LCD Driving System Gamma Correction via Timing Control Circuit
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Solution Overview
Problem
The existing liquid crystal display (LCD) driving systems are complex and costly due to the requirement of a programmable gamma (P-Gamma) circuit for gamma correction, which needs to be omitted to reduce production costs.
Innovation Solution
A driving system and method for an LCD device that uses a timing control circuit to convert data into gamma and pixel gray reference voltages, which are then processed by a data driving circuit to obtain pixel gray voltage through gamma correction, eliminating the need for a P-Gamma circuit, utilizing a storage module, timing control module, D/A converter, and operational amplifier to achieve gamma correction via IIC communication protocol.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a P-Gamma circuit is used for gamma correction, then gamma correction can be achieved, but the manufacturing complexity and cost increase
Solution Approach 1:
The patent extracts the P-Gamma circuit from the LCD driving system and replaces it with a simplified architecture using a timing control circuit and data driving circuit. The timing control circuit stores gamma voltage data and generates pixel gray reference voltage data, while the data driving circuit converts these to actual voltages and performs gamma correction, thereby eliminating the complex P-Gamma circuit while maintaining gamma correction functionality.
Solution Approach 2:
The patent uses a timing control circuit to store gamma voltage data in advance and generate corresponding pixel gray reference voltage data. This pre-stored data is then converted to voltages by the data driving circuit, effectively copying the gamma correction function from the traditional P-Gamma circuit to a simpler timing control and data driving architecture.
2Reliability
If a P-Gamma circuit is used for gamma correction, then gamma correction can be achieved, but the production cost increases
Solution Approach 1:
The patent removes the expensive P-Gamma circuit from the manufacturing process and replaces it with standard timing control and data driving circuits that are already present in the LCD system. This extraction of the P-Gamma circuit directly reduces production cost while maintaining gamma correction through the alternative timing control and data driving approach.
Solution Approach 2:
The timing control circuit and data driving circuit are designed to perform multiple functions: the timing control circuit both stores gamma voltage data and generates pixel gray reference voltage data, while the data driving circuit both converts data to voltages and performs gamma correction. This multi-functionality eliminates the need for a separate P-Gamma circuit, reducing production cost.
3Reliability
If a P-Gamma circuit is used, then gamma correction is available, but the system requires more components
Solution Approach 1:
The patent merges the gamma correction function with the existing timing control circuit and data driving circuit. The timing control circuit combines gamma voltage data storage and pixel gray reference voltage generation, while the data driving circuit combines voltage conversion and gamma correction operations. This merging eliminates the need for a separate P-Gamma circuit and its associated components.
Solution Approach 2:
The timing control circuit serves multiple purposes: storing gamma voltage data, generating pixel gray reference voltage data, and controlling the timing of operations. The data driving circuit also performs multiple functions: converting gamma voltage data to voltages, converting pixel gray reference voltage data to voltages, and performing gamma correction. This multi-functionality reduces the total number of components required.
Data Source
AI summary
The present disclosure discloses a driving system of LCD, which includes: a timing control circuit is used to storage a data converted to gamma voltage; a data driving circuit for receiving the data converted to gamma voltage and the data converted to pixel gray reference voltage from the timing control circuit is used to convert the data converted to gamma voltage and the data converted to pixel gray reference voltage to a gamma voltage and a pixel gray reference voltage respectively and is used to obtain a pixel gray voltage by the converted gamma voltage gamma correct to the converted pixel gray reference voltage. The present disclosure further discloses a driving method and a device thereof. When the LCD device of the present disclosure is capable of performing gamma correction, the P-Gamma circuit will be omitted, greatly reducing the cost of production, so as to enhance the market competitiveness.