Liquid Crystal Display Bit Depth Conversion Circuit
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Solution Overview
Problem
Existing liquid crystal displays face challenges in achieving high-speed response while minimizing memory usage and ensuring high-definition image display, as increasing the number of bits in image data leads to larger circuit sizes and increased costs.
Innovation Solution
A liquid crystal display system that includes a conversion circuit to reduce the number of bits in image data, a frame memory to store the converted data, a difference circuit to calculate pixel-level differences between frames, a correction circuit to adjust the data, and an adding circuit to enhance the image data, along with a lookup table to optimize memory usage and a reference power supply circuit to adjust gamma characteristics for improved response speed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If the number of bits in image data is increased to improve image quality, then manufacturing precision is improved, but device complexity and cost increase
Solution Approach 1:
The image data processing is segmented into multiple stages: initial conversion to intermediate precision, difference calculation, correction based on frame comparisons, and final addition. This segmentation allows the system to achieve high-definition output without maintaining high precision throughout the entire data path, thereby reducing circuit complexity.
Solution Approach 2:
The patent dynamically changes the precision parameter of image data during processing. Image data is converted to intermediate precision (fewer bits) for storage and processing, then corrected by adding difference data calculated from frame comparisons. This parameter change approach maintains final image quality while reducing the precision requirements for intermediate circuits.
2Manufacturing precision
If the number of bits in image data is increased to improve image quality, then manufacturing precision is improved, but loss of substance increases
Solution Approach 1:
The patent changes the bit depth parameter of stored image data from high precision to intermediate precision, significantly reducing memory requirements. The full precision is restored only at the final output stage through the addition of correction data, thus achieving high-definition display with reduced memory substance.
3Speed
If high-speed response driving is implemented, then speed is improved, but device complexity increases
Solution Approach 1:
The high-speed response circuit is segmented into specialized functional blocks: conversion circuit for bit reduction, difference circuit for frame comparison, correction circuit for data adjustment, and adding circuit for final synthesis. This segmentation allows each block to perform its function efficiently with simpler logic, achieving high speed without excessive overall complexity.
Data Source
AI summary
A liquid crystal display is provided, including a conversion circuit to convert a first image data to a second image data, a frame memory to store the second image data, a difference circuit to output in units of pixel a difference data between the second image data of the present frame to be converted and a third image data of an antecedent frame to be outputted from the frame memory, a correction circuit to correct the difference data based on one of the first to third image data, and an adding circuit to add the corrected difference data and the first image data.