Display Driver FRC Circuit Gray Level Optimization
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Solution Overview
Problem
Existing display systems face challenges in simultaneously reducing power consumption for data transfer and improving image quality, particularly in liquid crystal display devices that are not adapted for many-gray-level displays.
Innovation Solution
A display system that includes a transmitting device for compressing image data and a driver with a decompression circuit, an FRC circuit, and a drive circuit, where the number of bits in the compressed data is greater than in the decompressed data, which is then further processed to match the display device's capabilities, using various compression methods and FRC processes to optimize image quality and power efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by stationary object
If compression process is performed on image data to reduce data size, then power consumption for data transfer is reduced, but image quality deteriorates
Solution Approach 1:
The patent segments the image data processing into distinct stages: compression for transmission, decompression for local processing, and FRC for display adaptation. This segmentation allows each stage to optimize for its specific function without compromising the others, resolving the contradiction between compression benefits and quality preservation.
Solution Approach 2:
The decompression circuit acts as an intermediary between the compression circuit and the FRC circuit. It restores the intermediate representation to a form suitable for both compression and subsequent FRC processing, enabling quality preservation while maintaining the compression advantages for power reduction.
2Manufacturing precision
If FRC process is performed to increase number of gray levels, then image quality is improved, but data size increases
Solution Approach 1:
The FRC process is performed preliminarily on the decompressed data before it reaches the display device. This preliminary action allows the FRC to operate on data that has already been optimized for transmission, achieving quality improvement without the full burden of processing complete original image data.
Solution Approach 2:
The patent applies FRC selectively and partially to the decompressed data representation rather than processing all original image data. This partial action achieves sufficient quality improvement for display while avoiding the excessive data processing that would occur if FRC were applied to the full original data set.
3Adaptability or versatility
If color reduction process is performed to match display device gray levels, then compatibility is improved, but data size reduction is limited
Solution Approach 1:
The patent changes the parameter representation through compression to achieve greater data size reduction than traditional color reduction. By transforming the data representation and utilizing the decompression-FRC pipeline, the system achieves both compatibility with limited gray-level display devices and significant data size reduction.
Data Source
AI summary
A display system includes: a display device, a transmitting device which generates compressed data by performing a compression process on image data corresponding to a display image, and a driver which drives the display device in response to the compressed data received from the transmitting device. The driver includes: a decompression circuit which generates decompressed data by decompressing the compressed data, an FRC circuit configured to perform an FEC process on the decompressed data to generate display data and a drive circuit which drives the display device in response to the display data. The following relation holds:m2>m3>m1,where m1 is a number of bits of the compressed data per pixel, m2 is a number of bits of the decompressed data per pixel and m3 is a number of bits of the display data per pixel.