Modular Light Mixer Array for Backlight Efficiency
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight modules have low light mixing efficiency and require a large number of LEDs, leading to high power consumption and fabrication costs due to the use of a large light guide plate.
Innovation Solution
A modularized backlight module design featuring an array of light mixers, each comprising a light mixing plate with LEDs, upper and lower reflecting layers, and a semi-permeable layer, which enhances light mixing efficiency and luminance without the need for a large light guide plate.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a large light guide plate is used in conventional backlight modules, then the light mixing can be achieved, but the fabrication complexity and cost increase significantly
Solution Approach 1:
The patent divides the large light guide plate into multiple smaller light guide blocks arranged in an array. Each block is independently manufactured and then assembled together, significantly simplifying the fabrication process and reducing manufacturing complexity while maintaining the overall light mixing function.
Solution Approach 2:
The patent embeds multiple light guide blocks within a single backlight module structure, arranging them in a compact array configuration. This nested arrangement allows the modular components to work together as an integrated system, reducing the need for a single large complex component.
2Productivity
If LEDs are arranged in a conventional backlight module with air layer, then light emission is achieved, but the light mixing efficiency is low and thickness cannot be reduced
Solution Approach 1:
The patent introduces a light mixing plate as an intermediary component between the LEDs and the outer surface. This specialized plate with specific optical properties (refractive index matching, surface treatment) efficiently mixes the light from multiple LEDs and directs it outward, significantly improving light mixing efficiency while allowing for compact thickness.
Solution Approach 2:
The patent changes the optical parameters of the light mixing plate, including its refractive index, surface curvature, and material composition, to optimize light mixing efficiency. By adjusting these parameters, the system achieves effective light mixing in a compact thickness without requiring increased spacing between LEDs.
3Illumination intensity
If multiple LEDs are used in conventional backlight modules, then the light output is sufficient, but the power consumption and fabrication cost increase
Solution Approach 1:
The patent designs each light guide block to serve multiple functions: it acts as both a light guide and a light mixing component. The light mixing plate within each block performs the dual function of mixing light and directing it outward, eliminating the need for separate components and reducing the total number of LEDs required while maintaining sufficient light output.
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 design improves light mixing efficiency and luminance, allowing for a reduction in the number of light mixers and LEDs, simplifying fabrication and maintenance while reducing costs.
Implementation Method 1
Each light guide block 20 includes a light guide body 21, a receiving space 22, and four LEDs 23, 24, 25, and 26. The light guide body 21 is made of an acrylate resin for the lights to penetrate through
Implementation Method 2
The upper reflecting layers are respectively located right above the light sources. The lower reflecting layer is located on the lower surface of the light mixing plate
Implementation Method 3
The semi-permeable layer wraps the peripheral surface of the light mixing plate
Data Source
AI summary
A light mixer includes a light mixing plate, a plurality of light sources, a plurality of upper reflecting layers, a lower reflecting layer, and a semi-permeable layer. The light mixing plate has an upper surface, a lower surface, a peripheral surface, and a plurality of receiving holes. The light sources are respectively located in the receiving holes. The upper reflecting layers are respectively located right above the light sources. The lower reflecting layer is located on the lower surface of the light mixing plate. The semi-permeable layer wraps the peripheral surface of the light mixing plate. A diffuser is located above the light mixers.