Home > HSDL-9100-021 proximity sensor
The proximity sensor allows phones to automatically switch to speakerphone mode and is made by Agilent Technologies, Inc..The HSDL-9100-021 is a miniature, low-cost optical proximity sensor to enable various applications in compact mobile devices in Hong Kong. The proximity sensor is packaged in a metal housing to shield the LED emitter from the photodetector.
It has a small footprint (7.1 x 2.75mm and only 2.7mm high) targetted for space-constrained applications, and it offers a variable detection range from approximately zero to 60 mm that allows manufacturers to easily customize the device for multiple applications.
The proximity sensor enables an automatic change from loudspeaker to earpiece mode when the phone is placed near the ear. It can also detect the opening and closing of clamshell mobile phones and can activate the power-saving mode in notebook computers. It also works for paper-edge detection in printers, photocopiers and fax machines. It can also be used for on and off switch of home appliances, such as table lamps, without the need for mechanical switches.
The surface-mount, lead-free package eliminates optical crosstalk between the LED emitter and the light sensor to assure high signal-to-noise ratio for reliable performance. The unit also features an integral ambient light filter and guaranteed performance over
the -25 C to +85 C temperature range.
External links
The above article is a rewrite from the link below.
