in Electrical Engineering by

2 Answers

0 like 0 dislike
The screen of mobile is made up of light emmiting diode and photo diode.which sens the darkness but now a days it only sens human touch it depends on human electric field.led are work on different freqency they are in make one picsle from red,green,blue led and gives every type of color bye there particular combination at received frequency.
by
0 like 0 dislike

There  are  two  major  type  of  screen  type ;LED,LCD. They  are  embedded  widh  sensors  which  opperate  at   diffrent  principles  according  to  the  manufacture's  choice  .Some  opperate  in  such  away  that  when  you  tourch  the  screen  with  your  finger  there  is  a voltage  drop  at  that  point  hence  a  signal  is  sent  to  the  processing  unit  . Some  also  opperate  when  the  light  emmited  by your  screen  is  blocked  by  your  finger.

by

Related questions

0 answers
asked Jul 13 in Machine Design by anonymous | 28 views
1 answer
asked Dec 30, 2017 in Switchgear And Protection by Quiz | 68 views
1 answer
1 answer
0 answers
1 answer
2 answers
1 answer
0 answers
1 answer
2 answers
asked Jun 4, 2018 in Electric Power Generation by anonymous1 | 54 views
1 answer
1 answer
asked Mar 26, 2018 in DC motor by anonymous1 | 34 views

9,137 questions

7,896 answers

145 comments

3,237 users