Transparent Display Panel Asymmetric Pixel Diffraction
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Solution Overview
Problem
Display panels with light-passable and light-impassable elements arranged in pixel regions suffer from optical diffraction, leading to blurred images due to inadequate transmittance and positioning of transparent regions, which affects display quality.
Innovation Solution
A transparent display panel design featuring a substrate with a pixel array where each pixel region includes an opaque and a transparent region, with the transparent region occupying at least 50% of the pixel area and having a transmittance of 30% or higher, and varying in position along the axial direction to minimize optical diffraction.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If light-passable and light-impassable elements are periodically arranged in pixel regions, then the display panel can show images, but optical diffraction occurs causing images to become blurred
Solution Approach 1:
The patent applies asymmetry by making the transparent region occupy different relative positions in different pixel regions. Specifically, the transparent region is positioned at different locations (e.g., top-left, top-right, bottom-left, bottom-right corners or center) in different pixels, breaking the periodic symmetry that causes diffraction. This asymmetric arrangement prevents the formation of regular diffraction patterns while maintaining the light-passable function.
Solution Approach 2:
The patent applies local quality by varying the position of the transparent region within different pixel regions. Each pixel region has its transparent region positioned differently (at least three different relative positions along an axial direction), creating local variations that disrupt the overall periodicity. This local differentiation eliminates the harmful diffraction effect while preserving the display function.
2Illumination intensity
If the transparent region occupies a large area of the pixel region, then transmittance increases, but the positioning must be optimized to avoid diffraction
Solution Approach 1:
The patent maintains high transmittance by ensuring the transparent region occupies at least 50% of each pixel region area. Simultaneously, it prevents diffraction by positioning these large transparent regions at different asymmetric locations in different pixels, breaking the periodic arrangement that would cause diffraction despite the large area.
Solution Approach 2:
The patent changes the positional parameter of the transparent region across different pixel regions. By varying the relative position (at least three different positions along an axial direction) while maintaining the area parameter (≥50% of pixel region), the patent achieves both high transmittance and diffraction suppression.
3Illumination intensity
If the transparent region has high transmittance (≥30%), then light transmission is improved, but diffraction effects must be minimized through positioning
Solution Approach 1:
The patent achieves high light transmission by ensuring the transparent region has transmittance ≥30% and occupies ≥50% of the pixel region. Diffraction is prevented by positioning these high-transmittance regions at different asymmetric locations in different pixels, specifically at least three different relative positions along an axial direction, which breaks the periodicity required for diffraction.
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 design enhances display quality by maintaining high transmittance and spatial resolution, ensuring images remain clear and recognizable, even at distances greater than 40 cm, by effectively reducing optical diffraction and maintaining recognizable spatial resolution beyond 4 lp/mm.
Implementation Method 1
The transparent region has an area equivalent to at least 50% of the corresponding pixel region and a transmittance greater than or substantially equivalent to 30%
Implementation Method 2
When the light penetrates the light-passable elements between two pixel regions, the light will be diffracted and affect the display quality. The transparent region occupies a relative position in the corresponding pixel region, wherein at least three relative positions successively arranged along an axial direction are different
Data Source
AI summary
A transparent display panel includes a substrate and a pixel array. The pixel array is formed on the substrate and includes a plurality of data lines and a plurality of scan lines. The data lines and the scan lines surround a plurality of pixel regions. Each pixel region defines a transparent region and an opaque region, wherein each transparent region occupies a relative position in the corresponding pixel region and at least three relative positions successively arranged along an axial direction are different.