LED Backlight Module Layout for Thin, Low-Source Displays
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Solution Overview
Problem
Existing display apparatuses face challenges in reducing cost and thickness.
Innovation Solution
The display apparatus incorporates a light source module with optical domes covering light emitting diodes and reflective layers, such as DBR, with specific pitch and optical distance configurations to reduce the number of light sources and optical distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Quantity of substance
If the number of light sources is reduced, then cost is reduced, but illumination intensity may be insufficient
Solution Approach 1:
Multiple light sources are integrated into a single integrated light source module, combining their functions while reducing the total number of separate light source components in the display apparatus
Solution Approach 2:
The integrated light source module performs multiple functions simultaneously: it provides illumination, integrates reflective layers for light direction control, and incorporates optical domes for light distribution, replacing what would traditionally require multiple separate components
2Length of stationary object
If optical distance is reduced, then thickness is reduced, but light distribution uniformity may deteriorate
Solution Approach 1:
Optical domes are positioned at specific locations corresponding to each light source, creating localized light distribution zones that collectively achieve uniform overall illumination despite the reduced optical distance
Solution Approach 2:
The patent introduces vertical layering with reflective layers positioned at different depths and angles, compensating for the reduced optical distance by utilizing the vertical dimension to control light distribution and maintain uniformity
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
This configuration reduces the number of light sources, thereby lowering costs and thickness of the display apparatus.
Implementation Method 1
The plurality of reflective layers may be provided as a Distributed Bragg Reflector (DBR)
Implementation Method 2
The plurality of reflective layers may be provided as a Distributed Bragg Reflector (DBR)
Implementation Method 3
a plurality of optical domes each configured to cover the plurality of light emitting diodes
Data Source
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AI summary
A light source device comprises a diffuser plate and a light source module disposed behind the diffuser plate. The light source module includes a substrate, a plurality of light emitting diodes mounted on the substrate, and a plurality of reflective layers each provided on a front surface of the plurality of light emitting diodes. When a distance between the centers of each of the plurality of light emitting diodes is referred to as a pitch, and a distance between the diffuser plate and the substrate is referred to as an optical distance, the pitch and the optical distance satisfy the following expression 2.2≤pitch/opticaldistance≤4.5