WO2022233180A1 - 光学感测装置 - Google Patents

光学感测装置 Download PDF

Info

Publication number
WO2022233180A1
WO2022233180A1 PCT/CN2022/079225 CN2022079225W WO2022233180A1 WO 2022233180 A1 WO2022233180 A1 WO 2022233180A1 CN 2022079225 W CN2022079225 W CN 2022079225W WO 2022233180 A1 WO2022233180 A1 WO 2022233180A1
Authority
WO
WIPO (PCT)
Prior art keywords
light
optical sensing
sensing device
emitting units
circuit wiring
Prior art date
Application number
PCT/CN2022/079225
Other languages
English (en)
French (fr)
Inventor
周正三
范成至
Original Assignee
神盾股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 神盾股份有限公司 filed Critical 神盾股份有限公司
Publication of WO2022233180A1 publication Critical patent/WO2022233180A1/zh

Links

Images

Classifications

    • 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
    • H10K59/80—Constructional details
    • H10K59/8791—Arrangements for improving contrast, e.g. preventing reflection of ambient light
    • H10K59/8792—Arrangements for improving contrast, e.g. preventing reflection of ambient light comprising light absorbing layers, e.g. black layers
    • G—PHYSICS
    • G02—OPTICS
    • G02B—OPTICAL ELEMENTS, SYSTEMS OR APPARATUS
    • G02B5/00—Optical elements other than lenses
    • G02B5/20—Filters
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L27/00—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate
    • H01L27/14—Devices consisting of a plurality of semiconductor or other solid-state components formed in or on a common substrate including semiconductor components sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation
    • H01L27/144—Devices controlled by radiation
    • H01L27/146—Imager structures
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
    • H01L31/00—Semiconductor devices sensitive to infrared radiation, light, electromagnetic radiation of shorter wavelength or corpuscular radiation and specially adapted either for the conversion of the energy of such radiation into electrical energy or for the control of electrical energy by such radiation; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
    • H01L31/02—Details
    • H01L31/0232—Optical elements or arrangements associated with the device

Definitions

  • the present application relates to an optical sensing device, and more particularly, to an optical sensing device using a polarizer-free display panel.
  • CMOS Complementary Metal-Oxide Semiconductor
  • CIS Complementary Metal-Oxide Semiconductor
  • the miniaturized optical imaging device is arranged under the screen, especially under the organic light emitting diode (Organic Light Emitting Diode, OLED) screen, through the partially transparent structure of the screen, the image of the object pressing on the top of the screen can be captured, especially It is a fingerprint image, and achieves the function of under-screen fingerprint sensing (Fingerprint On Display, FOD), in which the partially light-transmitting structure of the screen includes the gap between exposed metal lines, and the light transmittance is usually 1% to 7%, depending on Depends on screen design and resolution.
  • OLED Organic Light Emitting Diode
  • a polarizer is usually arranged above the OLED to reduce the reflection intensity of the external strong light (such as sunlight) irradiating the screen, and also let the light entering the screen be blocked by the metal lines ( Including thin film transistor-related metal circuits and metal electrodes, etc.), the reflection intensity is reduced to achieve the function of anti-glare and ensure that the screen maintains a clear display quality.
  • polarizers will increase the thickness of the entire display screen, especially the new generation of foldable screens. The existence of polarizers will affect the reliability of folding and also affect the efficiency of energy use.
  • an object of the present application is to provide an optical sensing device, which can pattern the filter layer on the light-emitting unit of the non-polarized display panel to form light holes aligned with the light-transmitting gaps in the wiring area, so as to achieve The function of under-screen optical sensing.
  • an optical sensing device which at least comprises: a substrate; at least one circuit wiring layer, located on the substrate; a plurality of light-emitting units, arranged on the circuit wiring layer; a filter layer, There are a plurality of first light blocking parts, which are respectively arranged above the plurality of pixel gaps between the plurality of light-emitting units, and have a plurality of light holes, and the plurality of light holes are aligned with the plurality of the circuit wiring layers.
  • a light-transmitting gap and the size of each light hole is smaller than or equal to the size of a corresponding one of the plurality of light-transmitting gaps; and an optical sensor disposed below the substrate.
  • the patterning process of the filter layer made of black photoresist can be used to make the light holes of the filter layer, and the light holes can be aligned with the light transmission gaps in the wiring area to match the optical
  • the optical path design of the sensor can perform under-screen optical sensing without the use of polarizers, which can solve the problem of glare, and does not affect the reliability of folding.
  • FIG. 1 shows a schematic diagram of an optical sensing device according to a preferred embodiment of the present application.
  • FIG. 2 shows a partial schematic diagram of the optical sensing device of FIG. 1 .
  • FIG. 3 shows a partial schematic diagram of a modification of the optical sensing device of FIG. 2 .
  • FIG. 4 shows a partial schematic diagram of another variation of the optical sensing device of FIG. 2 .
  • one solution is to remove the polarizer, so as to reduce the loss of light in the optical path and provide a more energy-saving effect.
  • the polarizer above the OLED is removed, the anti-glare function becomes a major problem, so a filter layer (such as a black film layer) can be added to cover the exposed metal line area, greatly reducing the reflection glare. strength.
  • the transmittance of the OLED screen in the exposed metal circuit area will also greatly reduce the transmittance of the OLED screen in the exposed metal circuit area (for example, less than 1% or approaching 0%), which will limit the optical under-screen sensing, where the optical under-screen sensing Including optical biometrics (face shape, fingerprint, finger vein, blood oxygen, heart rate, iris, etc.) sensors and other optical sensors set under the screen, such as proximity sensor (Proximity Sensor), ambient light sensor (Ambient Light Sensor) , even the camera (Camera) and so on. Therefore, it is necessary to further design and plan the metal lines in the wiring area of the additional filter layer and the circuit wiring layer below it. In addition to maintaining the anti-glare function, you can also increase the screen (or display panel) The light transmittance (preferably greater than 1%, greater than 0.5% or greater than 0.3%) meets the requirements of fingerprint sensing under the optical screen.
  • optical biometrics face shape, fingerprint, finger vein, blood oxygen, heart rate, iris, etc.
  • the embodiments of the present application mainly provide a non-polarizer type display panel structure, which can not only prevent glare from affecting the displayed information, but is also suitable for local or global under-screen optical sensing.
  • the light-transmitting gaps in the line area (or the blank area of the circuit of interest) are patterned on the filter layer above the light-emitting unit to form light holes corresponding to (for example, aligned with) these light-transmitting gaps, providing an under-screen type
  • the light-transmitting channel for optical sensing and the patterned filter layer can still block most of the metal lines (to avoid reflective glare), which can realize a polarizer-free display panel suitable for under-screen optical sensing.
  • FIG. 1 shows a schematic diagram of an optical sensing device according to a preferred embodiment of the present application.
  • FIG. 2 shows a partial schematic diagram of the optical sensing device of FIG. 1 .
  • the present embodiment provides an optical sensing device 300 , which at least includes a non-polarizer display panel 100 and an optical sensor 200 .
  • the optical sensor 200 is disposed below the display panel 100 for sensing the light to be measured L2 from an object F above the display panel 100 .
  • the display panel 100 emits light L1 to illuminate the object F in a sensing mode, and the object F reflects the light L1 to generate the light to be measured L2 .
  • the light illuminating the object F may be from an additional light source (not shown) disposed below or on the side of the display panel 100 , or ambient light (eg, sunlight or indoor lighting, etc.). Therefore, the light illuminating the object F may be visible light or invisible light such as infrared light.
  • the area of the display panel 100 is larger than that of the optical sensor 200 , that is, the optical sensing device 300 provides a local optical sensing function.
  • the area of the display panel 100 may be equal to the area of the optical sensor 200 to provide a global optical sensing function.
  • the optical sensing device 300 is described by taking a fingerprint sensor as an example, but the present application is not limited to this.
  • the optical sensing device 300 can also sense the finger vein, the blood vessel image of the finger, and the blood oxygen concentration. , heart rate and other biometrics, it can also sense whether it is close to an object (such as a proximity sensor), and it can also be used as a camera to sense features such as face shape, iris, and so on.
  • the display panel 100 at least includes a substrate 10 , at least one circuit wiring layer 20 , a plurality of light emitting units 30 and at least one filter layer 40 (absorbing incident external strong light).
  • the circuit wiring layer 20 is located on the substrate 10 and includes a plurality of circuit regions 21 , a plurality of electrodes 22 and a plurality of wiring regions 23 for achieving predetermined electrical connections.
  • the circuit area 21 can be provided with a plurality of thin film transistors (Thin-Film Transistor, TFT) as switches, and of course other active or passive elements can also be provided to achieve predetermined circuit functions.
  • TFT Thin-Film Transistor
  • the circuit area 21 and the electrodes 22 of the entire circuit wiring layer 20 cannot be set to have a light-transmitting gap, while the wiring area 23 can be designed to have a light-transmitting gap.
  • the wiring method can achieve a predetermined electrical connection method between the circuit region 21 and the electrode 22, and at the same time, using these wiring methods, a plurality of light-transmitting gaps 20G are designed to meet the requirements of the sensing optical path.
  • the plurality of light emitting units 30 are disposed on the circuit wiring layer 20 and are electrically connected to the plurality of electrodes 22 of the circuit wiring layer 20 for emitting light L1 to be transmitted upward.
  • the filter layer 40 disposed above the light emitting unit 30 has a plurality of light holes 40G.
  • the filter layer 40 has a plurality of first light blocking portions 40B, which are respectively disposed above the plurality of pixel gaps 30G between the plurality of light emitting units 30 and provide a partial light blocking function.
  • the plurality of first light blocking portions 40B are patterned to have the plurality of light holes 40G, and the arrangement of the plurality of light holes 40G may be regular or random, as long as they can correspond or align
  • the plurality of light-transmitting gaps 20G are sufficient to provide a plurality of optical paths OC that can reach the optical sensor 200 through the plurality of light holes 40G and the plurality of light-transmitting gaps 20G, so that the light to be measured L2 from the outside is Downward transmission through the plurality of light holes 40G and the plurality of light transmission gaps 20G, so that the optical sensor 200 can pass through the plurality of light transmission gaps 20G, the plurality of pixel gaps 30G and the plurality of light holes 40G performs optical sensing.
  • the size of each light hole 40G is smaller than or equal to the size of the light transmission gap 20G corresponding to each light hole 40G.
  • the size of the light hole 40G is smaller than or equal to the size of the light transmission gap 20G to meet the requirements of the sensing light path, while matching
  • the plurality of light holes 40G may have different shapes (including but not limited to square, rectangular, circular, elliptical and irregular shapes).
  • the filter layer 40 further includes at least one second light blocking portion 40C, the second light blocking portion 40C does not have a light hole and is disposed outside the coverage of the optical sensor 200 , for example, is disposed in the optical sensor 200 . Or at least one side (including the peripheral edge) of the plurality of first light blocking portions 40B.
  • the circuit wiring layer 20 may also have other light-transmitting gaps (not shown) that will not be used for biological sensing. When the light to be measured L2 or the ambient light L3 passes through the When the other light-transmitting gaps are used, they are still blocked by the filter layer 40 .
  • the existing product can also be modified into an optimized configuration according to the wiring pattern of the wiring area of the region of interest where optical sensing is to be performed, so that the light transmission gap is 20G
  • the size distribution range is optimized to improve light transmittance, and the wiring pattern of the wiring area of the area where optical sensing is not performed can be unchanged, so that the area of interest (the wiring area of the area where optical sensing is performed)
  • the modified wiring pattern of differs from the wiring pattern of other areas (the wiring area of the area where optical sensing is not performed) in order to provide optimized light transmittance.
  • the wiring pattern of the circuit wiring layer 20 directly under the second light blocking portion 40C is different from the wiring pattern directly under the first light blocking portion 40B that needs to correspond to the light transmitting gap 20G because it does not need to correspond to the light transmission gap.
  • the wiring pattern of the circuit wiring layer 20 It can be understood that when a brand-new product is redesigned, the configuration can also be performed according to the characteristics of the above-mentioned different wiring patterns.
  • the display panel 100 is an OLED display panel
  • the substrate 10 is a glass or a polymer substrate
  • the light-emitting unit 30 is an OLED, which can be red, green and blue OLEDs
  • the filter layer 40 can be a black photoresist.
  • the manufactured black matrix (Black Matrix, BM) layer provides the function of partial light transmission.
  • the light-transmitting gap of the Ultra-High-Definition (UHD) display panel can be made to 1 to 3 microns, while the light-transmitting gap of the Ultra-High-Definition (FHD) display panel
  • the gap can be made to 3 to 5 micrometers, so the size of the light hole 40G produced by the lithography resolution of the BM layer of the present application is about 1 to 5 micrometers (design according to the specifications of the display panel 100 ).
  • the plurality of light holes 40G have a single size to match the different sizes of the plurality of light transmission gaps 20G. In another example, the plurality of light holes 40G have different sizes to match the different sizes of the plurality of light transmission gaps 20G. In yet another example, the number of the plurality of light holes 40G corresponds to the number of the plurality of light transmission gaps 20G, such as a one-to-one correspondence.
  • the above-mentioned display panel 100 may further include a transparent electrode layer 50 disposed between the filter layer 40 and the plurality of light-emitting units 30 and electrically connected to the plurality of light-emitting units 30 .
  • the material of the transparent electrode layer 50 is, for example, Indium Tin Oxide (ITO), which is the common anode of the OLED, and cooperates with the above-mentioned electrode 22 as the cathode to allow the OLED to emit light in a power-on state.
  • ITO Indium Tin Oxide
  • partial under-screen optical sensing is provided, so the first light blocking portion 40B has the plurality of light holes 40G to allow the light to be measured L2 to pass through, while the second light blocking portion has the plurality of light holes 40G.
  • 40C does not have a light hole to block the light to be measured L2 and the ambient light L3.
  • FIG. 3 shows a partial schematic diagram of a modification of the optical sensing device 300 of FIG. 2 .
  • the filter layer 40 may further include a filter portion 45 disposed above the transparent electrode layer 50 and the plurality of light emitting units 30 for filtering the light L1, wherein the plurality of filter portions 45 and the plurality of first light blocking portions 40B are arranged alternately, and in this example, they are arranged on the same plane.
  • the filter portion 45 and the filter layer 40 are disposed on different planes.
  • a protective layer or other functional layers, such as a touch layer, may be disposed above the filter portion 45 .
  • the filter part 45 has a plurality of filter structures 45R, 45G and 45B arranged at intervals for filtering out the light L1 of different wavelengths.
  • the filter portion 45 has a red filter structure 45R, a green filter structure 45G, and a blue filter structure 45B, which correspond to the red, green, and blue light emitting units 30 below, respectively, so as to prevent the adjacent light emitting units 30 from emitting different light. Interference of colors of light.
  • FIG. 4 shows a partial schematic diagram of another modification of the optical sensing device 300 of FIG. 2 .
  • the display panel 100 further includes a plurality of pixel definition parts 60 , which are respectively disposed in the plurality of pixel gaps 30G for separating the plurality of light-emitting units 30 , and each pixel definition part 60 has at least one first
  • the two light holes 61 allow the light L2 to be measured to pass through. That is, the plurality of optical paths OC pass through the plurality of second optical holes 61 .
  • the pixel defining portion 60 is formed of a black material, so as to avoid interference of lights of different wavelengths emitted by adjacent light-emitting units 30 .
  • the size of the second light hole 61 is smaller than or equal to the size of the corresponding light hole 40G and the size of the light transmission gap 20G. It can be understood that, in another example, some features of FIG. 4 and FIG. 3 can also be integrated, so that the display panel 100 includes the pixel defining part 60 and the filter part 45 .
  • the patterning process of the filter layer can be used to fabricate the light holes of the filter layer with different configurations, and the light holes can be corresponding to or aligned with the light transmission gaps in the wiring area,
  • the optical sensor under-screen optical sensing can be performed, and the problem of glare can be solved without the use of polarizers, and the energy use efficiency can be improved.
  • an OLED display panel can be replaced with a miniature light-emitting diode display panel.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Power Engineering (AREA)
  • Microelectronics & Electronic Packaging (AREA)
  • Computer Hardware Design (AREA)
  • Electromagnetism (AREA)
  • Condensed Matter Physics & Semiconductors (AREA)
  • Human Computer Interaction (AREA)
  • Multimedia (AREA)
  • Theoretical Computer Science (AREA)
  • Optics & Photonics (AREA)
  • Electroluminescent Light Sources (AREA)
  • Photometry And Measurement Of Optical Pulse Characteristics (AREA)

Abstract

一种光学感测装置包含：一基板；一电路配线层，位于基板上；多个发光单元，设置于电路配线层上，用于发出光线；一滤光层，具有多个第一阻光部，分别设置于所述多个发光单元之间的多个像素间隙的上方，并具有多个光孔，所述多个光孔对准电路配线层的多个透光间隙，且各光孔的尺寸小于或等于所述多个透光间隙的对应的其中一个的尺寸；及一光学传感器，设置于基板的下方，以执行无偏光片的屏下式光学感测。

Description

光学感测装置 技术领域
本申请是有关于一种光学感测装置，且特别是有关于一种使用无偏光片式显示面板的光学感测装置。
背景技术
例如手机、平板电脑、笔记本电脑等等的移动电子装置通常配备有使用者生物识别系统，包括了例如指纹、脸型、虹膜等等不同感测技术，用以保护个人数据安全，其中例如应用于手机或智能型手表等便携型装置，也兼具有行动支付的功能，对于使用者生物识别更是变成一种标准的功能，而手机等便携型装置更是朝向全屏幕或超窄边框的趋势发展，使得传统电容式指纹按键无法再继续被使用，取而代之的是微小化光学成像装置，有些非常类似传统的相机模块，具有互补式金属氧化物半导体(Complementary Metal-Oxide Semiconductor(CMOS)Image Sensor(简称CIS))感测元件及光学镜头模块。将微小化光学成像装置设置于屏幕下方，特别是有机发光二极管(Organic Light Emitting Diode，OLED)屏幕的下方，透过屏幕部分透光的结构，可以撷取按压于屏幕上方的物体的图像，特别是指纹图像，而达成屏幕下指纹感测(Fingerprint On Display，FOD)的功能，其中屏幕部分透光的结构包含暴露金属线路相互间的空隙，其透光率通常为1％至7％，视屏幕的设计及解析度而定。
在传统的OLED屏幕的结构中，通常会在OLED上方设置一偏光片，让照射在屏幕的外界强光(例如太阳光)的反射强度降低，也让进入屏幕的光线被OLED内的金属线路(包含薄膜晶体管相关的金属线路及金属电极等等)反射的强度降低，以达到防眩光的功能，确保屏幕保持清晰的显示品质。但是偏光片会增加整个显示屏幕的厚度，特别是新一代的折叠式屏幕，偏光片的存在更会影响折叠的可靠度，同时也会影响能量使用效率。
发明内容
因此，本申请的一个目的是提供一种光学感测装置，针对无偏光式显示面板的发光单元上的滤光层予以图案化而形成对准配线区中的透光间隙的光孔，达成屏下式光学感测的功能。
为达上述目的，本申请提供一种光学感测装置，至少包含：一基板；至少一电路配线层，位于基板上；多个发光单元，设置于电路配线层上；一滤光层，具有多个第一阻光部，分别设置于所述多个发光单元之间的多个像素间隙的上方，并具有多个光孔，所述多个光孔对准电路配线层的多个透光间隙，且各光孔的尺寸小于或等于所述多个透光间隙的对应的其中一个的尺寸；以及一光学传感器，设置于基板的下方。
借由上述的实施例，可以利用黑色光阻所制作出的滤光层的图案化工艺，制作出滤光层的光孔，并使光孔对准配线区中的透光间隙，配合光学传感器的光路设计可以执行屏下式光学感测，且不需要使用偏光片而可解决眩光的问题，且不影响折叠的可靠度。
为让本申请的上述内容能更明显易懂，下文特举较佳实施例，并配合所附图式，作详细说明如下。
附图说明
图1显示依据本申请较佳实施例的光学感测装置的示意图。
图2显示图1的光学感测装置的局部示意图。
图3显示图2的光学感测装置的一变化例的局部示意图。
图4显示图2的光学感测装置的另一变化例的局部示意图。
附图说明：
F:物体
L1:光线
L2:待测光
L3:环境光
OC:光路
10:基板
20:电路配线层
20G:透光间隙
21:电路区
22:电极
23:配线区
30:发光单元
30G:像素间隙
40:滤光层
40B:第一阻光部
40C:第二阻光部
40G:光孔
45:滤光部
45R,45G,45B:滤光结构
50:透明电极层
60:像素定义部
61:第二光孔
100:显示面板
200:光学传感器
300:光学感测装置
具体实施方式
为解决上述偏光片的问题，一种解决方式是移除偏光片，以降低光线在光路的损耗，提供更节能的效果。当OLED上方的偏光片被拿掉时，防眩光功能会变成主要的问题，因此，可以增加一层滤光层(例如黑膜层)以覆盖住暴露的金属线路区域，大幅降低反射眩光的强度。然而此举也会让OLED屏幕在暴露金属线路区域的透光率大幅降低(譬如是小于1％或趋近于0％)，这将使得光学屏下感测受到限制，其中光学屏下感测包含设置于屏下的光学生物识别(脸型、指纹、指静脉、血氧、心跳心率、虹膜等等)传感器及其他光学传感器，例如接近式传感器(Proximity Sensor)、环境光传感器(Ambient Light Sensor)、甚至是照相机(Camera)等等。因此，必须要对增设的滤光层及其下方的电路配线层的配线区中的金属线路作进一步设计规划，除了维持防眩光的功能外，还可以增加屏幕(或称显示面板)的透光率(较佳是大于1％，大于0.5％或大于0.3％)以符合光学屏下指纹感测的需求。
本申请的实施例主要是提供一种无偏光片式显示面板结构，不但能防眩光影响显示的信息，也适用于局部或全局屏下式光学感测，依据显示面板的电路配线层的配线区中的透光间隙(或称感兴趣的电路空白区)，将发光单元上方的滤光层予以图案化而形成对应(譬如是对准)这些透光间隙的光孔，提供屏下式光学感测用的透光通道，加上图案化 滤光层仍可以遮住大部分金属线路(避免反射眩光)，可以实现适用于屏下式光学感测的无偏光片式显示面板。
图1显示依据本申请较佳实施例的光学感测装置的示意图。图2显示图1的光学感测装置的局部示意图。如图1与图2所示，本实施例提供一种光学感测装置300，其至少包含一个无偏光片式显示面板100以及一光学传感器200。光学传感器200设置于显示面板100的下方，用于感测来自显示面板100上方的一物体F的待测光L2。于一使用例中，显示面板100在一感测模式下发出光线L1照射物体F，物体F反射光线L1而产生待测光L2。于另一例中，照射物体F的光线可以是来自设置在显示面板100的下方或侧边的额外光源(未显示)，或者是环境光(例如太阳光或室内照明等等)。因此，照射物体F的光线可以是可见光或例如红外光的不可见光。
于本例中，显示面板100的面积大于光学传感器200的面积，也就是光学感测装置300提供局部的光学感测功能。于另一例中，显示面板100的面积可以等于光学传感器200的面积，以提供全局的光学感测功能。于本实施例中，光学感测装置300是以指纹传感器作为例子来说明，但是并未将本申请限制于此，光学感测装置300也可以感测指静脉、手指的血管图像、血氧浓度、心率等生物特征，也可以感测与物体是否接近(例如接近距离传感器)，也可以当作照相机使用来感测脸型、虹膜等等特征。
如图2所示，显示面板100至少包含一基板10、至少一电路配线层20、多个发光单元30以及至少一滤光层40(吸收入射的外界强光)。电路配线层20位于基板10上，并包含达成预定电连接的多个电路区21、多个电极22及多个配线区23。电路区21中可设置有多个薄膜晶体管(Thin-Film Transistor,TFT)当作开关用，当然也可以设置有其他主动或被动元件，达成预定的电路功能。整个电路配线层20的电路区21与电极22由于功能上的需求，无法被设置成具有透光间隙，而配线区23可以被设计成具有透光间隙，借由上下不同层配线的走线方式，可以达成电路区21与电极22的预定电连接方式，同时利用这些走线方式，设计出多个透光间隙20G来达成感测光路的需求。
多个发光单元30设置于电路配线层20上，并电连接至电路配线层20的所述多个电极22，用于发出光线L1朝上传输。设置于发光单元30上方的滤光层40具有多个光孔40G。于本例中，滤光层40具有多个第一阻光部40B，分别设置于所述多个发光单元30之间的多个像素间隙30G的上方，并且提供部分阻光的功能。所述多个第一阻光部40B被图案化成具有所述多个光孔40G，所述多个光孔40G的排列方式可以是有规则的，也可以是随机的，只要能对应或对准所述多个透光间隙20G即可，以提供通过所述多个光 孔40G及所述多个透光间隙20G且可以到达光学传感器200的多条光路OC，使得来自外界的待测光L2朝下传输通过所述多个光孔40G及所述多个透光间隙20G，让光学传感器200可以通过所述多个透光间隙20G、所述多个像素间隙30G及所述多个光孔40G执行光学感测。为了达成较佳的防眩光的功能，各光孔40G的尺寸小于或等于与各光孔40G对应的透光间隙20G的尺寸。于一例子中，在感测的一光路所通过的光孔40G及透光间隙20G中，光孔40G的尺寸小于或等于透光间隙20G的尺寸，以符合感测光路的需求，同时配合配线区23的设计，所述多个光孔40G可以具有不同的形状(包括但不限定为正方形、长方形、圆形、椭圆形以及不规则形状)。于本实施例中，滤光层40还包含至少一第二阻光部40C，第二阻光部40C不具有光孔，且设置于光学传感器200的涵盖范围以外，譬如是设置于光学传感器200或者所述多个第一阻光部40B的至少一侧(包含周缘)。可以理解的，电路配线层20除了具有透光间隙20G以外，亦可具有不会被生物感测利用到的其他透光间隙(图未示)，当待测光L2或环境光L3经过所述多个其他透光间隙时，仍然受到滤光层40遮挡。另一方面，若要从现有产品的配置来改良时，也可以根据所欲执行光学感测的感兴趣区域的配线区的走线图案进行修改成最佳化配置，让透光间隙20G的尺寸分布范围较为优化设计以提高透光率，而不执行光学感测的区域的配线区的走线图案可以不作更动，使得感兴趣区域(执行光学感测的区域的配线区)的修改的走线图案，为了要提供优化的透光率而不同于其他区域(不执行光学感测的区域的配线区)的走线图案。亦即，第二阻光部40C正下方的电路配线层20的走线图案，因为不需对应至透光间隙而不同于需要对应至透光间隙20G的第一阻光部40B正下方的电路配线层20的走线图案。可以理解的，当进行全新产品的重新设计时，也可以依据上述不同的走线图案的特征进行配置。
于一非限制例中，显示面板100为OLED显示面板，基板10为玻璃或高分子基板，发光单元30为OLED，可以是红色、绿色及蓝色OLED，滤光层40可以是黑色光阻所制造出的黑色矩阵(Black Matrix，BM)层，提供部分透光的功能。于一例中，超高画质(Ultra-High-Definition，UHD)显示面板的透光间隙可以制作到1至3微米，而超高画质(Full-High-Definition，FHD)显示面板的透光间隙可以制作到3至5微米，因此本申请的BM层的光刻解析度制作出的光孔40G的尺寸大约是1至5微米(根据显示面板100的规格设计)。
于一例中，所述多个光孔40G具有单一尺寸，以配合所述多个透光间隙20G的不同尺寸。于另一例中，所述多个光孔40G具有多种不同的尺寸，以配合所述多个透光间隙 20G的不同尺寸。于又另一例中，所述多个光孔40G的数量对应所述多个透光间隙20G的数量，譬如一对一的对应方式。
上述显示面板100可以还包含一透明电极层50，设置于滤光层40与所述多个发光单元30之间，并且电连接至所述多个发光单元30。透明电极层50的材料例如是氧化铟锡(Indium Tin Oxide,ITO)，为OLED的共通阳极，配合上述作为阴极的电极22，可以让OLED在通电状态下发光。
在图2所示的例子中，提供的是局部屏下式光学感测，所以第一阻光部40B具有所述多个光孔40G，以让待测光L2通过，而第二阻光部40C不具有光孔，以阻挡待测光L2及环境光L3。
图3显示图2的光学感测装置300的一变化例的局部示意图。与图2具有相同元件符号之元件具有相同功能，在此不再赘述。如图3所示，滤光层40可以还包含一滤光部45，设置于透明电极层50及所述多个发光单元30的上方，用于过滤光线L1，其中所述多个滤光部45与所述多个第一阻光部40B交错设置，于本例中是设置在同一平面上。于另一例子中，滤光部45与滤光层40设置在不同平面上。滤光部45的上方可以设置有保护层或其他功能层，譬如触控层等。滤光部45具有多个间隔设置的滤光结构45R，45G，45B，用于滤除不同波长的光线L1。于一例中，滤光部45具有红色滤光结构45R、绿色滤光结构45G及蓝色滤光结构45B，分别对应下方的红色、绿色及蓝色发光单元30，以避免邻近发光单元30发出不同颜色的光线的相互干扰。
图4显示图2的光学感测装置300的另一变化例的局部示意图。与图2具有相同元件符号之元件具有相同功能，在此不再赘述。如图4所示，显示面板100还包含多个像素定义部60，分别设置于所述多个像素间隙30G中，用于分隔所述多个发光单元30，各像素定义部60具有至少一个第二光孔61让待测光L2通过。亦即，所述多个光路OC通过所述多个第二光孔61。于一例中，像素定义部60为黑色材料所形成，避免相邻发光单元30所发出的不同波长的光的干扰。于另一例子中，第二光孔61的尺寸小于或等于对应的光孔40G的尺寸及透光间隙20G的尺寸。可以理解的，于另一例子中，亦可整合图4与图3的部分特征，而让显示面板100包含像素定义部60及滤光部45。
借由上述实施例的光学感测装置，可以利用滤光层的图案化工艺，制作出不同配置的滤光层的光孔，并使光孔对应或对准配线区中的透光间隙，配合光学传感器可以执行屏下式光学感测，且不需要使用偏光片而可解决眩光的问题，并提高能量使用效率。
值得注意的是，上述所有实施例都可以适当的交互组合、替换或修改，以提供多样化的效果。譬如，可以将OLED显示面板替换为微型发光二极管显示面板。
在较佳实施例的详细说明中所提出的具体实施例仅用以方便说明本申请的技术内容，而非将本申请狭义地限制于上述实施例，在不超出本申请的精神及权利要求保护范围的情况下，所做的种种变化实施，皆属于本申请的范围。

Claims (13)

  1. 一种光学感测装置(300)，其特征在于，至少包含：
    一基板(10)；
    至少一电路配线层(20)，位于所述基板(10)上；
    多个发光单元(30)，设置于所述电路配线层(20)上；
    一滤光层(40)，具有多个第一阻光部(40B)，分别设置于所述多个发光单元(30)之间的多个像素间隙(30G)的上方，其中所述多个第一阻光部(40B)具有多个光孔(40G)，所述多个光孔(40G)对准所述电路配线层(20)的多个透光间隙(20G)，且各所述光孔(40G)的尺寸小于或等于所述多个透光间隙(20G)的对应的其中一个的尺寸；以及
    一光学传感器(200)，设置于所述基板(10)的下方。
  2. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述多个光孔(40G)具有多种不同尺寸，以配合所述多个透光间隙(20G)的不同尺寸。
  3. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述多个光孔(40G)的数量对应所述多个透光间隙(20G)的数量。
  4. 根据权利要求1所述的光学感测装置(300)，其特征在于，还包含一透明电极层(50)，设置于所述滤光层(40)与所述多个发光单元(30)之间，并且电连接至所述多个发光单元(30)。
  5. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述滤光层(40)还包含至少一第二阻光部(40C)，设置于所述多个第一阻光部(40B)的至少一侧，且所述第二阻光部(40C)不具有光孔。
  6. 根据权利要求5所述的光学感测装置(300)，其特征在于，所述第二阻光部(40C)正下方的所述电路配线层(20)的走线图案不同于所述第一阻光部(40B)正下方的所述电路配线层(20)的走线图案。
  7. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述滤光层(40)还包含多个滤光部(45)，设置于所述多个发光单元(30)的上方，且所述多个滤光部(45)与所述多个第一阻光部(40B)交错设置。
  8. 根据权利要求7所述的光学感测装置(300)，其特征在于，各所述滤光部(45)具有多个间隔设置的滤光结构(45R，45G，45B)，用于滤除不同波长的光线。
  9. 根据权利要求1所述的光学感测装置(300)，其特征在于，还包含：
    多个像素定义部(60)，分别设置于所述多个像素间隙(30G)中，用于分隔所述多个发光单元(30)，其中各所述像素定义部(60)具有至少一个第二光孔(61)。
  10. 根据权利要求9所述的光学感测装置(300)，其特征在于，所述第二光孔(61)的尺寸小于或等于对应的所述光孔(40G)的尺寸及所述透光间隙(20G)的尺寸。
  11. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述基板(10)、所述至少一电路配线层(20)、所述多个发光单元(30)及所述滤光层(40)属于一无偏光片式显示面板(100)，所述无偏光片式显示面板(100)具有大于0.3％的透光率。
  12. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述多个光孔(40G)具有不同形状。
  13. 根据权利要求1所述的光学感测装置(300)，其特征在于，所述基板(10)、所述至少一电路配线层(20)、所述多个发光单元(30)及所述滤光层(40)属于一无偏光片式显示面板(100)，且所述无偏光片式显示面板(100)的面积大于所述光学传感器(200)的面积。
PCT/CN2022/079225 2021-05-04 2022-03-04 光学感测装置 WO2022233180A1 (zh)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202163183837P 2021-05-04 2021-05-04
US63/183,837 2021-05-04

Publications (1)

Publication Number Publication Date
WO2022233180A1 true WO2022233180A1 (zh) 2022-11-10

Family

ID=81485530

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/079225 WO2022233180A1 (zh) 2021-05-04 2022-03-04 光学感测装置

Country Status (3)

Country Link
CN (2) CN216927655U (zh)
TW (2) TWM627534U (zh)
WO (1) WO2022233180A1 (zh)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TWM627534U (zh) * 2021-05-04 2022-05-21 神盾股份有限公司 光學感測裝置

Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201947286A (zh) * 2018-05-04 2019-12-16 李美燕 具有虛擬高深寬比光學準直器的影像感測器、電子裝置及其製造方法
CN110931538A (zh) * 2019-12-20 2020-03-27 武汉天马微电子有限公司 一种显示面板及电子设备
CN111564483A (zh) * 2020-05-21 2020-08-21 合肥维信诺科技有限公司 一种显示装置
CN111697039A (zh) * 2020-06-11 2020-09-22 合肥维信诺科技有限公司 一种显示面板及显示装置
US20210043692A1 (en) * 2019-08-09 2021-02-11 Samsung Display Co., Ltd. Display device
CN113327966A (zh) * 2021-05-31 2021-08-31 京东方科技集团股份有限公司 一种显示面板及其制备方法
CN114141837A (zh) * 2021-11-25 2022-03-04 武汉华星光电技术有限公司 一种oled显示模组及显示终端
CN114267701A (zh) * 2020-09-14 2022-04-01 京东方科技集团股份有限公司 显示面板、其制作方法及显示装置
CN114495186A (zh) * 2021-05-04 2022-05-13 神盾股份有限公司 光学感测装置

Patent Citations (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
TW201947286A (zh) * 2018-05-04 2019-12-16 李美燕 具有虛擬高深寬比光學準直器的影像感測器、電子裝置及其製造方法
US20210043692A1 (en) * 2019-08-09 2021-02-11 Samsung Display Co., Ltd. Display device
CN110931538A (zh) * 2019-12-20 2020-03-27 武汉天马微电子有限公司 一种显示面板及电子设备
CN111564483A (zh) * 2020-05-21 2020-08-21 合肥维信诺科技有限公司 一种显示装置
CN111697039A (zh) * 2020-06-11 2020-09-22 合肥维信诺科技有限公司 一种显示面板及显示装置
CN114267701A (zh) * 2020-09-14 2022-04-01 京东方科技集团股份有限公司 显示面板、其制作方法及显示装置
CN114495186A (zh) * 2021-05-04 2022-05-13 神盾股份有限公司 光学感测装置
CN113327966A (zh) * 2021-05-31 2021-08-31 京东方科技集团股份有限公司 一种显示面板及其制备方法
CN114141837A (zh) * 2021-11-25 2022-03-04 武汉华星光电技术有限公司 一种oled显示模组及显示终端

Also Published As

Publication number Publication date
TWM627534U (zh) 2022-05-21
TW202245240A (zh) 2022-11-16
CN114495186A (zh) 2022-05-13
CN216927655U (zh) 2022-07-08

Similar Documents

Publication Publication Date Title
CN108369135B (zh) 用于显示器中集成的光学传感器
TWI650875B (zh) 積體化感測模組、積體化感測組件及其製造方法
CN106373969B (zh) 显示基板和显示装置
CN109541842B (zh) 显示面板
US11424298B2 (en) Display panel and display device
WO2020082380A1 (zh) 指纹识别装置和电子设备
US20180096186A1 (en) Optical sensor with angled reflectors
CN109791325A (zh) 具有外围任务栏显示区的设备和用于屏上指纹感测的lcd屏下光学传感器模块
US11301707B2 (en) Texture recognition device and driving method of texture recognition device
TW201812642A (zh) 可變光場的生物影像感測系統
WO2020042283A1 (zh) 具有指纹识别装置的触控显示屏
WO2021203622A1 (zh) 屏内光学生物特征感测装置
WO2020232637A1 (zh) 纹路识别装置及其制造方法、彩膜基板及其制造方法
US10817698B2 (en) Touch display panel with fingerprint recognition device
WO2021249178A1 (zh) 显示面板和显示装置
WO2022233180A1 (zh) 光学感测装置
CN108695345B (zh) 图像传感器和成像模组
WO2021056318A1 (zh) 指纹识别的方法、装置和电子设备
WO2021258957A1 (zh) 纹路识别装置以及电子装置
WO2021217325A1 (zh) 纹路识别装置以及对向基板
WO2021258941A1 (zh) 纹路识别装置以及电子装置
WO2021056425A1 (zh) 滤光片、指纹检测的装置和电子设备
WO2021007971A1 (zh) 一种识别模组、显示面板
US11580771B2 (en) Image capturing apparatus
CN110941117B (zh) 一种显示面板及电子装置

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 22798522

Country of ref document: EP

Kind code of ref document: A1

NENP Non-entry into the national phase

Ref country code: DE

122 Ep: pct application non-entry in european phase

Ref document number: 22798522

Country of ref document: EP

Kind code of ref document: A1