of the light to reach the photosensitive sensor array 22 and be received by the photosensitive unit.

[0083] In addition, the photosensitive sensor array 22 has a plurality of photosensitive units in the area corresponding to each first light-transmitting hole 211, and the plurality of photosensitive units are used to receive light emitted from the microlens 200 to the photosensitive sensor array 22 through the first light-transmitting hole 211. The reason for such a setting is that the photosensitive unit can only receive collimated light information, and the area of ​​the photosensitive unit is small, and there is a probability that the photosensitive unit is blocked by the display driving circuit of the OLED display screen. Therefore, multiple photosensitive units correspond to one first light-transmitting hole 211, that is, one microlens 200, forming a "one-to-many" relationship between the microlens 200 and the photosensitive unit, so that more photosensitive units can receive light information for fingerprint recognition.

[0084] In this embodiment, the material of the second light shielding layer 23 is a black light absorbing material to ensure that the light shielding area of ​​the second light shielding layer 23 has good light shielding performance. The black light absorbing material is specifically an organic resin or an inorganic light absorbing material.

[0085] In this embodiment, in the light-transmitting hole structure 21, the number of the first light-shielding layer 210 is one, and the light-transmitting hole structure 21 further includes a first transparent insulating layer 212 disposed between the first light-shielding layer 210 and the photosensitive sensor array 22, and a second transparent insulating layer 213 disposed between the first light-shielding layer 210 and the microlens layer 20. In addition, the light-transmitting hole structure further includes an infrared filter layer 214, which is disposed between the first light-shielding layer 210 and the photosensitive sensor array 22, or between the first light-shielding layer 210 and the microlens layer 20, and is used to filter out infrared light. Generally, the photosensitive sensor array performs fingerprint recognition by receiving light of different bands, which may include visible light bands and sometimes infrared light bands; in the area of ​​the photosensitive sensor array corresponding to the photosensitive units that receive the visible light band, the infrared filter layer 214 filters out infrared light that may be contained in the light directed to the part of the photosensitive units, and in the area of ​​the photosensitive sensor array corresponding to the photosensitive units that receive the infrared light band, the infrared filter layer 214 is provided with openings to allow infrared light directed to the part of the photosensitive units to pass through.

[0086] The fingerprint recognition module provided by the present invention includes the OLED display screen in the above-mentioned embodiments, and has the same technical effects as the above-mentioned embodiments, that is, for an OLED display screen that uses a black matrix to shield the touch drive electrodes and the touch sensing electrodes to avoid interference caused by external light reflection, under-screen fingerprint recognition is realized.

[0087] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. An OLED display screen, comprising a light-emitting layer and an encapsulation layer arranged above the light-emitting layer, characterized in that: The OLED display screen also includes a touch layer and a black matrix; The touch layer is located above the packaging layer, and the touch layer includes a plurality of touch driving electrodes arranged along a first direction and a plurality of touch sensing electrodes arranged along a second direction; The black matrix is ​​arranged above the touch layer and in an area corresponding to the touch driving electrodes and the touch sensing electrodes; The OLED display screen has a fingerprint recognition functional area, and a plurality of light-transmitting areas are arranged on the touch driving electrode and / or the touch sensing electrode in the area of ​​the touch layer corresponding to the fingerprint recognition functional area; The areas of the other layers on the OLED display screen except the touch layer corresponding to the light-transmitting area on the touch layer are light-transmitting areas; The light-transmitting area arranged on the touch driving electrode and / or the touch sensing electrode is an opening, a hole or a light-transmitting material.

2. The OLED display screen according to claim 1, characterized in that: The touch driving electrode comprises a plurality of first driving sub-electrodes arranged along a third direction and a plurality of second driving sub-electrodes arranged along a fourth direction, and the first driving sub-electrodes and the second driving sub-electrodes are connected to form a grid structure, and the grid openings on the grid structure correspond to the pixel display area; The touch sensing electrodes include a plurality of first sensing sub-electrodes arranged along a fifth direction and a plurality of second sensing sub-electrodes arranged along a sixth direction, and the first sensing sub-electrodes and the second sensing sub-electrodes are connected to form a grid structure, and the grid openings on the grid structure correspond to the pixel display area.

3. The OLED display screen according to claim 2, characterized in that: The light-transmitting area on the touch layer is disposed on any one or more of the first driving sub-electrode, the second driving sub-electrode, the first sensing sub-electrode and the second sensing sub-electrode.

4. The OLED display screen according to claim 3, characterized in that: The number of the light-transmitting areas arranged on the first driving sub-electrode, the second driving sub-electrode, the first sensing sub-electrode and the second sensing sub-electrode provided with the light-transmitting areas is plural.

5. The OLED display screen according to claim 1, characterized in that: The width of the touch driving electrode and the touch sensing electrode is 4-6 mm.

6. The OLED display screen according to any one of claims 1 to 5, characterized in that: The aperture of the light-transmitting area on the touch driving electrode and / or the touch sensing electrode is 3-15 micrometers.

7. The OLED display screen according to claim 1, characterized in that: A color filter layer is also arranged above the touch layer, and the position of the color filter layer corresponding to the light-emitting pixel on the light-emitting layer is a filter of the same color as the light-emitting pixel.

8. The OLED display screen according to claim 1, characterized in that: A color filter layer is arranged between the touch layer and the encapsulation layer, and a position of the color filter layer corresponding to the light-emitting pixel on the light-emitting layer is a filter of the same color as the light-emitting pixel.

9. The OLED display screen according to claim 1, characterized in that: In the other layers except the touch layer of the OLED display screen, the area corresponding to the light-transmitting area on the touch layer is provided with a light-transmitting area including a black matrix, and a lead layer and an anode layer on the BP substrate.

10. A fingerprint recognition module, characterized in that: It comprises the OLED display screen and the under-screen fingerprint device as described in any one of claims 1 to 9, wherein the under-screen fingerprint device is arranged below the OLED display screen.

11. The fingerprint recognition module according to claim 10, characterized in that: The under-screen fingerprint device includes a microlens layer, a light-transmitting hole structure and a photosensitive sensor array arranged in sequence; The light-transmitting hole structure has at least one first light-shielding layer, and a plurality of first light-transmitting holes are formed on each first light-shielding layer. Each first light-transmitting hole corresponds to a microlens on the microlens layer.

12. The fingerprint recognition module according to claim 11, characterized in that: A second light-shielding layer is provided between the light-transmitting hole structure and the photosensitive sensor array. The second light-shielding layer has a light-transmitting area and a light-shielding area. The light-shielding area is provided in a non-imaging area of ​​the photosensitive sensor array.

13. The fingerprint recognition module according to claim 12, characterized in that: The projection of the first light-transmitting hole on the second light-shielding layer is located in the light-transmitting area of ​​the second light-shielding layer.

14. The fingerprint recognition module according to any one of claims 11 to 13, characterized in that: The photosensitive sensor array has a plurality of photosensitive units in an area corresponding to each first light-transmitting hole. The plurality of photosensitive units are used to receive light emitted from the microlens to the photosensitive sensor array through the first light-transmitting hole.

15. The fingerprint recognition module according to claim 12 or 13, characterized in that: The material of the second light shielding layer is a black light absorbing material.

16. The fingerprint recognition module according to claim 11, characterized in that: The light-transmitting hole structure includes a first light-shielding layer, a first transparent insulating layer arranged between the first light-shielding layer and the photosensitive sensor array, and a second transparent insulating layer arranged between the first light-shielding layer and the microlens layer.

17. The fingerprint recognition module according to claim 11 or 16, characterized in that: The light-transmitting hole structure further includes an infrared filter layer, and the infrared filter layer is arranged between the first light-shielding layer and the photosensitive sensor array, or between the first light-shielding layer and the microlens layer.

Images