Can anyone explain to me what is the purpose of the proximity sensor, on my phone. What if my phone's proximity sensor stops working or gets damaged. What problems will I face?
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PS: I am just curious to know.
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Mohit JainMohit Jain
9 Answers
The proximity sensor on most smart-phones with touchscreen exists to disable accidental touch events. The most common scenario is the ear coming in contact with the screen and generating touch events, while on a call.
wbogaczwbogacz
mobile phones use IR-based proximity sensors to detect the presence of a human ear. This sensing is done for two purposes: Reduce display power consumption by turning off the LCD backlight and to disable the touch screen to avoid inadvertent touches by the cheek. IR sensors have a number of disadvantages, including high power consumption, high cost, blind zones, and accumulation of dirt, as well as unreliable performance over temperature, hair, and skin color variations.
nishantnishant
It prevents that your ear is doing input actions on the touchscreen when you are making a call. :)
Most proximity sensors are simply light sensors that will detect 'proximity' when they are covered.
FlowFlow
Developers can get access to the sensor and use it for other things. At a users suggestion I use it in my biking app IpBike to wake up the screen. The user just has to wave there hand over the sensor and the screen switches back on. Very handy when cycling with gloves on.
IforIfor
Another usage for the proximity sensor is to detect while it's in pocket and disable accidental touch or power button press.
In Moto Gx series (and I believe in Moto Z and Moto X also) if you pick the phone out from pocket or move the phone while it's laying on the table it'll show up the screen for fast unlock and a quick glance at notification. If you cover the proximity sensor while it's in static state for a while and uncover it you'll see the same effect
phuclvphuclv
When you get a call in a touch screen smart phone, when your phone get closer to ear or any body part the phone screen get off. That is done by the proximity sensor. Proximity sensor is responsible to heat and when a body part get close to sensor the screen gets off and it prevents accidental touches in the screen. In some smart phones proximity is used to keep the screen off when the mobile phone is in the pocket(pocket mode). If you loose functioning of proximity sensor, your phone will make accidental touches when your phone is in the pocket or when you gets a call.
Randhaja Malshan WanigasekaraRandhaja Malshan Wanigasekara
Proximity detector is non contact type displacement sensor i.e proximity sensor used to are sense and indicate target presence of object to without physical contact.
Kalpesh PatilKalpesh Patil
In simple proximity sensors are light sensors.It turns the screen off while you are making an call.
Mohitesh AgarwalMohitesh Agarwal
The following explanation appears in the instruction manual for most LG phones:
The proximity sensor automatically turns the backlight off and locks the touch screen by sensing when the phone is near your ear. This extends battery life and prevents you from unintentionally activating the touch screen during calls.
Kokoria IotebwaKokoria Iotebwa
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YUMO LM18-3005PCT inductive proximity switch sensor
Datasheet:
CM18 Capacitive proximity switch | ||||
Detecting rang mm 0-5mm | YUMO part no. | |||
Flush | DC 6-36V | NPN | NO | CM18-3005NA |
NC | CM18-3005NB | |||
NO+NC | CM18-3005NC | |||
PNP | NO | CM18-3005PA | ||
NC | CM18-3005PB | |||
NO+NC | CM18-3005PC | |||
AC 90-250V | SCR | NO | CM18-2005A | |
NC | CM18-2005B | |||
Detecting rang mm 0-8mm | ||||
Non-flush | DC 6-36V | NPN | NO | CM18-3008NA |
NC | CM18-3008NB | |||
NO+NC | CM18-3008NC | |||
PNP | NO | CM18-3008PA | ||
NC | CM18-3008PB | |||
NO+NC | CM18-3008PC | |||
AC 90-250V | SCR | NO | CM18-2008A | |
NC | CM18-2008B | |||
LMF40 Inductive proximity switch Characteristics | ||||
Output current | DC | 200mA | ||
SCR/relay | 300mA | |||
Output voltage drop | DC<3V;AC<7V | |||
Consumption current | DC<15mA, AC<10mA | |||
Standard detected object | Conductor and dielectric body | |||
Response Frequency | DC:50Hz ; AC: 10HZ | |||
Working environment temperature | -25ºC ~+70ºC | |||
Insulation resistance | 50MΩ | |||
Shell material | ABS Resin , Metal | |||
Protection grade | IEC Standard IP54 | |||
Alternative model | LJC18A3-** |
Product picture:
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