Electrochromic Layer and Spacer for Display Panel Light Leakage
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Solution Overview
Problem
Current electronic display products experience light leakage during dark-state displays, leading to reduced contrast and inadequate brightness, which affects the visual experience due to incomplete light blocking by liquid crystals.
Innovation Solution
A display panel design incorporating a spacer layer between the liquid crystal layer and the first substrate, and an electrochromic layer between the first substrate and the spacer layer, which absorbs incident light and prevents ion intrusion, thereby enhancing contrast and display performance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If only liquid crystal layer is used for light blocking, then device complexity is low, but light leakage occurs and contrast is insufficient
Solution Approach 1:
The light blocking function is segmented between the liquid crystal layer and the electrochromic layer. The liquid crystal layer handles primary light modulation while the electrochromic layer provides additional light absorption, particularly for wavelengths where liquid crystals are less effective. This segmentation enables comprehensive light blocking without requiring a single complex layer.
Solution Approach 2:
The patent employs a composite structure combining liquid crystal material and electrochromic material in separate layers. These materials have complementary light-blocking mechanisms: liquid crystals use molecular orientation to control light passage, while electrochromic materials use electrochemical reactions to change optical properties. The composite approach achieves superior light blocking performance compared to either material alone.
2Illumination intensity
If electrochromic layer is added to block light, then contrast is improved, but device complexity increases
Solution Approach 1:
The electrochromic layer serves multiple functions: it absorbs incident light to enhance contrast, prevents ion intrusion from the liquid crystal layer, and can be integrated with existing liquid crystal display structures. This multi-functionality justifies the added complexity by delivering multiple performance benefits from a single layer addition.
Solution Approach 2:
The spacer layer acts as an intermediary between the liquid crystal layer and the electrochromic layer. It physically separates these two functional layers while maintaining their operational independence, preventing direct interaction that could cause ion contamination. This intermediary structure enables the integration of multiple functional layers without compromising system reliability.
3Reliability
If liquid crystal layer directly contacts first substrate, then manufacturing is simple, but ions can intrude and reduce display yield
Solution Approach 1:
The spacer layer serves as a protective intermediary between the liquid crystal layer and the electrochromic layer. It prevents ion intrusion from the liquid crystal layer into the electrochromic layer, which would otherwise degrade display performance and reduce yield. This protective barrier is integrated into the manufacturing process without significantly complicating production.
Solution Approach 2:
The spacer layer is formed beforehand during the manufacturing process, creating a protective barrier before the liquid crystal layer is fully assembled. This prior cushioning prevents ion contamination issues before they can occur during device operation, thereby improving display yield without requiring complex post-manufacturing corrections.
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 blocks light leakage and improves contrast by utilizing the electrochromic layer to absorb light during dark-state displays, while the spacer layer protects the liquid crystal layer, resulting in enhanced display yield and visual experience.
Implementation Method 1
the electrochromic layer to absorb light during dark-state displays
Data Source
AI summary
Embodiments of the present disclosure provide a display panel, a manufacturing method thereof and a display device. The display panel includes: a first substrate and a second substrate which are cell-assembled; a liquid crystal layer, disposed between the first substrate and the second substrate; a spacer layer, disposed between the liquid crystal layer and the first substrate; and an electrochromic layer, disposed between the first substrate and the spacer layer.