Tablet Step-Up Circuit for External Device Charging
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Solution Overview
Problem
Tablet computers with small battery voltage and current cannot simultaneously power their internal processor and circuit while charging external devices that require more than 500 mA, leading to insufficient power supply for both internal components and external devices.
Innovation Solution
Incorporating a voltage regulator circuit with a step-up circuit to raise the battery voltage for charging external devices, and a step-down circuit to manage charging voltage for the tablet computer's battery, along with protection circuits to prevent overcharging and over-discharging, allowing the tablet computer to charge external devices and maintain its own battery health.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Power
If the battery voltage is kept small to power internal processor and circuit, then the internal components can operate, but the current is insufficient (not larger than 500 mA) to charge external devices simultaneously
Solution Approach 1:
The patent applies parameter changes by introducing a step-up circuit that transforms the battery's low voltage (3.7V) into a higher voltage capable of delivering sufficient charging current (greater than 500mA) to external devices, while the step-down circuit transforms external charging voltage into battery-compatible voltage levels, enabling the system to adapt to different power requirements dynamically
2Adaptability or versatility
If a step-up circuit is added to raise battery voltage for charging external devices, then external device charging is enabled, but the device complexity increases
Solution Approach 1:
The patent implements multi-functionality by designing the voltage regulator circuit with both step-up and step-down circuits, allowing the same circuit architecture to handle multiple functions: charging external devices via step-up transformation and receiving external charging via step-down transformation, thereby reducing the need for separate dedicated circuits for each function
3Use of energy by moving object
If the battery supplies power to both internal processor and external device simultaneously, then both can operate, but the current distribution becomes insufficient for high-power external devices
Solution Approach 1:
The patent resolves power distribution limitations by using the step-up circuit to increase voltage for external device charging, which allows higher power delivery without exceeding the battery's current capacity, effectively decoupling the power limitation from the battery's native voltage-current characteristics
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
Enables the tablet computer to charge external devices with higher power requirements without compromising its internal power supply, ensuring continuous operation and eliminating the need for a separate portable power source.
Implementation Method 1
the voltage regulator circuit includes a step-up circuit for raising a voltage supplied by the battery
Implementation Method 2
the voltage regulator circuit further includes a step-down circuit for lowering a voltage to be input into the battery
Data Source
AI summary
The present disclosure provides a tablet computer. The tablet computer includes a battery and a voltage regulator circuit, wherein the voltage regulator circuit includes a step-up circuit for raising a voltage supplied by the battery in order to utilizing the raised voltage to charge an external device connected with the tablet computer.