Driver Circuit Variable Power Supply Heat Reduction
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Solution Overview
Problem
In processing devices that use light emitting devices, such as laser exposure or machining devices, the heat generation in current-control switching devices reduces their lifetime, and large-capacity cooling mechanisms increase size and manufacturing costs, necessitating a reduction in heat generation with a simple configuration.
Innovation Solution
A driver circuit with a variable power supply, current-control switching device, detection part, and control part that determines the minimum power supply voltage based on detected current and voltage values to control current flow in the light emitting device, thereby reducing heat generation and power consumption.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Temperature
If a large-capacity cooling mechanism is provided to cool the switching device for current-control, then the heat generation problem is solved, but the size of the driver circuit and manufacturing cost increase
Solution Approach 1:
The power supply voltage is dynamically adjusted based on the operating conditions of the light emitting device. By varying the voltage according to detection results, the current through the switching device is optimized to reduce heat generation while maintaining proper operation, eliminating the need for large cooling mechanisms
Solution Approach 2:
The invention changes the power supply voltage parameter from a fixed value to a variable value that is adjusted based on detection results. This parameter change allows the switching device to operate at optimal current levels, reducing heat generation without requiring additional cooling infrastructure
2Temperature
If a large-capacity cooling mechanism is provided to cool the switching device for current-control, then the heat generation problem is solved, but manufacturing cost increases
Solution Approach 1:
The invention extracts the cooling mechanism from the driver circuit by eliminating the need for large-capacity cooling components. Instead of adding cooling infrastructure, the solution removes the requirement for such mechanisms by optimizing the electrical parameters to reduce heat generation at the source
3Reliability
If the power supply voltage is increased to ensure sufficient current flow, then the light emitting device operates reliably, but heat generation in the switching device increases
Solution Approach 1:
The detection part monitors the operating conditions of the light emitting device and provides feedback to the control part. Based on this feedback, the power supply voltage is adjusted to the minimum necessary level to ensure reliable operation, preventing excessive current and heat generation in the switching device
Solution Approach 2:
Instead of applying a fixed high voltage that ensures operation but causes excessive heat, the invention applies just enough voltage (partial action) to achieve reliable operation. The voltage is adjusted to the minimum necessary level, avoiding the excessive action that would generate unnecessary heat
Data Source
AI summary
A driver circuit includes: a variable power supply configured to apply a power supply voltage to a light emitting device and to vary a voltage value of the power supply voltage; a current-control switching device electrically connected to the light emitting device and configured to control a current flowing in the light emitting device; a detection part configured to detect a current value and a voltage value related to the current flowing in the light emitting device; and a control part configured to determine a minimum voltage of the power supply voltage based on a detection result of the detection part.