LCD Module Mold Frame and LED Assembly Simplification
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Solution Overview
Problem
The assembly process of prior art liquid crystal display (LCD) devices is complex and time-consuming, making them difficult to manufacture and assemble efficiently.
Innovation Solution
An LCD module design featuring a liquid crystal panel, a mold frame, a light guide plate, and a light source assembly with a printed circuit board and point light source elements, allowing for simplified assembly and reduced thickness, along with a method involving sequential arrangement of optical sheets and light source assemblies to automate the assembly process.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If a traditional LCD device structure with CCFL and side emission type is used, then light emission function is achieved, but the assembly process becomes complicated and time-consuming
Solution Approach 1:
The light source assembly is divided into separate point light source elements (LEDs) that can be independently arranged and connected to the PCB, rather than using a single integrated CCFL tube. This segmentation allows for modular assembly and simplifies the manufacturing process while maintaining the light emission function.
Solution Approach 2:
The mold frame serves multiple functions: it provides structural support for the liquid crystal panel, acts as a mounting platform for the light source assembly, and serves as a framework for the entire display device. This multi-functionality reduces the number of separate components needed, simplifying the overall assembly process.
2Productivity
If manual assembly method is used for side emission type LCD device, then assembly can be performed, but manufacturing time is excessive
Solution Approach 1:
The point light source elements are pre-connected to the PCB with circuit patterns before being installed in the mold frame. The optical sheets and light guide plate are also pre-arranged in specific sequences. These preliminary preparations enable faster final assembly and facilitate automation of the manufacturing process.
Solution Approach 2:
The patent replaces the manual mechanical assembly process with an automated system where point light source elements are mounted on PCBs and the entire light source assembly is coupled to the mold frame in a standardized manner. This substitution of manual operations with automated processes significantly increases assembly speed and reduces manufacturing time.
3Strength
If thicker components are used for structural support, then structural strength is improved, but the overall device thickness increases
Solution Approach 1:
The mold frame is constructed as a composite structure that combines structural support functionality with mounting features for the light source assembly. This composite design provides adequate structural strength while maintaining a thin profile, as the frame integrates multiple functions into a single thin component rather than requiring separate thick structural elements.
Solution Approach 2:
Instead of increasing thickness in the vertical dimension to achieve structural support, the patent distributes support functions across the horizontal plane through the mold frame's extended structure. The frame provides support through its planar configuration and integration with other components, allowing the device to maintain thinness while achieving adequate structural strength.
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 solution enables a simpler and faster assembly process, resulting in a compact LCD module with improved light distribution and uniformity, facilitating automation and reducing manufacturing time.
Implementation Method 1
a plurality of point light source elements connected to the PCB
Data Source
AI summary
A liquid crystal display (“LCD”) module includes a liquid crystal panel, a mold frame provided below the liquid crystal panel and supporting the liquid crystal panel, a light guide plate provided below the mold frame, and a light source assembly coupled to an outside of the mold frame to accommodate the light guide plate therein, the light source assembly partially inserted into the mold frame, and supplying light to the light guide plate.