Dynamic Capacitance Compensation Memory Segmentation
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Solution Overview
Problem
Liquid crystal displays (LCDs) face a slow response time, leading to blurring due to the time delay in expressing pixel values, which is exacerbated by the need for multiple memories to perform dynamic capacitance compensation (DCC), and existing compression methods compromise image quality.
Innovation Solution
A DCC apparatus and method that encodes and decodes image data in line units by dividing pixel values into one-dimensional blocks, transforming, quantizing, and generating bit streams, allowing for efficient storage and compensation without the need for separate writing and reading memories, using a one-dimensional block-encoding unit, memory, one-dimensional block-decoding unit, and compensation pixel value-detecting unit.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If pixel values of the previous frame are stored without compression in separate writing and reading memories to perform DCC, then the DCC can be performed smoothly, but the device complexity and memory requirements increase
Solution Approach 1:
The patent combines the writing memory and reading memory into a single memory structure. The memory is divided into a first memory region for storing current frame pixel values and a second memory region for storing previous frame pixel values, eliminating the need for separate writing and reading memories while maintaining smooth DCC operation.
Solution Approach 2:
The single memory is segmented into different regions (first memory region and second memory region) with different access characteristics. The first region allows random access for current frame data, while the second region is optimized for sequential access of previous frame data, reducing overall memory requirements while maintaining DCC performance.
2Quantity of substance
If color sampling compression method is used to compress pixel values of the previous frame, then the memory burden is reduced, but the image quality deteriorates due to color changes and poor compression efficiency
Solution Approach 1:
The patent changes the compression approach from color space conversion (YcbCr) to spatial block-based compression. By dividing the image into blocks and using differential encoding (storing only changes from the previous block), the system achieves better compression efficiency without color distortion, maintaining image quality while reducing memory burden.
3Productivity
If independent writing and reading memories are installed to store uncompressed pixel values, then the DCC can be performed smoothly, but the device complexity increases
Solution Approach 1:
The patent merges the writing memory and reading memory into a single unified memory structure with different access regions. This maintains the high productivity of DCC processing by allowing simultaneous write and read operations through different memory regions, while reducing device complexity by eliminating the need for completely separate memory systems.
Data Source
AI summary
A dynamic capacitance compensation (DCC) apparatus and method for a liquid crystal display (LCD). The apparatus includes a one-dimensional block-encoding unit reading pixel values of an image in line units, dividing the pixel values of the read image into one-dimensional blocks in predetermined pixel units, transforming and quantizing the one-dimensional blocks, and generating bit streams; a memory storing the generated bit streams; a one-dimensional block-decoding unit which decodes the bit streams stored in the memory by inverse quantization and inverse transform; and a compensation pixel value-detecting unit detecting a compensation pixel value for each pixel based on a difference between each pixel value of a current frame and each pixel value of a previous frame decoded by the one-dimensional block-decoding unit.