OPTICAL CONNECTION TO LCD, ETC
Original Publication Date: 1989-Jun-30
Included in the Prior Art Database: 2004-Apr-04
Xerox Disclosure Journal
It is usually expensive and difficult to connect signals to a liquid crystal display, especially when a large number of signals are required. One way to reduce this problem is to put a small control chip on the display substrate. The signals can then be reduced to a power line signal, a ground line signal, and a serial communication line signal. A simpler decode can be used if only a few elements are being controlled (4 bits can give 16 items individually). To make these connections, wires can be bonded to the glass, a pressure connection can be used, or a conductive polymer is mounted between the glass and the circuit board. If the display must be moved (or interchanged) or if it is inconvenient to mount a light behind it, the job of connecting it becomes very difficult - the more lines to connect, the more difficult.