C library for driving a T6963C-based LCD screen from a Raspberry Pi.
I successfully run it to control a DG-24128-01 Datavision LCD display, and control it from my Raspberry.
As you can see, the T6963C need 3 separate power supplies :
- +5V for logic
- -15V for LCD (this power can easily be achieved from a +5V with the aid of a TL497 chip)
- a 75V AC for the backlight. You'll need a CCFL for this, which cannot be powered from a +5V. In my case, I found you that could be driven with a +12V tension)
The T6963C needs at least 10 control data lines (12 is better, however, FNT and REV are optional and may be hard-wired)
To spare several GPIO outputs on the raspberry, I chose to use an HC595 shift register, which can generate 8 data lines from 3 coming from the raspberry :
Finally, here is the wiring schema for the T6963C.
Some inputs are hard-wired :
| Pin | Value | Explanation |
|---|---|---|
| /RD (Read) | 1 (=5V) | We never set the display in READ mode |
| /WR (Write) | 0 (=0V) | For the same reason, the display is always in WRITE mode |
| RST (Reset) | 1 (=5V) | Attached to +5V through a capacitor/resistor network (100nF/10kΩ). See T6963C data sheet. |