# US 2017/0287429 A1 · Display driving circuit and display device comprising the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 2017/0287429 A1 - Document ID: US20170287429A1 - Status: Published application - Kind: A1 - Application number: 15/468,334 - Filed: 2017-03-24 - Published: 2017-10-05 - Earliest claimed: 2016-03-29 - Assignees: Samsung Electronics Co., Ltd. - Applicants: Samsung Electronics Co., Ltd. - Inventors: Ki-ho KONG; Hong-keun Yune; Jee-hwal Kim; Jin-hong Hwang; Seung-hyun An; Yang-hyo Kim - Web page: https://patentgrep.com/patent/US20170287429A1 ## CPC - G09G 3/3685: {Details of drivers for data electrodes} - G09G 3/3607: {for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels (display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127)} - G09G 3/3674: {Details of drivers for scan electrodes} - G09G 3/3688: {suitable for active matrices only} - G09G 2310/027: Details of drivers for data electrodes, the drivers handling digital grey scale data, e.g. use of D/A converters - G09G 2310/0275: Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current - G09G 2310/0286: Details of a shift registers arranged for use in a driving circuit - G09G 2310/0291: Details of output amplifiers or buffers arranged for use in a driving circuit - G09G 2310/08: Details of timing specific for flat panels, other than clock recovery - G09G 2330/021: Power management, e.g. power saving - 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 display driving circuit and a display device including the display driving circuit are disclosed. The display driving circuit includes: a data driver including a first channel amplifier operating based on first pixel data and a second channel amplifier operating based on second pixel data and configured to drive first and second pixels of a display panel based on the first pixel data and the second pixel data of a first line; and a data comparator configured to compare the first pixel data with the second pixel data and determine operation states of the first channel amplifier and the second channel amplifier on a comparison result, before a first horizontal period in which the first pixel and the second pixel are driven. ## Claims ### Claim 1 A display driving circuit comprising: a data driver including, a first channel amplifier configured to drive a first data line connected to a first group of pixels of a display panel, the first group of pixels includes a first pixel associated with a first gate line of the display panel, and a second channel amplifier configured to drive a second data line connected to a second group of pixels of the display panel, the second group of pixels includes a second pixel associated with the first gate line; and a data comparator configured to compare the first pixel data corresponding to the first pixel with the second pixel data corresponding to the second pixel, and configured to determine operation states of the first channel amplifier and the second channel amplifier based on a comparison result, before a first horizontal period in which the first pixel and the second pixel are driven. ### Claim 2 (depends on 1) The display driving circuit of claim 1, wherein, the data comparator is configured to determine whether to turn off or turn on the second channel amplifier based on the comparison result and provide a enable signal or disable signal to second channel amplifier, and the first channel amplifier is configured to drive the first pixel and the second pixel, if the second channel amplifier is turned off ### Claim 3 (depends on 1) The display driving circuit of claim 1, wherein, the second channel amplifier is turned on before the first horizontal period, if the second channel amplifier is turned off before the first horizontal period and the second channel amplifier is determined to be turned on during the first horizontal period. ### Claim 4 (depends on 3) The display driving circuit of claim 3, wherein the data comparator is configured to turn on the second channel amplifier by proving a enable signal to the second channel amplifier at least a time period before the first horizontal period begins, the time period being set based on a stabilization time of the second channel amplifier. ### Claim 5 (depends on 1) The display driving circuit of claim 1, wherein the data comparator is configured to determine that the first channel amplifier is turn on and the second channel amplifier is turned off during the first horizontal period, if the first pixel data and the second pixel data are identical to each other. ### Claim 6 (depends on 1) The display driving circuit of claim 1, wherein the first group of pixels further includes a third pixel associated with a second gate line of the display panel and the second group of pixels further includes a fourth pixel associated with the second gate line, and the data comparator is configured to compare a third pixel data corresponding to third pixel and fourth pixel data corresponding to the fourth pixel, to compare the first pixel data and the third pixel data, and to compare the second pixel data and the fourth pixel data during the first horizontal period and to configured determine the operation states of the first channel amplifier and the second channel amplifier for a second horizontal period in which the third pixel and the fourth pixel are driven based on comparison results, before the second horizontal period. ### Claim 7 (depends on 6) The display driving circuit of claim 6, wherein the data comparator is configured to determine that the first channel amplifier is turn on and the second channel amplifier is turn off during the second horizontal period, if the third pixel data and the fourth pixel data are identical to each other, and a first data difference of the first pixel data and the third pixel data and a second data difference of the second pixel data and the fourth pixel data are respectively less than a threshold value. ### Claim 8 (depends on 6) The display driving circuit of claim 6, wherein the data driver further comprises: a third channel amplifier configured to drive a third data line connected to a third group of pixels of the display panel, the third group of pixels includes a fifth pixel associated with the first gate line and a sixth pixel associated with the second gate line, wherein the data comparator is configured to further compare the third pixel data, the fourth pixel data and a sixth pixel data corresponding to the sixth pixel and to compare a fifth pixel data corresponding to the fifth pixel and the sixth pixel data, and configured to determine operation states of the first channel amplifier, the second channel amplifier and the third channel amplifier for the second horizontal period based on comparison results before the second horizontal period. ### Claim 9 (depends on 8) The display driving circuit of claim 8, wherein the data comparator is configured to determine that the first channel amplifier and the third channel amplifier are turn on and the second channel amplifier is turn off during the second horizontal period, if the third pixel data and the fourth pixel data are identical to each other, the fourth pixel data is different from the sixth pixel data, and the first data difference and the second data difference are respectively less than a first threshold value. ### Claim 10 (depends on 9) The display driving circuit of claim 9, wherein the data comparator is configured to determine that the first channel amplifier is turn on, and the second channel amplifier and the third channel amplifier are turn off, if the third pixel data, the fourth pixel data and the sixth pixel data are identical to each other, and the first data difference, the second data difference, and a third data difference of the fifth pixel data and the sixth pixel data are respectively less than a second threshold value. ### Claim 11 The display driving circuit 10, wherein the first threshold value is greater than the second threshold value. ### Claim 12 A display device comprising: a display panel including a plurality of pixels arranged in a matrix form; a data driver including, a first channel amplifier configured to drive a first data line connected to first pixels of the display panel based on first pixel data associated with a plurality of gate lines of the display panel, and a second channel amplifier configured to drive a second data line connected to second pixels of the display panel based on second pixel data associated with the plurality of gate lines; and a timing controller configured to compare first pixel data with second pixel data associated with a (k+1)th gate line (k is a positive integer) among the plurality of gate lines during a kth horizontal period, and to determine whether to turn on or turn off the second channel amplifier for a (k+1)th horizontal period based on a comparison result, before the (k+1)th horizontal period starts. ### Claim 13 (depends on 12) The display device of claim 12, wherein, the timing controller is configured to turn on the second channel amplifier before the (k+1)th horizontal period starts, if the second channel amplifier is off during the kth horizontal period and is to be turned on during the (k+1)th horizontal period. ### Claim 14 (depends on 12) The display device of claim 12, wherein the timing controller is configured to turn off the second channel amplifier during the (k+1)th horizontal period, if the first pixel data and the second pixel data of the (k+1)th line are identical to each other, and a data. transition amount of the first pixel data between the (k+1)th gate line and a kth gate line and a data transition amount of the second pixel data between the (k+1)th gate line and a kth gate line are respectively less than a threshold value. ### Claim 15 (depends on 12) The display device of claim 12, wherein the data driver further comprises: a shift register configured to sequentially receive a plurality of control signals for controlling operation states of the first channel amplifier and the second channel amplifier from the timing controller, and to provide the plurality of control signals to the first channel amplifier and the second channel amplifier. ### Claim 16 A driving circuit configured to drive a display panel during at least a first horizontal period and a second horizontal period, the driving circuit comprising: a controller configured to determine which ones of a first channel amplifier and a second channel amplifier to enable to amplify pixel data associated with a second gate line of the display panel during the second horizontal period based on the pixel data associated with a first gate line and the second gate line during the first horizontal period such that ones of the first channel amplifier and the second channel amplifier that are disabled during the first horizontal period and determined to be enabled during the second horizontal period are re-enabled prior to a start of the second horizontal period. ### Claim 17 (depends on 16) The driving circuit of claim 16, wherein the controller is configured to, determine, prior to the start of the second horizontal period, that an operation state of the second channel amplifier is reactivated during the second horizontal period, if the pixel data associated with the first gate line and the second gate line indicates that the second channel amplifier is off during the first horizontal period and on during the second horizontal period, and enable the second channel amplifier for the second horizontal period at least a stabilization time period prior to the start of the second horizontal period, if the controller determines that the operation state of the second channel amplifier is reactivated during the second horizontal period. ### Claim 18 (depends on 17) The driving circuit of claim 17, wherein the controller is configured to, determine, prior to the start of the second horizontal period, that the operation state of the second channel amplifier is deactivated during the second horizontal period, if the pixel data associated with the first gate line and the second gate line indicates that the second channel amplifier is on during the first horizontal period and off during the second horizontal period, and disable the second channel amplifier for the second horizontal period after the start of the second horizontal period, if the controller determines that the operation state of the second channel amplifier is deactivated during the second horizontal period. ### Claim 19 (depends on 16) The driving circuit of claim 16, wherein the pixel data transmitted to the first channel amplifier is first pixel data, and the pixel data transmitted to the second channel amplifier is second pixel data, the controller is further configured to, determine whether a first condition is true, the first condition being true if a value of the first pixel data associated with the second gate line is same as a value of the second pixel data associated with the second gate line, and determine whether a second condition is true, the second condition being true if a difference in the value of the first pixel data between the first horizontal period and the second horizontal period is less than a threshold, determine whether a third condition is true, the third condition being true if a difference in the value of the second pixel data between the first horizontal period and the second horizontal period is less than the threshold, and disable one of the first channel amplifier and the second channel amplifier for the second horizontal period, if the controller determines that the first condition, the second condition, and the third condition are true. ### Claim 20 (depends on 16) The driving circuit of claim 16, wherein the controller is configured to enable the second channel amplifier a time period before the second horizontal period begins, if the second channel amplifier is disabled during the first horizontal period and the controller determines that an operation state of the second channel amplifier is re-activated during the second horizontal period, the time period being set based on a stabilization time period associated with the second channel amplifier.