Electroluminescence Display Aperture Ratio via Shared Circuit Regions
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Solution Overview
Problem
The challenge in electroluminescence displays is to enhance the aperture ratio to accommodate high-resolution displays while minimizing the area occupied by storage capacitors and wiring lines, which currently limits the efficiency and adaptability of these displays.
Innovation Solution
The electroluminescence display design includes sub-pixels with separate first and second circuit regions around the light emission region, allowing adjacent sub-pixels to share power supply and sensing lines, reducing the number of wiring lines and eliminating storage capacitors from these regions to improve the aperture ratio.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If storage capacitors and wiring lines are provided for each pixel to maintain constant current during light emission, then the electroluminescence display can achieve stable light emission, but the aperture ratio is reduced
Solution Approach 1:
Adjacent sub-pixels share common power supply lines and sensing lines, merging the wiring infrastructure across multiple pixels. This reduces the total number of wiring lines and storage capacitors needed, thereby increasing the aperture ratio while maintaining stable current supply through the shared infrastructure
Solution Approach 2:
The power supply lines and sensing lines serve multiple sub-pixels simultaneously, making them multi-functional. A single power supply line provides power to multiple sub-pixels, and a single sensing line performs sensing operations for multiple sub-pixels, reducing the overall component count and improving aperture ratio
2Manufacturing precision
If more wiring lines and storage capacitors are provided per pixel, then the current density control and light emission stability are improved, but the area occupied increases and adaptability to high-resolution displays decreases
Solution Approach 1:
The patent merges the wiring infrastructure by having adjacent sub-pixels share power supply lines and sensing lines. This reduction in wiring density enables the display to accommodate higher resolutions where pixel density is increased, as there is less wiring infrastructure competing for space with the light emission regions
Solution Approach 2:
The patent extends power supply lines and sensing lines across multiple rows and columns of sub-pixels, utilizing the two-dimensional array structure efficiently. By organizing the sharing pattern in both horizontal and vertical dimensions, the design achieves space efficiency that supports high-resolution configurations
Data Source
AI summary
An electroluminescence display includes a plurality of sub-pixels, each of the plurality of sub-pixels including a light emission region, and a first circuit region and a second circuit region disposed on respective sides of the light emission region. Power supply lines are configured to supply a first power to at least one of the second circuit regions of the sub-pixels arranged at odd-numbered row and the first circuit regions of the sub-pixels arranged at an even-numbered row. A sensing line is configured to supply an initialization voltage or a sensing voltage to at least one of the first circuit regions of the sub-pixels arranged at the odd-numbered row and the second circuit regions of the sub-pixels arranged in the even-numbered row.