Display apparatus and method of powering the same

Patent metadata

Field	Value
Publication number	US-2022066612-A1
Application number	US-202017279716-A
Country	US
Kind code	A1
Filing date	Aug 28, 2020
Priority date	Sep 30, 2019
Publication date	Mar 3, 2022
Grant date	—

Abstract

A display apparatus and a method of powering the display apparatus are provided. The display apparatus includes: a main control circuit, configured to provide a first control signal; a touch display driving circuit, configured to provide a second control signal; a power supply circuit, coupled to the touch display driving circuit, and configured to provide a power supply voltage to the touch display driving circuit; and a logic circuit coupled to the main control circuit, the touch display driving circuit, and the power supply circuit, and configured to continuously enable the power supply circuit in a first mode and intermittently enable the power supply circuit in a second mode, under a control of the first control signal and the second control signal.

First claim

1 . A display apparatus, comprising:
a main control circuit, configured to provide a first control signal; a touch display driving circuit, configured to provide a second control signal; a power supply circuit, coupled to the touch display driving circuit, and configured to provide a power supply voltage to the touch display driving circuit; and a logic circuit, coupled to the main control circuit, the touch display driving circuit, and the power supply circuit, and configured to continuously enable the power supply circuit in a first mode and intermittently enable the power supply circuit in a second mode, under a control of the first control signal and the second control signal.

2 . The display apparatus of claim 1 , wherein:
the main control circuit is configured to provide a first control signal at a first level in the first mode, and provide a first control signal at a second level in the second mode; and the touch display driving circuit is configured to provide a second control signal at a third level in the first mode, and periodically provide a second control signal at a fourth level in the second mode.

3 . The display apparatus of claim 2 , wherein the logic circuit comprises an OR gate, wherein a first input end of the OR gate is coupled to the main control circuit to receive the first control signal, a second input end of the OR gate is coupled to the touch display driving circuit to receive the second control signal, and an output end of the OR gate is coupled to an enable end of the power supply circuit.

4 . The display apparatus of claim 1 , wherein the touch display driving circuit is coupled to the main control circuit, the touch display driving circuit is further configured to perform touch detection in the second mode by using the power supply voltage provided by the power supply circuit, and the main control circuit is further configured to switch the display apparatus from the second mode to the first mode based on a result of the touch detection result performed by the touch display driving circuit.

5 . The display apparatus of claim 4 , wherein the result of the touch detection indicates whether a preset touch action has occurred.

6 . The display apparatus of claim 4 , further comprising: an auxiliary circuit, coupled to the touch display driving circuit, and configured to provide to the touch display driving circuit an auxiliary voltage lower than the supply voltage, wherein the touch display driving circuit is further configured to generate the second control signal by using the auxiliary voltage.

7 . The display apparatus of claim 1 , wherein the touch display driving circuit comprises a general-purpose input/output (GPIO) interface, and the touch display driving circuit is coupled to the logic circuit via the general input/output (GPIO) interface.

8 . The display apparatus of claim 1 , wherein the touch display driving circuit is a touch and display driver integration (TDDI) circuit.

9 . The display apparatus of claim 1 , wherein the first mode is an active mode, and the second mode is an idle mode.

10 . The display apparatus of claim 1 , wherein each of the first level and the fourth level is a high level, and each of the second level and the third level is a low level.

11 . A method of powering a display apparatus of claim 1 , comprising:
in a first mode, providing a first control signal by a main control circuit, providing a second control signal by a touch display driving circuit, and continuously enabling a power supply circuit to provide a power supply voltage to the touch display driving circuit, by a logic circuit based on the first control signal and the second control signal; and in a second mode, providing a first control signal by the main control circuit, providing a second control signal by the touch display driving circuit, and intermittently enabling the power supply circuit to provide a power supply voltage to the touch display driving circuit, by the logic circuit based on the first control signal and the second control signal.

12 . The method of claim 11 , wherein the logic circuit comprises an OR gate,
wherein in the first mode, providing a first control signal at a first level by the main control circuit, and providing a second control signal at a third level by the touch display driving circuit, so that the logic circuit continuously enables the power supply circuit to provide the power supply voltage to the touch display driving circuit; and wherein in the second mode, providing a first control signal at a second level by the main control circuit, and periodically providing a second control signal at a fourth level by the touch display driving circuit, so that the logic circuit periodically enables the power supply circuit to provide the power supply voltage to the touch display driving circuit.

13 . The method of claim 12 , wherein the periodically providing a second control signal at a fourth level comprises: providing the second control signal at the fourth level in a blanking period of each frame.

14 . The method of claim 13 , further comprising: in the second mode,
performing, by the touch display driving circuit, touch detection in the blanking period, and switching, by the main control circuit, the display apparatus from the second mode to the first mode.

15 . The method of claim 14 , wherein the main control circuit switches the display apparatus from the second mode to the first mode based on whether a preset touch action has occurred.

16 . The display apparatus of claim 2 , wherein the touch display driving circuit is a touch and display driver integration (TDDI) circuit.

17 . The display apparatus of claim 2 , wherein the first mode is an active mode, and the second mode is an idle mode.

18 . The display apparatus of claim 2 , wherein each of the first level and the fourth level is a high level, and each of the second level and the third level is a low level.

19 . The display apparatus of claim 3 , wherein the touch display driving circuit is a touch and display driver integration (TDDI) circuit.

20 . The display apparatus of claim 3 , wherein the first mode is an active mode, and the second mode is an idle mode.

Assignees

• Beijing Boe Optoelectronics Tech Co Ltd
• Boe Technology Group Co Ltd

Inventors

• Xiao Pin
• Chen Xiuyun
• He Zongze
• Xu Zhenguo
• Zhang Yehao
• Huang Yadong
• Zhao Jing

Classifications

• G06F1/3262

  Power saving in digitizer or tablet · CPC title

• G06F1/3265

  Power saving in display device · CPC title

• G06F1/3218

  of display devices · CPC title

• G06F1/3206

  Monitoring of events, devices or parameters that trigger a change in power modality · CPC title

• G09G2330/021

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