Laptop computer with detachable display for overhead projector

A laptop computer comprising a main computer body and a display unit rotatably mounted to said main computer body and electrically actuated by the same,

• said display unit including a hollow display casing having a pair of window openings, a transparent LCD monitor display provided inside said display casing between said window openings, a cover piece detachably mounted to said display casing at one of said window openings, said cover piece having a mirror surface disposed adjacent to said monitor display, and a display driver circuit means disposed inside said display casing to actuate said monitor display, said display casing having a first hinge side detachably hinged to an adjacent second hinge side of said main computer body, said display driver circuit means including a first electrical connector provided on said display casing, said main computer body having a second electrical connector engaging said first electrical connector when said first and second hinge sides are connected, said laptop computer further comprising an extension cable to electrically connect said first and said second electrical connectors when said display unit is detached from said main computer body, and means for detaching said cover piece from said display casing for enabling said display unit to be used as a slide for an overhead projector.