Overdrive Apparatus for Display Scan Line Response Optimization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Display systems face challenges in providing different overdrive tables for varying response times of scan lines, particularly in applications like three-dimensional displays where the last scan line requires faster response times, leading to inefficient image updating and potential mixing of frames.
Innovation Solution
An overdrive apparatus and method that utilize a simple, low-cost, low-power hardware structure with multiple memories and an access circuit to provide distinct overdrive tables for different regions of an image frame, allowing for interpolation calculations to match response speeds of each scan line, thereby accommodating diverse timing requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single overdrive table is used for all scan lines, then device complexity is reduced, but response time cannot be optimized for different scan lines
Solution Approach 1:
The overdrive table is segmented into multiple regions (first region, second region, etc.) corresponding to different scan line groups. Each region contains overdrive values optimized for specific scan lines. This segmentation allows the system to provide region-specific overdrive compensation without requiring completely separate tables for each scan line, thus balancing complexity and performance optimization.
Solution Approach 2:
Different regions of the overdrive table provide different overdrive characteristics tailored to local needs of specific scan lines. The last scan line region has overdrive values optimized for fastest response, while earlier scan lines have progressively different values. This local quality approach ensures each scan line receives appropriate overdrive treatment without uniform complexity across the entire system.
2Speed
If multiple separate overdrive tables are provided for different scan lines, then response time is optimized, but device complexity and hardware cost increase
Solution Approach 1:
Multiple region-specific overdrive tables are merged into a single unified overdrive table structure. The table contains multiple regions that can be selectively accessed based on which scan line is being updated. This merging eliminates the need for multiple separate hardware memory structures while preserving the ability to provide optimized overdrive values for different scan line groups.
Solution Approach 2:
The single overdrive table serves multiple functions by containing region-specific overdrive data for different scan line groups. Rather than requiring dedicated tables for each scan line, this universal structure can adapt to provide appropriate overdrive values for any scan line by selecting the appropriate region, thus reducing hardware complexity while maintaining optimization capabilities.
3Measurement precision
If overdrive values are calculated for each scan line individually, then response time precision is improved, but calculation time and processing complexity increase
Solution Approach 1:
Overdrive values for different scan line regions are pre-calculated and stored in the respective regions of the overdrive table during manufacturing or system initialization. When the display system needs to update scan lines, it simply retrieves the pre-computed values from the appropriate region rather than calculating them in real-time. This preliminary action eliminates calculation time during operation while maintaining precise response time optimization for each scan line group.
Data Source
AI summary
An overdrive apparatus applied to a display system is provided. The overdrive apparatus includes an indication unit, an access circuit and a plurality of memories. The indication unit provides an indication signal corresponding to a scan line of an image frame. The access unit reads a first overdrive table from a first memory among the memories, and loads a second overdrive table to a second memory among the memories according to the indication signal. The first overdrive table and the second overdrive table respectively correspond to a first region and a second region of the image frame.