Backlight Module Positioning Structures for Optical Film Alignment
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Conventional backlight modules face issues with optical film misalignment and damage due to smooth surfaces, leading to low display performance and damage from adhesives, especially in narrow frames, where alignment is difficult and adhesives can ruin the view region or cause optical film expansion issues.
Innovation Solution
A backlight module design featuring a light guiding plate with positioning structures comprising main and sub positioning members, where the sub positioning members extend along the main members to securely fix the optical film on the emitting surface, using a reflection material and varying placement of fixing members to ensure alignment and prevent view region interference, with dimensions between 0.2mm and 0.4mm thickness and 1mm to 5mm fixing distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mylar is used to stick the optical film on the LGP, then the optical film can be fixed, but the mylar is easily stuck on the view region and ruins the display performance
Solution Approach 1:
The harmful mylar adhesive is extracted and removed from the system. Instead of using mylar to stick the optical film, the patent uses positioning structures that mechanically locate and secure the optical film without requiring adhesive materials that could contaminate the view region.
Solution Approach 2:
Positioning structures serve as an intermediary mechanism between the LGP and the optical film. These structures provide a mediating function for fixation without introducing harmful substances, allowing the optical film to be secured while preventing adhesive contamination of the display area.
2Reliability
If mylar with strong stickiness is used to fix the optical film, then the optical film can be held firmly, but the optical film cannot timely expand when heated and gets ruined
Solution Approach 1:
The fixation function is segmented into discrete positioning structures rather than using a continuous adhesive layer. This segmentation allows the optical film to be held at specific points while maintaining the ability to expand freely in other areas when heated, resolving the conflict between fixation strength and thermal expansion capability.
Solution Approach 2:
The positioning structures provide a dynamic fixation system that accommodates thermal expansion. Unlike rigid adhesive bonding, the positioning structures allow for controlled movement and expansion of the optical film when heated, maintaining both fixation and adaptability to temperature changes.
3Object-affected harmful factors
If the optical film and LGP are both smooth surfaces, then the display performance is good, but the optical film easily comes off from the LGP
Solution Approach 1:
The fixation problem is solved by moving from a two-dimensional surface adhesion approach to a three-dimensional positioning structure approach. The positioning structures add vertical dimensionality to the fixation system, allowing smooth surfaces to maintain optical quality while achieving reliable fixation through mechanical positioning.
4Area of stationary object
If a narrow side frame is used, then the display area is maximized, but the optical film is more possible to come off due to limited space
Solution Approach 1:
Rather than using a continuous adhesive border around the entire perimeter, the patent applies positioning structures at specific critical locations. This local quality approach provides adequate fixation reliability in the limited space of narrow side frames while maximizing the display area by avoiding unnecessary adhesive coverage.
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 solution effectively aligns the optical film with the light guiding plate, preventing damage and enhancing display performance by ensuring secure fixation without affecting the view region, even when the optical film expands due to heating.
Implementation Method 1
a reflection material is spread on an inner side of the main positioning member
Data Source
AI summary
The present invention provides a backlight module and display panel. The backlight module includes a light guiding plate, an optical film, and at least two positioning structure. The at least two positioning structure are placed on the opposite side surfaces of the light guiding plate. Each of the positioning structure includes a main positioning member and a sub positioning member fixedly connected to the main positioning member. The main positioning member is fixedly connected to the side surface of the light guiding plate. The sub positioning member extends for a fixing distance along the main positioning member. The opposite at least two sub positioning member fix the optical film on the emitting surface of the light guiding plate.