Display Panel Metal Grid Patterns for Ambient Light Blocking
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Solution Overview
Problem
Display devices face challenges in outdoor environments due to ambient light interference, particularly from reflection and scattering, which affect the display's optical efficiency and color balance.
Innovation Solution
A display panel design incorporating a first display substrate, a second display substrate with metal grid patterns and a color conversion layer, and an in-cell polarization layer to block or convert ambient light, specifically using metal grid patterns and wire grid patterns to manage light interaction and prevent adverse effects on the display.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a polarizing member with polarizer and phase retardation layer is used to block ambient light, then outdoor visibility is improved, but device complexity and manufacturing difficulty increase
Solution Approach 1:
The patent extracts and eliminates the complex polarizing member structure (polarizer and phase retardation layer) from the display device. Instead, it uses a simplified approach with a black matrix and metal grid pattern on the substrate that directly blocks ambient light without requiring additional polarizing components, thereby reducing device complexity while maintaining outdoor visibility
Solution Approach 2:
The patent replaces expensive and complex polarizing members with a simpler, more cost-effective structure consisting of a black matrix and metal grid pattern formed during the standard manufacturing process. This simpler structure achieves the same ambient light blocking function without the need for additional specialized components
2Object-affected harmful factors
If metal grid patterns are added to block ambient light, then optical efficiency is improved, but manufacturing precision requirements increase
Solution Approach 1:
The patent merges the ambient light blocking function with the existing substrate structure by integrating the metal grid pattern directly into the substrate during the manufacturing process. This combination eliminates the need for separate precision alignment of additional layers, as the metal grid is formed as part of the substrate itself, thereby reducing manufacturing precision requirements while still achieving effective light blocking
3Productivity
If the color conversion layer is exposed to ambient light, then color conversion efficiency decreases, but removing the layer reduces display functionality
Solution Approach 1:
The patent applies preliminary anti-action by placing the black matrix and metal grid pattern between the ambient light source and the color conversion layer. This pre-blocks harmful ambient light before it can reach and interfere with the color conversion layer, protecting the layer's efficiency while allowing the layer to remain in place and perform its essential color conversion function
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 effectively reduces ambient light interaction with the color conversion layer, enhancing optical efficiency and maintaining color balance, thereby improving the display's performance in outdoor conditions.
Implementation Method 1
a metal layer having metal grid patterns disposed on the base substrate to block a fraction of an externally incident light in the specific wavelength range
Implementation Method 2
a first conversion part including a first luminous body configured to absorb the first color light and emit a second color light
Implementation Method 3
a first luminous body configured to absorb the first color light and emit a second color light
Implementation Method 4
an in-cell polarization layer including wire grid patterns disposed between the liquid crystal layer and the color conversion layer
Data Source
AI summary
A display device including a display panel and a light source to irradiate to the display panel a first color light having a peak wavelength within a specific wavelength range. The display panel includes a first display substrate, a second display substrate facing the first display substrate and including a base substrate, a metal layer, which includes metal grid patterns disposed on the base substrate, and a color conversion layer, which is disposed on the base substrate to cover the metal grid patterns, and a liquid crystal layer provided between the first and second display substrates. The metal grid patterns are configured to block a fraction of an ambient incident light that is in a specific wavelength range, and a peak wavelength of the first color light is within the specific wavelength range.