# US 8,542,183 B2 · Display device, signal line driver, and data transfer method > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 8,542,183 B2 - Document ID: US8542183B2 - Status: Granted - Kind: B2 - Application number: 13/067,789 - Filed: 2011-06-27 - Published: 2012-02-16 - Granted: 2013-09-24 - Earliest claimed: 2010-08-16 - Assignees: Renesas Electronics Corporation - Applicants: Takashi Nose; Yoshihiko Hori - Inventors: Takashi Nose; Yoshihiko Hori - Web page: https://patentgrep.com/patent/US8542183B2 ## CPC - G09G 3/3688: {suitable for active matrices only} - G09G 3/3648: {using an active matrix (G09G3/367 - G09G3/3696 take precedence)} - G09G 3/3677: {suitable for active matrices only} - G09G 2300/0426: Layout of electrodes and connections - G09G 2300/043: Compensation electrodes or other additional electrodes in matrix displays related to distortions or compensation signals, e.g. for modifying TFT threshold voltage in column driver - G09G 2310/0278: Details of driving circuits arranged to drive both scan and data electrodes - G09G 2310/0281: Arrangement of scan or data electrode driver circuits at the periphery of a panel not inherent to a split matrix structure - G09G 2310/0283: Arrangement of drivers for different directions of scanning - 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 2370/08: Details of image data interface between the display device controller and the data line driver circuit - 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 liquid crystal display device includes a timing controller, a liquid crystal display panel, multiple data drivers, and gate drivers. The timing controller supplies control data to specified drivers among the data drivers. The specified drivers generate gate driver control signals to control gate drivers in response to the control data, and supply gate driver control signals to the gate drivers. ## Claims ### Claim 1 A display device, comprising: a display panel; a timing controller; a plurality of signal line drivers to drive display panel signal lines; and a seaming line driver to drive scanning lines on the display panel, wherein the timing controller supplies control data to a specified driver among the signal line drivers, and wherein the specified driver generates scanning line driver control signals to control the scanning line drivers in a response to the control data, and supplies scanning line driver control signals to the scanning line driver, wherein the specified driver includes: a drive circuit to drive the signal lines of the display panel; a control signal generator circuit to generate signal line driver control signals to control the drive circuit from the control data, and to generate the scanning line driver control signals; output pins coupled to the scanning line driver; and a selector to select either the signal line driver control signal or the scanning line driver control signals, wherein the selector is configured to output a selected one of the signal line driver control signal and the scanning line driver control signals from the output pin, and wherein, during a test operation, the selector selects the signal line driver control signal, from the signal line driver control signal and the scanning line driver control signals, and outputs the signal line driver control signal from the output pins. ### Claim 2 (depends on 1) The display device according to claim 1, wherein the data transfer line couples the timing controller and the specified driver, and wherein the timing controller supplies both control data and video data corresponding to images displayed on the display panel to the specified driver by way of the video transfer line. ### Claim 3 (depends on 2) The display device according to claim 2, wherein the timing controller generates data transfer signals corresponding to transfer data containing the control data and the video data in synchronization with clock signals, and sends the data transfer signals to the specified driver by way of the data transfer line, and wherein the specified driver regenerates the clock recovery signals from the data transfer signals and obtains the control data and the video data by sampling the data transfer signals in a response to the clock recovery signals. ### Claim 4 (depends on 3) The display device according to claim 3, wherein the specified driver comprises a nearest driver coupled to the scanning line driver among the signal line drivers. ### Claim 5 (depends on 2) The display device according to claim 2, wherein the specified driver comprises a nearest driver coupled to the scanning line driver among the signal line drivers. ### Claim 6 (depends on 1) The display device according to claim 1, wherein the plural signal line drivers include a non-coupled driver that is not connected to the scanning line driver, and wherein the non-coupled driver and the specified driver possess identical structures. ### Claim 7 (depends on 6) The display device according to claim 6, wherein the specified driver comprises a nearest driver coupled to the scanning line driver among the signal line drivers. ### Claim 8 (depends on 1) The display device according to claim 1, wherein the specified driver comprises a nearest driver coupled to the scanning line driver among the signal line drivers. ### Claim 9 (depends on 1) The display device according to claim 1, wherein the specified driver comprises a nearest driver coupled to the scanning line driver among the signal line drivers. ### Claim 10 (depends on 1) The display device according to claim 1, wherein, during a normal operation, the selector selects the scanning line driver control signals, from the signal line driver control signal or the scanning line driver control signals, and outputs the scanning line driver control signals from the output pins. ### Claim 11 A signal line driver, comprising: a receiver to receive transfer data including video data and control data from a timing controller; a drive circuit to drive display panel signal lines in a response to the video data; and a control signal generator circuit to generate control signals to control the scanning line driver that drives the scanning lines in the display panel in a response to the control data; an output pin connected to the scanning line driver; and a selector, wherein the control signal generator circuit generates signal line driver control signals to control the drive circuit from the control data, wherein the selector selects control signals from either the signal line driver control signals or the scanning line driver control signals, and outputs a selected one of the signal line driver control signal and the scanning line driver control signals from the output pin, and wherein, during a test operation, the selector selects the signal line driver control signal, from the signal line driver control signal and the scanning line driver control signals, and outputs the signal line driver control signal from the output pins. ### Claim 12 (depends on 11) The signal line driver according to claim 11, wherein, during a normal operation, the selector selects the scanning line driver control signals, from the signal line driver control signal or the scanning line driver control signals, and outputs the scanning line driver control signals from the output pins.