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Suggestions for PDA-sized color LCD

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kender

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pda size

Colleagues,

There's a host of nice LCDs out there, but I'm floundering trying to pick the one to work with. All I want to do is to be able to display colored text. My system will be based on LPC2129 or similar.

This one came close, but it's a bit small. https://www.crystalfontz.com/product/CFAF320240F-T. What's nice about it is that it can be connected to uC through SPI. If it were 240x320 (portrait orientation) and if it were 4 inches wide (about 100mm), it would be perfect.

I would appreciate and suggestions or insights!

- Nick

P.S. I don't forget to click "helped me" for those who helped.
 


pda size 4 inches

Here are some other types, from Optrex: **broken link removed**

The "problem" with these (and many other displays) is that they are made for landscape orientation and either 6 or 12 o'clock viewing direction.

If you turn one of these 90 degrees to portrait orientation it might be illegible.
So what you really need is a display made specifically for portrait display - and the existing ones are small to suit PDAs and cell phones.

I've seen displays of the type you are looking for - but that was in Star Trek: The Next Generation... :wink:

/Ram
 

troubleshooting pda lcd display problems

XNOX_Rambo said:
I've seen displays of the type you are looking for - but that was in Star Trek: The Next Generation... :wink:
Click to expand...
Actually, I saw a perfect display 2 days ago. It wasn't a movie. It was a peristaltic pump in a hospital. Take a look at the photo.

IMG_0837.jpg
 

color lcd sizes

the big issue is not finding the big size display. go to any mobile repair shop and he can give you a big LCD display. the main issue is to find the pin schematics and controller details.

look at LG KP500, it has big 4" display with touchscreen but i could not find any controller details.

hock
 

color 24-bit lcd odd size

hock, if somebody asked you to build a 1st prototype of a uC-based device with a color LCD in a few weeks, which LCD would you choose?

hock said:
the main issue is to find the pin schematics and controller details.
Click to expand...
This is a barrier with several main issues. They are like layers of the onion.

1. Suppose the pinout is known. It will probably has dozens of pins, because nowadays most modules would have 24-bit color.
2. Suppose the uC has enough pins. I have a feeling that the developer has to write a thousand lines of code just before first demonstrable results (e.g. a few lines of colored text) appear on the LCD.
 

pda size lcd

hock said:
look at LG KP500, it has big 4" display with touchscreen but i could not find any controller details.

hock
Click to expand...

Hock, if you would have read kender's/Nick's initial post properly you would have seen that he needs a display that is
about 4 inches wide in portrait orientation, not 4 inches diagonally.
The requested diagonal size would therefore be 6.7" (assuming a 4:3 display).

Do you have such humongous cell phones in India?! :)

Back on topic, I have searched but the readily available displays I found in that size all have complex (non-serial) interfaces.
I guess the medical (expensive!) portrait example you found is custom made.

/Ram
 

color 24-bit lcd touch screen

i will be happy if i get even a 4" diagonal display with chip details.
can some one share the details of the biggest size mobile display they have used. i am more interested in mobile display as they are cheap and long term availability is assured.

hock
 


datasheet lcd grafik optrex japan

You can watch the display used by Microchip on the demo board AC164127- Graphics PICtail Plus Daughter Board, with touch-screen. I have one, very nice, but probably a little small for your project. Driver and display are sold separetly on Microchip website (only in small quantity of course), at a good price, I've already seen it, but I can't find it this time.
 

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