Driving circuit for display panel and display apparatus

Patent metadata

Field	Value
Publication number	US-2017329165-A1
Application number	US-201615521362-A
Country	US
Kind code	A1
Filing date	Oct 17, 2016
Priority date	Oct 30, 2015
Publication date	Nov 16, 2017
Grant date	—

Abstract

A driving circuit for a display panel is provided as well as a display apparatus. The driving circuit includes a plurality of timing controllers, a plurality of source drivers and a gamma voltage generation circuit. The gamma voltage generation circuit is used to supply a plurality of gamma voltages to each of the plurality of source drivers. The display apparatus includes the driving circuit.

First claim

1 . A driving circuit for a display panel, wherein the display panel has a plurality of display areas, the driving circuit comprising:
a plurality of source drivers each configured to generate and supply grayscale voltages to a respective one of the plurality of display areas, the grayscale voltages being generated by use of a plurality of gamma voltages as reference voltages; a plurality of timing controllers each configured to control a respective one of the plurality of source drivers to generate and supply respective grayscale voltages; and a gamma voltage generation circuit configured to supply the plurality of gamma voltages to at least two of the plurality of source drivers.

2 . The driving circuit of claim 1 , further comprising a first direct current (DC) power source for supplying power to the gamma voltage generation circuit.

3 . The driving circuit of claim 2 , wherein the gamma voltage generation circuit comprises a digital circuit portion and an analog circuit portion, and wherein the first DC power source comprises a single DC/DC converter for supplying DC voltages to both the digital circuit portion and the analog circuit portion of the gamma voltage generation circuit.

4 . The driving circuit of claim 2 , wherein the first DC power source comprises two DC/DC converters, one of which used for supplying a DC voltage to the digital circuit portion of the gamma voltage generation circuit, the other one of which used for supplying a DC voltage to the analog circuit portion of the gamma voltage generation circuit.

5 . The driving circuit of claim 2 , further comprising at least one second DC power source for supplying power to the plurality of timing controllers.

6 . The driving circuit of claim 5 , wherein each of the plurality of timing controllers is powered by a respective one of the at least one second DC power source.

7 . The driving circuit of claim 5 , wherein at least two of the plurality of timing controllers are powered by one of the at least one second DC power source.

8 . The driving circuit of claim 5 , wherein the at least one second DC power source is further used for supplying power to the plurality of source drivers.

9 . The driving circuit of claim 8 , wherein each of the plurality of source drivers comprises a digital circuit portion and an analog circuit portion, and wherein each of the at least one second DC power source comprises a single DC/DC converter for supplying DC voltages to a respective one or more of the plurality of timing controllers and both the digital circuit portion and the analog circuit portion of a respective one or more of the plurality of source drivers.

10 . The driving circuit of claim 8 , wherein each of the plurality of source drivers comprises a digital circuit portion and an analog circuit portion, and wherein each of the at least one second DC power source comprises two DC/DC converters, one of which used for supplying DC voltages to a respective one or more of the plurality of timing controllers and the digital circuit portion of a respective one or more of the plurality of source drivers, the other one of which used for supplying a DC voltage to the analog circuit portion of a respective one or more of the plurality of source drivers.

11 . A display apparatus comprising the driving circuit as recited in claim 1 .

12 . A display apparatus comprising the driving circuit as recited in claim 2 .

13 . A display apparatus comprising the driving circuit as recited in claim 3 .

14 . A display apparatus comprising the driving circuit as recited in claim 4 .

15 . A display apparatus comprising the driving circuit as recited in claim 5 .

16 . A display apparatus comprising the driving circuit as recited in claim 6 .

17 . A display apparatus comprising the driving circuit as recited in claim 7 .

18 . A display apparatus comprising the driving circuit as recited in claim 8 .

19 . A display apparatus comprising the driving circuit as recited in claim 9 .

20 . A display apparatus comprising the driving circuit as recited in claim 10 .

Assignees

• Boe Technology Group Co Ltd

Inventors

• Li Shou
• Jing Yaoqiu

Classifications

• G02F1/13452

  Conductors connecting driver circuitry and terminals of panels · CPC title

• G02F2203/30

  Gray scale · CPC title

• G09G3/36

  using liquid crystals · CPC title

• G09G3/2092

  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

• G02F1/0123

  Circuits for the control or stabilisation of the bias voltage, e.g. automatic bias control [ABC] feedback loops · CPC title