Display Driver Saturation Enhancement Circuit Size Reduction
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Solution Overview
Problem
Existing saturation enhancement techniques for display devices, particularly in liquid crystal display devices with narrow color gamut, require increased circuit size to achieve effective saturation enhancement, especially when combined with contrast enhancement, leading to inefficiencies and increased complexity.
Innovation Solution
A method for saturation enhancement that involves performing correction calculations on input image data to generate output image data with adjusted starting points on input-output curves for each color channel, reducing the circuit size required for saturation enhancement processing while allowing for improved saturation and compatibility with contrast enhancement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If saturation enhancement processing is performed after contrast enhancement processing with increased bit width, then saturation enhancement is achieved, but circuit size increases
Solution Approach 1:
The patent changes the bit width parameter from 10 bits to 8 bits by selectively truncating the least significant bits of the contrast-enhanced image data. This parameter change allows the saturation enhancement circuit to operate with reduced precision requirements, thereby reducing circuit size while still achieving effective saturation enhancement for display purposes.
Solution Approach 2:
The patent extracts and discards the least significant bits (lower-order bits) from the contrast-enhanced image data before performing saturation enhancement. By removing these less critical bits, the circuit processes only the most significant bits, reducing the computational complexity and circuit size required for saturation enhancement while maintaining visual quality.
2Reliability
If bit width is increased to avoid gradation collapse in contrast enhancement, then image quality is maintained, but circuit size increases
Solution Approach 1:
The patent optimizes the bit width parameter by determining that 8 bits are sufficient for saturation enhancement processing. This parameter optimization maintains image quality for display purposes while reducing the circuit size compared to processing full 10-bit or higher precision data through the saturation enhancement stage.
Solution Approach 2:
The patent applies partial precision processing by using full precision (10 bits) for contrast enhancement where it is critical, then reducing to 8 bits for saturation enhancement where slightly lower precision is acceptable. This partial application of high precision only where necessary maintains image quality while reducing overall circuit complexity.
Data Source
AI summary
A display panel driver includes: a correction calculation section which performs correction calculations on input image data to generate saturation-enhanced output image data and a drive circuitry driving the display panel in response to the output image data and a starting point control section. The correction calculation section generates red (R) data, green (G) data and blue (B) data of the output image data by performing the correction calculations on R data, G data and B data of the input image data, respectively. The starting point control section controls the positions of starting points of the input-output curves of the correction calculations.