Mold-Free LCD Backlight Assembly via Terminal Frame Integration
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Solution Overview
Problem
Conventional liquid crystal display devices require a mold frame that increases bezel width, leading to higher production costs and reduced product competitiveness.
Innovation Solution
A mold-frame-free liquid crystal display device design that uses a terminal frame, reflector plate, light guide plate, and optical film assembly, with a liquid crystal display panel having a double-sized adhesive tape to circumferentially surround the effective display area, eliminating the need for a backlighting mold frame and allowing for reduced bezel width and increased integration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If a mold frame is used in the backlight module, then the structural stability and ease of assembly are improved, but the bezel width increases and manufacturing cost increases
Solution Approach 1:
The patent removes the mold frame from the backlight module structure, extracting the problematic component that caused increased bezel width. The backlight module is reconfigured to assemble components directly on the terminal frame without requiring a separate mold frame, thereby reducing the overall bezel width while maintaining functional integrity through alternative positioning methods.
Solution Approach 2:
The patent merges the mold frame function into the terminal frame structure. Instead of having separate mold frame and terminal frame components, the terminal frame is designed to directly support and position the backlight module components (light guide plate, diffuser plate, reflector), combining the structural support and component positioning functions into a single integrated frame.
2Ease of manufacture
If a mold frame is used in the backlight module, then the assembly process is simplified, but the manufacturing cost increases and productivity decreases
Solution Approach 1:
By removing the mold frame, the patent eliminates the additional assembly step of installing the mold frame before assembling backlight module components. Components are assembled directly onto the terminal frame, reducing the number of parts to handle and simplifying the assembly process, which improves manufacturing efficiency and reduces costs.
Solution Approach 2:
The integration of structural support and component positioning functions into the terminal frame reduces the total number of components and assembly steps. This merging eliminates the need to separately assemble the mold frame and then mount components within it, streamlining the manufacturing process and improving productivity.
3Manufacturing precision
If a mold frame is used, then the positioning of backlight components is facilitated, but the bezel width and device complexity increase
Solution Approach 1:
The terminal frame is designed with integrated positioning structures that combine the functions of the mold frame (component positioning and support) with the terminal frame structure. This integration maintains precise component positioning while reducing overall structural complexity by eliminating redundant framing elements.
Solution Approach 2:
The terminal frame incorporates localized positioning features (such as positioning ribs, recesses, or adhesive areas) at specific locations where components need to be precisely positioned. This approach provides necessary positioning accuracy only where required, rather than using a comprehensive mold frame structure, thereby reducing overall device complexity while maintaining manufacturing precision.
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 reduces bezel width, lowers production costs, and enhances assembly accuracy and product competitiveness by integrating the backlight module with the liquid crystal display panel and terminal frame without the need for a mold frame.
Implementation Method 1
a first double-sided adhesive tape 110 which is adhesively attached to a lower surface of the liquid crystal display panel 2
Implementation Method 2
a light guide plate 11, a backlight source 12 disposed at one side of the light guide plate 11
Implementation Method 3
an optical film assembly 15 disposed on an upper surface of the light guide plate 11. The optical film assembly 15 comprises, disposed from bottom to top, a diffuser plate 151
Data Source
AI summary
The present invention provides a mold-frame-free liquid crystal display device and an assembly method thereof, in which a lower surface of a liquid crystal display panel (2) is provided with a first double-sized adhesive tape (110) that circumferentially surrounds an effective display area (21) and an optical film assembly (15) is adhesively attached to the first double-sized adhesive tape (110) and a reflector plate (14) and a light guide plate (11) are sequentially disposed inside the terminal frame (4) and, finally, the liquid crystal display panel (2) that includes the optical film assembly (15) attached thereto and the terminal frame (4) with the reflector plate (14) and the light guide plate (11) disposed therein are assembled together, whereby a backlighting mold frame can be omitted, the cost can be reduced, and a bezel width of a liquid crystal display device can be effectively reduced to realize narrow bezel of the liquid crystal display device, increase product competition power, allow the backlight module to be assembled with the liquid crystal display panel and the terminal frame to increase the degree of integration of the liquid crystal display panel and improve accuracy of assembly.