LCDInfo.com

http://www.lcdinfo.com
It is currently Tue May 21, 2024 9:15

All times are UTC + 2 hours




Post new topic Reply to topic  [ 3 posts ] 
Author Message
PostPosted: Mon Jun 28, 2004 21:45 
Offline

Joined: Mon Jun 28, 2004 21:40
Posts: 1
I'm trying to set up the MGLS 320x240 but I cant get it to display the whole screen. Datasheets and other documents are confusing.
I would like to know when to activate /DISPOFF signal and when to refresh the image so the LCD doesnt turn black.
I can get the nibbles into the shift registers but when I try refreshing more than 120 lines the screen turns completley dark... If you have some information it would be very helpful!... Thanks!!


Top
 Profile  
 
 Post subject:
PostPosted: Tue Jun 29, 2004 9:51 
Offline

Joined: Sun May 05, 2002 22:05
Posts: 2063
Location: Lappeenranta, Finland
What are you using to control the display ? Some microcontroller, FPGA or something else ?

This document has some information about the /DISPOFF and other issues with this kind display: http://www.seiko-usa-ecd.com/lcd/produc ... g321ev.pdf


Top
 Profile  
 
 Post subject:
PostPosted: Mon Jul 05, 2004 13:28 
Offline

Joined: Sun May 05, 2002 22:05
Posts: 2063
Location: Lappeenranta, Finland
Antonio Ramos wrote:
I am using a microcontroller to control the display.
About the display I can get the characters into it and I can see the X and Y axes signals are working fine. The FLM signal looks good and I think it does the trick. (I dont know what 1/240 Duty means)
In the datasheet there is a line " 1/240 Duyt, 1/17 bias "...
The thing is that if I connect the dispoff signal to vcc the lcd gets very dark, and if i connect it to GND it doesnt display anything.
If I switch the signal on and off with the microcontroller I can get half of the LCD to work, but when I try to display all the screen it gets dark again (even if I can get half of it to work with the same code!)
I cant adjust the brightness of the LCD. Maybe my code is right and the brigtness is making the LCD turn dark.

any suggestions??

Do you have a link to the datasheet as I haven't yet seen it ?

As you're using microcontroller are you sure your code executing fast enough to drive the full screen and meet the timing requirements ?

I haven't yet controlled displays like this myself so I can't speak from experience, only what I've read from datasheets. But I'm planning this so I have gathered some information.

Seeing the datasheet might give some ideas.


Top
 Profile  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 3 posts ] 

All times are UTC + 2 hours


Who is online

Users browsing this forum: No registered users and 1 guest


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum

Search for:
Jump to:  
cron
Powered by phpBB® Forum Software © phpBB Group