US 11,915,632 B2
Signal processing device capable of reducing breakdown phenomenon in case of power off or power down, and image display device including the same
Taksu Moon, Seoul (KR); and Youngjae Jung, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 17/904,369
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed Feb. 18, 2020, PCT No. PCT/KR2020/002277
§ 371(c)(1), (2) Date Aug. 16, 2022,
PCT Pub. No. WO2021/167113, PCT Pub. Date Aug. 26, 2021.
Prior Publication US 2023/0067949 A1, Mar. 2, 2023
Int. Cl. G09G 3/20 (2006.01); H03K 19/20 (2006.01)
CPC G09G 3/20 (2013.01) [H03K 19/20 (2013.01); G09G 2310/0259 (2013.01); G09G 2310/0289 (2013.01); G09G 2330/00 (2013.01); G09G 2330/027 (2013.01); G09G 2330/04 (2013.01); G09G 2360/10 (2013.01)] 17 Claims
OG exemplary drawing
 
1. A signal processing device for processing input signals received from an Ethernet terminal, the signal processing device comprising:
a first logic circuit configured to process a first voltage range among voltage levels of input signal;
a second logic circuit configured to process a second voltage range higher than the first voltage range among the voltage levels of the input signals; and
a protection control circuit disposed between the first logic circuit and the second logic circuit and including a protection switch and a protection controller for controlling the protection switch,
wherein the protection switch is turned on when the protection controller is turned off or powered down, and
wherein the protection switch is turned on when operation power for operating the second logic circuit is applied and operation power is not applied to the protection controller while operation power for operating the protection switch is applied.