DMD Module Circuit Board With Spring Contacts for Peltier Element
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Solution Overview
Problem
The existing DMD modules require additional complex work steps for mounting and electrical connection of the Peltier element, increasing assembly costs and reducing reliability.
Innovation Solution
A circuit board with a recess for the Peltier element and spring contacts for electrical connection, along with retaining bolts and coil springs to securely hold the components together, simplifies the assembly process and enhances reliability by providing secure power supply and higher current capabilities.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a Peltier element is inserted between the DMD element and heat sink for improved cooling, then cooling performance is improved, but assembly complexity and work steps increase
Solution Approach 1:
The circuit board is merged with multiple functions: it serves as the electrical connection carrier for the Peltier element, the mounting structure for the heat sink, and the structural support for the entire assembly. The spring contacts are integrated directly onto the circuit board, eliminating the need for separate connection components and reducing assembly steps.
Solution Approach 2:
The circuit board performs multiple functions simultaneously: electrical connection (via spring contacts), mechanical support (for heat sink and Peltier element), and structural assembly (as the base for mounting). This multi-functionality reduces the number of separate components needed and simplifies the overall assembly process.
2Temperature
If a Peltier element is inserted between the DMD element and heat sink for improved cooling, then cooling performance is improved, but manufacturing costs increase
Solution Approach 1:
By combining multiple functions into the circuit board (electrical connection, mechanical support, mounting structure), the total number of components is reduced. This reduces manufacturing complexity, assembly time, and overall production costs despite the addition of the Peltier element.
Solution Approach 2:
The spring contacts on the circuit board automatically establish electrical connections with the Peltier element through resilient contact, eliminating the need for separate wiring and connection steps. The circuit board itself serves as the mounting structure, reducing the need for additional fastening components.
3Device complexity
If traditional electrical connection methods are used for the Peltier element, then assembly is simpler, but reliability is reduced
Solution Approach 1:
The spring contacts provide a dynamic, resilient connection that maintains constant electrical contact with the Peltier element. The spring force compensates for manufacturing tolerances, thermal expansion, and vibration, ensuring reliable electrical connection without requiring complex assembly procedures.
Solution Approach 2:
The spring contacts are pre-loaded with resilient force to compensate for potential connection issues before they occur. This pre-compression ensures maintained electrical contact under various operating conditions (temperature changes, vibration, etc.) without requiring adjustment or intervention.
4Reliability
If multiple spring contacts are used for power supply to the Peltier element, then reliability and current capability are increased, but device complexity increases
Solution Approach 1:
Multiple spring contacts are integrated directly onto the circuit board in a compact arrangement. This merging of multiple connection points into a single structural element (the circuit board) provides enhanced reliability and current capability without significantly increasing overall device complexity.
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 solution simplifies the assembly of DMD modules, reduces costs, and increases reliability by using a circuit board with spring contacts and retaining bolts to securely connect and hold the Peltier element, heat sink, and DMD element, allowing for efficient cooling and power supply.
Implementation Method 1
a plate-shaped Peltier element, one side of which rests thermally conductively on the back of the DMD element
Implementation Method 2
the heat is dissipated to the heat sink on its hot side during cooling operation and the heat of the DMD element is conducted to the cool side of the Peltier element
Implementation Method 3
spring contacts and contact surfaces associated therewith are provided for the electrical connection of the Peltier element to the printed circuit board, wherein, when the DMD module is assembled, the spring contacts rest resiliently against the contact surfaces
Implementation Method 4
retaining bolts project from the retaining frame, passing through the circuit board with the at least two spring contacts and the heat sink, which retaining bolts have stops for coil springs at their free ends, which are located between the stops and the heat sink and resiliently hold the heat sink, the Peltier element and the DMD element together
Data Source
Figure 1~2
Figure 3~4
Figure 5~6
AI summary
A DMD module (1) comprising a mounting frame (2), a DMD element (3) inserted therein, a plate-shaped Peltier element (6) which is in thermally conductive contact with the rear of the DMD element at one side and has electrical connections, and a heat sink (7) which is in thermally conductive contact with the other side of the Peltier element, wherein a circuit board (5) is arranged between the DMD element (3) and the heat sink (7), which has a recess (10) for the Peltier element (6) and spring contacts (11 a,b, 12 a,b) and associated contact surfaces (8, 9) are provided for the electrical connection of the Peltier element to the circuit board, wherein, when the DMD module is assembled, the spring contacts bear resiliently against the contact surfaces.