Backlight Module Convex Package Structure for Uniform Light
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Solution Overview
Problem
The optical film in direct-type backlight modules often adheres to the light source structure, affecting the appearance and uniformity of the backlight module and display device.
Innovation Solution
A light source structure with a package structure featuring convex portions that allows the optical film to contact only the convex portions, creating an air gap and preventing absorption, while also utilizing staggered convex and concave portions to enhance light uniformity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the optical film is placed directly on the encapsulant surface, then the structure is simple and easy to manufacture, but the optical film adheres to the light source structure causing appearance defects and non-uniformity
Solution Approach 1:
The patent divides the encapsulant surface into multiple convex portions and concave portions, creating a segmented structure. The optical film only contacts the convex portions while air gaps form in the concave portions, preventing adhesion. This segmentation resolves the contradiction by maintaining simple manufacturing while eliminating appearance defects through the textured surface design.
Solution Approach 2:
The patent introduces air gaps as an intermediary between the optical film and the encapsulant surface. These air gaps act as a mediator that prevents direct contact and adhesion between the optical film and light source structure, thereby improving appearance quality while maintaining the simple structure of placing the film directly on the encapsulant.
2Device complexity
If the optical film is placed directly on the encapsulant surface, then the structure is simple, but the light uniformity is poor due to film absorption on the light source
Solution Approach 1:
The encapsulant surface is segmented into convex and concave portions, creating a periodic structure that prevents the optical film from adhering to the light source. This segmentation maintains structural simplicity while significantly improving light uniformity by eliminating the absorption effect that occurs when the film directly contacts the light-emitting surface.
Solution Approach 2:
The patent transitions from a flat two-dimensional encapsulant surface to a three-dimensional surface with convex and concave portions. This dimensional change creates air gaps that prevent film adhesion and improve light uniformity, while the overall structure remains relatively simple and easy to manufacture.
3Ease of manufacture
If the package structure uses uniform height, then the manufacturing process is simple, but the light uniformity and appearance quality are compromised
Solution Approach 1:
The package structure is divided into multiple regions with different heights (first height, second height, third height), creating a segmented topography. This segmentation allows the optical film to contact only certain portions while maintaining air gaps in others, improving light uniformity without significantly complicating the manufacturing process through standard molding techniques.
Solution Approach 2:
Different portions of the package structure are given different local qualities (heights) to serve specific functions. The first height portions provide structural support, while the second and third height portions create air gaps to prevent film adhesion and improve light uniformity. This local differentiation resolves the contradiction between manufacturing simplicity and light 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
Prevents optical film absorption on the light source structure and improves light uniformity by dispersing and guiding light effectively, enhancing the appearance and performance of the backlight module and display device.
Implementation Method 1
the optical film is in contact with the convex portions of the package structure
Implementation Method 2
utilizing staggered convex and concave portions to enhance light uniformity
Data Source
AI summary
The present disclosure provides a backlight module and a display device. The backlight module includes a light source structure and an optical film. The light source structure includes a substrate, plural light-emitting units and a package structure. The light-emitting units are disposed on the substrate. The package structure covers the light-emitting units, and the package structure has plural convex portions. The optical film is disposed on the light source structure, and the optical film is in contact with the convex portions of the package structure.