# US 11,908,228 B2 · Display panel and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,908,228 B2 - Document ID: US11908228B2 - Status: Granted - Kind: B2 - Application number: 17/047,680 - Filed: 2020-06-30 - Published: 2023-04-20 - Granted: 2024-02-20 - Earliest claimed: 2020-06-16 - Assignees: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Semiconductor Display Technology Co., Ltd. - Inventors: Bi Chen - Web page: https://patentgrep.com/patent/US11908228B2 ## CPC - G06F 3/0446: {using a grid-like structure of electrodes in at least two directions, e.g. using row and column electrodes} - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G02F 1/13338: {Input devices, e.g. touch panels} - G06F 3/0412: {Digitisers structurally integrated in a display} - G06F 3/0443: {using a single layer of sensing electrodes} - G06V 40/12: Fingerprints or palmprints - G06F 3/04164: {Connections between sensors and controllers, e.g. routing lines between electrodes and connection pads} - G06F 3/0448: {Details of the electrode shape, e.g. for enhancing the detection of touches, for generating specific electric field shapes, for enhancing display quality} - G06F 2203/04111: Cross over in capacitive digitiser, i.e. details of structures for connecting electrodes of the sensing pattern where the connections cross each other, e.g. bridge structures comprising an insulating layer, or vias through substrate - H10K 59/40: OLEDs integrated with touch screens - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING - 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 - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present disclosure discloses a display panel and a display device. The display panel includes a display substrate, the display substrate includes a plurality of pixel units; and a touch layer and a fingerprint recognition layer disposed on the display substrate; wherein, the touch layer includes at least one touch unit; the fingerprint recognition layer includes at least one primary fingerprint recognition unit, each of the primary fingerprint recognition units includes NSFPS sub-fingerprint recognition units corresponding to Npixel pixel units, where NSFPS, Npixel are positive integers. ## Claims ### Claim 1 A display panel, comprising: a display substrate, the display substrate including a plurality of pixel units; a touch layer and a fingerprint recognition layer disposed on the display substrate, wherein the touch layer includes one or more touch units, the fingerprint recognition layer includes one or more primary fingerprint recognition units, and each of the primary fingerprint recognition units includes NSFPS sub-fingerprint recognition units corresponding to Npixel ones of the pixel units, where NSFPS and Npixel are positive integers; a thin film encapsulation layer disposed on the display substrate; a first insulating layer disposed on the thin film encapsulation layer; a first metal layer disposed on the first insulating layer; a second insulating layer disposed on the first metal layer and provided with at least one via hole; a second metal layer disposed on the second insulating layer and connected with the first metal layer by the via hole; and a third insulating layer disposed on the second metal layer. ### Claim 2 (depends on 1) The display panel according to claim 1, wherein the touch layer and the fingerprint recognition layer are disposed in the same layer. ### Claim 3 (depends on 1) The display panel according to claim 1, wherein a distance between adjacent ones of the touch units is from 5 millimeters to 20 millimeters, and a distance between adjacent ones of the sub-fingerprint recognition units is from 50 micrometers to 150 micrometers. ### Claim 4 (depends on 1) The display panel according to claim 1, wherein a distance PUFPS between adjacent ones of the primary fingerprint identification units satisfies PUFPS=Npixel×Ppixel or PUFPS=NSFPS×PSFPS, and a difference between Npixel×Ppixel and NSFPS×PSFPS is less than 25 micrometers, where Ppixel is a distance between adjacent ones of the pixel units, and PSFPS is a distance between adjacent ones of the sub-fingerprint recognition units. ### Claim 5 (depends on 1) The display panel according to claim 1, wherein the first metal layer is touch sensing electrodes or touch driving electrodes in the touch layer, and is fingerprint recognition bridging metal traces in the fingerprint recognition layer; the second metal layer is fingerprint recognition sensing electrodes or fingerprint recognition driving electrodes in the fingerprint recognition layer, and is touch bridging metal traces or dummy electrodes in the touch layer; the fingerprint recognition bridging metal traces connect adjacent ones of the fingerprint recognition sensing electrodes or adjacent ones of the fingerprint recognition driving electrodes; the touch bridging metal traces connect adjacent ones of the touch sensing electrodes or adjacent ones of the touch driving electrodes, and the dummy electrodes cover the pixel units. ### Claim 6 (depends on 5) The display panel according to claim 5, wherein shapes of the fingerprint recognition bridging metal traces are isometric enlarged patterns of corresponding outline of the pixel units, or straight-line shape. ### Claim 7 (depends on 1) The display panel according to claim 1, wherein the first metal layer is a non-transparent material, including at least one of gold, silver, copper, lithium, sodium, potassium, magnesium, aluminum, or zinc, and the first metal layer is disposed between adjacent ones of the pixel units. ### Claim 8 (depends on 1) The display panel according to claim 1, wherein the second metal layer is a transparent conductive material, including a first indium tin oxide layer, a silver layer, and a second indium tin oxide layer which are stacked; the first indium tin oxide layer and the second indium tin oxide layer have a thickness of 5 nanometers to 20 nanometers, and the silver layer has a thickness of 5 nanometers to 30 nanometers. ### Claim 9 A display device, comprising a display panel, the display panel comprising: a display substrate, the display substrate including a plurality of pixel units; a touch layer and a fingerprint recognition layer disposed on the display substrate, wherein, the touch layer includes one or more touch units, the fingerprint recognition layer includes one or more primary fingerprint recognition units, and each of the primary fingerprint recognition units includes NSFPS sub-fingerprint recognition units corresponding to Npixel ones of the pixel units, wherein NSFPS and Npixel are positive integers; a thin film encapsulation layer disposed on the display substrate; a first insulating layer disposed on the thin film encapsulation layer; a first metal layer disposed on the first insulating layer; a second insulating layer disposed on the first metal layer and provided with at least one via hole; a second metal layer disposed on the second insulating layer and connected with the first metal layer by the via hole; and a third insulating layer disposed on the second metal layer. ### Claim 10 (depends on 9) The display device according to claim 9, wherein the touch layer and the fingerprint recognition layer are disposed in the same layer. ### Claim 11 (depends on 9) The display device according to claim 9, wherein a distance between adjacent ones of the touch units is from 5 millimeters to 20 millimeters, and a distance between adjacent ones of the sub-fingerprint recognition units is from 50 micrometers to 150 micrometers. ### Claim 12 (depends on 9) The display device according to claim 9, wherein a distance PUFPS between adjacent ones of the primary fingerprint identification units satisfies PUFPS=Npixel×Ppixel or PUFPS=NSFPS×PSFPS, and a difference between Npixel×Ppixel and NSFPS×PSFPS is less than 25 micrometers, where Ppixel is a distance between adjacent ones of the pixel units, and PSFPS is a distance between adjacent ones of the sub-fingerprint recognition units. ### Claim 13 (depends on 9) The display device according to claim 9, wherein the first metal layer is touch sensing electrodes or touch driving electrodes in the touch layer, and is fingerprint recognition bridging metal traces in the fingerprint recognition layer; the second metal layer is fingerprint recognition sensing electrodes or fingerprint recognition driving electrodes in the fingerprint recognition layer, and is touch bridging metal traces or dummy electrodes in the touch layer; the fingerprint recognition bridging metal traces connect adjacent ones of the fingerprint recognition sensing electrodes or adjacent ones of the fingerprint recognition driving electrodes; the touch bridging metal traces connect adjacent ones of the touch sensing electrodes or adjacent ones of the touch driving electrodes, and the dummy electrodes cover the pixel units. ### Claim 14 (depends on 13) The display device according to claim 13, wherein shapes of the fingerprint recognition bridging metal traces are isometric enlarged patterns of corresponding outline of the pixel units, or straight-line shape. ### Claim 15 (depends on 9) The display device according to claim 9, wherein the first metal layer is a non-transparent material, including at least one of gold, silver, copper, lithium, sodium, potassium, magnesium, aluminum, or zinc, and the first metal layer is disposed between adjacent ones of the pixel units. ### Claim 16 (depends on 9) The display device according to claim 9, wherein the second metal layer is a transparent conductive material, including a first indium tin oxide layer, a silver layer, and a second indium tin oxide layer which are stacked; the first indium tin oxide layer and the second indium tin oxide layer have a thickness of 5 nanometers to 20 nanometers, and the silver layer has a thickness of 5 nanometers to 30 nanometers. ### Claim 17 A display panel, comprising: a display substrate, the display substrate including a plurality of pixel units; and a touch layer and a fingerprint recognition layer disposed on the display substrate, wherein the touch layer includes one or more touch units, the fingerprint recognition layer includes one or more primary fingerprint recognition units, and each of the primary fingerprint recognition units includes NSFPS sub-fingerprint recognition units corresponding to Npixel ones of the pixel units, where NSFPS and Npixel are positive integers; and wherein a distance PUFPS between adjacent ones of the primary fingerprint identification units satisfies PUFPS=Npixel×Ppixel or PUFPS=NSFPS×PSFPS, and a difference between Npixel×Ppixel and NSFPS×PSFPS is less than 25 micrometers, where Ppixel is a distance between adjacent ones of the pixel units, and PSFPS is a distance between adjacent ones of the sub-fingerprint recognition units. ### Claim 18 (depends on 17) The display panel according to claim 17, wherein the touch layer and the fingerprint recognition layer are disposed in the same layer. ### Claim 19 (depends on 17) The display panel according to claim 17, herein a distance between adjacent ones of the touch units is from 5 millimeters to 20 millimeters, and a distance between adjacent ones of the sub-fingerprint recognition units is from 50 micrometers to 150 micrometers.