LCD Front Frame with Injection-Molded Buffer for Secure Assembly
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Solution Overview
Problem
The existing methods for assembling LCDs, particularly the use of soft adhesive materials and manual attachment of protective films, are time-consuming, labor-intensive, and affect the optical performance and reliability of the display due to position shifts and friction-related issues during assembly.
Innovation Solution
The implementation of a front frame with injection-molded buffer materials, featuring multiple portions and holes, to securely connect the liquid crystal array cell module and backlight module, and a back bezel with buffer materials in holes and through holes to firmly integrate the light source and light guide plate, enhancing attachment and reducing manufacturing costs.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual attachment of protective film is used on back bezel, then protection against crumbing is achieved, but manufacturing cost and time increase due to large attachment area requiring manpower
Solution Approach 1:
The protective film attachment function is extracted from the back bezel and transferred to the front frame body. The buffer material on the front frame body provides the protective function, eliminating the need for separate protective film attachment on the back bezel, thereby reducing manpower and manufacturing cost while maintaining protection against crumbing
Solution Approach 2:
The protective function previously separate (protective film on back bezel) is merged with the buffer material function on the front frame body. The buffer material serves both as a cushioning element and as the protective component, consolidating multiple functions into a single structure
2Reliability
If soft adhesive material is used to buffer between front frame and liquid crystal array cell module, then protection against friction damage is achieved, but position shift occurs during assembly affecting optical performance
Solution Approach 1:
The buffer material is pre-formed with protruding portions that fit into corresponding recesses on the liquid crystal array cell module before final assembly. This preliminary positioning structure ensures accurate alignment is maintained during the buffering process, preventing position shift while still providing friction protection
Solution Approach 2:
The buffer material is designed with localized protruding portions at specific positions rather than a uniform soft adhesive layer. This localized structure provides buffering protection exactly where needed while maintaining precise positional relationships through the protrusion-recess fitting mechanism
3Object-affected harmful factors
If protective film is attached to back bezel body to avoid crumbing, then display quality is protected, but large attachment area requires significant manpower and increases manufacturing cost
Solution Approach 1:
The crumbing prevention function is extracted from the back bezel protective film and relocated to the front frame body buffer material. This eliminates the need for costly protective film attachment operations on the back bezel while maintaining the same protective effect against crumbing during assembly
Solution Approach 2:
The invention eliminates the need for expensive protective film materials and their associated attachment processes by using the existing buffer material structure on the front frame body, which provides equivalent protection at lower material and labor costs
Data Source
AI summary
A liquid crystal display (LCD) includes a backlight module, a cell module installed in front of the backlight module, and a front frame which includes a frame body with holes and buffer material. The buffer material has a first part disposed in the holes and fixed to the cell module and backlight module through the front frame, and a second part sandwiched between the frame body and cell module. A method for manufacturing a LCD device is also provided, including forming a buffer material on a frame body by injection molding, firmly connecting the frame body, a cell module, and a backlight module, and locating the buffer material between the frame body and cell module.