# US 12,010,894 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 12,010,894 B2 - Document ID: US12010894B2 - Status: Granted - Kind: B2 - Application number: 16/979,686 - Filed: 2020-07-09 - Published: 2022-09-22 - Granted: 2024-06-11 - Earliest claimed: 2020-06-16 - Assignees: Wuhan China Star Optoelectronics Technology Co., Ltd. - Applicants: Wuhan China Star Optoelectronics Technology Co., Ltd. - Inventors: Tengteng Shi; Zhuo Zhang; Guowei Zha - Web page: https://patentgrep.com/patent/US12010894B2 ## CPC - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G02F 1/13312: {Circuits comprising photodetectors for purposes other than feedback} - G02F 1/13338: {Input devices, e.g. touch panels} - G02F 1/133512: {Light shielding layers, e.g. black matrix (G02F1/136209 takes precedence)} - G02F 1/133514: {Colour filters} - G02F 1/133562: {on the viewer side} - G09G 3/20: for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix {no fixed position being assigned to or needed to be assigned to the individual characters or partial characters} - H10K 59/38: comprising colour filters or colour changing media [CCM] - H10K 59/60: OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes - H10K 59/65: OLEDs integrated with inorganic image sensors - G09G 2354/00: Aspects of interface with display user - G09G 2360/144: the light being ambient light - H10K 59/8792: {comprising light absorbing layers, e.g. black layers} - 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 - G09G: ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION (arrangements for transferring data between digital computers and displays G06F3/14; static indicating arrangements comprising an association of a number of separate sources or light control cells G09F9/00; static indicating arrangements comprising integral associations of a number of light sources H01J, H01K, H10H, H05B33/12; scanning, transmission or reproduction of documents or the like, e.g. facsimile transmission, details thereof H04N1/00) - H10K: ORGANIC ELECTRIC SOLID-STATE DEVICES ## Abstract The present application provides a display panel and a display device. The display panel includes pixel units spaced apart from each other and at least one photosensor. From a top view, each photosensor is arranged at one side of the corresponding pixel unit, and the photosensors are configured to convert received light energy into electrical energy, so that the display panel has long-lasting power. ## Claims ### Claim 1 A display panel, comprising: a plurality of pixel units spaced apart from each other, each of the pixel units comprising a plurality of sub-pixels spaced apart from each other; and a plurality of photosensors, wherein from a top view, each of the photosensors is arranged at one side of the corresponding pixel unit, and the photosensors are configured to convert received light energy from an external environment and the pixel units into electrical energy; wherein each of the photosensors comprises a first state and a second state; in the first state, each of the photosensors is configured to convert the received light energy from an external environment and the pixel units into the electrical energy; in the second state, each of the photosensors is configured to receive reflected light of a fingerprint to generate an electrical signal; and the display panel further comprises a signal reading circuit, and the signal reading circuit is configured to identify the fingerprint according to the electrical signals of the photosensors; wherein the display panel further comprises an electrical energy collection circuit electrically connected to at least one of the photosensors for storing the electrical energy, and the electrical energy collection circuit comprises: a charging chip electrically connected to the photosensor; and an energy storage device, wherein the photosensor charges the energy storage device through the charging chip. ### Claim 2 (depends on 1) The display panel according to claim 1, wherein the display panel further comprises an array substrate, each of the pixel units comprises a plurality of light-emitting elements arranged on the array substrate, and from a top view, each of the photosensors is arranged between two adjacent light-emitting elements. ### Claim 3 (depends on 2) The display panel according to claim 2, wherein the light-emitting element comprises at least one of an organic light-emitting diode, a mini light-emitting diode, and a micro light-emitting diode. ### Claim 4 (depends on 1) The display panel according to claim 1, wherein the display panel further comprises a plurality of color filters spaced apart from each other, and from a top view, the photosensors are arranged between the color filters. ### Claim 5 (depends on 4) The display panel according to claim 4, wherein the display panel further comprises a black matrix; from a top view, the black matrix is arranged between the color filters; and the photosensors face toward the black matrix. ### Claim 6 (depends on 5) The display panel according to claim 5, wherein the black matrix is disposed over the color filters, or the black matrix is arranged in gaps between the color filters, or the black matrix is arranged below the color filters. ### Claim 7 (depends on 5) The display panel according to claim 5, wherein the photosensors are arranged under the black matrix, and a plurality of via holes are defined in the black matrix to expose the photosensors. ### Claim 8 (depends on 5) The display panel according to claim 5, wherein the display panel further comprises an array substrate, and the photosensors are arranged in areas of the array substrate corresponding to the black matrix. ### Claim 9 (depends on 4) The display panel according to claim 4, wherein the pixel units are liquid crystal display units, the display panel further comprises a color filter substrate, the color filters spaced apart from each other are disposed on the color filter substrate, and each of the pixel units comprises a corresponding one of the color filters. ### Claim 10 (depends on 4) The display panel according to claim 4, wherein the display panel further comprises an array substrate, each of the pixel units comprises a plurality of light-emitting elements arranged on the array substrate, and the color filters are disposed corresponding to the light-emitting elements. ### Claim 11 (depends on 1) The display panel according to claim 1, wherein the photosensor comprises an element for producing a photoelectric effect or a photovoltaic effect. ### Claim 12 (depends on 11) The display panel according to claim 11, wherein the photosensor comprises at least one of a photodiode, a phototransistor, and a photocell. ### Claim 13 (depends on 1) The display panel according to claim 1, wherein the electrical energy collection circuit further comprises a boost circuit arranged between the photosensors and the charging chip. ### Claim 14 (depends on 13) The display panel according to claim 13, wherein the boost circuit comprises at least one capacitor and an inductor, the photosensors are connected in parallel with the at least one capacitor, one end of the inductor is connected to the at least one capacitor, and the other end of the inductor is electrically connected to the charging chip. ### Claim 15 (depends on 1) The display panel according to claim 1, wherein the signal reading circuit comprises: a plurality of reading circuits configured to read the electrical signals; a reading chip electrically connected to the reading circuits, wherein the reading chips is configured to identify the fingerprint according to a difference between the electrical signals. ### Claim 16 (depends on 15) The display panel according to claim 15, wherein each of the reading circuits comprises: a storage capacitor, wherein the storage capacitor is connected in parallel with the photosensor, and a first terminal of the storage capacitor is configured to receive a bias signal; and a transistor, wherein a gate of the transistor is connected to a scan signal line, a first terminal of the transistor is connected to a reading signal line, and a second terminal of the transistor is connected to a second terminal of the storage capacitor. ### Claim 17 A display device, comprising a display panel, wherein the display panel comprises: a plurality of pixel units spaced apart from each other, each of the pixel units comprising a plurality of sub-pixels spaced apart from each other; and a plurality of photosensors, wherein from a top view, each of the photosensors is arranged at one side of the corresponding pixel unit, and the photosensors are configured to convert received light energy from an external environment and the pixel units into electrical energy; wherein each of the photosensors comprises a first state and a second state; in the first state, each of the photosensors is configured to convert the received light energy from an external environment and the pixel units into the electrical energy; in the second state, each of the photosensors is configured to receive reflected light of a fingerprint to generate an electrical signal; and the display panel further comprises a signal reading circuit, and the signal reading circuit is configured to identify the fingerprint according to the electrical signals of the photosensors, wherein the display panel further comprises an electrical energy collection circuit electrically connected to at least one of the photosensors for storing the electrical energy, and the electrical energy collection circuit comprises: a charging chip electrically connected to the photosensor; and an energy storage device, wherein the photosensor charges the energy storage device through the charging chip.