# US 2021/0241685 A1 · Drive device for display panel, drive method thereof and display apparatus > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2021/0241685 A1 - Document ID: US20210241685A1 - Status: Published application - Kind: A1 - Application number: 16/649,374 - Filed: 2019-04-09 - Published: 2021-08-05 - Earliest claimed: 2019-04-09 - Assignees: Chengdu Boe Optoelectronics Technology Co., Ltd.; Boe Technology Group Co., Ltd. - Applicants: Chengdu BOE Optoelectronics Technology Co., Ltd.; BOE Technology Group Co., Ltd. - Inventors: Yanni Jiang; Euncheol Eom; Guoqiang Wu - Web page: https://patentgrep.com/patent/US20210241685A1 ## CPC - G09G 3/3208: organic, e.g. using organic light-emitting diodes [OLED] - G05F 1/46: wherein the variable actually regulated by the final control device is DC (G05F1/625 takes precedence) - G09G 2330/021: Power management, e.g. power saving - 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) - G05F: SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES ## Abstract A drive device for a display panel, a drive method thereof and a display apparatus. The drive device for the display panel includes: a power management circuit and an internal driver circuit; wherein the power management circuit is configured to provide a first power supply voltage to a digital power supply terminal, the internal driver circuit is configured to convert a second power supply voltage provided by a power supply terminal into a third power supply voltage and provide the third power supply voltage to the digital power supply terminal, and the digital power supply terminal is configured to provide a drive voltage to the display panel. ## Claims ### Claim 1 A drive device for a display panel, comprising: a power management circuit, configured to provide a power supply voltage to a digital power supply terminal; and an internal driver circuit, configured to convert a second power supply voltage provided by a power supply terminal into a third power supply voltage and provide the third power supply voltage to the digital supply power terminal, wherein the digital power supply terminal is configured to provide a drive voltage to the display panel. ### Claim 2 (depends on 1) The drive device according to claim 1, wherein the internal driver circuit is configured to convert the second power supply voltage provided by the power supply terminal into the third power supply voltage and provide the third power supply voltage to the digital power supply terminal when a voltage of the digital power supply terminal is lower than a reference voltage, and stop providing a power supply voltage when the voltage of the digital power supply terminal is not lower than the reference voltage, wherein the reference voltage is lower than a rated operating voltage of the digital power supply terminal. ### Claim 3 (depends on 2) The drive device according to claim 2, wherein the internal driver circuit is further configured to detect whether the voltage of the digital power supply terminal is lower than the reference voltage. ### Claim 4 (depends on 3) The drive device according to claim 3, wherein the internal driver circuit is configured to detect whether the voltage of the digital power supply terminal is lower than the reference voltage after receiving a first enable instruction. ### Claim 5 (depends on 2) The drive device according to claim 2, wherein a difference value between the rated operating voltage and the reference voltage is less than or equal to 0.05 volts. ### Claim 6 (depends on 1) The drive device according to claim 1, wherein the power management circuit is configured to provide the first power supply voltage to the digital power supply terminal after receiving a second enable instruction. ### Claim 7 (depends on 1) The drive device according to claim 1, wherein the internal driver circuit is further connected to the power management circuit; and the internal driver circuit is further configured to send a second enable instruction to the power management circuit. ### Claim 8 (depends on 7) The drive device according to claim 7, wherein the internal driver circuit is configured to send the second enable instruction to the power management circuit after being powered on. ### Claim 9 (depends on 7) The drive device according to claim 7, wherein the internal driver circuit is configured to send the second enable instruction to the power management circuit after receiving a first enable instruction. ### Claim 10 (depends on 1) The drive device according to claim 1, wherein the internal driver circuit comprises: a low dropout regulator; wherein an input terminal of the low dropout regulator is connected to the power supply terminal, an output terminal and a feedback signal terminal of the low dropout regulator are connected to the digital power supply terminal, and a reference signal terminal of the low dropout regulator is connected to a reference power supply terminal which is configured to provide the reference voltage. ### Claim 11 (depends on 1) The drive device according to claim 1, comprising: a digital circuit; wherein the digital circuit is connected to the digital power supply terminal, and is configured to provide a drive voltage to the display panel under the drive of the digital power supply terminal. ### Claim 12 (depends on 1) The drive device according to claim 1, comprising: a flexible circuit board; wherein the power management circuit is disposed on a printed circuit board, the internal driver circuit is disposed on a chip on film, and the flexible circuit board is connected to the printed circuit board and the chip on film. ### Claim 13 A drive method for a drive device, comprising: providing, by a power management circuit, a first power supply voltage to a digital power supply terminal; and converting, by an internal driver circuit, a second power supply voltage provided by a power supply terminal into a third power supply voltage and providing the third power supply voltage to the digital power supply terminal; wherein the digital power supply terminal is configured to provide a drive voltage to a display panel. ### Claim 14 (depends on 13) The method according to claim 13, wherein converting, by the internal driver circuit, the second power supply voltage provided by the power supply terminal into the third power supply voltage and providing the third power supply voltage to the digital power supply terminal comprises: converting, by the internal driver circuit, the second power supply voltage provided by the power supply terminal into the third power supply voltage and providing the third power supply voltage to the digital power supply terminal, when a voltage of the digital power supply terminal is lower than a reference voltage; and the method further comprises: controlling the internal driver circuit to stop providing a power supply voltage when the voltage of the digital power supply terminal is lower than the reference voltage; wherein the reference voltage is lower than a rated operating voltage of the digital power supply terminal. ### Claim 15 (depends on 14) The method according to claim 14, wherein prior to converting, by the internal driver circuit, the second power supply voltage provided by the power supply terminal into the third power supply voltage and providing the third power supply voltage to the digital power supply terminal, the method further comprises: detecting whether the voltage of the digital power supply terminal is lower than the reference voltage after receiving a first enable instruction. ### Claim 16 (depends on 13) The method according to claim 13, wherein providing, by the power management circuit, the first power supply voltage to the digital power supply terminal comprises: sending, by the internal driver circuit, a second enable instruction to the power management circuit to drive the power management circuit to provide the first power supply voltage to the digital power supply terminal. ### Claim 17 (depends on 16) The method according to claim 16, wherein sending, by the internal driver circuit, the second enable instruction to the power management circuit comprises: sending, by the internal driver circuit, the second enable instruction to the power management circuit after the internal driver circuit is powered on; or, sending the second enable instruction to the power management circuit after receiving a first enable instruction. ### Claim 18 A display apparatus, comprising a display panel, and a drive device connected to the display panel, the drive device comprising: a power management circuit, configured to provide a power supply voltage to a digital power supply terminal; and an internal driver circuit, configured to convert a second power supply voltage provided by a power supply terminal into a third power supply voltage and provide the third power supply voltage to the digital supply power terminal, wherein the digital power supply terminal is configured to provide a drive voltage to the display panel. ### Claim 19 (depends on 18) The display apparatus according to claim 18, wherein the display panel is an organic light-emitting diode display panel. ### Claim 20 (depends on 13) A computer-readable storage medium, having stored thereon an instruction, wherein when the computer-readable storage medium runs on a computer, the computer is enabled to execute the drive method claim 13.