Light Guide Plate Film Limiting Structure for Backlight Module
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Solution Overview
Problem
Conventional LCD backlight modules experience relative displacement and vibration friction between the light guide plate and optical film, leading to poor white spots due to separate fixation, and require a plastic frame that limits border thinning and complicates assembly.
Innovation Solution
A light guide plate with a film limit part on the exiting surface and a fixed part on the side surface, forming protruding structures to limit and fix the optical film, reducing vibration friction and allowing the light guide plate to replace the frame, thereby thinning borders and simplifying assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the light guide plate and optical film are separately and individually fixed in the backlight module, then the assembly structure is simple, but relative displacement occurs during vibration causing friction and poor white spots
Solution Approach 1:
The patent integrates the light guide plate and optical film into a single integrated structure where the optical film is disposed on the light exiting surface of the light guide plate. This merging eliminates the separate fixation of two components, preventing relative displacement and vibration friction while maintaining assembly simplicity through the unified design.
2Reliability
If a plastic frame is used to limit the optical film, then the optical film is fixed, but the frame border thickness increases and assembly becomes complicated
Solution Approach 1:
The patent extracts the optical film limiting function from the plastic frame structure. Instead of using a separate frame to limit the optical film, the light guide plate itself is designed with an integrated structure that inherently limits and fixes the optical film on its light exiting surface, eliminating the need for additional frame components.
Solution Approach 2:
The light guide plate serves multiple functions: it guides light from the light source and simultaneously provides structural support to limit and fix the optical film. This multi-functionality replaces the need for a separate plastic frame, simplifying the overall device structure while maintaining reliable optical film fixation.
Data Source
AI summary
A light guide plate, a backlight module and a display device is provided. The light guide plate includes: a film limit part and a fixed part. The film limit part is arranged on a light exiting surface of the light guide plate as a protruding structure, limiting an optical film arranged on the light exiting surface of the light guide plate. The fixed part is arranged on a side surface of the light guide plate as a bump structure to fix the light guide plate to a frame arranged on the side surface of the light guide plate. Issues of vibration friction between the light guide plate and the optical film and poor white spots can be solved effectively according to the present disclosure.