CN110176484B - Display device - Google Patents

Display device Download PDF

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Publication number
CN110176484B
CN110176484B CN201910561419.7A CN201910561419A CN110176484B CN 110176484 B CN110176484 B CN 110176484B CN 201910561419 A CN201910561419 A CN 201910561419A CN 110176484 B CN110176484 B CN 110176484B
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China
Prior art keywords
light
dimming
display device
area
sub
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CN201910561419.7A
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Chinese (zh)
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CN110176484A (en
Inventor
张国君
梅文娟
李纪
史高飞
李朋
黄炯
胡文成
祝政委
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BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
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BOE Technology Group Co Ltd
Hefei BOE Optoelectronics Technology Co Ltd
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Priority to CN201910561419.7A priority Critical patent/CN110176484B/en
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    • G—PHYSICS
    • G02—OPTICS
    • G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
    • G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
    • G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour 
    • G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour  based on liquid crystals, e.g. single liquid crystal display cells
    • G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
    • G02F1/1333—Constructional arrangements; Manufacturing methods
    • 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
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • 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
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes
    • H10K59/65—OLEDs integrated with inorganic image sensors

Abstract

The embodiment of the invention provides a display device, relates to the technical field of display, and can prolong the service life of a plurality of line identification units in a display stage. The display device is provided with a display area, and the display area comprises a line identification area; the texture recognition area comprises a plurality of sub-pixel areas and non-sub-pixel areas; the display device comprises a light-emitting structure, a first light-adjusting structure arranged on the light-emitting side of the light-emitting structure and a plurality of line identification units arranged at intervals, wherein the line identification units are positioned on one side of the first light-adjusting structure, which is far away from the light-emitting structure; the plurality of line identification units are positioned in the non-sub-pixel area; the first dimming structure comprises a first dimming part and a second dimming part, the first dimming part is positioned in the sub-pixel area, the second dimming part is positioned in the non-sub-pixel area, and the orthographic projection of the grain identification unit on the light-emitting structure is overlapped with the orthographic projection of the second dimming part on the light-emitting structure; at the grain detection stage, at least the second dimming part is transparent; in the display stage, the first dimming part transmits light, and the second dimming part shields light.

Description

Display device
Technical Field
The invention relates to the technical field of display, in particular to a display device.
Background
In recent years, with the continuous development of display technology, biometric identification technology is applied more and more widely in the display industry, wherein fingerprint identification is particularly prominent. Fingerprints are used as unique identity characteristics of human beings, and are concerned by the field of life identification.
Fingerprint identification includes three modes of capacitance type, optical type and ultrasonic type. When the capacitive fingerprint identification is applied to full-screen fingerprint identification, the capacitive fingerprint identification is only limited to a fixed position, and full-screen position fingerprint identification cannot be effectively realized; the ultrasonic fingerprint identification structure is complex, the technology is immature, and the practicability is not high when the ultrasonic fingerprint identification method is applied to full-screen fingerprint identification; the optical fingerprint identification structure is simple and high in implementability.
Optical fingerprint identification requires an optical sensor to be disposed in a display panel to convert an optical signal received by the optical sensor into an electrical signal, so as to perform fingerprint identification.
However, if the photosensor is exposed to light for a long period of time, the lifetime of the photosensor may be greatly reduced.
Disclosure of Invention
Embodiments of the present invention provide a display device, which can prevent a plurality of texture recognition units from being in an illumination environment for a long time in a display stage, so as to prolong the service life of the plurality of texture recognition units.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
providing a display device having a display area including a grain identification area; the texture recognition area comprises a plurality of sub-pixel areas and non-sub-pixel areas positioned between the adjacent sub-pixel areas; the display device comprises a light-emitting structure, a first dimming structure arranged on the light-emitting side of the light-emitting structure and a plurality of line identification units arranged at intervals, wherein the line identification units are positioned on one side of the first dimming structure, which is far away from the light-emitting structure; the plurality of line identification units are positioned in the non-sub-pixel area; the first dimming structure comprises a first dimming part and a second dimming part, the first dimming part is located in the sub-pixel area, the second dimming part is located in the non-sub-pixel area, and the orthographic projection of the grain identification unit on the light-emitting structure is overlapped with the orthographic projection of the second dimming part on the light-emitting structure; at the texture detection stage, at least the second dimming part is transparent; in the display stage, the first dimming portion transmits light, and the second dimming portion blocks light.
Optionally, the display device further includes a second dimming structure disposed on a side of the plurality of texture recognition units away from the first dimming structure, the second dimming structure is disposed in the non-subpixel region, and an orthographic projection of the second dimming structure on the light emitting structure covers an orthographic projection of the plurality of texture recognition units on the light emitting structure; in the texture detection stage, the second dimming structure is transparent; and in the display stage, the second dimming structure shades light.
Optionally, in the thickness direction of the display device, the first dimming structure includes a first electrode layer, a first insulating layer, a second electrode layer, and a first dimming layer, which are sequentially stacked; the first electrode layer comprises a plurality of first electrodes arranged at intervals, and the second electrode layer comprises a plurality of second electrodes arranged at intervals; the first electrodes correspond to the second electrodes one to one, and orthographic projections of the first electrodes and the second electrodes corresponding to the first electrodes on the light-emitting structures are overlapped; the first dimming layer comprises a first dimming unit and a second dimming unit; the first dimming unit is located in the sub-pixel region, and the second dimming unit is located in the non-sub-pixel region; each first dimming unit and each second dimming unit correspond to and are in direct contact with one second electrode, and under the action of voltage between the first electrode and the second electrode, light transmittance of the first dimming unit and the second dimming unit changes; the second dimming structure comprises a third electrode layer, a second insulating layer, a fourth electrode layer and a second dimming layer which are sequentially stacked along the thickness direction of the display device, and the second dimming layer is in direct contact with the fourth electrode layer; the transmittance of the second light modulation layer changes by a voltage between the third electrode layer and the fourth electrode layer.
Optionally, the materials of the first dimming layer and the second dimming layer include electroluminescent materials or blue phase liquid crystals.
Optionally, the area of the texture recognition region is smaller than the area of the display region.
Optionally, in the texture detection stage, the first dimming portion transmits light.
Optionally, in the texture detection stage, the first dimming portion adjacent to any one of the light-transmitting first dimming portions is configured to block light.
Optionally, the display device is a self-light emitting display device; the light emitting structure is a plurality of light emitting devices.
Optionally, the area of the texture recognition area is equal to the area of the display area; the light emitted by the light-emitting device is white light; the display device further comprises a color filter layer arranged on the display side of the light-emitting device, wherein the color filter layer comprises a plurality of color resistance units arranged at intervals; the orthographic projection of the second light adjusting part on the color filter layer is positioned between the adjacent color resistance units; in the display phase, the second dimming part is reused as a black matrix in the display device.
Optionally, the display device is a liquid crystal display device; the area of the line identification area is equal to the area of the display area; in the display phase, the second dimming part is reused as a black matrix in the liquid crystal display device.
The embodiment of the invention provides a display device, which comprises a light-emitting structure and a plurality of line identification units arranged on the light-emitting side of the light-emitting structure, and the service life of the line identification units can be greatly reduced by considering that the line identification units are exposed to light for a long time when the display device displays. Based on this, in the embodiment of the present invention, the first dimming structure is disposed between the light emitting structure and the plurality of grain recognition units, and the first dimming layer includes the first dimming portion and the second dimming portion. The first dimming part is located in the sub-pixel area, the second dimming part is located in the non-sub-pixel area, and meanwhile, the grain identification unit is also located in the non-sub-pixel area. In the texture identification stage, at least the second dimming part is transparent so as to ensure that the intensity of reflected light which irradiates to the finger, is reflected by the finger and irradiates to the plurality of texture identification units is large enough to detect accurate fingerprint information; in the display stage, because a plurality of line recognition units and second portion of adjusting luminance all are located non-sub-pixel region, and the wide-angle light that sees through first portion of adjusting luminance is very few, can neglect, consequently, the accessible makes first portion of adjusting luminance printing opacity, the shading of second portion of adjusting luminance, improves in the display stage, and a plurality of line recognition units are in the problem under the illumination environment for a long time, and then improve a plurality of line recognition unit's life-span.
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 some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic top view of a display device according to an embodiment of the invention;
fig. 2 is a schematic top view of a display device according to an embodiment of the invention;
FIG. 3 is a schematic side view of a display device according to an embodiment of the present invention;
FIG. 4 is a schematic side view of a self-luminous display device according to an embodiment of the invention;
FIG. 5 is a schematic side view of a self-luminous display device according to an embodiment of the invention;
FIG. 6 is a schematic side view of an LCD device according to an embodiment of the present invention;
FIG. 7 is a schematic side view of an LCD device according to an embodiment of the present invention;
FIG. 8 is a schematic side view of a display device according to an embodiment of the present invention;
FIG. 9 is a schematic side view of a display device according to an embodiment of the present invention;
FIG. 10 is a schematic side view of a display device according to an embodiment of the present invention;
FIG. 11 is a schematic side view of a self-luminous display device according to an embodiment of the invention;
fig. 12 is a schematic side view of a liquid crystal display device according to an embodiment of the invention.
Reference numerals:
1-a frame; 2-a display panel; 301-lower polarizer; 302-an upper polarizer; 3-a circuit board; 4-cover plate; 41-an optical film; 42-a diffuser plate; 43-a light source; 44-a reflective sheet; 45-glue frame; 46-a back plate; 47-black glue; 48-a light guide plate; 11-a light emitting structure; 111-a light emitting device; 1111-an anode; 1112-a light emitting functional layer; 1113-cathode; 112-a pixel defining layer; 12-a first dimming structure; 121-a first dimming portion; 122-a second dimming portion; 1211 — a first electrode; 1212 — a first insulating layer; 1213-a second electrode; 1214-a first dimming layer; 2214-a first dimming unit; 2215-a second dimming unit; 13-a grain identification unit; 14-a second dimming structure; 141-a third electrode layer; 142-a second insulating layer; 143-a fourth electrode layer; 144-a second dimming layer; 15-a color filter layer; 100-a display area; 101-a grain identification area; 1011-sub-pixel area; 1012-non-subpixel areas.
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.
An embodiment of the present invention provides a display device, as shown in fig. 1 and fig. 2, having a display area 100, where the display area 100 includes a texture recognition area 101; the texture recognition region 101 comprises a plurality of sub-pixel regions 1011 and non-sub-pixel regions 1012 located between adjacent sub-pixel regions 1011; as shown in fig. 3, the display device includes a light emitting structure 11, a first light adjusting structure 12 disposed on a light emitting side of the light emitting structure 11, and a plurality of line identification units 13 disposed at intervals, where the plurality of line identification units 13 are located on a side of the first light adjusting structure 12 away from the light emitting structure 11; the plurality of grain identification units 13 are located in the non-sub-pixel region 1012; the first dimming structure 12 includes a first dimming portion 121 and a second dimming portion 122, the first dimming portion 121 is located in the sub-pixel region 1011, the second dimming portion 122 is located in the non-sub-pixel region 1012, and an orthogonal projection of the texture recognition unit 13 on the light emitting structure 11 overlaps an orthogonal projection of the second dimming portion 122 on the light emitting structure 11; at least the second light modulation part 122 transmits light in the texture detection stage; in the display stage, the first light modulation part 121 transmits light, and the second light modulation part 122 shields light.
In some embodiments, the display device may be used to detect a detected object with a fingerprint, a palm print, or the like, which is not particularly limited in the embodiments of the present invention. For convenience of explanation, the following description will be made with "finger" and "fingerprint".
Here, those skilled in the art should know that the principle of optical fingerprint recognition is: the display light emitted from the display device is reflected by the finger after being irradiated to the finger, and the reflected light reflected by the finger is irradiated to the grain recognition unit 13.
The lines of the finger comprise valleys and ridges, the reflected light intensity of the valleys and the reflected light intensity of the ridges are different, the line identification unit 13 receives the reflected light of the valleys and the reflected light of the ridges and converts light signals into electric signals, and the line identification circuit forms line images according to the electric signals and compares the line images with pre-stored line information to finish fingerprint identification.
In some embodiments, the area of the texture recognition region is less than or equal to the area of the display region.
As shown in fig. 1, if the area of the texture recognition area 101 is equal to the area of the display area 100, the entire display area 100 of the display device can be used for texture recognition; as shown in fig. 2, if the area of the grain recognition region 101 is smaller than the area of the display region 100, only the grain recognition region 101 may be used for grain recognition.
Optionally, the area of the texture recognition area 101 is smaller than the area of the display area 100, so that, during texture detection, the area of the display area 100 except the texture recognition area 101 can be normally displayed.
In some embodiments, the shape of the orthographic projection of the grain identifying unit 13 on the light emitting structure 11 is not defined.
For example, as shown in fig. 1 and 2, the orthographic projection of the grain identifying unit 13 on the light emitting structure 11 is in a shape of a circle, an ellipse, a rectangle, or the like.
In some embodiments, the texture recognition unit 13 is used to convert the optical signal into an electrical signal, which may be a photosensitive sensor, a photoelectric sensor, or the like.
In some embodiments, the display device may be an Organic Light Emitting Diode (OLED) display device, a Micro-LED (Micro-LED) display device, or a Quantum Dot Light Emitting diode (QLED) display device; alternatively, the display device may be a liquid crystal display device.
As shown in fig. 4 and 5, if the display device is one of an OLED display device, a QLED display device, or a Micro-LED display device, the light emitting structure 11 includes a plurality of light emitting devices 111.
As shown in fig. 4, the light-emitting device 111 includes an anode 1111, a light-emitting functional layer 1112, and a cathode 1113 stacked on top of each other, for example, in the case where the display device is an OLED display device or a QLED display device. The light emitting function layer 1112 of the OLED display device is an organic light emitting function layer, and the light emitting function layer 1112 of the QLED display device is a quantum dot light emitting function layer.
Here, fig. 4 only shows that the cathode 1113 is closer to the first dimming structure 12 than the anode 1111 and is common to the cathode. Furthermore, the cathode 1113 may also be disposed on a side of the anode 1111 facing away from the first light modulating structure 12. In the light emitting device, a common anode may be used.
On this basis, a pixel defining layer 112 is further provided between the adjacent light emitting devices 111.
As shown in fig. 5, the light emitting device 111 is a plurality of Micro-LED light emitting units, taking the display device as a Micro-LED display device as an example.
Here, the self-luminous display device includes an array substrate and an encapsulation layer. The first dimming structure 11 may be disposed on the array substrate or on the encapsulation layer.
As shown in fig. 6 and 7, if the display device is a liquid crystal display device, the light emitting structure 11 is a backlight module. The backlight module 4 may be a direct type backlight module or a side type backlight module.
On the basis, the display device further comprises a lower polarizer 301 between the display panel 2 and the backlight module and an upper polarizer 302 positioned at the light-emitting side of the display panel 2.
As shown in fig. 6, the direct type backlight module includes a back plate 46, a frame 45, a light source 43 disposed on the back plate 46, a diffusion plate 42 disposed on the light source 43, and an optical film 41 disposed on a light emitting side of the diffusion plate 42. Further, a reflective sheet 44 disposed between the back plate 46 and the light source 43 may be further included.
Illustratively, as shown in fig. 7, the edge-type backlight module includes a back plate 46, a rubber frame 45, a light guide plate 48 disposed on the back plate 46, an optical film 41 disposed on the light-emitting side of the light guide plate 48, and a light source 43 disposed on one side of the light guide plate 48. In addition, a reflective sheet 44 disposed between the back plate 46 and the light guide plate 48 may be further included.
The display panel 2 and the glue frame 45 may be fixed by black glue 47. The Light source 43 may be, for example, a Light-Emitting Diode (LED). The light guide plate 48 has a wedge-shaped cross section, a flat-plate shape, and the like. The structure of the backlight module 4 in fig. 6 and 7 is only schematic and not limited at all.
Here, the liquid crystal display device includes an array substrate and a pair cell substrate. The first dimming structure 11 may be disposed on the array substrate or the cell substrate.
In some embodiments, during the texture detection stage, the first light modulation part 121 may be transparent, or the first light modulation part 121 may also be opaque.
Here, in order to increase the intensity of the reflected light reflected from the finger onto the grain recognition unit 13 to improve the accuracy of the grain recognition, optionally, in the grain detection stage, both the first dimming part 121 and the second dimming part 122 are transparent.
In some embodiments, for the liquid crystal display device, although the light-shielding thin film transistor, the wire, and the like are disposed between the light-emitting structure 11 and the second light-modulating portion 122 in the non-sub-pixel region 1012, the area occupied by the thin film transistor and the wire is very small, most of the light emitted by the light-emitting structure 11 can be irradiated onto the finger through the second light-modulating portion 122, and therefore, in the texture detection stage, even if only the second light-modulating portion 122 transmits light, the texture detection effect is not affected.
In some embodiments, the sub-pixel areas 1011 are areas that are substantially transparent to light.
Taking an OLED display device with the display device as a common cathode as an example, the pixel defining layer 112 completely covers the pixel circuits in the display device, and the sub-pixel area 1011 is an area of the anode 111 except for an area overlapping with the pixel defining layer 112.
The non-sub-pixel region 1012 is a region where the pixel defining layer 112 is located.
In some embodiments, since the first light modulation part 121 transmits light and the second light modulation part 122 shields light during the display period, the second light modulation part 122 is only located in the non-pixel area 1012 in order not to affect the normal display brightness.
In some embodiments, the first light modulation part 121 may be located in the entire sub-pixel area 1011, or may be located in a part of the sub-pixel area 1011, as long as the entire sub-pixel area 1011 can transmit light when displaying.
The second light modulation part 122 may be located in the entire non-sub-pixel region 1012 or may be located in a part of the non-sub-pixel region 1012.
In some embodiments, the orthographic projection of the texture recognition unit 13 on the light emitting structure 11 is overlapped with the orthographic projection of the second light modulation part 122 on the light emitting structure 11, and includes:
the orthographic projection of the grain identification unit 13 on the light emitting structure 11 is completely overlapped with the orthographic projection of the second light modulation part 122 on the light emitting structure 11, and the area of the orthographic projection of the grain identification unit 13 on the light emitting structure 11 is equal to the area of the orthographic projection of the second light modulation part 122 on the light emitting structure 11.
The orthographic projection of the texture recognition unit 13 on the light-emitting structure 11 is completely overlapped with the orthographic projection of the second light modulation part 122 on the light-emitting structure 11, and the area of the orthographic projection of the second light modulation part 122 on the light-emitting structure 11 is larger than the area of the orthographic projection of the texture recognition unit 13 on the light-emitting structure 11.
The orthographic projection of the grain identification unit 13 on the light-emitting structure 11 is partially overlapped with the orthographic projection of the second light modulation part 122 on the light-emitting structure 11.
Here, in order to prevent the grain recognition unit 13 from being irradiated by the light emitted from the light emitting structure 11 as much as possible, optionally, an orthogonal projection of the grain recognition unit 13 on the light emitting structure 11 is completely overlapped with an orthogonal projection of the second light modulation part 122 on the light emitting structure 11.
In some embodiments, the non-subpixel areas 1012 may be grid-shaped; alternatively, the non-subpixel region 1012 may be a plurality of blocks or the like. Specifically, the arrangement of the sub-pixel area 1011.
Based on this, the second light modulation part 122 may also be in a grid shape, a plurality of block shapes, or the like, and the arrangement thereof is also related to the arrangement of the sub-pixel area 1011.
In some embodiments, as shown in fig. 1 and 2, the display device includes a plurality of sub-pixel regions including a red sub-pixel region, a green sub-pixel region, and a blue sub-pixel region. Alternatively, the plurality of sub-pixel regions include a magenta sub-pixel region, a yellow sub-pixel region, and a cyan sub-pixel region.
In addition, the plurality of sub-pixel regions may further include a white sub-pixel region.
In some embodiments, the use of the display device is not limited.
For example, the display device may be used as a mobile phone, a tablet computer, a Personal Digital Assistant (PDA), an in-vehicle computer, or the like.
In some embodiments, as shown in fig. 8, the structure of the display device is not limited, and the display device may include, for example, a frame 1, a display panel 2, a circuit board 3, a cover plate 4, and other electronic accessories including a camera and the like.
Taking the light emitting direction of the display device as top emission as an example, the frame 1 may be a U-shaped frame, and the display panel 2 and the circuit board 3 are disposed in the frame 1. The cover plate 4 is arranged on the light emitting side of the display panel 2, and the circuit board 3 is arranged on the side of the display panel 2 departing from the cover plate 4.
In some embodiments, the structure of the first dimming structure 12 is not limited, as long as at least the second dimming portion 122 can be made transparent in the texture detection stage; in the display stage, the first light modulation part 121 transmits light, and the second light modulation part 122 shields light.
The embodiment of the invention provides a display device, which comprises a light-emitting structure 11 and a plurality of line identification units 13 arranged on the light-emitting side of the light-emitting structure 11, and the service life of the line identification units can be greatly reduced by considering that the line identification units 13 are exposed to light for a long time when the display device displays. Based on this, in the embodiment of the present invention, the first dimming structure 12 is disposed between the light emitting structure 11 and the plurality of grain recognition units 13, and the first dimming layer 12 includes the first dimming portion 121 and the second dimming portion 122. The first dimming part 121 is located in the sub-pixel region 1011, the second dimming part 122 is located in the non-sub-pixel region, and the texture recognition unit 13 is also located in the non-sub-pixel region 1012. At the texture recognition stage, at least the second light modulation part 122 transmits light to ensure that the intensity of the reflected light which is irradiated to the finger, reflected by the finger and irradiated on the plurality of texture recognition units 13 is large enough to detect accurate fingerprint information; in the display stage, since the plurality of texture recognition units 13 and the second light modulation part 122 are both located in the non-sub-pixel region 1012, and the large-angle light passing through the first light modulation part 121 is very little and negligible, the problem that the plurality of texture recognition units 13 are in the illumination environment for a long time in the display stage can be improved by making the first light modulation part 121 pass light and the second light modulation part 122 shield light, thereby prolonging the service life of the plurality of texture recognition units 13.
Optionally, as shown in fig. 9, the display device further includes a second light modulation structure 14 disposed on a side of the plurality of texture recognition units 13 away from the first light modulation structure 12, where the second light modulation structure 14 is disposed in the non-sub-pixel region 1012; in the texture detection stage, the second dimming structure 14 transmits light; in the display phase, the second dimming structure 14 blocks light.
In some embodiments, the structure of the second light modulating structure 14 is not limited, as long as the second light modulating structure 14 transmits light during the texture detection stage; in the display stage, the second light adjusting structure 14 is only required to be shielded from light.
In the embodiment of the present invention, the second light modulation structure 14 is disposed on a side of the plurality of texture recognition units 13 away from the first light modulation structure 12, and the second light modulation structure 14 is located in the non-sub-pixel region 1012. In the texture detection stage, the second dimming structure 14 is transparent, so that the transmission of light rays is not influenced; in the display stage, ambient light may be prevented from being irradiated onto the plurality of grain recognition units 13, thereby increasing the life of the plurality of grain recognition units 13.
Alternatively, as shown in fig. 10, the first light modulation structure 12 includes, in the thickness direction of the display device, a first electrode layer, a first insulating layer 1212, a second electrode layer, and a first light modulation layer 1214, which are sequentially stacked; the first electrode layer comprises a plurality of first electrodes 1211 arranged at intervals, and the second electrode layer comprises a plurality of second electrodes 1213 arranged at intervals; the first electrodes 1211 correspond to the second electrodes 1213 one by one, and the orthographic projections of the first electrodes 1211 and the second electrodes 1213 corresponding thereto on the light emitting structure 11 are overlapped.
The first dimming layer 1214 includes a first dimming unit 2214 and a second dimming unit 2215; the first dimming unit 2214 is located in the sub-pixel region 1011, and the second dimming unit 2215 is located in the non-sub-pixel region 1012; each of the first and second dimming cells 2214 and 2215 corresponds to and directly contacts one of the first electrodes 1211, and the transmittance of the first and second dimming cells 2214 and 2215 is changed by a voltage between the first and second electrodes 1211 and 1213.
In the texture recognition stage, under the action of the voltage between the first electrode 1211 and the second electrode 1213, the transmittance of the first dimming unit 2214 can be controlled, so that the first dimming unit 2214 transmits light or blocks light, and further the first dimming part 121 transmits light or blocks light; under the action of the voltage between the first electrode 1211 and the second electrode 1213, the transmittance of the second dimming unit 2215 can be controlled, such that the second dimming unit 2215 transmits light, and thus the second dimming part 122 transmits light.
In the display phase, under the action of the voltage between the first electrode 1211 and the second electrode 1213, the transmittance of the first dimming unit 2214 can be controlled, such that the first dimming unit 2214 transmits light, and the first dimming part 121 transmits light; under the action of the voltage between the first electrode 1211 and the second electrode 1213, the transmittance of the second dimming unit 2215 may be controlled, so that the second dimming unit 2215 and, in turn, the second dimming part 122 are shielded from light.
In some embodiments, the second dimming part 122 may be a mesh or a plurality of blocks, etc. according to the arrangement of the sub-pixel regions 1011, and the second dimming unit 2215 may also be a mesh or a plurality of blocks, etc.
In some embodiments, the orthographic projection of the first electrode layer on the light emitting structure 11 may completely overlap with the orthographic projection of the second electrode layer on the light emitting structure 11; alternatively, the orthographic projection of the first electrode layer on the light emitting structure 11 may partially overlap the orthographic projection of the second electrode layer on the light emitting structure 11.
In the embodiment of the present invention, the transmittances of the first and second dimming units 2214 and 2215 are adjusted by the voltage, so that the first and second dimming parts 121 and 122 transmit light or block light, and the operation is simple and easy to implement.
As shown in fig. 10, the second light modulating structure 14 includes a third electrode layer 141, a second insulating layer 142, a fourth electrode layer 143, and a second light modulating layer 144, which are sequentially stacked in a thickness direction of the display device, and the second light modulating layer 144 is in direct contact with the fourth electrode layer 143; the transmittance of the second light modulation layer 144 changes by the voltage between the third electrode layer 141 and the fourth electrode layer 143.
In the texture recognition stage, under the action of the voltage between the third electrode layer 141 and the fourth electrode layer 143, the transmittance of the second light modulation layer 144 may be controlled, so that the second light modulation layer 144 transmits light.
In the display stage, the transmittance of the second light modulation layer 144 can be controlled by a voltage between the third electrode layer 141 and the fourth electrode layer 143, so that the second light modulation layer 144 blocks light.
In some embodiments, since the second light modulation structure 14 is only located in the non-sub-pixel region 1012, the second light modulation structure 14 may be in a grid shape or a plurality of block shapes, and the like, according to the arrangement of the sub-pixel region 1011, and further, the shape of the second light modulation layer 144 may also be in a grid shape or a plurality of block shapes, and the like.
In an example, if the second light modulation layer 144 has a mesh shape, the third electrode layer 141 and the fourth electrode layer 143 may have a mesh shape or a block shape; when the second light modulation layer 144 has a plurality of block shapes, the third electrode layer 141 and the fourth electrode layer 143 also have a plurality of block shapes.
In some embodiments, an orthographic projection of the third electrode layer 141 on the light emitting structure 11 may completely overlap with an orthographic projection of the fourth electrode layer 143 on the light emitting structure 11; alternatively, the orthographic projection of the third electrode layer 141 on the light emitting structure 11 may partially overlap the orthographic projection of the fourth electrode layer 143 on the light emitting structure 11.
In the embodiment of the present invention, the transmittance of the second dimming layer 144 is adjusted under the action of voltage, so that the second dimming structure 14 transmits light or blocks light, and the operation is simple and easy to implement.
Alternatively, the materials of the first dimming layer 1214 and the second dimming layer 144 include electroluminescent materials or blue phase liquid crystals.
The electroluminescent material may be, for example, zinc sulfide (ZnS), among others.
Optionally, in the texture detection stage, the first dimming part 121 adjacent to any one of the light-transmitting first dimming parts 121 is light-shielded.
In some embodiments, one or more light-shielding first light modulation parts 121 may be included between two adjacent light-transmitting first light modulation parts 121.
In some embodiments, the same first light modulation part 121 may be switched from light transmission to light shielding or from light shielding to light transmission during a primary texture detection stage.
In the embodiment of the present invention, if all the first light modulation part 121 and the second light modulation part 122 are transparent, the problem of blurred imaging due to light mixing may be considered, and the accuracy of texture recognition may be affected. Therefore, in the embodiment of the invention, under the condition that the second light modulation part 122 is transparent, the first light modulation part 121 adjacent to any one of the transparent first light modulation parts 121 is made to shield light, so that the problem of light mixing can be improved, and the accuracy of texture recognition can be improved. Alternatively, as shown in fig. 11, the display device is a self-light emitting display device; the area of the grain identification area 101 is equal to the area of the display area 100; the light emitted from the light emitting device 111 is white light; the display apparatus further includes a color filter layer provided on the display side of the light emitting device 11, the color filter layer 15 including a plurality of color resist units provided at intervals; the orthographic projection of the second dimming part 122 on the color filter layer 15 is positioned between the adjacent color resist units; in the display stage, the second light modulation section 122 is multiplexed as a black matrix in the display device.
Here, it should be known to those skilled in the art that the black matrix should be located in the entire non-pixel region 1012, and thus, the second dimming part 122 serving as the black matrix is also located in the entire non-pixel region 1012.
In some embodiments, the color filter layer 15 may be located on a side of the first light adjusting structure 12 close to the light emitting structure 11, or on a side of the first light adjusting structure 12 away from the light emitting structure 11.
In some embodiments, the color filter layer 15 may be disposed on the array substrate of the self-luminous display device, or may be disposed on the encapsulation layer of the self-luminous display device.
In the embodiment of the present invention, in the case where light emitted from the light emitting device 11 of the self-luminous display apparatus is white light, a color filter layer and a black matrix are provided in the self-luminous display apparatus. Since the second light modulation part 122 is shielded from light during the display period, the second light modulation part 122 can be reused as a black matrix to simplify the manufacturing process of the self-luminous display device when the area of the texture recognition area 101 is equal to the area of the display area 100.
Alternatively, as shown in fig. 12, the display device is a liquid crystal display device; the area of the grain identification area 101 is equal to the area of the display area 100; in the display stage, the second light modulation section 122 is multiplexed as a black matrix in the liquid crystal display device.
Here, as those skilled in the art will appreciate, the light emitted from the backlight is white light, and the display panel 2 includes a color filter layer and a black matrix. The black matrix should be located in the entire non-pixel area 1012, and thus, the second light-adjusting part 122 serving as the black matrix is also located in the entire non-pixel area 1012.
In some embodiments, the color filter layer 15 may be located on a side of the first light adjusting structure 12 close to the light emitting structure 11, or on a side of the first light adjusting structure 12 away from the light emitting structure 11.
In some embodiments, the color filter layer 15 may be disposed on the array substrate of the liquid crystal display device, and may also be disposed on the opposite-box substrate of the liquid crystal display device.
In the prior art, due to the existence of the black matrix, the texture recognition unit 13 is difficult to be integrated in the liquid crystal display device so as to realize texture detection; even if the texture identifying unit 13 is disposed in the sub-pixel region 1011, there is a problem that the texture identifying unit 13 blocks light, thereby affecting the display effect of the liquid crystal display device.
Therefore, in the embodiment of the invention, the liquid crystal display device is internally provided with the color filter layer and the black matrix. In the embodiment of the invention, the second light modulation part 122 shields light in the display stage, and can be used as a black matrix to simplify the manufacturing process of the liquid crystal display device; at the texture detection stage, the second light modulation part 122 transmits light, so that fingerprint identification can be performed, and the problem that the texture identification unit cannot be integrated in the liquid crystal display device in the prior art is solved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims (10)

1. A display device is characterized by comprising a display area, wherein the display area comprises a line identification area; the texture recognition area comprises a plurality of sub-pixel areas and non-sub-pixel areas positioned between the adjacent sub-pixel areas;
the display device comprises a light-emitting structure, a first dimming structure arranged on the light-emitting side of the light-emitting structure and a plurality of line identification units arranged at intervals, wherein the line identification units are positioned on one side of the first dimming structure, which is far away from the light-emitting structure; the plurality of line identification units are positioned in the non-sub-pixel area;
the first dimming structure comprises a first dimming part and a second dimming part, the first dimming part is located in the sub-pixel area, the second dimming part is located in the non-sub-pixel area, and the orthographic projection of the grain identification unit on the light-emitting structure is overlapped with the orthographic projection of the second dimming part on the light-emitting structure;
at the texture detection stage, at least the second dimming part is transparent;
in the display stage, the first dimming portion transmits light, and the second dimming portion blocks light.
2. The display device according to claim 1, further comprising a second dimming structure disposed on a side of the plurality of texture recognition units facing away from the first dimming structure, wherein the second dimming structure is disposed in the non-sub-pixel region, and an orthographic projection of the second dimming structure on the light emitting structure covers an orthographic projection of the plurality of texture recognition units on the light emitting structure;
in the texture detection stage, the second dimming structure is transparent;
and in the display stage, the second dimming structure shades light.
3. The display device according to claim 2, wherein the first light adjustment structure includes a first electrode layer, a first insulating layer, a second electrode layer, and a first light adjustment layer, which are stacked in this order, in a thickness direction of the display device;
the first electrode layer comprises a plurality of first electrodes arranged at intervals, and the second electrode layer comprises a plurality of second electrodes arranged at intervals; the first electrodes correspond to the second electrodes one to one, and orthographic projections of the first electrodes and the second electrodes corresponding to the first electrodes on the light-emitting structures are overlapped;
the first dimming layer comprises a first dimming unit and a second dimming unit; the first dimming unit is located in the sub-pixel region, and the second dimming unit is located in the non-sub-pixel region; each first dimming unit and each second dimming unit correspond to and are in direct contact with one second electrode, and under the action of voltage between the first electrode and the second electrode, light transmittance of the first dimming unit and the second dimming unit changes;
the second dimming structure comprises a third electrode layer, a second insulating layer, a fourth electrode layer and a second dimming layer which are sequentially stacked along the thickness direction of the display device, and the second dimming layer is in direct contact with the fourth electrode layer;
the transmittance of the second light modulation layer changes by a voltage between the third electrode layer and the fourth electrode layer.
4. A display device according to claim 3, wherein the materials of the first and second dimming layers comprise electroluminescent materials or blue phase liquid crystals.
5. The display device of claim 1, wherein the area of the texture recognition region is smaller than the area of the display region.
6. The display device according to any one of claims 1 to 5, wherein the first dimming portion transmits light during the texture detection stage.
7. The display device according to any one of claims 1 to 5, wherein in the streak detection stage, the first dimming portion adjacent to any one of the first dimming portions that transmits light is shielded from light.
8. The display device according to any one of claims 1 to 5, wherein the display device is a self-light emitting display device;
the light emitting structure includes a plurality of light emitting devices.
9. The display device according to claim 8, wherein the area of the grain recognition region is equal to the area of the display region;
the light emitted by the light-emitting device is white light; the display device further comprises a color filter layer arranged on the display side of the light-emitting device, wherein the color filter layer comprises a plurality of color resistance units arranged at intervals; the orthographic projection of the second light adjusting part on the color filter layer is positioned between the adjacent color resistance units;
in the display phase, the second dimming part is reused as a black matrix in the display device.
10. The display device according to any one of claims 1 to 5, wherein the display device is a liquid crystal display device; the area of the line identification area is equal to the area of the display area;
in the display phase, the second dimming part is reused as a black matrix in the liquid crystal display device.
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