Transparent Display Panel Layout for Through-Hole Phase Control
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Solution Overview
Problem
The existing display panels with transparent areas suffer from diffraction and phase differences due to varying refractive indexes between through-hole areas and material transparent areas, leading to blurred displays and reduced light intensity.
Innovation Solution
A display panel design incorporating a composite functional layer with a light-shielding layer surrounding a through-hole in the transparent area, which shields the light-transmitting part and prevents phase differences, along with a specific layer stacking and etching process to control the through-hole dimensions and angles, ensuring improved light transmittance and display clarity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a through-hole is provided in the transparent area to increase light transmittance, then light transmittance is improved, but phase differences and diffraction occur due to varying refractive indexes between through-hole areas and material transparent areas, leading to blurred display
Solution Approach 1:
The patent applies local quality by providing a light-shielding layer specifically at the peripheral portion of the through-hole, rather than uniformly across the entire transparent area. This localized treatment addresses the refraction issue only where it occurs (at the edges of the through-hole) while maintaining high light transmittance in the central area. The light-shielding layer has a specific refractive index matched to the transparent area, creating a gradual transition that eliminates sudden refraction at the through-hole boundary.
Solution Approach 2:
The light-shielding layer acts as an intermediary between the through-hole area and the surrounding transparent area. It serves as a refractive index transition zone that mediates the optical path difference between light passing through the through-hole and light passing through the transparent material, thereby eliminating the phase difference and diffraction effects without blocking the light entirely.
2Manufacturing precision
If a light-shielding layer is added to prevent phase differences, then display clarity is improved, but the structure complexity increases
Solution Approach 1:
The patent merges the light-shielding layer with existing functional layers in the display panel structure. Rather than adding a completely separate component, the light-shielding layer is integrated into the stack of transparent functional layers, combining multiple functions (light shielding, structural support, and optical path management) into a single integrated layer that reduces overall device complexity.
Solution Approach 2:
The light-shielding layer is segmented to be provided only at the peripheral portion of the through-hole rather than covering the entire through-hole area. This segmentation approach minimizes the amount of additional material and structure required, reducing device complexity while still achieving the desired optical effect of preventing phase differences at the critical edge regions.
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 enhances display clarity by preventing phase differences and maintaining high light transmittance, resulting in a sharper and more effective display panel performance.
Implementation Method 1
a light-shielding layer, an orthographic projection of the light-shielding layer on the base substrate covering an orthographic projection of at least a portion of the light-transmitting part on the base substrate
Data Source
AI summary
A display panel and a display device are provided. The display panel includes a plurality of display units, each display unit includes a transparent area, and the display panel further includes a base substrate and a composite functional layer. The composite functional layer is provided on a side of the base substrate and has a first through-hole formed therein, and the first through-hole is provided in the transparent area. The composite functional layer includes a composite transparent layer and a light-shielding layer. The composite transparent layer includes a plurality of transparent functional layers, and includes a light-transmitting part surrounding the first through-hole. An orthographic projection of the light-shielding layer on the base substrate covers an orthographic projection of at least a portion of the light-transmitting part on the base substrate.