Focus LCDs

Yes, backlights on: character, mono graphic and segment displays are independent of the LCD driving voltage. The ability to turn off the LED will save battery life. In many cases, the backlight will draw more power than the LCD.

As a general rule, each LED requires 15mA. It is possible to overdrive this to make it brighter, but this will shorten its half life.

No, A and K are not the only place to add power to backlight on a LCD. Many character LCDs have pin 1 and pin 2 connected to A and K. So choose what is best for your new design.

On a character LCD, and other LCDs, R/W stands for Read Write for talking between the LCD and the Arm or pic or processor.

On a segment displays, the LED backlight is powered through a separate cable that has some type of Molex connector on the end. One wire is red, and one is blue. On a character LCD, the LED backlight can be powered through pins 15 and 16, or through the A and K on the side of the display and pins 1 a...

Yes, it is possible to use pins instead of a FPC cable for a segment LCD using a spi interface, but not recommend. We suggest the fpc cable.

No, not all the glass can be used to display a segment. There is a dead area of about 1mm all the way around the glass where the pins make connection with the ITO glass. Also, this is the area that is used for the bezel to hold the display to a PCB.

It is not common for a character LCD to require a negative voltage. Years ago it was necessary to handle colder temperatures, but current TN fluids have removed the need for negative reference voltages.

Normal lead time for a custom segment (aka static) display is around six weeks for samples and eight weeks for production units. this changes around Chinese New Year, which will add another two to four weeks.

TAB also called Tape Automated Bonding, is an older technology method no longer in production. It is best to use a COG = Chip on Glass