Sony Bravia Video Engines

Ballroomblitz · Post by **Ballroomblitz** » Thu Dec 21, 2006 11:18 am

Hello guys, came across your site a few weeks ago and very impressed reading all the material on-line.

My question regards two models of Sony LCD T.V's, namely the 46" BRAVIA (KDL46V2500) & the 46" BRAVIA

pmalter0 · Post by **pmalter0** » Fri Dec 22, 2006 7:06 am

Regardless which you chose, 46" is kinda small. To watch 1080p you shouldn't be more than 2 1/2 times the screen size away. That means no more than 9' 8"--that's a pretty small room.

Richard · Post by **Richard** » Fri Dec 22, 2006 8:08 am

You can resolve 1080P up to about 3.2 screen heights. 4 is really pushing and at 5 it does not matter if it is 720P or 1080I.

checking the Sony website it sure appears you are paying for looks, not for better performance.

pmalter0 · Post by **pmalter0** » Fri Dec 22, 2006 4:30 pm

Isn't 3.2 screen heights about the same as 2 1/2 times screen size(diagonal)?

Richard · Post by **Richard** » Fri Dec 22, 2006 9:05 pm

100" 16:9 screen is 49" tall and 87.2" wide. Per my calculator 3.2X49=156.8 and 2.5X87.2=218... I think you are confusing 2.5... the viewing distance is considered between 3.2 and 2.5 screen heights depending on whose camp you are referring to.

From experience it is difficult to get 720P to survive 2.5 but it handles 3.2 easy where 1080P can definitely go to 2.5.

randybot · Post by **randybot** » Sun Dec 24, 2006 11:49 am

Richard,

It is usually very difficult to determine actual screen height from manufacturer's published specs. On the other hand, diagonal size is everywhere. What multiple of the 16:9 diagonal screen size do you recommend to determine optimal viewing distance for 720P and 1080P screens?

Richard · Post by **Richard** » Sun Dec 24, 2006 3:34 pm

If I am with the set I just figure it out right there... 3 screen heights.

Here at the forum I use...

Screen Size Calculator
viewtopic.php?t=3498

BTW, both of those models provide full spectrum back lighting for correct color!

pmalter0 · Post by **pmalter0** » Mon Dec 25, 2006 8:53 am

The diagonal, or published, size, is approximately twice the height.

randybot · Post by **randybot** » Tue Dec 26, 2006 7:50 am

I sell TV's by phone to commercial customers, and am looking for a simple multiplier that I can use to recommend the proper size for my customers' application. Has anybody come up with a number based on the diagonal screen size?

Thanks!

pmalter0 · Post by **pmalter0** » Wed Dec 27, 2006 7:55 am

Your customers aren't going to like the truth--that's why almost no retailers tell it to them. To fully resolve HD, distance should be no more than 1.6 times the diagonal screen size. However, IMHO up to 2.5 gives an acceptable HD experience. This means that 90% of those who have bought flat screen "HDs" aren't really seeing HD.