Adjusting Brightness of NEEK's LCD

mmmmm, ok, here is the link for terasic trdb_ltm module data sheet,

http://www.terasic.com.tw/attachment/archive/213/trdb_ltm_userguide.pdf

In page 30 you can find "Register map of the LCD Driver IC" here is the register description for brightness and gamma curve.

Compare with alt_tpo_lcd_init function in alt_tpo_lcd.c from example.

Thanks for the reply.

Yes the brightness is in fact good for synthetic images. But for the NTSC cameras (OV7950 camera modules) I am using ,due to the transformation which I am applying on my input video, I am loosing some image information due to which the images are getting darker. So I wanted to specifically increase the brightness of my LCD but although it is written in the demo guide that you can adjust brightness , gamma correction etc, I am unable to locate those registers!!! I am using the same LCD daughter board wich is being use in NEEK.

Any help!

Rama

LCD brightness in second example, as i can see on my Neek, is good.

What about increasing the camera lens aperture? If you have a TRDB module or something like that, it can be done by setting the register 0x09.

Thanks for the info!

Actually I have started with the second design only and everything is working for me. Its just that the images coming from the camera look very dark on the LCD Screen, so I wanted to adjust the brightness of the LCD but (may be I missed it) I am not able to figure out the registers where to do it?

Any help will be much appreciated,

Thanks,

Rama.

Neek's LCD control registers are accessed using I2C.

For a pure hardware example check demonstration MTDB_LCD_TV at: http://www.terasic.com/downloads/cd-rom/mtdb/mtdb_system_cd_v2.0.zip

For a Nios II based system example: http://www.altera.com/support/examples/download/nios_lcd_3c25.zip