How do you photograph an LCD display? - Electronic Circuits Projects Diagrams Free

blueroomelectronics · 31st December 2007, 10:27 PM

Any tips for getting a decent exposure on a 2x16 backlit LCD?

**Nigel Goodwin** · 31st December 2007, 10:34 PM

Just take a picture of it, I've never had any problems?.

quixotron · 31st December 2007, 10:57 PM

I wonder if the problem is that the camera has some type of polarizing lens that filters out the LCD readout.

Very Curious...

Hero999 · 31st December 2007, 11:16 PM

If it does, just take a picture of it with the display orientated in the same polarisation as the camera's lens and it should work.

Torben · 1st January 2008, 12:05 AM

Quote:

Originally Posted by blueroomelectronics

Any tips for getting a decent exposure on a 2x16 backlit LCD?

These notes are for a Canon PowerShot A520--your camera is probably newer. But I've had good luck with this one. Note that I have no idea what your experience with these things are (I am a self-taught sub-hobbyist photog at best) so I'm just gonna say it all; skip the stuff you already know.

First I turned on all the room lights I could (not much in this log house) and set the camera on a little tripod about 12-15cm from the LCD (sorry about using the printer LCD; it's all I have at mom & dad's).

Camera settings:

o Full manual mode.
o F-stop: 2.6
o Shutter speed: 1/5 second
o Focus: full manual; range: Approx. 12 cm.
o Flash: off
o ISO: 50
o White balance: auto

This ain't exactly National Geographic quality but you can see what's what anyway. Skipping the flash lets the backlight show up without getting washed out.

Hope that's something like what you were looking for,

Torben

kchriste · 1st January 2008, 01:32 AM

Torben's idea is best. Put the camera on a tripod, turn off the flash and let the camera use as long a shutter speed as it needs.
In lieu of the tripod, put the camera on an object and use the self-timer to shoot the scene to eliminate camera shake at slow shutter speeds with the flash off.

blueroomelectronics · 1st January 2008, 02:24 AM

Well I better get a tripod, I use virtual LCDs (thanks to Oshonsoft) for documentation.
The problem must have been the backlight throughs off the cameras meter and it poorly exposest the rest of the image. I'll try a slow shutter.

mvs sarma · 5th January 2008, 03:00 PM

Quote:

Originally Posted by blueroomelectronics

Well I better get a tripod, I use virtual LCDs (thanks to Oshonsoft) for documentation.
The problem must have been the backlight throughs off the cameras meter and it poorly exposest the rest of the image. I'll try a slow shutter.

How about the refresh rate of the display and that should not interfere with the photo. The exposure time should take care of this aspect I believe. whether the polaroid can't be removed for a while!! ( I am not an expert in photographic techniques.

pasanlaksiri · 5th January 2008, 08:07 PM

How about my photos

kchriste · 6th January 2008, 01:10 AM

Pasan,
I'm impressed since it still works with the black wire broken off.

Torben · 6th January 2008, 06:08 AM

Quote:

Originally Posted by mvs sarma

How about the refresh rate of the display and that should not interfere with the photo. The exposure time should take care of this aspect I believe. whether the polaroid can't be removed for a while!! ( I am not an expert in photographic techniques.

Right--with a long manual shutter time the refresh shouldn't be an issue. Hero999 is right about the polarization issue--I don't have this problem with my camera, but I suppose if some camera/LCD combination *did* show this problem, presumably turning the camera sideways should solve it, like it does with polarized sunglasses.

um. . .I think. This advice is worth exactly what you paid for it.

Torben

blueroomelectronics · 6th January 2008, 06:35 AM

Well I managed to get this, the LCD is a little soft (the better photo had a big finger print on the display so I trashed it).

Mike, K8LH · 6th January 2008, 12:52 PM

Looks extremely nice to me...

pasanlaksiri · 6th January 2008, 07:19 PM

Quote:

Originally Posted by blueroomelectronics

Well I managed to get this, the LCD is a little soft (the better photo had a big finger print on the display so I trashed it).

Woooow awesome

Torben · 6th January 2008, 07:59 PM

Quote:

Originally Posted by blueroomelectronics

Well I managed to get this, the LCD is a little soft (the better photo had a big finger print on the display so I trashed it).

Looks great!

Torben

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31st December 2007, 10:27 PM	(permalink)
blueroomelectronics	How do you photograph an LCD display? Any tips for getting a decent exposure on a 2x16 backlit LCD? __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

31st December 2007, 10:34 PM	(permalink)
Nigel Goodwin	Just take a picture of it, I've never had any problems?. __________________ PIC programmer software, and PIC Tutorials at: http://www.winpicprog.co.uk

31st December 2007, 10:57 PM	(permalink)
quixotron	I wonder if the problem is that the camera has some type of polarizing lens that filters out the LCD readout. Very Curious...

31st December 2007, 11:16 PM	(permalink)
Hero999	If it does, just take a picture of it with the display orientated in the same polarisation as the camera's lens and it should work. __________________ I also post at the following sites: http://www.stop-microsoft.org http://www.heated-debates.com Screen name: Aloone_Jonez

1st January 2008, 01:32 AM	(permalink)
kchriste	Torben's idea is best. Put the camera on a tripod, turn off the flash and let the camera use as long a shutter speed as it needs. In lieu of the tripod, put the camera on an object and use the self-timer to shoot the scene to eliminate camera shake at slow shutter speeds with the flash off. __________________ --- The days of the digital watch are numbered. ---

1st January 2008, 02:24 AM	(permalink)
blueroomelectronics	Well I better get a tripod, I use virtual LCDs (thanks to Oshonsoft) for documentation. The problem must have been the backlight throughs off the cameras meter and it poorly exposest the rest of the image. I'll try a slow shutter. __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

5th January 2008, 08:07 PM	(permalink)
pasanlaksiri	How about my photos __________________ Digital Voltmeter PIC16F877 Audio CD Player My home made 2.1 System Nokia 3310 Lcd & Pic12F629 3 channel IR remote Controller Project using 12F Pic Pasan...

6th January 2008, 01:10 AM	(permalink)
kchriste	Pasan, I'm impressed since it still works with the black wire broken off. __________________ --- The days of the digital watch are numbered. ---

6th January 2008, 06:35 AM	(permalink)
blueroomelectronics	Well I managed to get this, the LCD is a little soft (the better photo had a big finger print on the display so I trashed it). __________________ Bill Smart Kits build Smart People http://www.blueroomelectronics.com

6th January 2008, 12:52 PM	(permalink)
Mike, K8LH	Looks extremely nice to me...