# US 11,443,666 B2 · Drive circuit for adjusting a voltage required for aging detection using a feedback circuit, and display panel > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 11,443,666 B2 - Document ID: US11443666B2 - Status: Granted - Kind: B2 - Application number: 17/273,315 - Filed: 2018-12-07 - Published: 2021-10-28 - Granted: 2022-09-13 - Earliest claimed: 2018-11-21 - Assignees: Hkc Corporation Limited - Applicants: Hkc Corporation Limited - Inventors: Xiaoyu Huang - Web page: https://patentgrep.com/patent/US11443666B2 ## CPC - 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)} - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 2320/043: Preventing or counteracting the effects of ageing - 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) ## Abstract A drive circuit for adjusting a voltage required for aging detection using a feedback circuit comprises a drive chip (100), a detection signal generation circuit (200), and a feedback circuit (300). The drive chip (100) is configured to output a working voltage. The detection signal generation circuit (200) is configured to generate a detection control signal for aging detection according to a received trigger signal. The feedback circuit (300) is configured to receive the detection control signal output by the detection signal generation circuit (200) and the working voltage provided by the drive chip (100) and to generate a feedback voltage according to the detection control signal and the working voltage and output the feedback voltage to the drive chip (100), such that the drive chip (100) adjusts, according to the feedback voltage, the working voltage to a voltage required for aging detection. A display panel is also provided. ## Claims ### Claim 1 A drive circuit comprising: a drive chip for outputting a working voltage; a detection signal generation circuit for receiving a trigger signal and generating a detection control signal for an aging detection according to the trigger signal; and a feedback circuit, a first input terminal of the feedback circuit being electrically connected with a voltage output terminal of the drive chip, a second input terminal of the feedback circuit being electrically connected with an output terminal of the detection signal generation circuit, an output terminal of the feedback circuit being electrically connected with a feedback voltage input terminal of the drive chip, the feedback circuit being configured for receiving the detection control signal output by the detection signal generation circuit and the working voltage provided by the drive chip, generating a feedback voltage according to the detection control signal and the working voltage and output the feedback voltage to the drive chip, thereby the drive chip adjusting the working voltage to a voltage required for the aging detection according to the feedback voltage, wherein the feedback circuit comprises: an adjustment branch electrically connected with the voltage output terminal of the drive chip through the first input terminal of the feedback circuit, and electrically connected with the feedback voltage input terminal of the drive chip through the output terminal of the feedback circuit, the adjustment branch being configured for generating the feedback voltage according to the detection control signal and the working voltage and outputting the feedback voltage to the drive chip, thereby the drive chip adjusting the working voltage to the voltage required for the aging detection according to the feedback voltage; and a switch branch, a first input terminal of the switch branch being electrically connected with the output terminal of the detection signal generation circuit, a second input terminal of the switch branch being electrically connected with the adjustment branch through a second output terminal of the adjustment branch, and an output terminal of the switch branch being electrically connected with the feedback voltage input terminal of the drive chip and the output terminal of the feedback circuit, and the switch branch being configured for receiving the detection control signal and controlling the feedback voltage output by the adjustment branch according to the detection control signal. ### Claim 2 (depends on 1) The drive circuit of claim 1, wherein the switch branch comprises a switch tube, a gate of the switch tube being electrically connected to the output terminal of the detection signal generation circuit, a drain of the switch tube being electrically connected to the feedback voltage input terminal of the drive chip and the output terminal of the feedback circuit, and a source of the switch tube being electrically connected to the second output terminal of the adjustment branch. ### Claim 3 (depends on 2) The drive circuit of claim 2, wherein the adjustment branch comprises: a first resistor, one terminal of the first resistor being electrically connected with the feedback voltage input terminal of the drive chip, and another terminal of the first resistor being grounded; a second resistor, one terminal of the second resistor being electrically connected with the voltage output terminal of the drive chip, and another terminal of the second resistor being electrically connected with the first resistor, the feedback voltage input terminal of the drive chip and the drain of the switch tube; and a third resistor, one terminal of the third resistor being electrically connected with the source of the switch tube, and another terminal of the third resistor being electrically connected with the voltage output terminal of the drive chip and the second resistor. ### Claim 4 (depends on 3) The drive circuit of claim 3, wherein the detection signal generation circuit comprises: a voltage input branch for receiving the trigger signal; and a trigger branch electrically connected with the voltage input branch and the feedback circuit, wherein the trigger signal is input to the trigger branch through the voltage input branch, and the trigger branch is configured for generating the detection control signal according to the trigger signal and supplying the detection control signal to the feedback circuit. ### Claim 5 (depends on 4) The drive circuit of claim 4, wherein the voltage input branch comprises a trigger signal input terminal electrically connected to a second input terminal of the trigger branch. ### Claim 6 (depends on 5) The drive circuit of claim 5, wherein the trigger branch comprises: a flip-flop, a first input terminal of the flip-flop being electrically connected with a forward output terminal of the flip-flop and the gate of the switch tube, and a second input terminal of the flip-flop being electrically connected with the trigger signal input terminal; an inverter, an input terminal of the inverter being electrically connected with the forward output terminal of the flip-flop, and an output terminal of the inverter being electrically connected with the first input terminal of the flip-flop and the gate of the switch tube; and a fourth resistor, one terminal of the fourth resistor being electrically connected with the first input terminal of the flip-flop, the output terminal of the inverter and the gate of the switch tube, and another terminal of the fourth resistor being grounded. ### Claim 7 (depends on 6) The drive circuit of claim 6, wherein the flip-flop is a D flip-flop. ### Claim 8 (depends on 5) The drive circuit of claim 5, wherein the trigger branch comprises: a flip-flop, a first input terminal of the flip-flop being electrically connected with a reverse output terminal of the flip-flop and the gate of the switch tube, and a second input terminal of the flip-flop being electrically connected with the trigger signal input terminal; and a fourth resistor, one terminal of the fourth resistor being electrically connected with the first input terminal of the flip-flop, the reverse output terminal of the flip-flop and the gate of the switch tube, and another terminal of the fourth resistor being grounded. ### Claim 9 (depends on 2) The drive circuit of claim 2, wherein the switch tube is a triode or a field effect transistor. ### Claim 10 (depends on 9) The drive circuit of claim 9, wherein the switch tube is a P-type switch tube. ### Claim 11 A display panel comprising: a display area for displaying according to a drive signal, and a peripheral circuit area electrically connected with the display area for supplying power to the display area and providing the drive signal; wherein the peripheral circuit area comprises a drive circuit, and the drive circuit comprises: a drive chip for outputting a working voltage; a detection signal generation circuit for receiving a trigger signal and generating a detection control signal for an aging detection according to the trigger signal; and a feedback circuit, a first input terminal of the feedback circuit being electrically connected with a voltage output terminal of the drive chip, a second input terminal of the feedback circuit being electrically connected with an output terminal of the detection signal generation circuit, an output terminal of the feedback circuit being electrically connected with a feedback voltage input terminal of the drive chip, the feedback circuit being configured for receiving the detection control signal output by the detection signal generation circuit and the working voltage provided by the drive chip, generating a feedback voltage according to the detection control signal and the working voltage and output the feedback voltage to the drive chip, thereby the drive chip adjusting the working voltage to a voltage required for the aging detection according to the feedback voltage, wherein the feedback circuit comprises: an adjustment branch electrically connected with the voltage output terminal of the drive chip through the first input terminal of the feedback circuit, and electrically connected with the feedback voltage input terminal of the drive chip through the output terminal of the feedback circuit, the adjustment branch being configured for generating the feedback voltage according to the detection control signal and the working voltage and outputting the feedback voltage to the drive chip, thereby the drive chip adjusting the working voltage to the voltage required for the aging detection according to the feedback voltage; and a switch branch, a first input terminal of the switch branch being electrically connected with the output terminal of the detection signal generation circuit, a second input terminal of the switch branch being electrically connected with the adjustment branch through a second output terminal of the adjustment branch, and an output terminal of the switch branch being electrically connected with the feedback voltage input terminal of the drive chip and the output terminal of the feedback circuit, and the switch branch being configured for receiving the detection control signal and controlling the feedback voltage output by the adjustment branch according to the detection control signal. ### Claim 12 (depends on 11) The display panel of claim 11, wherein the switch branch comprises: a switch tube, a gate of switch tube being electrically connected to the output terminal of the detection signal generation circuit, a drain of the switch tube being electrically connected to the feedback voltage input terminal of the drive chip and the output terminal of the feedback circuit, and a source of the switch tube being electrically connected to the second output terminal of the adjustment branch. ### Claim 13 (depends on 12) The display panel of claim 12, wherein the adjustment branch comprises: a first resistor, one terminal of the first resistor being electrically connected with the feedback voltage input terminal of the drive chip, and another terminal of the first resistor being grounded; a second resistor, one terminal of the second resistor being electrically connected with the voltage output terminal of the drive chip, and another terminal of the second resistor being electrically connected with the first resistor, the feedback voltage input terminal of the drive chip and the drain of the switch tube; and a third resistor, one terminal of the third resistor being electrically connected with the source of the switch tube, and another terminal of the third resistor being electrically connected with the voltage output terminal of the drive chip and the second resistor. ### Claim 14 (depends on 13) The display panel of claim 13, wherein the detection signal generation circuit comprises: a voltage input branch for receiving the trigger signal; and a trigger branch electrically connected with the voltage input branch and the feedback circuit, wherein the trigger signal is input to the trigger branch through the voltage input branch, and the trigger branch is configured for generating the detection control signal according to the trigger signal and supplying the detection control signal to the feedback circuit. ### Claim 15 (depends on 14) The display panel of claim 14, wherein the voltage input branch comprises a trigger signal input terminal electrically connected to a second input terminal of the trigger branch. ### Claim 16 (depends on 15) The display panel of claim 15, wherein the trigger branch comprises: a flip-flop, a first input terminal of the flip-flop being electrically connected with a forward output terminal of the flip-flop and the gate of the switch tube, and a second input terminal of the flip-flop being electrically connected with the trigger signal input terminal; an inverter, an input terminal of the inverter being electrically connected with the forward output terminal of the flip-flop, and an output terminal of the inverter being electrically connected with the first input terminal of the flip-flop and the gate of the switch tube; and a fourth resistor, one terminal of the fourth resistor being electrically connected with the first input terminal of the flip-flop, the output terminal of the inverter and the gate of the switch tube, and another terminal of the fourth resistor being grounded. ### Claim 17 (depends on 16) The display panel of claim 16, wherein the flip-flop is a D flip-flop. ### Claim 18 (depends on 15) The display panel of claim 15, wherein the trigger branch comprises: a flip-flop, a first input terminal of the flip-flop being electrically connected with a reverse output terminal of the flip-flop and the gate of the switch tube, and a second input terminal of the flip-flop being electrically connected with the trigger signal input terminal; and a fourth resistor, one terminal of the fourth resistor being electrically connected with the first input terminal of the flip-flop, the reverse output terminal of the flip-flop and the gate of the switch tube, and another terminal of the fourth resistor being grounded.