Display Panel Voltage Line Segmentation for Uniform Luminance
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Solution Overview
Problem
Display devices, particularly organic light emitting display devices, face challenges in achieving uniform luminance across the entire panel area, including camera areas, without the need for additional optical correction.
Innovation Solution
The display device is designed with separate high potential voltage lines for different active areas, including a first and second active area, where the first high potential voltage line supplies voltage to first pixels and the second high potential voltage line supplies a different voltage to second pixels, ensuring uniform luminance by dividing the active area and optimizing voltage distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single high potential voltage line is used for the entire active area, then the device structure is simple, but the luminance uniformity across the panel deteriorates
Solution Approach 1:
The active area is divided into first and second active areas with separate high potential voltage lines. The first high potential voltage line supplies voltage to first pixels in the first active area, while the second high potential voltage line supplies voltage to second pixels in the second active area. This segmentation allows independent voltage control to compensate for luminance differences in different regions, achieving uniform luminance across the entire panel.
2Illumination intensity
If additional optical correction is applied to achieve uniform luminance, then the luminance uniformity improves, but the device complexity and manufacturing cost increase
Solution Approach 1:
The patent replaces optical correction methods with an electrical solution. Instead of using additional optical components or layers to correct luminance uniformity, the invention uses separate high potential voltage lines to electrically control and compensate for luminance differences in different active areas, achieving the same effect without additional optical complexity.
3Illumination intensity
If the active area is divided into multiple sections with separate voltage lines, then the luminance uniformity improves, but the device complexity increases
Solution Approach 1:
Different high potential voltages are applied to different active areas based on their specific luminance characteristics. The first high potential voltage line and second high potential voltage line can supply different voltage levels to their respective active areas, allowing local optimization of luminance uniformity without affecting other regions.
Data Source
AI summary
A display device includes a substrate which includes an active area and a non-active area. The active area includes a first active area and a second active area. The display device further includes a first high potential voltage line that supplies a first high potential voltage to a plurality of first pixels in the first active area and a second high potential voltage line that supplies a second high potential voltage to a plurality of second pixels of the second active area. The first high potential voltage line and the second high potential voltage line are electrically isolated from each other. Therefore, sections of the active area are divided to separately dispose a high potential voltage line in a partial active area to uniformize the luminance in the entire panel area.