# US 10,504,922 B2 · Array substrate, display panel and display device capable of synchronizing image display and fingerprint identification > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,504,922 B2 - Document ID: US10504922B2 - Status: Granted - Kind: B2 - Application number: 15/562,874 - Filed: 2017-02-17 - Published: 2018-07-05 - Granted: 2019-12-10 - Earliest claimed: 2016-05-24 - Assignees: Boe Technology Group Co., Ltd.; Beijing Boe Optoelectronics Technology Co., Ltd. - Applicants: Boe Technology Group Co., Ltd.; Beijing Boe Optoelectronics Technology Co., Ltd. - Inventors: Yingming Liu; Xue Dong; Haisheng Wang; Xiaochuan Chen; Xiaoliang Ding; Shengji Yang; Weijie Zhao; Changfeng Li; Lei Wang; Pengpeng Wang; Wei Liu - Web page: https://patentgrep.com/patent/US10504922B2 ## CPC - H10D 86/40: characterised by multiple TFTs - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/136227: {Through-hole connection of the pixel electrode to the active element through an insulation layer} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - H10D 86/60: wherein the TFTs are in active matrices - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract This disclosure provides an array substrate, a display panel and a display device. The array substrate comprises a substrate, a transistor and a photosensitive element above the substrate. The transistor comprises a gate and is used for controlling display of pixels. The photosensitive element comprises a light-transmissive electrode and a photosensitive layer, the light-transmissive electrode being used for allowing sensitive light rays reflected by a surface of a fingerprint pressed thereon to pass through and impinge on the photosensitive layer, and the light-transmissive electrode being connected to the gate. By connecting the light-transmissive electrode to the gate, the array substrate achieves synchronization of image display and fingerprint identification without individually providing a scan function for fingerprint identification, which greatly facilitates the actual applications requiring synchronization of image display and fingerprint identification. ## Claims ### Claim 1 An array substrate comprising a substrate, a transistor and a photosensitive element above the substrate, the transistor comprising a gate and being used for controlling display of pixels, and the photosensitive element comprising a light-transmissive electrode and a photosensitive layer, wherein the light-transmissive electrode is used for allowing sensitive light rays reflected by a surface of a fingerprint pressed thereon to pass through and impinge on the photosensitive layer, and the light-transmissive electrode is connected to the gate. ### Claim 2 (depends on 1) The array substrate according to claim 1, wherein the photosensitive element further comprises a signal output electrode, which is used for outputting an electric signal based on the sensitive light rays impinging on the photosensitive layer so as to identify the fingerprint, wherein the photosensitive layer is located between the light-transmissive electrode and the signal output electrode. ### Claim 3 (depends on 2) The array substrate according to claim 2, wherein the photosensitive element is arranged in a direction of an orthogonal projection of the transistor onto the substrate, and the photosensitive element is located at a side of the transistor away from the substrate. ### Claim 4 (depends on 3) The array substrate according to claim 3, wherein the signal output electrode, the photosensitive layer and the light-transmissive electrode are sequentially far away from the transistor. ### Claim 5 (depends on 4) The array substrate according to claim 4, wherein the transistor further comprises a source and a drain, the source and the drain being in a same layer and spaced from each other, the photosensitive element overlaps a spacing region between the source and the drain, wherein the signal output electrode is made of a same material as the gate. ### Claim 6 (depends on 5) The array substrate according to claim 5, wherein the array substrate further comprises a transparent electrode above the source and the drain, the light-transmissive electrode and the transparent electrode being made of a same material and in a same layer, wherein a material for the photosensitive layer comprises at least one selected from the group consisting of lead sulfide, amorphous silicon and polysilicon material. ### Claim 7 (depends on 6) The array substrate according to claim 6, wherein the array substrate further comprises a pixel electrode connected with the drain, the transparent electrode being a common electrode, wherein a passivation layer is arranged between the pixel electrode and the transparent electrode. ### Claim 8 (depends on 1) The array substrate according to claim 1, wherein the gate completely occludes the photosensitive element in a direction of an orthogonal projection of the gate onto the substrate. ### Claim 9 (depends on 1) A display panel comprising the array substrate according to claim 1. ### Claim 10 (depends on 9) The display panel according to claim 9, further comprising a color film substrate and a backlight source, the color film substrate being aligned with the array substrate, the backlight source being arranged at a side of the array substrate away from the color film substrate and configured for providing backlight to the array substrate and the color film substrate which are aligned, wherein the backlight source comprises a sensitive light source for emitting the sensitive light rays, wherein the color film substrate comprises a black matrix, the black matrix occluding a region in which the transistor is located, and a region of the black matrix corresponding to the photosensitive element allowing transmission of the sensitive light rays. ### Claim 11 (depends on 10) The display panel according to claim 10, wherein the region of the black matrix corresponding to the photosensitive element is made of a material that only allows transmission of the sensitive light rays. ### Claim 12 (depends on 10) The display panel according to claim 10, wherein the region of the black matrix corresponding to the photosensitive element comprises a filter that only allows transmission of the sensitive light rays. ### Claim 13 (depends on 10) The display panel according to claim 10, wherein the backlight source further comprises a display light source for providing backlight for display. ### Claim 14 (depends on 13) The display panel according to claim 13, wherein the sensitive light source comprises an infrared light source. ### Claim 15 (depends on 9) A display device comprising a display panel according to claim 9. ### Claim 16 (depends on 9) The display panel according to claim 9, wherein the photosensitive element further comprises a signal output electrode, which is used for outputting an electric signal based on the sensitive light rays impinging on the photosensitive layer so as to identify the fingerprint, wherein the photosensitive layer is located between the light-transmissive electrode and the signal output electrode. ### Claim 17 (depends on 16) The display panel according to claim 16, wherein the photosensitive element is arranged in a direction of an orthogonal projection of the transistor onto the substrate, and the photosensitive element is located at a side of the transistor away from the substrate. ### Claim 18 (depends on 17) The display panel according to claim 17, wherein the signal output electrode, the photosensitive layer and the light-transmissive electrode are sequentially far away from the transistor. ### Claim 19 (depends on 18) The display panel according to claim 18, wherein the transistor further comprises a source and a drain, the source and the drain being in a same layer and spaced from each other, the photosensitive element overlaps a spacing region between the source and the drain, wherein the signal output electrode is made of a same material as the gate. ### Claim 20 (depends on 9) The display panel according to claim 9, wherein the gate completely occludes the photosensitive element in a direction of an orthogonal projection of the gate onto the substrate.