Originally Posted by frodo_ca
First time projector owner and went with a HD200X. I just had a question about dlp/projectors in general.
When I get close to the screen (about 12 inches) I can see the individual pixels (not the problem) but they appear to be rapidly changing color/flickering, even in areas where there is no change in color or movement (e.g a title) in the picture.
Is this normal for any dlp projector or is this a connection issue (i.e. a bad hdmi cable). The projector is connected to the output of my Pioneer receiver and the source is a ps3, if that helps.
Yes, this effects is normal for DLP. The mirrors vibrate (deflect light) at a frequency to change brightness of each pixel. The black level, the darkest the pixel can get is based on 2 things. The deflection angle, which with Darkchip2 is not 100% deflection. And second, the frequency. Since the mirrors can not stay in the deflected position for very long. The best they can do is have it deflected more often than not.
Anyway, there is a 2nd part to this flickering that you have some control over. The video processor. The issue is more noticeable in solid areas and in dark areas. The better the processor, the better the noise is controlled. But you can reduce the issue by changing some settings.
On the HD70 you could not use Brilliant Color and reduce contrast and sharpness.
On the HD20, I find that if I keep the sharpness between 0-7 it helps a lot. Also I keep contrast at default, which I will have to get that number, but I think it's 0. I will check some other settings on the HD20 specifically.
Basically the more neutral you can keep the picture, the better. The effect generally gets worse when you try to make the image "pop" a lot. With settings such as high contrast, high sharpness, high vivid colors.
You likely noticed that if you pause a dark scene, or use a computer to projector a dark picture or a black image (not the projector built in images), that the flickering pixels are there. Once you have that on the screen, then adjust the picture at your closest normal viewing distance until the effect is reduced to your taste. It doesn't have to disappear at 12" away, just at your viewing distance.
But yes, normal DLP effect. At least for the single DarkChip2 DLPs I have seen under $2k. More expensive video processors combined with newer DMD chips do improve on this.