Backlight Spacer Assembly for Display Light Guide Alignment
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Solution Overview
Problem
Existing display backlight systems face challenges in positioning and centering multiple light guides, leading to increased tolerance build-up and poorer optical performance, especially when multiple light guides are used, which complicates the assembly process and results in a less efficient lighting solution.
Innovation Solution
A spacer assembly that combines light guides and optical films using optically clear adhesive films, with alignment elements and a recess for precise distance adjustment, eliminating the need for additional holding elements and ensuring optimal optical properties.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If multiple light guides are individually inserted into a housing, then the assembly process is simple, but positioning and centering becomes challenging leading to increased tolerances
Solution Approach 1:
The patent combines multiple light guides and optical films into a single integrated assembly mounted on one spacer, eliminating the need to individually insert multiple separate components into the housing. This merging approach maintains assembly simplicity while ensuring precise positioning through the unified structure.
Solution Approach 2:
The invention segments the backlight system into modular components (spacer with mounting surfaces, light guides, optical films) that can be pre-assembled and tested separately, then installed as a complete unit. This segmentation allows for precise manufacturing of each component while simplifying the final assembly process.
2Volume of moving object
If the distance between backlight components is minimized, then the device becomes more compact, but positioning precision becomes more difficult to maintain
Solution Approach 1:
The spacer acts as an intermediary component between the light guides and optical films, providing a rigid mounting structure with precise geometric features. This intermediary element enables compact component spacing while maintaining positioning precision through its structured design with dedicated mounting surfaces and alignment features.
3Stability of the object's composition
If additional holding elements are used to secure components, then positioning stability improves, but device complexity increases
Solution Approach 1:
The spacer performs multiple functions simultaneously: it provides structural support, establishes precise spacing between components, offers mounting surfaces for light guides and optical films, and ensures proper alignment. This multi-functionality eliminates the need for separate holding elements, reducing component complexity while maintaining positioning stability.
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 spacer assembly allows for precise alignment and connection of light guides and films, reducing tolerance issues, enhancing optical performance, and enabling a compact, robust design with reduced rattling noise, suitable for high-load applications like automotive displays.
Implementation Method 1
The first and second light guides are attached to the mounting surfaces of the spacer by means of optically clear adhesive films
Data Source
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AI summary
The present invention relates to a spacer (101) for a backlight assembly of a display. The invention further relates to a backlight assembly of a display comprising such a spacer (101), and to a display with a backlight comprising such an assembly. The spacer (101) has at least one web (102). The web (102) has mounting surfaces (103, 104) for mounting a first light guide (105) and a second light guide (107), and a receptacle for a film stack (106).