tmg3993
gesture detector module with
light-to-digital converter, als,
proximity sense and irbeam
the device features advanced gesture detection, proximity
detection, digital ambient light sense (als), color sense
confidential
(rgbc), and optical pattern generation/transmission for
broadcast. the modular 2.36mm x 3.95mm x 1.36mm p ckage
is drop-in compatible with existing footprin s  nd ncorporates
an ir led and factory calibrated led driver.
gesture detection utilizes four directio al photodiodes to
sense reflected ir energy (sourc d by the i
tegrated led) to
convert physical motion information (i. . v
locity, direction and
distance) to a digital informat on. the architecture of the
gesture engine features automat c activation (based on
proximity engine results), amb ent light subtraction, cross-talk
cancelation, dual 8-bit data converters, power saving
inter-conversi
delay, 32-dataset fifo, and interrupt driven
the gesture engine accommodates a wide range of mobile device gesturing requirements: simple north-south-east-west gestures or more complex gestures canbeaccuratelysensed. 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 photodiodedetectionofreflected 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. theproximityenginefeatures 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 toeliminate theneedfor 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 andirblockingfilter and a dedicated data converter producing16-bit data simultaneously. this architecture allows applications to accurately measure ambient light and sense color which enables devicestocalculateilluminance and color temperature, control display backlight, and chromaticity.
the optical pattern generation/transmission feature is primarily intended for 1-d barcode transmission over ir to point-of-sale (pos)terminals.theirbeam engine features a 1024-bit ram for pattern storage and specialized control logic that is tailored to repetitively broadcast a barcode pattern using the integrated led. theirbeamenginefeatures adjustable
applications
the tmg3993 applications include:
•  gesture detection
•  color sense
•  ambient light sensing
•  cell phone touch screen disable
•  mechanical switch replacement
•  printed bar code emulation
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深圳市政鸿微电子有限公司
何建花
18194085326
布龙路339号鸿生源科技园