Display Scan Driver Segmentation Reduces Dead Space
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Solution Overview
Problem
Existing display devices with dummy scan lines and pixels increase dead space, affecting image quality and efficiency in organic light emitting displays.
Innovation Solution
A display device with a plurality of first and second pixels coupled to scan lines and data lines, where first scan drivers supply 2i or 2(i−1) first scan signals and second scan drivers supply i second scan signals, with timing controllers managing start signals to overlap scan signals and maintain pixel load, reducing the need for dummy lines and pixels.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If dummy scan lines and dummy pixels are added to control driving transistors, then image quality is retained, but dead space in the display increases
Solution Approach 1:
The scan lines are divided into two groups: first scan lines receiving 2i scan signals and second scan lines receiving i scan signals. This segmentation allows different regions to have different scan signal configurations, eliminating the need for uniform dummy scan lines across the entire display while maintaining image quality control where needed.
Solution Approach 2:
Different scan lines are assigned different numbers of scan signals based on their position and function. First scan lines receive 2i signals while second scan lines receive i signals, creating local variations in scan signal density that optimize both image quality and space utilization without requiring dummy lines throughout the display.
2Reliability
If multiple scan signals are supplied to scan lines during a frame period, then pixel load is maintained uniformly, but scan driver complexity increases
Solution Approach 1:
The scanning scheme transitions from a single-dimension approach (one scan signal per scan line) to a two-dimension approach by introducing multiple scan signals (2i or i signals) for different scan line groups within the same frame period. This dimensional expansion enables uniform pixel load maintenance while distributing the complexity across multiple coordinated scan drivers.
Solution Approach 2:
Scan signals are supplied in periodic cycles during the frame period, with first scan lines receiving 2i periodic scan signals and second scan lines receiving i periodic scan signals. This periodic action pattern maintains uniform pixel activation while allowing scan drivers to operate in a systematic, manageable sequence.
Data Source
AI summary
A display device includes a plurality of first pixels coupled to first scan lines and data lines and a plurality of second pixels coupled to second scan lines and the data lines. Each of the first scan lines receives 2i first scan signals during a frame period. Each of the second scan lines receives i second scan signals during the frame period, where i is a natural number.