Optical Modulating Device Protrusions and Reflective Layer for Light Leakage
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional back light modules in liquid crystal display apparatuses face challenges in efficiently distributing light and preventing light leakage, leading to suboptimal brightness and uniformity.
Innovation Solution
An optical modulating device with a light transmissive region and a light blocking region is developed, featuring protrusions on a base substrate for light emission and a reflective layer for blocking light, along with an insulating layer to enhance light alignment and distribution, forming an integral light transmission layer that can be fabricated using a mold embossing process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If a light guide plate includes numerous light guide points to reflect light into the display panel, then light distribution is enhanced, but light leakage occurs and brightness uniformity deteriorates
Solution Approach 1:
The optical modulating device is segmented into distinct functional regions: a light transmissive region with protrusions for controlled light emission and a light blocking region with a reflective layer to prevent light leakage. This spatial segmentation resolves the contradiction by separating light guidance functions from light blocking functions, eliminating light leakage while maintaining brightness uniformity through the structured protrusion pattern in the transmissive region.
Solution Approach 2:
Different regions of the optical modulating device are assigned different optical properties: the light transmissive region has protrusions with specific refractive indices for light emission, while the light blocking region has a reflective layer with high reflectivity. This local differentiation of optical quality allows each region to perform its specific function optimally, preventing light leakage in the blocking region while ensuring uniform light distribution in the transmissive region.
2Use of energy by moving object
If conventional light guide plates are used to distribute light, then light is guided along transmission direction, but light alignment and utilization efficiency are insufficient
Solution Approach 1:
The protrusions in the light transmissive region are designed with specific geometric parameters (height, radius, spacing) and material refractive indices optimized for light extraction and alignment. By precisely controlling these parameters, the device achieves improved light alignment and higher utilization efficiency, resolving the contradiction between light guidance and light alignment reliability.
3Object-generated harmful factors
If a reflective layer is added to block light, then light leakage is prevented, but device complexity increases
Solution Approach 1:
The optical modulating device merges multiple functions into a single integrated structure: the protrusions in the light transmissive region perform light emission and alignment functions, while the reflective layer in the light blocking region performs light blocking and reflection functions. This merging of functions into one component resolves the contradiction by preventing light leakage without requiring additional separate structures, thus avoiding increased device complexity.
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 significantly improves light alignment and utilization in back light modules, enhancing the brightness and uniformity of the display by allowing controlled light emission and blocking, thereby increasing the light utilization rate.
Implementation Method 1
a reflective layer on the base substrate in the light blocking region and configured to block light from emitting out of the side of the optical modulating device
Implementation Method 2
a plurality of protrusions on the base substrate in the light transmissive region and configured to allow light emitting out of a side of the optical modulating device
Data Source
AI summary
The present application provides an optical modulating device having a light transmissive region and a light blocking region. The optical modulating device includes a base substrate; a plurality of protrusions on the base substrate in the light transmissive region and configured to allow light emitting out of a side of the optical modulating device; and a reflective layer on the base substrate in the light blocking region and configured to block light from emitting out of the side of the optical modulating device.