Display Pixel Layout With Dummy-Line Compensation for Luminance Uniformity
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Solution Overview
Problem
Display devices experience variations in luminance due to differences in load values between lines of varying lengths, leading to inconsistent image quality across different pixel regions.
Innovation Solution
A display device design incorporating a substrate with multiple pixel regions and peripheral regions, where a dummy part with a conductive pattern and connection line compensates for load value differences between lines, ensuring uniform luminance by applying a fixed voltage and using a power line connected to both pixel regions.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If lines of different lengths are used to connect pixels in different pixel regions, then the display device can accommodate varying pixel region sizes, but luminance uniformity deteriorates due to load value differences
Solution Approach 1:
The patent applies local quality by creating different pixel region sizes (first pixel region and second pixel region with smaller area) to adapt to varying display requirements, while simultaneously applying local compensation through dummy parts and connection lines with different configurations in different regions to maintain luminance uniformity across these varied areas
Solution Approach 2:
The patent changes electrical parameters by introducing dummy parts with specific capacitance values and connection lines with different lengths and configurations to compensate for load value differences. This allows the system to adapt line characteristics (capacitance, resistance) to maintain uniform luminance despite varying line lengths and pixel region sizes
2Illumination intensity
If dummy parts are added to compensate for load value differences, then luminance uniformity improves, but device complexity increases
Solution Approach 1:
The patent merges the dummy parts with existing pixel structures and connection lines, integrating compensation functionality into the existing circuit layout rather than adding completely separate components. The dummy parts are positioned to overlap with extension lines and are electrically connected through existing conductive patterns, reducing overall device complexity
Solution Approach 2:
The connection lines serve multiple functions: they electrically connect pixels to driving circuits and simultaneously provide capacitance compensation through their length and configuration. The dummy parts also serve dual purposes by providing capacitance compensation while occupying space that would otherwise be unused, thereby compensating for load differences without proportionally increasing complexity
Data Source
AI summary
A display device includes a substrate including a first pixel region, a second pixel region having an area smaller than that of the first pixel region, and a peripheral region surrounding the first pixel region and the second pixel region, a second pixel provided in the second pixel region, a second line connected to the second pixel, an extension line extended to the peripheral region, a dummy part located in the peripheral region to overlap with the extension line, a power line connected to the first and second pixel regions, and a connection line located in the peripheral region to be connected to the dummy part, the connection line being electrically connected to a portion of the second pixel region, wherein the second pixel region includes a first sub-pixel region connected to the connection line and a second sub-pixel region except the first sub-pixel region.