Backlight Module Prism Film Integration Thickness Reduction
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Solution Overview
Problem
Existing liquid crystal display devices face challenges in reducing thickness while maintaining mechanical strength, as conventional methods require thinning panel glass or reusing optical films, leading to increased thickness due to gaps between components to prevent scratching.
Innovation Solution
A backlight module with a prism film arranged at the light-exiting side of a light guide plate, using an adhesive to create a controlled gap and integrate the prism film and polarizer, reducing overall thickness without compromising mechanical strength.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If the prism film is placed close to the light guide plate to reduce thickness, then the overall thickness is reduced, but the prism units may scratch the light guide plate
Solution Approach 1:
A spacer is introduced as an intermediary component between the prism film and the light guide plate. The spacer maintains a precise gap that prevents the prism units from contacting and scratching the light guide plate, while still allowing the overall structure to remain thin. This mediator resolves the conflict between close proximity for thickness reduction and physical protection of the light guide plate.
2Object-affected harmful factors
If a gap is left between the prism film and light guide plate to prevent scratching, then the light guide plate is protected, but redundant space increases the thickness
Solution Approach 1:
The gap between the prism film and light guide plate is optimized to a specific parameter range that is sufficient to prevent scratching but minimal enough to avoid redundant space. By precisely controlling the gap dimension through the spacer, the design achieves protection without excessive thickness increase.
3Ease of manufacture
If multiple separate components are used for prism film and polarizer, then each component can be optimized independently, but the overall thickness and complexity increase
Solution Approach 1:
The polarizer and prism film are integrated into a single composite component structure. This merging reduces the overall thickness by eliminating redundant layers and interfaces between separate components, while still allowing independent optimization of each functional layer within the integrated structure.
Data Source
AI summary
A backlight module and a display device are provided. The backlight module includes a light guide plate and a prism film arranged at a light-exiting side of the light guide plate. The display device includes the above backlight module and a lower polarizer arranged on the prism film.