Handheld Mobile Phone Multi-Button Reset Logic Circuit
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Solution Overview
Problem
Conventional handheld mobile devices, such as smartphones and PDAs, often require a separate reset button that is inconvenient to access without a stylus, especially for devices with capacitive touch screens, leading to unnecessary trouble for users.
Innovation Solution
A method and handheld mobile phone design that utilize at least two physical buttons to generate specific signals for executing functions, including a reset state, eliminating the need for a dedicated reset button by using a logic circuit and processing unit to control the device's state transition when multiple buttons are pressed simultaneously.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a separate reset button is provided in a small hole, then the reset function can be implemented, but the user must use a stylus to access it, which causes unnecessary trouble and inconvenience
Solution Approach 1:
The patent combines the reset function with existing buttons by detecting simultaneous presses of multiple buttons (e.g., power button and volume button) to trigger a reset, eliminating the need for a separate reset button and its associated stylus requirement
Solution Approach 2:
Existing buttons are made multi-functional: the power button and volume button not only serve their original functions but also work together as a reset mechanism when pressed simultaneously, maximizing the utility of available components
2Reliability
If a separate reset button is provided, then the reset function is available, but it increases device complexity and cost
Solution Approach 1:
The reset functionality is merged into the existing button system, using the power button and volume button in combination to achieve reset without adding a separate dedicated reset button
Solution Approach 2:
The system uses its own existing buttons to perform the reset function that would otherwise require a separate component, making the device self-sufficient and eliminating additional hardware needs
3Reliability
If a stylus is required to press the reset button, then erroneous pressing is prevented, but user convenience is significantly reduced
Solution Approach 1:
The system prevents erroneous resets by requiring a specific combination of button presses (power button + volume button) rather than allowing accidental activation of a single hidden reset button, while still maintaining ease of use through the multi-button combination
Data Source
AI summary
A handheld mobile phone includes at least two buttons, a logic circuit, and a processing unit, wherein each button is used for performing at least one specific function. The logic circuit is coupled to the at least two buttons for generating a corresponding specific signal when one of the at least two buttons is pressed alone, and for generating at least a control signal when all of the at least two buttons are pressed. The processing unit executes the specific function of the pressed button according to the corresponding specific signal. When all of the at least two buttons are pressed, the processing unit controls the handheld mobile phone to enter a reset state from an operating state according to at least the control signal.