CN109034089B - Display device and electronic equipment - Google Patents
Display device and electronic equipment Download PDFInfo
- Publication number
- CN109034089B CN109034089B CN201810889192.4A CN201810889192A CN109034089B CN 109034089 B CN109034089 B CN 109034089B CN 201810889192 A CN201810889192 A CN 201810889192A CN 109034089 B CN109034089 B CN 109034089B
- Authority
- CN
- China
- Prior art keywords
- fingerprint identification
- display device
- identification area
- oled
- hole
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
- G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
- G06V40/12—Fingerprints or palmprints
- G06V40/13—Sensors therefor
- G06V40/1324—Sensors therefor by using geometrical optics, e.g. using prisms
-
- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
- G06V10/00—Arrangements for image or video recognition or understanding
- G06V10/10—Image acquisition
- G06V10/12—Details of acquisition arrangements; Constructional details thereof
- G06V10/14—Optical characteristics of the device performing the acquisition or on the illumination arrangements
- G06V10/145—Illumination specially adapted for pattern recognition, e.g. using gratings
-
- H—ELECTRICITY
- H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
- H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
- H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
- H10K59/40—OLEDs integrated with touch screens
Landscapes
- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Multimedia (AREA)
- Theoretical Computer Science (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
- Artificial Intelligence (AREA)
- Computer Vision & Pattern Recognition (AREA)
- Optics & Photonics (AREA)
- Human Computer Interaction (AREA)
- Image Input (AREA)
- Electroluminescent Light Sources (AREA)
Abstract
The invention discloses a display device and electronic equipment, wherein a fingerprint identification area is arranged, at least part of support columns are provided with first through holes penetrating through the support columns, an optical fingerprint sensor is arranged on the back surface of an OLED display panel, and the optical fingerprint sensor is arranged opposite to the fingerprint identification area, so that an optical signal containing fingerprint information irradiates the optical fingerprint sensor through the first through holes, the path of the optical signal incident to the optical fingerprint sensor can be controlled through the first through holes, the crosstalk problem of a light sensing unit in the optical fingerprint sensor is avoided, and the fingerprint identification precision is improved.
Description
Technical Field
The present invention relates to the field of electronic devices, and more particularly, to a display device and an electronic device.
Background
With the continuous development of science and technology, more and more electronic devices with display functions are widely applied to daily life and work of people, bring great convenience to the daily life and work of people, and become an indispensable important tool for people at present.
Electronic equipment has increasingly powerful functions, personal information stored in the electronic equipment is increasingly and more important, in order to ensure the safety of the personal information, the electronic equipment needs to have an identity recognition function, and a fingerprint recognition mode becomes a mainstream mode of identity recognition of the current electronic equipment with the advantages of high safety, convenience in use and the like.
The main component of the electronic device that implements the display function is the display panel. An OLED display panel is a commonly used display panel at present. When the fingerprint identification function is integrated in the OLED display panel, one mode is that an optical fingerprint sensor is integrated on the back surface of the OLED display panel, when fingerprint identification is carried out, a finger pressing a fingerprint identification area is irradiated by an optical signal emitted by OLED display, and the optical fingerprint sensor collects a fingerprint image through the optical signal reflected by a fingerprint.
The optical fingerprint sensor is provided with a plurality of light sensing units, and is used for collecting light signals reflected by a fingerprint area right above the area to form a fingerprint image of the area, and the light sensing units are easily interfered by reflected light signals of other areas of a finger, so that the fingerprint identification precision is poor.
Disclosure of Invention
In order to solve the above problems, the present invention provides a display device and an electronic apparatus, which can avoid the crosstalk problem of a light sensing unit in an optical fingerprint sensor and improve the accuracy of fingerprint identification.
In order to achieve the above purpose, the invention provides the following technical scheme:
a display device, the display device comprising:
the OLED display panel comprises a plurality of OLED pixels arranged in an array and a plurality of supporting columns, wherein the supporting columns are positioned between two adjacent OLED pixels, and at most one supporting column is arranged between two adjacent OLED pixels; at least part of the display area of the OLED display panel is a fingerprint identification area, and the fingerprint identification area is provided with a plurality of OLED pixels and a plurality of support columns; in the fingerprint identification area, at least part of the supporting columns are provided with first through holes penetrating through the supporting columns in the first direction;
the optical fingerprint sensor is arranged opposite to the fingerprint identification area in the first direction, an optical signal containing fingerprint information is irradiated to the optical fingerprint sensor through the first through hole, and the first direction is perpendicular to the OLED display panel.
Preferably, in the above display device, a part of the display area is the fingerprint identification area;
the other part of the display area is a non-fingerprint identification area, and support columns in the non-fingerprint identification area are of a solid structure;
the density of the support columns in the fingerprint identification area is greater than the density of the support columns in the non-fingerprint identification area.
Preferably, in the display device, one support column is disposed between any two adjacent OLED pixels in the fingerprint identification area.
Preferably, in the display device, the OLED display panel has an array substrate, and the OLED pixels are located on a side of the array substrate facing away from the optical fingerprint sensor;
the array substrate is provided with a transparent substrate, and a TFT (thin film transistor) element is arranged on one side of the transparent substrate, which is far away from the optical fingerprint sensor;
a planarization layer is arranged on one side, away from the transparent substrate, of the TFT element;
a pixel defining layer is arranged on one side, away from the TFT element, of the planarization layer, the pixel defining layer is provided with a plurality of opening areas corresponding to the OLED pixels one by one, and the opening areas are used for arranging the OLED pixels;
in the first direction, a second through hole is arranged in a region of the pixel definition layer corresponding to the first through hole, and/or a third through hole is arranged in a region of the planarization layer corresponding to the first through hole.
Preferably, in the above display device, the first through hole is a square hole or a circular hole.
Preferably, in the display device, the supporting column is a cylinder, a prism, or a truncated cone;
wherein a surface of the truncated cone facing the optical fingerprint sensor is larger than a surface thereof facing away from the optical fingerprint sensor.
Preferably, in the above display device, the optical fingerprint sensor has a plurality of light sensing units;
in the first direction, each light sensing unit corresponds to one first through hole.
Preferably, in the display device, one light sensing unit is correspondingly arranged between any two adjacent OLED pixels in the fingerprint identification area;
or, in the fingerprint identification area, one light sensing unit is correspondingly arranged between any two adjacent OLED pixels in the array direction;
or, in the fingerprint identification area, one light sensing unit is correspondingly arranged between any two adjacent OLED pixels in the row direction of the array.
Preferably, in the above display device, the support columns are opaque and have a reflectance of more than 80%.
Preferably, in the display device, the aperture of the first through hole ranges from 150 μm to 250 μm in a direction parallel to the OLED display panel.
The invention also provides electronic equipment which comprises the display device.
As can be seen from the above description, in the display device and the electronic apparatus provided in the technical solution of the present invention, the fingerprint identification area is provided, at least a portion of the support pillars have the first through holes penetrating through the support pillars, the optical fingerprint sensor is provided on the back surface of the OLED display panel, and the optical fingerprint sensor is disposed opposite to the fingerprint identification area, so that the optical fingerprint sensor is irradiated by the optical signal including the fingerprint information through the first through holes, and the path of the optical signal incident to the optical fingerprint sensor can be controlled through the first through holes, thereby avoiding the crosstalk problem of the sensing unit in the optical fingerprint sensor, and improving the accuracy of fingerprint identification.
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 description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
FIG. 1 is a schematic diagram of a display device integrated with an optical fingerprint sensor;
fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention;
fig. 3 is a top view of an OLED pixel and a supporting pillar of a display device according to an embodiment of the invention;
fig. 4 is a schematic structural diagram of another display device according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of another display device according to an embodiment of the present invention;
fig. 6 is a schematic structural diagram of another array substrate according to an embodiment of the present invention;
fig. 7 is a schematic diagram illustrating an operation principle of a driving circuit according to an embodiment of the present invention;
fig. 8 is a schematic structural diagram of an electronic device according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display device integrated with an optical fingerprint sensor, and an optical fingerprint sensor 12 is integrated on a back surface of an OLED display panel 11, so that compared to a conventional capacitive fingerprint sensor, there is no need to provide an opening on a surface of the display panel to place the capacitive fingerprint sensor, and a screen occupation ratio can be improved.
Between the optical fingerprint sensor 12 and the OLED display panel 11, there is a collimating system 15, which may be a fiber optic panel fop (fiber optical panels). The upper surface of the collimating system 15 is fixedly bonded with the OLED display panel 11 through one layer of optical cement OCA1, and the lower surface is fixedly bonded with the optical fingerprint sensor through another layer of optical cement OCA 2. The side of the optical fingerprint sensor 12 away from the light-emitting surface of the OLED display panel 11 is bound to the circuit board 19. The display device protects the collimating system 15 and the optical fingerprint sensor 12 by sealing with a sealing glue 18.
The OLED display panel has an array substrate 10 and a plurality of OLED pixels 13 disposed on the array substrate 10. The array substrate 10 comprises a transparent substrate 101 and a driving circuit arranged on a side of the transparent substrate 101 facing away from the optical fingerprint sensor 12, wherein the driving circuit comprises a plurality of Thin Film Transistors (TFTs). The thin film transistor TFT includes a gate electrode G, a source electrode S, and a drain electrode D. The lower ends of the source S and the drain D are connected to the active region 102. The OLED pixel 13 includes an anode 131, a light emitting functional layer 132, and a cathode 133 sequentially arranged from bottom to top. The anodes 131 of all the OLED pixels 13 are independent structures, and the cathodes 133 are the same transparent electrode layer. The anode 131 of each OLED pixel 13 is individually connected to the source S of one thin film transistor TFT.
The array substrate 10 is provided with a pixel defining layer PDL for dividing a plurality of pixel regions each for disposing the anode 131 of one OLED pixel 13 and the light emitting function layer 132. The pixel defining layer PDL is provided thereon with support columns PS, which are located on the pixel defining layer PDL between adjacent pixel regions. For supporting the cover plate 161.
The optical fingerprint sensor 12 has a plurality of light sensing units 14. When a fingerprint image is collected, a finger 17 touches the area, facing the optical fingerprint sensor 12, of the cover plate 16 of the OLED display panel 11, an emergent light signal of the OLED pixel 13 in the area irradiates the finger 17, is reflected by the finger 17, then sequentially enters the light sensing unit 14 of the optical fingerprint sensor 12 through the OLED display panel 11 and the collimating system 15, and then forms the fingerprint image through the light sensing unit 14.
Ideally, each light sensing unit 14 collects the light signal reflected by the finger 17 at the opposite position above the light sensing unit to form the fingerprint image of the part of the finger, but as shown by the dotted arrow in fig. 1, the propagation direction of the light signal incident on each light sensing unit 14 cannot be precisely controlled in the display device, so that the light signal reflected by the part of the finger opposite to one light sensing unit 14 is incident on another light sensing unit 14, and thus, noise crosstalk is generated on the other light sensing unit 14, which affects the accuracy of fingerprint identification.
In order to solve the above problems, an embodiment of the present invention provides a display device and an electronic apparatus, and in the embodiment of the present invention, a fingerprint identification area is disposed, at least a portion of the support pillars have first through holes penetrating through the support pillars, an optical fingerprint sensor is disposed on the back surface of the OLED display panel, and the optical fingerprint sensor is disposed opposite to the fingerprint identification area, so that an optical signal containing fingerprint information irradiates the optical fingerprint sensor through the first through holes, and a path of the optical signal incident on the optical fingerprint sensor can be controlled through the first through holes, thereby avoiding a crosstalk problem of a sensing unit in the optical fingerprint sensor, and improving accuracy of fingerprint identification.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Referring to fig. 2, fig. 2 is a schematic structural diagram of a display device according to an embodiment of the present invention, the display device including: an OLED display panel 21 and an optical fingerprint sensor 22. The OLED display panel is provided with a display surface and a back surface which are oppositely arranged. Wherein the optical fingerprint sensor 22 is located at the back of the OLED display panel.
The OLED display panel 21 includes a plurality of OLED pixels 23 arranged in an array, and a plurality of supporting pillars 31, where the supporting pillars 31 are located between two adjacent OLED pixels 23, and at most one supporting pillar 31 is disposed between two adjacent OLED pixels 23; at least part of the display area of the OLED display panel is a fingerprint identification area, and the fingerprint identification area is provided with a plurality of OLED pixels 23 and a plurality of supporting columns 31; in the fingerprint identification area, at least part of the supporting columns 31 are provided with first through holes 32 penetrating through the supporting columns 31 in the first direction; the first direction is perpendicular to the OLED display panel 21. In the first direction, the optical fingerprint sensor 22 is arranged opposite to the fingerprint identification area, and a light signal containing fingerprint information illuminates the optical fingerprint sensor 22 through the first through hole 32.
In the display device according to the embodiment of the invention, the light signal propagation path can be controlled by the first through hole 32 arranged in the support pillar 31, so that the light signal (i) with small angle incidence irradiates the corresponding light sensing unit 24 of the optical fingerprint sensor 22, and the light signal (i) with large angle incidence does not irradiate other light sensing units 24 due to the shielding of the support pillar and the OLED pixel 23, thereby avoiding the crosstalk problem of different light sensing units 24 in the optical fingerprint sensor 22. In particular, in the display device, the hollow first through hole 31 has a higher transmittance relative to the solid medium layer, so that the intensity of the light signal incident to the light sensing unit 24 can be improved, and the fingerprint identification precision can be improved.
The optical fingerprint sensor has a plurality of light sensing units 24; in the first direction, each of the light sensing units 24 corresponds to one of the first through holes 32. The light sensing units 24 are vertically arranged opposite to the first through holes 32 one by one, and each light sensing unit 24 can acquire a small-angle incident light signal reflected by an area right above the light sensing unit, so that the light signals incident by a large angle in the area are prevented from being incident into other light sensing units 24 or the light signals incident into the light sensing unit 24 by a large angle reflected by other areas, and the crosstalk problem of different light sensing units 24 in the optical fingerprint sensor 22 is avoided.
In the display device, one light sensing unit 31 is correspondingly arranged between any two adjacent OLED pixels 23 in the fingerprint identification area; or, in the fingerprint identification area, one light sensing unit 31 is correspondingly arranged between any two adjacent OLED pixels 23 in the array direction; or, in the fingerprint identification area, one light sensing unit 31 is correspondingly arranged between any two adjacent OLED pixels 23 in the row direction of the array. The number and the distribution mode of the supporting columns 31 can be set according to the requirement of the supporting effect, so that the supporting columns 31 have a good supporting effect in the display device.
The light sensing unit 24 is disposed on a surface of a circuit board 28 and faces the OLED display panel 21. Between the optical fingerprint sensor 22 and the OLED display panel 21, there is a collimation system 25, and the collimation system 25 may be a fiber optic panel FOP. When fingerprint collection is performed, the finger 27 touches the cover plate 26 of the OLED display panel 21, and the optical signal reflected by the finger 27 is incident on the light sensing unit 24 directly below through the first through hole 32. The upper surface of the collimating system 25 is bonded and fixed with the OLED display panel 21 through an optical adhesive layer OCA1, and the lower surface thereof is bonded and fixed with the optical fingerprint sensor 22 through another optical adhesive layer OCA 2. An encapsulation adhesive layer 400 is disposed between the optical fingerprint sensor 22 and the OLED display panel 21 for encapsulating and protecting the collimating system 24 and the optical fingerprint sensor 22.
It can be seen that, in the fingerprint identification area provided in the embodiment of the present invention, at least a portion of the supporting pillars 31 has first through holes 32 penetrating through the supporting pillars, the optical fingerprint sensor 22 is provided on the back surface of the OLED display panel 21, and the optical fingerprint sensor 22 is disposed opposite to the fingerprint identification area, so that the optical signal containing fingerprint information irradiates the optical fingerprint sensor 22 through the first through holes 32, and the path of the optical signal incident on the optical fingerprint sensor 22 can be controlled through the first through holes 32, thereby avoiding the crosstalk problem of the light sensing unit 24 in the optical fingerprint sensor 22, and improving the accuracy of fingerprint identification.
Part of the display area can be set as the fingerprint identification area, and the whole display area can also be set as the fingerprint identification area. In the embodiment of the present invention, it is preferable that a part of the display area is set as a fingerprint recognition area, so that the optical fingerprint sensor 22 of a smaller size can be used to be disposed in a predetermined area of the rear surface of the display device, and fingerprint collection and recognition can be performed in the fingerprint recognition area of a fixed position in the display area.
Referring to fig. 3, fig. 3 is a top view of an OLED pixel and a supporting pillar of a display device according to an embodiment of the present invention, in this manner, a portion of the display area 33 includes a fingerprint identification area 34, and a portion of the display area 33 is configured as the fingerprint identification area 34. Another portion of the display area is a non-fingerprint identification area 35. The position 33 of the fingerprint identification area 34 in the display area 33 can be set according to the requirement, and it can be set at the center position of the display area 33, or at the upper end, or at the lower end, or at any vertex angle.
The support column 31 in the non-fingerprint identification area 35 is of a solid structure, so that the support column 31 in the non-fingerprint identification area 35 has good mechanical strength, and a good support effect is guaranteed.
Since the supporting columns 31 are provided with the first through holes 32, the supporting effect of the supporting columns 31 with the first through holes 32 is weaker than that of the supporting columns 31 with the solid structure, so that the density of the supporting columns 31 in the fingerprint identification area 34 is greater than that of the supporting columns 31 in the non-fingerprint identification area 35, and thus, by increasing the density of the supporting columns 31 in the fingerprint identification area 34 and increasing the supporting effect of all the supporting columns 31 in the fingerprint identification area 34, the problem of the weakened supporting effect caused by the arrangement of the first through holes 32 on the supporting columns 31 in the fingerprint identification area 34 can be solved.
In order to ensure the overall supporting effect of the supporting pillars 31 in the fingerprint identification area 34 to the greatest extent, one supporting pillar 31 may be disposed between any two adjacent OLED pixels 23 in the fingerprint identification area 34. That is to say, in the fingerprint identification area 34, one supporting column 31 is disposed on any two adjacent OLED pixels 23 in the row direction, and one supporting column 31 is disposed on any two adjacent OLED pixels 23 in the column direction.
In other ways, on the premise that the supporting effect is satisfied, in the fingerprint identification area 34, only one supporting column 31 may be disposed between a part of two adjacent OLED pixels 23, and the other supporting column 31 is not disposed between another part of two adjacent OLED pixels 23. In order to guarantee the overall supporting effect of the supporting columns 31 in the fingerprint identification area 34 to the maximum extent, improve the fingerprint identification precision and reduce the area of the optical fingerprint sensor 22, all the supporting columns 31 in the fingerprint identification area 34 are provided with the first through holes 32, and any two adjacent supporting columns 31 in the fingerprint identification area 34 are provided with one supporting column 31 between the OLED pixels 23.
As shown in fig. 2, the OLED display panel 21 has an array substrate 29, and the OLED pixels 23 and the supporting pillars 31 are located on a surface of the array substrate 29 facing away from the optical fingerprint sensor 22.
The OLED pixel 23 has an anode 231, a light-emitting functional layer 232, and a cathode 233. The anode 231 of each OLED pixel 23 is a separate structure, and the cathodes 233 of all OLED pixels 23 are the same cathode layer and are of a common cathode structure. The position of the cathode layer corresponding to the first through hole 32 of the support pillar 31 is a hollow structure, so that light can pass through the hollow structure. The anode 231 of the OLED pixel 23 is located on the surface of the planarization layer 292, and is connected to the source S of the corresponding thin film transistor TFT through a via hole located on the planarization layer 292. The pixel defining layer 293 is located on a surface of the anode 231 facing away from the planarization layer 292, and has a groove for exposing a portion of the anode 293 in the pixel region, and the light emitting function layer 232 is formed in the groove. The cathode layer covers the light-emitting functional layer 232, the supporting pillars 31 and the pixel defining layer 293, and has a hollow area at a position corresponding to the first through hole 32.
In the display device according to the embodiment of the present invention, the array substrate 29 has a transparent substrate 291, and a plurality of thin film transistors TFT connected to the OLED pixels 23 in a one-to-one correspondence are disposed on a side of the transparent substrate 291 away from the optical fingerprint sensor 22. The surface of the thin film transistor TFT is covered with a planarization layer 292. A surface of the planarization layer 292 on a side facing away from the thin film transistor TFT is covered with a pixel defining layer 293. The pixel defining layer 293 is used for dividing a plurality of pixel regions, each of which is used for forming one of the OLED pixels 23.
The thin film transistor TFT includes a polysilicon active region 33, a gate electrode G, a source electrode S, and a drain electrode D. The thin film transistor TFT is of a top gate structure, the polycrystalline silicon active region 33 is located on one side, away from the optical fingerprint sensor 22, of the transparent substrate 291, the surface of the active region 33 is covered with a gate insulating layer, the surface of the gate insulating layer is provided with a gate G, the surface of the gate G is covered with an insulating medium layer, the surface of the insulating medium layer is provided with a source electrode S and a drain electrode D, and the source electrode S and the drain electrode D are connected with the polycrystalline silicon active region 33 through. The source S and the drain D are covered with the pixel defining layer 293.
Referring to fig. 4, fig. 4 is a schematic structural diagram of another display device according to an embodiment of the present invention, and the manner shown in fig. 4 is different from the manner shown in fig. 2 in that in the manner shown in fig. 4, a second through hole 294 is disposed below the supporting pillar 32 in the first direction in a region of the pixel defining layer 293 corresponding to the first through hole 32, and a third through hole 295 is disposed in a region of the planarization layer 292 corresponding to the first through hole 32. The second through hole 294 and the third through hole 295 may be provided with the same hole diameter as that of the first through hole 32, or may be different in other ways.
The pixel defining layer 293 and the planarization layer 292 have a certain light transmittance, but the absorptance of the two for light signals is high. In this embodiment, the intensity of the light signal entering the first through hole 32 reaching the setting photosensitive unit 24 can be increased, the absorption of the light signal by the pixel defining layer 293 and the planarization layer 292 can be reduced, and the fingerprint recognition accuracy can be improved, for example, the transmittance of the pixel defining layer 293 is about 30%, and the transmittance of the pixel defining layer 293 at the second through hole 294 can be 100% by providing the second through hole 294 on the pixel defining layer 293.
In another embodiment, as shown in fig. 5, fig. 5 is a schematic structural diagram of a display device according to another embodiment of the present invention, and the difference between the embodiment shown in fig. 5 and the embodiment shown in fig. 2 is that in the embodiment shown in fig. 5, a second through hole 294 is disposed in an area where the pixel definition layer 293 is disposed corresponding to the first through hole 32 in the first direction. The shape of the second through hole 294 may be the same as or different from the shape of the first through hole 31.
In another embodiment, as shown in fig. 6, fig. 6 is a schematic structural diagram of another display device according to an embodiment of the present invention, and the embodiment shown in fig. 5 is different from the embodiment shown in fig. 2 in that in fig. 5, a third through hole 295 is provided in a region where the planarization layer 292 is provided corresponding to the first through hole 32 in the first direction. The shape of the third through hole 295 may be the same as or different from that of the first through hole 31.
In another embodiment, the transmittance of the optical signal can be increased by reducing the thicknesses of the pixel defining layer 293 and the planarization layer 292.
In the embodiment of the present invention, the shape of the first through hole 31 may be set as required, and the first through hole 31 may be a square hole, a circular hole, or a triangular hole. The aperture of the first through hole 31 ranges from 150 μm to 250 μm in a direction parallel to the OLED display panel.
In a general finger fingerprint, the width L1 of the ridge line is 200-400 μm, and the width L2 of the valley line is 150-250 μm. The aperture range of the first through hole 31 is adapted to the width of the valley line, so that on one hand, the transmittance can be improved, and on the other hand, the reflected light of adjacent regions can be prevented from crosstalk, so that the fingerprint identification precision is improved, and preferably, the aperture of the first through hole 31 can be set to be 200 μm.
Alternatively, the support column 31 may be cylindrical, or prismatic, or truncated pyramidal. When the support post is a truncated cone, the surface of the truncated cone facing the optical fingerprint sensor 22 is larger than the surface thereof facing away from the optical fingerprint sensor 22, which facilitates the preparation of the support post 31.
In order to avoid the crosstalk between different light-sensing units 24 caused by the large-angle oblique incident light signals to the greatest extent, the supporting posts 31 are set to be opaque and have a reflectivity greater than 80%, so as to block and reflect the large-angle oblique incident light signals to a greater extent. And the reflectivity of the inner wall of the first through hole 32 is high, so that the light signal which is incident to the first through hole 31 and irradiates the side wall of the first through hole can be reflected downwards, the light signal with high intensity is incident to the photosensitive unit 24, and the identification precision is improved.
The OLED display panel 21 has a display driving circuit for driving the OLED pixels 23 to display an image. The driving circuit includes the thin film transistor TFT. When the optical fingerprint sensor 22 collects a fingerprint image, the display driving circuit is further configured to drive the display array to display a preset image corresponding to the position of the fingerprint identification area, so as to display the position of the fingerprint identification area. This facilitates the user in locating the fingerprint identification area for facilitating fingerprint acquisition.
Referring to fig. 7, fig. 7 is a schematic diagram illustrating an operating principle of a driving circuit according to an embodiment of the present invention, in which an OLED display panel 21 has a plurality of OLED pixels 23 arranged in an array, and fig. 7 shows an OLED pixel 231 located in a fingerprint identification area and an OLED pixel 232 located in a non-fingerprint identification area.
The driving circuit is provided with a plurality of pixel circuits 51 which are connected with the OLED pixels 23 in a one-to-one correspondence mode, the pixel circuits 51 are used for obtaining display DATA signals DATA1 of a control chip IC, and the connected OLED pixels are controlled to display images to be displayed based on the display DATA signals DATA 1. As shown in fig. 5, during normal display, the pixel circuit 511 connected to the OLED pixel 232 and the pixel circuit 512 connected to the OLED pixel 231 both obtain the display DATA signal DATA1 sent by the control IC to control the connected OLED pixel 231 and OLED pixel 232 to display the image to be displayed respectively.
The pixel circuit 51 connected to the OLED pixel 23 located in the fingerprint identification area is further configured to obtain a fixed DATA signal DATA2 sent by the control chip IC when there is a fingerprint identification request, and control the connected OLED pixel 23 to display the preset image based on the fixed DATA signal DATA 2. When the OLED pixels are normally displaying, the control chip IC and the pixel circuit 512 are disconnected, and when there is a fingerprint identification request, a control signal is generated to enable the control chip IC and the pixel circuit 512 to be connected, so as to provide a fixed DATA signal DATA2 for the OLED pixels 231 in the fingerprint identification area to display a preset image. At this time, the control chip IC supplies the fixed DATA signal DATA2 only to the pixel circuit 512 and normally supplies the display DATA signal DATA1 to the OLED pixels 232 of the non-fingerprint recognition area, so that the OLED pixels 232 of the non-fingerprint recognition area normally display an image. The fixed DATA signal DATA2 causes the display brightness of the OLED231 pixels in the fingerprint identification region to increase or decrease relative to the display brightness of the OLED pixels 232 in the non-fingerprint identification region to show the preset image.
The control chip IC may output the fixed DATA signal DATA2 to the pixel circuit 512 directly, or may output the fixed DATA signal DATA2 through the FPC and output the fixed DATA signal DATA2 to the pixel circuit 512 through the FPC.
The display device is used for electronic equipment. The preset image is a hidden icon and is used for showing the position of the fingerprint identification area when the preset image is displayed. When a user inputs a fingerprint acquisition trigger signal, the drive circuit is used for driving the OLED pixels in the fingerprint identification area to display the preset image. The fingerprint acquisition trigger signal can be input through a mechanical key of the electronic equipment. Or the user inputs when triggering the touch icon of the OLED display panel. And when the fingerprint acquisition trigger signal is acquired, the control chip generates the control signal.
As can be seen from the above description, in the display device according to the embodiment of the present invention, the optical signal propagation path can be controlled by the support pillar 31 having a specific structure, so as to prevent crosstalk between different photosensitive units 24, so that the fingerprint identification accuracy is high, and the transmittance of the optical signal for fingerprint identification can be improved by the through hole design, so as to further improve the fingerprint identification accuracy.
Based on the foregoing embodiment, another embodiment of the present invention further provides an electronic device, where the electronic device is shown in fig. 8, and fig. 8 is a schematic structural diagram of the electronic device according to the embodiment of the present invention, and the electronic device includes the display device 41 according to the foregoing embodiment. The electronic device can be a mobile phone, a tablet computer, a wearable electronic device or other electronic devices with a display function.
According to the electronic equipment provided by the embodiment of the invention, the display device provided by the embodiment is adopted, and the optical fingerprint sensor is integrated in the display device, so that the problem of crosstalk among different photosensitive units can be avoided, and the fingerprint identification precision is improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. For the electronic device disclosed in the embodiment, since it corresponds to the display device disclosed in the embodiment, the description is relatively simple, and the relevant points can be referred to the corresponding parts of the display device for description.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (11)
1. A display device, characterized in that the display device comprises:
the OLED display panel comprises a plurality of OLED pixels arranged in an array and a plurality of supporting columns, wherein the supporting columns are positioned between two adjacent OLED pixels, and at most one supporting column is arranged between two adjacent OLED pixels; at least part of the display area of the OLED display panel is a fingerprint identification area, and the fingerprint identification area is provided with a plurality of OLED pixels and a plurality of support columns; in the fingerprint identification area, at least part of the supporting columns are provided with first through holes penetrating through the supporting columns in a first direction; the support posts are opaque;
the optical fingerprint sensor is arranged opposite to the fingerprint identification area in the first direction, an optical signal containing fingerprint information is irradiated to the optical fingerprint sensor through the first through hole, and the first direction is perpendicular to the OLED display panel.
2. The display device according to claim 1, wherein a part of the display area is the fingerprint identification area;
the other part of the display area is a non-fingerprint identification area, and support columns in the non-fingerprint identification area are of a solid structure;
the density of the support columns in the fingerprint identification area is greater than the density of the support columns in the non-fingerprint identification area.
3. The display device according to claim 1, wherein one support pillar is disposed between any two adjacent OLED pixels in the fingerprint identification area.
4. The display device of claim 1, wherein the OLED display panel has an array substrate, the OLED pixels being located on a side of the array substrate facing away from the optical fingerprint sensor;
the array substrate is provided with a transparent substrate, and a TFT (thin film transistor) element is arranged on one side of the transparent substrate, which is far away from the optical fingerprint sensor;
a planarization layer is arranged on one side, away from the transparent substrate, of the TFT element;
a pixel defining layer is arranged on one side, away from the TFT element, of the planarization layer, the pixel defining layer is provided with a plurality of opening areas corresponding to the OLED pixels one by one, and the opening areas are used for arranging the OLED pixels;
in the first direction, a second through hole is arranged in a region of the pixel definition layer corresponding to the first through hole, and/or a third through hole is arranged in a region of the planarization layer corresponding to the first through hole.
5. The display device according to claim 1, wherein the first through hole is a square hole or a round hole.
6. The display device according to claim 1, wherein the support column is a cylinder, or a prism, or a truncated cone;
wherein a surface of the truncated cone facing the optical fingerprint sensor is larger than a surface thereof facing away from the optical fingerprint sensor.
7. The display device according to claim 1, wherein the optical fingerprint sensor has a plurality of light sensing units;
in the first direction, each light sensing unit corresponds to one first through hole.
8. The display device according to claim 7, wherein one light sensing unit is correspondingly arranged between any two adjacent OLED pixels in the fingerprint identification area;
or, in the fingerprint identification area, one light sensing unit is correspondingly arranged between any two adjacent OLED pixels in the array direction;
or, in the fingerprint identification area, one light sensing unit is correspondingly arranged between any two adjacent OLED pixels in the row direction of the array.
9. The display device of claim 1, wherein the support posts are opaque and have a reflectivity greater than 80%.
10. The display device according to claim 1, wherein an aperture diameter of the first via hole ranges from 150 μm to 250 μm in a direction parallel to the OLED display panel.
11. An electronic device characterized in that the electronic device comprises a display device according to any one of claims 1-10.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889192.4A CN109034089B (en) | 2018-08-07 | 2018-08-07 | Display device and electronic equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810889192.4A CN109034089B (en) | 2018-08-07 | 2018-08-07 | Display device and electronic equipment |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109034089A CN109034089A (en) | 2018-12-18 |
| CN109034089B true CN109034089B (en) | 2020-11-20 |
Family
ID=64648926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810889192.4A Active CN109034089B (en) | 2018-08-07 | 2018-08-07 | Display device and electronic equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109034089B (en) |
Families Citing this family (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109299635B (en) * | 2017-07-25 | 2021-03-09 | 中芯国际集成电路制造(上海)有限公司 | Fingerprint sensor and forming method thereof |
| CN109359640B (en) * | 2018-12-21 | 2021-02-26 | 武汉华星光电半导体显示技术有限公司 | Fingerprint identification display panel and fingerprint identification method |
| WO2020135107A1 (en) * | 2018-12-29 | 2020-07-02 | Oppo广东移动通信有限公司 | Oled pixel structure, oled display screen and electronic device |
| CN109509781A (en) * | 2018-12-29 | 2019-03-22 | Oppo广东移动通信有限公司 | OLED pixel structure, OLED display screen and electronic equipment |
| CN109934174B (en) * | 2019-03-15 | 2021-06-22 | 广州国显科技有限公司 | Display panel, display device and fingerprint identification method |
| CN110290243B (en) | 2019-06-24 | 2022-07-08 | Oppo广东移动通信有限公司 | Display device, electronic apparatus, and image acquisition method |
| CN110289296B (en) * | 2019-06-28 | 2022-03-29 | 武汉天马微电子有限公司 | Display panel and display device |
| CN110350010B (en) * | 2019-07-04 | 2022-01-04 | 武汉华星光电半导体显示技术有限公司 | Display device and manufacturing method thereof |
| CN110543821B (en) * | 2019-07-29 | 2024-02-09 | 京东方科技集团股份有限公司 | Grain recognition device and operation method thereof |
| CN113366651A (en) * | 2019-07-29 | 2021-09-07 | 深圳市柔宇科技股份有限公司 | Display module, manufacturing method thereof and display device |
| CN110501839A (en) | 2019-07-30 | 2019-11-26 | 武汉华星光电技术有限公司 | Display panel and display device |
| CN111029386B (en) * | 2019-12-19 | 2022-05-20 | 合肥视涯技术有限公司 | Organic light emitting display panel and organic light emitting display device |
| CN111062367A (en) * | 2019-12-31 | 2020-04-24 | 武汉华星光电半导体显示技术有限公司 | Fingerprint identification device |
| CN112436037B (en) * | 2020-11-23 | 2024-02-27 | 京东方科技集团股份有限公司 | Display device, display panel and manufacturing method thereof |
| CN113113460B (en) * | 2021-04-09 | 2022-08-30 | 武汉天马微电子有限公司 | Display panel and display device |
| CN114284319B (en) * | 2021-12-14 | 2023-09-26 | 武汉华星光电半导体显示技术有限公司 | Display panel and electronic equipment |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881196A (en) * | 2015-06-23 | 2015-09-02 | 京东方科技集团股份有限公司 | Substrate and display screen |
| CN106940488A (en) * | 2017-04-27 | 2017-07-11 | 上海天马微电子有限公司 | Display panel and display device |
| CN107423728A (en) * | 2017-09-07 | 2017-12-01 | 京东方科技集团股份有限公司 | Optical texture and preparation method thereof, display base plate and display device |
| CN107463911A (en) * | 2017-08-10 | 2017-12-12 | 京东方科技集团股份有限公司 | A kind of fingerprint identification device, array base palte and display device |
| CN107591430A (en) * | 2017-09-14 | 2018-01-16 | 深圳市华星光电半导体显示技术有限公司 | The preparation method of color membrane substrates |
| CN107819018A (en) * | 2017-10-31 | 2018-03-20 | 武汉天马微电子有限公司 | A kind of electroluminescence display panel and display device |
| CN108229394A (en) * | 2018-01-03 | 2018-06-29 | 上海天马微电子有限公司 | Display panel and display device |
Family Cites Families (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10410037B2 (en) * | 2015-06-18 | 2019-09-10 | Shenzhen GOODIX Technology Co., Ltd. | Under-screen optical sensor module for on-screen fingerprint sensing implementing imaging lens, extra illumination or optical collimator array |
| CN105678255B (en) * | 2016-01-04 | 2019-01-08 | 京东方科技集团股份有限公司 | A kind of optical fingerprint identification display screen and display device |
| CN106298859B (en) * | 2016-09-30 | 2018-09-04 | 京东方科技集团股份有限公司 | Touch panel and display device |
| US10587738B2 (en) * | 2017-01-26 | 2020-03-10 | Guangdong Oppo Mobile Telecommunications Corp., Ltd. | Display module and electronic device |
| CN107092892B (en) * | 2017-04-27 | 2020-01-17 | 上海天马微电子有限公司 | Display panel and display device |
| CN107133613B (en) * | 2017-06-06 | 2020-06-30 | 上海天马微电子有限公司 | Display panel and display device |
| CN107749274B (en) * | 2017-11-15 | 2019-10-01 | 武汉天马微电子有限公司 | A kind of display panel and display device |
| CN108258022B (en) * | 2018-01-25 | 2020-11-13 | 京东方科技集团股份有限公司 | Pixel structure, display substrate and display device |
-
2018
- 2018-08-07 CN CN201810889192.4A patent/CN109034089B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104881196A (en) * | 2015-06-23 | 2015-09-02 | 京东方科技集团股份有限公司 | Substrate and display screen |
| CN106940488A (en) * | 2017-04-27 | 2017-07-11 | 上海天马微电子有限公司 | Display panel and display device |
| CN107463911A (en) * | 2017-08-10 | 2017-12-12 | 京东方科技集团股份有限公司 | A kind of fingerprint identification device, array base palte and display device |
| CN107423728A (en) * | 2017-09-07 | 2017-12-01 | 京东方科技集团股份有限公司 | Optical texture and preparation method thereof, display base plate and display device |
| CN107591430A (en) * | 2017-09-14 | 2018-01-16 | 深圳市华星光电半导体显示技术有限公司 | The preparation method of color membrane substrates |
| CN107819018A (en) * | 2017-10-31 | 2018-03-20 | 武汉天马微电子有限公司 | A kind of electroluminescence display panel and display device |
| CN108229394A (en) * | 2018-01-03 | 2018-06-29 | 上海天马微电子有限公司 | Display panel and display device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109034089A (en) | 2018-12-18 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109034089B (en) | Display device and electronic equipment | |
| CN107425041B (en) | touch display panel, device and manufacturing method | |
| US10361255B2 (en) | Display panel and display device | |
| US20190056613A1 (en) | Display device | |
| CN109037296B (en) | Display device and electronic equipment | |
| CN106096595B (en) | Fingerprint identification module, manufacturing method thereof and fingerprint identification display device | |
| EP3174044B1 (en) | Pixel drive circuit and drive method thereof, array substrate, and transparent reflective display device | |
| US20230123648A1 (en) | Display panel and display device | |
| US10705641B2 (en) | Sensing panel, and display device and driving method thereof | |
| WO2019137002A1 (en) | Display panel and display device | |
| JP4683135B2 (en) | Display device with position detection function and electronic device | |
| CN111095277B (en) | Optical fingerprint device and electronic equipment | |
| JP2007506178A (en) | Light touch screen | |
| KR20120045287A (en) | Plat panel display having a touch sensor | |
| US11308725B2 (en) | Touch display device | |
| KR102460111B1 (en) | Flat Panel Display Embedding Optical Imaging Sensor | |
| CN108805055B (en) | Display panel and display device | |
| US20220139104A1 (en) | Screen Assembly and Electronic Device | |
| WO2019148798A1 (en) | Pattern identification device and display apparatus | |
| CN108805051B (en) | Display panel and display device | |
| CN210864756U (en) | Optical fingerprint device and electronic equipment | |
| KR20160043217A (en) | Display device including fingerprinting device and driving method the same | |
| CN112259581A (en) | Control assembly, display screen and control device | |
| US20190204959A1 (en) | Touch input device | |
| US11769344B2 (en) | Pattern identification device and display apparatus |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |