Reflective Display Light Guide Plate Uniform Illumination
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Solution Overview
Problem
Reflective display apparatuses, such as outdoor billboards, struggle to clearly show images at night due to insufficient ambient light, and existing solutions like wall washer lamps result in non-uniform light distribution causing bright and dark zones.
Innovation Solution
A reflective display apparatus comprising a reflective display panel, a light guide plate, an elastic ring, and a light permeable liquid, where the elastic ring spaces the display panel and light guide plate apart, allowing the light permeable liquid to ensure uniform light distribution and the holding device presses the elastic ring to prevent liquid leakage, enabling uniform light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a wall washer lamp is placed in front of the reflective display apparatus to emit light, then the image can be displayed in low ambient light conditions, but the light distribution becomes non-uniform causing significant bright zones and dark zones
Solution Approach 1:
A light guide plate is introduced as an intermediary component between the light source and the reflective display panel. The light guide plate receives light from the wall washer lamp and guides it to uniformly illuminate the reflective display panel, eliminating the non-uniform light distribution and bright/dark zones while maintaining display visibility in low ambient light conditions
Solution Approach 2:
The light guide plate creates different light transmission characteristics in different regions. By designing the light guide plate with specific optical properties at different locations, it ensures that light is distributed uniformly across the entire display panel surface, transforming the non-uniform light output from the wall washer lamp into uniform illumination
2Reliability
If the elastic ring is pressed by the holding device to prevent liquid leakage, then the sealing is improved, but the risk of damage to the display panel and light guide plate increases
Solution Approach 1:
The elastic ring serves as a cushioning element that is pre-installed between the light guide plate and the light source assembly. When the holding device applies pressure to secure the components, the elastic ring deforms to absorb the mechanical stress, preventing direct contact between rigid components that could cause damage to the display panel or light guide plate, while still maintaining effective sealing
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 ensures that images are clearly displayed even in low ambient light conditions by providing uniform light distribution and preventing damage to the display panel and light guide plate, while also allowing for easy replacement and buffer functionality.
Implementation Method 1
the light guide plate and the light permeable liquid allow the lights to travel into the reflective display panel uniformly
Implementation Method 2
The holding device holds the reflective display panel and the light guide plate, thereby pressing against the elastic ring and making the elastic ring deform
Data Source
AI summary
A reflective display apparatus includes a reflective display panel, a light guide plate, an elastic ring, a light permeable liquid and a holding device. The elastic ring is sandwiched between the reflective display panel and the light guide plate, and it spaces the reflective display panel and the light guide plate apart defines a space between the reflective display panel and the light guide plate. The light permeable liquid is located in the space. The holding device holds the reflective display panel and the light guide plate, thereby pressing against the elastic ring and making the elastic ring deform.