Shared Converter Circuit for RGB Signal Mismatch Reduction
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Solution Overview
Problem
Existing signal conversion circuits in display systems face mismatches due to timing skew between clock generators and voltage differences between reference voltage generators, leading to color shifts and increased manufacturing costs from calibration methods.
Innovation Solution
A signal conversion circuit comprising identical conversion units and shared clock and reference voltage generators, along with a multiplexer and de-multiplexer, to synchronize and standardize the conversion process, eliminating mismatches and simplifying the circuit structure.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If multiple independent converters are used to handle multiple color signals, then the conversion capacity is improved, but mismatches between converters increase due to timing skew and voltage differences
Solution Approach 1:
The patent merges multiple independent converters into a single integrated converter that processes multiple color signals sequentially. This single converter shares common clock and reference voltage generators, eliminating timing skew and voltage differences between separate converters while maintaining the ability to handle multiple color channels through time-division multiplexing
Solution Approach 2:
The patent creates a universal converter structure that can handle multiple color signals (R, G, B) using the same conversion circuitry. The converter is designed to be multi-functional by processing different color channels in sequence, controlled by a multiplexer that routes different color signals to the same conversion unit at different time slots
2Manufacturing precision
If calibration circuits are added to compensate for mismatches, then the conversion accuracy is improved, but the circuit complexity and manufacturing cost increase
Solution Approach 1:
The patent extracts and eliminates the source of mismatches by removing independent clock generators and reference voltage generators from each converter. Instead, these critical components are shared across all color channels, taking out the problematic elements that caused timing skew and voltage differences in the first place
Solution Approach 2:
The patent implements a self-calibrating system where the converter automatically compensates for mismatches using built-in calibration circuits that are integrated into the main conversion path. The system performs self-adjustment during operation, eliminating the need for external calibration equipment or complex additional compensation circuits
3Adaptability or versatility
If separate clock generators are used for each converter, then the independence of each converter is improved, but timing skew between converters increases
Solution Approach 1:
The patent merges separate clock generators into a single shared clock source that serves all color channels. This unified clock system eliminates timing skew between converters by providing a common time reference, while the multiplexer and control logic maintain the functional independence needed for processing different color signals
Data Source
AI summary
A circuit and method for improving mismatches between signal converters includes at least two conversion units, a clock generator and a reference voltage generator. The conversion units share the clock generator and/or the reference voltage generator so as to improve mismatches between the conversion units.