# US 2021/0280651 A1 · Control method and control device of display power supply, storage medium and electronic apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0280651 A1 - Document ID: US20210280651A1 - Status: Published application - Kind: A1 - Application number: 16/328,287 - Filed: 2018-05-24 - Published: 2021-09-09 - Earliest claimed: 2017-07-13 - Assignees: KunShan Go-Visionox Opto-Electronics Co., Ltd - Applicants: Kunshan Go-Visionox Opto-Electronics Co., Ltd. - Inventors: Yuqing WANG; Zheng WANG; Xiaobao ZHANG; Mingwei GE - Web page: https://patentgrep.com/patent/US20210280651A1 ## CPC - G09G 3/3225: using an active matrix - H10K 59/1213: {the pixel elements being TFTs} - 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} - G09G 3/3258: with pixel circuitry controlling the voltage across the light-emitting element - G09G 3/36: using liquid crystals - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - H10D 30/67: Thin-film transistors [TFT] {(Stacked nanowire, nanosheet or nanoribbon FETs H10D30/501)} - G09G 2330/026: Arrangements or methods related to booting a display - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - 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 - H10D: INORGANIC ELECTRIC SEMICONDUCTOR DEVICES ## Abstract A control method and a control device of display power supply, and an electronic device, applied to a TFT (thin film transistor) display screen. The TFT display screen includes a drive IC and a screen body; the drive IC is configured to control the screen body to display a corresponding image, and the screen body controls a pixel via a thin film transistor; the control method includes: controlling a power supply of the drive IC to power up according to a set rule after receiving a start signal for reducing a probability of abnormality in a voltage outputted by the drive IC; and supplying power continuously and normally to the drive IC. ## Claims ### Claim 1 A control method of display power supply, applied to a thin film transistor display screen comprising a drive IC and a screen body, the drive IC controlling the screen body to display a corresponding image, and the screen body controlling a pixel via a thin film transistor; the control method comprising: controlling a power supply of the drive IC to power up according to a set rule after receiving a start signal for reducing a probability of abnormality in a voltage outputted by the drive IC; and supplying power continuously and normally to the drive IC. ### Claim 2 (depends on 1) The control method according to claim 1, wherein the drive IC comprises a power management circuit; the controlling a power supply of the drive IC to power up according to a set rule after receiving a start signal comprising: controlling a power supply voltage of the power management circuit to power up according to the set rule after receiving the start signal for reducing the probability that the gate driving negative voltage outputted by the drive IC is abnormally raised. ### Claim 3 (depends on 2) The control method according to claim 2, wherein, the controlling a power supply voltage of the power management circuit to power up according to the set rule after receiving the start signal comprises: controlling the power supply voltage of the power management circuit to normally power up to a first level after receiving the start signal; controlling the power supply voltage of the power management circuit to reduce to a second level after a first time period, the second level being lower than the first level; and controlling the power supply voltage of the power management circuit to rise again to the first level after a second time period. ### Claim 4 (depends on 3) The control method according to claim 3, wherein the first level sustains between 2.5 V and 4.8 V. ### Claim 5 (depends on 4) The control method according to claim 4, wherein the first time period sustains between 8 ms and 12 ms. ### Claim 6 (depends on 4) The control method according to claim 4, wherein the first time period sustains about 10 ms. ### Claim 7 (depends on 3) The control method according to claim 3, wherein the second level sustains between 1 V and 2.2 V. ### Claim 8 (depends on 1) The control method according to claim 1, wherein the drive IC comprises a power management circuit and a digital circuit, and the controlling a power supply of the drive IC to power up according to a set rule after receiving a start signal comprises: controlling a power supply voltage of the power management circuit to power up after receiving the start signal; and controlling a power supply voltage of the digital circuit to power up after a third time period. ### Claim 9 (depends on 8) The control method according to claim 8, wherein the third time period sustains between 90 ms and 110 ms. ### Claim 10 (depends on 8) The control method according to claim 8, wherein the third time period sustains about 100 ms. ### Claim 11 (depends on 8) The control method according to claim 8, wherein the controlling a power supply voltage of the digital circuit to power up after a third time period comprises: controlling the power supply voltage of the digital circuit to power up after the power supply voltage of the power management circuit is stepped down in the drive IC. ### Claim 12 (depends on 8) The control method according to claim 8, wherein the controlling of the power supply voltage of the digital circuit to power up after the power supply voltage of the power management circuit is stepped down in the drive IC comprises: reducing a power supply voltage of the power management circuit to a first voltage and then reducing the first voltage to a second voltage in the drive IC, then controlling the power supply voltage of the digital circuit to power up, the second voltage is a reference voltage used by the power management circuit. ### Claim 13 A control device of display power supply, applied to a thin film transistor display screen comprising a drive IC and a screen body, the drive IC controlling the screen body to display a corresponding image, and the screen body controlling a pixel via a thin film transistor; the control device comprising: a power-up control circuit controlling a power supply of the drive IC to power up according to a set rule after receiving a start signal for reducing a probability of abnormality in a voltage outputted by the drive IC; and a normal power supply supplying power continuously and normally to the drive IC. ### Claim 14 (depends on 17) The control device according to claim 17, wherein the drive IC comprises a power management circuit and a digital circuit, after the power supply voltage of the power management circuit is stepped down, the power supply voltage of the digital circuit is powered up. ### Claim 15 An electronic device, comprising a power IC, a drive IC, and a screen body; the power IC comprising a memory in which a program being stored, wherein when the program is executed by the processor, causing the processor to perform: controlling a power supply of the drive IC to power up according to a set rule after receiving a start signal for reducing a probability of abnormality in a voltage outputted by the drive IC; and supplying power continuously and normally to the drive IC. ### Claim 16 (canceled) ### Claim 17 (depends on 12) The control method according to claim 12, wherein the first voltage is a voltage produced by a charge pump in the power management circuit.