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Topic: Display for Direct Sunlight (Read 5520 times) previous topic - next topic

midnight_coder

I need a graphical display that's usable in direct sunlight. It looks like I need a transflective model, but I don't see any on sparkfun or adafruit or 4Dsystems.

I'm looking for a high quality display, not the cheapest. Monochrome or color is good. Don't monochrome displays usually have higher contrast which would be more usable in direct sunlight? Touch screen would be awesome.

I looked at e-ink displays, but they update the screen too slowly.

Where can I buy one?

Any recommendations for brand or model?

robtillaart

#1
May 16, 2011, 11:14 pm Last Edit: May 16, 2011, 11:23 pm by robtillaart Reason: 1
Quote
but they update the screen too slowly.

Can you state your requirements

- readable: in sunlight
- refresh rate:
- color/BW: X
- size in pixels:
- interface:
- touch: yes
- weigth:
- other?
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

midnight_coder

google found a few:

http://www.allshore.com/lcd_displays/tft_modules.asp
http://www.tianma-usa.com/index.php?mod=productmgr&task=product&export_excel=true&idcat=3
http://www.alpincorp.com/sunreadlcd.html

the down side is that they all require RGB inputs which is probably too complicated for me.

midnight_coder


Quote
but they update the screen too slowly.

Can you state your requirements

- readable: in sunlight
- refresh rate:
- color/BW: X
- size in pixels:
- interface:
- touch: yes
- weigth:
- other?


- readable: in sunlight
- refresh rate: 0.1s
- color/BW: doesn't matter
- size in pixels: doesn't matter
- interface: preferably one that's supported by an existing library
- touch: yes
- weight: doesn't matter
- size: 2.5"-4.0"

I'll be using it to display measurements (temperature, humidity). I want to put some 1" tall number on a bright screen so it's legible in direct sunlight.

robtillaart

Quote
display measurements (temperature, humidity)

Have you considered 7 segment displays ?

See - http://www.sparkfun.com/products/8546 - 1"
or - http://www.sparkfun.com/products/8530 -  6.5" (how about readability ;)

You need "-100.0 F" and "100.0 H". You might "optimize" the decimal part away and switch between T & H every two seconds. => minimal 5 digits can do the job.
Rob Tillaart

Nederlandse sectie - http://arduino.cc/forum/index.php/board,77.0.html -
(Please do not PM for private consultancy)

mrprecise

I have a Kindle, and it is very readable in bright sunlight. It does grey scale photographs in quite good detail, and has a USB port, and a cursor/joystick. Amazon has some good info on the screen type, but not a full tech analysis. It definitely is not an LCD screen. There may be some info out "there" on hacking it, but the small model with 7" screen sells for about 135.00, so it's not a cheap option for hacking. The "readability" in bright sunlight is their strong selling point. It is very close to a sheet of paper with black print.




 

mrprecise

Sorry I missed your comment about E-ink displays. I think Kindle is that type. However, my unit updates the page pretty fast. I would not call it slow at all., although I have read some of the other E-readers are quite annoying due to slow update.

liuzengqiang

I bought a character LCD from adafruit a while back, the one with white text against blue background. It's impossible to read without back light but under direct sun it's quite readable.
Serial LCD keypad panel,phi_prompt user interface library,SDI-12 USB Adapter

TonyD

Have you looked at LCD's from Kent Displays. Sparkfun have them:

http://www.sparkfun.com/products/9560

I've been told they're pretty readable in sunlight

sjernigan

I'm right there with you. EInk is too slow. TFT is too dim.  I've used the character LCD displays with good results but limited in what you can show.  The linked product looked good but is discontinued.  Did you end up finding another suitable product?

bitbank

I really like the UC1701 LCDs. The size is about 2" diagonal and 128x64 resolution. Super low power, easy to program over SPI, nice even backlight (when needed) and cost $4-5 in single piece quantities.

Library? We don't need no stinkin' library...we write our own

olikraus

Similar discussion here: https://forum.arduino.cc/index.php?topic=488097.0

If you know, that you never need this display during night, then use a reflective version.

Oliver

odometer

I'll be using it to display measurements (temperature, humidity). I want to put some 1" tall number on a bright screen so it's legible in direct sunlight.
In that case, why not use digits like these?
http://coytbarringer.com/flip-display-clock/

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