Unified Gamma and Phase Data Memory for CSTN Display Drivers
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Solution Overview
Problem
Existing passive color LCD systems face challenges in optimizing gamma curve correction and phase table data adaptation to achieve optimal gray scale images, particularly in CSTN displays, due to fixed assignments and non-linear optical responses, leading to issues like crosstalk and flicker.
Innovation Solution
A method and system that allow for the dynamic adaptation of gamma curve and phase table data in the same memory elements, using programmable RAM or registers, enabling flexible assignment of pulse width modulation and frame rate control values to optimize CSTN display drivers, eliminating unwanted artifacts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If gamma curve correction data and phase table data are stored in separate memory elements with fixed assignments, then the display system maintains simple memory architecture, but the display quality deteriorates due to non-linear optical responses causing crosstalk and flicker artifacts
Solution Approach 1:
The patent combines gamma curve correction data and phase table data into the same memory element (frame memory), allowing dynamic and flexible assignment of data to memory locations. This merging enables optimal adaptation of display parameters while maintaining a simple memory architecture without requiring separate dedicated memory elements for each data type.
Solution Approach 2:
The patent implements dynamic assignment where gamma curve correction data and phase table data can be flexibly mapped to different memory locations based on optimal display requirements. The system allows runtime adjustment of data placement within the frame memory, enabling adaptation to different display conditions and optimizing gray scale linearity while maintaining architectural simplicity.
2Adaptability or versatility
If fixed assignment of gamma and phase table data is used in memory, then the memory system remains simple and fast, but adaptability to optimize display characteristics is limited
Solution Approach 1:
The patent introduces dynamic data assignment within the frame memory, allowing gamma curve correction data and phase table data to be flexibly mapped to different memory locations based on optimal display requirements. This dynamic capability enables adaptation to different display characteristics and optimization conditions without requiring complex external control systems.
Solution Approach 2:
The frame memory is designed to serve multiple functions: storing both gamma curve correction data and phase table data, and allowing flexible assignment of either data type to any memory location. This multi-functionality enables the same memory structure to adapt to different display optimization scenarios without requiring specialized memory elements for each function.
3Productivity
If separate dedicated memory elements are used for gamma curve and phase table data, then data access is simplified, but the overall system complexity and memory resource usage increase
Solution Approach 1:
The patent merges gamma curve correction data and phase table data into the same frame memory structure, eliminating the need for separate dedicated memory elements. This consolidation reduces total memory resource usage while maintaining efficient data access through the unified memory architecture, which allows flexible assignment and retrieval of either data type as needed.
Data Source
AI summary
Methods and systems to optimize the adaptation of gamma curve and phase table data to a color LCD STN display anytime by storing these data in a same memory are disclosed. The gamma curve and phase table data are stored in a same read/write memory element; hence allowing the adaptation any time.