Light Guide Plate Eccentric Triangle Protrusions Backlight Uniformity
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Solution Overview
Problem
Conventional liquid crystal displays face challenges in achieving uniform brightness and light concentration due to the complexity of optical films used in backlight modules, which complicates control over light output and efficiency.
Innovation Solution
A light guide plate design featuring adjacent mirror-reflected structures with eccentric triangle protrusions on both surfaces, optimizing light path and concentration by adjusting the angles and patterns to enhance brightness and output efficiency, potentially reducing the need for multiple optical films.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical films are used for light treatment in backlight modules, then light concentration and diffusion can be achieved, but control over brightness and uniformity becomes difficult
Solution Approach 1:
The patent applies asymmetry by using eccentric triangle protrusions instead of symmetric circular or rectangular structures. The eccentric triangles are positioned asymmetrically on the light guide plate surface, creating non-uniform light diffusion patterns that improve both light concentration and controllability. This asymmetric geometry allows precise control over light distribution while maintaining effective light concentration.
2Illumination intensity
If multiple optical films are used in backlight modules, then light treatment functions are enhanced, but device complexity increases
Solution Approach 1:
The patent merges multiple optical film functions into a single light guide plate structure. The eccentric triangle protrusions integrated into the light guide plate simultaneously perform light concentration, diffusion, and uniformity control that would traditionally require separate optical films. This integration reduces the number of components while maintaining enhanced light treatment capabilities.
Solution Approach 2:
The light guide plate with eccentric triangle protrusions serves multiple functions: it guides light from the source, concentrates light in specific directions, diffuses light for uniform distribution, and controls brightness patterns. This multi-functional design eliminates the need for multiple specialized optical films, reducing device complexity while maintaining comprehensive light treatment.
3Ease of manufacture
If conventional light guide plate structures are used, then manufacturing is simple, but light output efficiency and concentration are insufficient
Solution Approach 1:
The patent applies local quality by creating specific eccentric triangle protrusions at particular locations and orientations on the light guide plate surface. Rather than uniform structures throughout, the eccentric triangles are strategically positioned to optimize light extraction and concentration at specific regions, improving overall light output efficiency while maintaining manufacturability through localized structural variations.
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 proposed light guide plate design improves light concentration and output efficiency, maintaining symmetry at parallel viewing angles and increasing luminous flux, thereby enhancing the overall performance of the backlight module and liquid crystal display.
Implementation Method 1
the first structure includes at least one first protrusion having a cross section of a eccentric triangle; and the second structure includes at least one second protrusion having a cross section of a eccentric triangle
Implementation Method 2
Reflector 40 located under the light guide plate 10 is for reflecting light leaked out of the light guide plate 10
Data Source
AI summary
A light guide plate, a backlight module and a liquid crystal display are provided. The light guide plate has a first surface at least having one first structure and one second structure formed thereon. The first structure and the second structure are adjacent arranged and are mirror reflection with each other. Each of the first structure and the second structure has a first protrusion having a cross section of eccentric triangle.