Originally Posted by HDBill58
Can anyone point out a 'how to' or guide for doing pixel alignment? Thanks in advance.
Tom Stites and Greg Rogers both provided some good information on this quite awhile ago. Rather than dig through the threads and try to find it I'll just try and paraphrase what they said:
Using a crosshatch or similar test pattern, adjust either the vertical or horizontal alignment first while keeping the other fixed (let's assume vertical first).
1) Deliberately misconverge R,G and B so that you can see each colors vertical line without interference from the others.
2) Adjust the focus to determine which color has the worst focus (the line is thicker than the others). With the RS-1 the blue is usually very thin and the red and green are usually the problem colors to focus.
3) Adjust the focus on the worst color to achieve the best focus (ie minimize the thickness of the line with color that usually has the thickest line).
4) Once the focus has been optimized, use the pixel shift to re-align the 3 colors.
5) Determine if one color is off by more than 1/2 pixel after alignment. If it is shift it by 1 pixel using the pixel adjust so that better than 1/2 pixel is achieved.
6) Repeat for horizontal convergence although the focus step can probably be skipped.
A couple of notes:
- It's usually easier to use an external test pattern (DVE for example) rather than the internal ones inside of the RS-1
- A good way to double check the final convergence is by looking at the 3 color convergence test pattern in the service mode of the RS-1.
- Convergence will usually be better towards the center and worse towards the sides of the image. A person may need to decide if they can live with worse focus and/or alignment in the center in exchange for better focus and convergence on the sides.