标题: 手势检测-Gesture Detection [打印本页] 作者: gaoxianqu 时间: 2015-12-28 10:10 标题: 手势检测-Gesture Detection The Gesture product features advanced Gesture detection, Proximity Detection, Digital Ambient Light Sensing (ALS), Color Sensing (RGBC), and optical pattern generation/transmission for Barcode broadcast. The IR Gesture sensor modules provide a highly integrated solution offering five essential functions for maximizing the end user experience in advanced communications and consumer electronics enabling a coherent display and touchless interface. Gesture detection utilizes four directional photodiodes to sense IR energy (sourced by the integrated LED) to convert physical motion information (i.e. velocity, direction and distance) to digital information. The Gesture engine incorporates a wide range of device gesture requirements and accurate sensing with minimized power consumption and noise through adjustable IR LED timing and enhanced gesture algorithms.
Gesture detection utilizes four directional photodiodes to sense reflected IR energy (sourced by the integrated LED) to convert physical motion information (i.e. velocity, direction and distance) to a digital information. The architecture of the gesture engine features automatic activation (based on Proximity engine results), ambient light subtraction, cross-talk cancelation, dual 8-bit data converters, power saving inter-conversion delay, 32-dataset FIFO, and interrupt driven I2C communication. The gesture engine accommodates a wide range of mobile device gesturing requirements: simple
North-South-East-West gestures or more complex gestures can be accurately sensed. Power consumption and noise are minimized with adjustable IR LED timing. The Proximity detection feature provides object detection (E.g. mobile device screen to user’s ear) by photodiode detection of reflected IR energy (sourced by the integrated LED). Detect/release events are interrupt driven, and occur whenever proximity result crosses upper and/or lower threshold settings. The proximity engine features offset adjustment registers to compensate for system offset caused by unwanted IR energy reflections appearing at the sensor. The IR LED intensity is factory trimmed to eliminate the need for end-equipment calibration due to component variations. Proximity results are further improved by automatic ambient light subtraction.
The Color and ALS detection feature provides red, green, blue and clear light intensity data. Each of the R, G, B, C channels have a UV and IR blocking filter and a dedicated data converter producing16-bit data simultaneously. This architecture allows applications to accurately measure ambient light and sense color which enables devices to calculate illuminance and color temperature, control display backlight, and chromaticity.
ams TMG3992：
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The Gesture detection feature provides motion detection by
utilizing directionally sensitive photodiodes to sense reflected
IR energy by sourced by the integrated LED. The following
registers and control bits govern gesture operation and the
operational flow is depicted below.