Backlighting an LCD-Based Notebook Computer Under Varying Ambient Light Conditions

摘要

In laptop-type computers that use a structure where the top lid of the laptop is mechanically separated into a diffuser / reflective surface and the LCD in its frame. A configuration for improving the observability of a multicolored liquid crystal display, wherein a diffuser / reflector cover is attached via a slider and linkage arrangement such that the diffuser / reflector It can act as a flat field illuminator and move away from the plane of the LCD but in a plane forming a dihedral angle with it. The cover arranged in this way can reflect the ambient light through the plane of the LCD whenever there is an opportunity. In addition, by protruding the cover over the plane of the LCD, a contrast-maintaining shadow is cast, which is otherwise caused by light incident on the LCD viewing surface. It becomes white and bleached.