Display Panel Brightness Ratio Optimization
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Solution Overview
Problem
Current display devices face challenges in achieving a balance between high transmittance and contrast, which are crucial for enhancing display quality, particularly in liquid crystal display panels.
Innovation Solution
The design involves a display panel structure with specific electrode layers and reference lines that adjust light transmission through the active layer region, ensuring a ratio of brightness integral values between overlapping and non-overlapping sections greater than 0.4 but less than 1, thereby increasing front view transmittance while maintaining tolerable contrast.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the light transmission through the active layer region is increased to improve transmittance, then the transmittance is improved, but the contrast deteriorates
Solution Approach 1:
The patent applies local quality by creating different reference lines with different overlap characteristics with the semiconductor layer. The first reference line has a first section that overlaps with the semiconductor layer, while the second reference line has a second section that does not overlap. This local differentiation allows the patent to achieve different light transmission characteristics in different regions, thereby improving transmittance in the overlapping region while maintaining contrast in the non-overlapping region.
Solution Approach 2:
The patent changes the parameter of light transmission by adjusting the overlap between reference lines and the semiconductor layer. By controlling the brightness integral values to satisfy the ratio condition (0.4 < first brightness integral value / second brightness integral value < 1), the patent optimizes the light transmission characteristic to achieve both good transmittance and acceptable contrast.
2Reliability
If the brightness integral value ratio is adjusted to balance transmittance and contrast, then display quality is improved, but device complexity increases
Solution Approach 1:
The patent segments the reference line into two distinct sections: a first section that overlaps with the semiconductor layer and a second section that does not overlap. This segmentation allows independent optimization of light transmission and contrast characteristics in different segments, achieving improved display quality without requiring complex overall structural changes.
Solution Approach 2:
The patent introduces a dimensional approach by measuring brightness integral values along different paths (first reference line and second reference line) to evaluate and optimize light transmission. This dimensional measurement approach allows quantitative control of the brightness ratio to achieve the desired balance between transmittance and contrast.
Data Source
AI summary
A display device is disclosed, which comprises: a substrate; a semiconductor layer disposed on the substrate; a second electrode layer disposed over the semiconductor layer and comprising first data lines extending along a second direction; and plural pixel regions disposed between two adjacent first data lines. Herein, one pixel region has a first section and a second section substantially parallel to the second direction, respectively. The first section overlaps with the semiconductor layer, but the second section does not overlap therewith. When light passes through the display device, a ratio of a first brightness integral value obtained by measuring the first section to a second brightness integral value obtained by measuring the second section is greater than 0.4 and smaller than 1.