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Old 12-26-2012, 10:02 PM   #18
xuyn2003
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Posts: 71
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Join Date: Jul 2011
Device: PRS-T1&KOBOTOUCH
Quote:
Originally Posted by DNSB View Post
Sheeshh,....

Their most likely method of controlling the LED brightness is using PWM. There will be no change in the flashing rate when using PWM as the brightness change will be done by modifying the amount of time the LED is on during each cycle.

If they are using PWM at 1KHz (a 1000 microsecond cycle width), I somehow doubt that anyone is going to notice any strobing effect or suffer any ill effects. Now if they were using between 5 and 30 pulses per second, you might have a case (and for the photosensitive epileptic, a seizure).
Hi David, according to Kevin's description in this thread,http://www.mobileread.com/forums/sho...d.php?t=200706
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Quote:
And while there is one light level lower, level 1, that the Glo never uses, setting the frontlight to that level causes flickering that is very noticeable in a dark room
That is to say, though the flashing frequency is not changed, but the feel to eyes will be flickering because of shorter LED-on time in one cycle?

Last edited by xuyn2003; 12-26-2012 at 10:08 PM.
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