Keyboard Angle Detection Using Dual Tilt Sensors
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Solution Overview
Problem
Detachable 2-in-1 laptops face high electricity consumption and design complexity due to frequent sensor data reading and transmission to determine the angle between the tablet PC and keyboard, which reduces battery life.
Innovation Solution
A keyboard device with a main body, connection base, first tilt sensor, second tilt sensor, and processor that calculates angle difference data, reducing the need for frequent data transmission by determining the tilt status only when connected and using a low-power processor to minimize power consumption and design complexity.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If sensor data is read frequently and transmitted to the tablet PC for instant computing to obtain the angle between tablet PC and keyboard, then the angle detection precision is improved, but electricity consumption increases and design complexity increases
Solution Approach 1:
The patent extracts the angle calculation function from the tablet PC and relocates it to the keyboard device. The keyboard's processor independently calculates the angle using sensor data from both the tablet and keyboard, then transmits only the calculated angle to the tablet. This extraction eliminates the need for the tablet to frequently read and process raw sensor data, significantly reducing electricity consumption while maintaining angle detection precision.
Solution Approach 2:
The patent introduces an intermediary calculation process where the keyboard's processor acts as a mediator between the sensor data and the tablet PC. Instead of the tablet directly processing sensor data, the keyboard's processor intermediates by calculating the angle difference and transmitting only the result. This intermediary approach reduces data transmission frequency and processing load on the tablet, lowering electricity consumption.
2Measurement precision
If sensor data is read frequently and transmitted to the tablet PC for instant computing to obtain the angle between tablet PC and keyboard, then the angle detection precision is improved, but device complexity increases
Solution Approach 1:
The patent extracts the angle calculation function from the tablet PC system and relocates it to the keyboard device. By moving this computational task to the keyboard's processor, the tablet's system complexity is reduced. The keyboard now serves as an independent angle calculation unit, simplifying the overall system architecture while maintaining precise angle detection.
Solution Approach 2:
The keyboard device performs self-service by independently calculating the angle using its own processor and sensor data. The keyboard's processor reads sensor data, calculates the angle difference between the tablet and keyboard, and transmits only the result to the tablet. This self-service approach eliminates the need for the tablet to directly process sensor data, reducing design complexity while maintaining measurement precision.
3Measurement precision
If the keyboard device calculates angle difference data using a processor that consumes power, then the angle detection capability is improved, but electricity consumption increases
Solution Approach 1:
The patent implements periodic action by having the processor calculate angle difference data only when the keyboard is connected to the tablet and angle detection is needed, rather than continuously. The processor activates to perform calculations based on connection status and transmission requests, then enters low-power states. This periodic operation maintains angle detection capability while significantly reducing overall electricity consumption compared to continuous processing.
Solution Approach 2:
The patent replaces the traditional approach where the tablet's main processor handles angle calculation with a dedicated low-power processor in the keyboard device. This substitution uses a specialized processing unit that is optimized for this specific task and consumes less power than the tablet's main processor, while still providing accurate angle detection capability.
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 system design complexity and electricity consumption by calculating and transmitting angle difference data only when necessary, thereby extending battery life and simplifying the system design.
Implementation Method 1
The first tilt sensor is disposed on the main body and configured to generate first tilt data. The second tilt sensor is disposed on the connection base and configured to generate second tilt data.
Implementation Method 2
The keyboard device further includes a Hall effect sensor. The Hall effect sensor is disposed on the connection base and electrically connected to the processor. The processor is configured to calculate the angle difference data when the Hall effect sensor receives a magnetic signal from the electronic apparatus.
Data Source
AI summary
A keyboard device is applied to an electronic apparatus and includes a main body, a connection base, a first tilt sensor, a second tilt sensor, and a processor. The connection base is rotatably connected to the main body and configured to detachably be engaged to the electronic apparatus. The first tilt sensor is disposed on the main body and configured to generate first tilt data. The second tilt sensor is disposed on the connection base and configured to generate second tilt data. The processor is electrically connected to the first tilt sensor and the second tilt sensor, and is configured to calculate angle difference data according to the first tilt data and the second tilt data.