MP3Car.com - View Single Post - NEC 8.4" Transflective Solution

spmclaugh · 09-13-2007, 09:24 PM

Quote: Originally Posted by thermoptic

spmclaugh, no worries, whore all you want

The more information, the better. I saw you were active during the initial transflective upgrades. Glad to see you have returned.

I purchased the 8.4” NL8060BC21-03, which uses CCFL and requires an inverter. I saw that the SR-NLT required the switch, so I opted for the ST-NLT model, which does not.

I mentioned that I'm involved in a project where we are interfacing directly with a TTL/LVDS display, and we just chose the NEC with CCFL also. We are leaning towards the smaller model though. Good catch on the 'R' versus 'T'. We are probably just going to design our own inverter, I think.

Quote: Originally Posted by thermoptic

For the LVDS cable, I recall reading that Motorcity stated that soldering cables to the small pitch HiRose connector was out. He had an expensive crimper for the job.

Yea, I think they're 1 mm pitch or something. Definitely beyond my abilty, though there are probably some old-timers I know that could do it. I'm starting to appreciate paying money for a clean & easy connector... I just spent a week molding and casting a power connector for my HID headlights. Never again.

Quote: Originally Posted by thermoptic

BTW, I would really appreciate your take on IR touchscreens. Pros, cons, favorite manufacturers, etc. I am tracking my touchscreen quest here:

http://www.mp3car.com/vbulletin/1118176-post6.html

Thanks in advance.

Well, they are usually (slightly) lower resolution, so you wouldn't want to use them in some kind of tablet PC with a stylus (for handwriting). And of course, they're a little more expensive.

Also, since the sensors are probably at least 5mm from the screen surface, you get a little parallax error if you use it from an angle. In other words, if your finger is going at an angle, the X & Y coordinates where the beam is broken are not the same as the coordinates where you touch the surface of the screen. But a human finger is already unwieldy enough that I don't think it matters. Everything else about them pure benefits... You can't get a more clear image -- there is nothing but air between you and the screen.

It works kind of like the safety beams on garage doors. Just a bunch of light sources & photo detectors. Break the beam, the photo detector notices, and it tells the computer where you touched.

As far as brands, I didn't do any comparisons. The IRTouch brand from Digikey are the only touchscreens I looked at. I couldn't find many distributors for these things. I'll look a little more tonight and tomorrow, because our project team may be finalizing our decision in the next 24 hours.

09-13-2007, 09:24 PM	#32
spmclaugh Low Bitrate Join Date: Jan 2006 Posts: 108 My Photos: ()	Quote: Originally Posted by thermoptic spmclaugh, no worries, whore all you want The more information, the better. I saw you were active during the initial transflective upgrades. Glad to see you have returned. I purchased the 8.4” NL8060BC21-03, which uses CCFL and requires an inverter. I saw that the SR-NLT required the switch, so I opted for the ST-NLT model, which does not. I mentioned that I'm involved in a project where we are interfacing directly with a TTL/LVDS display, and we just chose the NEC with CCFL also. We are leaning towards the smaller model though. Good catch on the 'R' versus 'T'. We are probably just going to design our own inverter, I think. Quote: Originally Posted by thermoptic For the LVDS cable, I recall reading that Motorcity stated that soldering cables to the small pitch HiRose connector was out. He had an expensive crimper for the job. Yea, I think they're 1 mm pitch or something. Definitely beyond my abilty, though there are probably some old-timers I know that could do it. I'm starting to appreciate paying money for a clean & easy connector... I just spent a week molding and casting a power connector for my HID headlights. Never again. Quote: Originally Posted by thermoptic BTW, I would really appreciate your take on IR touchscreens. Pros, cons, favorite manufacturers, etc. I am tracking my touchscreen quest here: http://www.mp3car.com/vbulletin/1118176-post6.html Thanks in advance. Well, they are usually (slightly) lower resolution, so you wouldn't want to use them in some kind of tablet PC with a stylus (for handwriting). And of course, they're a little more expensive. Also, since the sensors are probably at least 5mm from the screen surface, you get a little parallax error if you use it from an angle. In other words, if your finger is going at an angle, the X & Y coordinates where the beam is broken are not the same as the coordinates where you touch the surface of the screen. But a human finger is already unwieldy enough that I don't think it matters. Everything else about them pure benefits... You can't get a more clear image -- there is nothing but air between you and the screen. It works kind of like the safety beams on garage doors. Just a bunch of light sources & photo detectors. Break the beam, the photo detector notices, and it tells the computer where you touched. As far as brands, I didn't do any comparisons. The IRTouch brand from Digikey are the only touchscreens I looked at. I couldn't find many distributors for these things. I'll look a little more tonight and tomorrow, because our project team may be finalizing our decision in the next 24 hours.