Transparent Resin Backlight Frame with Diffusion Adhesive Layers
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Solution Overview
Problem
Conventional backlight devices face challenges in achieving thinner and narrower frames due to structural limitations, leading to decreased display quality as the tolerance between the illumination area and the liquid crystal display effective area becomes smaller.
Innovation Solution
A backlight device design featuring a frame made of transparent resin with diffusion adhesive layers and a reflecting sheet, which enhances light diffusion and distribution, allowing for a thinner and narrower frame structure that effectively illuminates the liquid crystal display panel.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Volume of moving object
If the frame dimensions are reduced to achieve thinner and narrower backlight devices, then the display area increases, but the structural limit of injection molding is reached and manufacturing becomes difficult
Solution Approach 1:
The frame is divided into a first frame portion and a second frame portion that are coupled together. This segmentation allows each portion to be manufactured separately using conventional injection molding processes, avoiding the structural limits while achieving the overall thin and narrow design goal.
Solution Approach 2:
The first and second frame portions are coupled to form the complete frame structure, with each portion nesting into or alongside the other. This nested arrangement achieves the reduced overall dimensions while maintaining manufacturability through modular assembly of conventionally-sized components.
2Volume of moving object
If the frame dimensions are reduced to achieve thinner and narrower backlight devices, then the display area increases, but the tolerance between illumination area and liquid crystal display effective area becomes smaller, causing display quality to decrease
Solution Approach 1:
By segmenting the frame into multiple portions, the patent enables independent positioning and adjustment of each segment relative to the lightguide plate and optical sheets. This facilitates precise alignment of the illumination area with the liquid crystal display effective area, maintaining display quality even in thin designs.
Solution Approach 2:
The frame portions are designed with specific local features that optimize light distribution in different areas. This ensures uniform illumination across the display effective area while maintaining the thin overall profile, addressing local precision requirements without compromising the global thinness goal.
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 enables the production of thinner and narrower backlight devices with improved light distribution, preventing darkened peripheries and enhancing display quality, even when viewed from inclined angles.
Implementation Method 1
a first diffusion adhesive layer with a light diffusion, disposed on a first surface of the frame; a second diffusion adhesive layer with a light diffusion, disposed on a second surface of the frame
Implementation Method 2
a reflecting sheet adhered to the frame with the first diffusion adhesive layer
Data Source
AI summary
A backlight device includes a frame formed of a transparent resin, a first diffusion adhesive layer with a light diffusion, provided on a first surface of the frame, a second diffusion adhesive layer with a light diffusion, provided on a second surface of the frame which is opposite to the first surface, a reflecting sheet adhered to the frame with the first diffusion adhesive layer, a light guide plate on the reflecting sheet in the frame, and a light source disposed in the frame to irradiate light to the light guide plate.