Backlight Module Fixing Frame Protrusion Alignment
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Solution Overview
Problem
Existing backlight modules in LCDs face issues with optical energy loss due to gaps between the lamp and light guide plate, misalignment causing angle light leakage and bright spots, and panel warp during thermal testing, leading to increased costs and limited stability solutions.
Innovation Solution
A backlight module design featuring a fixing frame with a protrusion that presses the light guide plate, eliminating the need for additional fixing tapes and ensuring precise alignment of the lamp and light guide plate, with a lamp fixing hole and strip configuration to enhance mechanical and optical stability.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If additional fixing tapes are added to guarantee alignment and stability, then alignment precision and stability improve, but device complexity and cost increase
Solution Approach 1:
The patent combines the fixing frame and alignment structure into a single integrated component. The fixing frame includes positioning protrusions that directly align the light guide plate with the lamp, eliminating the need for separate fixing tapes while maintaining precise alignment between optical components.
Solution Approach 2:
The fixing frame serves multiple functions simultaneously: it provides mechanical support, ensures precise alignment through positioning protrusions, and secures the light guide plate in place. This multi-functional design replaces multiple separate components (fixing tapes and alignment fixtures) with a single universal structure.
2Reliability
If additional fixing tapes are added to guarantee alignment and stability, then reliability improves, but manufacturing cost increases
Solution Approach 1:
The patent integrates the fixing and alignment functions into the fixing frame structure itself, eliminating the need for additional fixing tapes. This reduction in component count directly lowers manufacturing costs while maintaining stable assembly through the frame's built-in positioning protrusions.
3Loss of energy
If the lamp and light guide plate are required to contact closely for optimal optical coupling, then optical energy efficiency improves, but manufacturing precision requirements increase
Solution Approach 1:
The fixing frame is pre-designed with positioning protrusions that automatically align the light guide plate with the lamp during assembly. This preliminary alignment structure ensures close contact between optical surfaces without requiring high-precision manual adjustment, thereby reducing optical energy loss while maintaining feasible manufacturing tolerances.
Data Source
AI summary
A backlight module and a liquid crystal display device, the backlight module comprises a back plate (101) and a fixing frame (102) firmly connected with the back plate (101), and further comprises a light guide plate (106); the fixing frame (102) is provided with a protrusion (111) extending towards an inner side of the backlight module, the light guide plate (106) extends into a region under the protrusion (111) of the fixing frame (102) and is pressed by the protrusion (111); the light guide plate (106) is provided with a lamp fixing hole (112) configured to fix a lamp. A liquid crystal display device comprising the backlight module is further disclosed.