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Thread: Improvised sunlight readable

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    Btw, I am curious. You said you were considering putting the one-way mirror between the backlight and the lcd? But wouldnt the mirror just reflect the external images back to you (like of your seat). Wouldnt you need to somehow diffuse this sunlight, then reflect it back? Maybe by putting it behind the backlight diffuser.

    shotgunefx: you said you were thinking about backlight upgrades. Are you thinking about just adding more CCFL tubes? If the one-way mirror thing doesnt go too well, a backlight upgrade might help with the sunlight issue. When I took apart my screen, I was actually looking for places to do a potential backlight upgrade too. I was considering using some high brightness LED's, but the problem is how to diffuse the light. LED's deal with the cold much better than CCFL too. My Nokia 6265i cell phone uses 4 leds as backlight and this screen is readable even when I am standing outside at noon.

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    Quote Originally Posted by nobb View Post
    Btw, I am curious. You said you were considering putting the one-way mirror between the backlight and the lcd? But wouldnt the mirror just reflect the external images back to you (like of your seat). Wouldnt you need to somehow diffuse this sunlight, then reflect it back? Maybe by putting it behind the backlight diffuser.

    shotgunefx: you said you were thinking about backlight upgrades. Are you thinking about just adding more CCFL tubes? If the one-way mirror thing doesnt go too well, a backlight upgrade might help with the sunlight issue. When I took apart my screen, I was actually looking for places to do a potential backlight upgrade too. I was considering using some high brightness LED's, but the problem is how to diffuse the light. LED's deal with the cold much better than CCFL too. My Nokia 6265i cell phone uses 4 leds as backlight and this screen is readable even when I am standing outside at noon.
    Yeah, behind the LCD. It will kill a good chunk of the light output from the backlight, but (in theory) it will also reflect the sunlight back out through the LCD panel.

    As far as the backlight, no idea if I want to use CCFLs or go the LED route yet.

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    I think if you put anything like that in front of your touch panel, you are going to have a hard time using it. The touchscreen is where most of the problem with glare and refelection starts. This is basically what is replaced with the transreflective screens mp3car sells.
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    Quote Originally Posted by ThunderStick View Post
    I think if you put anything like that in front of your touch panel, you are going to have a hard time using it. The touchscreen is where most of the problem with glare and refelection starts. This is basically what is replaced with the transreflective screens mp3car sells.
    If that is the case where can we buy a decent touchscreen that isn't milky or reflective?

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    Quote Originally Posted by ThunderStick View Post
    I think if you put anything like that in front of your touch panel, you are going to have a hard time using it. The touchscreen is where most of the problem with glare and refelection starts. This is basically what is replaced with the transreflective screens mp3car sells.
    The only thing in front of the touchscreen now is some 3m privacy film and it hasn't affected use], but I'm talking about putting the half mirror between the backlight and lcd.

    Obviously the touchscreen glare is going to still be a big problem.

    Quote Originally Posted by sxott View Post
    If that is the case where can we buy a decent touchscreen that isn't milky or reflective?
    I was looking at some ELO touch ones on ebay as possible replacements.

    Very well might be wrong but it seems at least part of the problem is the surface of the touchscreen, the way it has that particle like finish to it. I'm tempted to try and buff one with some 2000grit polishing compound and see what happens. Probably just ruin the touchscreen though.

    Anyway after doing some searching around on, had an idea. I'd rather not but I could easily fit a 12" touchscreen (which are a little more common in industry), I'd just have to move my vents in the center console to my empty clock pod. It would be much harder to hide it though.

    Anyone ever thought of ripping apart a Toughbook and using the 1000nit touchscreen?

    My plan is to keep the lilli, but if none of these bear fruit, might start looking at larger ones.

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    Started playing with this and hit a big f*ing problem. While taking apart my lcd, one of the ribbon cable holders broke. The small one that takes the side lead from the lcd itself.

    Fixing it is going to be a PITA.

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    Quote Originally Posted by shotgunefx View Post
    Started playing with this and hit a big f*ing problem. While taking apart my lcd, one of the ribbon cable holders broke. The small one that takes the side lead from the lcd itself.

    Fixing it is going to be a PITA.
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    Quote Originally Posted by Enforcer View Post
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    Quote Originally Posted by MatrixPC View Post
    Window defroster line repair at auto part place is your friend.
    Great tips to know, but it's not a trace problem. The white piece that actually locks in the ribbon cable seperated from the rest of the housing (damn camera is MIA so I can't take pics), so the holder is still there, the ribbon still slips in, but there is now nothing to hold it in place so it falls out.

    I'll probably try and just use a plastic piece folded over a couple of times to act as a wedge to hold it in place. I think that will work when it's all together, but for moving the panel around and trying different things, it's a huge PITA as the lead has no slack.

    Couple of thoughts now that I've actually seen the inside of the LCD panel.

    1. I've heard it mentioned (and read it in some backlight design guides) about using mirrored foil tape on the CCFL side away from the guide to direct double the light out the side facing the light guide. My lilli doesn't have this and wonder how much gain there would be. Don't know if it would double it, but certainly seems like something easy to try for perhaps double the output.

    2. If you used CCFL bending and made your own, you have a couple more inches on the left side where the leads are to fit in some more CCFL, though you'd have to polish off the side so light could enter it better as it has a diffused surface. Other backlights I've seen actually have a mirrored edge on the dead ends to reflect the light back into the guide. Wonder how much is "lost" without it.

    I actually have a backlight I got at Electronics Goldmine that is almost the perfect size and only has the CCFL guide on the left side, so I'm going to put it in (and under) with the current guide to get an idea of improvement, I just have to find the inverter (it's somewhere around here)

    3. Anyone know what the output on the lilliput CCFLs are? Here's a place that claims with their high output inverter 45,000 cd/m2. link

    Now back to the two-way mirror

    It does cut the light output a bit, I'd say probably 30-40% as a guess. Though it doesn't seem to do much in the way of directing it back out. It's going to be a bit of trail and error, but pretty sure it's going to have to sit in front of the films and behind the LCD panel itself to do anything useful. I've got to cut off about 1/8" to get it to fit snug in the panel, otherwise, perfect size for the 8".

    Light that passes through the front gets very scattered once it hits those films. If I shine a flashlight on the front side of the lcd panel (with the mirror behind the films), there is no appreciable change at all and the surface underneath, there is virtually no light hitting it, now if I put the flashlight on the underside, you can easily discern the light making it through to the front.

    That stupid ribbon cable is making this extremely hard as I can't get a picture on the screen as even when clamped, the slightest movement of the housing, it wiggles out.

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