With the development of smart wearable devices, various new electronic products are constantly being developed, such as smart helmets, smart watches, smart bracelets, etc. Smart glasses are one of them. Domestic Huawei and Xiaomi have successively launched smart products .
Smart glasses have similar functions to smart headphones. They not only retain the functions of the glasses themselves; they can also listen to music and make and receive calls through the built-in speakers and microphones.
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To make the product smarter and more convenient to use, it needs to be equipped with application-related chips to realize its functions. Currently, smart glasses will be equipped with a wearing detection circuit, which will only start working after detecting the user's use, in order to reduce energy consumption and extend working time. .
Smart glasses are equipped with intelligent detection chips, which can provide many functions. For example, when not being worn, they can automatically control the function of smart glasses to turn off, reducing user operations, and can accurately detect the wearing status of smart wearable devices, thereby providing accurate detection data. , to improve user experience.
Taiwan Wanghong WH4535V , represented by Gongcai.com, is a short-range human presence infrared sensor (within a detection distance of 15cm) that is very suitable for TWS headphones, glasses, watches and other products.
Product Description:
The WH4535V is a light-to-digital converter that combines an advanced proximity sensor with highly efficient VCSEL light; is a miniature optical ground grid array module that integrates a proximity sensor and a 940nm infrared VCSEL; utilizing an integrated VCSEL emitter Provided photodiode detection of reflected infrared energy, proximity detection function can detect nearby objects.
Offers flexible design space in a very compact ultra-thin package (2.0x1.0x0.5 mm)
It has the advantage of low power consumption (power supply: typical voltage 1.8V, power consumption: maximum power consumption 100uA at 10Hz output). Its interrupt function can also be used with an external microcontroller to help maintain low-power operation; it can be used for a long time in battery-driven systems. Stable operation.
characteristic:
■Small pitch design for 1.7mm circular sensor aperture size
■1.8v and 1.8v power I2C bus
■Total active current (including VCSEL current) at 10uA@100ms and 10bits.
■Standby current 0.7uA; sleep mode current 0.7uA
■940nm VCSEL infrared emitter drives 12mA.
■High crosstalk and ambient light cancellation, equivalent to 220 resolution.
■ADC resolution optional 10/12/14/16 bits
Pin sorting:
Pin description:
Application circuit:
In the field of ranging, Taiwan Wanghong is one of the leaders; it has launched a variety of ranging sensors with different distances and functions.