# US 10,872,579 B2 · Method for reducing operating temperature of source driving circuit and display system > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,872,579 B2 - Document ID: US10872579B2 - Status: Granted - Kind: B2 - Application number: 16/402,212 - Filed: 2019-05-02 - Published: 2019-11-07 - Granted: 2020-12-22 - Earliest claimed: 2018-05-03 - Assignees: Novatek Microelectronics Corp. - Applicants: NOVATEK Microelectronics Corp. - Inventors: Sheng-Wen Lai; Te-Hsien Kuo; Han-Kun Wu; Chin-Hung Hsu - Web page: https://patentgrep.com/patent/US10872579B2 ## CPC - G09G 3/3685: {Details of drivers for data electrodes} - G02F 1/133382: {Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell} - G09G 3/3611: {Control of matrices with row and column drivers} - G09G 3/3614: {Control of polarity reversal in general} - G09G 3/3674: {Details of drivers for scan electrodes} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2320/041: Temperature compensation - G09G 2330/04: Display protection - G09G 2330/045: Protection against panel overheating - G09G 2330/08: Fault-tolerant or redundant circuits, or circuits in which repair of defects is prepared - G09G 2330/12: Test circuits or failure detection circuits included in a display system, as permanent part thereof - 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) - 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 ## Abstract A method for reducing operating temperature of a source driving circuit and a display system are provided. The method for reducing operating temperature of a source driving circuit includes enabling an over-temperature protection operation by the source driving circuit; and transmitting, by the source driving circuit, a first signal to a timing controller in response to detecting a temperature increasing to be higher than the first threshold temperature, wherein the timing controller is configured to operate a temperature reducing operation in response to receiving the first signal. ## Claims ### Claim 1 A method for reducing operating temperature of a source driving circuit, the method comprising: enabling a pattern detection operation; and operating a temperature reducing operation in response to detecting a preconfigured pattern in a frame to be displayed, wherein the step of operating the temperature reducing operation comprises: transmitting, by a timing controller, a first signal to the source driving circuit in response to detecting the preconfigured pattern; controlling, by the source driving circuit, a plurality of data output nodes to stay in a first state in response to receiving the first signal, wherein the first state is a high impedance state or data voltages of a currently displayed frame; and transmitting, by the timing controller, the first signal to the source driving circuit after a preconfigured period from detecting the preconfigured pattern, such that the source driving circuit returns to a normal display state from an inactive state in response to receiving the first signal. ### Claim 2 (depends on 1) The method of claim 1, wherein the temperature reducing operation comprises: controlling, by a timing controller, a gate driving circuit to not to output during a plurality of frame periods, by setting an output enable signal or a gate clock signal to be inactive. ### Claim 3 A display system, comprising: a display panel; a source driving circuit, coupled to the display panel and comprising a first output node for outputting a first signal indicating an over-temperature detecting result; a gate driving circuit; and a timing controller, comprising a second output node for outputting a control signal which indicates the gate driving circuit is active or inactive; wherein the first output node is electrically connected to the second output node and the first signal is capable of pulling the control signal to an inactive voltage level without performing a logical operation in response to that the source driving circuit detects an operating temperature increasing to be higher than a first threshold temperature, such that the gate driving circuit becomes inactive. ### Claim 4 (depends on 3) The display system of claim 3, wherein the source driving circuit is configured to control the plurality of data output nodes to stay in a first state in response to detecting the temperature increasing to be higher than the first threshold temperature. ### Claim 5 (depends on 4) The display system of claim 4, wherein the source driving circuit controls the plurality of data output nodes to stay in the first state for a preconfigured periods which starts from a frame period or a display line period next to detecting the temperature increasing to be higher than the first threshold, or, to stay in the first state until a frame period or a display line period next to detecting the temperature decreasing to be lower than a second threshold temperature. ### Claim 6 (depends on 3) The display system of claim 3, wherein the first signal is capable of pulling the control signal to the inactive voltage level for lasting a preconfigured period which starts from a frame period or a display line period next to detecting the temperature increasing to be higher than the first threshold.