Sharp Aquos 40LE820UN only runs at 60hz.

[MentalIlness]

I am running the Sharp Aquos 40LE820UN. And I cannot seem to get it to run at 120 refresh. It seems locked down at 60.

How do I change this to run at 120 ? If it is possible. But I do know it is capable of running it.

Some specs....

General

Screen Size 40"
Recommended Resolution 1080p
Maximum Resolution 1920 x 1080
Aspect Ratio 16:9
LED Technology Edgelit
Panel X-Gen LCD Panel
Viewing Angle 176°(H) / 176°(V)
Dynamic Contrast Ratio 5,000,000:1
Response Time 4ms
Refresh Rate 120Hz

Video

ATSC/NTSC/QAM Tuner
Enhanced Motion 120Hz Fine Motion Enhanced
Video Processor Quattron quad pixel technology
Support Video Signal 1080i/p, 720p, 480i/p

Audio

Output Power 10W + 10W +15W (Subwoofer)

Connectivity

HDMI 4 In
PC Input D-Sub
LAN Ethernet In
USB Yes
Composite A/V1 In
Component Video 1 In
Other ConnectorsAudio Inputs (L/R): RCA x 2 RS-232C: 1

 

[MentalIlness]

I should also add that I am running HDMI from the 6870 to the panel.

 

[lavaheadache]

Almost every single 120hz tv can only accept a 60hz signal. To call them 120 hz tv's is marketing bull crap.

120hz monitors on the other hand accept a 120hz signal.

Furthermore, anything but the very latest HDMI signal doesn't have the bandwidth for 120 hz @1080p.

 

[96Firebird]

As far as I know, TV screens will keep the 60Hz refresh rate when hooked up to a computer. They don't actually run at 120Hz, they interpolate between the two images that are at 60Hz and create a new image based on them. I could be very wrong about this, but I believe that is why you cannot get a 120Hz refresh rate when hooked up to a PC.

Edit - Beat by lava.

 

[MentalIlness]

As far as I know, TV screens will keep the 60Hz refresh rate when hooked up to a computer. They don't actually run at 120Hz, they interpolate between the two images that are at 60Hz and create a new image based on them. I could be very wrong about this, but I believe that is why you cannot get a 120Hz refresh rate when hooked up to a PC.

Edit - Beat by lava.

Ok that is fine then. Was just worried "something was wrong". But since it isn't, I am fine with it.

 

[MentalIlness]

Almost every single 120hz tv can only accept a 60hz signal.

120hz monitors on the other hand accept a 120hz signal.

So this is why then ? Gotcha. Thanks guys.

 

[Ferzerp]

So this is why then ? Gotcha. Thanks guys.

Because monitors have traditionally always been much higher quality than televisions?

 

[chimaxi83]

Enhanced Motion 120Hz Fine Motion Enhanced

This is the 120Hz marketing crap. 120Hz HDTV's only accept a maximum of 60Hz, regardless of what's on the box. The other 60 is interpolated like the other guys said, or basically your TV will insert it's own frame in between each source frame, to "smooth" the motion. Source gives you 60, TV creates it's own 60 based on the image, and that's how they get their 120.

 

[birthdaymonkey]

I made the same mistake when I bought an LCD TV. 120Hz TV is the worst kind of marketing BS. Their interpolated video looks awful anyway. They always have the TVs at big box stores set up to play Toy Story because computer animation is the only way to show off this tech without it seeming creepy/uncanny.

 

[cmdrdredd]

not trying to hijack, but is it this way too with Plasma?

 

[Ben90]

Yep, often people like to quote the response time of Plasma as a refresh rate which unfortunately isn't true. It would be like saying CRTs can do 140Khz.

 

[Dark Shroud]

I believe it's still frame multiplying with Plasmas. I have a Samsung 2012 model that's "600Hz." I haven't bothered trying to connect my PC to it but I doubt it would accept a 120Hz signal.

 

[ViRGE]

I believe it's still frame multiplying with Plasmas. I have a Samsung 2012 model that's "600Hz." I haven't bothered trying to connect my PC to it but I doubt it would accept a 120Hz signal.

Correct. Plasmas don't accept 120Hz either. Since there's no TV standard that requires 120Hz (3D is done via jumbo-sized "packed" HDMI frames), they simply don't build electronics capable of handling it.

Anyhow, Plasmas are indeed frame multiplying. They do this to refresh the phosphors sooner to prevent any kind of noticeable flicker due to the phosphor dimming.

 

[Gloomy]

They always have the TVs at big box stores set up to play Toy Story because computer animation is the only way to show off this tech without it seeming creepy/uncanny.

I think it looks amazing. :awe:

 

[birthdaymonkey]

I think it looks amazing. :awe:

Well there have to be some people who enjoy it, or it probably never would have made it past the prototype phase.

I think 120Hz frame interpolation makes video look like a soap opera at best, a shaky mess at worst. As long as film continues to be shot at 24Hz, motion blur will seem a normal part of the medium. When it gets taken away, the effect (on me anyway) is disturbing.