So, give us new LCD touchscreen options!

davem · 04-12-2005, 07:41 PM

Ok, I have finally tweeked my carPC and it is exactly how I want it. It works every time, ALL the time... and for those of you who have built these things know that is a feat

But my stupid Lilliput has that 'ghost image' problem as well as syncing with the display so every 3 out-of 10 times it comes up blank. How frustrating to have the LCD be the problem in your design!!! Plus, don't even get me started on the brightness!

So who has info on when/if a new HIGH BRIGHTNESS 7" touchscreen will be coming out?!?

There has to be something on the horizon, right!?!?

Scouse Monkey · 04-12-2005, 07:44 PM

i'm looking!!! I found some 300cd/m2 but with that reflective technolgy to make them go brighter in daylight and a 5wire TS (bettert than 4 wire) but they cost £500! ($900) so i doubt you would want to payt hat much!

if anyone has a smached Xenard take the LCD apart and post lots of high res pictures - maybe we can design a new LED backlight system.

lastberserker · 04-12-2005, 07:49 PM

Quote: Originally Posted by davem

So who has info on when/if a new HIGH BRIGHTNESS 7" touchscreen will be coming out?!?

From what owners say around here 7"s have non-standard (for video cards) resolution. So, if a new one comes out, it would be wonderful to have one with more standard resolution

jcdillin · 04-12-2005, 07:51 PM

i'm already working on a upgrading my lilliput brightness

right now i'm just trying more ccfl's but next i'm going to try ultrabright LEDs

Scouse Monkey · 04-12-2005, 07:53 PM

Quote: Originally Posted by jcdillin

i'm already working on a upgrading my lilliput brightness

right now i'm just trying more ccfl's but next i'm going to try ultrabright LEDs

PICS PLEASE!

I have an electronics clean room at work i am eyeing up for doing some kind of brightness mod in!

Scouse Monkey · 04-12-2005, 07:54 PM

Quote: Originally Posted by joshthepilot

One bonus to the hitachi screen (lilliput) is that you can seperate it from the backlight module and the only pcb is that little square corner piece. So if you create a brighter backlight, it is very easy to mount. The panasonic screens have a much larger pcb to have to work with and avoid breaking.

Josh, do you have any exploded pics/diagrams of the panasonic and hitachi LCDs you could send me?

jcdillin · 04-12-2005, 08:10 PM

I can take some more if you want scouse

this is the lilliput raw panel

and the diffusers I pulled from a bigger LCD

jcdillin · 04-12-2005, 08:24 PM

yeah on the hitachi screen, the panel comes off the backlight module

sansoo24 · 04-12-2005, 08:27 PM

Has anyone tried to use electroluminescant material as a backlight for an LCD? I was on a website the other day that sells it in sheets big enough to do a 10 in screen. I was thinking it might give off more light than just a few LED's.

jcdillin · 04-12-2005, 08:28 PM

I have a sheet of it, and it's not bright enough at all

wi77iam · 04-12-2005, 10:45 PM

I was going to try to build a better backlight using some of these led light bars. You can split them into 3 inch sections (3 leds per section) so I want to arrange them to cover as much of the 7 inch screen as possible. I think I can fit 9 sections for a total of 27 leds. They're pretty bright using 12 volts. Maybe put a dimmer to control brightness. Then I just need some kind of diffuser.

ddn · 04-12-2005, 11:19 PM

EL panels are not even CLOSE to the brightness you're looking for.

Remember, even with bright LEDs, you need to diffuse it somehow.

My thoughts are more along the lines of using tinted film to reflect sunlight back out before its able to hit the back reflective panels and wash out the display. I think a layer of 2-way mirror tint would be all you need to solve this problem.

What do OEMs do?

0l33l · 04-12-2005, 11:22 PM

Quote: Originally Posted by ddn

What do OEMs do?

Well, BMW takes the cheap way out and hides the display under a sunvisor

linuxguy · 04-13-2005, 12:50 AM

Quote: Originally Posted by jtp

I would just mount the lcd panel on the end of a 10 Million candle power light.

Ha ha, if only it were possible...
I like the 2 way reflective stuff...i saw some at Home Depot the other day... If i ever get around to driving in the day, i might have to try it...let me know if it work!