Optical Film Support Arrangement for LCD Backlight Modules
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Solution Overview
Problem
Current liquid crystal display devices face challenges in optimizing optical film support within backlight modules, particularly in scenarios without diffusion plates, which affect light transmission and increase costs.
Innovation Solution
The implementation of support elements on opposite sides of the rear plate with fixing holes in the optical films, allowing for tensioning with tensile forces to securely position and evenly spread the optical films, eliminating the need for a diffusion plate and creating a gap for light transmission.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Illumination intensity
If optical film set is directly disposed on diffusion plate or light guide plate, then structural simplicity is maintained, but light transmission quality deteriorates and cost increases
Solution Approach 1:
The support structure is segmented into multiple independent support elements (first support element and second support element) positioned at opposite sides, each engaging with corresponding fixing holes. This segmentation allows precise positioning and tensioning of the optical film without requiring a complex integrated support system or diffusion plate.
Solution Approach 2:
Support elements act as intermediary components between the rear plate and the optical film set. These intermediaries provide the necessary mechanical support and tensioning while maintaining a gap for light transmission, eliminating the need for direct contact between the optical film and diffusion plate/light guide plate.
2Reliability
If diffusion plate is used to support optical films, then structural stability is improved, but cost increases and light transmission is hindered
Solution Approach 1:
The invention extracts and eliminates the diffusion plate from the support structure, retaining only the essential support elements needed for optical film positioning. This removal reduces cost and eliminates the barrier to light transmission while maintaining positioning stability through the support elements and fixing holes mechanism.
Solution Approach 2:
The support elements are designed as simple, inexpensive components that can be easily manufactured and assembled, replacing the expensive diffusion plate. The fixing holes in the optical film provide permanent attachment points, ensuring long-term reliability without requiring costly supporting structures.
3Ease of manufacture
If optical film is directly connected to light guide plate, then assembly simplicity is maintained, but light transmission quality deteriorates
Solution Approach 1:
Support elements serve as intermediaries that simplify assembly by providing clear engagement points (fixing holes) while simultaneously creating the necessary gap for optimal light transmission. This intermediary structure maintains assembly simplicity without compromising brightness uniformity.
Solution Approach 2:
The optical film is pre-formed with fixing holes during manufacturing, enabling direct engagement with support elements. This preliminary preparation simplifies the assembly process by eliminating the need for additional drilling or attachment operations while ensuring precise positioning for optimal light transmission.
Data Source
AI summary
A backlight module includes a rear plate, at least one light source disposed on the rear plate, at least two support elements respectively disposed on two opposite sides of the rear plate, and at least one optical film disposed above the light source. The optical film includes at least two fixing holes respectively corresponding to the support elements. The support elements respectively engage with the fixing holes to tension the optical film with at least one pair of tensile forces oriented in opposite directions.