WO2018201800A1 - 光学指纹识别装置及显示面板 - Google Patents

光学指纹识别装置及显示面板 Download PDF

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Publication number
WO2018201800A1
WO2018201800A1 PCT/CN2018/078580 CN2018078580W WO2018201800A1 WO 2018201800 A1 WO2018201800 A1 WO 2018201800A1 CN 2018078580 W CN2018078580 W CN 2018078580W WO 2018201800 A1 WO2018201800 A1 WO 2018201800A1
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WIPO (PCT)
Prior art keywords
electrode
layer
display panel
photosensitive
insulating layer
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PCT/CN2018/078580
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English (en)
French (fr)
Inventor
贾亚楠
董学
王海生
吴俊纬
刘英明
李昌峰
许睿
赵利军
秦云科
顾品超
郭玉珍
韩艳玲
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 US16/316,541 priority Critical patent/US10714543B2/en
Publication of WO2018201800A1 publication Critical patent/WO2018201800A1/zh

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    • 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
    • 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

  • Embodiments of the present disclosure relate to the field of optical fingerprint recognition technologies, and in particular, to an optical fingerprint recognition device and a display panel having the same.
  • the fingerprint refers to the uneven line on the front surface of the finger end of the human; wherein the convex position is called a ridge, and the concave position is called a valley. Because fingerprints have lifetime invariance, uniqueness and convenience, they have become almost synonymous with biometrics.
  • the fingerprint recognition of the display module is mainly contact fingerprint recognition, and the fingerprint recognition device is generally disposed in the non-display area such as the main menu key or the back of the display module, but the display module is moving toward ultra-thin, high color gamut and wide.
  • the perspective and integration direction are developing. Therefore, how to integrate the fingerprint recognition device into the display area of the display module and the actual optical fingerprint recognition is a research hotspot.
  • the sensor may simultaneously receive light reflected by a plurality of ridges and/or valleys due to scattering of light reflected by the finger, thereby causing the sensor according to the sensor.
  • the fingerprint information recognized by the received light is not accurate. Therefore, how to improve the accuracy of the recognized fingerprint information in the optical fingerprint recognition process is a technical problem to be solved by those skilled in the art.
  • An object of the present disclosure is to provide an optical fingerprint recognition device and a display panel having the same, for improving the accuracy of the recognized fingerprint information in the optical fingerprint recognition process.
  • an optical fingerprint recognition apparatus is provided.
  • the optical fingerprinting device may include a light emitting structure and a photosensitive sensor.
  • the light emitting structure includes: a transparent first electrode, an opaque second electrode, an electroluminescent layer disposed between the first electrode and the second electrode, and the first electrode, the electricity a light-emitting layer and a through hole of the second electrode.
  • the photosensitive sensor is disposed on a side of the light emitting structure adjacent to the second electrode, and is configured to receive light transmitted through the through hole and acquire fingerprint information according to the received light.
  • the photosensitive sensor may include a photosensitive structure, a control structure, and a current detecting structure.
  • the photosensitive structure is configured to receive light transmitted through the through hole and generate an induced current according to the received light;
  • the current detecting structure is configured to detect an induced current generated by the photosensitive structure and generate according to the photosensitive structure
  • the sensing current acquires fingerprint information;
  • the control structure connects the photosensitive structure and the current detecting structure for controlling connection or disconnection of the photosensitive structure and the current detecting structure.
  • the photosensitive structure may include: a transparent third electrode; a fourth electrode disposed on a side of the third electrode facing away from the light emitting structure; and a third electrode disposed at the third electrode And a sensing layer between the fourth electrode.
  • the light emitting structure coincides with a projection of the photosensitive structure in a direction perpendicular to a plane in which the light emitting structure and the photosensitive structure are located; and the optical fingerprinting device further includes a first insulating layer; The first insulating layer is located between the second electrode and the third electrode and the first insulating layer is a transparent insulating layer.
  • control structure may include: an active layer, a second insulating layer covering the active layer, a gate metal layer disposed on the second insulating layer, covering the gate metal a third insulating layer of the layer, an isolation layer covering the third insulating layer, a source/drain metal layer disposed on the isolation layer, a passivation layer covering the source/drain metal layer, and the passivation layer Conductive electrode.
  • the source/drain metal layer includes: a source, a drain, and a data line;
  • the gate metal layer includes: a gate and a gate line in contact with the gate; the source and the drain pass through The via of the isolation layer, the third insulating layer and the second insulating layer is in contact with the active layer; the data line is in contact with the drain; the conductive electrode passes through the passivation layer A hole is in contact with the source; the conductive electrode is also in contact with the fourth electrode.
  • the photosensitive structure and the control structure may be integrated on an array substrate of a display panel.
  • the through hole has a circular cross section that is circular or square or diamond shaped.
  • a display panel is provided.
  • the display panel may include the optical fingerprint recognition device of any of the preceding embodiments.
  • the display panel may be an organic light emitting display panel or a liquid crystal display panel.
  • the optical fingerprint recognition device may be disposed in an effective display area of the display panel.
  • the optical fingerprint recognition device may be disposed in a bezel area of the display panel.
  • FIG. 1 is a schematic structural diagram of an optical fingerprint identification device according to an embodiment of the present disclosure
  • FIG. 2 is a top plan view of a light emitting structure according to an embodiment of the present disclosure
  • FIG. 3 is a schematic diagram showing the operation of an optical fingerprint identification device according to an embodiment of the present disclosure
  • FIG. 4 is a schematic structural diagram of an optical fingerprint identification device according to an embodiment of the present disclosure.
  • FIG. 5 is a third schematic structural diagram of an optical fingerprint identification device according to an embodiment of the present disclosure.
  • FIG. 6 is an equivalent circuit diagram of a photosensitive inductor according to an embodiment of the present disclosure.
  • FIG. 7 is a fourth schematic structural diagram of an optical fingerprint identification device according to an embodiment of the present disclosure.
  • an optical fingerprint recognition apparatus is provided.
  • a schematic cross-sectional view of the optical fingerprinting device is shown in FIG. 1, and a schematic top view of the optical fingerprinting device is shown in FIG.
  • the optical fingerprint recognition device comprises: a light emitting structure 1 and a photosensitive sensor 2 .
  • the light emitting structure 1 includes a first electrode 11 , a second electrode 12 , an electroluminescent layer 13 disposed between the first electrode 11 and the second electrode 12 , and a through hole 100 penetrating the first electrode 11 .
  • the first electrode 11 is a transparent electrode
  • the second electrode 12 is an opaque electrode.
  • the photosensitive sensor 2 is disposed on a side of the light emitting structure close to the second electrode, and is configured to receive light transmitted through the through hole 100 and acquire fingerprint information according to the received light.
  • the first electrode 11 is disposed as a transparent electrode in order to enable the detection light generated by the electroluminescent layer 13 to be transmitted; and the second electrode 12 is disposed as an opaque electrode on the one hand.
  • the light generated by the electroluminescent layer 13 is prevented from directly illuminating the photosensitive sensor 2, and on the other hand, the detection light for avoiding unwanted or undesirable finger reflection is irradiated onto the photosensitive sensor 2.
  • the electroluminescent layer 13 is caused to generate detection light by applying a voltage to the first electrode 11 and the second electrode 12, respectively, and by a voltage difference across the first electrode 11 and the second electrode 12.
  • the detection light emitted by the electroluminescent layer 13 is transmitted through the first electrode 11 and reaches the finger (the curve located above the optical fingerprint recognition device in FIG. 3 represents the outer contour of the finger), and the finger reflects the reflected light to generate reflected light (FIG. 3).
  • the reflected light includes a light of a, b, c, d, and e as an example.
  • the reflected light (light a, light e) of the light path in other areas than the through hole 100 sequentially passes through the first electrode 11 and the electric
  • the luminescent layer 13 is projected onto the second electrode 12.
  • the second electrode 12 is an opaque electrode, the light ray a and the light ray e are blocked from being received by the photosensitive sensor 2; the light path is located in the area of the through hole 100 (light b, light) c.
  • the light ray d) is directly projected through the through hole 100 through the first electrode 11, the electroluminescent layer 13, and the second electrode 12 onto the photosensitive sensor 2, so that the reflected light of the optical path in the area of the through hole 100 can be photosensitively sensed.
  • Receiver 2 receives. That is, the reflected light received by the photosensitive sensor 2 is light that is reflected by the area between the light b and the light d and has a scattering angle between the light b and the light d. Since the light that can be received by the photosensitive sensor 2 is limited to the above range, it is ensured that the photosensitive sensor 2 receives only one texture information.
  • the function of the light-emitting structure of the optical fingerprint recognition device provided by the embodiment of the present disclosure in the optical fingerprint recognition device includes two aspects.
  • the detection light is generated, and on the other hand, the reflected light generated by the finger is filtered, so that the light generated by a certain area on the finger and having a scattering angle within a certain range can be received by the photosensitive sensor.
  • the thickness of the electroluminescent layer can be designed in consideration of the requirement that the electroluminescent layer 13 generate detection light and filter the reflected light.
  • the shape of the through hole 100 is not limited in the embodiment of the present disclosure, and the radial cross section of the through hole 100 in the embodiment of the present disclosure may be circular or square or diamond or other suitable shape.
  • An optical fingerprint identification device includes a light emitting structure and a photosensitive inductor; the light emitting structure includes: a first electrode, a second electrode, and an electroluminescent layer disposed between the first electrode and the second electrode, thereby emitting light
  • the structure may cause the electroluminescent layer to generate light that detects the fingerprint by controlling a voltage applied to the first electrode and the second electrode; the light emitting structure further includes a through hole penetrating the first electrode, the electroluminescent layer, and the second electrode,
  • the first electrode is a transparent electrode, and the second electrode is an opaque electrode, so that the light-emitting structure can also filter the reflected light from the finger, so that the reflected light that can pass through the through hole is received by the photosensitive sensor;
  • the scattering angle of the reflected light of the through hole is within a certain range and is generated by a certain area on the finger, so the photosensitive sensor can only receive the light reflected from the position opposite to the finger, thereby preventing the photosensitive sensor from receiving multiple at
  • the photosensitive sensor 2 of the optical fingerprint recognition device includes a photosensitive structure 21, a control structure 22, and a current detecting structure 23.
  • the photosensitive structure 21 may include a third electrode 211, a fourth electrode 212, and a light sensitive layer 213 disposed between the third electrode 211 and the fourth electrode 212.
  • the third electrode 211 is adjacent to the light emitting structure and is a transparent electrode.
  • the fourth electrode 212 is disposed on a side of the third electrode 211 facing away from the light emitting structure 1.
  • the photosensitive structure 21 is for receiving light transmitted through the through hole 100 and generating an induced current according to the received light.
  • the control structure 22 connects the photosensitive structure 21 and the current detecting structure 23 for controlling the connection or disconnection between the photosensitive structure 21 and the current detecting structure 23.
  • the current detecting structure 23 detects the induced current generated by the photosensitive structure 21 and acquires fingerprint information according to the induced current generated by the photosensitive structure.
  • the third electrode 211 in the above embodiment needs to be formed of a transparent material.
  • the sensing layer 213 is located above the fourth electrode 212, the embodiment of the present disclosure does not limit whether the fourth electrode 212 is transparent, that is, the fourth electrode 212 may be a transparent electrode or an opaque electrode.
  • the light-emitting structure 1 coincides with the projection of the photosensitive structure 21 in a direction perpendicular to the plane of the structure.
  • the optical fingerprint identification device further includes a first insulating layer 3 between the second electrode 12 and the third electrode 211 and the first insulating layer 3 is a transparent insulating layer.
  • the first insulating layer 3 in the above embodiment also needs to be formed of a transparent material.
  • the control structure 22 may include an active layer 221, a second insulating layer 222 covering the active layer 221, a gate metal layer disposed on the second insulating layer, and an overlay. a third insulating layer 223 of the gate metal layer, an isolation layer 224 covering the third insulating layer 223, a source/drain metal layer disposed on the isolation layer, a passivation layer 225 covering the source/drain metal layer, and a conductive layer on the passivation layer Electrode 226.
  • the source/drain metal layer includes a source 51, a drain 52, and a data line (not shown in FIG. 5); the gate metal layer includes a gate 53 and a gate line in contact with the gate 51 (not shown in FIG. 5)
  • the source 51 and the drain 52 are in contact with the active layer 221 through via holes penetrating the isolation layer 224, the third insulating layer 223, and the second insulating layer 222; the data line is in contact with the drain 52; and the conductive electrode 226 is blunt through The via of the layer is in contact with the source 51; the conductive electrode 226 is also in contact with the fourth electrode 212.
  • the photosensitive structure 21 and the control structure 22 of the photosensitive sensor 2 in the embodiment of the present disclosure may be a photodiode and a thin film transistor integrated in the display panel, respectively.
  • An equivalent circuit diagram of the structure formed by the photosensitive structure 21 and the control structure 22 is as shown in FIG. 6, wherein the cathode of the photodiode is connected to the source 51 of the thin film transistor 22, and the drain of the thin film transistor 22 is connected to the current detecting structure through a data line. twenty three.
  • the photosensitive structure 21 and the control structure 22 are both integrated or disposed on the array substrate 70 of the display panel.
  • the optical fingerprint recognition device can be integrated into the display panel by integrating or disposing the photosensitive structure 21 and the control structure 22 on the array substrate 70 of the display panel, thereby saving the manufacture of the optical fingerprint identification device.
  • the display panel has an optical fingerprint recognition function.
  • a display panel comprising the optical fingerprint recognition device provided by any of the above embodiments.
  • the display panel may specifically be any display panel of a product or component having a display function, such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • a display function such as an electronic paper, a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator, and the like.
  • the display panel may be an organic light emitting display panel (OLED) or a liquid crystal display panel (LCD).
  • OLED organic light emitting display panel
  • LCD liquid crystal display panel
  • the optical fingerprinting device is disposed within an active display (Active Area or AA) region of the display panel.
  • active display Active Area or AA
  • the optical fingerprinting device is disposed within a bezel area of the display panel.

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Abstract

公开了一种光学指纹识别装置及具有这种光学指纹识别装置的显示面板。所述光学指纹识别装置包括：发光结构和光敏感应器。发光结构包括：透明的第一电极、不透明的第二电极、设置于第一电极和第二电极之间的电致发光层、和贯穿第一电极、电致发光层以及第二电极的通孔。光敏感应器设置在所述发光结构的靠近第二电极的一侧，并用于接收透射过通孔的光线，并根据接收到的光线获取指纹信息。

Description

光学指纹识别装置及显示面板 技术领域
本公开的实施例涉及光学指纹识别技术领域，尤其涉及一种光学指纹识别装置及具有这种光学指纹识别装置的显示面板。
背景技术
指纹是指人的手指末端正面皮肤上凸凹不平的纹线；其中，凸起位置称为脊，凹陷位置称为谷。由于指纹具有终身不变性、唯一性和方便性，已几乎成为生物特征识别的代名词。
当前，显示模组的指纹识别主要为接触式指纹识别，且指纹识别装置一般设置在主菜单键或显示模组的背面等非显示器区域，然而显示模组正在向超薄、高色域、广视角、集成化的方向发展，因此如何将指纹识别装置集成于与显示模组的显示区域并现实光学指纹识别是一个研究热点。然而，在光学指纹识别过程中，当手指与传感器的距离较大时，由于经过手指反射后的光线的散射，传感器可能会同时接收到多个脊和/或谷反射的光线，进而导致根据传感器接收到的光线识别出的指纹信息不准确。因此，如何在光学指纹识别过程中提高识别出的指纹信息的准确性是本领域技术人员亟待解决的一个技术问题。
发明内容
本公开的目的在于提供一种光学指纹识别装置及具有这种光学指纹识别装置的显示面板，用于在光学指纹识别过程中提高识别出的指纹信息的准确性。
根据本公开的第一方面，提供了一种光学指纹识别装置。
根据一个示例性的实施例，所述光学指纹识别装置可包括：发光结构和光敏感应器。所述发光结构包括：透明的第一电极、不透明的第二电极、设置于所述第一电极和所述第二电极之间的电致发光层、和贯穿所述第一电极、所述电致发光层以及所述第二电极的通孔。所述光敏感应器设置在所述发光结构的靠近第二电极的一侧，并用于接收透射过所述通孔的光线， 并根据接收到的光线获取指纹信息。
根据另一示例性实施例，所述光敏感应器可包括：感光结构、控制结构以及电流检测结构。所述感光结构用于接收透射过所述通孔的光线，并根据接收到的光线产生感应电流；所述电流检测结构用于检测所述感光结构产生的感应电流并根据所述感光结构产生的感应电流获取指纹信息；所述控制结构连接所述感光结构和所述电流检测结构，用于控制所述感光结构与所述电流检测结构的连接或断开。
根据又一示例性实施例，所述感光结构可包括：透明的第三电极；设置在所述第三电极的背离所述发光结构的一侧的第四电极；和设置在所述第三电极和所述第四电极之间的感应层。
根据再一示例性实施例，所述发光结构与所述感光结构的沿与发光结构与感光结构所在的平面垂直的方向上的投影重合；并且所述光学指纹识别装置还包括第一绝缘层；所述第一绝缘层位于所述第二电极和所述第三电极之间且所述第一绝缘层为透明绝缘层。
根据再一示例性实施例，所述控制结构可包括：有源层、覆盖所述有源层的第二绝缘层、设置于所述第二绝缘层上的栅金属层、覆盖所述栅金属层的第三绝缘层、覆盖所述第三绝缘层的隔离层、设置于所述隔离层上的源漏金属层、覆盖所述源漏金属层的钝化层以及位于所述钝化层上的导电电极。所述源漏金属层包括：源极、漏极以及数据线；所述栅金属层包括：栅极以及与所述栅极相接触的栅线；所述源极和所述漏极通过贯穿所述隔离层、第三绝缘层以及所述第二绝缘层的过孔与所述有源层接触；所述数据线与所述漏极接触；所述导电电极通过贯穿所述钝化层的过孔与所述源极相接触；所述导电电极还与所述第四电极相接触。
根据再一示例性实施例，所述感光结构和所述控制结构均可集成于显示面板的阵列基板上。
根据再一示例性实施例，所述通孔的径向截面为圆形或者正方形或者菱形。
根据本公开的第二方面，提供了一种显示面板。
根据一个示例性的实施例，所述显示面板可包括前述任一实施例所述的光学指纹识别装置。
根据另一示例性实施例，所述显示面板可为有机发光显示面板或液晶 显示面板。
根据又一示例性实施例，所述光学指纹识别装置可设置于所述显示面板的有效显示区域。
根据再一示例性实施例，所述光学指纹识别装置可设置于所述显示面板的边框区域。
附图说明
为了更清楚地说明本公开的实施例或现有技术中的技术方案，下面将对实施例或现有技术描述中所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本公开的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本公开的实施例提供的光学指纹识别装置的示意性结构图之一；
图2为本公开的实施例提供的发光结构的俯视图；
图3为本公开的实施例提供的光学指纹识别装置的工作原理图；
图4为本公开的实施例提供的光学指纹识别装置的示意性结构图之二；
图5为本公开的实施例提供的光学指纹识别装置的示意性结构图之三；
图6为本公开的实施例提供的光敏感应器的等效电路图；
图7为本公开的实施例提供的光学指纹识别装置的示意性结构图之四。
具体实施方式
下面将结合本公开的实施例中的附图，对本公开的实施例中的技术方案进行清楚、完整地描述，显然，所描述的实施例仅仅是本公开的一部分实施例，而不是全部的实施例。基于本公开中的实施例，本领域普通技术人员在没有做出创造性劳动前提下所获得的所有其他实施例，都属于本公开保护的范围。
根据本公开的一个方面，提供一种光学指纹识别装置。根据一个示例 性的实施例，该光学指纹识别装置的截面示意图参见图1，并且该光学指纹识别装置的俯视示意图参见图2。如图1所示；该光学指纹识别装置包括：发光结构1和光敏感应器2。
发光结构1包括：第一电极11、第二电极12、设置于第一电极11和第二电极12之间的电致发光层13、以及通孔100，所述通孔100贯穿第一电极11、电致发光层13以及第二电极12。第一电极11为透明电极，第二电极12为不透明电极。
光敏感应器2设置在所述发光结构的靠近第二电极的一侧，并用于接收透射过通孔100的光，并根据接收到的光获取指纹信息。
需要说明的是，在上述实施例中，将第一电极11设置为透明电极是为了能够使电致发光层13产生的检测光线透射出去；而将第二电极12设置为不透明电极一方面是为了避免电致发光层13产生的光线直接照射到光敏感应器2上，另一方面是为了避免不需要的或不理想的手指反射的检测光线照射到光敏感应器2上。
下参照图3所示对上述光学指纹识别装置的工作原理进行说明。
首先，当需要进行指纹识别时，通过分别向第一电极11和第二电极12上施加电压，并通过第一电极11与第二电极12上的电压差使电致发光层13产生检测光线。
其次，电致发光层13发出的检测光线透射过第一电极11后到达手指(图3中位于光学指纹识别装置上方的曲线表示手指的外轮廓)，手指对检测光线反射产生反射光线(图3中以反射光线包括a、b、c、d、e五条光线为例进行说明)，光路位于通孔100以外其他区域的反射光线(光线a、光线e)依次穿过第一电极11和电致发光层13投射到第二电极12上，由于第二电极12为不透明电极，因此光线a和光线e被阻挡无法被光敏感应器2接收；光路位于通孔100区域的反射光线(光线b、光线c、光线d)则直接通过通孔100穿过第一电极11、电致发光层13以及第二电极12投射到光敏感应器2上，因此光路位于通孔100区域的反射光线可以被光敏感应器2接收。即光敏感应器2接收到的反射光线为由光线b与光线d之间的区域反射且散射角度在光线b与光线d之间的光线。由于光敏感应器2可以接收的光线被限定在了上述范围之内，所以可以保证光敏感应器2仅接收一个纹路信息。
由上述光学指纹识别装置的工作原理可知，本公开的实施例提供的光学指纹识别装置的发光结构在光学指纹识别装置中的作用包括两方面。一方面为产生检测光线，另一方面为对手指产生的反射光线进行滤光，使由手指上的一定区域产生且散射角度在一定范围的光线才可以被光敏感应器接收。
在实际制作时，可以综合考虑电致发光层13产生检测光线和对反射光线进行滤光的需求来设计电致发光层的厚度。
此外，本公开的实施例中对通孔100的形状不做限定，本公开的实施例中的通孔100的径向截面可以为圆形或者正方形或者菱形或者其他适当的形状。
本公开的实施例提供的光学指纹识别装置包括发光结构和光敏感应器；发光结构包括：第一电极、第二电极以及设置于第一电极和第二电极之间的电致发光层，因此发光结构可以通过控制向第一电极和第二电极上施加的电压使电致发光层产生对指纹进行检测的光线；发光结构还包括贯穿第一电极、电致发光层以及第二电极的通孔，且第一电极为透明电极，第二电极为不透明电极，因此发光结构还可以对来自手指的反射光线进行滤光，使可以透过通孔的反射光线被光敏感应器接收到；由于可以透射过通孔的反射光线的散射角度均在一定范围内且是由手指上一定区域产生的，因此光敏感应器仅能接收到手指上与其相对的位置反射的光线，从而避免光敏感应器同时接收多个脊和/或谷反射的光线，因此，本公开的实施例提供的光学指纹识别装置可以在光学指纹识别过程中提高识别出的指纹信息的准确性。
在一个示例性的实施例中，参照图4所示，上述光学指纹识别装置的光敏感应器2包括：感光结构21、控制结构22以及电流检测结构23。感光结构21可包括：第三电极211、第四电极212以及设置于第三电极211和第四电极212之间的光敏感层213。第三电极211靠近所述发光结构并且为透明电极。第四电极212设置在第三电极211的背离所述发光结构1的一侧。感光结构21用于接收透射过通孔100的光线，并根据接收到的光线产生感应电流。
控制结构22连接感光结构21和电流检测结构23，用于控制感光结构21与电流检测结构23之间的连接或断开。
在当感光结构21与电流检测结构23彼此连接(例如，电连接、无线连接等)的情况下，电流检测结构23检测感光结构21产生的感应电流并根据感光结构产生的感应电流获取指纹信息。
由于透过通孔100的光线需要穿过第三电极211才可以被感应层213接收，因此上述实施例中的第三电极211需要由透明材料制作形成。此外，由于感应层213位于第四电极212上方，因此本公开的实施例中不限定第四电极212是否透明，即第四电极212可以为透明电极也可以为不透光的电极。
在示例性的实施例中，如图4所示，发光结构1与感光结构21的沿与结构平面垂直的方向上的投影重合。
光学指纹识别装置还包括第一绝缘层3，该第一绝缘层3位于第二电极12和第三电极211之间且第一绝缘层3为透明绝缘层。
同样，由于透过通孔100的光线需要穿过第一绝缘层3才可以被感应层213接收，因此上述实施例中的第一绝缘层3也需要由透明材料制作形成。
通过使发光结构1与感光结构21的沿与结构平面垂直的方向上的投影重合，可以减少发光结构1与感光结构21占用显示面板的面积，进而提升显示面板的开口率。
根据一个示例性的实施例，参照图5所示，控制结构22可包括：有源层221、覆盖有源层221的第二绝缘层222、设置于第二绝缘层上的栅金属层、覆盖栅金属层的第三绝缘层223、覆盖第三绝缘层223的隔离层224、设置于隔离层上的源漏金属层、覆盖源漏金属层的钝化层225以及位于钝化层上的导电电极226。
源漏金属层包括：源极51、漏极52以及数据线(图5中未示出)；栅金属层包括：栅极53以及与栅极51相接触的栅线(图5中未示出)；源极51和漏极52通过贯穿隔离层224、第三绝缘层223以及第二绝缘层222的过孔与有源层221接触；数据线与漏极52接触；导电电极226通过贯穿钝化层的过孔与源极51相接触；导电电极226还与第四电极212相接触。
由上述图4和图5可知：本公开的实施例中的光敏感应2的感光结构21和控制结构22可以分别为集成于显示面板的光敏二极管和薄膜晶体管。 该感光结构21和控制结构22所形成的结构的等效电路图如图6所示，其中，光敏二极管的阴极连接薄膜晶体管22的源极51，薄膜晶体管22的漏极通过数据线连接电流检测结构23。
在进一步的示例性实施例中，参照图7所示，感光结构21和控制结构22均集成或设置于显示面板的阵列基板70上。在该述实施例中，通过进一步将感光结构21和控制结构22集成或设置在显示面板的阵列基板70上，可以将光学指纹识别装置集成在显示面板中，进而在节省光学指纹识别装置的制造成本的同时，使显示面板具有光学指纹识别功能。
根据本公开的另一方面，还提供了一种显示面板，其包括上述任一实施例提供的光学指纹识别装置。
根据各种的实施例，显示面板具体可以是电子纸、手机、平板电脑、电视机、显示器、笔记本电脑、数码相框、导航仪等任何具有显示功能的产品或部件的显示面板。
在示例性的实施例中，所述显示面板可以是有机发光显示面板(OLED)或液晶显示面板(LCD)。
在示例性的实施例中，光学指纹识别装置设置于显示面板的有效显示(Active Area或AA)区域内。
在示例性的实施例中，光学指纹识别装置设置于显示面板的边框区域内。
以上，仅为本公开提供的一种示例性的实施方式，本公开的保护范围并不局限于此，任何熟悉本技术领域的技术人员在不背离本公开的精神和实质的前提下做出的变化或替换，都应落入本公开的保护范围。因此，本公开的保护范围应以权利要求的保护范围为准。

Claims (11)

  1. 一种光学指纹识别装置，包括：
    发光结构，所述发光结构包括：
    透明的第一电极；
    不透明的第二电极；
    设置于所述第一电极和所述第二电极之间的电致发光层；和
    贯穿所述第一电极、所述电致发光层以及所述第二电极的通孔；和
    光敏感应器，所述光敏感应器设置在所述发光结构的靠近第二电极的一侧，并用于接收透射过所述通孔的光线，并根据接收到的光线获取指纹信息。
  2. 根据权利要求1所述的光学指纹识别装置，其中，所述光敏感应器包括：
    感光结构，所述感光结构用于接收透射过所述通孔的光线，并根据接收到的光线产生感应电流；
    电流检测结构，所述电流检测结构用于检测所述感光结构产生的感应电流并根据所述感光结构产生的感应电流获取指纹信息；和
    控制结构，所述控制结构连接所述感光结构和所述电流检测结构，用于控制所述感光结构与所述电流检测结构的连接或断开。
  3. 根据权利要求2所述的光学指纹识别装置，其中，所述感光结构包括：
    透明的第三电极；
    设置在所述第三电极的背离所述发光结构的一侧的第四电极；和
    设置在所述第三电极和所述第四电极之间的感应层。
  4. 根据权利要求2所述的光学指纹识别装置，其中，所述发光结构与所述感光结构的沿与发光结构与感光结构所在的平面垂直的方向上的投影重合；并且
    所述光学指纹识别装置还包括第一绝缘层，所述第一绝缘层位于所述第二电极和所述第三电极之间且所述第一绝缘层为透明绝缘层。
  5. 根据权利要求2所述的光学指纹识别装置，其中：
    所述控制结构包括：有源层、覆盖所述有源层的第二绝缘层、设置于所述第二绝缘层上的栅金属层、覆盖所述栅金属层的第三绝缘层、覆盖所述第三绝缘层的隔离层、设置于所述隔离层上的源漏金属层、覆盖所述源漏金属层的钝化层以及位于所述钝化层上的导电电极；
    所述源漏金属层包括源极、漏极以及数据线；
    所述栅金属层包括栅极以及与所述栅极相接触的栅线；
    所述源极和所述漏极通过贯穿所述隔离层、第三绝缘层以及所述第二绝缘层的过孔与所述有源层接触；
    所述数据线与所述漏极接触；
    所述导电电极通过贯穿所述钝化层的过孔与所述源极相接触；并且
    所述导电电极还与所述第四电极相接触。
  6. 根据权利要求5所述的光学指纹识别装置，其中，所述感光结构和所述控制结构均集成于显示面板的阵列基板上。
  7. 根据权利要求1所述的光学指纹识别装置，其中，所述通孔的径向截面为圆形或者正方形或者菱形。
  8. 一种显示面板，包括权利要求1-7中任一项所述的光学指纹识别装置。
  9. 根据权利要求8所述的显示面板，其中，所述显示面板为有机发光显示面板或液晶显示面板。
  10. 根据权利要求8所述的显示面板，其中，所述光学指纹识别装置设置于所述显示面板的有效显示区域。
  11. 根据权利要求8所述的显示面板，其中，所述光学指纹识别装置设置于所述显示面板的边框区域。
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