Display module and heating method thereof

Patent metadata

Field	Value
Publication number	US-11867994-B2
Application number	US-202017139486-A
Country	US
Kind code	B2
Filing date	Dec 31, 2020
Priority date	Oct 30, 2020
Publication date	Jan 9, 2024
Grant date	Jan 9, 2024

Abstract

A display module includes: a heating circuit, a gating circuit and a plurality of heating lines. The heating circuit includes a first type of heating signal output terminal and a second type of heating signal output terminal, and the gating circuit includes a gating unit. The first type of heating signal output terminal is electrically connected to a first type of signal input terminal of the gating unit, and a first type of signal output terminal of the gating unit is electrically connected to a first terminal of a heating line; and/or the second type of heating signal output terminal is electrically connected to a second type of signal input terminal of the gating unit, and a second type of signal output terminal of the gating unit is electrically connected to a second terminal of the heating line.

First claim

What is claimed is:

1. A display module, comprising:
a display panel, a control circuit, a heating circuit, a gating circuit, and a plurality of heating lines;
wherein the heating circuit comprises at least one first type of heating signal output terminal and at least one second type of heating signal output terminal, wherein the gating circuit comprises at least one gating unit, wherein a gating signal output terminal of the control circuit is electrically connected to a gating signal input terminal of the gating circuit, and a heating control signal output terminal of the control circuit is electrically connected to a heating control signal input terminal of the heating circuit;
wherein the heating circuit and the gating circuit comprise at least one of the following connection modes: each of the at least one first type of heating signal output terminal is electrically connected to a first type of signal input terminal of a gating unit among the at least one gating unit, and a first type of signal output terminal of the gating unit among the at least one gating unit is electrically connected to a first terminal of a heating line among the plurality of heating lines; or
wherein each of the at least one second type of heating signal output terminal is electrically connected to a second type of signal input terminal of the gating unit among the at least one gating unit, and wherein a second type of signal output terminal of the gating unit among the at least one gating unit is electrically connected to a second terminal of the heating line among the plurality of heating lines; and
wherein first terminals of the plurality of heating lines electrically connected to a same one of the at least one gating unit are electrically connected to a same one of the at least one first type of heating signal output terminal.

2. The display module of claim 1 ,
wherein the at least one first type of heating signal output terminal is electrically connected to first type of signal input terminals of the gating circuit, and first type of signal output terminals of the gating circuit are electrically connected to first terminals of the plurality of heating lines;
wherein the gating circuit further comprises: a plurality of first thin-film transistors and a plurality of gating signal lines, wherein each of the plurality of gating signal lines is electrically connected to a gating output terminal of the control circuit;
wherein the plurality of first thin-film transistors is electrically connected to first terminals of respective ones of the plurality of heating lines, and wherein the plurality of first thin-film transistors in the same one of the at least one gating unit corresponds to one preset trace and is electrically connected to the same one of the at least one first type of heating signal output terminal; and
wherein the plurality of first thin-film transistors in the same one of the at least one gating unit has drains electrically connected to first terminals of corresponding ones of the plurality of heating lines, has sources corresponding to the one preset trace and electrically connected to the same one of the at least one first type of heating signal output terminal, and has gates electrically connected to different gating signal lines.

3. The display module of claim 1 , wherein second terminals of the plurality of heating lines are electrically connected to a same one of the at least one second type of heating signal output terminal.

4. The display module of claim 3 ,
wherein the at least one second type of heating signal output terminal is electrically connected to second type of signal input terminals of the gating circuit, wherein second type of signal output terminals of the gating circuit are electrically connected to second terminals of the plurality of heating lines, and a gating signal line is electrically connected to a gating output terminal of the control circuit;
wherein the gating circuit comprises: a plurality of first thin-film transistors and a plurality of gating signal lines, wherein each of the plurality of gating signal lines is electrically connected to a gating output terminal of the control circuit;
wherein each of the plurality of first thin-film transistors is electrically connected to a second terminal of a respective one of the plurality of heating lines; and
wherein the plurality of first thin-film transistors in the same one of the at least one gating unit has drains being electrically connected to second terminals of corresponding ones of the plurality of heating lines, has sources electrically connected to the same one of the at least one second type of heating signal output terminal, and has gates electrically connected to a different one of the plurality of gating signal lines.

5. The display module of claim 1 , wherein the plurality of heating lines and the at least one gating unit are integrated in the display panel.

6. The display module of claim 1 , further comprising:
a backlight module disposed opposite to the display panel, wherein the plurality of heating lines is disposed on a side of the display panel facing towards or facing away from the backlight module;
a flexible circuit board; and
a printed circuit board;
wherein the at least one gating unit is disposed on the flexible circuit board or the printed circuit board.

7. The display module of claim 1 , further comprising a temperature sensor, wherein a temperature signal input terminal of the control circuit is electrically connected to an output terminal of the temperature sensor.

8. The display module of claim 7 , further comprising a flexible circuit board and a printed circuit board;
wherein the control circuit is disposed on the flexible circuit board or the printed circuit board, and the heating circuit is disposed on the flexible circuit board or the printed circuit board; and
wherein the temperature sensor comprises a Wheatstone bridge, wherein the Wheatstone bridge comprises a first type of resistor and a second type of resistor, wherein the first type of resistor is integrated in the display panel; wherein the second type of resistor is integrated in the display panel, disposed on the flexible circuit board, or disposed on the printed circuit board.

9. The display module of claim 1 , wherein the display panel comprises at least two heating zones; wherein each of the at least two heating zones is provided with at least one temperature sensor.

10. The display module of claim 9 , wherein heating lines disposed in a same one of the at least two heating zones is electrically connected to different gating units of the at least one gating unit.

11. The display module of claim 9 , wherein heating lines disposed in a same one of the at least two heating zones is electrically connected to a same one of the at least one gating unit.

12. The display module of claim 11 , wherein each of the plurality of heating lines is respectively provided with one temperature sensor.

13. The display module of claim 1 , further comprising a heating source device;
wherein the display panel comprises at least two heating zones; wherein the at least two heating zones and the heating source device are arranged along a first direction, wherein each of the plurality of heating lines extends in a second direction, wherein the first direction intersects the second direction; and
wherein one of the at least two heating zones closer to the heating source device is a first heating zone; and wherein the heating circuit provides less power to the first heating zone than to other heating zones of the at least two heating zones.

14. The display module of claim 13 , wher

Assignees

• Shanghai Avic Opto Electronics Co Ltd

Inventors

• Wang Xiangchun
• Ding Xiaoyuan
• Xiong Guanzhong
• Zhao Jian

Classifications

• G02F1/133382 Primary

  Heating or cooling of liquid crystal cells other than for activation, e.g. circuits or arrangements for temperature control, stabilisation or uniform distribution over the cell · CPC title

• G01K7/16

  using resistive elements · CPC title

• H05B1/0202 Primary

  Switches · CPC title

• H05B1/023 Primary

  Industrial applications · CPC title

• H05B3/34

  flexible, e.g. heating nets or webs · CPC title