Hello!

Pardon me if this is a hopelessly naive question, but I'm wondering if anyone can explain the following phenomenon.

I have my CRT set to its component input, and have the DVD player which is connected to that input turned off. The Brightness and Picture controls on the CRT are set so that the screen looks a dark neutral gray. If I crank the Brightness higher and higher, the gray of the screen turns greenish. If reset the Brightness to the original setting and crank the Picture higher and higher, the gray of the screen turns reddish.

What causes this to happen? Thanks for any insight anyone can lend.

blue blooms first as you push white level, so it usually red/yellow shits there. down low its just whatever.

Haven't tried this with my year-2000 1080i CRT RPTV, but wouldn't be concerned seeing it unless: B&W movies had tints at normal picture/brightness settings in dark or brighter scene areas; any video had similar tints with the color turned off; pluge test patterns (B&W rectangles arrayed in decreasing white-to-black shades) had tints. If they did, I'd assume it's time for grayscale adjustments using an instrument--without any DIY tinkering in the service menu not based on instrument readings. -- John

Thanks for the feedback.

I do sometimes get greenish colored darks when watching TV through a satellite receiver. I don't have instrumentation to calibrate grayscale, so I guess the trail stops here for now.

PS: I do have a digital camera with white balance control I can set by Kelvin temperature, which also has an RGB histogram display. I wonder if I can use this coupled with something like DVE to mess with grayscale adjustments?

PS: I do have a digital camera with white balance control I can set by Kelvin temperature, which also has an RGB histogram display. I wonder if I can use this coupled with something like DVE to mess with grayscale adjustments?

No, it cannot. The SPD of camera filters will not interact with the display's SPD the same way your eyes will, so you cannot use a camera as a colorimeter.