Auto Color via Vertical Interval Reference signal (was Re: [Tig]Image from Peter Swinson)

[Adrian Thomas]

On Jan 14, 2007, at 2:37, woz wrote:

>
> By the way Bang and Olufsen  (mainly based on Philips electronics)  
> among others, used that  ambient detection system not so long ago,  
> I actually thought it was quite sensible, after all as you know  
> from pluge-ing a monitor, you won't get the same setting if you  
> illuminate the room, so I guess with the correct slugging and  
> curves (caveat here...with a disabling function for those who  
> didn't want it) it could be a benefit.

Indeed, my Sharp LCD (LC26P70) television uses an ambient light  
sensor to determine how bright it sets its backlight. Works very  
nicely, too - responds to changes in about a second with decently  
fine grained control. It also has an automatic volume control, but  
that responds too quickly and tends to make things sound like they've  
been processed with Dolby C.

Philips also has their "Ambilight" system which provides their LCD  
sets with their own reference background - and it works well.

--
Adrian Thomas
AUTOMATIC TELEVISION
LONDON UK WC2N 4DU
www.autotv.co.uk
+44 (0) 20 7240 2073
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