Grate-like Structure Electrode for Liquid Crystal Display Light Control
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Solution Overview
Problem
The existing display apparatuses are structurally complex and suffer from light leakage in the dark state due to the proximity of the grating to the light guide plate, which complicates the overall structure and affects light control efficiency.
Innovation Solution
A display apparatus with a grate-like structure that functions as both a grating and an electrode to control the refractive index of the liquid crystal layer, positioned on the side of the light-transmitting substrate away from the light guide plate, simplifying the structure and preventing light leakage by reusing the grate-like structure for both functions without separate electrode assemblies and gratings.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a separate grating and electrode assembly are used, then light control precision is improved, but device complexity increases
Solution Approach 1:
The patent combines the grating and electrode assembly into a single integrated structure. The electrode assembly is designed with a grating pattern, allowing it to function simultaneously as both an electrode for controlling liquid crystal refractive index and a grating for diffracting light. This merging eliminates the need for separate components while maintaining both light control precision and structural simplicity.
Solution Approach 2:
The electrode assembly is designed to perform multiple functions: it serves as an electrode to control the refractive index of the liquid crystal layer and simultaneously acts as a grating to diffract light. This multi-functional design reduces the number of components needed in the display apparatus while maintaining effective light control.
2Productivity
If the grating is positioned close to the light guide plate, then light control efficiency is improved, but light leakage in dark state occurs
Solution Approach 1:
The liquid crystal layer serves as an intermediary between the light guide plate and the grating electrode assembly. By controlling the refractive index of the liquid crystal layer through the electrode assembly, the system can prevent light leakage in the dark state while maintaining efficient light control when activated. The liquid crystal layer acts as a controllable medium that mediates between the light source and the grating structure.
3Measurement precision
If separate electrode assemblies are used on both sides of the liquid crystal layer, then light control precision is improved, but manufacturing complexity increases
Solution Approach 1:
The patent merges the grating structure with one of the electrode assemblies, eliminating the need for separate electrode assemblies on both sides of the liquid crystal layer. The integrated grating electrode assembly maintains light control precision while significantly reducing manufacturing complexity by reducing the number of components that need to be assembled and aligned.
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
This configuration simplifies the display apparatus structure and prevents light leakage in the dark state, enhancing light control efficiency and overall performance.
Implementation Method 1
Two electrode assemblies are configured to control a refractive index of the liquid crystal layer such that light from the edge-type backlight source may be emitted into the liquid crystal layer
Implementation Method 2
the grating is configured to adjust an angle of the light emitted into the liquid crystal layer such that the light may be emitted out of the display apparatus through the light-transmitting substrate
Data Source
AI summary
Disclosed are a display apparatus and a control method thereof. The display apparatus includes a light-transmitting substrate, a backlight source, a liquid crystal layer and a grate-like structure. The liquid crystal layer is disposed between the light-transmitting substrate and the backlight source. The grate-like structure is disposed on a side of the light-transmitting substrate proximal to the liquid crystal layer. The grate-like structure is reused as both an electrode configured to control an equivalent refractive index of the liquid crystal layer and a grating. The backlight source includes a light guide plate and a collimated light source which is disposed on a side of the light guide plate. The grate-like structure is disposed on a side of the liquid crystal layer distal from the light guide plate and reused as both an electrode configured to control the refractive index of the liquid crystal and a grating.