LCD Driving Method Using Approximation to Reduce Memory and Heat
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Solution Overview
Problem
Liquid crystal display devices suffer from slow response speed, leading to motion blurring and reduced picture quality due to their inherent viscosity and elasticity characteristics, and existing high-speed driving methods increase heat generation and memory requirements.
Innovation Solution
A method and apparatus that determine first modulated data, store them in a timing controller, and calculate second modulated data through approximation between present and previous frame data, reducing memory capacity and heat generation by using a linear approximate formula to display the modulated data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If high-speed driving method with look-up table is used to modulate data, then response speed is improved and motion blurring is reduced, but heat generation increases and operational reliability deteriorates
Solution Approach 1:
The patent extracts only the essential modulated data values needed for high-speed driving from the complete look-up table, storing them in a compact memory structure. This reduces the memory capacity and associated heat generation while maintaining the core functionality of data modulation for improved response speed.
Solution Approach 2:
The patent changes the parameter of memory capacity by implementing a simplified data structure that stores only critical modulated data values rather than a complete look-up table. This parameter change reduces heat generation and improves operational reliability while preserving the response speed benefits through selective data modulation.
2Speed
If high-speed driving method with look-up table is used to modulate data, then response speed is improved and motion blurring is reduced, but memory capacity and heat generation increase
Solution Approach 1:
The patent extracts and stores only the essential modulated data values in a compact memory structure, eliminating the need for a large complete look-up table. This extraction approach maintains the data modulation capability for high-speed response while significantly reducing memory capacity requirements and associated heat generation.
Solution Approach 2:
The patent employs a simplified, compact memory structure that uses less capacity compared to a complete look-up table. This approach trades off storing all possible modulated data values with storing only the essential ones needed for high-speed driving, reducing memory capacity and heat generation.
3Manufacturing precision
If data is not modulated to reach desired brightness within frame period, then picture quality deteriorates with motion blurring, but heat generation and memory requirements increase with modulation
Solution Approach 1:
The patent extracts and stores only the critical modulated data values needed to achieve desired brightness levels within the frame period. This selective storage approach enables effective data modulation for improved picture quality while minimizing memory capacity and reducing heat generation compared to storing a complete look-up table.
Data Source
AI summary
A driving method and a driving apparatus for a liquid crystal display device is provided. A first modulated data of a designated distance is determined and stored in a timing controller. An area existing between the first modulated data is judged using the present frame data and the previous frame data, and a second modulated data is calculated through an approximation in the area to display at least one of the first modulated data and the second modulated data.