Display Device Driver Integration for Dead Space Reduction
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Solution Overview
Problem
Existing organic light emitting display devices have inefficiencies in space utilization due to the placement of scan and emission drivers, leading to significant dead space and potential brightness deviations between pixel areas.
Innovation Solution
A display device design with multiple pixel areas and corresponding peripheral areas, where scan and emission drivers are strategically placed to minimize dead space and adjust transistor sizes based on load differences between pixel areas, ensuring efficient signal distribution and uniform brightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If drivers are mounted without concern for space efficiency, then driver functionality is ensured, but dead space increases significantly
Solution Approach 1:
The scan driver and emission driver are merged into a single integrated driver structure that serves both pixel areas simultaneously. This integration allows the drivers to share common circuitry and space, reducing the total dead space while maintaining the functionality of driving multiple pixel areas with different transistor sizes.
2Ease of manufacture
If uniform driver placement is used across pixel areas, then manufacturing simplicity is maintained, but brightness deviations occur between pixel areas
Solution Approach 1:
The patent implements local quality by configuring different transistor sizes within the driver circuitry to match the specific requirements of different pixel areas. The driver includes first transistors with first sizes for driving first pixel area and second transistors with second sizes for driving second pixel area, ensuring each region receives appropriately scaled drive signals for uniform brightness.
3Productivity
If drivers are placed close to pixel areas, then signal distribution efficiency is improved, but dead space increases
Solution Approach 1:
The integrated driver structure performs multiple functions simultaneously: it drives both first and second pixel areas, provides different transistor size configurations for different regions, and reduces dead space through shared circuitry. This multi-functionality allows efficient signal distribution to multiple pixel areas without requiring separate dedicated drivers for each area.
Data Source
AI summary
A display device includes a substrate, first pixels, second pixels, and third pixels. The substrate has a first pixel area, a second pixel area, and a third pixel area. The first pixels are in the first pixel area and are connected to first scan lines and first emission control lines. The second pixels are in the second pixel area and are connected to second scan lines and second emission control lines. The third pixels are in the third pixel area and are connected to third scan lines and third emission control lines. The second scan lines are spaced apart from the third scan lines, and the second emission control lines are spaced apart from the third emission control lines.