Going full custom allows for almost anything. As seen can be seen in the photos to the right, the PCB shape is not simply rectangular. There is a hole to fit around other mechanical parts. The actual size of the LCD is 30x10 mm and has 8 characters in 5x7 dot format. We even squeezed in an LED backlight for easier reading inside the machine.
The display driver/controller is a standard character LCD module controller, such as KS0066U or similar. To interface with the host processor and also store data for the engineer we added a small masked 8 bit micro controller. Included in the firmware is also a test program to test the entire unit before installation into the final application.
Due to space availability and cost, we used the already running COB bonding facility in the display factory. Customer is free issuing the micro controller in as a naked chip with the firmware masked. We did start the first pilot production up using OTP versions, but running 100k's the cost saving using a masked processor is significant.