Integrated Gamma and Common Voltage Generator in Source Driving Circuit
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Solution Overview
Problem
Conventional liquid crystal displays incur extra costs due to the separate design of gamma and common voltage circuits within the timing controller system, necessitating a solution to integrate these functions into the source driving circuit for cost savings.
Innovation Solution
Incorporating a gamma voltage generator and a common voltage generator into the source driving circuit, which receive data from the timing controller via reduced swing differential signaling (RSDS) to generate gamma and common voltages, allowing the driver to modify image data and transmit it to the display panel, thereby eliminating the need for separate gamma and common voltage circuits in the timing controller system.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If gamma circuit and common voltage circuit are designed separately in the timing controller system, then the system can provide stable gamma voltage and common voltage, but the manufacturing cost increases due to additional hardware components
Solution Approach 1:
The patent combines the gamma circuit and common voltage circuit into a single integrated circuit module within the timing controller system. This merging reduces the number of separate hardware components, simplifies the overall system architecture, and lowers manufacturing costs while maintaining the functional separation and voltage stability through internal circuit design
2Ease of manufacture
If gamma circuit and common voltage circuit are integrated into the source driving circuit, then the manufacturing cost is reduced by eliminating separate circuits, but the source driving circuit complexity increases
Solution Approach 1:
The patent segments the integrated circuit into distinct functional modules: a gamma voltage generation module and a common voltage generation module. Each module handles specific voltage generation tasks independently, which reduces the operational complexity within the integrated design and facilitates easier manufacturing and maintenance despite the integration
3Adaptability or versatility
If separate gamma and common voltage circuits are used in the timing controller system, then the voltage generation functions are well-defined, but the system requires additional hardware components increasing overall system complexity
Solution Approach 1:
The patent designs a universal voltage generation module that can function as both a gamma voltage generator and a common voltage generator. This multi-functional module responds to different control signals to perform either function as needed, reducing the number of hardware components while maintaining clear functional definitions through software or control signal differentiation
Data Source
AI summary
A source driving circuit includes a gamma voltage generator, a common voltage generator and a driver. The gamma voltage generator receives gamma data from a timing controller through reduced swing differential signaling (RSDS) transmission interface to generate corresponding gamma voltages. The common voltage generator receives common voltage data from the timing controller to generate a corresponding common voltage. The driver receives image data from the timing controller through the RSDS transmission interface, the gamma voltages from the gamma voltage generator and the common voltage from the common voltage generator for modifying the image data using the gamma voltages and the common voltage and transmitting the modified image data to a panel of the liquid crystal display.