An electro-optical backlighting panel construction for use in portable computer-based
systems having direct and projection viewing modes of operation. In the illustrative
embodiments of the present invention, the electro-optical backlighting panel is
integrated with a LCD display panel, a micropolarization panel, and a touch-screen
writing panel to provide several different types of portable computer-based systems
including, for example, a portable notebook computer, a computer-driven image display
device, and a portable pen-computing device. In general, each of these computer-based
systems are capable of selectively displaying color video images on an actively
driven display surface, or projecting such video images onto a wall surface or
projection screen. These computer-based systems can be easily reconfigured for
projection viewing without any sort of physical modification to the LCD display
panel assembly.
