Multi-color Display Device Fixed Compression Signal Conversion
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Solution Overview
Problem
Existing multi-color display devices face challenges in efficiently compressing and storing color image data, leading to increased memory capacity and signal processing load, particularly when transitioning between different color signals, and often result in image degradation due to variable compression rates and lack of synchronization with display operations.
Innovation Solution
A multi-color display device that includes an image memory, a display panel, and means for reading and converting compressed color signals into M types of color signals, allowing for reduced data transmission, memory capacity, and signal processing load, while maintaining image quality through a simplified circuit configuration and reduced power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If data compression is applied to reduce memory capacity, then memory capacity is reduced, but image quality may deteriorate due to variable compression rates
Solution Approach 1:
The patent applies fixed compression rates (1/2, 1/3, 1/4) instead of variable compression rates. This parameter change ensures consistent image quality while achieving significant memory capacity reduction. The fixed rates are applied through systematic pixel value mapping where multiple pixels are grouped and represented by a single pixel value, ensuring predictable compression outcomes without quality degradation.
Solution Approach 2:
The patent performs preliminary grouping of pixels into blocks before compression. By pre-organizing pixels into fixed-size blocks and determining representative pixel values in advance, the system ensures that compression does not degrade image quality. This preliminary action allows the compression to proceed systematically with guaranteed quality preservation.
2Loss of information
If conventional RGB signal transmission is used, then color accuracy is maintained, but data transmission amount and processing load increase
Solution Approach 1:
The patent merges multiple pixel data points into single representative values through compression. By grouping pixels and using a single pixel value to represent multiple pixels, the data transmission amount is significantly reduced while color accuracy is preserved through the systematic selection of representative pixel values that maintain the original image's color characteristics.
Solution Approach 2:
The patent changes the signal representation from individual pixel values to compressed block representations with fixed compression rates. This parameter change reduces the data transmission amount from N pixels to N/k pixels (where k is the compression rate denominator), while maintaining color accuracy through the careful selection of representative pixel values for each block.
3Productivity
If variable compression rates are used to optimize for different images, then compression efficiency is improved, but device complexity and synchronization issues increase
Solution Approach 1:
The patent applies different fixed compression rates (1/2, 1/3, 1/4) to different image regions or blocks, allowing optimization for local characteristics while maintaining overall system simplicity. This local application of fixed rates achieves good compression efficiency without requiring complex variable rate determination logic, thus reducing device complexity and synchronization overhead.
Data Source
AI summary
It is expected to increase the size of a display panel and the number of tones to be displayed on the display panel, and it is requested to use a display panel displaying M (M>3) types of colors. This requires a large memory capacity and makes a circuit for performing signal conversion complex due to an increase in the amount of data to be subjected to the signal conversion. An image memory stores image data compressed at a fixed compression rate, and the signal conversion is performed on the compressed image data. This technique reduces a memory capacity and simplifies a signal conversion circuit. The signal conversion makes it possible to improve color reproducibility of an image displayed and the quality of the image due to smoothing of the outline of the image. In the case of a display panel having sub-pixels displaying M types of colors, the signal conversion is performed on a compressed signal for each sub-pixel to improve the quality of an image.