US 11,721,259 B2
Display driving device and display driving method for reducing power using energy harvesting device
Jong Suk Lee, Daejeon (KR); and Young Bok Kim, Daejeon (KR)
Assigned to LX SEMICON CO., LTD., Daejeon (KR)
Filed by LX SEMICON CO., LTD., Daejeon (KR)
Filed on Nov. 30, 2021, as Appl. No. 17/537,746.
Claims priority of application No. 10-2020-0165519 (KR), filed on Dec. 1, 2020.
Prior Publication US 2022/0172660 A1, Jun. 2, 2022
Int. Cl. G09G 3/20 (2006.01); G09G 3/36 (2006.01); G09G 3/3275 (2016.01)
CPC G09G 3/20 (2013.01) [G09G 3/3275 (2013.01); G09G 3/3648 (2013.01); G09G 2300/0408 (2013.01); G09G 2310/08 (2013.01); G09G 2320/041 (2013.01); G09G 2330/00 (2013.01); G09G 2330/02 (2013.01); G09G 2330/021 (2013.01)] 11 Claims
OG exemplary drawing
 
1. A display driving device configured to drive a display device for displaying an image, the display driving device comprising:
a source driver integrated circuit (IC) configured to convert image data into a source signal; and
an energy harvesting device configured to convert thermal energy into electrical energy and supply the electrical energy to the source driver IC,
wherein the energy harvesting device includes:
a thermal energy converter configured to convert thermal energy generated in the source driver IC to output an energy harvesting current; and
an energy storage directly connected to the thermal energy converter, and configured to receive the energy harvesting current, store power, and output a first auxiliary voltage that is a voltage generated due to the stored power when the first auxiliary voltage that is a voltage generated due to the stored power is greater than or equal to a usable voltage,
wherein the thermal energy converter and the energy storage are located on the source driver IC,
wherein the thermal energy converter and the energy storage are integrally configured with the source driver IC, and
wherein the thermal energy converter includes a plurality of thermoelectric modules configured to convert the absorbed thermal energy into the energy harvesting current, and a plurality of thermoelectric modules in contact with the source driver IC to absorb the thermal energy generated in the source driver IC.