US 2019/0295451 A1Published application

Display device and shutdown control method thereof

AssigneeAu Optronics Corporation

InventorsChun-Kuei Wen, Hung-Min Shih

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Abstract

A display device and a shutdown control method thereof are provided. In the display device, a display panel has multiple pixels. A power supply circuit generates a power supply voltage, a gate high voltage and a common voltage according to an input power. A gate driver generates gate scan signals, and a source driver provides source driving signals to drive the display panel. A shutdown detection circuit detects a variation state of voltages values of the power supply voltage, the input voltage and the gate high voltage, and starts a shutdown process when the variation state is a decreasing state. In the shutdown process, the source driver makes the source driving signals to be equal to a reference ground voltage, the gate driver generates the gate scan signals with a high voltage pulse, and the power supply circuit makes the common voltage to be equal to the reference ground voltage.

Claims16

Dependent claims

A display device, comprising:

a display panel, having a plurality of pixels, and receiving a common voltage;
a power supply circuit, receiving an input power, and generating a power supply voltage, a gate high voltage and the common voltage according to the input power;
a gate driver, coupled to the display panel, and receiving the gate high voltage to generate a plurality of gate scan signals to drive the display panel;
a source driver, coupled to the display panel, and providing a plurality of source driving signals to drive the display panel;
and
a shutdown detection circuit, coupled to the power supply circuit, the gate driver and the source driver, and configured to detect a variation state of voltage values of the power supply voltage, the input power and the gate high voltage, and starting a shutdown process when the voltage values of the power supply voltage, the input power and the gate high voltage are all in a decreasing state,
wherein in the shutdown process, the source driver makes the source driving signals to be equal to a reference ground voltage, the gate driver generates the gate scan signals with a high voltage pulse, and the power supply circuit makes the common voltage to be equal to the reference ground voltage.

4 more elements

A shutdown control method of a display device, comprising:

detecting a variation state of voltage values of a power supply voltage, an input voltage and a gate high voltage, and starting a shutdown process when the voltage values of the power supply voltage, the input power and the gate high voltage are all in a decreasing state;
and
in the shutdown process, making source driving signals to be equal to a reference ground voltage, generating each of gate scan signals with a high voltage pulse, and making a common voltage to be equal to the reference ground voltage,
wherein the power supply voltage, the gate high voltage and the common voltage are generated according to the input power.

1 more element

Dependencies are inferred from the claim text.

Facts

Application: 16/357,332Filed 19 Mar 2019
Priority: TW 10710995723 Mar 2018
Published: 26 Sep 2019
Term ends: Not estimatedThe source records don’t support an estimate.

Classification11 codes

G09G 3/20
Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes: for presentation of an…
G09G 2310/0291
Details of driving circuits: details of output amplifiers or buffers arranged for use in a driving circuit
G09G 2310/0297
Details of driving circuits: special arrangements with multiplexing or demultiplexing of display data in the drivers for data electrodes, in a…
G09G 2320/0247
Improving the quality of display appearance: flicker reduction other than flicker reduction circuits used for single beam cathode-ray tubes