LCD Data Processing Apparatus Memory Bit Segmentation
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Liquid crystal display apparatuses experience image errors, such as vertical lines, due to the reduction of image data bits stored in frame memory, which affects gray scale revision and response time, especially at higher frame frequencies.
Innovation Solution
A data processing apparatus that includes a frame memory storing n−m bit image data of a previous frame, a memory interface generating n-bit revision data with fixed lower m bits, and revisers for color temperature and gray scale adjustments using interpolation and dithering to minimize bit differences and errors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of bits of stored image data in frame memory is reduced to decrease memory capacity, then memory capacity is decreased, but image errors such as vertical lines occur during gray scale revision
Solution Approach 1:
The image data bits are segmented into two groups: significant bits (upper n-m bits) that are stored in frame memory, and less significant bits (lower m bits) that are generated through fixed data. This segmentation allows the system to store only the most important data while reconstructing the remaining bits, thereby reducing memory capacity requirements while maintaining image quality and avoiding display errors.
Solution Approach 2:
The patent changes the parameter of bit representation by storing n-m bits instead of full n bits, and compensating for the remaining m bits through mathematical operations (interpolation and fixed data generation). This parameter change enables reduced memory capacity while maintaining the full n-bit image quality through computational reconstruction of the missing bits.
2Speed
If the difference between previous frame image data and current frame image data is large to improve response time through DCC process, then response time is improved, but image errors are exacerbated
Solution Approach 1:
The system performs preliminary generation of fixed data for the lower m bits before the DCC process. By pre-calculating and preparing the missing bit data through interpolation and fixed value assignment, the system ensures that when large frame differences occur during DCC, the reconstructed image data remains accurate, preventing display errors while maintaining fast response times.
Solution Approach 2:
The patent introduces an intermediary process that generates fixed data as a mediator between the stored n-m bit data and the final n-bit image output. This intermediary fixed data generation step ensures that even when large differences exist between frames requiring aggressive DCC processing, the reconstructed image maintains quality without displaying errors.
3Productivity
If frame image frequency is increased to improve productivity, then productivity is improved, but image errors are exacerbated
Solution Approach 1:
The system maintains continuous and accurate image data reconstruction by continuously generating fixed data for the lower m bits through interpolation and fixed value assignment. This continuous reconstruction process ensures that even at high frame rates where processing time is limited, the image data remains accurate and free from display errors, enabling high productivity without sacrificing image quality.
Data Source
AI summary
A data processing apparatus which revises n-bit image data, includes a frame memory which stores therein n−m bit image data of a previous frame; a memory interface which outputs n-bit revision data including upper n−m bits having n−m bit image data of the previous frame outputted by the frame memory and lower m bits having fixed data corresponding to a decimal value 1; a first reviser which revises a color temperature of current frame image data by using n-bit image data of a current frame and the revision data; and a second reviser which revises a gray scale of the current frame image data by using the image data outputted by the first reviser and the revision data.