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Hello,

I am seeing a few new LED TV models from Sony. For example:

- KDL-60W850B

- KDL-70W850B

 

Both have "Premium HDTV" in their names. Now I compared those two models to the one I bought (KDL-65W850A) and from what I can see the KDL-65W850A has more and better features.

However there are a few differences that I would like to ask about.

 

The KDL-60W850B and KDL-70W850B have something called "Frame Dimming" while the KDL-65W850A has "Local Dimming". Which one is better? How does it apply to the viewer's experience?

 

I am still trying to find out why these models were released? Any ideas? What's so new and premium about them.

 
 

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Neither of those TV are true local dimming sets.


I'm guessing frame dimming might mean a edge lit & that fake "local dimming" is a direct lit.

Both of that is basically regular LCD/LEDs with the backlights arranged differently.


The dimming is probably just that, the TV auto dims the entire screen when there is no signal or if scenes gets too dark.
 

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Quote:
Originally Posted by wtfer  /t/1522176/frame-dimming-vs-local-dimming/0_100#post_24471717


Neither of those TV are true local dimming sets.


I'm guessing frame dimming might mean a edge lit & that fake "local dimming" is a direct lit.

Both of that is basically regular LCD/LEDs with the backlights arranged differently.


The dimming is probably just that, the TV auto dims the entire screen when there is no signal or if scenes gets too dark.

Frame dimming means the entire picture changes brightness on a frame by frame basis. Local dimming means different portions of the screen can change brightness. For example, on rolling credits the tv with frame dimming will dim to get better blacks, while also dimming the whites, since it is dimming the entire frame. The tv with local dimming will dim the black parts, while maintaining white level. Of course, both of those models are edge-lit and the implication of local dimming is limited. It does still provide an advantage over frame dimming though. Sony has been able to get very good results out of edge-lit local dimming. Still not near as good as full array local dimming.
 
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