WO2019134062A1 - 屏内光学指纹辨识的发光二极管面板 - Google Patents

屏内光学指纹辨识的发光二极管面板 Download PDF

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Publication number
WO2019134062A1
WO2019134062A1 PCT/CN2018/000058 CN2018000058W WO2019134062A1 WO 2019134062 A1 WO2019134062 A1 WO 2019134062A1 CN 2018000058 W CN2018000058 W CN 2018000058W WO 2019134062 A1 WO2019134062 A1 WO 2019134062A1
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WIPO (PCT)
Prior art keywords
light
substrate
optical
led panel
led
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PCT/CN2018/000058
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English (en)
French (fr)
Inventor
林哲玄
萧培宏
萧嘉源
叶俊宏
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敦捷光电股份有限公司
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Publication of WO2019134062A1 publication Critical patent/WO2019134062A1/zh

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    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06V—IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING
    • G06V40/00—Recognition of biometric, human-related or animal-related patterns in image or video data
    • G06V40/10—Human or animal bodies, e.g. vehicle occupants or pedestrians; Body parts, e.g. hands
    • G06V40/12—Fingerprints or palmprints
    • G06V40/13—Sensors therefor
    • G06V40/1318—Sensors therefor using electro-optical elements or layers, e.g. electroluminescent sensing
    • H—ELECTRICITY
    • H10—SEMICONDUCTOR DEVICES; ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR
    • H10K—ORGANIC ELECTRIC SOLID-STATE DEVICES
    • H10K59/00—Integrated devices, or assemblies of multiple devices, comprising at least one organic light-emitting element covered by group H10K50/00
    • H10K59/60—OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes

Definitions

  • the invention relates to an LED panel, in particular to an LED panel with optical fingerprint recognition, and the optical fingerprint identification is more integrated in the LED panel.
  • the fingerprint identification technology in development mainly includes semiconductor type, optical type and ultrasonic type.
  • semiconductor type and optical type are mature technologies, and the current mainstream fingerprint identification technology.
  • the principle of the semiconductor fingerprint sensor is to integrate a high-density capacitive sensor or a miniature sensor such as a pressure sensor into a chip. When the fingerprint is pressed against the surface of the chip, the internal miniature capacitive sensor is generated according to the peaks and valleys of the fingerprint. Different amounts of charge (or temperature difference) form a fingerprint image.
  • the optical fingerprint sensor uses a light source, an optical component, and a photoelectric sensor to form a set of fingerprint collection devices.
  • the finger is pressed, the peaks and troughs of the fingerprint absorb and destroy the total reflection, and a fingerprint image is obtained, and then the image is captured and output.
  • the optical acquisition method is the non-contact chip itself, that is, the fingerprint pressing portion is composed of optical components such as acrylic or glass, the optical advantage is that the price is low and durable.
  • fingerprint identification is usually set independently. Because the integrated display work and the fingerprint identification work cannot be performed at the same time, the fingerprint identification is independently set in an area, and some operators are set on the back cover or the side of the mobile device. Because the design is not ergonomic and often causes misunderstanding or difficulty in sensing, some operators have set fingerprint recognition on the non-touch area of the touch screen of the mobile device. The disadvantage is that if the mobile device is operated in the dark. When the fingerprint identification function is used, it is quite inconvenient that the fingerprint identification area has no illumination display.
  • the present invention utilizes the characteristics of the LED itself to emit light, and at the same time combines the technology of optical fingerprint identification to provide an LED panel for optical fingerprint recognition in the screen. It is embedded in the LED panel and has a unique light path design to greatly reduce the interference of the ambient light source and the strong light source in fingerprint recognition.
  • the main object of the present invention is to design a total reflection light path of directional light in a panel to provide an optical signal required for fingerprint recognition, so that fingerprint recognition can be effectively performed in any light interference environment.
  • a secondary object of the present invention is to integrate the light sensing element on the light emitting diode substrate and provide directional light through the light emitting diode, so that no additional light source is required.
  • Another object of the present invention is to use a photodiode as a light sensing element and integrate it into a light emitting diode substrate.
  • a further object of the present invention is to provide an optical fingerprinting LED panel, wherein most of the panel area is used as a fingerprint receiving area of the fingerprint, and the light sensing component is disposed in the light shielding layer area of the LED substrate.
  • a fingerprint recognition panel that can be displayed in full screen.
  • the present invention discloses an in-screen optical fingerprinting LED panel having a main display area and a sub-display area.
  • the in-screen optical fingerprint recognition LED panel of the present invention comprises an LED substrate. a light guide substrate and a light sensing component, the light emitting diode substrate has a plurality of light emitting diodes, and at least one light emitting diode is used to provide a directional light, and the fingerprint receiving area of the light guiding substrate is used for effective pressing by the finger.
  • the directional light from the light source enters the light guide substrate from the signal introduction area and is totally reflected and generates an optical signal, which leaves the light guide substrate from the signal lead-out area and enters into the light sensing element to convert the optical signal into an electrical signal.
  • the invention uses the light with specific directivity as the optical signal source for fingerprint identification, and ensures the transmission efficiency of the optical signal by means of total reflection, the in-screen fingerprint recognition function of the full screen display can be achieved, and at the same time
  • the light sensing element is substantially disposed corresponding to the light shielding layer region of the light emitting diode substrate, so that the original design of the LED panel is not affected, and the thinning of the LED panel can be maintained.
  • FIG. 1 is a cross-sectional view showing the structure of an LED panel for optical fingerprint recognition in the screen provided by the present invention.
  • Fig. 2a is a schematic cross-sectional view showing a partial structure of an optical element (grating) as an optical structure.
  • Fig. 2b is a schematic cross-sectional view showing a partial structure of a secondary element (Fresnel lens) as an optical structure.
  • Fig. 2c is a schematic cross-sectional view showing a partial structure of an optical microstructure as an optical structure.
  • FIG. 3 is a schematic cross-sectional view showing another structure of an in-screen optical fingerprinting LED panel according to the present invention.
  • FIG. 4 is a schematic cross-sectional view showing another structure of an LED for optical fingerprinting in the screen provided by the present invention.
  • FIG. 1 is a schematic cross-sectional view of a light emitting diode panel for in-screen optical fingerprint recognition provided by the present invention.
  • the LED panel 1a of the in-screen optical fingerprint has a main display area 32 and a sub-display area 34.
  • the LED panel 1a of the in-screen optical fingerprint recognition of the present invention comprises an LED substrate 14, a light guide substrate 12 and a light perception. Measuring element 16.
  • the LED substrate 14 has a plurality of LEDs 22, 24, and at least one of the LEDs 22 is used to provide directional light (shown in dashed lines), and the remaining LEDs 24 are used to provide an optical fingerprint panel for in-screen optical fingerprinting.
  • 1a shows the light required for the display. Therefore, the in-screen optical fingerprinting LED panel 1a provided by the present invention does not need to additionally provide a light source, but avoids providing sufficient display light to the main display area 32, and does not affect the display quality.
  • the preferred arrangement of the LEDs 22 for providing directional light substantially corresponds to the secondary display region 34.
  • the light used for fingerprint recognition has specific directivity light, so that the directional light (shown by the dashed line) can be specified.
  • the angle of the light enters the light guide substrate 12 to distinguish it from light or strong light from the environment, thereby ensuring the accuracy of fingerprint recognition.
  • the above-mentioned LED panel 14 can be an active organic light emitting diode substrate, a passive organic light emitting diode substrate, a millimeter light emitting diode substrate or a micro light emitting diode substrate.
  • the light emitting diodes 22 and 24 disposed thereon can be correspondingly Active organic light emitting diodes, passive organic light emitting diodes, millimeter light emitting diodes or micro light emitting diodes.
  • the light guide substrate 12 has a fingerprint receiving area 122, a signal introduction area 124, and a signal lead-out area 126.
  • the fingerprint receiving area 122 may include the entire display area of the LED panel 1a or a partial display area of the LED panel 1a, in other words, The fingerprint receiving area 122 may correspond to the main display area 32 of the LED panel 1a and at least part or all of the sub-display area 34, or the fingerprint receiving area 122 may correspond to the entire main display area 32 of the LED panel 1a, or the fingerprint receiving area.
  • the fingerprint receiving area 122 corresponds only to a portion of the main display area 32 of the LED panel 1a, wherein the main display area 32 is used to display important information such as, but not limited to, main function options, dialog windows, numeric button display areas, etc., and second display
  • the area 34 is used to display less important information, such as, but not limited to, time, date, temperature, or even an area that does not display any information to provide only a background picture or hidden in an off-screen area such as a dead band.
  • the fingerprint receiving area 122 includes all the main display areas 32 and the local area.
  • the signal introduction region 124 and the signal lead-out region 126 in the light guiding substrate 12 may be in the form of a mirror surface, a prism film, a grating or an optical fiber.
  • the light sensing element 16 can be disposed between the light emitting diode substrate 14 and the light guiding substrate 12 and substantially located on a light path of the directional light (shown by a broken line) away from the light guiding substrate 12.
  • the photo sensing element 16 is exemplified by a photo diode, and the photo sensing element 16 of the optical diode can be disposed in the LED substrate 12 between two adjacent LEDs 24 .
  • the light sensing element 16 is disposed in the light shielding layer region BM between the two adjacent light emitting diodes 24, so that the design does not need to additionally increase the installation space of the light sensing element 16, and does not affect the same.
  • the display efficiency to the light emitting diode panel 1a is exemplified by a photo diode, and the photo sensing element 16 of the optical diode can be disposed in the LED substrate 12 between two adjacent LEDs 24 .
  • the light sensing element 16 is disposed in the light shielding layer region BM between the two adjacent light emitting
  • the directional light (shown by a broken line) provided by the specific light-emitting diode 22 enters the light guide substrate 12 from the signal introduction region 124, and is totally reflected inside the light guide substrate 12 when the user
  • the path of the directional light (shown by the dashed line) is changed and an optical signal is simultaneously generated, and the directional light (shown by the broken line) leaves the light guiding from the signal deriving area 126.
  • the light sensing element 16 After the substrate 12, the light sensing element 16 enters the light sensing element 16, and the light sensing element 16 receives the energy of the directional light (shown by the broken line) to generate a voltage change, thereby converting the optical signal into an electrical signal and then passing through the optical processor ( The figure is not shown) to read the fingerprint feature of the user's finger FG. Since the optical signal of the fingerprint feature only occupies about 120-180 bytes, it can be selectively integrated into a single driving circuit together with a display processor (not shown) and a touch processor (not shown).
  • At least one optical structure 42 , 44 , 46 may be selectively disposed between the LED substrate 14 and the light guide substrate 12 such that the directional light (shown by the dashed line) provided by the LED 22 passes through the optical structures 42 , 44 .
  • the signal introduction region 124 of the light guide substrate 12 can be directly collimated or enter the signal introduction region 124 of the light guide substrate 12 with a specific incident angle.
  • the optical structures 42, 44, 46 can be used. Selected from optical components, secondary components, optical microstructures, and combinations thereof.
  • Fig. 2a, Fig. 2b and Fig. 2c three kinds of in-screen optical fingerprinting LED panels 1b, 1c, 1d are disclosed.
  • an optical component (grating) 42 is taken as an example.
  • the directional light from the light-emitting diode 22 (shown in dashed lines) is adjusted to incident light having a specific incident angle before entering the light-guiding substrate 12, while the secondary element (Fresnel lens, Fresnel lens) is disclosed in FIG. 2b.
  • 44 is an example in which the directional light from the light-emitting diode 22 (shown by a broken line) is adjusted to collimated incident light before entering the light guide substrate 12, and the light is introduced into the light guide substrate in a grooved manner.
  • the light guiding substrate may also be located at the edge of the light guiding substrate.
  • the optical micro structure 46 is taken as an example, and the directional light from the light emitting diode 22 (shown by the dashed line) enters and guides.
  • the light substrate 12 is previously adjusted to collimated incident light. It is noted that the type and structure of the optical structures 42, 44, 46 described above, and the incident of the final directional light (shown in phantom) entering the light guide substrate 12 are incident.
  • the directional light may also be incident on the light guiding substrate 12 at a collimated angle, and most importantly, the directional light from the light emitting diode 22 ( The dashed lines can be adjusted by the optical structures 42, 44, 46 to match the angle of incidence prior to entering the light directing substrate 12, as designed and desired.
  • the optical structures 42, 44, and 46 are shown as the independent structures, the optical structures 42, 44, and 46 may be integrated into the light guide substrate 12 in actual design.
  • FIG. 3 is a schematic cross-sectional view of another in-screen optical fingerprinting LED panel provided by the present invention.
  • different refractive indices are used to control the transmission of light into the light guiding substrate.
  • the refractive index 1 is the same as or close to the light guiding substrate, and the refractive index 2 is smaller than the light guiding substrate.
  • the photo sensing element 16 is an independent component and disposed under the light guiding substrate 12.
  • the LED panel 1f of the in-screen optical fingerprinting in the embodiment of the present invention further discloses a polarizing substrate 26 and a protective glass substrate 28 disposed between the light guiding substrate 12 and the LED substrate 14.
  • the polarizing substrate 26 and the protective glass substrate 28 may be selectively disposed.
  • the polarizing substrate 26 and the protective glass substrate 28 may be disposed at the same time or alternatively, or the polarizing substrate 26 and the protective glass substrate 28 may be integrated into a single structure.
  • the polarizing substrate 26 may be integrated into the single structure of the light guiding substrate 12, or the polarizing substrate 26, the protective glass substrate 28 and the light guiding substrate 12 may be integrated into a single structure.
  • the light guide substrate 12 can have total polarized light and protection functions in addition to providing directional light (shown by a broken line) for fingerprint recognition.
  • the LED panel for optical fingerprinting in the screen integrates the light sensing component that detects the fingerprint into the LED panel, and the total reflection in the light guiding substrate by the directional light. Inducing a fingerprint pressed in the fingerprint receiving area, and converting the optical signal into an electrical signal through the light sensing element to distinguish the characteristics of the fingerprint, in particular, the light sensing element formed by the photodiode can be integrated to integrate the light emitting diode substrate The area of the light-shielding layer does not reduce the display effect and quality of the panel.
  • the directional light can be adjusted by a specific optical microstructure before entering the light sensing element, and more preferably by a signal amplifying element (not shown) disposed between the light guiding substrate and the light sensing element. In order to maintain the intensity of the optical signal, to ensure the accuracy of fingerprint identification.
  • the in-screen optical fingerprinting LED panel provided by the present invention can be applied to various screen-equipped devices such as mobile devices, screens, televisions, etc., since the LED panel of the present invention has considerable fingerprint receiving.
  • the fingerprint can be easily identified by the user without being too deliberate. Whether it is a wake-up device or identification, the user's use of fingerprint protection function is enhanced because of the convenience of use.
  • the LED light-receiving LED panel provided by the present invention can make the fingerprint protection mechanism more function.

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Abstract

一种屏内光学指纹辨识的发光二极管面板(1a)，利用发光二极管(22)提供的指向性光线在导光基板(12)内以全反射的方式传导，以感应按压在指纹接收区域的指纹，由光感测元件(16)将光学信号转换为电气信号，以辨别指纹的特征。由于直接利用发光二极管做为光源，更可使用光电二极管做为光感测元件并整合在发光二极管面板的遮光层区域，因此无需增加基板的面积即可实现整合光感测元件的目的，另外，由于几乎整个导光基板的表面均可提供做为指纹触碰的面积，因而提升了使用的便利性。因指向性光线在进入至光感测元件之前可通过特定的光学微结构以调整光路径，因此在一般使用的情形下，环境的直射光或强光的影响可降到最低，以确保指纹辨识的准确度。

Description

屏内光学指纹辨识的发光二极管面板 技术领域
本发明涉及一种发光二极管面板，其特别关于一种具有光学指纹辨识的发光二极管面板，且光学指纹辨识更整合在发光二极管面板内。
背景技术
目前发展中的指纹辨识技术主要包含半导体式、光学式及超声波式，其中，半导体式与光学式为较成熟的技术，也是现行主流的指纹辨识技术。其中，半导体式指纹传感器的原理为将高密度的电容传感器或是压力传感器等微型化传感器整合于一芯片中，在指纹按压芯片表面时，内部微型电容传感器会根据指纹波峰与波谷聚集而产生的不同电荷量(或是温差)，形成指纹影像。光学式指纹传感器利用光源、光学元件、光电传感器共同组成一套指纹采集设备，利用手指按压，指纹的波峰与波谷对于全反射的吸收与破坏，得到一枚指纹影像，再将影像撷取与输出以达到判别的效果。由于光学式的采集方式是非接触芯片本身，也就是指纹按压处是由压克力或是玻璃等光学元件所构成，故光学式最大的优势就是价格低廉且耐用。
而目前的行动装置上通常是将指纹辨识独立设置，其因在于无法整合显示工作与指纹辨识工作同时进行，故将指纹辨识独立一区域设置，部分业者设置于行动装置背盖或侧边，如此的设计由于不太符合人体工学，经常造成误触或难以感应的窘境，因此有部分业者将指纹辨识设置于行动装置触控屏幕的非触控区域，而缺点在于，若在黑暗处操行动装置的指纹辨识功能时，该指纹辨识区域无照明显示则相当不便利。
随着发光二极管面板的技术发展渐趋成熟，本发明则利用发光二极管本身可发光的特性，并同时结合光学式指纹辨识的技术，以提供一种屏内光学指纹辨识的发光二极管面板，其可内嵌在发光二极管面板，且通过独特的光路径设计以大幅降低环境光源与强光源在指纹辨识时的干扰。
发明内容
本发明的主要目的在于将指向性光线的全反射光路径设计于面板内，以提 供指纹辨识时所需要的光信号，以在任何光线干扰的环境下，均可有效地进行指纹的辨识。
本发明的次要目的在于将光感测元件整合于发光二极管基板上，通过发光二极管提供指向性光线，故无需额外设置光源。
本发明的另一目的在于使用光电二极管做为光感测元件，并将其整合于发光二极管基板内。
本发明的再一目的在于提供一种光学指纹辨识发光二极管面板，大部分的面板面积用以做为指纹的指纹接收区域，同时搭配将光感测元件设置在发光二极管基板的遮光层区域，故可实现全屏显示的指纹辨识面板。
为达成上述目的及功效，本发明公开了一种屏内光学指纹辨识的发光二极管面板，其具有主显示区域与次显示区域，本发明的屏内光学指纹辨识的发光二极管面板包含一发光二极管基板、一导光基板及一光感测元件，发光二极管基板具有多个发光二极管，且至少一发光二极管用以提供一指向性光线，导光基板的指纹接收区域用以供手指进行有效的按压，来自光源的指向性光线自信号导入区域进入至导光基板并进行全反射并产生光学信号，终自信号导出区域离开导光基板，并进入至光感测元件内以将光学信号转换为电气信号以完成手指的指纹特征辨识。
由于本发明是将具有特定指向性的光线做为指纹辨识的光学信号光源，并通过全反射的方式以确保光学信号的传递有效性，故可达到全屏显示的屏内指纹辨识功效，同时通过将光感测元件实质地对应设置在发光二极管基板的遮光层区域，因此不但不影响发光二极管面板的原始设计，更可维持发光二极管面板薄化的特色。
附图说明
图1为本发明提供的一种屏内光学指纹辨识的发光二极管面板的结构截面示意图。
图2a为以光学元件(光栅)做为光学结构的局部结构截面示意图。
图2b为以二次元件(菲涅耳透镜，Fresnel lens)做为光学结构的局部结构截面示意图。
图2c为以光学微结构做为光学结构的局部结构截面示意图。
图3为本发明提供的另一种屏内光学指纹辨识的发光二极管面板的结构截 面示意图。
图4为本发明提供的再一种屏内光学指纹辨识的发光二极管面板的结构截面示意图。
附图标记说明：1a、1b、1c、1d、1f-屏内光学指纹辨识的发光二极管面板；12-导光基板；122-指纹接收区域；124-信号导入区域；126-信号导出区域；14-发光二极管基板；16-光感测元件；22-发光二极管；24-发光二极管；26-偏光基板；28-保护玻璃基板；32-主显示区域；34-次显示区域；42-光学结构(光栅)；44-光学结构(菲涅耳透镜)；46-光学结构(光学微结构)；FG-手指；BM-遮光层区域。
具体实施方式
本发明所采用的技术手段及其构造，兹绘图就本发明的较佳实施例详加说明其特征与功能如下。
首先请参照图1，其为本发明提供的一种屏内光学指纹辨识的发光二极管面板的结构截面示意图。屏内光学指纹辨识的发光二极管面板1a具有主显示区域32与次显示区域34，本发明的屏内光学指纹辨识的发光二极管面板1a包含一发光二极管基板14、一导光基板12及一光感测元件16。
发光二极管基板14具有多个发光二极管22、24，且其中至少一个发光二极管22用以提供指向性光线(虚线所示)，其余的发光二极管24则用以提供屏内光学指纹辨识的发光二极管面板1a显示时所需的光线，因此，本发明提供的屏内光学指纹辨识的发光二极管面板1a无须额外设置光源，不过为避免提供足够的显示光线予主显示区域32，同时也在不影响显示质量的前提下，用以提供指向性光线(虚线所示)的发光二极管22较佳的设置位置实质地对应次显示区域34。同时，本发明为避免光学式判断的指纹辨识受到环境光线或强光线的影响，因此用以做为指纹辨识的光线具有特定指向性的光线，以使指向性光线(虚线所示)能够以特定的角度进入至导光基板12，藉以与来自环境的光线或强光线有所区隔，可确保指纹辨识的准确度。
另外，上述的发光二极管面板14可为主动式有机发光二极管基板、被动式有机发光二极管基板、毫米发光二极管基板或微发光二极管基板，当然，设置于其上的发光二极管22、24则可对应地为主动式有机发光二极管、被动式有机发光二极管、毫米发光二极管或微发光二极管。
导光基板12则具有指纹接收区域122、信号导入区域124及信号导出区域126，其中的指纹接收区域122可包含了发光二极管面板1a整个的显示区域或发光二极管面板1a局部的显示区域，换言之，指纹接收区域122可对应至发光二极管面板1a的主显示区域32及至少局部或全部的次显示区域34、或指纹接收区域122可对应至发光二极管面板1a整个的主显示区域32、或指纹接收区域122仅对应至发光二极管面板1a的局部的主显示区域32，其中，主显示区域32用以显示重要的信息，例如但不限于主功能选项、对话窗口、数字按键显示区域等等，而次显示区域34则是用以显示较为次要的信息，例如但不限于时间、日期、温度、或甚至为未显示出任何信息仅提供背景画面的区域或隐藏在画面外区域如边框(dead band)，以本实施态样为例，指纹接收区域122包含了全部的主显示区32域及局部的次显示区域34。而导光基板12内的信号导入区域124及信号导出区域126可为镜面、棱镜薄膜、光栅或光纤的形式。
光感测元件16可设置发光二极管基板14与导光基板12之间，并实质地位于离开导光基板12的指向性光线(虚线所示)的光路径上。在本实施态样中，光感测元件16以光学二极管(photo diode)为例说明，且光学二极管的光感测元件16可设置在发光二极管基板12中，两相邻的发光二极管24之间，更详细来说，光感测元件16设置在两相邻的发光二极管24之间的遮光层区域BM，这样的设计，不但无须额外增设光感测元件16的设置空间，同时也不会影响到发光二极管面板1a的显示效率。
根据上述结构可知，由特定的发光二极管22所提供的指向性光线(虚线所示)自信号导入区域124进入至导光基板12后，并在导光基板12内部进行全反射，当使用者的手指FG在指纹接收区域122的范围内进行按压时，改变了指向性光线(虚线所示)的路径并同时产生一光学信号，当指向性光线(虚线所示)自信号导出区域126离开导光基板12后，进入至光感测元件16，光感测元件16因接受指向性光线(虚线所示)的能量进而产生电压的变化，因此将光学信号转换为电气信号，再经由光学处理器(图未显示)以判读出用户手指FG的指纹特征。而由于指纹特征的光学信号仅约占120～180字节，因此可选择性地与显示处理器(图未显示)、触控处理器(图未显示)一并整合为单一个驱动电路。
另外，发光二极管基板14与导光基板12之间可选择性地设置有至少一光学结构42、44、46，以使发光二极管22提供的指向性光线(虚线所示)经过光学结构42、44、46后，可准直地进入至导光基板12的信号导入区域124，或以具 有特定入射角度的方式进入至导光基板12的信号导入区域124，上述的光学结构42、44、46可选自光学元件、二次元件、光学微结构及其组合。在图2a、图2b及图2c中则公开三种屏内光学指纹辨识的发光二极管面板1b、1c、1d的态样，首先如图2a所示，其以光学元件(光栅)42为例，来自发光二极管22的指向性光线(虚线所示)在进入至导光基板12之前调整为具有特定入射角度的入射光，而在图2b中公开了以二次元件(菲涅耳透镜，Fresnel lens)44为例的态样，来自发光二极管22的指向性光线(虚线所示)在进入至导光基板12之前调整为准直的入射光，并于导光基板以沟槽斜面方式将光导入导光基板，此斜面也可位于导光基板边缘，最后，在图2c则公开了以为光学微结构46为例的态样，来自发光二极管22的指向性光线(虚线所示)在进入至导光基板12之前调整为准直的入射光，值得注意的是，上述的光学结构42、44、46的型态与结构，及最终指向性光线(虚线所示)进入至导光基板12的入射角度，并无特定的限制，也就是说，在采用光栅42为例的态样中，指向性光线(虚线所示)亦可能是以准直的角度入射至导光基板12内，最重要的是，来自发光二极管22的指向性光线(虚线所示)可通过光学结构42、44、46以在进入至导光基板12之前，依照设计与需求，从而调整成可匹配的入射角度。上述虽以独立结构体的态样来表示光学结构42、44、46，但实际的设计上，光学结构42、44、46也可以整合在导光基板12。
请接续参照图3所示，其为本发明提供的另一种屏内光学指纹辨识的发光二极管面板的结构截面示意图，此架构下须利用折射率的不同来控制光线进入导光基板内传递，折射率1与导光基板相同或接近，折射率2则比导光基板小。在本实施态样中的屏内光学指纹辨识的发光二极管面板1e，光感测元件16为独立的元件并设置在导光基板12的下方。
请接续再参考图4，本实施态样中的屏内光学指纹辨识的发光二极管面板1f公开了在导光基板12与发光二极管基板14之间更设置有一偏光基板26及一保护玻璃基板28，不过偏光基板26及保护玻璃基板28可选择性地设置，换言之，偏光基板26与保护玻璃基板28可同时设置或择一设置，或偏光基板26与保护玻璃基板28更可整合为单一结构。同时，偏光基板26亦可与导光基板12整合为单一结构，或偏光基板26、保护玻璃基板28与导光基板12更可整合为单一结构。根据上述可知，导光基板12除了提供用以进行指纹辨识的指向性光线(虚线所示)进行全反射之外，亦可同时具有偏光与保护的功能。
综上所述，根据本发明所提供的屏内光学指纹辨识的发光二极管面板是将侦测指纹的光感测元件整合在发光二极管面板内，且通过指向性光线在导光基板内的全反射，以感应按压在指纹接收区域的指纹，并通过光感测元件将光学信号转换为电气信号，以辨别指纹的特征，尤其是可利用光电二极管所构成的光感测元件以整合于发光二极管基板的遮光层区域上，因此不会降低面板的显示效果与质量。也因为指向性光线在进入至光感测元件之前可通过特定的光学微结构以调整光路径，同时更可通过设置在导光基板与光感测元件之间的信号放大元件(图未显示)，以保持光学信号的强度、确保指纹辨识的准确度。
而在实际的使用上，本发明提供的屏内光学指纹辨识的发光二极管面板可应用在行动装置、屏幕、电视等各种具有屏幕的装置，由于本发明的发光二极管面板具有相当大的指纹接收区域，对于用户而言，无须太过刻意即可轻易地进行指纹的辨识，无论是唤醒装置或进行身份辨识，均会因为使用的便利性提升而更增进用户使用指纹保护的功能，与现有的将指纹辨识设置在装置的侧表面或后表面的情况相比，本发明提供的屏内光学指纹辨识的发光二极管面板能够让指纹保护的机制更发挥其功能。
以上所述仅为本发明的较佳实施例而已，并非用来限定本发明实施的范围。故即凡依本发明权利要求所述的特征及精神所为的均等变化或修饰，均应包括于本发明的保护范围内。

Claims (20)

  1. 一种屏内光学指纹辨识的发光二极管面板，具有一主显示区域与一次显示区域，该屏内光学指纹辨识的发光二极管面板供一手指进行指纹辨识，其特征在于，包含：
    一发光二极管基板，具有多个发光二极管，且至少一该发光二极管提供一指向性光线；
    一导光基板，设置于该发光二极管基板上方，该导光基板具有至少一指纹接收区域、一信号导入区域与一信号导出区域，该指纹接收区域供该手指进行有效的按压，来自该发光二极管的该指向性光线自该信号导入区域进入至该导光基板并于其中进行全反射，且在该手指按压于该指纹接收区域时产生一光学信号，并自该信号导出区域离开该导光基板；以及
    一光感测元件，设置该发光二极管基板与该导光基板之间并位于离开该导光基板的该指向性光线的光路径上，该光感测元件接收离开该导光基板的该光学信号后，将该光学信号转换为一电气信号以辨识该手指的一指纹特征。
  2. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该发光二极管与该导光基板之间设置有至少一光学结构，该发光二极管提供的该指向性光线经过该光学结构后准直地或非准直地进入至该导光基板的该信号导入区域。
  3. 如权利要求2所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光学微结构为光学元件、二次元件、光学微结构及其组合。
  4. 如权利要求2所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光学微结构为独立结构体。
  5. 如权利要求2所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光学微结构整合于该导光基板。
  6. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该发光二极管基板为主动式有机发光二极管基板、被动式有机发光二极管基板、毫米发光二极管基板或微发光二极管基板。
  7. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，用以提供该指向性光线的该发光二极管为主动式有机发光二极管、被动式有机发光二极管、毫米发光二极管或微发光二极管。
  8. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，用以提供该指向性光线的该发光二极管设置于较接近于或位于该次显示区域。
  9. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该指纹接收区域为该导光基板的全部或局部区域。
  10. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该信号导入区域及该信号导出区域为镜面、棱镜薄膜、光栅或光纤的形式。
  11. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光感测元件为独立元件。
  12. 如权利要求11所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光感测元件设置在该导光基板的下方。
  13. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光感测元件整合于该发光二极管基板。
  14. 如权利要求13所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光感测元件为一光电二极管，其设置在相邻的两个发光二极管之间。
  15. 如权利要求14所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光电二极管对应设置在该发光二极管基板的一遮光区域。
  16. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该导光基板与该发光二极管基板之间更至少设置有一偏光基板或一保护玻璃基板。
  17. 如权利要求16所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该导光基板更与该偏光基板及该保护玻璃基板的至少其一整合为单一结构。
  18. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该导光基板及该光感测元件之间更设置一信号放大元件，以放大自该导光基板离开的该光学信号。
  19. 如权利要求1所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光学信号及该电气信号更通过一光学处理器以进行运算并辨识该手指的该指纹特征。
  20. 如权利要求19所述的屏内光学指纹辨识的发光二极管面板，其特征在于，该光学处理器更整合于该屏内光学指纹辨识的发光二极管面板的一显示处理器或该光学处理器更整合于一触控处理器。
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