US 12,148,402 B2
Panel drive circuit
Makoto Hatakenaka, Tokyo (JP); Takashi Sakamoto, Tokyo (JP); Mitsuo Hagiwara, Tokyo (JP); Norimasa Senda, Tokyo (JP); Yoshihide Minegishi, Tokyo (JP); and Hiroshi Murase, Tokyo (JP)
Assigned to IIX INC., Tokyo (JP)
Appl. No. 18/279,152
Filed by IIX INC., Tokyo (JP)
PCT Filed Mar. 10, 2021, PCT No. PCT/JP2021/009496
§ 371(c)(1), (2) Date Aug. 28, 2023,
PCT Pub. No. WO2022/190247, PCT Pub. Date Sep. 15, 2022.
Prior Publication US 2024/0135894 A1, Apr. 25, 2024
Prior Publication US 2024/0233669 A9, Jul. 11, 2024
Int. Cl. G09G 3/36 (2006.01)
CPC G09G 3/3611 (2013.01) [G09G 2320/0233 (2013.01); G09G 2320/0626 (2013.01); G09G 2320/0673 (2013.01); G09G 2360/16 (2013.01)] 4 Claims
OG exemplary drawing
 
1. A panel drive circuit comprising:
an image signal input unit to which an image signal is input;
a gamma correction means configured to correct the image signal input to the image signal input unit or a first processing signal generated by first processing being performed on the image signal input to the image signal input unit, such that a gamma correction signal thus generated has predetermined gamma characteristics;
an unevenness correction means configured to correct the gamma correction signal generated through the correction by the gamma correction means or a second processing signal generated by second processing being performed on the gamma correction signal generated through the correction by the gamma correction means, based on correction data for reducing unevenness of a display panel; and
a D/A (digital-to-analog) conversion means having a variable output voltage range and configured to perform digital-to-analog conversion on an unevenness correction signal generated through the correction by the unevenness correction means and output a signal thus generated to the display panel,
wherein the unevenness correction means changes a correction method according to the output voltage range of the D/A conversion means.