Question about InFocus Proxima UltraLight LX1 Multimedia Projector

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Wobbly screen image

Thanks to ebackhus for the "screen door" feedback, but I'm not sure that's the issue. My grid has a wobbly or rippled quality to it. The guy I bought it from said it was a phase problem.

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Are you connected to a PC (DIGITAL SIGNAL)or a video source?
If you are getting a jumpy screen from a digital source like a LATTOP/PC you many be feeding a signal that's not equal to the resolution of the projector itself.l There is circuitry in the projector to attempt to convert the resolution of the picture received into the screen resolution. It's an imperfect process, especially if you have a higher screen resolution going in than the 1024 x 768 native resolution of thie LX-1.
What you need to do is set the video output of the computer to that resolution.
The original LX-1 Infocus units had a less capable resolution resolving circuit than their later units.
In a portable, it's possible to setup two resolutions - one for the Laptops own screen resolution and another for the auxilliary (external) resolution of a secondary display or a projector attached there. Modern Laptops usually have a resolution of 1400 x 800 pixels or higher (mine are 1920x 1200), The LX1 can not handle that resolution well at all. If you set the external output to something slightly higher like 1200x800 it will handle it better, but you still will have problems, especially on the older units from Norway.

(I seem to remember some control over phasing in the LX-1 setup, too. but this might be more applicable to a video input rather than a digital one.)

Posted on Apr 18, 2010

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Posted on Jan 02, 2017

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How i adjust horizontal size and vertical size


To answer your concern, all you have to do is to change the setting of your aspect ratio on your TV.

Here is my suggested way to procede:


1. Apply 1080i signal, which should produce an oversized HD image on ColorStream1or 2.
2. Select an HD channel that is broadcasting standard 4:3 image, not wide screen.
3. Switch to the Service Mode ( Please refer to the above links). In the Service mode, press channel up/down to find the Adjustment parameters needed for the following steps.

4. Adjust HIT with volume up/down control for the image height to 22.5 inches.

6. Adjust WID for image width of 30 inches, (22.5*4/3)
7. Adjust HPOS to center the image.
8. Adjust PARA and TRAP to minimize geometric distortion.
9. Switch into Convergence mode and Adjust VLIN to get equally spaced horizontal grid lines.
10. Measure the length of the central grid lines and note the number of horizontal and vertical grid lines. This information is used to create an overlay grid.
11. Create the overlay grid on 40x25 x0.003 inch clear Acetate sheet, which you can get at the Art Supply store for under $2. Draw the grid with a fine line erasable pen. Draw vertical and horizontal lines through the center of the sheet so that the lengths are the same as the central grid lines. Now draw the grid so that it has the same number of lines as the convergence grid but are equally spaced, with the outer ones at the ends of the central lines.
12. Cut off about 1/4 inch from the right side of the sheet so that the sheet can lay flat against the screen, which is slightly less than 40 inches.
13. Put a reference mark on the TV frame 2.5 inches down from the upper left side of the screen.
14. Place the overlay on the screen so that the upper edge lines up with the reference mark. The overlay sticks by electrostatic attraction.
15. Use convergence controls to remove grid distortion and converge grid colors. Refer to the Anamorphic link for details.
16. Enjoy 1080i.

Other Comments:
I didn't realize I could create the overlay grid before placing the Acetate sheet on the TV screen, until I finished drawing the grid with the sheet placed on the screen. I added grid lines as called for in the procedure. I'm sure this method took much longer no only to draw the lines but some of them were difficult to see.

Part way through the convergence procedure, I became concerned that the image width was off since I did my screen adjustment with wide screen image. Thus, I decided to repeat that step with a 4:3 screen.

I confirmed the need to press 7 often to save results since after I adjusted one grid color without it, I accidentally hit a key that switched me out of convergence mode and when I switched back, all settings were gone.

Another mistake I made was not realizing that the cursor color determines which grid gets moved.


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1. Click the Start button at the lower left corner of your screen.
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Your Feedback is greatly appreciated.

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Hello,

 

Picture quality problems (such as lines, fuzzy image, or wrong colors)

  1. Check the cables and connections: Make sure that cable connections are securely fastened to the connectors and try reaseating the connectors. If connecting a device using component cables, make sure all three color-coded cables are connected correctly into the corresponding connectors. Check the condition and length of the cables. Cables that are longer than 3 meters (10 feet), become more susceptible to promoting signal degredation (small dots "sparkling" on the screen and image ghosting). Cables that have been bent or pinched may also cause picture quality problems. Replace the cable or try a different cable type.
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I hope that this should resolve the issue. However, if the issue still persists then please contact LCD manufacturer for further more on the issue.

 

Bye.

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