# US 10,319,285 B2 · Panel drive device and display device > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,319,285 B2 - Document ID: US10319285B2 - Status: Granted - Kind: B2 - Application number: 15/566,035 - Filed: 2017-04-25 - Published: 2019-03-14 - Granted: 2019-06-11 - Earliest claimed: 2016-06-03 - Assignees: Boe Technology Group Co., Ltd.; Hefei Xinsheng Optoelectronics Technology Co., Ltd. - Applicants: Boe Technology Group Co., Ltd; Hefei Xinsheng Optoelectronics Technology Co., Ltd. - Inventors: Yanping Zhang; Tao Ma - Web page: https://patentgrep.com/patent/US10319285B2 ## CPC - G09G 3/2096: {Details of the interface to the display terminal specific for a flat panel (suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167)} - G02F 1/13306: {Circuit arrangements or driving methods for the control of single liquid crystal cells (G02F1/132, G02F1/133382 take precedence)} - G09G 3/36: using liquid crystals - G09G 3/3696: {Generation of voltages supplied to electrode drivers} - G09G 3/3611: {Control of matrices with row and column drivers} - 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 Embodiments of the present disclosure provides a panel drive device and a display device. The panel drive device includes an interface module, a voltage conversion module and a compensation module. The interface module includes a first input end and a first output end. The voltage conversion module includes a second input end and a second output end. The first output end is coupled with the second input end. A voltage at the first input end is a first voltage, a voltage at the first output end is a second voltage, a voltage at the second input end is a third voltage signal and a voltage at the second output end is a fourth voltage signal. The compensation module is configured to generate a compensation voltage signal according to the third voltage signal and apply the compensation voltage signal to the first input end or the first output end, so that the third voltage signal equals to the first voltage signal. The panel drive device and the display device according to embodiments of the present disclosure are able to compensate for the losses in the transmission cables as well as in the wires of the printed circuit board, thereby avoiding abnormal operations of the liquid crystal panel. ## Claims ### Claim 1 A panel drive device, comprising an interface module, a voltage conversion module and a compensation module, wherein: the interface module comprises a first input end and a first output end, the voltage conversion module comprises a second input end and a second output end, and the first output end is coupled with the second input end; a voltage signal at the first input end is a first voltage signal, a voltage signal at the first output end is a second voltage signal, a voltage signal at the second input end is a third voltage signal and a voltage signal at the second output end is a fourth voltage signal; and the compensation module is configured to generate a compensation voltage signal according to the third voltage signal and apply the compensation voltage signal to the first input end or the first output end, so that a value of the third voltage signal equals to a value of the first voltage signal. ### Claim 2 (depends on 1) The panel drive device according to claim 1, wherein the compensation module comprises a first resistor, a differential amplifier circuit and a conversion unit, wherein a first end of the first resistor receives the third voltage signal, a second end of the first resistor is grounded, two input ends of the differential amplifier circuit are coupled with two ends of the first resistor respectively, and an output end of the differential amplifier circuit is coupled with the conversion unit. ### Claim 3 (depends on 2) The panel drive device according to claim 2, wherein the differential amplifier circuit comprises a differential amplifier, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor, wherein one end of the third resistor is coupled with the first end of the first resistor, and the other end of the third resistor is coupled with a first input end of the differential amplifier; one end of the fourth resistor is coupled with the second end of the first resistor, and the other end of the fourth resistor is coupled with the a second input end of the differential amplifier; one end of the fifth resistor is grounded, and the other end of the fifth resistor is coupled with the first input end of the differential amplifier; one end of the sixth resistor is coupled with the second input end of the differential amplifier, and the other end of the sixth resistor is coupled with an output end of the differential amplifier. ### Claim 4 (depends on 3) The panel drive device according to claim 3, wherein in the differential amplifier circuit, a ratio of a resistance of the fifth resistor to a resistance of the third resistor equals to a ratio of a resistance of the sixth resistor to a resistance of the fourth resistor. ### Claim 5 (depends on 2) The panel drive device according to claim 2, wherein the conversion unit is configured to multiply a difference value between a reference voltage of an output voltage of the differential amplifier and the output voltage of the differential amplifier by a preset coefficient, to obtain a value of the compensation voltage signal. ### Claim 6 (depends on 1) The panel drive device according to claim 1, wherein the compensation module comprises a first resistor, a second resistor, a differential amplifier circuit and a conversion unit, wherein a first end of the first resistor receives the third voltage signal and a second end of the first resistor is grounded via the second resistor, two input ends of the differential amplifier circuit are coupled with two ends of the first resistor respectively, and an output end of the differential amplifier circuit is coupled with the conversion unit. ### Claim 7 (depends on 1) The panel drive device according to claim 1, wherein the panel drive device further comprises a timing controller configured to receive a first control signal from the interface module, receive the fourth voltage signal from the voltage conversion module and output a second control signal. ### Claim 8 (depends on 7) The panel drive device according to claim 7, wherein the panel drive device further comprises a gate drive circuit configured to receive the second control signal from the timing controller and output a gate drive signal. ### Claim 9 (depends on 1) The panel drive device according to claim 1, wherein the panel drive device further comprises a gamma circuit configured to receive the fourth voltage signal from the voltage conversion module, receive a data signal from the interface module and output a gamma voltage signal. ### Claim 10 (depends on 9) The panel drive device according to claim 9, wherein the panel drive device further comprises a source drive circuit configured to receive the fourth voltage signal from the voltage conversion module, receive the gamma voltage signal from the gamma circuit and output a source drive signal. ### Claim 11 A display device, comprising a panel drive device, wherein the panel drive device comprising an interface module, a voltage conversion module and a compensation module, wherein: the interface module comprises a first input end and a first output end, the voltage conversion module comprises a second input end and a second output end, and the first output end is coupled with the second input end; a voltage signal at the first input end is a first voltage signal, a voltage signal at the first output end is a second voltage signal, a voltage signal at the second input end is a third voltage signal and a voltage signal at the second output end is a fourth voltage signal; and the compensation module is configured to generate a compensation voltage signal according to the third voltage signal and apply the compensation voltage signal to the first input end or the first output end, so that a value of the third voltage signal equals to a value of the first voltage signal. ### Claim 12 (depends on 11) The display device according to claim 11, wherein the compensation module comprises a first resistor, a differential amplifier circuit and a conversion unit, wherein a first end of the first resistor receives the third voltage signal, a second end of the first resistor is grounded, two input ends of the differential amplifier circuit are coupled with two ends of the first resistor respectively, and an output end of the differential amplifier circuit is coupled with the conversion unit. ### Claim 13 (depends on 12) The display device according to claim 12, wherein the differential amplifier circuit comprises a differential amplifier, a third resistor, a fourth resistor, a fifth resistor and a sixth resistor, wherein one end of the third resistor is coupled with the first end of the first resistor, and the other end of the third resistor is coupled with a first input end of the differential amplifier; one end of the fourth resistor is coupled with the second end of the first resistor, and the other end of the fourth resistor is coupled with the a second input end of the differential amplifier; one end of the fifth resistor is grounded, and the other end of the fifth resistor is coupled with the first input end of the differential amplifier; one end of the sixth resistor is coupled with the second input end of the differential amplifier, and the other end of the sixth resistor is coupled with an output end of the differential amplifier. ### Claim 14 (depends on 13) The display device according to claim 13, wherein in the differential amplifier circuit, a ratio of a resistance of the fifth resistor to a resistance of the third resistor equals to a ratio of a resistance of the sixth resistor to a resistance of the fourth resistor. ### Claim 15 (depends on 12) The display device according to claim 12, wherein the conversion unit is configured to multiply a difference value between a reference voltage of an output voltage of the differential amplifier and the output voltage of the differential amplifier by a preset coefficient, to obtain a value of the compensation voltage signal. ### Claim 16 (depends on 11) The display device according to claim 11, wherein the compensation module comprises a first resistor, a second resistor, a differential amplifier circuit and a conversion unit, wherein a first end of the first resistor receives the third voltage signal and a second end of the first resistor is grounded via the second resistor, two input ends of the differential amplifier circuit are coupled with two ends of the first resistor respectively, and an output end of the differential amplifier circuit is coupled with the conversion unit. ### Claim 17 (depends on 11) The display device according to claim 11, wherein the panel drive device further comprises a timing controller configured to receive a first control signal from the interface module, receive the fourth voltage signal from the voltage conversion module and output a second control signal. ### Claim 18 (depends on 17) The display device according to claim 17, wherein the panel drive device further comprises a gate drive circuit configured to receive the second control signal from the timing controller and output a gate drive signal. ### Claim 19 (depends on 11) The display device according to claim 11, wherein the panel drive device further comprises a gamma circuit configured to receive the fourth voltage signal from the voltage conversion module, receive a data signal from the interface module and output a gamma voltage signal. ### Claim 20 (depends on 19) The display device according to claim 19, wherein the panel drive device further comprises a source drive circuit configured to receive the fourth voltage signal from the voltage conversion module, receive the gamma voltage signal from the gamma circuit and output a source drive signal.