Handwriting Recognition Frequency Control for Power Optimization
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Solution Overview
Problem
Existing display apparatuses that convert handwriting data into characters using handwriting recognition techniques consume excessive power, leading to reduced battery life and increased charging time, as recognition processing is not controlled based on the power supply state.
Innovation Solution
The display apparatus includes an accepting unit for inputting handwriting data, a recognizing unit for performing recognition processing, and a controller that adjusts the frequency of recognition processing according to the power supply state, optimizing power usage by switching between batch, low-frequency, and high-frequency modes based on battery, charging, and AC power states.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If recognition processing is executed continuously regardless of power supply state, then handwriting recognition accuracy is maintained, but power consumption increases
Solution Approach 1:
The patent applies dynamics by making the recognition processing frequency adjustable based on power supply state. The controller dynamically changes the processing frequency between high frequency (when AC power is supplied) and low frequency (when battery power is used), resolving the contradiction between maintaining recognition accuracy and reducing power consumption.
Solution Approach 2:
The patent changes the parameter of processing frequency based on power supply conditions. When AC power is detected, the system operates at high processing frequency; when battery power is detected, it switches to low processing frequency. This parameter change resolves the contradiction by adapting system performance to available power resources.
2Speed
If recognition processing is executed at high frequency, then response speed is improved, but battery operating time decreases
Solution Approach 1:
The system dynamically adjusts processing frequency based on power source detection. When AC power is supplied, high-frequency processing provides fast recognition response. When battery power is used, low-frequency processing extends battery life. This dynamic adaptation resolves the contradiction between speed and duration.
Solution Approach 2:
The patent implements periodic recognition processing at different frequencies depending on power state. Instead of continuous high-frequency processing, the system uses periodic processing with adjusted intervals, reducing overall power consumption while maintaining acceptable response times.
3Productivity
If recognition processing is executed continuously, then processing completeness is maintained, but charging time increases
Solution Approach 1:
The controller dynamically adjusts processing frequency based on whether AC power is supplied. During AC charging, the system can afford higher processing frequencies to maintain completeness. During battery operation, reduced frequency minimizes power draw and charging time. This resolves the contradiction between processing completeness and charging time.
4Reliability
If a battery with large capacity is used to support continuous recognition processing, then power supply stability is improved, but device weight increases
Solution Approach 1:
Instead of relying on a large-capacity battery to maintain continuous high-frequency processing, the system dynamically adjusts processing frequency to match available power. This approach maintains power supply stability through adaptive control rather than through battery capacity, avoiding the weight penalty of a larger battery.
Data Source
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AI summary
A display apparatus (2) includes: an accepting unit (21) configured to accept input of handwriting data input by an input unit; a recognizing unit (26) configured to perform recognition processing of the handwriting data; and a controller (23) configured to control frequency of the recognition processing in accordance with a power supply state of the display apparatus (2). A control method performed by the display apparatus, and carrier means carrying computer readable code for controlling a computer system to perform the control method are also disclosed.