# US 10,121,428 B2 · Power supply module, display device and related method of switching capacitors > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,121,428 B2 - Document ID: US10121428B2 - Status: Granted - Kind: B2 - Application number: 14/592,913 - Filed: 2015-01-09 - Published: 2016-03-31 - Granted: 2018-11-06 - Earliest claimed: 2014-09-29 - Assignees: Sitronix Technology Corp. - Applicants: Sitronix Technology Corp. - Inventors: Tsun-Sen Lin; Min-Nan Liao - Web page: https://patentgrep.com/patent/US10121428B2 ## CPC - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - H02M 3/07: using capacitors charged and discharged alternately by semiconductor devices with control electrode {, e.g. charge pumps} - G09G 2330/028: Generation of voltages supplied to electrode drivers in a matrix display other than LCD - H02M 3/075: {including a plurality of stages and two sets of clock signals, one set for the odd and one set for the even numbered stages} - 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) - H02M: APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF (transformers H01F; dynamo-electric converters H02K47/00; controlling transformers, reactors or choke coils, control or regulation of electric motors, generators or dynamo-electric converters H02P) ## Abstract A power supply module includes a source driver power supply circuit, a gate driver power supply circuit, a first capacitor group, a second capacitor group and a switch module. The source driver power supply circuit and the gate driver power supply circuit are utilized for driving a source driver and a gate driver of a display device, respectively. The first capacitor group includes at least one first storage capacitor for storing electric charges for driving source driving signals, and at least one first flying capacitor. The second capacitor group includes at least one second storage capacitor for storing electric charges for driving gate driving signals, and at least one second flying capacitor. The switch module is utilized for switching the first capacitor group to be used for the gate driver power supply circuit or switching the second capacitor group to be used for the source driver power supply circuit. ## Claims ### Claim 1 A power supply module for a display device, comprising: a source driver power supply circuit, for supplying power to a source driver of the display device; a gate driver power supply circuit, for supplying power to a gate driver of the display device; a first capacitor group, comprising: at least one first storage capacitor, for storing electric charges for driving a plurality of source driving signals; and at least one first flying capacitor, for charging the at least one first storage capacitor; a second capacitor group, comprising: at least one second storage capacitor, for storing electric charges for driving a plurality of gate driving signals; and at least one second flying capacitor, for charging the at least one second storage capacitor; and a switch module, for switching the first capacitor group connected with the source driver power supply circuit and not connected with the gate driver power supply circuit to be connected with the gate driver power supply circuit and disconnected from the source driver power supply circuit, in order to allow the electric charges stored in the at least one first storage capacitor to drive the plurality of gate driving signals, or switching the second capacitor group connected with the gate driver power supply circuit and not connected with the source driver power supply circuit to be connected with the source driver power supply circuit and disconnected from the gate driver power supply circuit, in order to allow the electric charges stored in the at least one second storage capacitor to drive the plurality of source driving signals. ### Claim 2 (depends on 1) The power supply module of claim 1, wherein the switch module switches the first capacitor group used for the source driver power supply circuit to be used for the gate driver power supply circuit during a first period, wherein the first period starts when a gate driving signal among the plurality of gate driving signals starts to output, and ends when a source driving signal among the plurality of source driving signals starts to output. ### Claim 3 (depends on 2) The power supply module of claim 2, wherein the switch module switches the first capacitor group used for the gate driver power supply circuit to be used for the source driver power supply circuit during a second period, wherein the second period starts when the source driving signal among the plurality of source driving signals starts to output, and ends when the gate driving signal among the plurality of gate driving signals reaches a predetermined gate voltage. ### Claim 4 (depends on 3) The power supply module of claim 3, wherein the switch module switches the second capacitor group used for the gate driver power supply circuit to be used for the source driver power supply circuit during a third period, wherein the third period starts when the gate driving signal among the plurality of gate driving signals reaches the predetermined gate voltage, and ends when the source driving signal among the plurality of source driving signals reaches a predetermined source voltage. ### Claim 5 (depends on 1) The power supply module of claim 1, wherein the switch module further switches the at least one first flying capacitor, in order to allow the at least one first flying capacitor to store the electric charges for driving the plurality of source driving signals, and switches the at least one second flying capacitor, in order to allow the at least one second flying capacitor to store the electric charges for driving the plurality of gate driving signals. ### Claim 6 (depends on 5) The power supply module of claim 5, wherein the switch module switches the at least one first flying capacitor and the at least one second flying capacitor during a fourth period, wherein the fourth period starts when a source driving signal among the plurality of source driving signals reaches a predetermined source voltage, and ends when a gate driving signal among the plurality of gate driving signals or the source driving signal or another source driving signal among the plurality of source driving signals starts to output. ### Claim 7 (depends on 1) The power supply module of claim 1, wherein the switch module switches the second capacitor group used for the gate driver power supply circuit to be used for the source driver power supply circuit during a fifth period, wherein the fifth period starts when a source driving signal among the plurality of source driving signals starts to output, and ends when a gate driving signal among the plurality of gate driving signals starts to output. ### Claim 8 (depends on 1) The power supply module of claim 1, wherein the switch module comprises: a first switch element, for switching a terminal of a first charge pump connected with the source driver power supply circuit to be connected with the gate driver power supply circuit, wherein the first charge pump is corresponding to the first capacitor group; and a second switch element, for switching a terminal of a second charge pump connected with the gate driver power supply circuit to be connected with the source driver power supply circuit, wherein the second charge pump is corresponding to the second capacitor group. ### Claim 9 A display device, comprising: a screen; a source driver, for outputting a plurality of source driving signals to the screen; a gate driver, for outputting a plurality of gate driving signals to the screen; and a power supply module, comprising: a source driver power supply circuit, for supplying power to the source driver; a gate driver power supply circuit, for supplying power to the gate driver; a first capacitor group, comprising: at least one first storage capacitor, for storing electric charges for driving the plurality of source driving signals; and at least one first flying capacitor, for charging the at least one first storage capacitor; a second capacitor group, comprising: at least one second storage capacitor, for storing electric charges for driving the plurality of gate driving signals; and at least one second flying capacitor, for charging the at least one second storage capacitor; and a switch module, for switching the first capacitor group connected with the source driver power supply circuit and not connected with the gate driver power supply circuit to be connected with the gate driver power supply circuit and disconnected from the source driver power supply circuit, in order to allow the electric charges stored in the at least one first storage capacitor to drive the plurality of gate driving signals, or switching the second capacitor group connected with the gate driver power supply circuit and not connected with the source driver power supply circuit to be connected with the source driver power supply circuit and disconnected from the gate driver power supply circuit, in order to allow the electric charges stored in the at least one second storage capacitor to drive the plurality of source driving signals. ### Claim 10 A method of switching capacitors for a source driver power supply circuit and a gate driver power supply circuit in a power supply module of a display device, the method comprising: switching a first capacitor group connected with the source driver power supply circuit and not connected with the gate driver power supply circuit to be connected with the gate driver power supply circuit and disconnected from the source driver power supply circuit; and switching a second capacitor group connected with the gate driver power supply circuit and not connected with the source driver power supply circuit to be connected with the source driver power supply circuit and disconnected from the gate driver power supply circuit. ### Claim 11 A power supply module for a display device, comprising: a source driver power supply circuit, for supplying power to a source driver of the display device; a gate driver power supply circuit, for supplying power to a gate driver of the display device; a first capacitor group, comprising: at least one first storage capacitor, for storing electric charges for driving a plurality of source driving signals; and at least one first flying capacitor, for charging the at least one first storage capacitor; a second capacitor group, comprising: at least one second storage capacitor, for storing electric charges for driving a plurality of gate driving signals; and at least one second flying capacitor, for charging the at least one second storage capacitor; and a switch module, for switching the first capacitor group used for the source driver power supply circuit to be used for the gate driver power supply circuit, in order to allow the electric charges stored in the at least one first storage capacitor to drive the plurality of gate driving signals, or switching the second capacitor group used for the gate driver power supply circuit to be used for the source driver power supply circuit, in order to allow the electric charges stored in the at least one second storage capacitor to drive the plurality of source driving signals, the switch module comprising: a plurality of first switch elements, each of which switches two terminals of a first capacitor in the first capacitor group connected with the source driver power supply circuit to be connected with two corresponding terminals in the gate driver power supply circuit; and a plurality of second switch elements, each of which switches two terminals of a second capacitor in the second capacitor group connected with the gate driver power supply circuit to be connected with two corresponding terminals in the source driver power supply circuit.