Multi-panel Display PCBA-to-PCBA Interface for Seam Alignment
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Solution Overview
Problem
Conventional multi-panel displays face challenges in maintaining even pixel spacing across the entire display due to inconsistencies in the housing material, leading to seams and reduced pixel pitch between adjacent panels, which affects image quality and increases production costs.
Innovation Solution
The implementation of a PCBA-to-PCBA interface between adjacent panels, where the printed circuit board assembly (PCBA) of each panel overhangs the housing framing portions, allowing for tighter seam alignment and maintaining a seal to protect circuitry, while using plastic for the housing to keep costs and weight low.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Manufacturing precision
If conventional housing materials (aluminum or carbon fiber) with tighter tolerances are used, then manufacturing precision of pixel spacing is improved, but production cost and panel weight increase
Solution Approach 1:
The display system is segmented into multiple independent panels, each with its own housing and PCBA. The housing framing portions are designed to interface with adjacent panels' PCBAs directly, allowing each panel to be manufactured independently with standard tolerances while achieving overall precision through the modular assembly approach
Solution Approach 2:
The PCBA serves as an intermediary element between the housing and adjacent panels. The PCBA extends beyond the housing framing portions to physically contact and align with adjacent panels' PCBAs, acting as a precision interface that compensates for housing material tolerances and ensures consistent pixel spacing across panel boundaries
2Manufacturing precision
If conventional housing materials (aluminum or carbon fiber) with tighter tolerances are used, then manufacturing precision of pixel spacing is improved, but panel weight increases
Solution Approach 1:
The display is divided into multiple lightweight panels with plastic housings. Each panel's housing framing portions are segmented to allow direct PCBA-to-PCBA interfacing, eliminating the need for heavy continuous framing structures while maintaining alignment precision through the modular design
Solution Approach 2:
The PCBA acts as a lightweight intermediary structure that provides precision alignment between adjacent panels. By extending the PCBA beyond the housing framing portions, the design uses the rigid but lightweight PCBA material to ensure consistent pixel spacing without requiring heavy housing materials
3Manufacturing precision
If PCBA-to-PCBA interface is implemented, then manufacturing precision of pixel spacing is improved, but device complexity increases
Solution Approach 1:
The housing framing portions and PCBA are merged into an integrated structure where the PCBA extends beyond the housing to provide both structural support and precision interfacing functions. This combination eliminates the need for separate alignment mechanisms and reduces overall interface complexity
Solution Approach 2:
The PCBA serves multiple functions: electrical connectivity within the panel, structural support for the display elements, and precision alignment interface with adjacent panels. This multi-functionality reduces the need for additional components and simplifies the overall interface design between panels
Data Source
AI summary
An embodiment display panel includes a housing comprising a recess and framing portions, a printed circuit board (PCB), a sealing material, and a plurality of light emitting diodes (LEDs). The PCB is attached to and overhangs the framing portions of the housing. The PCB includes a front side and an opposite back side. The recess overlies the opposite back side of the PCB. The sealing material is disposed between the opposite back side of the PCB and the framing portions of the housing. The plurality of LEDs is disposed at the front side of the PCB. The front side of the PCB forms an entirety of a front surface of the display panel.