Integrating De-interlace and Overdrive in LCD Systems
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Solution Overview
Problem
Existing LCD systems face challenges in integrating de-interlace and overdrive operations due to increased memory requirements with higher resolutions, making it difficult to combine de-interlace, frame scaling, and overdrive devices into a single chip while reducing memory and system costs.
Innovation Solution
A system and method that integrates de-interlace and overdrive operations by using a de-interlace device, first and second frame scaling controllers, and an overdrive device, which performs de-interlacing, vertical and horizontal scaling, and generates driving voltages based on pixel differences between frames, while optimizing memory usage by storing and processing frames efficiently.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of bits for representing gray level is reduced from 8-bit to 5-bit to reduce memory requirements, then the required DRAM size is reduced, but the system still requires two DRAMs and cannot be integrated into one chip
Solution Approach 1:
The patent combines two separate DRAMs into a single DRAM by integrating the de-interlace and overdrive operations. The de-interlace device and overdrive device share the same memory resource, allowing the system to use only one DRAM instead of two, while maintaining all necessary functions.
Solution Approach 2:
The single DRAM serves multiple functions: it stores data for both the de-interlace operation and the overdrive operation. The memory is used universally for both processing tasks, eliminating the need for separate dedicated memory resources for each function.
2Productivity
If two separate DRAMs are used for de-interlace and overdrive operations, then each device has sufficient memory bandwidth, but the system cannot be integrated into a single chip and system cost increases
Solution Approach 1:
The patent merges the memory resources of two separate DRAMs into a single shared DRAM. The de-interlace device and overdrive device both access the same memory through a unified interface, achieving system integration into one chip while maintaining adequate memory bandwidth for both operations.
Solution Approach 2:
The single DRAM is designed to serve universal purposes for both de-interlace and overdrive operations. The memory controller manages shared access to accommodate the bandwidth requirements of both devices, enabling single-chip integration.
3Measurement precision
If LCD resolution is increased to improve display quality, then the required memory size for storing frames increases, but this makes integration into a single chip more difficult
Solution Approach 1:
The patent combines the memory requirements for high-resolution display into a single shared DRAM. By merging the de-interlace and overdrive memory needs, the system can support high LCD resolution while using only one DRAM chip, making integration feasible.
Solution Approach 2:
The patent changes the memory organization and access parameters to accommodate high resolution displays. The single DRAM is configured with appropriate width and depth parameters, and the controller manages data access patterns to fit high-resolution frame storage within the constraints of a single memory chip.
Data Source
AI summary
A system for integrating de-interlace and overdrive operations includes a de-interlace device, a first frame scaling controller, a second frame scaling controller and an overdrive device. The de-interlace device performs a de-interlace operation on plural fields to thereby obtain plural frames. The first frame scaling controller receives a first frame among the plural frames and performs a vertical and horizontal scaling operation on the first frame to thereby produce a first display frame. The second frame scaling controller receives a second frame among the plural frames and performs a vertical and horizontal scaling operation on the second frame to thereby produce a second display frame. The overdrive device produces a driving voltage based on a difference between a pixel of the second display frame and a pixel of the first display frame corresponding to the pixel of the second display frame.