Driving system supporting multiple display modes

• US 10,147,396 B2
• Filed: 07/12/2016
• Issued: 12/04/2018
• Est. Priority Date: 05/05/2016
• Status: Active Grant

• Current Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Original Assignee: Shenzhen China Star Optoelectronics Technology Co., Ltd. (TCL Technology Group Corp.)
• Inventors: Chen, Yu-yeh, Wu, Yu, Xie, Jianjun
• Primary Examiner(s): HICKS, CHARLES V
• Application Number:
  US15/308,339
• Publication Number:
  US 20180151155A1
• Time in Patent Office: 875 Days
• CPC Class Codes: G06F 3/1438 using more than one graphics controller
• CPC Class Codes: G09G 2310/0243 Details of the generation of driving signals
• CPC Class Codes: G09G 2310/0264 Details of driving circuits
• CPC Class Codes: G09G 2320/0276 for the purpose of adaptation to the characteristics of a display device, i.e. gamma correction
• CPC Class Codes: G09G 2320/0673 for control of gamma adjustment, e.g. selecting another gamma curve
• CPC Class Codes: G09G 2330/028 Generation of voltages supplied to electrode drivers in a matrix display other than LCD
• CPC Class Codes: G09G 3/2096 Details of the interface to the display terminal specific for a flat panel suitable for both CRT and flat panel G09G5/006; specific for a CRT G09G1/167
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 5/001 Arbitration of resources in a display system, e.g. control of access to frame buffer by video controller and/or main processor
• CPC Class Codes: G09G 5/10 Intensity circuits
• CPC Class Codes: G09G 5/18 Timing circuits for raster scan displays specially adapted for television H04N ; synchronisation between the display unit and other display units, videodisc player G09G5/12
• CPC Class Codes: G09G 5/222 Control of the character-code memory

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.

Claims

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.