Driving system supporting multiple display modes

Patent metadata

Field	Value
Publication number	US-10147396-B2
Application number	US-201615308339-A
Country	US
Kind code	B2
Filing date	Jul 12, 2016
Priority date	May 5, 2016
Publication date	Dec 4, 2018
Grant date	Dec 4, 2018

Abstract

A driving system capable of supporting multiple display modes is provided. The driving system includes a memory for storing gamma codes corresponding to various display modes, a gamma voltage generation device producing gamma voltages corresponding to the gamma codes, and a timing controller accessing the gamma codes stored in the memory and writing the gamma codes into the gamma voltage generation device according to mode switch signals. The gamma voltage generation device then produces gamma voltages corresponding to the input gamma codes during the vertical blank interval of the display device, thereby achieving display mode switch. The memory may also be integrated in the timing controller. Compared to the prior art, the driving system is compatible with various display modes with reduced cost.

First claim

What is claimed is:

1. A driving system for a display device, comprising:
a memory comprising a plurality of storage spaces, each storing a gamma code corresponding to one of a plurality display modes;
a gamma voltage generation device comprising two memory banks where a first memory bank stores a first gamma code for a current display mode, and the gamma voltage generation device produces a first gamma voltage corresponding to the first gamma code; and
a timing controller connected to the memory through a first set of wires and connected to the gamma voltage generation device through a second set of wires, where the timing controller accesses the gamma codes stored in the memory and writes a gamma code into a memory bank of the gamma voltage generation device;
wherein, after receiving a mode switch signal to switch from the current display mode to a next display mode, the timing controller retrieves a second gamma code corresponding to the next display mode from the memory and writes the second gamma code into a second memory bank of the gamma generation device; and the gamma voltage generation device produces a second gamma voltage corresponding to the second gamma code stored in the second memory bank during a vertical blank interval of the display device, thereby achieving display mode switch.

2. A driving method for a display device, comprising:
providing a memory, a timing controller, and a gamma voltage generation device, where the gamma voltage generation device comprises two memory banks, the timing controller is connected to the memory and the gamma voltage generation device;
storing a plurality of gamma codes, each corresponding a display mode, in the memory;
writing a first gamma code for a current display mode in a first memory bank of the gamma voltage generation device by the timing controller;
producing a first gamma voltage corresponding to the first gamma code by the gamma voltage generation device;
after receiving a mode switch signal to switch from the current display mode to a next display mode, retrieving a second gamma code corresponding to the next display mode from the memory and writing the second gamma code into a second memory bank of the gamma voltage generation device by the timing controller; and
producing a second gamma voltage corresponding to the second gamma code stored in the second memory bank during a vertical blank interval of the display device by the gamma voltage generation device, thereby achieving display mode switch.

Assignees

• Shenzhen China Star Optoelect
• Shenzhen China Star Optoelect

Inventors

• Chen Yu-Yeh
• Wu Yu
• Xie Jianjun

Classifications

• G09G2320/0673

  for control of gamma adjustment, e.g. selecting another gamma curve · CPC title

• G09G5/001

  Arbitration of resources in a display system, e.g. control of access to frame buffer by video controller and/or main processor · CPC title

• G09G2310/0264

  Details of driving circuits · CPC title

• G09G3/36

  using liquid crystals · CPC title

• G09G2320/0276

  for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction · CPC title