Display device, control method thereof, and IC chip

Patent metadata

Field	Value
Publication number	US-12531005-B2
Application number	US-202318094741-A
Country	US
Kind code	B2
Filing date	Jan 9, 2023
Priority date	Jul 23, 2020
Publication date	Jan 20, 2026
Grant date	Jan 20, 2026

Abstract

A display device includes a power generation part including a converter and configured to supply power to a display panel and a main circuit that are in the display device; and an integrated circuit (IC) chip configured to provide a feedback signal to the power generation part based on a voltage outputted from the power generation part being equal to or higher than a first threshold voltage, wherein the power generation part is further configured to stop a switching operation of the converter based on the feedback signal.

First claim

What is claimed is:

1 . A display device comprising:
a power generation part comprising a converter and configured to supply power to a display panel and a main circuit in the display device; and an integrated circuit (IC) chip configured to receive a first voltage from the power generation part and provide a feedback signal to the power generation part, the feedback signal identifying the first voltage being equal to or higher than a first threshold voltage, wherein the power generation part is further configured to stop a switching operation of the converter based on the feedback signal, wherein the power generation part is further configured to stop supplying power to the display panel and the main circuit when the power generation part stops the switching operation of the converter, wherein the IC chip is further configured to detect a voltage of a predetermined node of the main circuit, and based on an abnormality being occurred in the voltage of the predetermined node, provide the feedback signal to the power generation part, wherein the IC chip is configured to receive a pulse width modulation (PWM) dimming signal, and wherein, based on a period that a low value of the PWM dimming signal is maintained exceeding a threshold time, the IC chip is configured to provide the feedback signal to the power generation part, and is configured to transmit, to a circuit connected to the power generation part, a first control signal for changing a state of the circuit connected to the power generation part to an idle state.

2 . The display device of claim 1 , further comprising:
a standby circuit that is connected to an output end of the power generation part, and, based on a standby mode instruction being received by the standby circuit, that reduces a voltage value of a voltage outputted from the power generation part.

3 . The display device of claim 2 , wherein:
based on the voltage value of the voltage becoming lower than a second threshold voltage, the IC chip is configured to transmit to the circuit connected to the power generation part, the first control signal for changing the state of the circuit connected to the power generation part to the idle state, and the second threshold voltage is lower than the first threshold voltage.

4 . The display device of claim 3 , wherein the IC chip is configured to transmit, based on the voltage value of the voltage outputted from the power generation part becoming higher than a third threshold voltage that is higher than the second threshold voltage while the circuit connected to the power generation part is in the idle state, a second control signal for waking up the circuit connected to the power generation part to the circuit connected to the power generation part, and
wherein the third threshold voltage is lower than the first threshold voltage.

5 . The display device of claim 3 , wherein the IC chip is configured to transmit, based on an idle enable signal being received while the circuit connected to the power generation part is in the idle state, a second control signal for waking up the circuit connected to the power generation part to the circuit connected to the power generation part.

6 . The display device of claim 1 , wherein the IC chip is configured to transmit, based on receiving the PWM dimming signal after providing the feedback signal, a second control signal for waking up the circuit connected to the power generation part to the circuit connected to the power generation part.

7 . The display device of claim 1 , wherein the IC chip comprises:
a comparator configured to compare a voltage outputted from the power generation part and the first threshold voltage; and a transistor configured to output the feedback signal to the power generation part based on an output value of the comparator.

8 . A method of a display device, the method comprising:
receiving, by an integrated circuit (IC) chip, a first voltage outputted from a power generation part including a converter and supplying power to a display panel and a main circuit in the display device; and providing a feedback signal to the power generation part by the IC chip, the feedback signal identifying the first voltage being equal to or higher than a first threshold voltage; stopping a switching operation of the converter based on the feedback signal; stopping supplying power to the display panel and the main circuit when the switching operation of the converter being stopped; detecting a voltage of a predetermined node of the main circuit; and based on an abnormality being occurred in the voltage of the predetermined node, providing the feedback signal to the power generation part, wherein the providing the feedback signal comprises:
receiving a pulse width modulation (PWM) dimming signal by the IC chip; and
based on a period that a low value of the PWM dimming signal is maintained exceeding a threshold time, providing the feedback signal to the power generation part by the IC chip, and transmitting to a circuit connected to the power generation part, a first control signal for changing a state of the circuit connected to the power generation part to an idle state.

9 . The method of claim 8 , further comprising, based on a standby mode instruction, reducing a voltage value of a voltage outputted from the power generation part.

10 . The method of claim 9 , further comprising:
based on the voltage value of the voltage outputted from the power generation part becoming lower than a second threshold voltage, transmitting to the circuit connected to the power generation part, the first control signal for changing the state of the circuit connected to the power generation part to the idle state, wherein the second threshold voltage is lower than the first threshold voltage.

11 . The method of claim 10 , further comprising:
based on the voltage value of the voltage outputted from the power generation part becoming higher than a third threshold voltage higher than the second threshold voltage while the circuit connected to the power generation part is in the idle state, transmitting a second control signal for waking up the circuit connected to the power generation part to the circuit connected to the power generation part by the IC chip, wherein the third threshold voltage is lower than the first threshold voltage.

12 . The method of claim 10 , further comprising:
based on an idle enable signal being received while the circuit connected to the power generation part is in the idle state, transmitting a second control signal for waking up the circuit connected to the power generation part to the circuit connected to the power generation part by the IC chip.

13 . The method of claim 8 , further comprising:
transmitting by the IC chip, based on receiving the PWM dimming signal after providing the feedback signal, a second control signal for waking up the circuit connected to the power generation part to the circuit connected to the power generation part.

14 . The method of claim 8 , further comprising:
comparing, by a comparator of the IC chip, a voltage outputted from the power generation part and the first threshold voltage; and outputting, by a transistor of the IC chip, the feedback signal to the power generation part based on an output value of the comparator.

Assignees

• Samsung Electronics Co Ltd

Inventors

• Lee Jiwon
• Joo Sungyong
• Won Junhyun

Classifications

• G09G2330/04

  Display protection · CPC title

• G09G2330/021

  Power management, e.g. power saving · CPC title

• G09G3/2092 Primary

  Details of a display terminals using a flat panel, the details relating to the control arrangement of the display terminal and to the interfaces thereto (suitable for both CRT and flat panel G09G5/003; specific for a CRT G09G1/165) · CPC title