WO2018059060A1 - 触控面板及显示装置 - Google Patents

触控面板及显示装置 Download PDF

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Publication number
WO2018059060A1
WO2018059060A1 PCT/CN2017/092212 CN2017092212W WO2018059060A1 WO 2018059060 A1 WO2018059060 A1 WO 2018059060A1 CN 2017092212 W CN2017092212 W CN 2017092212W WO 2018059060 A1 WO2018059060 A1 WO 2018059060A1
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WO
WIPO (PCT)
Prior art keywords
substrate
fingerprint recognition
touch panel
light
touch
Prior art date
Application number
PCT/CN2017/092212
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English (en)
French (fr)
Inventor
刘英明
董学
吕敬
王海生
吴俊纬
丁小梁
许睿
赵利军
李昌峰
贾亚楠
郭玉珍
秦云科
顾品超
孟凡娜
Original Assignee
京东方科技集团股份有限公司
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Application filed by 京东方科技集团股份有限公司 filed Critical 京东方科技集团股份有限公司
Priority to US15/743,583 priority Critical patent/US10503947B2/en
Publication of WO2018059060A1 publication Critical patent/WO2018059060A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/0412—Digitisers structurally integrated in a display
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/01—Input arrangements or combined input and output arrangements for interaction between user and computer
    • G06F3/03—Arrangements for converting the position or the displacement of a member into a coded form
    • G06F3/041—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means
    • G06F3/042—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means
    • G06F3/0421—Digitisers, e.g. for touch screens or touch pads, characterised by the transducing means by opto-electronic means by interrupting or reflecting a light beam, e.g. optical touch-screen
    • 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
    • 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
    • G06V40/1347—Preprocessing; Feature extraction
    • G06V40/1359—Extracting features related to ridge properties; Determining the fingerprint type, e.g. whorl or loop
    • 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
    • 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
    • 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
    • G06V40/1341—Sensing with light passing through the finger
    • 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
    • H10K59/10—OLED displays
    • H10K59/12—Active-matrix OLED [AMOLED] displays

Definitions

  • the present invention belongs to the field of display technologies, and in particular, to a touch panel and a display device.
  • Fingerprints are inherently invariant features of the human body. They are unique to each person and can be distinguished from others. They are made up of a series of ridges and valleys on the surface of the finger skin. The details of the composition usually include the bifurcation of the ridges, the ends of the ridges, the arches (for example, tent-shaped arches), left-handedness, right-handedness, spirals or double-rotation, etc. These constituent details determine the uniqueness of the fingerprint pattern.
  • the fingerprint recognition technology developed due to the uniqueness of the fingerprint pattern is an early technology for personal identification. Optical imaging, thermal sensors, human infrared sensors and the like are currently widely used for fingerprint acquisition and input.
  • the present invention aims to at least solve one of the technical problems existing in the prior art, and provides a novel touch panel and a display device with a fingerprint recognition function, which can accurately detect a fingerprint.
  • a technical solution adopted by the present invention is a touch panel including an array substrate and a fingerprint identification substrate, the array substrate including a first substrate and a plurality of pixel units disposed on the first substrate, each The pixel unit includes a thin film transistor and a organic electroluminescent diode, the fingerprint recognition substrate includes a second substrate and a fingerprint recognition unit disposed on the second substrate, the fingerprint recognition substrate being located away from the first substrate a side of the pixel unit, the array substrate further includes a light shielding layer, and a via hole disposed between the at least partially adjacent pixel units, wherein the via hole is formed in the light shielding layer for making The light emitted by the organic electroluminescent diode and reflected by the surface of the touch body is irradiated onto the plurality of fingerprint recognition units, wherein The touch body surface includes valleys and ridges, and light reflected by the valleys and ridges of the surface of the touch body passes through the via holes and are respectively irradiated onto different fingerprint recognition units.
  • the number of the via holes is plural, and the spacing between any adjacent via holes is equal to 1 to 2 times the image distance, and the image distance is the proximity of the via hole to the fingerprint identification.
  • the fingerprint recognition substrate further includes a microlens disposed on the fingerprint recognition unit.
  • the fingerprint recognition unit is a photosensitive device.
  • the material of the light shielding layer is a metal or a black resin.
  • a gate of the thin film transistor is further formed in the light shielding layer.
  • the via has a pore diameter of from 1 ⁇ m to 100 ⁇ m.
  • the material of the first substrate comprises polyimide.
  • the material of the second substrate comprises polyimide.
  • the touch panel further includes a pair of cassette substrates on a side of the first substrate on which the pixel unit is disposed.
  • Another technical solution adopted by the present invention is a display device including the above touch panel.
  • the present invention has the following advantageous effects.
  • the touch panel of the present invention is provided with a fingerprint identification substrate on a side of the array substrate facing away from the display surface, and a via hole is disposed between at least partially adjacent pixel units of the array substrate, and the via hole satisfies the principle of small hole imaging, thereby
  • the light emitted by the organic electroluminescent diode reflected by the surface of the touch body is irradiated onto the plurality of fingerprint recognition units, and the light reflected by the valleys and the ridges of the surface of the touch body is respectively irradiated onto different fingerprint recognition units, so that The light intensity of the light received by the fingerprint recognition unit is analyzed to identify valleys and ridges that touch the surface of the body.
  • the via hole is provided, the light reflected by the area outside the touch body is blocked by the light shielding layer and cannot pass through the via hole, that is, the light emitted through the via hole is only a small area of the surface of the touch body.
  • the reflected light in this case, the fingerprint information received by the fingerprint recognition unit is more precise, and is beneficial for the recognition of the valleys and ridges of the surface of the touch body.
  • FIG. 1 is a schematic structural view of a touch panel according to a first embodiment of the present invention
  • FIG. 2 is a schematic structural view of a light shielding layer in a touch panel according to a first embodiment of the present invention including a gate;
  • FIG. 3 is a schematic diagram of a plurality of fingerprint recognition units corresponding to one via hole in the touch panel according to the first embodiment of the present invention
  • FIG. 4 is a light intensity distribution diagram after light passes through the via holes in FIG. 3 to reach different fingerprint recognition units;
  • Figure 5 is a light distribution diagram of light rays irradiated to the fingerprint recognition unit at different angles
  • FIG. 6 is a light distribution diagram after light rays of different angles are irradiated to the fingerprint recognition unit of the microlens.
  • the embodiment provides a touch panel with a fingerprint recognition function, which includes an array substrate 1 and a fingerprint identification substrate 2 .
  • the array substrate 1 includes: a first substrate 10; a plurality of pixel units disposed on the first substrate 10, each of which includes a thin film transistor 11 and an organic electroluminescent diode 12.
  • the fingerprint recognition substrate 2 includes: a second substrate 20; and a fingerprint recognition unit 21 on the second substrate 20. The fingerprint recognition substrate 2 is located on a side of the first substrate 10 facing away from the pixel unit.
  • the array substrate 1 in this embodiment further includes: a light shielding layer 13; and a via hole 14 disposed between at least partially adjacent pixel units, the via hole 14 being formed in the light shielding layer 13 for making organic electricity
  • the light emitted by the light-emitting diode 12 reflected by the surface of the touch body is irradiated onto the plurality of fingerprint recognition units 21, wherein the touch body surface includes valleys and ridges, and the light reflected by the valleys and ridges touching the surface of the body passes through the Via 14, They are respectively irradiated onto different fingerprint recognition units 21.
  • the touch body in this embodiment may include a finger, a toe, and any object capable of implementing a touch having a valley and a ridge on its surface.
  • the description is mainly made by taking a touch subject as a finger as an example.
  • the touch panel of the present embodiment is provided with a fingerprint recognition substrate 2 on a side of the organic electroluminescent diode (OLED) array substrate 1 facing away from the display surface, and a via hole is disposed between at least partially adjacent pixel units of the array substrate 1. 14.
  • the via hole 14 satisfies the principle of the aperture imaging, so that the light emitted by the organic electroluminescent diode 12 reflected through the valleys and ridges of the finger surface is irradiated onto the plurality of fingerprint recognition units 21, and reflected through the valleys and ridges of the finger surface.
  • the subsequent light is respectively irradiated onto different fingerprint recognition units 21, in which case the valleys and ridges of the finger surface can be identified by analyzing the light intensity of the light reflected by the valleys and ridges of the finger surface.
  • the via hole 14 since the via hole 14 is provided, the light reflected by the area other than the finger is blocked by the light shielding layer 13 and cannot pass through the via hole 14, that is, the light emitted through the via hole 14 is only a small surface of the finger.
  • the light reflected by the area is more accurate, and the fingerprint information received by the fingerprint recognition unit 21 is more accurate, which is beneficial to the identification of the valleys and ridges on the surface of the finger.
  • the light shielding layer 13 is disposed so as not to affect the aperture ratio of the touch panel.
  • a plurality of via holes 14 are disposed in the light shielding layer 13 of the embodiment, and a spacing between any adjacent ones of the via holes 14 is equal to 1 to 2 times the image distance, wherein the image distance is the via hole 14
  • the fingerprint recognition unit 21 Since the light reflected by the organic electroluminescent diode 12 through the surface of the finger passes through the layer structure of the array substrate 1 and the air layer between the array substrate 1 and the fingerprint recognition substrate 2, the fingerprint recognition unit 21 is reached. The light intensity of the light will be reduced. At the same time, since the incident angle of the light is different, the incident interface of the light is different. When the light intensity is relatively close, the light of different incident angles passes through different incident interfaces. Different reflections and absorptions are generated, so that, as shown in FIGS.
  • the intermediate fingerprint recognition unit 21 (for example, sensor2) corresponding to the via 14 receives the light with the strongest intensity, but with incidence The angle between the light and the normal of the touch panel is increased, and the other fingerprint recognition units 21 receive light of different light intensities (for example, the light intensity of the light received by the sensor1 and the sensor3 is smaller than the light intensity of the light received by the sensor1)
  • the valley and the ridge of the surface of the finger are recognized by analyzing the difference in the light intensity of the light received by the fingerprint recognition unit 21, there may be a problem that the valley is confused.
  • the fingerprint recognition unit 21 in the embodiment selects a photosensitive device (for example, a PIN device), as shown in FIG.
  • the microlens 22 can be disposed on each fingerprint recognition unit 21, in which case, as shown in FIG. 6, the light incident on the microlens 22 at different angles is uniformly irradiated to the fingerprint recognition unit 21
  • the light intensity of the light received by the fingerprint recognition unit 21 is not affected by the incident angle of the light, and the light intensity of the light received by the fingerprint recognition unit 21 is closer to the light emitted by the organic electroluminescent diode and reflected by the surface of the finger.
  • the light passing through the through hole 14 is more uniformly irradiated on the corresponding plurality of fingerprint recognition units 21, which is more advantageous for the identification of the fingerprint valley.
  • the material of the light shielding layer 13 may be metal or black resin, and of course, other light shielding materials may also be used.
  • the light-shielding layer 13 may further include a source and a drain 112 , 113 of the thin film transistor 11 , that is, the via 14 may be disposed in the same layer as the source and drain electrodes 112 , 113 of the thin film transistor 11 , and thus may be adopted.
  • the patterning process forms the vias 14 and the source and drain electrodes 112, 113 of the thin film transistor 11.
  • the light shielding layer 13 may further include a thin film transistor.
  • the gate 111 of 11, that is, the via 14 can be disposed in the same layer as the gate 111 of the thin film transistor 11, so that the via 14 and the gate 111 of the thin film transistor 11 can be formed by one patterning process.
  • a light shielding layer 13 having a via hole 14 may be added between any two film layers of the array substrate 1.
  • the size of the via holes 14 in this embodiment is generally in the range of 1 ⁇ m to 100 ⁇ m, preferably on the order of several ⁇ m, and the spacing between adjacent via holes 14 can be relatively long.
  • the spacing between adjacent via holes 14 can be In the order of several mm, after the fingerprint identification substrate 2 and the array substrate 1 are attached, the light emitted through each of the via holes 14 can be irradiated onto the plurality of fingerprint recognition units 21.
  • the aperture of the via 14 can also be set according to the size of the fingerprint recognition unit 21.
  • the material of the first substrate 10 of the array substrate 1 and the material of the second substrate 20 of the fingerprint identification substrate 2 in this embodiment may both be polyimide (PI).
  • PI polyimide
  • other conventional materials may also be selected.
  • the touch panel of the present embodiment further includes a counter substrate 3 on a side of the first substrate 10 on which the pixel unit is disposed.
  • the embodiment provides a display device including the touch panel in the first embodiment.
  • the fingerprint can be better recognized.
  • the display device in this embodiment may be an electroluminescent display device, such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or the like, having any display function or any product or component.
  • an electroluminescent display device such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, or the like, having any display function or any product or component.

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Abstract

一种触控面板及包括该触控面板的显示装置，该触控面板包括阵列基板(1)和指纹识别基板(2)，阵列基板(1)包括第一基底(10)和设置在第一基底(10)上的多个像素单元，每个像素单元包括薄膜晶体管(11)和有机电致发光二极管(12)，指纹识别基板(2)包括第二基底(20)和设置第二基底(20)上的指纹识别单元(21)，指纹识别基板(2)位于第一基底(10)的背离像素单元的一侧，阵列基板(1)还包括遮光层(13)、以及设置在至少部分相邻的像素单元之间的过孔(14)，过孔(14)形成在遮光层(13)中，用于使有机电致发光二极管(12)所发出的经由触摸主体表面反射后的光照射至多个指纹识别单元(21)上，其中，触摸主体表面包括谷和脊，经由触摸主体表面的谷和脊反射后的光穿过过孔(14)，分别照射至不同的指纹识别单元(21)上。

Description

触控面板及显示装置 技术领域
本发明属于显示技术领域，具体涉及触控面板及显示装置。
背景技术
指纹是人体与生俱来的不变特征，其对于每个人而言是独一无二的并可与他人相区别，它是由指端皮肤表面上的一系列脊和谷组成的，这些脊和谷的构成细节通常包括脊的分叉、脊的末端、拱形(例如帐篷式的拱形)、左旋、右旋、螺旋或双旋等，这些构成细节决定了指纹图案的唯一性。由于指纹图案的唯一性而发展起来的指纹识别技术是较早被作为个人身份验证的技术，光学成像、热敏传感器、人体红外传感器等目前被广泛用于指纹采集和输入。
发明内容
本发明旨在至少解决现有技术中存在的技术问题之一，提供一种新型的具有指纹识别功能的触控面板及显示装置，其可以精准检测指纹。
本发明所采用的一种技术方案是一种触控面板，其包括阵列基板和指纹识别基板，所述阵列基板包括第一基底和设置在所述第一基底上的多个像素单元，每个所述像素单元包括薄膜晶体管和有机电致发光二极管，所述指纹识别基板包括第二基底和设置所述第二基底上的指纹识别单元，所述指纹识别基板位于所述第一基底的背离所述像素单元的一侧，所述阵列基板还包括遮光层、以及设置在至少部分相邻的所述像素单元之间的过孔，所述过孔形成在所述遮光层中，用于使所述有机电致发光二极管所发出的经由触摸主体表面反射后的光照射至多个指纹识别单元上，其中， 所述触摸主体表面包括谷和脊，经由所述触摸主体表面的谷和脊反射后的光穿过所述过孔，分别照射至不同的所述指纹识别单元上。
优选的是，所述过孔的个数为多个，且任意相邻的过孔之间的间距等于像距的1～2倍，所述像距为所述过孔的靠近所述指纹识别单元的一端到所述指纹识别单元所在层之间的垂直距离。
优选的是，所述指纹识别基板还包括设置在所述指纹识别单元上的微透镜。
优选的是，所述指纹识别单元为光敏器件。
优选的是，所述遮光层的材料为金属或者黑色树脂。
优选的是，所述遮光层中还形成有所述薄膜晶体管的栅极。
优选的是，所述过孔的孔径为1μm～100μm。
优选的是，所述第一基底的材料包括聚酰亚胺。
优选的是，所述第二基底的材料包括聚酰亚胺。
优选的是，所述触控面板还包括位于所述第一基底的设置有所述像素单元的一侧的对盒基板。
本发明所采用的另一种技术方案是一种显示装置，其包括上述的触控面板。
本发明具有如下有益效果。
本发明的触控面板在阵列基板的背离显示面的一侧设置指纹识别基板，并在阵列基板的至少部分相邻的像素单元之间设置过孔，该过孔满足小孔成像原理，从而使有机电致发光二极管所发出的经由触摸主体表面反射的光照射至多个指纹识别单元上，且经由触摸主体表面的谷和脊反射后的光分别照射至不同的指纹识别单元上，这样，可以通过分析指纹识别单元接收到的光的光强来识别触摸主体表面的谷和脊。而且，由于设置了过孔，因此触摸主体之外的区域所反射的光线会被遮光层遮挡，无法穿过过孔，也就是说，经由过孔射出的光仅是触摸主体表面小面积区域所反射出的光，该情况下，指纹识别单元所接收到的指纹信息也就更加精准，有利于触摸主体表面的谷和脊的识别。
附图说明
图1为本发明的第一实施例的触控面板的结构示意图；
图2为本发明的第一实施例的触控面板中的遮光层包括栅极的结构示意图；
图3为本发明的第一实施例的触控面板中一个过孔对应多个指纹识别单元的示意图；
图4为光经过图3中的过孔到达不同指纹识别单元后的光强分布图；
图5为不同角度的光线照射至指纹识别单元后的光线分布图；
图6为不同角度的光线照射至增加了微透镜的指纹识别单元后的光线分布图。
具体实施方式
为使本领域技术人员更好地理解本发明的技术方案，下面结合附图和具体实施方式对本发明作进一步详细描述。
第一实施例
结合图1所示，本实施例提供一种具有指纹识别功能的触控面板，其包括：阵列基板1和指纹识别基板2。阵列基板1包括：第一基底10；设置在第一基底10上的多个像素单元，每个像素单元包括薄膜晶体管11和有机电致发光二极管12。指纹识别基板2包括：第二基底20；设置第二基底20上的指纹识别单元21。指纹识别基板2位于第一基底10的背离像素单元的一侧。特别地，本实施例中的阵列基板1还包括：遮光层13；以及设置在至少部分相邻的像素单元之间的过孔14，过孔14形成在遮光层13中，用于使有机电致发光二极管12所发出的经由触摸主体表面反射后的光照射至多个指纹识别单元21上，其中，触摸主体表面包括谷和脊，经由触摸主体表面的谷和脊反射后的光穿过所述过孔14， 分别照射至不同的指纹识别单元21上。
本实施例中的触摸主体可以包括手指、脚趾、以及其表面具有谷和脊的任何能够实施触摸的客体。在本实施例中主要是以触摸主体是手指为例进行说明。本实施例的触控面板在有机电致发光二极管(OLED)阵列基板1的背离显示面的一侧设置指纹识别基板2，并在阵列基板1的至少部分相邻的像素单元之间设置过孔14，过孔14满足小孔成像原理，从而使有机电致发光二极管12所发出的经由手指表面的谷和脊反射的光照射至多个指纹识别单元21上，且经由手指表面的谷和脊反射后的光分别照射至不同的指纹识别单元21上，该情况下，可以通过分析经由手指表面的谷和脊反射后的光的光强，从而识别手指表面的谷和脊。而且，由于设置了过孔14，因此手指之外的区域所反射的光会被遮光层13遮挡而无法穿过过孔14，也就是说，经由过孔14射出的光仅是手指表面的小面积区域所反射出的光，此时指纹识别单元21所接收到的指纹信息也就更加精准，有利于手指表面的谷和脊的识别。当然，还应当理解的是，遮光层13被设置为不影响触控面板的开口率。
在本实施例的遮光层13中设置多个过孔14，且任意相邻的所述过孔14之间的间距等于像距的1～2倍，其中，所述像距为过孔14的底部(即，过孔14的靠近指纹识别单元21的一端)到所述指纹识别单元21所在层的垂直距离。也就是说，任意相邻过孔14之间可设置多个像素单元，这样设置是因为，如果过孔14设置的密度过大，将会导致经由相邻过孔14射出的光将会照射至同一个指纹识别单元21，造成信号串扰，从而导致手指表面的谷和脊的识别不准确。
由于有机电致反光二极管12所发出的经由手指表面反射后的光在穿过阵列基板1的各层结构、以及阵列基板1和指纹识别基板2之间的空气层后，到达指纹识别单元21的光的光强会有所降低，同时，由于光的入射角度不同，则光的入射界面不同，在光强较为接近的情况下，不同入射角度的光经过不同的入射界面 时会产生不同的反射以及吸收，这样，如图3和图4所示，与过孔14对应的中间的指纹识别单元21(例如sensor2)接收到的光的光强最强，但随着入射光与触控面板的法线之间的角度增大，其他指纹识别单元21会接收到不同光强的光(例如，sensor1和sensor3接收到的光的光强小于sensor1接收到的光的光强)，该情况下，通过分析指纹识别单元21所接收到的光的光强差异来识别手指表面的谷和脊时，可能会存在谷脊混淆的问题。特别地，在本实施例中的指纹识别单元21选用光敏器件(例如PIN器件)的情况下，如图5所示，垂直于触控面板照射的光线会进入到PIN器件，一个光子会产生一个电子空穴对，但是，与触控面板的法线成一定角度的光线照射到PIN器件表面后，由于PIN器件表面膜层介质的折射率，部分光线会发生反射或者折射，造成光的转化效率降低，从而过孔14正下方的PIN器件产生的电流大，偏离过孔14的正下方的PIN器件产生的电流小，此时，通过分析指纹识别单元21所接收到的光的光强差异来识别手指表面的谷和脊时，可能会存在谷脊混淆的问题。因此，在本实施例中，可以在每个指纹识别单元21上设置微透镜22，该情况下，如图6所示，以不同角度入射至微透镜22的光均垂直照射至指纹识别单元21，使得指纹识别单元21接收到的光的光强不受光的入射角度的影响，指纹识别单元21接收到的光的光强更接近于有机电致发光二极管所发出的经由手指表面反射后的光的光强，同时，经过过孔14的光线更加均匀地照射在对应的多个指纹识别单元21上，更有利于指纹谷脊的识别。
本实施例中，遮光层13的材料可以采用金属或者黑色树脂，当然还可以选用其他遮光材料。
如图1所示，遮光层13中还可以包括薄膜晶体管11的源漏极112、113，也就是说，过孔14可以与薄膜晶体管11的源漏极112、113同层设置，因此可以采用一次构图工艺形成过孔14和薄膜晶体管11的源漏极112、113。
可选地，如图2所示，遮光层13中还可以包括薄膜晶体管 11的栅极111，也就是说，过孔14可以与薄膜晶体管11的栅极111同层设置，因此可以采用一次构图工艺形成过孔14和薄膜晶体管11的栅极111。当然，也可以在阵列基板1的任意两个膜层之间增设一层具有过孔14的遮光层13。
本实施例中的过孔14的尺寸一般在1μm～100μm的范围内，优选为几μm量级，相邻过孔14之间的间距可较远，比如相邻过孔14之间的间距可以为几mm量级，这样，指纹识别基板2和阵列基板1贴合后，经由每个过孔14射出的光可以照射至多个指纹识别单元21上。当然，也可以根据指纹识别单元21的尺寸来设定过孔14的孔径。
本实施例中的阵列基板1的第一基底10的材料和指纹识别基板2的第二基底20的材料可以均为聚酰亚胺(PI)，当然，也可以选取其他常规的材料。
当然，本实施例的触控面板还包括位于所述第一基底10的设置有所述像素单元的一侧的对盒基板3。
第二实施例
本实施例提供一种显示装置，其包括第一实施例中的触控面板。
本实施例中显示装置由于具有第一实施例中的触控面板，因此可以更好地对指纹进行识别。
本实施例中的显示装置可以为电致发光显示装置，例如电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等具有显示功能的任何产品或部件。
可以理解的是，以上实施方式仅仅是为了说明本发明的原理而采用的示例性实施方式，然而本发明并不局限于此。对于本领域内的普通技术人员而言，在不脱离本发明的精神和实质的情况下，可以做出各种变型和改进，这些变型和改进也视为本发明的保护范围。

Claims (11)

  1. 一种触控面板，包括阵列基板和指纹识别基板，所述阵列基板包括第一基底和设置在所述第一基底上的多个像素单元，每个所述像素单元包括薄膜晶体管和有机电致发光二极管，所述指纹识别基板包括第二基底和设置所述第二基底上的指纹识别单元，所述指纹识别基板位于所述第一基底的背离所述像素单元的一侧，所述阵列基板还包括遮光层、以及设置在至少部分相邻的所述像素单元之间的过孔，所述过孔形成在所述遮光层中，用于使所述有机电致发光二极管所发出的经由触摸主体表面反射后的光照射至多个指纹识别单元上，其中，所述触摸主体表面包括谷和脊，经由所述触摸主体表面的谷和脊反射的光穿过所述过孔分别照射至不同的所述指纹识别单元上。
  2. 根据权利要求1所述的触控面板，其中，所述过孔的个数为多个，且任意相邻的所述过孔之间的间距等于像距的1～2倍，所述像距为所述过孔的靠近所述指纹识别单元的一端到所述指纹识别单元所在层之间的垂直距离。
  3. 根据权利要求1所述的触控面板，其中，所述指纹识别基板还包括设置在所述指纹识别单元上的微透镜。
  4. 根据权利要求1所述的触控面板，其中，所述指纹识别单元为光敏器件。
  5. 根据权利要求1所述的触控面板，其中，所述遮光层的材料为金属或者黑色树脂。
  6. 根据权利要求1所述的触控面板，其中，所述遮光层中还形成有所述薄膜晶体管的栅极。
  7. 根据权利要求1所述的触控面板，其中，所述过孔的孔径为1μm～100μm。
  8. 根据权利要求1所述的触控面板，其中，所述第一基底的材料包括聚酰亚胺。
  9. 根据权利要求1所述的触控面板，其中，所述第二基底的材料包括聚酰亚胺。
  10. 根据权利要求1所述的触控面板，还包括位于所述第一基底的设置有所述像素单元的一侧的对盒基板。
  11. 一种显示装置，包括根据权利要求1-10中任一项所述的触控面板。
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