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Yamakasi Catleap Q270 (100hz guaranteed). - Page 86  

Poll Results: Would you be interested in buying a Yamakasi Catleap Q270 (100hz guarenteed)

 
  • 87% (726)
    Yes
  • 2% (18)
    No
  • 10% (88)
    Maybe
832 Total Votes  
post #851 of 1131
I was thinking about buying a Q270 to upgrade from my BenQ E2200HD and have a couple of questions
1. Just how big is the difference between 60hz and 100hz?
2. Since running games at 1440p 100hz would probably bring most graphics cards to their knees, how drastically would the image quality be reduced when running games at 1080p?
Thanks.
post #852 of 1131
It is hard for someone to tell you the difference. Basically, the faster the monitor the less amount of blurring you have when an object is moving real fast. Your best bet is to into a store that has the 120v60hz side by side like most best buys do.

this might help a little..

http://www.youtube.com/watch?v=SU3Qklaxyco

As far as you second question, If you are going to buy a 1440p monitor it would be a sin not to run games that support 1440p at that resolution. I would grab these monitors while you can than pick up something like a 480gtx which are a steal now and can be found on sale at $200. OR in a month the 670 should be out in the $300 range!
Edited by bishop161 - 4/12/12 at 5:48am
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post #853 of 1131
Quote:
Originally Posted by cirthix View Post

It depends. Is the constant-current driver operating at constant current over many cycles or is it operating at constant current *while on*? I suspect the latter, with pwm dimming turning on and off the whole supply at a much lower frequency. If I had a catleap, I'd take it apart and probe it tongue.gif.
Quote:
Originally Posted by siberx View Post

Do you actually have one of these monitors and have you examined its backlight and found it to be lacking? I own one and observe no flicker problems whatsoever, which is corroborated by my analysis of the backlight driver circuit. They're using a 330kHz current-controlled boost converter (two of them, in fact - half the LEDs run off each) to drive the backlighting; this results in no visible flicker whatsoever. There's some concern that their choice of circuit for controlling the brightness setting allows for some unevenness between each side of the monitor (one boost converter drives two-thirds of the LEDs on one half and one-third of the LEDs on the other), but other than this (which can be fixed with a mod) the backlighting seems fairly well implemented from a flicker prevention perspective.
Earlier posts of mine indicate some flicker around 150Hz or so; I suspect this is some oscillation in the output circuit, and the slight variance in brightness from this (not a full on/off cycle) is not visible at all even to my fairly flicker-sensitive eyes (hand wave test included).

Flicker test (max brightness, ~half brightness, min brightness):
120
Based on the technique outlined Here.
2C Catleap model.

Findings:
150Hz backlight frequency.
No flicker at full brightness.
~20% modulation at half brightness.
~60% modulation at min brightness.

Definitely has lower flicker modulation than other LED displays, but the comparatively low frequency also makes it more visible. I personally can see only minor flicker at 50% in peripheral vision, but I know from past experience it's enough to cause migraines. Currently trying to decide on best way to modify the display to eliminate all flicker.
post #854 of 1131
1 question.

I know that 120hz looks better in games because it makes them look smoother. But how is it for watching movies? I watch a lot of movies / series on the computer monitor, which are usually in 24p (24 frames per second).

Does going from 60hz to 120hz make a difference in how movies are shown?
post #855 of 1131
Quote:
Originally Posted by Stab View Post

1 question.
I know that 120hz looks better in games because it makes them look smoother. But how is it for watching movies? I watch a lot of movies / series on the computer monitor, which are usually in 24p (24 frames per second).
Does going from 60hz to 120hz make a difference in how movies are shown?

Also for movies 120hz thumb.gif
post #856 of 1131
Quote:
Originally Posted by Vanchik View Post

Also for movies 120hz thumb.gif

But will they be more 'smooth' also? Because movies have that '24p look' that makes them not smooth on purpose. Home video camera's usually have that 'smooth' 50p look that make thier movies too smooth.

Or what else is the benefit of 120hz for watching movies?
post #857 of 1131
Quote:
Originally Posted by Stab View Post

1 question.
I know that 120hz looks better in games because it makes them look smoother. But how is it for watching movies? I watch a lot of movies / series on the computer monitor, which are usually in 24p (24 frames per second).
Does going from 60hz to 120hz make a difference in how movies are shown?
Quote:
Originally Posted by jakmp View Post

I was thinking about buying a Q270 to upgrade from my BenQ E2200HD and have a couple of questions
1. Just how big is the difference between 60hz and 100hz?
2. Since running games at 1440p 100hz would probably bring most graphics cards to their knees, how drastically would the image quality be reduced when running games at 1080p?
Thanks.

Check out this the OP post on the Catleap owners club on input lag and video. It gathers the information/videos discussed in the club on both topics. Here is the direct link - http://www.overclock.net/t/1225919/yamakasi-catleap-monitor-club/1430#post_16797012
post #858 of 1131
If they guarantee 100Hz, count me in for one. thumb.gif
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post #859 of 1131
Quote:
Originally Posted by Mr Pixel View Post

Definitely has lower flicker modulation than other LED displays, but the comparatively low frequency also makes it more visible. I personally can see only minor flicker at 50% in peripheral vision, but I know from past experience it's enough to cause migraines. Currently trying to decide on best way to modify the display to eliminate all flicker.

I'll take another look at the circuit and see if I can find the cause for this. Considering how they're driving the backlight there's no reason it *needs* to use low-frequency PWM to control the brightness, so if there is something causing this (moderate) flicker it should be possible to come up with some kind of mod to correct it. I'll let you guys know what I find.
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post #860 of 1131
Have the specs on the monitor been finalized yet? Info from OP and his contact on here has been kinda vague. Are we still agreeing on the proposed features as shown on the 1st post?

1. Panel will be A or A- they dont know yet. A+ is to expensive! 99% glossy like the recent Catleaps
2. We can't get a reengineered PCB! so it will be Single input Dual-DVI
3. Color will be of our choise! only one for all 1200 though! (Black, White, purple, red or something else)
4. I think everyone agrees on black??
5. There will be no Branding! (maybe yamakasi logo "Understandable", but nothing else)
6. They are looking into a thinner benzel, but will not promise anything atm.! this might change the overall exterior!
7. Perfect Pixel version will still be available at +60$, this doesn't mean A+ panel! just that the monitor will get checked from the manufactuere! Will add to delivery-time!

I don't think Perfect Pixel is necessary since some have mentioned it's useless. All I'd like is a 100Hz guarantee and a thin bazel for multi-monitor setup, everything else is bonus.
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