The LCD panel with 4 optical buttons.

Documentation on the parts used by EBCS LCD board.

Documentation (1)
hd44780u.pdf	Dot Matrix Liquid Crystal Display Controller/Driver
CD4001.pdf	Quad NOR gate
CD4081.pdf	Quad AND gate
TL071.pdf	Low Noise J-FET Operational Amplifier
74HC164.pdf	8 Bit Sipo Shift Register
74HC273.pdf	Octal D Type Flip Flop With Clear
BS170.pdf	N-channel vertical D-MOS transistor
CNY70.pdf	Reflective Optical Sensor with Transistor Output

(1) Documentation publicly available on various constructor web sites and copied here for archiving.