Flashing colours

Cstggld · 01-30-2013, 02:01 PM

Has anyone experienced the following:
While watching television or playing ps3 games, occasionally the screen image will flicker various colours (red,blue,green,etc). The image is still viewable, but the colours all rapidly flicker and change. I have an optima hd projector connected to a pioneer receiver. I've used hdmi from projector to receiver as well as DVD-d from projector to receiver. All other components are connected to the receiver via hdmi. I would love to hear any suggestions out there.

Frustrated! Thanks.

73shark · 01-31-2013, 09:36 AM

Welcome to the forum.

First I'd try bypassing the receiver and going direct to PJ. Also try using a known good HDMI cable.

jkkyler · 01-31-2013, 12:06 PM

Please give model numbers as saying I have an optoma projector and pioneer receiver isn't really helpful.

borromini · 02-01-2013, 10:19 PM

Sounds like your susceptible to the dreaded rainbow effect. Your Optoma is a DLP projector using a colorwheel. On some models and with certain folks...the rainbow effect will appear. If this is the case...there's not much you can do.

Here's Wiki's explanation:

The color wheel "rainbow effect"
DLP projectors utilizing a mechanical spinning color wheel may exhibit an anomaly known as the "rainbow effect." This is best described as brief flashes of perceived red, blue, and green "shadows" observed most often when the projected content features high contrast areas of moving bright or white objects on a mostly dark or black background. The scrolling end credits of many movies are a common example, and also in animations where moving objects are surrounded by a thick black outline. Brief visible separation of the colours can also be apparent when the viewer moves their eyes quickly across the projected image. Some people perceive these rainbow artifacts frequently, while others may never see them at all.
This effect is caused by the way the eye follows a moving object on the projection. When an object on the screen moves, the eye will follow the object with a constant motion, but the projector will display each alternating color of the frame at the same location, for the duration of the whole frame. So, while the eye is moving, it will see a frame of a specific color (red for example). Then, when the next color is displayed (green for example), although it gets displayed at the same location overlapping the previous color, the eye will have moved toward the object's next frame target. Thus, the eye will see that specific frame color slightly shifted. Then, the third color gets displayed (blue for example), and the eye will see that frame's color slightly shifted again. This effect is not perceived only for the moving object, but the whole picture.

Cstggld · 02-21-2013, 11:29 AM

Thank you for everyone's messages and thoughts. I've been away and am going to try hooking hdmi directly from blu-ray to projector and see if that changes anything.

01-30-2013, 02:01 PM	#1
Cstggld What is HD? Join Date: Jan 2013 Posts: 2	Flashing colours Has anyone experienced the following: While watching television or playing ps3 games, occasionally the screen image will flicker various colours (red,blue,green,etc). The image is still viewable, but the colours all rapidly flicker and change. I have an optima hd projector connected to a pioneer receiver. I've used hdmi from projector to receiver as well as DVD-d from projector to receiver. All other components are connected to the receiver via hdmi. I would love to hear any suggestions out there. Frustrated! Thanks.

01-31-2013, 09:36 AM	#2
73shark HD is addictive Join Date: Sep 2009 Location: KC, MO area Posts: 22	Welcome to the forum. First I'd try bypassing the receiver and going direct to PJ. Also try using a known good HDMI cable. __________________ Viewsonic Pro8100

01-31-2013, 12:06 PM	#3
jkkyler I bleed for HD Join Date: Nov 2007 Location: Ohio Posts: 7,650	Please give model numbers as saying I have an optoma projector and pioneer receiver isn't really helpful. __________________ HT- Panasonic TH-50PZ800U 1080p plasma, Panasonic PT-AX200u LCD projector, Elite Vmax Electric 100' screen, Onkyo TX-NR905 AVR, Paradigm Titan Monitor v5 fronts, Paradigm CC-190 v6 center, Paradigm Atom Monitors v5 surrounds(x4), HSU research VTF-2 sub, xbox360+hd-dvd player ,Sony BDP-S550 blu-ray, D*tv H21 HD-DVR Bedroom: Insignia NS-lcd26, Samsung BDP-1400 blu-ray Den - Vizio 20" 1080p LCD + Samsung BD-p1600 Don't believe everything you read on the internet - Albert Einstein

02-01-2013, 10:19 PM	#4
borromini HT Frontiersman Join Date: Jun 2004 Location: Northern California Posts: 10,291	Sounds like your susceptible to the dreaded rainbow effect. Your Optoma is a DLP projector using a colorwheel. On some models and with certain folks...the rainbow effect will appear. If this is the case...there's not much you can do. Here's Wiki's explanation: *The color wheel "rainbow effect"* DLP projectors utilizing a mechanical spinning color wheel may exhibit an anomaly known as the "rainbow effect." This is best described as brief flashes of perceived red, blue, and green "shadows" observed most often when the projected content features high contrast areas of moving bright or white objects on a mostly dark or black background. The scrolling end credits of many movies are a common example, and also in animations where moving objects are surrounded by a thick black outline. Brief visible separation of the colours can also be apparent when the viewer moves their eyes quickly across the projected image. Some people perceive these rainbow artifacts frequently, while others may never see them at all. This effect is caused by the way the eye follows a moving object on the projection. When an object on the screen moves, the eye will follow the object with a constant motion, but the projector will display each alternating color of the frame at the same location, for the duration of the whole frame. So, while the eye is moving, it will see a frame of a specific color (red for example). Then, when the next color is displayed (green for example), although it gets displayed at the same location overlapping the previous color, the eye will have moved toward the object's next frame target. Thus, the eye will see that specific frame color slightly shifted. Then, the third color gets displayed (blue for example), and the eye will see that frame's color slightly shifted again. This effect is not perceived only for the moving object, but the whole picture. __________________ "I'd rather have a bottle in front of me than a frontal lobotomy"

02-21-2013, 11:29 AM	#5
Cstggld What is HD? Join Date: Jan 2013 Posts: 2	Thank you for everyone's messages and thoughts. I've been away and am going to try hooking hdmi directly from blu-ray to projector and see if that changes anything.