WO2019080591A1 - Organic electroluminescent display panel, display module and electronic device - Google Patents
Organic electroluminescent display panel, display module and electronic deviceInfo
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- WO2019080591A1 WO2019080591A1 PCT/CN2018/099377 CN2018099377W WO2019080591A1 WO 2019080591 A1 WO2019080591 A1 WO 2019080591A1 CN 2018099377 W CN2018099377 W CN 2018099377W WO 2019080591 A1 WO2019080591 A1 WO 2019080591A1
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- organic electroluminescent
- display panel
- fingerprint recognition
- fingerprint
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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
- H10K59/65—OLEDs integrated with inorganic image sensors
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- G—PHYSICS
- G06—COMPUTING OR CALCULATING; 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
- H10K59/80—Constructional details
- H10K59/805—Electrodes
- H10K59/8051—Anodes
- H10K59/80518—Reflective anodes, e.g. ITO combined with thick metallic layers
Definitions
- the present application relates to the field of display technologies, and in particular, to an organic electroluminescence display panel, a display module, and an electronic device.
- the screen ratio is a parameter used to indicate the relative ratio of the screen and the front panel area of the mobile phone. It can improve the aesthetic appearance of the mobile phone and the user's operating experience to a certain extent.
- the current common solution is to shorten or cancel the area on the front panel of the mobile phone at the top and bottom of the screen, so that the area of the front panel can be reduced under the same screen area, thereby Increases the footprint of the screen on the front panel.
- a mobile phone with fingerprint recognition function when shortening or canceling the area on the front panel at the bottom of the screen, it is impossible to make a hole on the front panel to install the fingerprint sensor.
- the usual solution is to set the fingerprint sensor on the mobile phone. On the rear case, in recent years, there has been a design in which the fingerprint sensor is mounted on the back side of the screen. Such a fingerprint sensor can perform fingerprint recognition through the screen, and the user can use the fingerprint recognition function by touching an area corresponding to the fingerprint sensor on the screen.
- the optical fingerprint sensor is a fingerprint sensor commonly used on the back side of the screen.
- the working principle is shown in FIG. 1.
- FIG. 1 is a schematic diagram of the working principle of the existing optical fingerprint sensor, as shown in FIG.
- the back side is provided with an optical fingerprint sensor 20, and when the user's finger 30 is placed on the screen 10 opposite to the area above the optical fingerprint sensor 20, the light 01 emitted by the screen 10 is reflected by the finger 30 and reflected back to the screen 10, and The imaging is recognized by the optical fingerprint sensor 20 through the screen 10, and different fingerprint imaging can be formed according to the difference in the fingerprint of the human hand, thereby implementing the optical fingerprint recognition function.
- the optical fingerprint sensor needs to work with a self-illuminating screen, so the display panel in the screen should be an Organic Light-Emitting Diodes (OLED) display panel.
- OLED Organic Light-Emitting Diodes
- the area corresponding to the fingerprint sensor in the display panel should have a high light transmittance.
- the display panel 11 of the screen 10 is an Active-Matrix Organic Light Emitting Diode (AMOLED) display panel, which includes an OLED layer in addition to the OLED layer 112.
- AMOLED Active-Matrix Organic Light Emitting Diode
- the driving array layer 111 of the pixel switch in 112 has a source 1113, a drain 1112 and a gate 1111.
- the OLED layer 12 has an anode 1123, an organic light-emitting layer 1121 and a cathode 1122, wherein the source 1113 and the drain
- the pole 1112, the gate 1111 and the anode 1123 are all made of a metal material, and the light transmittance thereof is poor, which causes light loss of the reflected light.
- the light loss of the reflected light passing through the anode 1123 of the OLED layer is experimentally tested. About 44%, the amount of light loss of the reflected light transmitted through the source 1113, the drain 1112 or the gate 1111 of the driving array layer 111 is about 80%, and the optical loss caused by the organic electroluminescent display panel causes the optical fingerprint.
- the image quality of the sensor is reduced, which affects the normal use of the fingerprint recognition function of the mobile phone.
- the present application provides an organic electroluminescence display panel, a display module, and an electronic device, which are used to solve the problem that the optical loss of the organic electroluminescent display panel in the prior art is high, and the imaging quality of the optical fingerprint sensor is reduced. problem.
- the present application provides an organic electroluminescent display panel, wherein an effective display area of the organic electroluminescent display panel includes at least one fingerprint identification area for using an optical fingerprint sensor The received light passes through, and the light transmittance of the at least one fingerprint recognition area is greater than the light transmittance of other areas in the effective display area.
- At least one fingerprint identification area is included in the effective display area, and each fingerprint identification area can be set corresponding to one or more optical fingerprint sensors in a specific implementation,
- the light transmittance of the fingerprint recognition area is greater than other areas in the effective display area, thereby reducing light loss caused by light passing through the fingerprint recognition area, thereby reducing the image quality degradation of the optical fingerprint sensor due to light loss. problem.
- the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition region is greater than the reflection in the organic electroluminescent layer corresponding to other regions in the effective display region. The transmittance of the electrode.
- the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area is greater than the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to other regions in the effective display area, the transmittance can be improved. Light transmittance of the fingerprint recognition area.
- the light transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition area is greater than or equal to 90%.
- the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area is greater than or equal to 90%, the light can be ensured to cause less light loss after passing through the organic electroluminescent layer, and further Guarantee the image quality of the optical fingerprint sensor.
- the sheet resistance of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition area is less than 100 ⁇ /sq.
- the source and drain electrodes and the gate electrode in the thin film transistor layer corresponding to the fingerprint recognition area can be ensured to have a desired light transmittance and a sheet resistance.
- the occlusion of the light passing through the fingerprint recognition area by the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area can be reduced, thereby improving the light transmittance of the fingerprint recognition area.
- the pixel density in the at least one fingerprint recognition area is less than the pixel density in other areas within the effective display area.
- 6b is a schematic cross-sectional structural view of a pixel in a fingerprint recognition area of the organic electroluminescence display panel of FIG. 5;
- each pixel 200 includes 3-4 sub-pixels, and the pixel 200 may be composed of three sub-pixels displaying three colors of red, green, and blue, or four sub-displays of four colors of red, green, blue, and yellow.
- the pixel composition may also be composed of four sub-pixels displaying four colors of red, green, blue and white, which is not specifically limited in this application; see FIG. 4 again.
- 4 is a schematic cross-sectional view of a pixel.
- the organic electroluminescent display panel provided by the embodiment of the present application is an active-matrix organic light emitting diode (AMOLED) display.
- AMOLED active-matrix organic light emitting diode
- the fingerprint identification area 111 needs to be used together with the optical fingerprint sensor, and one fingerprint identification area 111 can correspondingly set one or more optical fingerprint sensors, each of which The optical fingerprint recognition sensor is disposed on the back side of the light-emitting side of the organic electroluminescence display panel.
- the optical fingerprint recognition sensor is disposed on the back side of the light-emitting side of the organic electroluminescence display panel.
- the light emitted by the pixels in the fingerprint recognition area 111 is reflected by the user's finger back into the display panel, and passes through the fingerprint recognition.
- the area 111 is irradiated onto the optical fingerprint sensor.
- FIG. 5 is a partially enlarged schematic diagram of an effective display area and a fingerprint identification area 111 of another organic electroluminescent display panel according to an embodiment of the present application.
- the fingerprint identification area 111 is shown in FIG.
- the area of the pixels 200 within is smaller than the area of the pixels 200 in other areas within the effective display area. Then, when the light passes through the fingerprint recognition area 111, a part of the light can pass through the gap between the adjacent pixels 200. Since the part of the light does not pass through the pixel 200, the organic electroluminescent layer 210 of the pixel 200 is not received.
- the blocking of the thin film transistor layer 220 has a small light loss, which can reduce the light loss of all the light passing through the fingerprint recognition area 111, thereby improving the light transmittance of the fingerprint recognition area 111.
- the area of the electrode in the organic light-emitting layer 210 corresponding to each pixel 200 may be reduced, and the thin film transistor layer 220 corresponding to each pixel 200 may be reduced.
- the area of the electrode is achieved. Referring to FIG. 6a and FIG. 6b, FIG. 6a is a schematic cross-sectional view of a pixel 200 in other areas in the effective display area, and FIG.
- FIG. 6b is a cross-sectional structural view of the pixel 200 in the fingerprint identification area 111.
- the area of the reflective electrode in the organic electroluminescent layer 210 corresponding to the fingerprint recognition area 111 is smaller than the area of the reflective electrode in the organic electroluminescent layer 210 corresponding to other areas in the effective display area, so that the fingerprint identification area 111 is inside.
- the area of the pixel 200 is reduced, and the blocking of the light by the reflective electrode is reduced.
- the fingerprint recognition area 111 corresponds to the thin film transistor layer 220.
- the area of the source and drain electrodes and the gate is smaller than the area of the source and drain electrodes and the gate in the thin film transistor layer 220 corresponding to other regions in the effective display region, and can also reduce the area of the pixel 200 and reduce the source leakage.
- the pole and the gate block the light.
- FIG. 7 is a partially enlarged schematic diagram of an effective display area and a fingerprint identification area of another organic electroluminescent display panel according to an embodiment of the present disclosure.
- the pixel density is less than the pixel density in other areas within the effective display area.
- the gap size between adjacent pixels in the fingerprint recognition area 111 is increased, and when the light passes through the fingerprint recognition area 111, A part of the light can pass through the gap between adjacent pixels. Since the light does not pass through the pixel, it is not blocked by the organic electroluminescent layer and the thin film transistor layer of the pixel, and the light loss is small, which can be reduced.
- the above three implementation manners provided by the embodiments of the present application can make the light transmittance of the fingerprint recognition area larger than the light transmittance of other areas in the effective display area, thereby reducing the light loss caused by the light passing through the fingerprint recognition area. It also improves the problem of improving the image quality of the optical fingerprint sensor due to light loss.
- the organic electroluminescent display panel may adopt any one of the above three implementation manners to improve the transmittance of the fingerprint recognition area, and may also use any two of the above three implementation manners, for example,
- the pixel density can be reduced while reducing the pixel area in the fingerprint recognition area, or the pixel area in the fingerprint recognition area can be reduced while improving the transmittance of the reflective electrode, the source/drain electrode and the gate in the fingerprint recognition area.
- the above three implementations can also be used simultaneously.
- the organic electroluminescent display panel provided by the embodiment of the present application may be a flexible display panel or a non-flexible display panel, and thus the base substrate of the organic electroluminescent display panel is a flexible substrate or a non-flexible substrate.
- the fingerprint identification area is at least one. In other embodiments, the fingerprint identification area may also be two or more.
- the embodiment of the present application further provides a display module, including the organic electroluminescent display panel provided by the above embodiments.
- the display module further includes a structure such as a protection glass, a driving circuit, and the like.
- the display module can also reduce the light loss caused by light passing through the fingerprint recognition area of the display panel, thereby improving the problem of improving the image quality of the optical fingerprint sensor due to light loss.
- the fingerprint identification area and the non-fingerprint area PPI are the same, and the non-fingerprint area is an area other than the fingerprint identification area, that is, the effective display area except the fingerprint identification area.
- the light transmittance of the fingerprint recognition area is greater than the light transmittance of the non-fingerprint area.
- the electrode of the fingerprint recognition area may be a high permeability low resistance electrode material, such as ITO (Indium Tin Oxide) and PEDOT: PSS (conductive polymer). or,
- the fingerprint identification area and the non-fingerprint area PPI are the same, and the pixel electrode size of the fingerprint identification area is smaller than the pixel electrode size of the non-fingerprint area.
- the fingerprint identification area and the non-fingerprint area PPI are the same, and the channel length of the TFT of the fingerprint recognition area is smaller than the channel length of the TFT of the non-fingerprint identification area. or,
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Abstract
Description
本申请涉及显示技术领域，尤其涉及一种有机电致发光显示面板、显示模组及电子设备。The present application relates to the field of display technologies, and in particular, to an organic electroluminescence display panel, a display module, and an electronic device.
在目前的消费电子产品市场中，手机产品的外观设计已朝向高屏占比化方向发展，屏占比是用于表示屏幕和手机前面板面积的相对比值的参数，通过增加手机的屏占比，可在一定程度上提升手机的外观美感和用户的操作体验。In the current consumer electronics market, the design of mobile phone products has been moving toward the trend of high-screen ratio. The screen ratio is a parameter used to indicate the relative ratio of the screen and the front panel area of the mobile phone. It can improve the aesthetic appearance of the mobile phone and the user's operating experience to a certain extent.
为使手机获得较高的屏占比，目前常用的解决方法为缩短或取消手机前面板上位于屏幕顶端和底端的区域，可在屏幕面积不变的情况下使前面板的面积减小，从而可提高屏幕在前面板上的占用面积比例。对于具有指纹识别功能的手机而言，在缩短或取消前面板上位于屏幕底端的区域时，则无法在前面板上进行开孔以安装指纹传感器，通常的解决方式为将指纹传感器设置于手机的后壳上，而近年来出现了将指纹传感器安装在屏幕背侧的设计，此类指纹传感器可透过屏幕进行指纹识别，用户通过触摸屏幕上与指纹传感器对应的区域即可使用指纹识别功能。In order to obtain a higher screen ratio of the mobile phone, the current common solution is to shorten or cancel the area on the front panel of the mobile phone at the top and bottom of the screen, so that the area of the front panel can be reduced under the same screen area, thereby Increases the footprint of the screen on the front panel. For a mobile phone with fingerprint recognition function, when shortening or canceling the area on the front panel at the bottom of the screen, it is impossible to make a hole on the front panel to install the fingerprint sensor. The usual solution is to set the fingerprint sensor on the mobile phone. On the rear case, in recent years, there has been a design in which the fingerprint sensor is mounted on the back side of the screen. Such a fingerprint sensor can perform fingerprint recognition through the screen, and the user can use the fingerprint recognition function by touching an area corresponding to the fingerprint sensor on the screen.
光学式指纹传感器是目前常用于屏幕背侧的一种指纹传感器，其工作原理参见图1所示，图1是现有的光学式指纹传感器的工作原理示意图，如图1所示，屏幕10的背侧设有光学式指纹传感器20，当用户的手指30放置在屏幕10上与光学式指纹传感器20上方正对的区域时，屏幕10发出的光线01遇到手指30后反射回屏幕10，并穿过屏幕10被光学式指纹传感器20识别成像，且根据人手指纹的差异可形成不同的指纹成像，从而实现光学式指纹识别功能。基于此工作原理，光学式指纹传感器需要搭配可自发光的屏幕进行工作，因此屏幕中的显示面板应为有机电致发光(Organic Light-Emitting Diodes；OLED)显示面板。另外，为保证指纹的成像质量，显示面板中与指纹传感器对应的区域应该具有较高的透光率。参见图1所示，屏幕10的显示面板11为有源矩阵型有机电致发光(Active-Matrix Organic Light Emitting Diode；AMOLED)显示面板，除了包括OLED层112之外，还包括用于控制OLED层112中的像素开关的驱动阵列层111，驱动阵列层111具有源极1113、漏极1112和栅极1111，OLED层12具有阳极1123、有机发光层1121和阴极1122，其中，源极1113、漏极1112、栅极1111和阳极1123均由金属材料制成，其透光率较差，会造成反射光线的光损失，经实验测试得知，反射光线透过OLED层的阳极1123的光损失量约为44％，反射光线透过驱动阵列层111的源极1113、漏极1112或栅极1111的光损失量约为80％，由有机电致发光显示面板造成的光损失会导致光学式指纹传感器的成像质量降低，从而影响手机的指纹识别功能的正常使用。The optical fingerprint sensor is a fingerprint sensor commonly used on the back side of the screen. The working principle is shown in FIG. 1. FIG. 1 is a schematic diagram of the working principle of the existing optical fingerprint sensor, as shown in FIG. The back side is provided with an
发明内容Summary of the invention
本申请提供一种有机电致发光显示面板、显示模组及电子设备，用以解决现有技术中的有机电致发光显示面板的光损失较高，进而导致光学式指纹传感器的成像质量降低的问题。The present application provides an organic electroluminescence display panel, a display module, and an electronic device, which are used to solve the problem that the optical loss of the organic electroluminescent display panel in the prior art is high, and the imaging quality of the optical fingerprint sensor is reduced. problem.
第一方面，本申请提供了一种有机电致发光显示面板，所述有机电致发光显示面板的有效显示区域内包括至少一个指纹识别区，所述指纹识别区域用于使光学式指纹传感器所接收的光线通过，所述至少一个指纹识别区的透光率大于所述有效显示区域内的其他区域的透光率。In a first aspect, the present application provides an organic electroluminescent display panel, wherein an effective display area of the organic electroluminescent display panel includes at least one fingerprint identification area for using an optical fingerprint sensor The received light passes through, and the light transmittance of the at least one fingerprint recognition area is greater than the light transmittance of other areas in the effective display area.
本申请第一方面提供的有机电致发光显示面板中，其有效显示区域内包括至少一个指纹识别区，每个指纹识别区在具体实施中可与一个或多个光学式指纹传感器对应设置，由于指纹识别区的透光率大于有效显示区域内的其他区域，因此可减少光线在穿过指纹识别区时造成的光损失，进而可减少由于光损失造成的提高光学式指纹传感器的成像质量降低的问题。In the organic electroluminescent display panel provided by the first aspect of the present application, at least one fingerprint identification area is included in the effective display area, and each fingerprint identification area can be set corresponding to one or more optical fingerprint sensors in a specific implementation, The light transmittance of the fingerprint recognition area is greater than other areas in the effective display area, thereby reducing light loss caused by light passing through the fingerprint recognition area, thereby reducing the image quality degradation of the optical fingerprint sensor due to light loss. problem.
在一种可能的设计中，所述至少一个指纹识别区对应的有机电致发光层中的反射电极的透光率大于所述有效显示区域内的其他区域对应的有机电致发光层中的反射电极的透光率。In a possible design, the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition region is greater than the reflection in the organic electroluminescent layer corresponding to other regions in the effective display region. The transmittance of the electrode.
通过上述设计，当指纹识别区对应的有机电致发光层中的反射电极的透光率大于有效显示区域内的其他区域对应的有机电致发光层中的反射电极的透光率时，可提高指纹识别区的透光率。Through the above design, when the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area is greater than the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to other regions in the effective display area, the transmittance can be improved. Light transmittance of the fingerprint recognition area.
在一种可能的设计中，所述至少一个指纹识别区对应的有机电致发光层中的反射电极的透光率大于或等于90％。In one possible design, the light transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition area is greater than or equal to 90%.
通过上述设计，在指纹识别区对应的有机电致发光层中的反射电极的透光率大于或等于90％时，可保证光线在穿过有机电致发光层后造成较小的光损失，进而保证光学式指纹传感器的成像质量。Through the above design, when the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area is greater than or equal to 90%, the light can be ensured to cause less light loss after passing through the organic electroluminescent layer, and further Guarantee the image quality of the optical fingerprint sensor.
在一种可能的设计中，所述至少一个指纹识别区对应的有机电致发光层中的反射电极的方块电阻小于100Ω/sq。In a possible design, the sheet resistance of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition area is less than 100 Ω/sq.
通过上述设计，在指纹识别区对应的有机电致发光层中的反射电极的方块电阻小于100Ω/sq时，可降低有机电致发光层的工作电压。With the above design, when the sheet resistance of the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition region is less than 100 Ω/sq, the operating voltage of the organic electroluminescent layer can be lowered.
在一种可能的设计中，所述至少一个指纹识别区对应的有机电致发光层中的反射电极由氧化铟锡材料或导电聚合物材料制成。In one possible design, the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition region is made of an indium tin oxide material or a conductive polymer material.
通过上述设计，可保证指纹识别区对应的有机电致发光层中的反射电极具有所需的透光率和方块电阻。Through the above design, it is ensured that the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area has a desired light transmittance and a sheet resistance.
在一种可能的设计中，所述至少一个指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的透光率大于所述有效显示区域内的其他区域对应的薄膜晶体管层中的源漏电极和栅极的透光率。In a possible design, the light transmittance of the source/drain electrodes and the gates in the thin film transistor layer corresponding to the at least one fingerprint recognition region is greater than the source in the thin film transistor layer corresponding to other regions in the effective display region. The transmittance of the drain electrode and the gate.
通过上述设计，可指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的透光率大于有效显示区域内的其他区域对应的薄膜晶体管层中的源漏电极和栅极的透光率时，可提高指纹识别区的透光率。Through the above design, the light transmittance of the source/drain electrodes and the gates in the thin film transistor layer corresponding to the fingerprintable region is greater than the light transmittance of the source and drain electrodes and the gate in the thin film transistor layer corresponding to other regions in the effective display region. When, the light transmittance of the fingerprint recognition area can be improved.
在一种可能的设计中，所述至少一个指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的透光率大于或等于90％。In a possible design, the light source and drain electrodes and the gate of the thin film transistor layer corresponding to the at least one fingerprint recognition area have a light transmittance greater than or equal to 90%.
通过上述设计，在指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的透光率大于或等于90％时，可保证光线在穿过薄膜晶体管层后造成较小的光损失，进而保证光学式指纹传感器的成像质量。Through the above design, when the light transmittance of the source/drain electrodes and the gate in the thin film transistor layer corresponding to the fingerprint recognition area is greater than or equal to 90%, light loss is ensured after passing through the thin film transistor layer, and further, Guarantee the image quality of the optical fingerprint sensor.
在一种可能的设计中，所述至少一个指纹识别区对应的薄膜晶体管层中的源漏电极和 栅极的方块电阻小于100Ω/sq。In a possible design, the source-drain electrodes and the gates in the thin film transistor layer corresponding to the at least one fingerprint recognition region have a sheet resistance of less than 100 Ω/sq.
通过上述设计，在指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的方块电阻小于100Ω/sq时，可降低薄膜晶体管层的工作电压。With the above design, when the sheet resistance of the source/drain electrodes and the gate in the thin film transistor layer corresponding to the fingerprint recognition region is less than 100 Ω/sq, the operating voltage of the thin film transistor layer can be lowered.
在一种可能的设计中，所述至少一个指纹识别区对应的薄膜晶体管层中的源漏电极和栅极由氧化铟锡材料或导电聚合物材料制成。In a possible design, the source-drain electrodes and the gates in the thin film transistor layer corresponding to the at least one fingerprint recognition region are made of an indium tin oxide material or a conductive polymer material.
通过上述设计，可保证指纹识别区对应的薄膜晶体管层中的源漏电极和栅极具有所需的透光率和方块电阻。Through the above design, the source and drain electrodes and the gate electrode in the thin film transistor layer corresponding to the fingerprint recognition area can be ensured to have a desired light transmittance and a sheet resistance.
在一种可能的设计中，所述至少一个指纹识别区内的像素的面积小于所述有效显示区域内的其他区域内的像素的面积。In one possible design, the area of the pixels in the at least one fingerprint recognition area is smaller than the area of pixels in other areas within the effective display area.
通过上述设计，可减小指纹识别区内的像素对穿过指纹识别区的光线的遮挡，进而提高指纹识别区的透光率。Through the above design, the occlusion of the light passing through the fingerprint recognition area by the pixels in the fingerprint recognition area can be reduced, thereby improving the light transmittance of the fingerprint recognition area.
在一种可能的设计中，所述至少一个指纹识别区对应的有机电致发光层中的反射电极的面积小于所述有效显示区域内的其他区域对应的有机电致发光层中的反射电极的面积。In a possible design, the area of the reflective electrode in the organic electroluminescent layer corresponding to the at least one fingerprint recognition area is smaller than the reflective electrode in the organic electroluminescent layer corresponding to the other areas in the effective display area. area.
通过上述设计，可减小指纹识别区对应的有机电致发光层中的反射电极对穿过指纹识别区的光线的遮挡，进而提高指纹识别区的透光率。Through the above design, the occlusion of the light passing through the fingerprint recognition area by the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition area can be reduced, thereby improving the light transmittance of the fingerprint recognition area.
在一种可能的设计中，所述至少一个指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的面积小于所述有效显示区域内的其他区域对应的薄膜晶体管层中的源漏电极和栅极的面积。In a possible design, an area of the source/drain electrodes and the gates in the thin film transistor layer corresponding to the at least one fingerprint identification area is smaller than a source/drain electrode in the thin film transistor layer corresponding to other areas in the effective display area. And the area of the gate.
通过上述设计，可减小指纹识别区对应的薄膜晶体管层中的源漏电极和栅极对穿过指纹识别区的光线的遮挡，进而提高指纹识别区的透光率。Through the above design, the source-drain electrodes and the gates in the thin film transistor layer corresponding to the fingerprint recognition area can be shielded from the light passing through the fingerprint recognition area, thereby improving the light transmittance of the fingerprint recognition area.
在一种可能的设计中，所述至少一个指纹识别区内的像素密度小于所述有效显示区域内的其他区域内的像素密度。In one possible design, the pixel density in the at least one fingerprint recognition area is less than the pixel density in other areas within the effective display area.
通过上述设计，可减小指纹识别区内的像素对穿过指纹识别区的光线的遮挡，进而提高指纹识别区的透光率。Through the above design, the occlusion of the light passing through the fingerprint recognition area by the pixels in the fingerprint recognition area can be reduced, thereby improving the light transmittance of the fingerprint recognition area.
在一种可能的设计中，所述有机电致发光显示面板的衬底基板为柔性基板或非柔性基板。In one possible design, the base substrate of the organic electroluminescent display panel is a flexible substrate or a non-flexible substrate.
第二方面，本申请提供了一种显示模组，包括如上述第一方面及其所有可能的设计提供的有机电致发光显示面板。In a second aspect, the present application provides a display module comprising an organic electroluminescent display panel as provided by the first aspect above and all possible designs thereof.
本申请第二方面提供的显示模组中，其显示面板中的有效显示区域内包括至少一个指纹识别区，每个指纹识别区在具体实施中可与一个或多个光学式指纹传感器对应设置，由于指纹识别区的透光率大于有效显示区域内的其他区域，因此可减少光线在穿过指纹识别区时造成的光损失，进而可减少由于光损失造成的提高光学式指纹传感器的成像质量降低的问题。In the display module provided by the second aspect of the present application, at least one fingerprint identification area is included in the effective display area of the display panel, and each fingerprint identification area may be corresponding to one or more optical fingerprint sensors in a specific implementation. Since the light transmittance of the fingerprint recognition area is larger than other areas in the effective display area, the light loss caused by the light passing through the fingerprint recognition area can be reduced, thereby reducing the image quality degradation of the optical fingerprint sensor due to light loss. The problem.
第三方面，本申请提供了一种电子设备，包括至少一个光学式指纹传感器和如上述第二方面提供的显示模组，所述光学式指纹传感器设置于与所述显示模组的出光侧相背离的一侧，且所述至少一个一个光学式指纹传感器与所述显示模组中的至少一个指纹指纹识别区一一对应。In a third aspect, the present application provides an electronic device, including at least one optical fingerprint sensor and a display module according to the second aspect, wherein the optical fingerprint sensor is disposed on a light emitting side of the display module. a side facing away, and the at least one optical fingerprint sensor is in one-to-one correspondence with at least one fingerprint fingerprint identification area of the display module.
本申请第三方面提供的电子设备中，其显示模组的显示面板的有效显示区域内包括至少一个指纹识别区，每个指纹识别区在具体实施中可与一个或多个光学式指纹传感器对应设置，由于指纹识别区的透光率大于有效显示区域内的其他区域，因此可减少光线在穿过 指纹识别区时造成的光损失，进而可减少由于光损失造成的提高光学式指纹传感器的成像质量降低的问题，从而提高电子设备的指纹识别功能的正常使用率。In the electronic device provided by the third aspect of the present application, the effective display area of the display panel of the display module includes at least one fingerprint identification area, and each fingerprint identification area can be corresponding to one or more optical fingerprint sensors in a specific implementation. The light loss of the fingerprint recognition area is greater than that of other areas in the effective display area, thereby reducing light loss caused by light passing through the fingerprint recognition area, thereby reducing imaging of the optical fingerprint sensor due to light loss. The problem of reduced quality, thereby improving the normal usage rate of the fingerprint recognition function of the electronic device.
根据本申请第一方面、第一方面所有可能的设计、本申请第二方面和本申请第三方面，指纹识别区和非指纹区PPI(Pixel Per Inch，单位英寸的像素量)相同，非指纹区为指纹识别区以外的的区域，即有效显示区域内除了指纹识别区以外的其他区域，指纹识别区的透光率大于非指纹区的透光率。例如，指纹识别区的电极可以选用高透低阻电极材料，如选用ITO(Indium Tin Oxide，氧化铟锡)和PEDOT：PSS(导电聚合物)。或，According to the first aspect of the present application, all possible designs of the first aspect, the second aspect of the present application, and the third aspect of the present application, the fingerprint identification area and the non-fingerprint area PPI (Pixel Per Inch) are the same, non-fingerprint The area is an area other than the fingerprint identification area, that is, the area other than the fingerprint identification area in the effective display area, and the light transmittance of the fingerprint recognition area is greater than the light transmittance of the non-fingerprint area. For example, the electrode of the fingerprint recognition area may be a high permeability low resistance electrode material, such as ITO (Indium Tin Oxide) and PEDOT: PSS (conductive polymer). or,
其中，指纹识别区和非指纹区PPI相同，指纹识别区的像素电极尺寸小于非指纹区的像素电极尺寸。或者，指纹识别区和非指纹区PPI相同，指纹识别区的TFT的沟道长度小于非指纹识别区的TFT的沟道长度。或，The fingerprint identification area and the non-fingerprint area PPI are the same, and the pixel electrode size of the fingerprint identification area is smaller than the pixel electrode size of the non-fingerprint area. Alternatively, the fingerprint identification area and the non-fingerprint area PPI are the same, and the channel length of the TFT of the fingerprint recognition area is smaller than the channel length of the TFT of the non-fingerprint identification area. or,
其中，指纹识别区的PPI小于非指纹区的PPI，指纹识别区和非指纹识别区的像素尺寸相同。The PPI of the fingerprint identification area is smaller than the PPI of the non-fingerprint area, and the pixel size of the fingerprint identification area and the non-fingerprint identification area are the same.
通过上述三种方案可以使得指纹识别区的透光率大于有效显示区域内的其他区域，进而可以减少光线在穿过指纹识别区时造成的光损失。Through the above three schemes, the light transmittance of the fingerprint recognition area can be made larger than other areas in the effective display area, thereby reducing the light loss caused by the light passing through the fingerprint recognition area.
图1为现有技术中的一种光学式指纹传感器的工作原理示意图；1 is a schematic diagram showing the working principle of an optical fingerprint sensor in the prior art;
图2为本申请实施例提供的一种有机电致发光显示面板的结构示意图；2 is a schematic structural diagram of an organic electroluminescence display panel according to an embodiment of the present application;
图3为本申请实施例提供的一种有机电致发光显示面板的有效显示区和指纹识别区的局部放大示意图；3 is a partially enlarged schematic view showing an effective display area and a fingerprint identification area of an organic electroluminescence display panel according to an embodiment of the present disclosure;
图4为本申请实施例提供的一种有机电致发光显示面板的一个像素的剖面结构示意图；4 is a schematic cross-sectional structural view of a pixel of an organic electroluminescence display panel according to an embodiment of the present application;
图5为本申请实施例提供的另一种有机电致发光显示面板的有效显示区和指纹识别区的局部放大示意图；5 is a partially enlarged schematic view showing an effective display area and a fingerprint identification area of another organic electroluminescent display panel according to an embodiment of the present application;
图6a为图5中的有机电致发光显示面板的有效显示区域内的其他区域中的像素的剖面结构示意图；6a is a schematic cross-sectional view showing a pixel in another area in an effective display area of the organic electroluminescent display panel of FIG. 5;
图6b为图5中的有机电致发光显示面板的指纹识别区中的像素的剖面结构示意图；6b is a schematic cross-sectional structural view of a pixel in a fingerprint recognition area of the organic electroluminescence display panel of FIG. 5;
图7为本申请实施例提供的另一种有机电致发光显示面板的有效显示区和指纹识别区的局部放大示意图。FIG. 7 is a partially enlarged schematic view showing an effective display area and a fingerprint identification area of another organic electroluminescent display panel according to an embodiment of the present application.
为了使本申请的目的、技术方案和优点更加清楚，下面将结合附图对本申请作进一步地详细描述。In order to make the objects, technical solutions and advantages of the present application more clear, the present application will be further described in detail below with reference to the accompanying drawings.
本申请中所涉及的多个，是指两个或两个以上。The plurality referred to in the present application means two or more.
另外，需要理解的是，在本申请的描述中，“第一”、“第二”等词汇，仅用于区分描述的目的，而不能理解为指示或暗示相对重要性，也不能理解为指示或暗示顺序。In addition, it should be understood that in the description of the present application, the terms "first", "second" and the like are used only to distinguish the purpose of description, and are not to be understood as indicating or implying relative importance, nor as an indication. Or suggest the order.
本申请实施例提供了一种有机电致发光显示面板，用以解决现有技术中的有机电致发光显示面板的光损失较高，进而导致光学式指纹传感器的成像质量降低的问题。The embodiment of the present application provides an organic electroluminescence display panel for solving the problem that the optical loss of the organic electroluminescence display panel in the prior art is high, which leads to a decrease in imaging quality of the optical fingerprint sensor.
参见图2所示，图2为本申请实施例提供的一种有机电致发光显示面板的结构示意图，该有机电致发光显示面板100具有有效显示区域110，具体地，有效显示区域为显示面板中可进行显示的区域，如图2所示，有效显示区域110内包括一个指纹识别区111，具体实施中，指纹识别区域111与一个光学式指纹传感器配合使用，并用于使光学式指纹传感器所接收的光线通过，具体地，参见图3所示，图3是有效显示区域和指纹识别区的局部放大示意图，有效显示区域110包括多个像素200，指纹识别区111中同样包括多个像素200，具体地，每个像素200中包括3-4个子像素，像素200可由显示红、绿、蓝三种颜色的三个子像素组成，也可由显示红、绿、蓝、黄四种颜色的四个子像素组成，还可由显示红、绿、蓝、白四种颜色的四个子像素组成，本申请对此不作具体限制；再参见图4所示，图4是一个像素的剖面结构示意图，需要说明的是，本申请实施例提供的有机电致发光显示面板为有源矩阵型有机电致发光(Active-Matrix Organic Light Emitting Diode；AMOLED)显示面板，即显示面板中除了包括用于发光的OLED层之外，还包括薄膜晶体管层，薄膜晶体管层中包括多个阵列分布的薄膜晶体管，每个薄膜晶体管与一个像素中的一个子像素对应设置，并用于控制对应的子像素的开关，图4中仅示出一个子像素的结构，参见图4所示，本申请实施例提供的显示面板中的每个像素200包括有机电致发光层210和薄膜晶体管层220，其中，有机电致发光层210包括阴极211、有机层212和阳极213，薄膜晶体管层220中的一个薄膜晶体管包括源极222、漏极221和栅极223。2 is a schematic structural diagram of an organic electroluminescent display panel provided by an embodiment of the present application. The organic
本申请实施例提供的有机电致发光显示面板在实际使用过程中，指纹识别区111需与光学式指纹传感器配合使用，一个指纹识别区111可对应设置一个或多个光学式指纹传感器，每个光学式指纹识别传感器设置于有机电致发光显示面板的出光侧的背面，在指纹识别过程中，指纹识别区111内的像素发出的光线被用户的手指反射回显示面板内，并穿过指纹识别区111照射到光学式指纹传感器上，为减小光线在穿过指纹识别区111时造成的光损失，需要使指纹识别区111的透光率大于有效显示区域内的其他区域的透光率。本申请实施例采用如下方式来提高指纹识别区111的透光率。In the actual use process of the organic electroluminescent display panel provided by the embodiment of the present application, the
在一种实现方式中，指纹识别区对应的有机电致发光层中的反射电极的透光率大于有效显示区域内的其他区域对应的有机电致发光层中的反射电极的透光率。参见图4所示，在有机电致发光层210中，阳极213作为反射电极，因此当指纹识别区内的反射电极的透光率大于有效显示区域内的其他区域中的有机电致发光层中的反射电极的透光率时，可减小光线穿过指纹识别区的反射电极后造成的光损失，一种具体实施方式中，指纹识别区对应的有机电致发光层中的反射电极的透光率应大于或等于90％，以降低反射电极造成的光损失。在保证反射电极的透光率的同时还需保证发射电极本身的电气性能，为减小有机电致发光层的工作电压，提高有机层的工作寿命，一种具体实施方式中，指纹识别区对应的有机电致发光层中的反射电极的方块电阻小于100Ω/sq。在具体实施中，指纹识别区对应的有机电致发光层中的反射电极可由氧化铟锡材料或导电聚合物材料制成，以使反射电极具有所需的透光率和方块电阻。In one implementation, the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to the fingerprint recognition region is greater than the transmittance of the reflective electrode in the organic electroluminescent layer corresponding to other regions in the effective display region. Referring to FIG. 4, in the
为进一步提高指纹识别区的透光率，还可提高指纹识别区对应的薄膜晶体管层的透光率，参见图4所示，指纹识别区对应的薄膜晶体管层220中的源漏电极和栅极的透光率大于有效显示区域内的其他区域对应的薄膜晶体管层中的源漏电极和栅极的透光率，以减小 光线穿过指纹识别区对应的薄膜晶体管层中的源漏电极和栅极后造成的光损失。一种具体实施方式中，指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的透光率大于或等于90％，以降低源漏电极和栅极造成的光损失。同时，为降低源漏电极和栅极的工作电压，降低薄膜晶体管的功耗，一种具体实施方式中，指纹识别区对应的薄膜晶体管层中的源漏电极和栅极的方块电阻小于100Ω/sq。在具体实施中，指纹识别区对应的薄膜晶体管层中的源漏电极和栅极可由氧化铟锡材料或导电聚合物材料制成，以使源漏电极和栅极具有所需的透光率和方块电阻。In order to further improve the light transmittance of the fingerprint recognition area, the light transmittance of the thin film transistor layer corresponding to the fingerprint recognition area may also be improved. Referring to FIG. 4, the source and drain electrodes and the gate in the thin
在另一种实现方式中，参见图5所示，图5是本申请实施例提供的另一种有机电致发光显示面板的有效显示区域和指纹识别区111的局部放大示意图，指纹识别区111内的像素200的面积小于有效显示区域内的其他区域内的像素200的面积。则光线在穿过指纹识别区111时，一部分光线可由相邻的像素200之间的间隙中穿过，由于此部分光线未穿过像素200，因此不会受到像素200的有机电致发光层210和薄膜晶体管层220的阻挡，其光损失较小，可降低穿过指纹识别区111的全部光线的光损失，进而使指纹识别区111的透光率提高。具体地，为减小指纹识别区111内的像素200的面积，可通过减小每个像素200对应的有机发光层210中的电极的面积、以及减小每个像素200对应的薄膜晶体管层220中的电极的面积来实现。具体参见图6a和图6b所示，图6a是有效显示区域内的其他区域中的像素200的剖面结构示意图，图6b是指纹识别区111中的像素200的剖面结构示意图，一种具体实施方式中，指纹识别区111对应的有机电致发光层210中的反射电极的面积小于有效显示区域内的其他区域对应的有机电致发光层210中的反射电极的面积，以使指纹识别区111内的像素200面积减小，并减少反射电极对光线的阻挡，同理，继续参见图6a和图6b所示，在像素200的薄膜晶体管层220中，指纹识别区111对应的薄膜晶体管层220中的源漏电极和栅极的面积小于有效显示区域内的其他区域对应的薄膜晶体管层220中的源漏电极和栅极的面积，同样可起到减小像素200面积的作用，并减少源漏电极和栅极对光线的阻挡。In another implementation manner, referring to FIG. 5, FIG. 5 is a partially enlarged schematic diagram of an effective display area and a
在另一种实现方式中，参见图7所示，图7是本申请实施例提供的另一种有机电致发光显示面板的有效显示区域和指纹识别区的局部放大示意图，指纹识别区111内的像素密度小于有效显示区域内的其他区域内的像素密度。在指纹识别区111内的像素密度小于有效显示区域内的其他区域内的像素密度时，增加了指纹识别区111内相邻像素之间的间隙大小，则光线在穿过指纹识别区111时，一部分光线可由相邻的像素之间的间隙中穿过，由于此部分光线未穿过像素，因此不会受到像素的有机电致发光层和薄膜晶体管层的阻挡，其光损失较小，可降低穿过指纹识别区111的全部光线的光损失，进而使指纹识别区111的透光率提高。具体实施中，可通过减少指纹识别区111内的像素的行列数的方式来降低指纹识别区111的像素密度。In another implementation manner, referring to FIG. 7 , FIG. 7 is a partially enlarged schematic diagram of an effective display area and a fingerprint identification area of another organic electroluminescent display panel according to an embodiment of the present disclosure. The pixel density is less than the pixel density in other areas within the effective display area. When the pixel density in the
本申请实施例提供的上述三种实现方式均可使指纹识别区的透光率大于有效显示区域内的其他区域的透光率，进而可减少光线在穿过指纹识别区时造成的光损失，并改善由于光损失造成的提高光学式指纹传感器的成像质量降低的问题。在具体实施中，有机电致发光显示面板可采用上述三种实现方式中的任一种来提高其指纹识别区的透光率，也可同时使用上述三种实现方式中的任意两种，例如可在减小指纹识别区内的像素面积的同时降低像素密度，或在提高指纹识别区内的反射电极、源漏电极和栅极的透光率的同时减小指纹识别区内的像素面积，或在提高指纹识别区内的反射电极、源漏电极和栅极的透光率的 同时降低像素密度，另外上述三种实现方式还可同时使用。需要说明的是，本申请实施例提供的有机电致发光显示面板可为柔性显示面板或非柔性显示面板，因此有机电致发光显示面板的衬底基板为柔性基板或非柔性基板。另外，在本申请实施例提供的有机电致发光显示面板的有效显示区域内，指纹识别区至少为一个，在其他实施方式中，指纹识别区还可为两个或多个。The above three implementation manners provided by the embodiments of the present application can make the light transmittance of the fingerprint recognition area larger than the light transmittance of other areas in the effective display area, thereby reducing the light loss caused by the light passing through the fingerprint recognition area. It also improves the problem of improving the image quality of the optical fingerprint sensor due to light loss. In a specific implementation, the organic electroluminescent display panel may adopt any one of the above three implementation manners to improve the transmittance of the fingerprint recognition area, and may also use any two of the above three implementation manners, for example, The pixel density can be reduced while reducing the pixel area in the fingerprint recognition area, or the pixel area in the fingerprint recognition area can be reduced while improving the transmittance of the reflective electrode, the source/drain electrode and the gate in the fingerprint recognition area. Or to improve the light transmittance of the reflective electrode, the source/drain electrode and the gate in the fingerprint recognition area while reducing the pixel density, and the above three implementations can also be used simultaneously. It should be noted that the organic electroluminescent display panel provided by the embodiment of the present application may be a flexible display panel or a non-flexible display panel, and thus the base substrate of the organic electroluminescent display panel is a flexible substrate or a non-flexible substrate. In addition, in the effective display area of the organic electroluminescent display panel provided by the embodiment of the present application, the fingerprint identification area is at least one. In other embodiments, the fingerprint identification area may also be two or more.
基于同一发明构思，本申请实施例还提供了一种显示模组，包括如上述实施例提供的有机电致发光显示面板。具体实施中，该显示模组还包括保护玻璃、驱动电路等结构。该显示模组同样可减少光线在穿过其显示面板的指纹识别区时造成的光损失，进而可改善由于光损失造成的提高光学式指纹传感器的成像质量降低的问题。其原理和具体实现方式参见上述实施例，不再赘述。Based on the same inventive concept, the embodiment of the present application further provides a display module, including the organic electroluminescent display panel provided by the above embodiments. In a specific implementation, the display module further includes a structure such as a protection glass, a driving circuit, and the like. The display module can also reduce the light loss caused by light passing through the fingerprint recognition area of the display panel, thereby improving the problem of improving the image quality of the optical fingerprint sensor due to light loss. For the principle and specific implementation manners, refer to the foregoing embodiments, and details are not described herein.
基于同一发明构思，本申请实施例还提供了一种电子设备，包括一个光学式指纹传感器和如上述实施例提供的显示模组，光学式指纹传感器设置于与显示模组的出光侧相背离的一侧，且光学式指纹传感器与显示模组中的指纹指纹识别区对应设置。Based on the same inventive concept, an embodiment of the present application further provides an electronic device including an optical fingerprint sensor and a display module according to the above embodiment. The optical fingerprint sensor is disposed away from the light exiting side of the display module. One side, and the optical fingerprint sensor is correspondingly set with the fingerprint fingerprint identification area in the display module.
在显示模组中的显示面板具有两个或多个指纹识别区时，则光学式指纹传感器的数量也需对应增加，且光学式指纹传感器的数量与指纹识别区的数量一一对应。具体实施中，本申请实施例提供的电子设备可为手机、平板电脑、笔记本电脑、电脑等设备。When the display panel in the display module has two or more fingerprint recognition areas, the number of optical fingerprint sensors also needs to be correspondingly increased, and the number of optical fingerprint sensors is in one-to-one correspondence with the number of fingerprint identification areas. In an implementation, the electronic device provided by the embodiment of the present application may be a mobile phone, a tablet computer, a notebook computer, a computer, or the like.
本申请实施例提供的电子设备同样可减少光线在穿过指纹识别区时造成的光损失，进而可减少由于光损失造成的提高光学式指纹传感器的成像质量降低的问题，从而提高电子设备的指纹识别功能的正常使用率。其原理和具体实现方式参见上述实施例，不再赘述。The electronic device provided by the embodiment of the present application can also reduce the light loss caused by the light passing through the fingerprint recognition area, thereby reducing the problem of improving the imaging quality of the optical fingerprint sensor due to the light loss, thereby improving the fingerprint of the electronic device. Identify the normal usage of the feature. For the principle and specific implementation manners, refer to the foregoing embodiments, and details are not described herein.
基于上述技术方案，指纹识别区和非指纹区PPI(Pixel Per Inch，单位英寸的像素量)相同，非指纹区为指纹识别区以外的的区域，即有效显示区域内除了指纹识别区以外的其他区域，指纹识别区的透光率大于非指纹区的透光率。例如，指纹识别区的电极可以选用高透低阻电极材料，如选用ITO(Indium Tin Oxide，氧化铟锡)和PEDOT：PSS(导电聚合物)。或，Based on the above technical solution, the fingerprint identification area and the non-fingerprint area PPI (Pixel Per Inch, the pixel amount per inch) are the same, and the non-fingerprint area is an area other than the fingerprint identification area, that is, the effective display area except the fingerprint identification area. In the area, the light transmittance of the fingerprint recognition area is greater than the light transmittance of the non-fingerprint area. For example, the electrode of the fingerprint recognition area may be a high permeability low resistance electrode material, such as ITO (Indium Tin Oxide) and PEDOT: PSS (conductive polymer). or,
其中，指纹识别区和非指纹区PPI相同，指纹识别区的像素电极尺寸小于非指纹区的像素电极尺寸。或者，指纹识别区和非指纹区PPI相同，指纹识别区的TFT的沟道长度小于非指纹识别区的TFT的沟道长度。或，The fingerprint identification area and the non-fingerprint area PPI are the same, and the pixel electrode size of the fingerprint identification area is smaller than the pixel electrode size of the non-fingerprint area. Alternatively, the fingerprint identification area and the non-fingerprint area PPI are the same, and the channel length of the TFT of the fingerprint recognition area is smaller than the channel length of the TFT of the non-fingerprint identification area. or,
其中，指纹识别区的PPI小于非指纹区的PPI，指纹识别区和非指纹识别区的像素尺寸相同。The PPI of the fingerprint identification area is smaller than the PPI of the non-fingerprint area, and the pixel size of the fingerprint identification area and the non-fingerprint identification area are the same.
显然，本领域的技术人员可以对本申请进行各种改动和变型而不脱离本申请的精神和范围。这样，倘若本申请的这些修改和变型属于本申请权利要求及其等同技术的范围之内，则本申请也意图包含这些改动和变型在内。It will be apparent to those skilled in the art that various modifications and changes can be made in the present application without departing from the spirit and scope of the application. Thus, it is intended that the present invention cover the modifications and variations of the present invention.
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