Display drive circuit, display drive method and display panel

Patent metadata

Field	Value
Publication number	US-12406624-B2
Application number	US-202418621066-A
Country	US
Kind code	B2
Filing date	Mar 28, 2024
Priority date	Mar 28, 2023
Publication date	Sep 2, 2025
Grant date	Sep 2, 2025

Abstract

Disclosed are a display drive circuit, a display drive method and a display panel. This solution adjusts enabling time of a first drive unit and a second drive unit based on light-emitting brightness of a first display unit and light-emitting brightness of a second display unit which are detected by a display detection unit, and the service lives of the first display unit and the second display unit are effectively prolonged.

First claim

What is claimed is:

1. A display drive circuit, comprising: a first drive unit, a second drive unit, a display detection unit and a control unit; wherein,
the control unit is connected with the first drive unit and the second drive unit respectively, and used for sending a data signal to the first drive unit and the second drive unit alternately;
the first drive unit is connected with a first display unit, and used for driving the first display unit to emit light according to the data signal; the second drive unit is connected with a second display unit, and used for driving the second display unit to emit light according to the data signal; and
the display detection unit is connected with the control unit, and used for detecting a first light-emitting brightness of the first display unit and a second light-emitting brightness of the second display unit, and transmitting the first light-emitting brightness of the first display unit and the second light-emitting brightness of the second display unit to the control unit, and the control unit is configured to adjust a first enabling time of the first drive unit according to the received first light-emitting brightness and a second enabling time of the second drive unit according to the second received light-emitting brightness;
wherein the control unit comprises: a first thin-film-transistor, a second thin-film-transistor and a control switch;
a data line of the data signal is connected to an input end of the first thin-film-transistor, the first drive unit is connected to an output end of the first thin-film-transistor, and the control switch is connected to a control end of the first thin-film-transistor; and
the data line of the data signal is connected to an input end of the second thin-film-transistor, the second drive unit is connected to an output end of the second thin-film-transistor, and the control switch is connected to a control end of the second thin-film-transistor;
wherein the control switch comprises: a first control switch and a second control switch, the first control switch is turned on when receiving a first polarity signal, the second control switch is turned on when receiving a second polarity signal, and the first polarity signal and the second polarity signal are opposite-polarity signals; wherein
a switching circuit signal line of a switching circuit signal is connected to a control end of the first control switch, a scanning signal line of a scanning signal is connected to an input end of the first control switch, and an output end of the first control switch is connected with the control end of the first thin-film-transistor; and
the switching circuit signal line is connected to a control end of the second control switch, the scanning signal line is connected to an input end of the second control switch, and an output end of the second control switch is connected with the control end of the second thin-film-transistor-.

2. The display drive circuit of claim 1 , wherein the display detection unit comprises: a first display detection circuit and a second display detection circuit, and the first display detection circuit and the second display detection circuit are connected with the control unit respectively;
the first display detection circuit is used for detecting the first light-emitting brightness of the first display unit, and the second display detection circuit is used for detecting the second light-emitting brightness of the second display unit; and
the control unit is used for adjusting the switching circuit signal according to the first light-emitting brightness of the first display unit and the second light-emitting brightness of the second display unit.

3. The display drive circuit of claim 2 , wherein the first display detection circuit comprises: a first photoresistor, a first end of the first photoresistor is connected with a control end of the first drive unit, and a second end of the first photoresistor is connected with the control unit, and further connected with a grounding resistor.

4. The display drive circuit of claim 2 , wherein the second display detection circuit comprises: a second photoresistor, a first end of the second photoresistor is connected with a control end of the second drive unit, and a second end of the second photoresistor is connected with the control unit, and further connected with a grounding resistor.

5. The display drive circuit of claim 1 , further comprising: a first compensation unit and a second compensation unit, wherein,
a first end of the first compensation unit is connected with a control end of the first drive unit, and a constant current source is connected to a second end of the first compensation unit; and
a first end of the second compensation unit is connected with a control end of the second drive unit, and the constant current source is connected a second end of the second compensation unit.

6. The display drive circuit of claim 1 , wherein the first drive unit comprises: a third thin-film-transistor, the control unit is connected to a control end of the third thin-film-transistor, a constant current source is connected to an input end of the third thin-film-transistor, and the first display unit is connected to an output end of the third thin-film-transistor.

7. The display drive circuit of claim 1 , wherein the second drive unit comprises: a fourth thin-film-transistor, the control unit is connected to a control end of the fourth thin-film-transistor, a constant current source is connected to an input end of the fourth thin-film-transistor, and the second display unit is connected to an output end of the fourth thin-film-transistor.

8. A display drive method, applied to a display drive circuit, the display drive circuit comprising: a first drive unit, a second drive unit, a display detection unit and a control unit; wherein the control unit is connected with the first drive unit and the second drive unit respectively, and used for sending a data signal to the first drive unit and the second drive unit alternately; the first drive unit is connected with a first display unit, and used for driving the first display unit to emit light according to the data signal; the second drive unit is connected with a second display unit, and used for driving the second display unit to emit light according to the data signal; the display detection unit is connected with the control unit, and used for detecting a first light-emitting brightness of the first display unit and a second light-emitting brightness of the second display unit, and transmitting the first light-emitting brightness of the first display unit and the second light-emitting brightness of the second display unit to the control unit, and the control unit is configured to adjust a first enabling time of the first drive unit according to the received first light-emitting brightness and a second enabling time of the second drive unit according to the received second light-emitting brightness; and the display drive method comprises:
sending the data signal to the first drive unit and the second drive unit alternately through the control unit, wherein the first drive unit is used for driving the first display unit to emit light according to the data signal, and the second drive unit is used for driving the second display unit to emit light according to the data signal; and
detecting the first light-emitting brightness of the first display unit and the second light-emitting brightness of the second display unit through the display detection unit, and transmitting the first light-emitting brightness of the first display unit and the second light-emitting brightness of the second display unit to the control unit, such that the control unit is configured to adjusts the first enabling

Assignees

• Chongqing Hkc Optoelectronics Tech Co Ltd
• Hkc Corp Ltd

Inventors

• Qiu Bin
• Kang Baohong

Classifications

• G09G2320/0693

  Calibration of display systems · CPC title

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2310/08

  Details of timing specific for flat panels, other than clock recovery · CPC title

• G06F2203/04103

  Manufacturing, i.e. details related to manufacturing processes specially suited for touch sensitive devices · CPC title

• G06F3/0412

  Digitisers structurally integrated in a display · CPC title