Thin LCD Front Shell PCB Mounting Structure
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Solution Overview
Problem
Conventional liquid crystal display devices face challenges in thinning due to the placement of printed circuit boards (PCBs) behind the liquid crystal display module, increasing device thickness and complicating maintenance, while integrated PCBs reduce thickness but are costly.
Innovation Solution
A thin liquid crystal display device design featuring a mounting seat and frame on the front shell that stacks PCBs in a stepwise configuration, allowing for reduced space usage and easy maintenance by using a separate cover plate for dust protection and aesthetics.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Length of moving object
If PCBs are arranged behind the liquid crystal display module, then the device structure is simple, but the overall thickness of the device is increased
Solution Approach 1:
The patent transitions from arranging PCBs in a planar configuration behind the display module to a three-dimensional stacked arrangement on the front surface. Multiple PCBs are vertically stacked and fixed to the front shell within a mounting frame, utilizing the Z-dimension to reduce the device's overall thickness while maintaining all necessary circuit functions.
Solution Approach 2:
The patent divides the mounting structure into separate functional components: a mounting frame fixed to the front shell, multiple stacked PCBs for different functions (liquid crystal driving control, frequency conversion control, A/D conversion), and a cover plate for protection. This segmentation allows independent optimization of each component and facilitates maintenance.
2Ease of repair
If PCBs are arranged behind the liquid crystal display module, then the structure is straightforward, but maintenance operation becomes complicated
Solution Approach 1:
The patent extracts the PCB assembly from the traditional rear-mounted configuration and relocates it to the front surface within an accessible mounting frame. The cover plate design allows the entire PCB stack to be easily removed and replaced by simply detaching the cover plate, without requiring disassembly of the rear shell or display module.
Solution Approach 2:
The mounting frame serves as an intermediary structure between the front shell and the stacked PCBs. It provides a standardized interface for fixing multiple PCBs in a compact stack and enables easy removal and installation of the entire PCB assembly as a unit, simplifying maintenance operations.
3Length of moving object
If integrated PCBs are used, then device thickness is reduced, but manufacturing cost increases
Solution Approach 1:
The patent merges multiple separate PCBs (liquid crystal driving control PCB, frequency conversion control PCB, A/D conversion PCB) into a compact stacked arrangement within a single mounting frame. This allows each PCB to be manufactured and tested independently using standard processes, then assembled together, avoiding the high cost of custom integrated circuits while achieving space efficiency.
Data Source
AI summary
The present invention provides a thin liquid crystal display device including a body, a mounting seat mounted to the body, a mounting frame arranged inside the mounting seat, a plurality of circuit boards mounted to the mounting frame and electrically connected to the body, and a cover plate covering the mounting seat. The thin liquid crystal display device of the present invention provides a mounting seat that is mounted to a front shell and located at one side of the body of the liquid crystal display device. The mounting seat receives and retains therein the mounting frame for mounting a plurality of PCBs so that the amount of space required for mounting the PCBs is reduced and overall thinning of the liquid crystal display device is facilitated.