US 12,136,382 B1
Method of controlling driving circuit of led display device and related timing controller and led display device thereof
Tung-Ying Wu, Tainan (TW)
Assigned to HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed by HIMAX TECHNOLOGIES LIMITED, Tainan (TW)
Filed on Apr. 18, 2023, as Appl. No. 18/136,317.
Int. Cl. G09G 3/20 (2006.01); G09G 3/32 (2016.01)
CPC G09G 3/32 (2013.01) [G09G 2310/027 (2013.01); G09G 2310/08 (2013.01); G09G 2320/0633 (2013.01); G09G 2330/028 (2013.01); G09G 2340/10 (2013.01)] 15 Claims
OG exemplary drawing
 
1. A timing controller for controlling a plurality of driving circuits of a light-emitting diode (LED) display device, comprising:
a voltage level conversion circuit configured to determine a plurality of voltage level settings with respect to a plurality of image regions of an input image, respectively, comprising:
a first circuitry configured to determine a plurality of maximum luminance values with respect to the plurality of image regions of the input image, respectively, wherein each of the maximum luminance values is a regional maximum luminance value and corresponds to a specific one of the image regions of the input image; and
a second circuitry configured to determine the plurality of voltage level settings according to the plurality of maximum luminance values, respectively, wherein the second circuitry is configure to determine the plurality of voltage level settings according to the plurality of maximum luminance values before a digital gamma correction process is performed with respect to the input image: each of the voltage level settings corresponds to a predetermined luminance range and a predetermined driving voltage level: when determining a voltage level setting for an image region, the second circuitry is configured to select the voltage level setting corresponding to a lowest driving voltage level whose predetermined luminance range is sufficient to cover a regional maximum luminance value of the image region; and
a setting circuit configured to respectively set the plurality of driving circuits of the LED display device according to the plurality of voltage level settings, wherein the setting circuit is configured to set each of the plurality of driving circuits to utilize a drive voltage at a specific level that is indicated by a corresponding one of the voltage level settings, to respectively drive LED units of the LED display device.