Triangular Pixel Structure for OLED Light Mixing
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Solution Overview
Problem
Conventional OLED display pixel structures with parallel arrangements have poor light mixing effectiveness due to non-adjacent red and blue sub-pixels, leading to suboptimal image quality.
Innovation Solution
A pixel structure where each pixel unit includes sub-pixels with adjoining edges, with the green sub-pixel having a smaller area than red and blue sub-pixels, and the red and blue sub-pixels having equal areas, arranged to share adjoining edges, improving light mixing and correcting color shifts.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If sub-pixels are arranged in a traditional parallel rectangular pattern, then the structure is simple and easy to manufacture, but the light mixing effectiveness is poor and image quality deteriorates
Solution Approach 1:
The patent applies asymmetry by changing from a traditional symmetric rectangular arrangement to a triangular pixel structure where sub-pixels are positioned at vertices of an equilateral triangle. This asymmetric geometric configuration enables all three sub-pixels (red, green, blue) to be mutually adjacent, creating uniform light mixing in all directions and significantly improving light mixing effectiveness while maintaining manufacturing feasibility through standardized triangular patterns.
Solution Approach 2:
The patent transitions from a one-dimensional linear arrangement of sub-pixels to a two-dimensional triangular configuration. By positioning sub-pixels at the vertices of an equilateral triangle rather than in a straight line, the structure achieves radial light mixing in multiple directions simultaneously, enhancing light mixing effectiveness without complicating the manufacturing process.
2Manufacturing precision
If red and blue sub-pixels have larger areas than green sub-pixel, then color shift is corrected, but the pixel structure complexity increases
Solution Approach 1:
The patent applies local quality by assigning different areas to different sub-pixels based on their specific luminous characteristics. The green sub-pixel has a smaller area compared to the larger red and blue sub-pixels, creating non-uniform local properties within the pixel unit. This compensates for the different luminous efficiencies of each sub-pixel type, achieving color balance and reducing color shift while maintaining overall structural simplicity through a standardized triangular pattern.
Data Source
AI summary
The pixel structure includes a plurality of pixel units each including a first sub-pixel with a first color, having a first adjoining edge of a first length and a second adjoining edge of a second length; a second sub-pixel with a second color, having a first adjoining edge of the first length and a second adjoining edge of a third length; and a third sub-pixel with a third color, having a first adjoining edge of the second length and a second adjoining edge of the third length. In each pixel unit, the first adjoining edge of the first sub-pixel is adjoined to the first adjoining edge of the second sub-pixel, the second adjoining edge of the first sub-pixel is adjoined to the first adjoining edge of the third sub-pixel, and the second adjoining edge of the second sub-pixel is adjoined to the second adjoining edge of the third sub-pixel.