Reflection Display Module Light Guide Plate Glare Reduction
Solution Overview
Problem
Current reflection type display modules face challenges in achieving optimal light transmission and glare protection while maintaining a smooth touch interface and high display quality, particularly in electronic devices like electronic books.
Innovation Solution
The implementation of a reflection type display module with a light guide plate, a light source positioned adjacent to it, and a hardened layer that covers the light guide plate's surface away from the touch panel, featuring reflection protrusions and a masking layer to enhance light distribution and anti-glare effects, along with a touch panel and display panel configuration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate is added to improve light distribution, then illumination uniformity is improved, but device complexity increases
Solution Approach 1:
The patent combines the light guide plate with the touch panel into a single integrated component. The light guide plate is positioned between the touch panel and display panel, sharing the same structural space and serving dual functions: optical guidance and touch sensing support. This merging reduces the number of separate components while maintaining effective light distribution across the display area.
Solution Approach 2:
The light guide plate structure is designed to perform multiple functions simultaneously: it guides and distributes light from the edge-mounted light source across the display area, provides structural support for the touch panel, and contributes to the overall protective layering of the display module. This multi-functionality reduces device complexity by eliminating the need for separate components for each function.
2Reliability
If a hardened layer is added to protect the light guide plate, then reliability is improved, but light transmission is reduced
Solution Approach 1:
The hardened layer undergoes specific parameter optimization in terms of thickness and material composition to balance protection and light transmission. The layer is designed with controlled thickness parameters that provide sufficient mechanical hardness and damage protection while maintaining adequate light transmittance for the reflection type display to function effectively.
Solution Approach 2:
The hardened layer is constructed using composite material formulations that combine protective properties with optical transparency. The material composition is engineered to provide hardness and damage resistance while allowing sufficient light passage, resolving the contradiction between protection and light transmission requirements.
3Object-affected harmful factors
If reflection protrusions are added to reduce glare, then visual comfort is improved, but manufacturing precision requirements increase
Solution Approach 1:
The reflection protrusions are strategically positioned and dimensioned with specific local characteristics optimized for glare reduction. The protrusions have controlled height, spacing, and distribution patterns that are tailored to the specific glare problems of the display, providing effective anti-glare functionality while using manufacturable dimensional parameters.
Solution Approach 2:
The reflection protrusions are designed with simplified geometries and standardizable dimensions that can be efficiently manufactured using cost-effective processes. The protrusion design prioritizes functional effectiveness in glare reduction over excessive precision, enabling practical manufacturing at reasonable cost and complexity levels.
4Illumination intensity
If multiple layers are stacked to improve display quality, then display quality is improved, but ease of operation is reduced
Solution Approach 1:
The display module is segmented into distinct functional layers (protective plate, touch panel, display panel, light guide plate) with clear interface definitions. This segmentation allows each layer to be optimized for its specific function while maintaining overall system performance, with the touch panel specifically designed to remain the primary interaction interface despite the presence of multiple overhead layers.
Solution Approach 2:
The touch panel serves as an intermediary layer between the user's finger and the display panel, maintaining direct touch responsiveness. The light guide plate positioned between the touch panel and display panel is designed with optical properties that allow touch forces and gestures to pass through effectively to the display panel while providing necessary light guidance functions, thus mediating between touch operation and display output.
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 ensures high transmittance and low haze for improved display quality, reduces glare, and provides enhanced protection against damage while maintaining smooth touch functionality.
Implementation Method 1
a light guide plate, a light source positioned adjacent to it
Implementation Method 2
reflection protrusions and a masking layer to enhance light distribution
Implementation Method 3
a hardened layer that covers the light guide plate's surface away from the touch panel
Implementation Method 4
reflection protrusions and a masking layer to enhance light distribution and anti-glare effects
Data Source
AI summary
An electronic device includes a housing and a display module received in the housing. The display module includes a display panel, a touch panel positioned on the display panel, a light guide plate positioned on the touch panel, a light source positioned at a side of the light guide plate, and a hardened layer positioned on the light guide plate. The light guide plate and the display panel are respectively positioned at opposite sides of the touch panel. The hardened layer covers a surface of the light guide plate away from the touch panel.