Backlight Module Reflector Positioning via Elastic Member Slots
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Solution Overview
Problem
Existing backlight module designs face issues with reflector positioning, particularly in narrow-boarder designs, where traditional methods like interengagement or double-side tape lead to inconsistent light distribution, heat vulnerability, and positional instability over time.
Innovation Solution
A backlight module incorporating a waveguide, a reflector, and elastic members with slots and tabs, where the elastic members are made of rubber and arranged on the waveguide corners to securely hold the reflector, enhancing reliability and suitability for narrow-boarder designs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If interengagement between notch and tab is used to position the reflector, then the reflector can be securely positioned, but it is detrimental to narrow-boarder design and increases device complexity
Solution Approach 1:
The positioning function is segmented between the elastic member (providing flexible support) and the tab (providing precise positioning), allowing each component to have a simplified structure while collectively achieving reliable positioning
Solution Approach 2:
The elastic member acts as a flexible component that can deform to accommodate assembly variations and thermal expansion, providing reliable positioning without requiring complex rigid structures or additional fastening elements
2Ease of manufacture
If double-side tape is used to attach the reflector, then the reflector can be positioned, but it is vulnerable to heat and loses position after prolonged usage
Solution Approach 1:
The elastic member with slot acts as an intermediary mechanical structure between the reflector and the housing, providing a stable positioning mechanism that is not susceptible to heat degradation like adhesive tapes
Solution Approach 2:
The mechanical elastic member with slot replaces the chemical adhesive bonding system, substituting a heat-resistant mechanical positioning method for the heat-vulnerable tape attachment method
3Illumination intensity
If a waveguide is defined with a waveguide structure, then light distribution can be controlled, but it creates unwanted situations and increases casting cost
Solution Approach 1:
The elastic member serves multiple functions: it provides mechanical support for the waveguide, positions the reflector through the slot-tab mechanism, and allows for assembly tolerance compensation, eliminating the need for separate positioning structures that would increase casting complexity
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 configuration ensures reliable reflector positioning, improves light utilization, and maintains stability even in narrow-boarder designs, addressing the limitations of prior art by providing a secure and heat-resistant solution.
Implementation Method 1
the elastic members are made from rubber
Data Source
AI summary
The present invention provides a backlight module comprises a waveguide, a reflector, and elastic members. Wherein the elastic members are used to arranged on corners of the waveguide, and the reflector is arranged on a side of the waveguide facing the elastic members. And wherein each of the elastic members is provided with a slot in a surface facing the reflector, and the reflector is provided with tabs corresponding to each of the slots so as to be securely received within the slots. The present invention further provides a liquid crystal display device incorporated with such a backlight module. By this arrangement, the backlight module become more reliable, and more suitable for narrow-boarder design. The utilization of the reflector is also enhanced.