# US 12,010,771 B2 · Detection device and detection method for light emitting element > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 12,010,771 B2 - Document ID: US12010771B2 - Status: Granted - Kind: B2 - Application number: 17/964,046 - Filed: 2022-10-12 - Published: 2023-06-29 - Granted: 2024-06-11 - Earliest claimed: 2021-12-29 - Assignees: Acer Incorporated - Applicants: Acer Incorporated - Inventors: Jui-Chieh Hsiang; Chih-Chiang Chen - Web page: https://patentgrep.com/patent/US12010771B2 ## CPC - 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} - H05B 45/12: using optical feedback - G09G 3/006: {Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309)} - H10N 30/20: with electrical input and mechanical output, e.g. functioning as actuators or vibrators - G09G 2330/10: Dealing with defective pixels - H05B 47/105: in response to determined parameters - H10N 30/30: with mechanical input and electrical output, e.g. functioning as generators or sensors - H10N 39/00: Integrated devices, or assemblies of multiple devices, comprising at least one piezoelectric, electrostrictive or magnetostrictive element covered by groups H10N30/00 – H10N35/00 - 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) - H05B: ELECTRIC HEATING; ELECTRIC LIGHT SOURCES NOT OTHERWISE PROVIDED FOR; CIRCUIT ARRANGEMENTS FOR ELECTRIC LIGHT SOURCES, IN GENERAL - H10N: ELECTRIC SOLID-STATE DEVICES NOT OTHERWISE PROVIDED FOR ## Abstract A detection device and a detection method for a light emitting element are provided. The detection device includes a piezoelectricity sensor and a light sensing circuit. The piezoelectricity sensor includes a first piezoelectricity element, wherein the first piezoelectricity element is used to contact a first electrode of the light emitting element to cause a first deformation of the first piezoelectricity element. The first piezoelectricity element generates a first voltage based on the first deformation to power the first electrode. A second electrode of the light emitting element is coupled to a reference voltage. The light sensing circuit is used to sense whether the light emitting element powered by the first voltage emits light. ## Claims ### Claim 1 A detection device, used to detect a light emitting element, the detection device comprising: a piezoelectricity sensor, comprising a first piezoelectricity element, wherein the first piezoelectricity element is used to contact a first electrode of the light emitting element to cause a first deformation of the first piezoelectricity element, and the first piezoelectricity element generates a first voltage based on the first deformation to power the first electrode, wherein a second electrode of the light emitting element is coupled to a reference voltage; and a light sensing circuit, used to sense whether the light emitting element powered by the first voltage emits light, wherein the light sensing circuit comprises a pixel circuit, and the pixel circuit comprises: a sensing switch, having a first end coupled to a data line, wherein a control end of the sensing switch is coupled to a scan line; and a capacitor, having a first end coupled to a second end of the sensing switch, wherein a second end of the capacitor receives a common voltage, and during a period when the first voltage powers the light emitting element, an amount of light of the light emitting element changes a leakage rate of the sensing switch to the capacitor. ### Claim 2 (depends on 1) The detection device according to claim 1, wherein the light emitting element comprises an organic light emitting diode, a micro light emitting diode, an electroluminescence element, a quantum dot light emitting diode, a quantum dot organic light emitting diode, a quantum dot electroluminescence element, or a laser diode. ### Claim 3 (depends on 1) The detection device according to claim 1, wherein the first piezoelectricity element comprises: a conductive material, having a first end portion for contacting the first electrode of the light emitting element; a piezoelectricity material, connected to a second end portion of the conductive material; a transparent holder, wherein the piezoelectricity material is disposed between the transparent holder and the conductive material, and the transparent holder comprises a stack structure of glass, plastic sheet, ultra-thin glass, and polyimide, a stack structure of ultra-thin glass and film, or a stack structure of ultra-thin glass, film, and ultra-thin glass; and a transparent conductive layer, disposed on a surface of the transparent holder, wherein the transparent conductive layer is disposed between the transparent holder and the piezoelectricity material. ### Claim 4 (depends on 3) The detection device according to claim 3, wherein the first piezoelectricity element comprises: a holding structure, disposed on the transparent holder to hold the conductive material and the piezoelectricity material. ### Claim 5 (depends on 1) The detection device according to claim 1, wherein the light sensing circuit further comprises: a gate drive circuit, coupled to the scan line and used to transmit a scan signal to the scan line to turn on the sensing switch during a write period and a read period; a data drive circuit, coupled to the data line and used to transmit an initial voltage to the capacitor through the data line and the sensing switch during the write period; and a read circuit, coupled to the data line and used to read a leakage voltage of the capacitor through the data line and the sensing switch during the read period. ### Claim 6 (depends on 1) The detection device according to claim 1, wherein the light sensing circuit further comprises: a gate drive circuit, coupled to the scan line and used to transmit a scan signal to the scan line to turn on the sensing switch during a write period and a read period; a switch circuit, having a common end coupled to the data line, wherein the switch circuit electrically connects the common end to a first selection end of the switch circuit during the write period, and the switch circuit electrically connects the common end to a second selection end of the switch circuit during the read period; a data drive circuit, coupled to the first selection end of the switch circuit and used to transmit an initial voltage to the capacitor through the switch circuit, the data line, and the sensing switch during the write period; and a read circuit, coupled to the second selection end of the switch circuit and used to read a leakage voltage of the capacitor through the switch circuit, the data line, and the sensing switch during the read period. ### Claim 7 (depends on 6) The detection device according to claim 6, wherein the read circuit judges whether the light emitting element emits light when the first voltage powers the first electrode according to a difference between the leakage voltage and the initial voltage of the capacitor. ### Claim 8 (depends on 1) The detection device according to claim 1, wherein the pixel circuit further comprises: a reset switch, wherein a first end of the reset switch is coupled to the first end of the capacitor, a second end of the reset switch receives the common voltage, and a control end of the reset switch is coupled to a reset line. ### Claim 9 (depends on 8) The detection device according to claim 8, wherein the light sensing circuit further comprises: a controller, coupled to the reset line and used to transmit a reset signal to the reset line to turn on the reset switch to reset a voltage of the first end of the capacitor to the common voltage during a reset period. ### Claim 10 (depends on 1) The detection device according to claim 1, wherein the light sensing circuit comprises an image capture device, a light detector, or an electrical detector. ### Claim 11 A detection device, used to detect a light emitting element, the detection device comprising: a piezoelectricity sensor, comprising a first piezoelectricity element, wherein the first piezoelectricity element is used to contact a first electrode of the light emitting element to cause a first deformation of the first piezoelectricity element, and the first piezoelectricity element generates a first voltage based on the first deformation to power the first electrode, wherein a second electrode of the light emitting element is coupled to a reference voltage; and a light sensing circuit, used to sense whether the light emitting element powered by the first voltage emits light, wherein the piezoelectricity sensor further comprises: a second piezoelectricity element, used to contact the second electrode of the light emitting element to cause a second deformation of the second piezoelectricity element, wherein the second piezoelectricity element generates a second voltage based on the second deformation to power the second electrode. ### Claim 12 A detection method for a light emitting element, comprising: overlaying a piezoelectricity sensor on the light emitting element, so that a first piezoelectricity element of the piezoelectricity sensor contacts a first electrode of the light emitting element to cause a first deformation of the first piezoelectricity element, wherein a second electrode of the light emitting element is coupled to a reference voltage; generating a first voltage based on the first deformation by the first piezoelectricity element to power the first electrode; and sensing whether the light emitting element powered by the first voltage emits light through a light sensing circuit; when overlaying the piezoelectricity sensor on the light emitting element, enabling a second piezoelectricity element of the piezoelectricity sensor to contact the second electrode of the light emitting element to cause a second deformation of the second piezoelectricity element; and generating a second voltage based on the second deformation by the second piezoelectricity element to power the second electrode. ### Claim 13 (depends on 12) The detection method according to claim 12, wherein the light sensing circuit comprises an image capture device, a light detector, or an electrical detector.