US 9,812,054 B2
Display driver and display apparatus using sub-pixel rendering method
Hsueh-Yen Yang, Taoyuan (TW); Kai-Min Yang, Kaohsiung (TW); Chin-Yuan Tu, Taoyuan (TW); and Feng-Ting Pai, Hsinchu (TW)
Assigned to Novatek Microelectronics Corp., Hsinchu (TW)
Filed by Novatek Microelectronics Corp., Hsinchu (TW)
Filed on Jul. 1, 2015, as Appl. No. 14/788,805.
Claims priority of provisional application 62/087,815, filed on Dec. 5, 2014.
Claims priority of application No. 104104731 (TW), filed on Feb. 12, 2015.
Prior Publication US 2016/0163286 A1, Jun. 9, 2016
Int. Cl. G09G 3/20 (2006.01)
CPC G09G 3/2011 (2013.01) [G09G 2300/0439 (2013.01); G09G 2300/0452 (2013.01); G09G 2330/021 (2013.01); G09G 2340/0457 (2013.01)] 26 Claims
OG exemplary drawing
 
1. A display driver, configured to drive a display panel, wherein the display panel is configured to display an image frame in a first display mode or a second display mode, and the display driver comprises:
a first display driving channel, driving the display panel to display the image frame by using a sub-pixel rendering method in the first display mode; and
a second display driving channel, driving the display panel to display the image frame by using the sub-pixel rendering method in the second display mode,
wherein the display panel comprises a sub-pixel repeating unit, the sub-pixel repeating unit is repeatedly arranged to form the display panel, the sub-pixel repeating unit comprises a plurality of pixel units, and each of the pixel units comprises one to two sub-pixels,
wherein in the second display mode, the second display driving channel drives the sub-pixels on the display panel to display corresponding grayscales by using a plurality of gamma voltages, and a voltage value of at least one gamma voltage among the gamma voltages is determined according to at least one ratio relationship, wherein the at least one ratio relationship is determined according to at least one of quantity ratios occupied by at least one of the sub-pixels in the sub-pixel repeating unit.