Input Signal Correction Circuit for Display Panels
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Solution Overview
Problem
Existing input signal correction devices for display panels with unequal R, G, and B subpixels are not compatible with various panel models, leading to increased power consumption and high development costs due to the need for specific semiconductor circuits for each model.
Innovation Solution
An input signal correction device that includes an input circuit, extension/degeneration circuit, correction circuit, separation/recovery circuit, delay adjustment circuit, and adder circuit, capable of adjusting signal cycles and frequencies to accommodate different subpixel ratios, allowing compatibility with various display panel configurations while reducing power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a specific semiconductor circuit is developed for each display panel model to ensure compatibility, then compatibility with various panel models is improved, but development cost and device complexity increase
Solution Approach 1:
The input signal correction device is designed with a universal architecture that can handle multiple display panel configurations (RGBG, RBGB, GRBR, and equal subpixel panels) through a single device design. The extension/degeneration circuit and separation/recovery circuit can dynamically adjust their operation based on the panel type, eliminating the need for separate semiconductor circuits for each panel model while maintaining full compatibility.
2Reliability
If signal processing is performed at full operating frequency to maintain correction performance, then mura correction performance is improved, but power consumption increases
Solution Approach 1:
The device employs periodic action by operating the correction circuit at a reduced frequency (f/N) rather than continuously at full operating frequency. The extension/degeneration circuit prepares signals by extending their cycle length, allowing the correction circuit to process one correction signal every N input signal cycles. This periodic operation maintains correction effectiveness while reducing power consumption by a factor of N during the correction process.
Data Source
AI summary
An input signal correction device for reducing power consumption is compatible with a variety of display panels, and includes an input circuit, extension/degeneration circuit, separation/recovery circuit and delay adjustment circuit operating at frequency f, demura circuit operating at frequency f/2, and adder circuit. The extension/degeneration circuit outputs a preprocessing signal increasing the input signal cycle length by 2 or outputs by degenerating the input signal to ½, based on a control signal, the demura circuit outputs a correction signal correcting the preprocessing signal from the extension/degeneration circuit, the separation/recovery circuit outputs a differential signal reducing the correction signal cycle length to ½ or reduces cycle length to ½ and outputs the same differential signal over two cycles, based on a control signal, the delay adjustment circuit outputs a delay signal delaying the input signal, and the adder circuit outputs a signal adding the differential signal to the delay signal.