3D PCB Layout for Compact Endoscopic Camera Head Modules
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Solution Overview
Problem
The existing endoscopic devices face challenges in downsizing due to the need for a single printed board to perform both imaging signal and control signal relay functions, necessitating increased board size.
Innovation Solution
A photoelectric composite module with a first printed board for imaging signal conversion and a second flexible printed board for control signal relay, arranged in different planes and overlapping configurations, reducing the size of each board and enabling three-dimensional arrangement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single printed board is used to relay both imaging signals and control signals, then the device structure is simplified, but the printed board size increases making downsizing difficult
Solution Approach 1:
The single printed board is divided into two separate printed boards: a first printed board for relaying imaging signals and a second printed board for relaying control signals. This segmentation allows each board to be smaller in area while maintaining all necessary functions, thus resolving the contradiction between structural simplicity and board size.
2Area of stationary object
If the printed board area is reduced for downsizing, then the camera head size decreases, but the relay functions for imaging and control signals must be consolidated
Solution Approach 1:
By segmenting the relay functions onto two separate printed boards, each board can be minimized in area for its specific function. The first printed board handles imaging signal relay with minimal area requirements, while the second printed board handles control signal relay separately, allowing both to be compact.
Solution Approach 2:
The two printed boards are arranged in a three-dimensional configuration rather than being stacked in the same plane. This spatial arrangement in different dimensions allows both boards to coexist in a compact volume without requiring excessive area in any single plane, enabling downsizing while maintaining functional separation.
3Adaptability or versatility
If a photoelectric conversion element is mounted on the printed board, then imaging signal conversion is enabled, but the board size must accommodate the mounting area
Solution Approach 1:
The photoelectric conversion element is mounted on the first printed board which is dedicated to imaging signal relay. This segmentation concentrates the photoelectric conversion function and its associated mounting area on a single board, allowing the second printed board to remain compact for control signal relay, and enabling overall downsizing through optimized area allocation.
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 downsized photoelectric composite module allows for a compact camera head and endoscopic device design by separating imaging and control signal relays onto distinct boards, achieving a more compact form factor.
Implementation Method 1
a photoelectric conversion element converting, into optical signals, imaging signals (electrical signals) output by the image sensor
Data Source
AI summary
There is provided a photoelectric composite module according to the present disclosure including: a first connecting member having an outer frame having a tubular shape, and a plurality of contacts provided in an interior of the outer frame; a first printed board on which a photoelectric conversion element configured to convert an electrical signal into an optical signal is mounted, and which is configured to act as a relay between the contacts and the photoelectric conversion element; and a second printed board configured to act as a relay between the contacts and an electrical signal cable. The first printed board and the second printed board are three-dimensionally arranged.