Vertical Stacked Display Layers Area Compensation
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Solution Overview
Problem
The existing vertical structure of light-emitting layers for full-color displays results in variations in brightness of red, green, and blue colors due to unequal luminous efficiency and luminosity factors, leading to inconsistent color reproduction.
Innovation Solution
A display device design where the blue light-emitting layer has a greater light-emitting area than the red and green layers, with the red layer having a larger area than the green, ensuring equal luminance across colors by adjusting the light-emitting areas based on their respective luminous efficiencies and luminosity factors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Area of stationary object
If the light-emitting layers of R, G, and B are layered in the vertical direction, then the display device can be reduced in area, but a variation occurs in brightness of R, G, and B displayed on the display device
Solution Approach 1:
The patent applies local quality by making the light-emitting areas of different colored layers non-uniform and color-specific. The blue light-emitting layer has a larger light-emitting area than the red and green layers, which compensates for the lower luminous efficiency of blue LEDs, achieving uniform brightness across all colors in the vertical stacking structure
Solution Approach 2:
The patent changes the physical parameter of light-emitting area to compensate for differences in luminous efficiency among different colored light-emitting layers. By adjusting the area parameter rather than the material properties, the patent achieves brightness uniformity while maintaining the vertical stacking architecture
2Ease of manufacture
If equal light-emitting areas are used for R, G, and B layers, then manufacturing is simplified, but brightness balance deteriorates due to different luminous efficiencies
Solution Approach 1:
Instead of using uniform light-emitting areas for all layers, the patent implements local quality by assigning different light-emitting areas to different colored layers. The blue layer has a larger area to compensate for its lower luminous efficiency, while red and green layers have smaller areas, achieving brightness balance without complex manufacturing processes
Data Source
AI summary
A display device includes a blue light-emitting layer, a red light-emitting layer disposed so as to overlap the blue light-emitting layer, and a green light-emitting layer disposed so as to overlap the blue light-emitting layer. A light-emitting area of the blue light-emitting layer is greater than a light-emitting area of the red light-emitting layer, and the light-emitting area of the red light-emitting layer is greater than a light-emitting area of the green light-emitting layer.