Stiffened Bar Light Source Module for LCD Backlight Assembly
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Solution Overview
Problem
The existing edge lighting backlight modules for LCDs face challenges in mounting and assembling due to the weak rigidity of flexible circuit strips used in light source devices, which makes it difficult to securely fix the light sources within the supporting stand's containing space.
Innovation Solution
The introduction of a stiffened bar with greater rigidity, which overlaps and surrounds the flexible circuit strip, providing additional structural support and allowing the light sources to protrude through holes or be enclosed within a framework, enhancing the assembly process and yield of the backlight module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a flexible circuit strip is used in the light source device, then the light source device can be mounted from the side of the supporting stand, but the rigidity of the light source device becomes weak making it difficult to fix securely
Solution Approach 1:
The patent combines a flexible circuit strip with a stiffened bar to create a composite light source device structure. The flexible circuit strip provides flexibility for side mounting, while the stiffened bar provides the necessary rigidity and structural support. This composite structure resolves the contradiction by integrating materials with complementary mechanical properties.
Solution Approach 2:
The light source device is divided into two functional segments: the flexible circuit strip segment for mounting purposes and the stiffened bar segment for structural support. This segmentation allows each component to specialize in its optimal function without compromising the other.
2Volume of moving object
If the distance between top plate and bottom plate is smaller than the height of the light source device, then the backlight module achieves thinner thickness, but the light source device cannot easily enter the containing space
Solution Approach 1:
The light source device incorporates a flexible circuit strip that can dynamically change its configuration. During assembly, the flexible circuit strip can be bent or folded to reduce the effective height, allowing the device to enter the containing space. Once positioned, it maintains its functional structure, thus resolving the contradiction between thin profile and assembly ease.
Solution Approach 2:
Instead of trying to fit a rigid high-profile device into a low space, the patent inverts the approach by making the mounting structure flexible and adaptable to the space constraints, rather than constraining the device to fit a fixed space.
Data Source
AI summary
A light source module includes a light bar and a stiffened bar. The light bar includes a flexible circuit strip and a plurality of light sources. The light sources are disposed on the flexible circuit strip along an extension direction of the flexible circuit strip. The stiffened bar overlaps the flexible circuit strip and is disposed on a face of the flexible circuit strip having the light sources. The stiffened bar surrounds at least one side of each light source and exposes the light sources. The rigidity of the stiffened bar is larger than the flexible circuit strip.