Driving Circuitry Dynamic Voltage Switching for Heat Reduction
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Solution Overview
Problem
Integrated circuits used in electronic apparatuses, such as inkjet recording devices, face increased heat generation due to voltage conversion losses, leading to malfunction and potential shutdown of the DC/DC converter and subsequent disruption of the apparatus operation, especially when the difference between input and output voltages is significant.
Innovation Solution
The implementation of a driving circuitry with a regulator and power source switch that allows switching between two DC voltages, enabling the use of a lower DC voltage when suitable, thereby reducing heat generation and maintaining efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a DC/DC converter circuit is used to convert input voltage to lower output voltage, then voltage regulation is achieved, but heat generation increases due to conversion loss
Solution Approach 1:
The patent implements dynamic switching between two different input voltage sources (first DC voltage and second DC voltage) based on operational conditions. The voltage selection is not static but changes dynamically to optimize performance, allowing the system to switch to a higher voltage source when lower heat generation is needed and to a lower voltage source when efficiency is prioritized.
Solution Approach 2:
The invention changes the input voltage parameter of the DC/DC converter by providing two different DC voltage sources instead of using a single fixed voltage. This parameter change allows the system to adjust the voltage difference input-output, thereby controlling the conversion loss and heat generation according to different operational requirements.
2Use of energy by moving object
If the difference between input voltage and output voltage is increased, then power conversion efficiency improves, but heat generation increases causing malfunction
Solution Approach 1:
The system dynamically adjusts the input voltage to the DC/DC converter based on real-time conditions. When high efficiency is needed, the system can select a higher input voltage to increase the voltage difference and improve conversion efficiency. When heat generation becomes problematic, the system switches to a lower input voltage to reduce the voltage difference and consequently reduce heat generation, preventing malfunction.
Solution Approach 2:
By providing two different DC voltage sources with different voltage levels, the system can change the input voltage parameter to the DC/DC converter. This allows optimization of the voltage conversion ratio to balance between conversion efficiency and heat generation, selecting the appropriate voltage source based on the specific operational context.
3Device complexity
If a single DC voltage is supplied to the regulator means, then circuit design is simplified, but heat generation cannot be reduced when voltage difference is large
Solution Approach 1:
The patent introduces dynamic voltage source selection with switching control, which adds control logic but enables heat reduction. The switching mechanism allows the system to adaptively choose between two voltage sources based on thermal conditions or efficiency requirements, resolving the contradiction between design simplicity and heat management.
Solution Approach 2:
The switching control circuit acts as an intermediary between the two voltage sources and the DC/DC converter. This intermediary component manages the complexity by providing a systematic way to select the appropriate voltage source, balancing the added circuit complexity against the benefit of reduced heat generation through optimized voltage selection.
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
This solution reduces the temperature of the integrated circuit by approximately 13.5°C, ensuring continuous operation of the electronic apparatus by minimizing heat-related malfunctions and maintaining stable voltage supply.
Implementation Method 1
a voltage conversion circuit for decreasing a DC voltage... heat generation due to conversion loss of a voltage is increased
Data Source
AI summary
Driving circuitry having driving means for driving a load using a first DC voltage, regulator means for receiving an input voltage and deriving a regulated output voltage from the input voltage, and power source switch means switchable between a first state in which the first DC voltage is supplied to the regulator means as the input voltage and a second state in which a second DC voltage, lower than the first DC voltage and higher than the regulated output voltage, is supplied to the regulator means as the input voltage, second voltage deriving means for deriving the second DC voltage from the first DC voltage, and switch control means connected to the power source switch means for causing the power source switch means to switch from the first state to the second state when the second DC voltage is suitable for supply to the regulator means as the input voltage.