Direct Backlight Module With Inclined LED Mounts
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Solution Overview
Problem
Conventional direct backlight modules face challenges in achieving simultaneous homogenization of illumination and size thinning due to constrained light mixing distance caused by parallel alignment of LED light bars and diffusion plates.
Innovation Solution
The direct backlight module incorporates mount units with inclined slope surfaces on the backplane, allowing backlight sources to be mounted at an angle relative to the diffusion plate, increasing light mixing distance and using LED lenses for improved homogeneity and reduced LED lamp quantity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If LED light bars are arranged parallel to the diffusion plate, then the structure is simple and easy to manufacture, but the light mixing distance is constrained and homogenization cannot be achieved simultaneously with size thinning
Solution Approach 1:
The patent introduces a new spatial dimension by tilting the LED light bars at an angle (e.g., 45 degrees) relative to the diffusion plate instead of arranging them parallel. This angular arrangement creates an extended light path through the backlight module, increasing the effective light mixing distance without increasing the overall module thickness, thereby achieving better homogenization while maintaining compact size.
2Length of stationary object
If the thickness of the backlight module is reduced for size thinning, then the module becomes thinner, but the light mixing distance is constrained and homogenization cannot be achieved
Solution Approach 1:
By changing the orientation of LED light bars from parallel to angled (e.g., 45 degrees) relative to the diffusion plate, the patent extends the light mixing path diagonally through the module. This dimensional change allows sufficient light diffusion distance to be achieved within a reduced overall thickness, enabling both size thinning and effective homogenization.
Solution Approach 2:
The patent modifies the angular parameter of LED light bar arrangement (e.g., setting at 45 degrees instead of parallel), which changes the light propagation path length and distribution characteristics. This parameter adjustment optimizes the balance between module thickness and light mixing effectiveness, achieving homogenization in a thinner profile.
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 enhances illumination intensity and homogeneity while reducing the number of LED lamps needed, lowering manufacturing costs and enabling thinner module designs.
Implementation Method 1
a diffusion plate mounted to the backplane and located above the backlight sources
Implementation Method 2
a reflector plate arranged inside the backplane
Data Source
AI summary
The present invention provides a direct backlight module including a backplane, backlight sources arranged inside the backplane, and a diffusion plate mounted to the backplane and located above the backlight sources. The backplane includes a bottom plate, side plates connected to the bottom plate, and mount units formed on the bottom plate and each having first and second slope surfaces that are inclined in opposite directions. The backlight sources are respectively mounted to the first and second slope surfaces, whereby the backlight sources are set inclined with respect to the diffusion plate in order to increase the distance available for light mixing, improve intensity and homogeneity of illumination, and at the same time reduce the quantity of LED lamps used to reduce the manufacture cost and facilitate size thinning of the backlight module.