Light Guide Plate Micro Structures for Reflective LCD Brightness
Solution Overview
Problem
Reflective liquid crystal display devices struggle to maintain effective display in low ambient light conditions, particularly in dark environments, as they rely on ambient light for operation.
Innovation Solution
A light source module comprising a light guide plate with micro structures and a light source, which provides an area light source to enhance light extraction and brightness, allowing the reflective liquid crystal display panel to function effectively even without ambient light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective liquid crystal display device is used, then outdoor display effect under high ambient light is improved, but display effect in dark environment deteriorates
Solution Approach 1:
The patent introduces a light guide plate as an intermediary component between the light source and the reflective liquid crystal display panel. The light guide plate converts point light from the light source into area light through its micro structures, providing uniform illumination that enables the reflective display to function in dark environments while maintaining compatibility with outdoor high ambient light conditions
2Illumination intensity
If a point light source is used with reflective liquid crystal display panel, then device structure is simple, but light exiting brightness is insufficient
Solution Approach 1:
The patent changes the light distribution parameters by introducing micro structures (protrusions or recesses) on the light guide plate surface. These micro structures modify the light propagation path and extraction characteristics, transforming concentrated point light into distributed area light without adding complex mechanical components
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 enables improved display performance in dark environments by diffusely reflecting light from the light guide plate, ensuring consistent brightness and display quality.
Implementation Method 1
When light emitted out from the light source enters the light guide plate and is transmitted into the micro structures, diffuse reflection occurs to result in change of a transmission direction of light such that a part of light is emitted out from a light exiting surface of the light guide plate to achieve light extraction
Data Source
AI summary
A light source module, liquid crystal display device and display apparatus. The light source module comprises a light guide plate and a light source disposed on the light guide plate side, and a plurality of micro structures are disposed on a light guide surface of the light guide plate. The light source module can provide a reflective liquid crystal display panel with an area light source similar to ambient light to improve light exiting brightness of the reflective liquid crystal display panel such that reflective liquid crystal display panel also has a better display effect in a dark environment and under a condition without ambient light.