Circuit Board Inspection Terminals Side Surface Layout
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Solution Overview
Problem
The existing circuit boards in display devices have limited space for arranging electronic components and wirings due to the presence of inspection terminals used for measuring connection resistance, which reduces the available area for other components and wirings.
Innovation Solution
A circuit board design that includes a connection terminal on the front surface or inner layer, with multiple inspection terminals arranged on the side surface to measure resistance values, allowing for a larger area on the front surface for other components and wirings by positioning the inspection terminals on the side surface, such as in a recessed or projecting shape, and connecting them via connection wiring.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If inspection terminals are formed larger on the front surface to enable measurement jig abutment, then resistance measurement capability is improved, but the region for arranging other electronic components or wirings is reduced
Solution Approach 1:
The inspection terminals are relocated from the front surface to the side surface of the circuit board. This dimensional transition allows the measurement function to be maintained while freeing up the front surface area for other components and wirings, effectively resolving the spatial conflict between measurement terminals and functional components.
Solution Approach 2:
A connection wiring is introduced as an intermediary element that electrically connects the inspection terminals on the side surface to the connection terminal on the front surface. This mediator enables resistance measurement functionality to be preserved even when the inspection terminals are positioned on the side surface, thus maintaining measurement capability while optimizing space utilization.
2Area of stationary object
If inspection terminals are arranged on the side surface to increase front surface area, then space utilization is improved, but wiring resistance measurement accuracy may be affected
Solution Approach 1:
The connection wiring serves as an intermediary that bridges the inspection terminals on the side surface with the connection terminal on the front surface. This intermediary connection maintains the electrical continuity required for accurate resistance measurement, ensuring that the measurement precision is not compromised by the relocated terminal positions.
Solution Approach 2:
The connection wiring is designed with specific local characteristics (sufficient conductor cross-section and appropriate routing) to minimize its own resistance and ensure that it does not significantly affect the measurement accuracy. This local optimization ensures that the intermediary connection does not degrade the overall measurement precision.
Data Source
AI summary
Provided is a circuit board including inspection terminals, the circuit board including: a connection terminal, which is arranged on a front surface or in an inner layer of the circuit board, and is electrically connected to an object to be inspected; and three or more inspection terminals, which are electrically connected to the connection terminal, and are configured to measure a resistance value of the object be inspected, each of the three or more inspection terminals being arranged on a side surface of the circuit board.