Help to find info of an LCD

Other Hardware Displays
1

Hello

I got an LCD that I can't source info

  • On the back it is write Data Vision Phico D-0 94V-0 9930. This number seem to be a generic model.
  • It has a 20 pins connector . The LCD on the module is 7.5 cm X 5.5 cm

I wanted to install an I2C module on it but the module has 16 pins and the LCD 20.

Any info appreciated.

Martin

2

I took some photo if it could help to find Info.

How can I interface the LCD with an I2C module? The screen has 20 pins and the I2C module 16.
Martin

Not the best photos,

1632×1224 197 KB

1632×1224 261 KB

3

Its an DG-12864-12. You can find the pinout here: http://www.datavision.com.tw/en/lcm_02_1.php?P_Id=32

The I2C-LCD adapter for character LCDs use the 4-bit mode of the controller. The controller on this display does not have it.

Also this dsplay needs a negative voltage for the contrast.

4

Rintin,

Wow! thank you very much for this info.

I was about to give-up. Will see if I can use it.

Martin

5

This is a display with a T6963 controller. If you really want to use this display, then make it work in 8-bit parallel mode first:

  1. Provide the -5 V external power with the var-pot
  2. Find a suitable library (e.g. u8g2) and do all the wiring

If this works, you could start with the i2c adapter. But: There will be no Arduino lib and also the number of adapters is very limited (google reveals only this: https://www.coptonix.com/_en/html/i2c_glcd_adapter.html)

I personally would say, it is not worth the effort. Look out for a ST7565 based LCD module. It includes the negative voltage generator, includes an electronic var pot and comes with a SPI interface. Maybe an ST7920 is also an option.

Oliver

6

olikraus:
This is a display with a T6963 controller. If you really want to use this display, then make it work in 8-bit parallel mode first:

  1. Provide the -5 V external power with the var-pot
  2. Find a suitable library (e.g. u8g2) and do all the wiring

If this works, you could start with the i2c adapter. But: There will be no Arduino lib and also the number of adapters is very limited (google reveals only this: https://www.coptonix.com/_en/html/i2c_glcd_adapter.html)

I personally would say, it is not worth the effort. Look out for a ST7565 based LCD module. It includes the negative voltage generator, includes an electronic var pot and comes with a SPI interface. Maybe an ST7920 is also an option.

Oliver

That's what I have conclude. Not worth to work on this. Better spend few dollars to get another LCD

Thanks to all who helped me with it.

Martin

7

Hello,the lcd you have and the DG12864-12 is different you need to go to the philco document and ID your correct board also the -5vdc supply is not difficult to build from a junkbox. I do this for fun and the challenge is getting these to work.