# US 12,016,236 B2 · Display module and electronic device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,016,236 B2 - Document ID: US12016236B2 - Status: Granted - Kind: B2 - Application number: 17/439,880 - Filed: 2020-09-23 - Published: 2022-11-03 - Granted: 2024-06-18 - Earliest claimed: 2019-10-04 - Assignees: Semiconductor Energy Laboratory Co., Ltd. - Applicants: Semiconductor Energy Laboratory Co., Ltd. - Inventors: Kei Takahashi; Hidetomo Kobayashi - Web page: https://patentgrep.com/patent/US12016236B2 ## CPC - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - H10K 59/60: OLEDs integrated with inorganic light-sensitive elements, e.g. with inorganic solar cells or inorganic photodiodes - G06F 1/1652: {the display being flexible, e.g. mimicking a sheet of paper, or rollable} - G06F 1/1684: {Constructional details or arrangements related to integrated I/O peripherals not covered by groups G06F1/1635 - G06F1/1675} - G06F 3/0418: {for error correction or compensation, e.g. based on parallax, calibration or alignment} - G06F 3/0421: {by interrupting or reflecting a light beam, e.g. optical touch-screen} - G09G 3/3291: in which the data driver supplies a variable data voltage for setting the current through, or the voltage across, the light-emitting elements - H10K 59/351: {comprising more than three subpixels, e.g. red-green-blue-white [RGBW]} - H10K 77/111: {Flexible substrates} - G06V 40/1318: {using electro-optical elements or layers, e.g. electroluminescent sensing} - G09G 2230/00: Details of flat display driving waveforms - G09G 2300/0452: Details of colour pixel setup, e.g. pixel composed of a red, a blue and two green components - G09G 2310/0289: Details of voltage level shifters arranged for use in a driving circuit - G09G 2310/0291: Details of output amplifiers or buffers arranged for use in a driving circuit - G09G 2330/06: Handling electromagnetic interferences [EMI], covering emitted as well as received electromagnetic radiation - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - G09G 2354/00: Aspects of interface with display user - G09G 2360/142: the light being detected by light detection means within each pixel - 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 - G06F: ELECTRIC DIGITAL DATA PROCESSING (computer systems based on specific computational models G06N) - G06V: IMAGE OR VIDEO RECOGNITION OR UNDERSTANDING ## Abstract Common noise is reduced from light-receiving data. A display module includes a display apparatus and a reading circuit. Each of a first pixel and a second pixel adjacent to each other in the display apparatus includes a light-receiving element and a light-emitting element. The reading circuit includes a differential input circuit. Common noise generated when display data is supplied to a light-emitting element, for example, may affect a first light-receiving signal output by the first pixel and a second light-receiving signal output by the second pixel. A first current is generated using the first light-receiving signal and a ramp signal, and a second current is generated using the second light-receiving signal and a first potential. The differential input circuit is controlled so that the first current and the second current have the same current value, whereby common noise can be removed from the first light-receiving signal. ## Claims ### Claim 1 A display module comprising a display apparatus and a reading circuit, wherein the display apparatus comprises a first pixel and a second pixel adjacent to each other, wherein each of the first pixel and the second pixel comprises a light-receiving element, wherein the reading circuit comprises a differential input circuit, wherein a ramp signal and a first potential are supplied to the reading circuit, wherein the differential input circuit is controlled so that a first current and a second current have the same current value, wherein the first current is generated using a first light-receiving signal and the ramp signal, and wherein the second current is generated using a second light-receiving signal and the first potential. ### Claim 2 (depends on 1) The display module according to claim 1, wherein the display apparatus comprises a transistor, and wherein the transistor comprises a metal oxide in a semiconductor layer. ### Claim 3 (depends on 2) The display module according to claim 2, wherein the transistor comprises a back gate. ### Claim 4 (depends on 1) The display module according to claim 1, wherein the display apparatus has flexibility. ### Claim 5 (depends on 1) An electronic device comprising the display module according to claim 1 and at least one of an antenna, a battery, a housing, a camera, a speaker, a microphone, and an operation button. ### Claim 6 A display module comprising a display apparatus and a reading circuit, wherein the display apparatus comprises a first pixel and a second pixel adjacent to each other, wherein the first pixel comprises a first subpixel and a second subpixel, wherein the second pixel comprises a third subpixel and a fourth subpixel, wherein each of the first subpixel and the third subpixel comprises a light-receiving element, wherein each of the second subpixel and the fourth subpixel comprises a light-emitting element, wherein the reading circuit comprises a differential input circuit, wherein a ramp signal and a first potential are supplied to the reading circuit, wherein the differential input circuit is controlled so that a first current and a second current have the same current value, wherein the first current is generated using a first light-receiving signal and the ramp signal, and wherein the second current is generated using a second light-receiving signal and the first potential. ### Claim 7 (depends on 6) The display module according to claim 6, wherein the light-emitting element comprises a first pixel electrode, a first active layer, and a common electrode, wherein the first active layer comprises a first organic compound, wherein the light-receiving element comprises a second pixel electrode, a second active layer, and the common electrode, and wherein the second active layer comprises a second organic compound. ### Claim 8 (depends on 6) The display module according to claim 6, wherein the display apparatus comprises a transistor, and wherein the transistor comprises a metal oxide in a semiconductor layer. ### Claim 9 (depends on 8) The display module according to claim 8, wherein the transistor comprises a back gate. ### Claim 10 (depends on 6) The display module according to claim 6, wherein the display apparatus has flexibility. ### Claim 11 (depends on 6) An electronic device comprising the display module according to claim 6 and at least one of an antenna, a battery, a housing, a camera, a speaker, a microphone, and an operation button.