Power Supply Circuit Voltage Boosting for E-ink Display
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Electronic shelf labels with traditional power supply circuits require large capacitance capacitors to drive electrophoretic displays in low-temperature environments, leading to increased volume and cost due to the size and expense of Farad-level capacitors.
Innovation Solution
A power supply circuit comprising a boosting sub-circuit and a driving sub-circuit, where the boosting sub-circuit boosts the voltage of the power signal and the driving sub-circuit uses a microfarad-level capacitor to supply power to the electrophoretic display, reducing the overall volume and cost by eliminating the need for large capacitors.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If large capacitance capacitors (Farad-level) are used to drive electrophoretic displays in low-temperature environments, then the display operation reliability is improved, but the device volume and manufacturing cost increase
Solution Approach 1:
The patent changes the voltage parameter by introducing a boosting sub-circuit that increases the power source voltage. This voltage enhancement allows the system to achieve the required driving capability for electrophoretic displays in low-temperature environments without relying on large capacitance capacitors, thus maintaining reliability while reducing volume
Solution Approach 2:
The patent extracts and removes the large capacitance capacitor component from the traditional power supply circuit. By eliminating this bulky component and replacing it with a voltage boosting mechanism, the system achieves the same functional outcome with significantly reduced device volume
2Reliability
If large capacitance capacitors (Farad-level) are used to drive electrophoretic displays in low-temperature environments, then the display operation reliability is improved, but the manufacturing cost increases
Solution Approach 1:
The patent changes the voltage parameter through a boosting sub-circuit, enabling the system to achieve reliable display operation in low-temperature environments without requiring expensive Farad-level capacitors. This parameter change approach uses more cost-effective components to achieve the same reliability outcome
Solution Approach 2:
The patent removes the expensive large capacitance capacitor from the circuit design. By extracting this high-cost component and replacing it with a voltage boosting mechanism using smaller, cheaper components, the manufacturing cost is significantly reduced while maintaining display operation reliability
3Volume of stationary object
If voltage boosting is implemented, then the capacitor size can be reduced to microfarad-level, but the circuit complexity increases
Solution Approach 1:
The patent segments the power supply function into two distinct sub-circuits: a boosting sub-circuit for voltage enhancement and a driving sub-circuit for power delivery. This segmentation allows each sub-circuit to be optimized independently, with the boosting sub-circuit handling voltage transformation and the driving sub-circuit using only small microfarad-level capacitors, thus reducing overall complexity while achieving volume reduction
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 effectively reduces the volume and manufacturing cost of electronic shelf labels by using a microfarad-level capacitor in the driving sub-circuit, while ensuring the electrophoretic display operates properly with boosted voltage, thereby addressing the challenges of size and expense associated with traditional capacitors.
Implementation Method 1
the energy storage device stores an energy based on the power signal provided by the power source when the second terminal of the booster switch is in conduction with the third terminal thereof, and the energy storage device releases the stored energy when the second terminal of the booster switch is not in conduction with the third terminal thereof
Implementation Method 2
the power supply circuit includes capacitors, by which the electrical signal provided by the power source can be filtered to reduce the ripple voltage in the electrical signal provided by the power source
Data Source
AI summary
A power supply circuit and a display device are provided, belonging to the field of display technologies. The power supply circuit includes a boosting sub-circuit and a driving sub-circuit. The boosting sub-circuit may boost the voltage of the power signal provided by the power source; the driving sub-circuit may drive the load to work normally while ensuring that the capacitance of the capacitor in the driving sub-circuit is small when supplying power to the load with the power signal of which the voltage is boosted.