LabVIEW Control of LCD Display

I'm trying find a LabVIEW.vi to control an LCD display ranging from 16x2 to 32x6 with a serial interface. I just started using LabVIEW this summer and the LCD.vi's I've seen are above my comprehension. If anyones had success with this I'd really appreciate the web address, item number and VI you used to drive it. Thanks

Hi,
The VI's that you use are most likely going to depend on what LCD Display you are using, and what type of serial commands it expects. If someone has coded them for your particular LCD Display, then this should be too tough. If there isn't an API for it already, then you'll have to figure out what serial commands the LCD display is expecting. Lets start by getting the actual model of the display screen.
Cheers,
Marti C
Applications Engineer
National Instruments
NI Medical

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hello,
firstly, im stil new to LabVIEW actually...hope someone can help me out with my problem.
thanks a lot for those who willing to help..
im trying to use the DAQ USB6008 to simulate a 16 x 2 character LCD display.
im using LabVIEW 8.5...
can anyone teach me how to simulate the LCD using LabVIEW and the DAQ USB6008 ?

The good news is that the 6008 has 12 digital lines so you don't have to work the data in two 4 bit operations. It also looks like the data is represented as ASCII. You will convert each character you want to display into a string and you can type cast that to a numeric. Wire that value to a digital DAQmx Write. Something like is shown below. It does not show the control lines. It looks like you would just need to add the signal to clock the data in.
Message Edited by Dennis Knutson on 07-05-2008 12:18 PM
Attachments:
Write to LCD.PNG ‏5 KB

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Attachments:
tab_example.vi ‏24 KB

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Thanks for the suggestions ramses64.
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AFAIK the only way a _driver_ could wreck a monitor would be to change the refresh rate too high or resolution too high (and most monitors will recognize this and just turn themselves off.) Obviously the driver didn't "wreck" OP's LCD display because the display works when he installs the old driver.
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My 2 cents.
Message Edited by Xoxor on 07-5-2008 03:35 PM

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Message Edited by radical24 on 02-Feb-2009 10:35 PM
You know what I love about you the most, the fact that you are not me ! In love with technology and all that it can offer. Join me in discovery....

I have a slight crack in my mac book pro screen it is just on the top of the screen and the LCD display is working fine. i was wondering how much it would cost to fix it/ replace it.

i have a slight crack in my mac book pro screen it is just on the top of the screen and the LCD display is working fine. i was wondering how much it would cost to fix it/ replace it. it is not a pressing matter but if it is cheep to fix then i would like to do so

Most of us wouldn't know that here. Call your Apple Store.

About monitors and LCD displays

I want give you some directrices about the display sub system.
Like you all know there are CRT monitors and LCD displays.
CRT
CRT monitors are based upon electron beams hitting Electroluminescent phosphorus. In these monitors the most important parameters are:
1) Dot pitch
2) Refresh rate
Dot pitch is the size of a single phosphorus point, smaller is better. Typical values range between 0.24 and 0.25. Beware with monitors having a not constant dot pitch, there are monitors with dot pitch of 0.24 at center of screen and 0.25 at the borders. I recommend monitors with constant dot pitch size across all screen.
Refresh rate is the number of times a single electron beam travels across the screen drawing a single frame (from left to right and top to bottom) each second. It is measured in Herz (Hz). Bigger is better. Typical values range between 60 Hz and 120 Hz and the value depends upon resolution, more resolution goes to less possible refresh rate. If you are going to play games with shutter glasses, make sure your monitor is capable of 120 Hz minimun at the playing resolution. In 3D Stereo, each full 3D frame must be drawn 60 times/second (60 Hz) but a 3D frame is a single right eye frame and a single left eye frame, 60 Hz for left frame and 60 Hz for right frame are the full 120 Hz. If you CRT is not capable of these 120 Hz your eyes will suffer fatigue / strain and you would have a great headache after prolonged time periods.
LCD
A LCD display do not uses a electron beam to excite phosphorus and generate colored points, instead this it uses a grille and a special lamp. Instead drawing a frame line at line from top to bottom and left to right, it renders the frame in a step only and continuously, these displays are flat for this, there is no necesity for high voltage and magnetic fileds to move the electron beam. In these displays these are the more important parameters:
1) Dot pitch
2) Response time
3) Number of colors (color space)
Dot pitch is the same as with CRTs
Reponse time is the time it gets going from pure white to pure black. Less is better. It is measured in miliseconds. Good typical values range about 16 ms. If you are going to use the LCD to play games, response time is the more important parameter at all.
Number of colors are the simultaneus colors in screen. It have a inverse relationship with response time. It is measured in million of colors or bits. 24 bits of color depth are 16.7 million of colors. Typical values range agout 16 / 16.7 millions. Greater is better. LCDs with 16 ms response time have, usually, 16.5 millions of colors.
Somethimes, the manufacturer will provide you drivers (setup or inf files) for your operating system. I recomend install this drivers. Don't panic if there are no drivers for your display device, Windows, probably, will find the suitable driver for your brand and model.
If you have a CRT and you are stuck at 60~85 Hz you will need the right driver because Windows would not have found a suitable driver from its drivers base and it chose a standard monitor driver.
If you have a LCD and you are stuck at 60 Hz, all is fine, as i have told you yet, LCD displays paint the screen continuously, you will not appreciate any flicker at 60 Hz in these devices. You can check this if you have a digital camera, make a photo of a CRT with a shutter of <monitor refresh rate> * 1.5. You will see a partially drawn picture. If you take a photo of a LCD with the same shutter rules you will get a full picture. With LCD you will get full pictures always, independently of the shutter.
I hope al this info will be helpful to you.

I have found a very interesting link on the Anandtech Web site about LCDs, it is a old one but i think it will be useful.
The link is this

LabVIEW Control of LCD Display

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