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Changhong > 
Item#: N82E16889624001
Changhong 40" 1080p LED HDTV - LED40YC1700UA
  • Full HD 1080p Resolution
  • Enhanced Motion Rate 120Hz
  • Direct LED Technology
  • SRS TruSurround HD
  • 3 HDMI Inputs
  • MHL Compatible
  • USB INPUT
  • $399.99
  • $299.99
  • Save: $100.00 (25%)
  • Free Shipping (restrictions apply)

5 out of 5 eggs To clear up 120 hz as Computer 06/27/2014

This review is from: Changhong 40" 1080p LED HDTV - LED40YC1700UA

Pros:

I DO NOT OWN THIS T.V. I am writing this to clear up facts that people give bad ratings for lack of understanding of technology.

There is no such thing as a 120hz Broadcast, so this and any other 120hz T.V. are 60hz but use a separate processing unit to double the refresh rate for motion scenes. Even Blue-Ray is 60hz, there is no way to change this.

When buying a 120hz T.V. to use as a Computer Monitor, you are actually causing stutter in gaming because of the time the T.V.'s Processor takes to Double the 60hz to 120hz. "IMPORTANT": TO AVOID THIS, BE SURE THE T.V. HAS A GAMING MODE OR A P.C. IN THAT WILL BYPASS THE T.V.'S OWN PROCESSOR. This will in-effect make the T.V. output the signal in its original 60hz.

The Only ways to Date to get 120hz refresh on a T.V. as a Monitor is by using the latest HDMI 1.4b Input and the proper High through put HDMI cable on a 4K resolution T.V. subsequently you can also use the newer mini display ports and display ports. But the only Native 120hz T.V. is a 4K T.V. set.

Cons:

None as I do not own this T.V.

Other Thoughts:

I hope this helps clear up the 60hz-120hz issue for people that read this. Just think, it gets even MORE complicated with 3D T.V.'s

Passive 3D T.V.'s use a screen both on the T.V. and in the glasses you use to split the 60hz (Remember there is no true 120hz) and give depth for 3D effect. So this in effect reduces the Horizontal Frame, so a 1920x1080 (1080p) actually becomes a 1920x540 in your brain. This can be overcome with the promise of 4K T.V.'s as they are Native 120HZ but will still require a 120hz signal to get to the T.V. meaning HDMI 1.4b on both the Video card and T.V. or Display port. So far, I haven't seen a feasible realistic implementation without being Daddy or Mommy Rich Bucks yet. The Greatest benefit with Passive 3D is the glasses are the same as the Movie theater and cheap. So people with Kids, or love to have people over or even don't want to deal with the psychological effects that may occure with Active 3D this is the way to go.

Active 3D uses an IR emitter (Infra-red) and rather expensive glasses $70-$150 (Controlled by the IR emitter) that are larger than passive and have to be recharged (So no Movie theater glasses are gonna work with it). The trick with Active is the glasses act like shutters. That's right, very constant shutting of the lenses from Left to Right to achieve the 3D effect. This is Null and Void of the 60hz problem as the Technology is with the glasses and not splitting the actual signal. However, 1 of 10 people report Headaches after use and basic Psychology explains the dangers of Seizures with Rapid strobe lighting effects. But this is a more in-depth 3D experience, if you want to pay for all the hardware, glasses, and possible Eye Issues like Steve Martin in the Movie The Jerk :).

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  • Steve B.
  • Owned For: less than 1 day


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