Sony Bravia HX950

[just4kix]

Blooming is inherent to all picture technology - CRT, plasma, LCD, projector, cinema at the halls, and perhaps OLED too. It may be known in different terms. For example, when my plasma starts up, it displays the the "Smart Viera" logo and one can clearly see the aura of light around it. If it is displaying large light coloured text (white, light yellow, sky blue) on deep dark background (black, navy, deep blue), a halo can be seen. It is impossible to eliminate this kind of "light leak". Perfect black means total absence of any photon particle. It is impossible to create perfect dark - only in black holes maybe.

Perhaps the effect is less pronounced on plasma than LCD but nevertheless it is there.

Coming back to HX950, it is reported that it has 196 LED backlight zones. Had there been tiny 1920x1080 LED backlight zones, i.e., one tiny LED per LCD pixel, all controlled by local dimming, then you may get near perfect blacks, no blooming, etc. But this is not only impractical, it may run cost of TV to near $100K, maybe even more. And it is not required. When watching TV, no one notices the blooms unless they are very-very pronounced.

Point is one must appreciate what should be appreciated and criticize what needs to be criticized. When the checks and balances are in place, then one can take an informed decision. Question is not whether HX950 produces bloom or halo or not. It will do that. Question is how much and what is acceptable and what is not.

It is also correct that by overexposing the picture by keeping shutter open for too long, one can see more pronounced blooms.

 

[adder]

Well its possible to put 1920x1080 pixels dimming zones,but the cost will be very high,might as well buy a OLED,or even the Sony crystal LED which basically had thrice that pixel made up of LED(thrice due to R,G,B sub pixels).

Back to HX950 the person who took that shots has clarified that blooming is a non issue in real world,he used the words "i very very very rarely see blooming".

 

[longshanks]

Blooming is inherent to all picture technology - CRT, plasma, LCD, projector, cinema at the halls, and perhaps OLED too. It may be known in different terms. For example, when my plasma starts up, it displays the the "Smart Viera" logo and one can clearly see the aura of light around it.

I am not sure why you concluded Plasma,CRT and OLED has blooming and where you got this idea from, AFAIK these technologies cannot have blooming due to the absence of back lighting. I am not sure about projectors though.

The viera logo effect is caused by the light from each actual pixels but the blooming halo effect is created in that Sony TV due to the back lighting, its like a additional light halo in the background created by the local zones of LED back light and not the light from the pixels, this is more prominent in off axis where you can see more distracting halo's in the background around the image because local dimming tries to illuminate the LED's around that particular zone.

It is just like the halo you see on many god pictures where the light is not from god's face but it is rather another layer of light behind god's head.

Plasma or CRT or OLED don't have to worry about this issue because where ever light is required each individual pixels and turn on and stud down with no help from any back lighting.