Display-Integrated Sensor Control During Digital Pen Charging
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Solution Overview
Problem
The recognition rate of sensors in electronic devices is deteriorated due to noise caused by charging signals when charging digital pens, and there is interference between sensor signals and input detection panel signals, leading to failed pen input detection.
Innovation Solution
The electronic device embeds a sensor inside the display and uses a method to reduce interference from the conductive coil during pen charging, preventing sensor performance degradation by controlling the activation of the sensor and charging operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Use of energy by moving object
If the sensor is activated while charging the digital pen, then the charging function is provided, but the recognition rate of the sensor is deteriorated due to noise caused by charging signal
Solution Approach 1:
The patent implements dynamic control of the sensor activation state based on charging status. The processor dynamically adjusts whether the sensor can be activated depending on whether a digital pen is detected at the charging position, thereby resolving the contradiction between providing charging function and maintaining sensor recognition rate
Solution Approach 2:
The patent performs preliminary detection of digital pen presence at the charging position before allowing sensor activation. This preliminary action prevents the contradiction from occurring by proactively identifying the charging state and controlling sensor activation accordingly
2Reliability
If the sensor is activated, then sensor function is provided, but the electronic device fails to normally detect the input of the digital pen due to interference between sensor signal and input detection panel signal
Solution Approach 1:
The patent implements dynamic control of sensor activation based on digital pen input detection status. When digital pen input is detected, the sensor activation is controlled to prevent signal interference, thereby resolving the contradiction between providing sensor function and maintaining input detection capability
Solution Approach 2:
The patent uses feedback from the input detection panel to control sensor activation. The processor continuously monitors input detection status and adjusts sensor activation accordingly, creating a feedback loop that prevents signal interference while maintaining both functions
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
This approach enhances the recognition rate of digital pen inputs and maintains sensor performance by minimizing interference, ensuring reliable operation during pen charging.
Implementation Method 1
a conductive coil to generate a charging signal for charging a battery of the digital pen
Implementation Method 2
at least one of a proximity light sensor, or an image sensor provided in the display
Data Source
Figure 1
Figure 2a~2b
Figure 3~4
AI summary
An electronic device is provided. The electronic device includes a display, a input detection panel to detect an input of a digital pen, a sensor disposed to overlap the display and the input detection panel, when the display is viewed from a top, and at least one processor operatively connected with the display, the input detection panel, and the sensor. The at least one processor is to detect an attempt of activation of the sensor, activate the sensor and control at least a portion of a charging operation through the input detection panel, when the digital pen is positioned at a charging position, identify whether the input of the digital pen is detected, when the digital pen is not positioned at the charging position, deactivate the sensor, when the input of the digital pen is detected, or activate the sensor, when the input of the digital pen is not detected.