Continued from post #7695
I have the "halo/prism" problem with my HL-T5687S. Based on what I read here, it's pretty bad on my set. Here's an example using a test image that I created:blueblob
Here's an example using an all black picture and bringing up the WiseLink menu for the picture:menu
The problem is frequently noticeable during regular viewing as well. I could probably come up with a more obvious example, but I had to laugh at the coincidence of this one.
(They're speaking Japanese. The caption is part of the original broadcast. I didn't add it.) You can see the halos below Hiro's ear. Also, purple smudges under the letters "is every" and to the left of the point between the girl's finger and thumb. This image is overexposed by 1 stop to highlight the problem but they appear at least this bad when viewed. Eyes can pick out these things better than a camera can.heroes
Using the WiseLink viewer with JPEG images that I created, I also found another reflection that appears as a reddish beam of light when there is bright light in the upper corners. This is very faint and probably not noticeable during regular viewing. Here's an example:redline
If you want to test your set for the halo/prism problem, you can use my test images, in addition to the tests already made available in other postings in this thread. Grab the following tv_tests.zip file. Unzip and load the images onto a flash drive, or something else that you can read from the "Wiselink" USB port, and view them. The images are of size 1920x1080 and each consists of a single white circle on an all black background. The circles are each on a point of a 16 by 9 grid. In the "a" series, the circles are 120 pixels in diameter. The "b" series are 240 pixels in diameter. The file names indicate the row_column position of the circle in the grid. I get the most noticeable effects from row 5 downwards and around columns 4-6 or 11-13. Dont worry about the roughness around the edges of the circles. These are just artifacts due to heavy JPEG compression.tv_test
Another thing you can do is display image a_05_08.jpg. Press "info" to bring up the menu and then zoom the image to 2X. You can then use the arrow keys to move the circle to anywhere on the screen.
There are some additional 1920x1080 image files in the package. black.jpg is all black. white.jpg, red.jpg, green.jpg and blue.jpg are white and colours at full intensity. grey.jpg is all colours at 50%. Note that these images may not be perfect, again due to JPEG compression artifacts.
grid.jpg is a white grid on black that you can use to check the linearity, alignment, and maybe focus and chromatic aberrations, of your set. The lines are two pixels wide and 40 pixels apart. The centre vertical and horizontal lines are 4 pixels wide. The borders (which you probably won't see due to overscan) are one pixel wide.
If you want to see what people call the "rainbow effect" (RBE) and don't normally see it (I don't), you can probably see it using grid.jpg. Rotate your head quickly back and forth, causing your eyes to scan the screen. The vertical lines should break up into multiple colours.
Now, as for the situation with my set. A technician from a Samsung authorised company came to look at my set. He said he'd never seen these models before and didn't have any information on them. He didn't even know that Samsung made LED illuminated DLP sets. He made notes on my problems and said he would contact Samsung about them. On Mon. Nov. 5 I got a phone message from him saying that Samsung was sending parts to fix the problems and he would contact me when they were in. I haven't yet called to see what parts they are or when they should arrive. Hopefully it's a complete new light engine, or this new black coloured lens assembly that's been mentioned. I'll keep you posted.