LCD FOR PHOTO SENSING, IN WHICH LIGHT PEN IS COUPLED WITH BACKLIGHT ASSEMBLY

摘要

PURPOSE: An LCD for photo sensing is provided to obtaining a light source for a light pen by driving a backlight assembly, thereby reducing the complicated work for providing light sources for lamp and power supply separately. CONSTITUTION: An LCD for photo sensing includes a backlight assembly(200) for generating first light in response to power supply from the outside, an LC panel(110) for displaying images by the first light, and a light pen(950). The light pen includes a light projecting part for projecting second light by collecting the first light, and a light transmission line coupled with the backlight assembly and the light projecting part for supplying the first light to the light projecting part.