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A way to adjust the backligh brightness of a GLK12232-25 LCD
Posted: Wed Aug 25, 2004 2:42 pm
by shasson
Hi,
Recently when some random characters were sent to my GLK12232-25 LCD, the backlight intensity or brightness appeared to lower. I was wondering if it is possible to change the backlight brightness witha command? If not, has anyone seen this happen before?
I can tell the backlight is still functional by looking behind the LCD, but there is a noticable difference in the intensity since the incident.
Thanks.
Posted: Thu Aug 26, 2004 10:09 am
by Miles
Try sending the following command:
Set backlight brightness (254 153 [brightness])
This command sets the display's brightness to [brightness], where [brightness] is a value between 0x00 and 0xFF (between 0 and 255). The higher the number is, the brighter the backlight will appear.
A way to set and save the brightness of the backlight?
Posted: Fri Aug 27, 2004 12:38 pm
by shasson
Hi,
Thanks for the information on setting the backlight intensity. That command looks like it sets the brightness of the backlight, but does not save the brightness for the next time the LCD is turned on. Is there a way to save the backlight intensity for the next time you turn on the LCD?
Thanks.
Posted: Fri Aug 27, 2004 1:05 pm
by Tom
The command below will allow you to adjust the brightnesss and save it.
(254 153 [brightness]) . This command works the same way as the other command that Miles posted except it will save the brightness for you afterwards.
two seperate commands?
Posted: Mon Aug 30, 2004 8:13 am
by shasson
Hi,
I was just wondering if there were two seperate commands. One command to set the brightness without saving and one command to set the brightness with saving (this thought is based on the contrast setting having two commands). The same command was listed in the previous two posts. There seem to be no commands listed for LCD brightness in the manual for my particular LCD.
Thanks.
Posted: Mon Aug 30, 2004 8:44 am
by Tom
Your right on that being two commands. One is for saving, and the other is for not saving the display setting.
Posted: Tue Aug 31, 2004 7:49 am
by shasson
But both of you gave me the same command: 254 153 [brightness]. What are the two different commands?
Thanks.
Posted: Tue Aug 31, 2004 9:21 am
by Tom
The only difference between these commands is one of them saves the setting and the other one doesn't.
Posted: Tue Aug 31, 2004 12:40 pm
by Miles
Sorry about the confusion...what I think Tom meant is; 254 154 [brightness]...This command will change the backlight intensity and save it to the EEPROM...
Are you sure 154 is a command for the GLK12232?
Posted: Tue Sep 07, 2004 8:15 am
by shasson
Hi,
I tried out that 254, 154, intensity command on my LCD. It doesn't appear to do anything. The intensity value gets treated as a character and gets shown on the LCD. Any suggestions?
Thanks.
Posted: Tue Sep 07, 2004 10:41 am
by Tom
Did you send it like the other command?
Yes
Posted: Wed Sep 08, 2004 5:56 am
by shasson
Yes
Posted: Wed Sep 08, 2004 9:17 am
by Tom
Try this command 254 152 [brightness].