Transparent Display Pixel Layout to Reduce Edge Diffraction Haze
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Solution Overview
Problem
Transparent display devices in the related art suffer from diffraction and haze at the edges due to the rectangular transparent part's unequal width and height ratios, reducing sharpness and visibility.
Innovation Solution
A display device with a pixel part having sub-pixels arranged in extension parts forming a cross or pinwheel shape, featuring a mesh structure for power lines and a 1:1 aspect ratio for the transparent part, eliminating the black matrix on white sub-pixels to minimize diffraction and haze.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a rectangular transparent part is used in the display device, then the manufacturing process is simple, but diffraction occurs at edges due to unequal width-to-height ratio, causing haze and reduced sharpness
Solution Approach 1:
The patent applies asymmetry by changing the transparent part shape from a standard rectangle to a square configuration where width equals height. This specific symmetric form (square) actually eliminates the asymmetric diffraction problem caused by rectangular proportions, creating uniform light transmission edges that prevent haze while remaining manufacturable.
Solution Approach 2:
The patent changes the geometric parameter of the transparent part from a rectangular proportion (unequal width-to-height ratio) to a square proportion (1:1 width-to-height ratio). This parameter change eliminates edge diffraction and haze, improving sharpness without significantly complicating the manufacturing process.
2Manufacturing precision
If the transparent part has a square shape with 1:1 width-to-height ratio, then diffraction and haze are reduced, but the circuit layout and wiring become more complex
Solution Approach 1:
The patent uses symmetry (square shape) to eliminate diffraction, and compensates for the resulting layout challenges by applying asymmetric positioning of circuit elements within the square framework. This allows optimal placement of pixels and circuitry while maintaining the beneficial square geometry.
Solution Approach 2:
The patent resolves layout complexity by utilizing the vertical dimension more effectively, arranging circuit elements and wiring in multiple layers and directions within the square transparent part. This dimensional approach distributes the complexity across different spatial planes rather than confining it to a single plane.
3Manufacturing precision
If extension parts are added to create a cross or pinwheel shape, then the transparent part achieves a square shape reducing diffraction, but the device structure becomes more complex
Solution Approach 1:
The patent segments the pixel array into four distinct extension parts (quarters) arranged in a cross or pinwheel configuration. Each segment contains a portion of the pixels and associated circuitry, allowing independent optimization and simplifying the overall design while achieving the square shape that reduces diffraction.
Solution Approach 2:
The patent merges the four extension parts at their boundaries to form the complete square transparent part. This merging creates the diffraction-reducing square shape while allowing each extension part to be designed and manufactured as a modular unit, balancing structural complexity with optical performance.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The solution reduces diffraction and haze at the edges, improving sharpness and visibility by maintaining a 1:1 aspect ratio and optimizing the arrangement of power lines, enhancing the overall clarity of the display.
Implementation Method 1
An organic light emitting display device displays an image by using an organic light emitting diode that generates light by recombination of electrons and holes
Implementation Method 2
at least one transparent part arranged in an area adjacent to the pixel part and passing external light therethrough
Data Source
AI summary
A display device includes: a pixel part in which sub-pixels are arranged, and at least one transparent part arranged in an area adjacent to the pixel part and passing external light therethrough, wherein the pixel part may be provided with first to fourth extension parts extending in directions different from each other and having shapes and configurations substantially similar to each other, the pixel part having a shape of a cross or pinwheel, and the sub-pixels may be arranged in the first to fourth extension parts, respectively.