CN212341879U - OLED display screen and fingerprint identification module - Google Patents
OLED display screen and fingerprint identification module Download PDFInfo
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- CN212341879U CN212341879U CN202020669687.9U CN202020669687U CN212341879U CN 212341879 U CN212341879 U CN 212341879U CN 202020669687 U CN202020669687 U CN 202020669687U CN 212341879 U CN212341879 U CN 212341879U
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Abstract
The utility model provides a OLED display screen and fingerprint identification module. The OLED display screen comprises a light-emitting layer, an encapsulation layer, a touch layer and a black matrix, wherein the encapsulation layer is arranged above the light-emitting layer; the touch layer is positioned above the packaging layer and comprises 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 in an area which is above the touch layer and corresponds to the touch driving electrode and the touch sensing electrode; a plurality of light-transmitting areas are arranged on the touch driving electrode and/or the touch sensing electrode; and the area of each layer except the touch layer on the OLED display screen, which corresponds to the light-transmitting area on the touch layer, is a light-transmitting area. The utility model provides an above-mentioned OLED display screen and fingerprint identification module to sheltering from touch-control drive electrode and touch-control response electrode with the black matrix and form the OLED display screen of interference in order to avoid external light reflection, realize fingerprint identification under the screen.
Description
Technical Field
The utility model belongs to the technical field of fingerprint identification and demonstration and specifically relates to a OLED display screen is related to and fingerprint identification module including this OLED display screen.
Background
The OLED display generally includes a substrate, an anode, a cathode, an organic light emitting layer, an electron transport layer, and a hole transport layer, which have many advantages and increasingly wider application range than LCD displays. With the development of the technology, the existing OLED display screen is generally integrated with a touch circuit and other structures inside, so that the OLED touch display screen is formed.
The OLED display generally needs to be provided with a polarizer to reduce reflection of external light after the external light is incident on some metal electrode materials in the OLED display. However, the polarizer may also filter the light emitted from the OLED display, thereby affecting the brightness of the OLED display.
To solve the problem, a novel OLED display screen has appeared at present, which does not have a polarizer, and is arranged in an area corresponding to metal electrode materials in the OLED display screen by adding a black matrix in the OLED display screen, so as to prevent external light from irradiating the metal electrode materials to cause reflection. However, for the novel OLED display screen, due to the addition of the black matrix and other structures, the light-transmitting area of the OLED display screen can be reduced, and the light-transmitting area can be changed into a light-transmitting-incapable area, so that the realization of the fingerprint function under the optical screen can be influenced.
SUMMERY OF THE UTILITY MODEL
A first object of the utility model is to provide an OLED display screen, it can improve above-mentioned current OLED display screen because black matrix structure influences the technical problem of the realization of fingerprint function under the optical screen.
The utility model provides an OLED display screen includes the luminescent layer and sets up the encapsulation layer above the luminescent layer, OLED display screen still includes touch-control layer and black matrix, the touch-control layer is located the top of encapsulation layer, and the touch-control layer includes a plurality of touch-control drive electrodes that set up along the first direction and a plurality of touch-control induction electrodes that set up along the second direction; the black matrix is arranged in an area which is above the touch layer and corresponds to the touch driving electrode and the touch sensing electrode; the OLED display screen is provided with a fingerprint identification functional area, and a plurality of light transmitting areas are arranged on the touch driving electrode and/or the touch sensing electrode in an area of the touch layer corresponding to the fingerprint identification functional area; and the area of each layer except the touch layer on the OLED display screen, which corresponds to the light-transmitting area on the touch layer, is a light-transmitting area.
Optionally, the touch driving electrode includes 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 areas; the touch sensing electrode comprises a plurality of first inductor electrodes arranged along a fifth direction and a plurality of second inductor electrodes arranged along a sixth direction, the first inductor electrodes and the second inductor electrodes are connected to form a grid structure, and grid openings in the grid structure correspond to the pixel display area.
Optionally, 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 inductor sub-electrode and the second inductor sub-electrode.
Optionally, the light-transmitting area is an opening, and the first driving sub-electrode, the second driving sub-electrode, the first inductor electrode and the second inductor 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 inductor sub-electrode and the second inductor sub-electrode provided with the opening maintain signal transmissibility at the opening.
Optionally, the number of the light-transmitting areas arranged on the first driving sub-electrode, the second driving sub-electrode, the first inductor electrode and the second inductor electrode provided with the light-transmitting areas is multiple.
Optionally, the widths of the touch driving electrodes and the touch sensing electrodes are 4-6 mm.
Optionally, the aperture of the light-transmitting area on the touch driving electrode and/or the touch sensing electrode is 3-15 micrometers.
Optionally, a color film layer is further disposed above the touch layer, and a position of the color film layer corresponding to the light-emitting pixels on the light-emitting layer is a color filter having the same color as the light-emitting pixels.
Optionally, a color film layer is arranged between the touch layer and the packaging layer, and a position of the color film layer corresponding to the light-emitting pixels on the light-emitting layer is a color filter having the same color as the light-emitting pixels.
Optionally, in other layers except the touch layer of the OLED display screen, a region corresponding to the light-transmitting region on the touch layer is provided with a black matrix including the light-transmitting region, and a lead layer and an anode layer on the BP substrate.
A second object of the utility model is to provide a fingerprint identification module, it includes foretell OLED display screen and screen fingerprint device down, fingerprint device sets up under the screen the below of OLED display screen.
Optionally, the under-screen fingerprint device includes a microlens layer, a light-transmitting hole structure and a photosensitive sensing array, which are sequentially arranged; the light hole structure is provided with at least one first light shielding layer, a plurality of first light holes are formed in each first light shielding layer, and each first light hole corresponds to one micro lens on the micro lens layer.
Optionally, a second light shielding layer is disposed between the light hole structure and the photosensitive sensor array, and the second light shielding layer has a light transmitting region and a light shielding region, and the light shielding region is disposed in a non-imaging region of the photosensitive sensor array.
Optionally, a projection of the first light hole on the second light shielding layer is located in the light-transmitting area of the second light shielding layer.
Optionally, the photosensitive sensing array has a plurality of photosensitive units in an area corresponding to each first light-transmitting hole, and the plurality of photosensitive units are configured to receive light emitted from the microlens to the photosensitive sensing array through the first light-transmitting hole.
Optionally, the second light shielding layer is made of a black light absorbing material.
Optionally, the light hole structure includes a first light shielding layer, a first transparent insulating layer disposed between the first light shielding layer and the photosensitive sensor array, and a second transparent insulating layer disposed between the first light shielding layer and the microlens layer.
Optionally, the light hole structure further includes an infrared filter layer, and the infrared filter layer is disposed between the first light shielding layer and the photosensitive sensor array, or disposed between the first light shielding layer and the microlens layer.
The utility model discloses following beneficial effect has:
the utility model provides an OLED display screen, it sets up the light-transmitting area on the touch-control drive electrode and/or the touch-control induction electrode on the touch-control layer to and on other each layers except touch-control layer of OLED display screen, for example on the black matrix, with the touch-control layer the position that the light-transmitting area corresponds forms the light-transmitting area, thereby make and form a plurality of hole structures that can pass through on the OLED display screen, these light-transmitting hole structures can be used for the light transmission of optics fingerprint identification to OLED display screen below from OLED display screen top, be located the screen below the OLED display screen finger print device and receive, be used for carrying out screen finger print identification; namely, for the OLED display screen which uses the black matrix to shield the touch driving electrode and the touch sensing electrode so as to avoid interference caused by external light reflection, the fingerprint identification under the screen is realized.
The utility model provides a fingerprint identification module, it includes above-mentioned OLED display screen, has with above-mentioned same technological effect, promptly, to sheltering from touch-control drive electrode and touch-control response electrode with black matrix in order to avoid external light reflection to form the OLED display screen of interference, realizes fingerprint identification under the screen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of an OLED display screen according to embodiment 1 of the present invention;
FIG. 2 is a schematic structural diagram of a touch layer in the OLED display screen shown in FIG. 1;
fig. 3 is a schematic structural diagram of an intersection of a touch driving electrode and a touch sensing electrode in the touch layer shown in fig. 2;
FIG. 4 is a schematic view of light passing through the OLED display screen of FIG. 1 for underscreen fingerprint identification;
fig. 5 is a schematic structural diagram of a touch electrode in embodiment 1;
FIG. 6 is a diagram of a modified structure of a touch electrode;
FIG. 7 is a diagram illustrating a second variation of a touch electrode;
FIG. 8 is a diagram illustrating a third modified structure of a touch electrode;
FIG. 9 is a diagram illustrating a fourth modified structure of a touch electrode;
fig. 10 is a schematic diagram of a fifth modified structure of a touch electrode;
fig. 11 is a schematic structural diagram of an OLED display panel according to embodiment 4 of the present invention;
fig. 12 is a schematic structural diagram of the fingerprint recognition module of the present invention.
Detailed Description
The embodiments of the technical solutions provided in the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are not all embodiments of the technical solutions provided in the present invention. All other embodiments, which can be derived by a person skilled in the art from the following description without inventive step, are intended to be within the scope of the invention as claimed.
The utility model provides a fingerprint device under screen, in its embodiment, as shown in fig. 1-11, the OLED display screen includes luminescent layer 10 and the encapsulation layer 11 of setting above the luminescent layer to and, still include touch-control layer 12 and black matrix 13, touch-control layer 12 is located the top of encapsulation layer 11, and touch-control layer 12 includes a plurality of touch-control drive electrodes 120a that set up along the first direction and a plurality of touch-control induction electrodes 120b that set up along the second direction; the black matrix 13 is disposed above the touch layer 12 and in an area corresponding to the touch driving electrode 120a and the touch sensing electrode 120 b. The OLED display screen is provided with a fingerprint identification functional area, and a plurality of light transmission areas 121 are arranged on the touch driving electrode 120a and/or the touch sensing electrode 120b in the area of the touch layer 12 corresponding to the fingerprint identification functional area; the area of each layer except the touch layer 12 on the OLED display screen, which corresponds to the light-transmitting area 121 on the touch layer 12, is a light-transmitting area.
Specifically, in each layer other than the touch layer 12 on the OLED display screen, the region corresponding to the light-transmitting region 121 on the touch layer 12 is provided with the black matrix 13 including the light-transmitting region, and the lead layer and the anode layer on the BP substrate.
In the present embodiment, the black matrix 13 is disposed above the touch layer 12 of the OLED display to block the external light, so as to prevent the external light from irradiating the touch driving electrode 120a and the touch sensing electrode 120b of the touch layer 12 to form reflection, which affects the display effect of the OLED display. Therefore, the polaroid can be omitted, the polaroid is prevented from absorbing light emitted by the OLED display screen, and the brightness displayed by the OLED display screen can be improved.
Moreover, the light-transmitting area 121 is disposed on the touch layer 12, and a light-transmitting area is formed at a position corresponding to the light-transmitting area 121 of the touch layer 12 on other layers of the OLED display screen except the touch layer 12, for example, on the black matrix 13, so that a plurality of light-transmitting hole structures are formed on the OLED display screen, and the light for optical fingerprint identification can be transmitted from above the OLED display screen (generally emitted by the OLED display screen and reflected by a finger on the OLED display screen) to below the OLED display screen and received by an under-screen fingerprint device below the OLED display screen for under-screen fingerprint identification.
Example 1 of (I) OLED display Panel
In example 1 of the OLED display panel, as shown in fig. 1 to 5, the OLED display panel includes a substrate 14, a protective back film 15 is formed below the substrate 14 (with reference to the vertical direction in fig. 1), structures including an anode, a cathode, metal traces, a semiconductor layer, and the like are formed above the substrate 14, a light emitting layer 10 is formed above the substrate, and an encapsulation layer 11 is formed above the light emitting layer 10.
A touch layer 12 is prepared on the encapsulation layer 11, and as shown in fig. 2, the touch layer 12 includes a plurality of touch driving electrodes 120a arranged along a first direction and a plurality of touch sensing electrodes 120b arranged along a second direction.
A bridging structure is generally provided at the intersection of the touch driving electrode 120a disposed along the first direction and the touch sensing electrode 120b disposed along the second direction. As shown in fig. 3, the touch sensing electrodes 120b are directly connected on a plane, and the touch driving electrodes 120a are disconnected on the plane, so that a bridging structure is disposed at the crossing position to connect the upper and lower touch driving electrodes 120 a.
As shown in fig. 5, 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 of the grid structure correspond to the pixel display areas.
The touch sensing electrode 120b includes a plurality of first sensor sub-electrodes arranged along a fifth direction and a plurality of second sensor sub-electrodes arranged along a sixth direction, the first sensor sub-electrodes and the second sensor sub-electrodes are connected to form a grid structure, and the grid openings of the grid structure correspond to the pixel display area. It is understood that the touch sensing electrode 120b has a similar structure to the touch driving electrode 120a, and therefore, is not shown in the separate drawings.
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 the first direction and the second direction are indicated 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.
As shown in fig. 5, among the respective first driving sub-electrodes 120a1 arranged along the third direction (i.e. the first direction, hereinafter referred to as the first direction), some of the first driving sub-electrodes 120a1 are provided with the light-transmitting regions 121; and the light-transmitting regions 121 are not disposed on the respective second driving sub-electrodes 120a2 disposed along the fourth direction (i.e., the second direction, hereinafter referred to as the second direction).
In fig. 5 and other subsequent figures, the light-transmitting region 121 is indicated by a circle, and the diameter of the circle is larger than the width of the first driving sub-electrode 120a1 (and also larger than the width of the second driving sub-electrode 120a 2), but the illustration is only schematic. In practice, for the light-transmitting region 121, it may be in the form of an opening, i.e., at the circle in the figure, the first driving sub-electrode 120a1 is disconnected; the shape of the break may be an arc as shown in the figure, a straight shape, or other shapes. Alternatively, the light-transmitting region 121 may be in the form of an opening, that is, at a circle in the figure, an opening is formed on the first driving sub-electrode 120a1, but the size of the opening in the width direction of the first driving sub-electrode 120a1 is smaller than the width of the first driving sub-electrode 120a1, so that the opening is completely surrounded by the first driving sub-electrode 120a1, that is, the transmission of signals can be maintained at the opening; and as for the shape of the opening, it may be a circular hole, a square hole, or other various shapes.
The light-transmitting regions provided 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 have the same or similar opening or hole structure as described above.
In addition to the above-mentioned opening or hole structure, the light-transmitting area 121 on the touch layer 12 and the light-transmitting area of each layer other than the touch layer 12 may also be made of light-transmitting materials. The light-transmitting material can 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 in the preparation process of the OLED display screen; or may be a light-transmitting material separately formed in the corresponding regions on the touch layer 12 and other layers.
In the layer structure formed of a light-transmitting material such as a transparent insulating layer in each layer other than the touch layer 12, it is generally not necessary to provide an opening or a hole because of its light-transmitting property. Specifically, as for the light-transmitting material, general transparent and translucent materials may be included, that is, as for the light-transmitting property of the light-transmitting material, as long as the intensity of light transmitted from the layer structure formed of the light-transmitting material can satisfy the requirement for successful fingerprint recognition, the light transmittance thereof is not required to be particularly high. Of course, in the case where other conditions are satisfied, the higher the light transmittance of the light-transmitting material forming the layer structure, the better; however, for example, the cathode of the OLED display panel may have a light transmittance of 50%, or slightly less than 50%.
When carrying out fingerprint identification under the screen, light meets the finger in the fingerprint identification region of screen, is reflected, shoots downwards from the top, as shown in fig. 4 the arrow from top to bottom in, from on the OLED display screen printing area 121, and on other each layer with printing area 121 corresponds the region passes through, arrives the screen below, is received by fingerprint device under the screen for carry out fingerprint identification.
In this embodiment, the size of the light-transmitting area 121 is 3 to 15 micrometers, and the normal display effect of the OLED display screen is not affected in this small size range.
And, on the first driving sub-electrode 120a1 where the light transmission regions 121 are disposed, the number of the light transmission regions 121 disposed is plural. Specifically, in the under-screen fingerprint identification area of the OLED display screen, the light transmission area 121 may be disposed in an area of the first driving sub-electrode 120a1 corresponding to each row of light-emitting pixels. This arrangement makes it possible to increase the number of the light-transmitting areas 121 provided, with the number of the first driving sub-electrodes 120a1 provided with the light-transmitting areas 121 fixed, thereby increasing the amount of light entering for the underscreen fingerprint and achieving a better underscreen fingerprint recognition effect.
In the present embodiment, each of the first driving sub-electrodes 120a1 disposed along the first direction and provided with the light-transmitting region 121 is disposed at an interval with the other first driving sub-electrodes 120a1 provided with the light-transmitting region 121, specifically, at an interval of two first driving sub-electrodes 120a 1. In this case, the density of the first driving sub-electrodes 120a1 provided with the light-transmitting regions 121 is not so dense as to affect the touch-related operation, but not so sparse as to affect the amount of light entering for the underscreen fingerprint recognition.
In this embodiment, a color film layer 16 is further disposed above the touch layer 12, and a position of the color film layer 16 corresponding to a light-emitting pixel on the light-emitting layer 10 is a color filter having the same color as the light-emitting pixel. The arrangement can avoid that the display brightness of the OLED display screen is not greatly reduced due to the structures of the black matrix 13, the touch driving electrode 120a, the touch sensing electrode 120b and the like to a certain extent.
It can be understood that although the first driving sub-electrode 120a1 provided with the light-transmitting area 121 is disconnected by the light-transmitting area 121, and the portion of the first driving sub-electrode 120a1 cannot participate in the recognition of the touch action, 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, has a large width, generally 4 to 6 mm, and is much larger than the aperture of the light-transmitting area 121, so that the touch operation performed on the OLED display screen by the user is not substantially affected when the portion of the first driving sub-electrode 120a1 does not participate in the recognition of the touch action.
(II) modified embodiment of embodiment 1
On the basis of the above embodiment 1, as a modification, 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. For example, as shown in fig. 6, the first driving sub-electrode 120a1 from the second and third left is provided with the light-transmissive region 121, the first driving sub-electrode 120a1 from the second and third right is also provided with the light-transmissive region 121, and three first driving sub-electrodes 120a1 are spaced between the two portions of the first driving sub-electrode 120a 1.
Example 2 of (tri) OLED display Panel
In embodiment 2 of the OLED display panel, unlike embodiment 1, in the present embodiment, the light-transmitting regions 121 are not disposed on the first driving sub-electrodes 120a1 disposed along the first direction among the touch driving electrodes 120a, and the light-transmitting regions 121 are disposed on the plurality of second driving sub-electrodes 120a2 disposed along the second direction. As shown in fig. 7, the light transmission regions 121 are disposed on the second top and second bottom driving sub-electrodes 120a 2.
Similarly to embodiment 1, in the touch driving electrodes 120a arranged along the second direction, two or more adjacent second driving sub-electrodes 120a2 may be provided with the light-transmitting area 121. For example, as shown in fig. 8, the light-transmitting region 121 is disposed on the second and third top driving sub-electrodes 120a2, the light-transmitting region 121 is disposed on the second and third bottom driving sub-electrodes 120a2, and 3 second driving sub-electrodes 120a2 are spaced between the two second driving sub-electrodes 120a 2.
Other parts of this embodiment that are not described are the same as those of embodiment 1, and are not described again here.
Example 3 of (tetra) OLED display Panel
In embodiment 3 of the OLED display panel, unlike embodiments 1 and 2, the light-transmitting regions are disposed on both the first driving sub-electrode 120a1 disposed along the first direction and the second driving sub-electrode 120a2 disposed along the second direction in the touch driving electrode 120 a. 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 regions 121 may be one or more than two; among the plurality of second driving sub-electrodes 120a2 arranged in the second direction, the number of the second driving sub-electrodes 120a2 provided with the light-transmitting regions 121 may be one or more than two, for example, as in the structure shown in fig. 9 and 10. Specifically, the specific reference to embodiment 1 is to the arrangement of the light-transmitting areas 121 in the first driving sub-electrodes 120a1 arranged along the first direction, and the specific reference to embodiment 2 is to the arrangement of the light-transmitting areas 121 in the second driving sub-electrodes 120a2 arranged along the second direction, which are not repeated herein.
(V) example 4 of OLED display Panel
In embodiment 4 of the OLED display screen, unlike the above embodiments in which the light-transmitting area 121 is only disposed on the touch driving electrode 120a, in the present embodiment, the light-transmitting area 121 is disposed on the touch sensing electrode 120 b. Specifically, three situations can be divided into three situations, in which the light-transmitting area 121 is disposed on the first sensor electrode, the light-transmitting area 121 is disposed on the second sensor electrode, and the light-transmitting area 121 is disposed on the first sensor electrode and the second sensor electrode, which are similar to the above-mentioned embodiment 1, embodiment 2, and embodiment 3, respectively, and are not described herein again.
Example 5 of (six) OLED display Panel
In embodiment 5 of the OLED display screen, unlike embodiments 1 to 3 and 4, in this embodiment, the light-transmitting regions 121 are disposed on both the touch driving electrode 120a and the touch sensing electrode 120b, where the case of disposing the light-transmitting regions 121 on the touch driving electrode 120a is the same as embodiments 1 to 3, and the case of disposing the light-transmitting regions 121 on the driving sensing electrode 120b is the same as embodiment 4, and therefore, no further description is given here.
Example 6 of (seven) OLED display Panel
In embodiment 6 of the OLED display screen, unlike the above embodiments, the touch layer 12 is not prepared on the encapsulation layer 11, but a color film layer 16 is disposed between the touch layer 12 and the encapsulation layer 11, as shown in fig. 11, and the position of the color film layer 16 corresponding to the light-emitting pixel on the light-emitting layer 10 is a color filter having the same color as the light-emitting pixel. Specifically, a buffer layer 17 may be first prepared on the color film layer 16, and the touch layer 12 may be prepared on the buffer layer 17.
To sum up, the OLED display screen provided in the above embodiments of the present invention sets the light-transmitting area 121 on the touch driving electrode 120a and/or the touch sensing electrode 120b, and on other layers of the OLED display screen except the touch layer 12, such as the black matrix 13, the light-transmitting area is formed at a position corresponding to the light-transmitting area 121 on the touch layer 12, so that a plurality of hole structures capable of transmitting light are formed on the OLED display screen, and the light for optical fingerprint identification can be transmitted from above the OLED display screen to below the OLED display screen by the light-transmitting hole structures, and is received by the under-screen fingerprint device below the OLED display screen for under-screen fingerprint identification; that is, for the OLED display screen using the black matrix 13 to shield the touch driving electrode 120a and the touch sensing electrode 120b to avoid interference caused by external light reflection, the fingerprint recognition under the screen is realized.
The utility model provides a fingerprint identification module, in its embodiment, as shown in FIG. 12, the fingerprint identification module includes OLED display screen 1 in the above-mentioned embodiment to and fingerprint device 2 under the screen, fingerprint device 2 sets up in OLED display screen 1's below under the screen, receives the light that can the non-light tight pore structure see through from OLED display screen 1, carries out fingerprint identification.
Specifically, the underscreen fingerprint device 2 comprises a microlens layer 20, a light-transmitting hole structure 21 and a photosensitive sensing array 22 which are sequentially arranged. The light hole structure 21 has at least one first light-shielding layer 210, each first light-shielding layer 210 has a plurality of first light holes 211, and each first light hole 211 corresponds to one microlens 200 on the microlens layer 20; a second light shielding layer 23 is disposed between the light hole structure 21 and the photosensitive sensor array 22, and the second light shielding layer 23 has a light transmitting region and a light shielding region, and the light shielding region is disposed in a non-imaging region of the photosensitive sensor array.
In this embodiment, when performing fingerprint identification, the pixels in the fingerprint identification functional area of the OLED display screen 1 are lit, and the emitted light is reflected downward after encountering a finger, passes through the OLED display screen 1 via the light-transmitting area 121, continues to irradiate the under-screen fingerprint device 2, first reaches the microlens layer 20, passes through the microlenses 200 on the microlens layer 20, passes through the light-transmitting hole structure from the first light-transmitting holes 211 corresponding to the microlenses 200, and is finally received by the photosensitive units of the underlying photosensitive sensor array 22 for fingerprint identification.
In the above process, the light passing through the first light hole 211 can reach the photosensitive sensing array 22 through the second light shielding layer 23, and under the condition of such setting, the light shielding region of the second light shielding layer 23 can avoid the reflection of light at the edges of the imaging regions of different microlenses 200, thereby avoiding the crosstalk of imaging and ensuring that the fingerprint information can be accurately identified.
Specifically, the projection of the first light-transmitting hole 211 on the second light-shielding layer 23 is located in the light-transmitting region of the second light-shielding layer 23. This arrangement ensures that light passing through the first light-transmitting hole 211 is not blocked by the second light-shielding layer 23, and allows more or all of the light to reach the photo-sensor array 22 and be received by the photo-sensing units.
In addition, the photosensitive sensor array 22 has a plurality of photosensitive cells in the area corresponding to each of the first light-transmitting holes 211, and the photosensitive cells are configured to receive light emitted from the micro-lens 200 to the photosensitive sensor array 22 through the first light-transmitting holes 211. The reason for this is that the light sensing units can only receive collimated light information, and the area of the light sensing units is small, and there is a possibility that the light sensing units are blocked by a display driving circuit of the OLED display, so that a one-to-many relationship is formed between the microlenses 200 and the light sensing units by corresponding a plurality of light sensing units to one first light-transmitting hole 211, that is, to one microlens 200, so that more light sensing units can receive light information for fingerprint identification.
In this embodiment, the second light-shielding layer 23 is made of a black light-absorbing material to ensure that the light-shielding region of the second light-shielding layer 23 has good light-shielding performance. The black light absorption material is specifically organic resin or inorganic light absorption material.
In the present embodiment, the number of the first light shielding layers 210 in the light-transmissive hole structure 21 is one, and the light-transmissive 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. And the light hole structure further comprises an infrared filter layer 214, the infrared filter layer 214 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 the infrared filter layer 214 is used for filtering infrared light. Generally, a photosensitive sensor array performs fingerprint identification by receiving light in different wavelength bands, including visible light bands and sometimes infrared light bands; in the area of the photosensitive sensor array corresponding to the photosensitive unit receiving the visible light band, the infrared filter layer 214 filters out infrared light that may be included in the light emitted to the part of the photosensitive unit, and in the area of the photosensitive sensor array corresponding to the photosensitive unit receiving the infrared light band, the infrared filter layer 214 is provided with an opening for allowing the infrared light emitted to the part of the photosensitive unit to pass through.
The utility model provides a fingerprint identification module, it includes the OLED display screen in above-mentioned each embodiment, has the same technological effect with above-mentioned each embodiment, promptly, to sheltering from touch-control drive electrode and touch-control response electrode with black matrix and form the OLED display screen of interference in order to avoid external light reflection, realizes the fingerprint identification under the screen.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.
Claims (18)
1. The OLED display screen comprises a light emitting layer and an encapsulation layer arranged above the light emitting layer, and is characterized by further comprising a touch layer and a black matrix;
the touch layer is positioned above the packaging layer and comprises 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 in an area which is above the touch layer and corresponds to the touch driving electrode and the touch sensing electrode;
the OLED display screen is provided with a fingerprint identification functional area, and a plurality of light transmitting areas are arranged on the touch driving electrode and/or the touch sensing electrode in an area of the touch layer corresponding to the fingerprint identification functional area;
and the area of each layer except the touch layer on the OLED display screen, which corresponds to the light-transmitting area on the touch layer, is a light-transmitting area.
2. The OLED display screen of claim 1, wherein the touch driving electrodes comprise 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 cells on the grid structure correspond to the pixel display areas;
the touch sensing electrode comprises a plurality of first inductor electrodes arranged along a fifth direction and a plurality of second inductor electrodes arranged along a sixth direction, the first inductor electrodes and the second inductor electrodes are connected to form a grid structure, and grid openings in the grid structure correspond to the pixel display area.
3. The OLED display screen of claim 2, wherein 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 sensor sub-electrode and the second sensor sub-electrode.
4. The OLED display screen of claim 3, wherein the light-transmitting area is an opening, and the first driving sub-electrode, the second driving sub-electrode, the first inductor electrode and the second inductor electrode provided with the opening are disconnected at the opening; or
The light-transmitting area is an opening, and a first driving sub-electrode, a second driving sub-electrode, a first inductor sub-electrode and a second inductor sub-electrode which are provided with the opening are capable of transmitting a maintaining signal at the opening.
5. The OLED display screen of claim 3, wherein the number of the light-transmitting areas arranged on the first driving sub-electrode, the second driving sub-electrode, the first inductor electrode and the second inductor electrode provided with the light-transmitting areas is multiple.
6. The OLED display screen of claim 1, wherein the width of the touch driving electrodes and the touch sensing electrodes is 4-6 mm.
7. The OLED display screen according to any one of claims 1 to 6, wherein the aperture of the light-transmitting area on the touch driving electrode and/or the touch sensing electrode is 3 to 15 μm.
8. The OLED display screen of claim 1, wherein a color film layer is further disposed above the touch layer, and a color filter having the same color as the light-emitting pixels is disposed at a position of the color film layer corresponding to the light-emitting pixels on the light-emitting layer.
9. The OLED display screen of claim 1, wherein a color film layer is disposed between the touch layer and the encapsulation layer, and a color filter having the same color as the light-emitting pixels is disposed at a position of the color film layer corresponding to the light-emitting pixels on the light-emitting layer.
10. The OLED display screen of claim 1, wherein in each layer other than the touch layer of the OLED display screen, a region corresponding to the light-transmitting region on the touch layer is provided with a black matrix including a light-transmitting region, and a lead layer and an anode layer on the BP substrate.
11. A fingerprint identification module, characterized in that, includes OLED display screen of any one of claims 1 ~ 10 and the fingerprint device under the screen, the fingerprint device is set up in the below of OLED display screen.
12. The fingerprint identification module of claim 11, wherein the underscreen fingerprint device comprises a microlens layer, a light hole structure and a photosensitive sensing array arranged in sequence;
the light hole structure is provided with at least one first light shielding layer, a plurality of first light holes are formed in each first light shielding layer, and each first light hole corresponds to one micro lens on the micro lens layer.
13. The fingerprint identification module of claim 12, wherein a second light shielding layer is disposed between the light transmissive aperture structure and the photosensitive sensor array, the second light shielding layer having a light transmissive region and a light shielded region, the light shielded region being disposed in a non-imaging region of the photosensitive sensor array.
14. The fingerprint identification module of claim 13, wherein a projection of the first light hole on the second light shielding layer is located in the light transmitting region of the second light shielding layer.
15. The fingerprint identification module of any one of claims 12-14, wherein the photosensitive sensor array has a plurality of light sensing units in an area corresponding to each of the first light-transmissive holes, the plurality of light sensing units being configured to receive light emitted from the micro-lens through the first light-transmissive holes toward the photosensitive sensor array.
16. The fingerprint identification module of claim 13 or 14, wherein the second light shielding layer is made of a black light absorbing material.
17. The fingerprint identification module of claim 12, wherein the light aperture structure comprises a first light shielding layer, a first transparent insulating layer disposed between the first light shielding layer and the photosensitive sensor array, and a second transparent insulating layer disposed between the first light shielding layer and the microlens layer.
18. The fingerprint identification module of claim 12 or 17, wherein the light hole structure further comprises an infrared filter layer, and the infrared filter layer is disposed between the first light shielding layer and the photosensitive sensor array or between the first light shielding layer and the microlens layer.
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| CN202020669687.9U CN212341879U (en) | 2020-04-27 | 2020-04-27 | OLED display screen and fingerprint identification module |
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| CN202020669687.9U CN212341879U (en) | 2020-04-27 | 2020-04-27 | OLED display screen and fingerprint identification module |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188226A1 (en) * | 2021-03-11 | 2022-09-15 | 武汉华星光电半导体显示技术有限公司 | Organic light-emitting display panel and display device |
| WO2024040492A1 (en) * | 2022-08-25 | 2024-02-29 | 京东方科技集团股份有限公司 | Optical sensor device and display apparatus |
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2020
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022188226A1 (en) * | 2021-03-11 | 2022-09-15 | 武汉华星光电半导体显示技术有限公司 | Organic light-emitting display panel and display device |
| WO2024040492A1 (en) * | 2022-08-25 | 2024-02-29 | 京东方科技集团股份有限公司 | Optical sensor device and display apparatus |
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