US 12,452,973 B2
Display device
Kyoungryul Lim, Seoul (KR)
Assigned to LG ELECTRONICS INC., Seoul (KR)
Appl. No. 18/281,482
Filed by LG ELECTRONICS INC., Seoul (KR)
PCT Filed May 4, 2022, PCT No. PCT/KR2022/006440
§ 371(c)(1), (2) Date Sep. 11, 2023,
PCT Pub. No. WO2022/250321, PCT Pub. Date Dec. 1, 2022.
Claims priority of application No. 10-2021-0066520 (KR), filed on May 24, 2021.
Prior Publication US 2024/0172344 A1, May 23, 2024
Int. Cl. H05B 45/325 (2020.01); G08B 5/36 (2006.01); H04N 21/422 (2011.01); H05B 45/20 (2020.01)
CPC H05B 45/325 (2020.01) [H04N 21/42203 (2013.01); H05B 45/20 (2020.01); G08B 5/36 (2013.01)] 14 Claims
OG exemplary drawing
 
1. A display device comprising:
a lighting unit including a plurality of light emitting diode (LED) modules;
a pulse width modulation signal generator configured to output an alternating-current signal for controlling an on or off state of each of the plurality of LED modules;
a resistor-capacitor (RC) filter configured to convert the alternating-current signal into a rectification signal;
an LED circuit configured to turn on or off each of the plurality of LED modules according to a voltage intensity of the rectification signal; and
a processor configured to control the on or off state of each of the plurality of LED modules by adjusting a duty ratio of the alternating-current signal output from the pulse width modulation signal generator based on operation state information of the display device,
wherein the processor is configured to obtain power state information and voice recognition operation state information of the display device and control the on or off state of each of the plurality of LED modules based on the power state information and voice recognition operation state information.