Light Guide Plate Micro Structure Gradient for LCD Brightness
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Solution Overview
Problem
Reflective liquid crystal display devices struggle to maintain effective display in low or dark environments due to reliance on ambient light, resulting in reduced display quality.
Innovation Solution
A light source module with a light guide plate featuring micro structures whose areas or numbers gradually increase from the light incident side to the exiting side, combined with a reflector, provides an area light source to enhance display brightness and uniformity, allowing operation without ambient light.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a reflective liquid crystal display device relies on ambient light for display, then the display effect is good in high ambient light conditions, but the display effect deteriorates in low or dark environments
Solution Approach 1:
A light guide plate is introduced as an intermediary component between the light source and the reflective liquid crystal display panel. The light guide plate guides and distributes light uniformly across the display panel, enabling the device to function in low or dark environments while maintaining good display effects in high ambient light conditions
Solution Approach 2:
Micro structures are disposed on the light guide plate at intervals, with the sum of areas of micro structures on a unit area gradually increasing from the light incident side to the light exiting side. This creates local variations in light extraction efficiency, improving overall light distribution uniformity and display quality across different ambient light conditions
2Stability of the object's composition
If micro structures are disposed on the light guide plate to improve light extraction, then light exiting uniformity is improved, but the structural complexity increases
Solution Approach 1:
The sum of areas of micro structures on a unit area is designed to gradually increase from the light incident side to the light exiting side. This parameter variation optimizes light extraction and distribution uniformity while keeping the overall structure relatively simple and manufacturable
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 improves light exiting brightness and uniformity, enabling better display performance in dark environments and normal operation without ambient light, by gradually increasing the micro structure areas or numbers on the light guide plate from the incident to the exiting side, and using a reflector to maximize light usage.
Implementation Method 1
a light guide plate, including a light guide surface and a light exiting surface disposed oppositely
Implementation Method 2
a plurality of micro structures are disposed on a light guide surface of the light guide plate at intervals, from the light incident side to the light exiting side, a sum of areas of the micro structures disposed on a unit area of the light guide surface gradually increases
Implementation Method 3
the light source module includes a reflector disposed on a side of the light guide plate
Data Source
AI summary
A light source module, a liquid crystal display device, and a display apparatus are provided. The light source module disposes a plurality of micro structures disposed at intervals on a light guide surface of a light guide plate and disposes a sum of areas of the micro structures on an unit area on the light guide surface gradually increasing from a light incident side to a light exiting side, which can improve uniformity of light exiting brightness of each region of the light guide plate.