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Backlight of Samsung LE37A567P2W LCD TV causes IR problems

PostPosted: Mon May 16, 2011 6:47 pm
by mikkokh

This is weird, but it seems that backlight(?) of my LCD TV causes problems with IR detection of USB-UIRT... Is it normal?
Backlight level of LCD is set to 4 (of 10) and it's energy save feature is set to high.

What can I do about this problem? - I have tested many places and finding of good working positions for USB-UIRT unit feels like job, because of this problem.

PostPosted: Tue May 17, 2011 2:37 am
by jrhees
Unfortunately this can happen. Have you tried positioning the usbuirt farther away from the LCD screen to verify that it is a light issue and not an electromagnetic interference issue?


PostPosted: Tue May 17, 2011 7:27 am
by mikkokh
Thanks about reply!

Yes. It's tested in many places, also about 2 metres distance from LCD TV where I would normaly keep it. When TV is powered on and backlight goes on remote does not usualy work anyway, or in best cases it works only somehow when I target IR directly to USB-UIRT device. When TV is off, remote works quite like dream. Batteries of my old WinTV remote (used with USB-UIRT) are just changed and new.

I think that white walls of this room echoes IR light of TV screen and it is too much for USB-UIRT receiver. Is there any possibly to lower sensitivity of USB-UIRT receiver? If no with software then maby with some external solution, like with external "lens" cover material?

PostPosted: Mon May 23, 2011 10:10 pm
by jrhees
Unfortunately, there is no way to lower the sensitivity other than covering the receiver itself. Do you have the standard version or the 56KHz-enhanced version?


PostPosted: Tue May 24, 2011 5:13 pm
by mikkokh
I have 56KHz -enhanced version.