Sensor Driver Signal Segmentation for Proximity and Biometric Sensing
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Solution Overview
Problem
Existing display devices struggle to effectively determine the proximity of an object and measure biometric information, such as hydration, with high accuracy and efficiency.
Innovation Solution
A display device comprising a display panel, a sensor layer overlapping the display panel, and a sensor driver that transmits different driving signals to detect touch and proximity sensing areas, allowing for accurate proximity detection and biometric information measurement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a single sensing mode is used, then the device structure is simple, but the ability to determine proximity and measure biometric information is insufficient
Solution Approach 1:
The sensor layer is designed to perform multiple sensing functions (touch sensing, proximity sensing, and biometric information measurement) using a single unified structure. The same sensor layer and driving circuitry are utilized across different sensing modes, achieving multi-functionality without proportionally increasing device complexity.
Solution Approach 2:
The sensing system dynamically switches between different sensing modes (first mode for touch sensing, second mode for proximity sensing) by changing the driving signal characteristics. This dynamic adaptability allows the system to optimize performance for different sensing tasks while maintaining a relatively simple fixed structure.
2Measurement precision
If different driving signals are transmitted for different sensing areas, then sensing accuracy is improved, but signal transmission complexity increases
Solution Approach 1:
The sensing area is divided into different regions (first sensing area for touch, second sensing area for proximity) with different driving signals transmitted to each region. This segmentation allows optimized sensing accuracy for each specific sensing task while maintaining manageable signal transmission complexity through systematic signal management.
3Speed
If high transmission rate is used for first driving signal, then touch detection speed is improved, but power consumption increases
Solution Approach 1:
The transmission rate of the first driving signal is dynamically adjusted based on the operational mode. In the first mode, a higher transmission rate is used for fast touch detection, while in the second mode, the transmission rate is reduced for proximity sensing, thereby optimizing power consumption according to the specific sensing task being performed.
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 enables more effective proximity detection and biometric information measurement, improving the device's ability to determine object proximity and measure hydration accurately.
Implementation Method 1
the sensor panel for sensing a touch position... may be used to check whether the object is in proximity to the sensor panel
Data Source
AI summary
A display device includes a display panel. The display panel includes pixels. A sensor layer overlaps the display panel and includes sensors. A sensor driver is configured to transmit a driving signal to the sensors and receive sensing signals from the sensors. The sensor driver is configured to transmit a first driving signal to the sensors to detect a first sensing area where a touch occurs in a first mode, and to transmit a second driving signal to at least a portion of the sensors corresponding to a second sensing area different from the first sensing area in a second mode.