Electronic Paper Display Light Guide Plate with Patterned Surface
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Solution Overview
Problem
Conventional electronic paper displays fail to meet requirements of transmittance, contract, weight, thickness, and fabrication cost, and are not suitable for low illumination environments due to the need for a backlight and unsuitable input methods.
Innovation Solution
Integration of a front light guide module with a touch panel, featuring a light guide plate, conductive pattern structural layer, and a light source, where the light guide plate's patterned surface reflects or scatters light to the electronic paper panel, reducing the need for additional components like cover lenses, optical glue, and anti-glare films, thereby minimizing thickness, weight, and fabrication complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a conventional electronic paper display uses a front light guide module with separate cover lens, optical glue, and anti-glare films, then the display can function in low illumination environments, but the total thickness, weight, and fabrication cost increase
Solution Approach 1:
The patent merges the cover lens, anti-glare film, and light guide plate into a single integrated light guide plate structure. The light guide plate is designed with a patterned surface that simultaneously provides cover protection, anti-glare functionality, and light guiding capabilities, eliminating the need for separate layers and reducing total thickness
Solution Approach 2:
The light guide plate is designed to perform multiple functions simultaneously: it serves as the cover lens, provides anti-glare properties through its patterned surface, guides light from the light source, and protects the electronic paper panel. This multi-functional design reduces the number of components needed
2Reliability
If a conventional electronic paper display includes separate cover lens, optical glue, and anti-glare films, then the display structure is complete, but the weight and fabrication cost increase
Solution Approach 1:
The patent combines multiple functional layers into a single light guide plate, eliminating the weight of separate cover lenses, optical glue layers, and anti-glare films. The integrated structure maintains structural completeness while reducing total weight
Solution Approach 2:
The patent extracts and eliminates unnecessary intermediate layers such as optical glue and separate anti-glare films from the conventional multi-layer structure, keeping only the essential light guide plate with integrated functions
3Manufacturing precision
If a conventional electronic paper display uses multiple separate components (cover lens, optical glue, anti-glare films), then each component can be optimized independently, but the fabrication process becomes more complex and costly
Solution Approach 1:
The patent merges multiple manufacturing steps into a simplified process where the light guide plate is manufactured as a single integrated component with patterned surfaces, eliminating the need for separate assembly steps for cover lens, optical glue, and anti-glare film application
Solution Approach 2:
The light guide plate is designed with segmented functional zones including a light source receiving region, a patterned surface region, and a display region, allowing each zone to be optimized for its specific function while being manufactured as an integrated piece
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 reduces the total height, weight, and fabrication cost of electronic paper displays while enabling effective light distribution and touch input functionality, enhancing usability in various environments without the need for additional components like cover lenses and anti-glare films.
Implementation Method 1
the first surface of the light guide plate is a patterned surface, thereby a light generated by the light source is reflected or scattered to the electronic paper panel by the patterned surface
Implementation Method 2
the first surface of the light guide plate is a patterned surface, thereby a light generated by the light source is reflected or scattered to the electronic paper panel by the patterned surface
Data Source
AI summary
The disclosure provides an electronic paper display. The electronic paper display includes an electronic paper panel. A light guide plate is disposed on the electronic paper panel. The light guide plate has a first surface and a second surface opposite to the first surface. A conductive pattern structural layer is disposed on the light guide plate. A light source is disposed on a side of the light guide plate. The first surface of the light guide plate is a patterned surface. A light generated by the light source is reflected or scattered to the electronic paper panel by the patterned surface.