PWM in cell-phone torch

Status
Not open for further replies.
No, perception of brighter vs darker over actual increased optical clarity in a situation which requires perception of more than simple lighter or darker.
The placebo affect is real, doesn't mean sugar pills make you not sick =) Just makes you feel like you're not sick. Actual quantification of perception vs reality is painstakingly difficult.
 

I think it is for this reason
 
Their absolute brightness yes, but not their apparent brightness. Human perception is a bit tricky. A pulsed LED delivering a peak light output 1.5 times the average light output of a steady state LED will be visible to the human eye from a greater distance, even if the average brightness of the pulsed LED is equivalent. I don't think this effect is useful in close quarters though it's just at the lower limits of perception where it's noticeable.
 
Last edited:
Status
Not open for further replies.

Similar threads

A
  • Question
Led Torch schematic - thoughts?
Replies
10
Views
1K
augustinetez
A
  • Question
Batteries overheating in Cordless House Phone
2
Replies
21
Views
3K
vidalv
V
  • Question
Transformerless Power Supply from a Rechargeble Torch
Replies
2
Views
129
Pavi98
M
  • Question
Can a cell phone store AV data from multiple cameras?
Replies
0
Views
5K
Mark563
M
  • Question
Phone Charger Strange Noise
Replies
6
Views
1K
Dr_Doggy
Menu
Log in
Register
Cookies are required to use this site. You must accept them to continue using the site. Learn more…