US 9,812,050 B2
Display driving device compensating for offset voltage and method thereof
Byong Deok Choi, Seoul (KR); and Don Ku Lee, Seoul (KR)
Assigned to SK HYNIX INC., Icheon (KR); and INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY, Seoul (KR)
Filed by SK HYNIX INC., Icheon (KR); and INDUSTRY-UNIVERSITY COOPERATION FOUNDATION HANYANG UNIVERSITY, Seoul (KR)
Filed on Jul. 1, 2014, as Appl. No. 14/321,708.
Claims priority of application No. 10-2013-0162492 (KR), filed on Dec. 24, 2013.
Prior Publication US 2015/0179125 A1, Jun. 25, 2015
Int. Cl. G09G 3/36 (2006.01); G09G 3/20 (2006.01)
CPC G09G 3/20 (2013.01) [G09G 2310/027 (2013.01); G09G 2320/0233 (2013.01); G09G 2320/0285 (2013.01)] 13 Claims
OG exemplary drawing
 
13. A display driving device for driving a display panel, the display driving device comprising:
a data driver including a plurality of output drivers, the output drivers configured to output driving signals for driving the display panel;
an offset adjusting circuit configured to subtract offset voltages generated in the output drivers from an input image signal to generate a corrected image signal, the offset adjusting circuit comprising:
an offset detector coupled to the output drivers and configured to detect the offset voltages of the output drivers; and
an offset corrector coupled to the offset detector and the timing controller and configured to subtract the offset voltages from the input image signal to generate the corrected image signal; and
a timing controller configured to receive the input image signal from an external node and transmit the input image signal to the offset corrector, the timing controller configured to further receive the corrected image signal from the offset corrector and transmit the corrected image signal to the data driver so that the data driver outputs the driving signals based on the corrected image signal.