Lg Electronics Inc.

Kyoungryul Lim

Sunho Hwang

Ingyu Lee

The present disclosure provides a display device comprising: a lighting unit including a plurality of LED modules; a pulse width modulation signal generator configured to output an alternating-current signal for controlling on or off of each of the plurality of LED modules; an 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 adjust the duty ratio of the alternating-current signal output from the pulse width modulation signal generator on the basis of the operation state information of the display device to control on or off of each of the plurality of LED modules.

Display device

A display device may include a micro control unit configured to receive an IR signal and to operate in a low power mode or an active power mode, and may determine whether a wakeup signal is detected from the IR signal while the micro control unit operates in the low power mode and switch a power mode of the micro control unit from the low power mode to the active power mode when the wakeup signal is detected.

Display device and system

A detachable display device includes a main box including a microphone and a main processor, and a display including an amplifier configured to amplify an audio signal received from the main processor and a speaker configured to convert the amplified audio signal into a sound and output the sound. The main processor is configured to perform acoustic echo cancellation (AEC) on the audio signal based on the audio signal output by the main processor, equalization information, and volume information.

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Seoul, South Korea

Kyoungryul Lim