WO2021254099A1 - 显示装置及其驱动方法 - Google Patents

显示装置及其驱动方法 Download PDF

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Publication number
WO2021254099A1
WO2021254099A1 PCT/CN2021/095428 CN2021095428W WO2021254099A1 WO 2021254099 A1 WO2021254099 A1 WO 2021254099A1 CN 2021095428 W CN2021095428 W CN 2021095428W WO 2021254099 A1 WO2021254099 A1 WO 2021254099A1
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WIPO (PCT)
Prior art keywords
light
substrate
display panel
pattern recognition
emitting
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PCT/CN2021/095428
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English (en)
French (fr)
Inventor
杨心澜
穆文凯
刘屹
王世君
樊君
冯博
王洋
魏旃
丁腾飞
Original Assignee
京东方科技集团股份有限公司
北京京东方显示技术有限公司
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Publication of WO2021254099A1 publication Critical patent/WO2021254099A1/zh

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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
    • 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
    • G02F1/1335—Structural association of cells with optical devices, e.g. polarisers or reflectors
    • G02F1/1336—Illuminating devices
    • 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
    • G02F1/1343—Electrodes
    • 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

Definitions

  • the present disclosure relates to the technical field of pattern recognition, and in particular to a display device and a driving method thereof.
  • An embodiment of the present disclosure provides a display device, the display device includes:
  • a display panel in which a plurality of photosensitive devices for pattern recognition are arranged
  • the pattern recognition light-emitting substrate is located on the light-emitting side of the display panel, and the pattern recognition light-emitting substrate includes a substrate, an electroluminescent point light source provided on one side of the substrate and corresponding to each photosensitive device.
  • the display panel includes: an array substrate and a counter substrate arranged opposite to each other, and a liquid crystal layer located between the array substrate and the counter substrate;
  • the pattern recognition light-emitting substrate is located on a side of the counter substrate away from the liquid crystal layer;
  • the display device further includes: a backlight module located on a side of the display panel away from the pattern recognition light-emitting substrate.
  • the display panel includes: a driving substrate, and an electroluminescent device located on one side of the driving substrate;
  • the pattern recognition light-emitting substrate is located on the light-emitting side of the electroluminescent device.
  • the display panel is divided into a plurality of sub-pixels arranged in an array
  • the orthographic projection of the electroluminescent point light source on the display panel falls within the range of the orthographic projection of the display panel in the gap between the sub-pixels.
  • the pattern of the front projection of the gap between the sub-pixels on the display panel is a grid pattern, and the front projection of the electroluminescent point light source on the display panel is located in the grid pattern The location of the outlets.
  • the electroluminescent point light source includes: a first electrode, a light-emitting functional layer, and a second electrode that are sequentially stacked on the substrate;
  • the orthographic projection of the light-emitting function layer on the substrate falls within the range of the orthographic projection of the display panel in the gap between the sub-pixels.
  • the first electrode and/or the second electrode are light-shielding electrodes
  • the orthographic projection of the light-shielding electrode on the substrate falls into the gap between the sub-pixels within the scope of the orthographic projection of the display panel.
  • the second electrode has a first opening
  • the orthographic projection of the light-emitting function layer on the substrate covers the orthographic projection of the first opening on the substrate.
  • the first electrode has a second opening
  • the orthographic projection of the light-emitting function layer on the substrate covers the orthographic projection of the second opening on the substrate.
  • the wavelength range of the light emitted by the electroluminescent point light source does not overlap with the wavelength range of the light emitted by the display panel.
  • the display panel emits visible light
  • the electroluminescent point light source emits infrared light
  • both the electroluminescent point light source and the display panel emit visible light.
  • An embodiment of the present disclosure provides a method for driving a display device, the method includes:
  • the electroluminescent point light source in the pattern recognition light-emitting substrate is controlled to emit light, and the signal fed back by the photosensitive device is collected to perform pattern recognition.
  • control the display panel When it is determined to perform pattern recognition, control the display panel to stop emitting light
  • the electroluminescent point light source in the pattern recognition light-emitting substrate is controlled to stop emitting light, and at the same time, the display panel is controlled to emit light.
  • the wavelength range of the light emitted by the pattern identifying the light-emitting substrate does not overlap with the wavelength range of the light emitted by the display panel, and the method further includes:
  • the display panel While controlling the electroluminescent point light source in the pattern recognition light-emitting substrate to emit light, the display panel is controlled to keep emitting light.
  • FIG. 1 is a schematic structural diagram of a display device provided by an embodiment of the disclosure
  • FIG. 3 is a schematic structural diagram of yet another display device provided by an embodiment of the present disclosure.
  • FIG. 4 is a schematic structural diagram of another display device provided by an embodiment of the disclosure.
  • FIG. 5 is a projection view of a light-emitting substrate for pattern recognition in a display device provided by an embodiment of the disclosure
  • FIG. 6 is a cross-sectional view of AA' in FIG. 5 provided by an embodiment of the disclosure.
  • FIG. 7 is another cross-sectional view of AA' in FIG. 5 provided by an embodiment of the disclosure.
  • FIG. 8 is a top view of a first electrode provided by an embodiment of the disclosure.
  • FIG. 9 is a projection view of a light-emitting substrate for pattern recognition in another display device provided by an embodiment of the disclosure.
  • FIG. 10 is a cross-sectional view of BB' in FIG. 9 provided by an embodiment of the disclosure.
  • FIG. 11 is another cross-sectional view of BB' in FIG. 9 provided by an embodiment of the disclosure.
  • FIG. 12 is another cross-sectional view of BB' in FIG. 9 provided by an embodiment of the disclosure.
  • FIG. 13 is a schematic diagram of a driving method of a display device according to an embodiment of the disclosure.
  • fingerprint recognition collects the reflected light of finger fingerprints obtained after irradiation by an optical fingerprint acquisition device, transmits it to the light receiving unit, receives the reflected light of the finger fingerprint transmitted by the optical fingerprint acquisition device, and generates a fingerprint image based on the reflected light
  • the data is transmitted to the information processing unit for receiving fingerprint image data and generating fingerprint identification information based on the fingerprint image data.
  • fingerprint recognition is easily interfered by the background light of the display product, and the fingerprint signal resolution is low, and signal interference between fingerprint valleys and ridges is prone to occur, which affects the effect of fingerprint recognition and the reliability of fingerprint recognition.
  • the display device includes: a display panel 1, and a pattern recognition light-emitting substrate 2 on the light-emitting side of the display panel 1;
  • a plurality of photosensitive devices 7 for pattern recognition are arranged in the display panel 1;
  • the pattern recognition light-emitting substrate 2 includes a substrate and an electroluminescent point light source provided on the substrate and corresponding to each photosensitive device.
  • the photosensitive device can be arranged in a one-to-one correspondence with the electroluminescent point light source.
  • the principle of the pattern recognition of the display device is as follows: because the skin surface has uneven ridges and valleys, when the pattern is recognized, the light emitted by the electroluminescent point light source irradiates the positions of the ridges and valleys of the pattern and is reflected to the position of the ridges and valleys.
  • the intensity of the light that reaches the photosensitive device after being reflected by the ridge and valley positions is not equal. Therefore, the difference in the current signal output by each photosensitive device can be collected by detecting the difference in the current signal output by each photosensitive device when the pattern touches the surface of the display device. Obtain a two-dimensional pattern composed of ridges and valleys, so as to realize the pattern recognition.
  • the display device provided by the embodiment of the present disclosure is separately provided with a pattern recognition light-emitting substrate for pattern recognition, and the pattern recognition light-emitting substrate includes an electroluminescent point light source, that is, the light source used for pattern recognition is a point light source, which can enhance the pattern Recognizing the luminous flux emitted by the light-emitting substrate, so that the light emitted by the point light source reaches the pattern and then is reflected to the photosensitive device, which can reduce the signal interference between the valley and the ridge of the pattern.
  • the point light source can provide large-angle light, which can enhance the difference in the reflected light signal of the ridge and valley ridges, and improve the sensitivity of the ridge recognition, the effect of the ridge recognition, and the accuracy of the ridge recognition.
  • the texture can be, for example, a fingerprint, or a master or other texture with ridges and valleys.
  • the pattern recognition light-emitting substrate may be a passive electroluminescent substrate.
  • the display panel 1 includes: an array substrate 3 and a counter substrate 4 arranged oppositely, and an array substrate 3 and a counter substrate 4 4 between the liquid crystal layer 5;
  • the pattern recognition light-emitting substrate 2 is located on the side of the counter substrate 4 away from the liquid crystal layer 5;
  • the display panel 1 may be a liquid crystal display panel.
  • a photosensitive device 7 is provided on the side of the counter substrate 4 facing the array substrate 3.
  • a photosensitive device 7 can also be provided on the side of the counter substrate 4 facing away from the array substrate 3.
  • the array substrate 3 may include, for example, a first base substrate and a thin film transistor pixel circuit formed on the first base substrate.
  • the thin film transistor pixel circuit includes, for example, gate lines, data lines, thin film transistors, and pixel electrodes. Wait.
  • the thin film transistor includes a gate, a gate insulating layer, an active layer, a source and a drain.
  • the counter substrate may include, for example, a second base substrate, a color resist, a black matrix, spacers, etc. formed on the second base substrate.
  • the common electrode of the display panel can be arranged in the array substrate or in the opposite substrate.
  • the display panel 1 includes: a driving substrate 8 and an electroluminescent device 9 located on the driving substrate 8;
  • the pattern recognition light-emitting substrate is located on the light-emitting side of the electroluminescent device.
  • the electroluminescent device 9 includes an anode 10, an electroluminescent functional layer 11, and a cathode 12.
  • the display panel may also include an encapsulation layer 13 on the side of the electroluminescent device 9 facing away from the driving substrate 8.
  • FIG. 2 shows only one electroluminescent device to illustrate the display device provided by the embodiment of the present disclosure.
  • the pixel definition layer is also included between the electroluminescent devices.
  • the photosensitive device may be arranged on the side of the encapsulation layer facing away from the electroluminescent device, for example.
  • the electroluminescent device may be, for example, an organic light emitting diode, or a quantum dot light emitting diode.
  • the driving substrate may include, for example, a third base substrate and a thin film transistor pixel circuit formed on the third base substrate.
  • the thin film transistor pixel circuit includes, for example, gate lines, data lines, thin film transistors, and the like.
  • the anode of the electroluminescent device is electrically connected with the driving thin film transistor in the thin film transistor pixel circuit.
  • the photosensitive device may include: a photosensitive electrode, and a thin film transistor electrically connected to the photosensitive electrode.
  • the photosensitive electrode is electrically connected to the source electrode or the drain electrode of the thin film transistor.
  • the photosensitive device may include: a photosensitive diode, and a thin film transistor electrically connected to the photosensitive diode.
  • the photodiode may include, for example, a photosensitive layer, two electrodes in contact with the photosensitive layer and mutually insulating layers, one of the two electrodes is electrically connected to the source electrode or the drain electrode of the thin film transistor.
  • the display panel is divided into sub-pixels 14 arranged in an array
  • the front projection of the electroluminescent point light source 16 on the display panel falls into the gap 15 between the sub-pixels 14 within the range of the front projection of the display panel.
  • the electroluminescent point light source may be arranged in a region corresponding to the black matrix of the display panel, for example.
  • the pattern of the orthographic projection of the gap 15 between the sub-pixels 14 on the display panel is a grid pattern
  • the electroluminescent point light source 16 is displaying
  • the orthographic projection of the panel is located at the dots of the grid pattern.
  • the electroluminescent point light source can also be arranged at other positions in the gap between the sub-pixels.
  • the electroluminescent point light source includes: a first electrode, a light-emitting function layer, and a second electrode that are sequentially stacked on a substrate;
  • the orthographic projection of the light-emitting function layer on the substrate falls into the gap between the sub-pixels within the scope of the orthographic projection of the display panel.
  • the light-emitting functional layer of each electroluminescent point light source is discontinuous, and the material of the light-emitting functional layer is deposited only in a small area, that is, the material of the light-emitting functional layer is deposited in dots, and the The shape design of the first electrode and the second electrode realizes a large-angle point light source.
  • the first electrode and/or the second electrode are light-shielding electrodes; Within the range of the orthographic projection, the shading electrode will not affect the display effect of the display panel.
  • first electrodes in different electroluminescent point light sources can be connected in series
  • second electrodes in different electroluminescent point light sources can be connected in series
  • the first electrode 17 and the second electrode 18 cross vertically and horizontally to form a grid pattern; the light-emitting function layer 19 is located on the grid formed by the first electrode 17 and the second electrode 18. At the dot position of the pattern pattern.
  • the pattern of the overlapping area of the second electrode and the light-emitting function layer is a closed pattern without openings.
  • the second electrode 18 is a strip electrode.
  • FIG. 5 is a projection view of the first electrode, the second electrode, and the light-emitting function layer in the light-emitting substrate for pattern recognition on the substrate 22.
  • the first electrode 17 is also a strip-shaped electrode, and the cross section along AA' in FIG. 5 can be as shown in FIG. 6, for example.
  • the cross section along AA' in FIG. 5 may also be as shown in FIG. 7, and the first electrode 17 has a second opening 21.
  • the top view of the first electrode 17 may be as shown in FIG. 8, for example.
  • the area of the light-emitting function layer may be larger than the area of the second electrode covering the light-emitting function layer, or it may be equal to the area of the second electrode covering the light-emitting function layer, which can be selected according to actual needs in specific implementation.
  • the second electrode 18 has a first opening 20;
  • the orthographic projection of the light-emitting functional layer 19 on the substrate 22 covers the orthographic projection of the first opening 20 on the substrate.
  • the area corresponding to the first opening is the light-transmitting area of the electroluminescent point light source.
  • FIG. 9 is a projection view of the first electrode, the second electrode, and the light-emitting function layer in the light-emitting substrate for pattern recognition on the substrate 22.
  • the first electrode may be a strip electrode, and the cross section along BB' in FIG. 9 may be as shown in FIG. 10, for example.
  • the first electrode 17 has a second opening 21, and the cross-section along BB' in FIG. 9 may also be as shown in FIG. 11.
  • the top view of the first electrode 17 may be as shown in FIG. 8, for example.
  • the pattern recognition light-emitting substrate includes 4 electroluminescent point light sources as an example for illustration.
  • the number of light-emitting point light sources and photosensitive devices can be selected according to actual needs.
  • the electrodes and the light-emitting layer in the electroluminescent point light source can be directly fabricated on the second substrate of the counter substrate, that is, the substrate of the pattern recognition light-emitting substrate can be The second base substrate of the counter substrate is multiplexed. Therefore, the thickness of the display device can be reduced, and the cost can be saved.
  • the wavelength range of light emitted by the electroluminescent point light source does not overlap with the wavelength range of light emitted by the display panel.
  • the photosensitive wavelength of the photosensitive device corresponds to the wavelength range of the light emitted by the electroluminescent point light source.
  • the addition of the photosensitive device can distinguish between the light emitted by the electroluminescent point light source and the light emitted by the display panel. The light emitted by the display panel will not affect the lines. Identify the impact.
  • the display panel emits visible light
  • the electroluminescent point light source emits infrared light
  • the material of the light-emitting functional layer in the electroluminescent point light source is a material whose emission spectrum is in the infrared region.
  • the photosensitive device is an infrared photosensitive device.
  • the electroluminescent point light source emits infrared light, and the light emitted by the electroluminescent point light source does not affect the normal display of the display device, and can also perform distance measurement and body temperature measurement, enriching the functions of the display device.
  • both the electroluminescent point light source and the display panel emit visible light.
  • the luminescent material of the light-emitting functional layer in the electroluminescent point light source, and the luminescent material of the backlight module or the luminescent material of the electroluminescent device can be selected according to the actual wavelength range of the emitted light.
  • embodiments of the present disclosure also provide a driving method for the above-mentioned display device. As shown in FIG. 13, the method includes:
  • the electroluminescent point light source when pattern recognition is required, the electroluminescent point light source is controlled to emit light.
  • the light emitted by the electroluminescent point light source reaches the pattern and then is reflected to the photosensitive device.
  • the point light source can provide a large angle Therefore, the difference between the reflected light signals of the ridges and valleys received by the photosensitive device can be enhanced, and the sensitivity of the ridge recognition, the effect of the ridge recognition, and the accuracy of the ridge recognition can be improved.
  • the pattern recognition light-emitting substrate and the display panel both emit visible light
  • the method further includes:
  • the control display panel stops emitting light
  • the electroluminescent point light source in the pattern recognition light-emitting substrate is controlled to stop emitting light, and at the same time, the display panel is controlled to emit light.
  • the pattern recognition light-emitting substrate and the display panel both emit visible light
  • the pattern recognition and display are driven in a time-sharing manner. Therefore, the pattern recognition will not affect the normal display of the display device, and the interference of the display panel backlight on the pattern recognition can also be eliminated during the pattern recognition process.
  • the pattern identifying the wavelength range of the light emitted by the light-emitting substrate does not overlap with the wavelength range of the light emitted by the display panel, and the method further includes:
  • the control pattern recognizes the electroluminescent point light source in the light-emitting substrate to emit light while controlling the display panel to keep emitting light.
  • the wavelength range of light emitted by the pattern recognition light-emitting substrate and the wavelength range of light emitted by the display panel do not overlap each other, the light emitted by the display panel will not interfere with the pattern recognition, and the display panel can keep emitting light during the pattern recognition stage. That is to realize the sub-band driving of the pattern recognition light emission and the display light emission.
  • the display device and the driving method provided by the embodiments of the present disclosure separately provide a pattern recognition light-emitting substrate for pattern recognition
  • the pattern recognition light-emitting substrate includes an electroluminescent point light source, that is, a light source for pattern recognition It is a point light source that can enhance the luminous flux emitted by the light-emitting substrate for pattern recognition, so that the light emitted by the point light source reaches the pattern and is reflected to the photosensitive device, which can reduce the signal interference between the valley ridges of the pattern, and the point light source can provide large-angle light, thereby It can enhance the difference of the reflected light signal of the ridge and valley ridge, and improve the sensitivity of the pattern recognition, the effect of the pattern recognition and the accuracy of the pattern recognition.

Abstract

一种显示装置，包括：显示面板（1）及位于其出光侧的纹路识别发光基板（2）；显示面板（1）内设置多个用于纹路识别的光敏器件（7），纹路识别发光基板（2）包括衬底及设置在衬底上且与各光敏器件（7）对应的电致发光点光源（16）。显示装置的驱动方法，确定是否进行纹路识别，并当确定进行纹路识别时，控制纹路识别发光基板中的电致发光点光源（16）发光，采集光敏器件（7）反馈的信号，进行纹路识别，且通过设置电致发光点光源（16）以及显示面板（1）出射光的类型，在进行纹路识别时控制显示面板（1）停止发光或是保持发光。通过将用于纹路识别的光源设为点光源，降低了纹路谷脊之间的信号窜扰，提高纹路识别的效果及可靠性。

Description

显示装置及其驱动方法
相关申请的交叉引用
本公开要求在2020年06月17日提交中国专利局、申请号为202010552384.3、申请名称为“一种显示装置及其驱动方法”的中国专利申请的优先权，其全部内容通过引用结合在本公开中。
技术领域
本公开涉及纹路识别技术领域，尤其涉及一种显示装置及其驱动方法。
背景技术
随着显示技术的飞速发展，目前，具有指纹识别功能的显示产品已经逐渐遍及。
发明内容
本公开实施例提供的一种显示装置，所述显示装置包括：
显示面板，所述显示面板内设置多个用于纹路识别的光敏器件；
纹路识别发光基板，位于所述显示面板的出光侧，所述纹路识别发光基板包括：衬底，设置在所述衬底一侧且与各所述光敏器件对应的电致发光点光源。
可选地，所述显示面板包括：相对设置的阵列基板和对向基板，以及位于所述阵列基板和所述对向基板之间的液晶层；
在对向基板面向所述阵列基板的一侧设置所述光敏器件；
所述纹路识别发光基板位于所述对向基板背离所述液晶层的一侧；
所述显示装置还包括：位于所述显示面板背离所述纹路识别发光基板一侧的背光模组。
可选地，所述显示面板包括：驱动基板，以及位于所述驱动基板一侧的 电致发光器件；
所述纹路识别发光基板位于所述电致发光器件的出光侧。
可选地，所述显示面板划分为阵列排布的多个子像素；
所述电致发光点光源在所述显示面板的正投影，落入所述子像素之间间隙处在所述显示面板的正投影所在范围内。
可选地，所述子像素之间间隙在所述显示面板的正投影的图案为网格型图案，所述电致发光点光源在所述显示面板的正投影，位于所述网格型图案的网点位置处。
可选地，所述电致发光点光源包括：在所述衬底上依次堆叠设置的第一电极、发光功能层和第二电极；
所述发光功能层在所述衬底的正投影，落入所述子像素之间间隙处在所述显示面板的正投影所在范围内。
可选地，所述第一电极和/或所述第二电极为遮光电极；
所述遮光电极在所述衬底的正投影，落入所述子像素之间间隙处在所述显示面板的正投影所在范围内。
可选地，所述第二电极具有第一开口；
所述发光功能层在所述衬底的正投影，覆盖所述第一开口在所述衬底的正投影。
可选地，所述第一电极具有第二开口；
所述发光功能层在所述衬底的正投影，覆盖所述第二开口在所述衬底的正投影。
可选地，所述电致发光点光源出射光的波长范围，与所述显示面板出射光的波长范围互不重叠。
可选地，所述显示面板出射可见光，所述电致发光点光源出射红外光。
可选地，所述电致发光点光源与所述显示面板均出射可见光。
本公开实施例提供的一种显示装置的驱动方法，所述方法包括：
确定是否进行纹路识别；
当确定进行纹路识别时，控制所述纹路识别发光基板中的电致发光点光源发光，并采集所述光敏器件反馈的信号，进行纹路识别。
可选地，所述纹路识别发光基板与所述显示面板均出射可见光，所述方法还包括：
当确定进行纹路识别时，控制所述显示面板停止发光；
当确定完成纹路识别时，控制所述纹路识别发光基板中的电致发光点光源停止发光，同时控制所述显示面板发光。
可选地，所述纹路识别发光基板出射光的波长范围，与所述显示面板出射光的波长范围互不重叠，所述方法还包括：
控制所述纹路识别发光基板中的电致发光点光源发光的同时，控制所述显示面板保持发光。
附图说明
图1为本公开实施例提供的一种显示装置的结构示意图；
图2为本公开实施例提供的另一种显示装置的结构示意图；
图3为本公开实施例提供的又一种显示装置的结构示意图；
图4为本公开实施例提供的又一种显示装置的结构示意图；
图5为本公开实施例提供的一种显示装置中纹路识别发光基板的投影图；
图6为本公开实施例提供的一种图5中AA’的截面图；
图7为本公开实施例提供的另一种图5中AA’的截面图；
图8为本公开实施例提供的一种第一电极的俯视图；
图9为本公开实施例提供的另一种显示装置中纹路识别发光基板的投影图；
图10为本公开实施例提供的一种图9中BB’的截面图；
图11为本公开实施例提供的又一种图9中BB’的截面图；
图12为本公开实施例提供的又一种图9中BB’的截面图；
图13为本公开实施例提供的一种显示装置的驱动方法的示意图。
具体实施方式
相关技术中，指纹识别通过光学指纹采集装置采集照射后获得的手指指纹反射光，传输至光接收单元，接收由光学指纹采集装置传输出的手指指纹的反射光，并根据该反射光生成指纹图像数据，并传输到信息处理单元，用于接收指纹图像数据，根据指纹图像数据生成指纹识别信息。然而进行指纹识别时容易受到显示产品背景光干扰，指纹信号分辨能力低，容易出现指纹谷脊之间的信号窜扰，影响指纹识别的效果以及指纹识别可靠性。
为使本公开实施例的目的、技术方案和优点更加清楚，下面将结合本公开实施例的附图，对本公开实施例的技术方案进行清楚、完整地描述。附图中各膜层的厚度和形状不反映真实比例，目的只是示意说明本公开内容。显然，所描述的实施例是本公开的一部分实施例，而不是全部的实施例。基于所描述的本公开实施例，本领域普通技术人员在无需创造性劳动的前提下所获得的所有其它实施例，都属于本公开保护的范围。
除非另作定义，此处使用的技术术语或者科学术语应当为本公开所属领域内具有一般技能的人士所理解的通常意义。本公开说明书以及权利要求书中使用的“第一”、“第二”以及类似的词语并不表示任何顺序、数量或者重要性，而只是用来区分不同的组成部分。“包括”或者“包含”等类似的词语意指出现该词前面的元件或者物件涵盖出现在该词后面列举的元件或者物件及其等同，而不排除其他元件或者物件。“内”、“外”、“上”、“下”等仅用于表示相对位置关系，当被描述对象的绝对位置改变后，则该相对位置关系也可能相应地改变。
本公开实施例提供了一种显示装置，如图1所示，显示装置包括：显示面板1，位于显示面板1出光侧的纹路识别发光基板2；
显示面板1内设置多个用于纹路识别的光敏器件7；
纹路识别发光基板2包括：衬底，设置在衬底上且与各光敏器件对应的电致发光点光源。具体地，光敏器件可以和电致发光点光源一一对应设置。
本公开实施例提供的显示装置纹路识别的原理如下：由于皮肤表面具有 凹凸不平的脊和谷，在进行纹路识别时，电致发光点光源发出的光照射到纹路脊和谷的位置并反射到光敏器件，由脊和谷位置反射后到达光敏器件的光的强度不相等，因此可以通过检测在纹路碰触到显示装置表面的过程中，采集各光敏器件输出的电流信号大小差异，根据电流信号获得纹路脊和谷构成的纹路二维图样，从而实现纹路识别。
本公开实施例提供的显示装置，单独设置用于进行纹路识别的纹路识别发光基板，并且该纹路识别发光基板包括电致发光点光源，即用于进行纹路识别的光源为点光源，可以增强纹路识别发光基板发射光通量，从而点光源发出的光到达纹路再被反射到光敏器件，可以降低纹路谷脊之间的信号窜扰。并且，点光源可以提供大角度光，从而可以增强纹路谷脊反射光信号差异，提高纹路识别的灵敏度、纹路识别的效果以及纹路识别准确度。
在实际应用中，纹路例如可以是指纹，也可以是掌握或其他具有脊和谷的纹路。
在实际应用中，纹路识别发光基板可以是无源电致发光基板。
可选地，在本公开实施例提供的显示装置中，如图1和图2所示，显示面板1包括：相对设置的阵列基板3和对向基板4，以及位于阵列基板3和对向基板4之间的液晶层5；
纹路识别发光基板2位于对向基板4背离液晶层5的一侧；
显示装置还包括：位于显示面板1背离纹路识别发光基板2一侧的背光模组6。
具体地，在本公开实施例提供的如图2所示的显示装置中，显示面板1可以为液晶显示面板。
可选地，如图2所示，在本公开实施例提供的显示装置中，在对向基板4面向阵列基板3的一侧设置光敏器件7。
当然，可选地，也可以在对向基板4背离阵列基板3的一侧设置光敏器件7。
在具体实施时，阵列基板3例如可以包括第一衬底基板，以及在第一衬 底基板上形成的薄膜晶体管像素电路，薄膜晶体管像素电路例如包括：栅线、数据线、薄膜晶体管以及像素电极等。薄膜晶体管包括：栅极、栅绝缘层、有源层、源极和漏极。对向基板例如可以包括：第二衬底基板，在第二衬底基板上形成的彩色色阻、黑矩阵、隔垫物等。显示面板的公共电极可以设置于阵列基板中也可以设置于对向基板中。
当然，在本公开实施例提供的显示装置中，显示面板也可以是电致发光显示面板。
可选地，在本公开实施例提供的显示装置中，如图3所示，显示面板1包括：驱动基板8，以及位于驱动基板8之上的电致发光器件9；
纹路识别发光基板位于电致发光器件的出光侧。
在具体实施时，如图3所示，电致发光器件9包括：阳极10，电致发光功能层11、阴极12。显示面板还可以包括电致发光器件9背离驱动基板8一侧的封装层13。图2中仅示出一个电致发光器件对本公开实施例提供的显示装置进行举例说明，在具体实施时，电致发光器件之间还包括像素定义层。在具体实施时，光敏器件例如可以设置在封装层背离电致发光器件的一侧。电致发光器件例如可以是有机发光二极管，或量子点发光二极管。
在具体实施时，驱动基板例如可以包括第三衬底基板，以及在第三衬底基板上形成的薄膜晶体管像素电路，薄膜晶体管像素电路例如包括：栅线、数据线、薄膜晶体管等。电致发光器件的阳极与薄膜晶体管像素电路中的驱动薄膜晶体管电连接。
在具体实施时，光敏器件可以包括：光敏电极，以及与光敏电极电连接的薄膜晶体管。光敏电极与薄膜晶体管的源电极或漏电极电连接。
或者，在具体实施时，光敏器件可以包括：光敏二极管，以及与光敏二极管电连接的薄膜晶体管。光敏二极管例如可以包括：感光层，与感光层接触且相互绝缘层的两个电极，两个电极中的一个电极与薄膜晶体管的源电极或漏电极电连接。
可选地，在本公开实施例提供的显示装置中，如图4所示，显示面板划 分为阵列排布的子像素14；
电致发光点光源16在显示面板的正投影，落入子像素14之间间隙15处在显示面板的正投影所在范围内。
在具体实施时，以显示面板为液晶显示面板为例，电致发光点光源例如可以设置在显示面板的黑矩阵对应的区域。
可选地，在本公开实施例提供的显示装置中，如图4所示，子像素14之间间隙15在显示面板的正投影的图案为网格型图案，电致发光点光源16在显示面板的正投影，位于网格型图案的网点位置处。
当然，电致发光点光源也可以设置在子像素之间间隙其他位置。
可选地，在本公开实施例提供的显示装置中，电致发光点光源包括：在衬底上依次堆叠设置的第一电极、发光功能层和第二电极；
发光功能层在衬底的正投影，落入子像素之间间隙处在显示面板的正投影所在范围内。
在具体实施时，纹路识别发光基板中，各电致发光点光源的发光功能层是不连续的，发光功能层的材料仅在小区域沉积，即点状沉积发光功能层的材料，并通过对第一电极和第二电极的形状设计实现大角度点光源。
在具体实施时，在本公开实施例提供的显示装置中，第一电极和/或第二电极为遮光电极；遮光电极在衬底的正投影，落入子像素之间间隙处在显示面板的正投影所在范围内，从而遮光电极不会影响显示面板的显示效果。
接下来以发光功能层对应网格型图案的网点位置处为例，对本公开实施例提供的显示装置中的纹路识别发光基板进行举例说明。
在具体实施时，不同电致发光点光源中的第一电极可以相互串联，不同电致发光点光源中的第二电极可以相互串联。
可选地，如图5和图8所示，第一电极17和第二电极18横纵交叉，构成网格型图案；发光功能层19位于第一电极17和第二电极18构成的网格型图案的网点位置处。
可选地，本公开实施例提供的如图5所示的显示装置，第二电极与发光 功能层交叠区域的图案为不具有开口的封闭图案。图5中，第二电极18为条形电极。
需要说明的是，图5为纹路识别发光基板中第一电极、第二电极以及发光功能层在衬底22的投影图。在具体实施时，第一电极17也为条形电极，沿图5中AA’的截面例如可以如图6所示。或者，沿图5中AA’的截面也可以是如图7所示，第一电极17具有第二开口21，此种情况，第一电极17的俯视图例如可以是如图8所示。
需要说明的是，当第二电极与发光功能层交叠区域的图案为不具有开口的封闭图案时，以图5为例，第二电极18覆盖发光功能层19的面积小于发光功能层19的总面积。即第二电极并未完全覆盖发光功能层，从而当第二电极为遮光电极时，发光功能层未被第二电极覆盖的区域作为纹路识别发光基板的透光区。当第二电极为透明电极时，发光功能层的面积可以大于第二电极覆盖发光功能层的面积，也可以等于第二电极覆盖发光功能层的面积，具体实施时可以根据实际需要进行选择。
可选地，本公开实施例提供的如图9所示的显示装置，第二电极18具有第一开口20；
发光功能层19在衬底22的正投影，覆盖第一开口20在衬底的正投影。
即第一开口对应的区域为电致发光点光源的透光区。
需要说明的是，图9为纹路识别发光基板中第一电极、第二电极以及发光功能层在衬底22的投影图。在具体实施时，第一电极可以为条形电极，沿图9中BB’的截面例如可以如图10所示。或者，第一电极17具有第二开口21，沿图9中BB’的截面也可以是如图11所示，此种情况，第一电极17的俯视图例如可以是如图8所示。
在具体实施时，如图12所示，发光功能层19也可以填入第二电极18的第一开口20。
需要说明的是，本公开实施例提供的如图5和图9所示的显示装置中，以纹路识别发光基板包括4个电致发光点光源为例进行举例说明，在具体实 施时，电致发光点光源、光敏器件的数量可以根据实际需要进行选择。
在具体实施时，当显示面板为液晶显示面板时，电致发光点光源中的电极以及发光层，可以直接在对向基板的第二衬底基板上制作，即纹路识别发光基板的衬底可以复用对向基板的第二衬底基板。从而可以减小显示装置的厚度，可以节约成本。
在具体实施时，发光功能层的材料可以选择无机电致变色材料，例如包括三氧化钨或氧化镍。发光功能层的材料也可以选择有机电致变色材料，例如包括聚噻吩、紫罗精、四硫富瓦烯、金属酞菁、聚噻吩的衍生物、紫罗精的衍生物、四硫富瓦烯的衍生物或金属酞菁的衍生物。
可选地，在本公开实施例提供的显示装置中，电致发光点光源出射光的波长范围，与显示面板出射光的波长范围互不重叠。
这样，光敏器件感光波长与电致发光点光源出射光的波长范围相对应，加光敏器件可以对电致发光点光源出射光以及显示面板出射的光进行区分，显示面板出射的光不会对纹路识别造成影响。
可选地，在本公开实施例提供的显示装置中，显示面板出射可见光，电致发光点光源出射红外光。
即电致发光点光源中发光功能层的材料为发射光谱在红外区的材料。相应的，光敏器件为红外光敏器件。
本公开实施例提供的显示装置，电致发光点光源出射红外光，电致发光点光源出射的光不会影响显示装置的正常显示，还可以进行距离测量以及体温测量，丰富显示装置的功能。
可选地，在本公开实施例提供的显示装置中，电致发光点光源与显示面板均出射可见光。
在具体实施时，电致发光点光源中发光功能层的发光材料，以及背光模组中的发光材料或电致发光器件的发光材料，可以根据实际需要出射的光的波长范围进行选择。
基于同一发明构思，本公开实施例还提供了一种上述显示装置的驱动方 法，如图13所示，方法包括：
S101、确定是否进行纹路识别；
S102、当确定进行纹路识别时，控制纹路识别发光基板中的电致发光点光源发光，并采集光敏器件反馈的信号，进行纹路识别。
本公开实施例提供的显示装置的驱动方法，当需要进行纹路识别时，控制电致发光点光源发光，电致发光点光源发出的光到达纹路再被反射到光敏器件，点光源可以提供大角度光，从而可以增强光敏器件接收的纹路谷脊反射光信号之间的差异，提高纹路识别的灵敏度、纹路识别的效果以及纹路识别准确度。
可选地，纹路识别发光基板与显示面板均出射可见光，方法还包括：
当确定进行纹路识别时，控制显示面板停止发光；
当确定完成纹路识别时，控制纹路识别发光基板中的电致发光点光源停止发光，同时控制显示面板发光。
即当纹路识别发光基板与显示面板均出射可见光，对纹路识别以及显示进行分时驱动。从而纹路识别不会影响显示装置正常显示，纹路识别过程中也可以消除显示面板背光对纹路识别的干扰。
可选地，纹路识别发光基板出射光的波长范围，与显示面板出射光的波长范围互不重叠，方法还包括：
控制纹路识别发光基板中的电致发光点光源发光的同时，控制显示面板保持发光。
当纹路识别发光基板出射光的波长范围与显示面板出射光的波长范围互不重叠时，显示面板出射的光不会对纹路识别造成干扰，可以在纹路识别阶段保持显示面板发光。即实现对纹路识别发光和显示发光的分波段驱动。
综上，本公开实施例提供的显示装置及其驱动方法，单独设置用于进行纹路识别的纹路识别发光基板，并且该纹路识别发光基板包括电致发光点光源，即用于进行纹路识别的光源为点光源，可以增强纹路识别发光基板发射光通量，从而点光源发出的光到达纹路再被反射到光敏器件，可以降低纹路 谷脊之间的信号窜扰，并且，点光源可以提供大角度光，从而可以增强纹路谷脊反射光信号差异，提高纹路识别的灵敏度、纹路识别的效果以及纹路识别准确度。
显然，本领域的技术人员可以对本公开进行各种改动和变型而不脱离本公开的精神和范围。这样，倘若本公开的这些修改和变型属于本公开权利要求及其等同技术的范围之内，则本公开也意图包含这些改动和变型在内。

Claims (15)

  1. 一种显示装置，其中，所述显示装置包括：
    显示面板，所述显示面板内设置多个用于纹路识别的光敏器件；
    纹路识别发光基板，位于所述显示面板的出光侧，所述纹路识别发光基板包括：衬底，设置在所述衬底一侧且与各所述光敏器件对应的电致发光点光源。
  2. 根据权利要求1所述的显示装置，其中，所述显示面板包括：相对设置的阵列基板和对向基板，以及位于所述阵列基板和所述对向基板之间的液晶层；
    在对向基板面向所述阵列基板的一侧设置所述光敏器件；
    所述纹路识别发光基板位于所述对向基板背离所述液晶层的一侧；
    所述显示装置还包括：位于所述显示面板背离所述纹路识别发光基板一侧的背光模组。
  3. 根据权利要求1所述的显示装置，其中，所述显示面板包括：驱动基板，以及位于所述驱动基板一侧的电致发光器件；
    所述纹路识别发光基板位于所述电致发光器件的出光侧。
  4. 根据权利要求1～3任一项所述的显示装置，其中，所述显示面板划分为阵列排布的多个子像素；
    所述电致发光点光源在所述显示面板的正投影，落入所述子像素之间间隙处在所述显示面板的正投影所在范围内。
  5. 根据权利要求4所述的显示装置，其中，所述子像素之间间隙在所述显示面板的正投影的图案为网格型图案，所述电致发光点光源在所述显示面板的正投影，位于所述网格型图案的网点位置处。
  6. 根据权利要求4所述的显示装置，其中，所述电致发光点光源包括：在所述衬底上依次堆叠设置的第一电极、发光功能层和第二电极；
    所述发光功能层在所述衬底的正投影，落入所述子像素之间间隙处在所 述显示面板的正投影所在范围内。
  7. 根据权利要求6所述的显示装置，其中，所述第一电极和/或所述第二电极为遮光电极；
    所述遮光电极在所述衬底的正投影，落入所述子像素之间间隙处在所述显示面板的正投影所在范围内。
  8. 根据权利要求7所述的显示装置，其中，所述第二电极具有第一开口；
    所述发光功能层在所述衬底的正投影，覆盖所述第一开口在所述衬底的正投影。
  9. 根据权利要求7所述的显示装置，其中，所述第一电极具有第二开口；
    所述发光功能层在所述衬底的正投影，覆盖所述第二开口在所述衬底的正投影。
  10. 根据权利要求1-3、5-9任一项所述的显示装置，其中，所述电致发光点光源出射光的波长范围，与所述显示面板出射光的波长范围互不重叠。
  11. 根据权利要求10所述的显示装置，其中，所述显示面板出射可见光，所述电致发光点光源出射红外光。
  12. 根据权利要求1-3、5-9任一项所述的显示装置，其中，所述电致发光点光源与所述显示面板均出射可见光。
  13. 一种根据权利要求1～12任一项所述的显示装置的驱动方法，其中，所述方法包括：
    确定是否进行纹路识别；
    当确定进行纹路识别时，控制所述纹路识别发光基板中的电致发光点光源发光，并采集所述光敏器件反馈的信号，进行纹路识别。
  14. 根据权利要求13所述的方法，其中，所述纹路识别发光基板与所述显示面板均出射可见光，所述方法还包括：
    当确定进行纹路识别时，控制所述显示面板停止发光；
    当确定完成纹路识别时，控制所述纹路识别发光基板中的电致发光点光源停止发光，同时控制所述显示面板发光。
  15. 根据权利要求13所述的方法，其中，所述纹路识别发光基板出射光的波长范围，与所述显示面板出射光的波长范围互不重叠，所述方法还包括：
    控制所述纹路识别发光基板中的电致发光点光源发光的同时，控制所述显示面板保持发光。
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