# US 11,308,913 B2 · Display driving 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 11,308,913 B2 - Document ID: US11308913B2 - Status: Granted - Kind: B2 - Application number: 17/201,568 - Filed: 2021-03-15 - Published: 2022-02-03 - Granted: 2022-04-19 - Earliest claimed: 2020-07-28 - Assignees: Chongqing Hkc Optoelectronics Technology Co., Ltd.; Hkc Corporation Limited - Applicants: Chongqing Hkc Optoelectronics Technology Co., Ltd.; Hkc Corporation Limited - Inventors: Mingliang Wang; Lidan Ye - Web page: https://patentgrep.com/patent/US11308913B2 ## CPC - G09G 3/3677: {suitable for active matrices only} - G09G 3/3688: {suitable for active matrices only} - G02F 1/136286: {Wiring, e.g. gate line, drain line} - G02F 1/1368: in which the switching element is a three-electrode device {(G02F1/136277 takes precedence)} - G09G 2310/0272: Details of drivers for data electrodes, the drivers communicating data to the pixels by means of a current - G09G 2320/0223: Compensation for problems related to R-C delay and attenuation in electrodes of matrix panels, e.g. in gate electrodes or on-substrate video signal electrodes - G09G 2320/0233: Improving the luminance or brightness uniformity across the screen - 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 The present application provides a display driving circuit and display panel, including a drive, which includes a driving signal output terminal and an enable signal input terminal, the driving signal output terminal being electrically connected with a data line of the display panel; and a detector, which includes a detection signal input terminal and an enable signal output terminal, the detection signal input terminal is electrically connected with a gate signal terminal of a preset row of the display panel, and the enable signal output terminal is electrically connected with the enable signal input terminal of the drive; the detector is for detecting a gate signal of the preset row, and output a corresponding enable signal according to a detection result, and the drive is for outputting different driving signals according to different enable signals. ## Claims ### Claim 1 A display driving circuit for driving a display panel, comprising: a drive comprising a driving signal output terminal and an enable signal input terminal, the driving signal output terminal being electrically connected with a data line of the display panel; and a detector comprising a detection signal input terminal and an enable signal output terminal, the detection signal input terminal being electrically connected with a gate signal terminal of a preset row of the display panel, and the enable signal output terminal being electrically connected with the enable signal input terminal of the drive; wherein the detector is for detecting a gate signal of the preset row, and output a corresponding enable signal according to a detection result, and the drive is for outputting different driving signals according to different enable signals. ### Claim 2 (depends on 1) The display driving circuit according to claim 1, wherein the detector further comprises an initial signal input terminal, the detector is also for outputting an enable signal corresponding to an initial signal input through the initial signal input terminal. ### Claim 3 (depends on 2) The display driving circuit according to claim 2, wherein the detector comprises: a first semiconductor transistor, wherein a gate of the first semiconductor transistor is connected with the detection signal input terminal, and a source of the first semiconductor transistor is grounded; and a second semiconductor transistor, wherein a source of the second semiconductor transistor is connected with an external power source, a drain of the second semiconductor transistor is connected with the enable signal output terminal, and a drain of the first semiconductor transistor is connected with a drain of the second semiconductor transistor; when the detection signal input terminal is input with a high-level signal, the first semiconductor transistor and the second semiconductor transistor are both conducted. ### Claim 4 (depends on 3) The display driving circuit according to claim 3, wherein the detector further comprises a third resistor, the third resistor is connected between the detection signal input terminal and the drain of the second semiconductor transistor. ### Claim 5 (depends on 4) The display driving circuit according to claim 4, wherein the detector further comprises a first resistor, one terminal of the first resistor is connected with the third resistor, and another terminal of the first resistor is grounded. ### Claim 6 (depends on 3) The display driving circuit according to claim 3, wherein the detector further comprises a second resistor, one terminal of the second resistor is connected with the drain of the second semiconductor transistor, and another terminal of the second resistor is connected with a gate of the second semiconductor transistor. ### Claim 7 (depends on 3) The display driving circuit according to claim 3, wherein the detector further comprises a third semiconductor transistor, a gate of the third semiconductor transistor is connected with the initial signal input terminal, a source of the third semiconductor transistor is grounded, and a drain of the third semiconductor transistor is connected with the enable signal output terminal; the third semiconductor transistor is conducted when the initial signal input terminal is input with the high-level signal. ### Claim 8 (depends on 3) The display driving circuit according to claim 3, wherein a self-locking module is provided in the detector, and the self-locking module of the detector is for being self-locked to enable the enable signal output terminal of the detector to always output a high-level enable signal, after the detector detects the high-level signal. ### Claim 9 (depends on 8) The display driving circuit according to claim 8, wherein the self-locking module is a third resistor, the third resistor is connected between the detection signal input terminal and the drain of the second semiconductor transistor, and the third resistor is connected with the gate of the first semiconductor transistor. ### Claim 10 (depends on 3) The display driving circuit according to claim 3, wherein the first semiconductor transistor is an N-type semiconductor transistor, the second semiconductor transistor is a P-type semiconductor transistor. ### Claim 11 (depends on 1) The display driving circuit according to claim 1, wherein the drive comprises a data driving circuit, which comprises: a data driving module comprising a signal input terminal and a signal output terminal, and the signal output terminal being the driving signal output terminal of the drive; a first current source for providing a first reference current signal; a second current source for providing a second reference current signal; and a switch being switched according to an enable signal of the detector to connect the signal input terminal of the data driving module with the first current source or with the second current source. ### Claim 12 (depends on 11) The display driving circuit according to claim 11, wherein a current value of the first reference current signal provided by the first current source is less than a current value of the second reference current signal provided by the second current source. ### Claim 13 (depends on 1) The display driving circuit according to claim 1, wherein at least two current sources are provided in the drive and switchable therebetween to change driving signals according to different enable signals input by the detector and received by the drive. ### Claim 14 (depends on 1) The display driving circuit according to claim 1, wherein the data driving module further comprises a timing signal input terminal, the timing signal input terminal is electrically connected with a timing control circuit and for receiving a timing signal output by the timing control circuit. ### Claim 15 A display driving circuit for driving a display panel, wherein the display driving circuit comprises: a drive comprising a driving signal output terminal and an enable signal input terminal, the driving signal output terminal being electrically connected with a data line of the display panel; and a detector comprising a detection signal input terminal and an enable signal output terminal, the detection signal input terminal being electrically connected with a gate signal terminal of a preset row of the display panel, and the enable signal output terminal being electrically connected with the enable signal input terminal of the drive; wherein the detector is for outputting a first enable signal when a gate signal of the preset row is detected to be a low-level signal, and outputting a second enable signal when the gate signal of the preset row is detected to be a high-level signal, the drive is for outputting a first driving signal according to the first enable signal, and outputting a second driving signal according to the second enable signal, a current value of the first driving signal is less than a current value of the second driving signal. ### Claim 16 (depends on 15) The display driving circuit according to claim 15, wherein the detector further comprises an initial signal input terminal, the detector is also for outputting an enable signal corresponding to an initial signal input through the initial signal input terminal. ### Claim 17 (depends on 16) The display driving circuit according to claim 16, wherein the detector comprises: a first semiconductor transistor, wherein a gate of the first semiconductor transistor is connected with the detection signal input terminal, and a source of the first semiconductor transistor is grounded; and a second semiconductor transistor, wherein a source of the second semiconductor transistor is connected with an external power source, a drain of the second semiconductor transistor is connected with the enable signal output terminal, and a drain of the first semiconductor transistor is connected with a drain of the second semiconductor transistor; when the detection signal input terminal is input with a high-level signal, the first semiconductor transistor and the second semiconductor transistor are both conducted. ### Claim 18 (depends on 16) The display driving circuit according to claim 16, wherein the detector further comprises a third resistor, the third resistor is connected between the detection signal input terminal and the drain of the second semiconductor transistor. ### Claim 19 (depends on 15) The display driving circuit according to claim 15, wherein the drive comprises a data driving circuit which comprises: a data driving module comprising a signal input terminal and a signal output terminal, and the signal output terminal being the driving signal output terminal of the drive; a first current source for providing a first reference current signal; a second current source for providing a second reference current signal; and a switch being switched according to an enable signal of the detector to connect the signal input terminal of the data driving module with the first current source or with the second current source. ### Claim 20 A display panel, comprising: a liquid crystal screen, wherein the liquid crystal screen comprises a data line and a scan line, the data line and the scan line are all connected with a thin film transistor on the liquid crystal screen, the scan line is for controlling the thin film transistor to turn on or turn off, the data line is for charging the thin film transistor; a display driving circuit connected with the liquid crystal screen and for driving the liquid crystal screen to display; wherein, the display driving circuit comprises: a drive, wherein the drive comprises a driving signal output terminal and an enable signal input terminal, the driving signal output terminal is electrically connected with a data line of the display panel; and a detector, wherein the detector comprises a detection signal input terminal and an enable signal output terminal, the detection signal input terminal is electrically connected with a gate signal terminal of a preset row of the display panel, and the enable signal output terminal is electrically connected with the enable signal input terminal of the drive; wherein the detector is for detecting a gate signal of the preset row, and output a corresponding enable signal according to a detection result, and the drive is for outputting different driving signals according to different enable signals.