Backlight Module Optical Microstructures for Uniform Light and Thin Profile
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Solution Overview
Problem
Conventional backlight modules without light guide plates face challenges in achieving uniform light emission and maintaining thinness, as they rely on air layers that can cause optical film subsidence deformation, leading to poor light quality and increased thickness.
Innovation Solution
Incorporating optical microstructures between the back plate and optical film, which guide light via concave and convex surfaces, and tilted surfaces to ensure uniform light distribution and support the optical film, preventing subsidence deformation, thus enhancing light emission quality and reducing module thickness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If the distance between the back plate and the optical film is adjusted to enhance light emission uniformity, then the light emission uniformity is improved, but the backlight module thickness increases
Solution Approach 1:
The invention introduces optical microstructures (prisms or lenses) as intermediate elements between the light source and optical film, segmenting the light path into controlled regions. These microstructures locally redirect light rays to achieve uniform illumination without increasing the overall gap distance, thus resolving the contradiction between light uniformity and module thickness.
Solution Approach 2:
The optical microstructures serve as intermediary elements that mediate between the light source and optical film. They actively manage light distribution through refraction and reflection, enabling uniform light emission while maintaining a compact structure, thereby solving the contradiction without requiring increased thickness.
2Ease of operation
If an air layer is formed between the back plate and optical film to allow light transmission, then light can pass through without physical obstruction, but the optical film becomes susceptible to subsidence deformation
Solution Approach 1:
The optical microstructures act as intermediary support elements that provide mechanical stability to the optical film while allowing light transmission. These structures create localized contact points or support zones within the air layer, preventing film subsidence without blocking the light path, thus resolving the contradiction between light transmission and film stability.
Solution Approach 2:
The invention applies local quality by creating localized support zones through optical microstructures distributed across the air layer. These microstructures provide targeted mechanical support where needed while maintaining the overall air layer configuration for light transmission, preventing subsidence deformation without compromising optical performance.
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 optical microstructures improve light emission uniformity without requiring adjustments in the distance between the back plate and optical film, maintaining a thin profile and preventing optical film deformation, resulting in a backlight module with favorable light quality and reduced thickness.
Implementation Method 1
Each of the optical microstructures includes a first transparent structure and a second transparent structure... The first transparent structure has a front end and a rear end opposite to each other, the front end faces toward the light source and has a first concave surface, the rear end faces away from the light source and has a convex surface
Implementation Method 2
The second transparent structure has a front surface and a rear surface. The front surface faces toward the light source and tilts in relative to the supporting surface. The rear surface faces away from the light source and tilts in relative to the supporting surface
Data Source
AI summary
A backlight module includes a back plate, an optical film, a light source and optical microstructures. The back plate has a supporting surface. The optical film is disposed on the back plate. The supporting surface and the optical film have a gap therebetween. The light source disposed on the supporting surface is adapted to emit light toward the optical microstructures. Each optical microstructure includes first and second transparent structures. The first transparent structure connected to the supporting surface has front and rear ends. The front end facing toward the light source has a first concave surface. The rear end facing away from the light source has a convex surface. The second transparent structure connected to the first transparent structure has front and rear surfaces tilted in relative to the supporting surface. The front surface faces toward the light source, and the rear surface faces away from the light source.