Light Guide Plate Integrated Circuit Backlight Module
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Solution Overview
Problem
The fabrication process of conventional backlight modules is complex and costly due to the need for welding LEDs to a circuit board, which is then secured to the light guide plate, especially for larger modules where uniform illumination is challenging with single-sided light sources.
Innovation Solution
A light guide apparatus with integrated circuits and recessed compartments for light sources, where conductive layers, such as metal, graphite, or anisotropic conductive films, electrically bridge the light sources to circuit contacts within the light guide plate, simplifying the assembly and potentially improving light distribution.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If light sources are provided at one lateral side of the light guide plate, then the fabrication process is simpler, but the illuminating condition becomes nonuniform for large area light guide plates
Solution Approach 1:
The invention divides the light guide plate into multiple sections by placing light sources at multiple lateral sides (first side and second side opposite to each other). This segmentation of the illumination source distribution allows each side to contribute to uniform lighting across the entire plate area, preventing the nonuniform illumination that occurs with single-side lighting in large area applications.
2Reliability
If light sources are assembled onto a circuit board and then secured to the light guide plate, then electrical connections are established, but the fabrication process becomes complex and costly
Solution Approach 1:
The invention merges the light source assembly with the light guide plate structure by directly securing light sources to the plate itself rather than using a separate circuit board. This integration eliminates the intermediate circuit board component and simplifies the assembly process while maintaining reliable electrical connections through conductive adhesive or conductive paste applied directly to the light guide plate.
Solution Approach 2:
The light guide plate serves multiple functions: it guides and distributes light across the display area, provides structural support for the light sources, and acts as the substrate for electrical connections. This multi-functionality eliminates the need for a separate circuit board, reducing fabrication complexity and cost while maintaining all necessary electrical connection capabilities.
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
This solution simplifies the assembly process by eliminating the need for separate circuit boards and potentially enhances light uniformity across larger light guide plates by allowing light sources to be integrated directly into the plate with secure and efficient electrical connections.
Implementation Method 1
a conductive layer electrically bridging the light source to the circuit contacts
Data Source
AI summary
A light guide apparatus for a backlight module is disclosed, which includes a light guide plate, a circuit having a plurality of circuit contacts integrated with the light guide plate, and a light source disposed on the light guide plate and electrically contacted to the plurality of circuit contacts.