Abstract: A projector includes a housing, an optical unit, and a heat transfer module. The housing is made of a material with high thermal conductivity having a window. The optical unit is accommodated in the housing and further includes a light source, a panel, and a projection lens. The light source provides a light. The panel modulates the light. The projection lens projects the modulated light to leave the window. The heat transfer module is accommodated in the housing and connected the optical unit and the housing to transfer heat from the optical unit to the housing. Particularly, the projector is a cooling-fan saved projector. In addition, the projector further comprises a computer card adapter and a computer card inserted into the computer card adapter.

Abstract: A head-mounted display apparatus for a first external video source and a second external video source includes a support, an optical unit, a receiver, and a micro controller. The support is to be worn on a user's head. The optical unit displays video for the user. The receiver selectively receives video signals provided from the first external video source or the second external video source. The micro controller is electrically connected to the receiver for processing the signal to control the optical unit to display the video.

Abstract: A head-mounted display comprises a wearing frame able to be mounted on head, a support frame, a video output terminal module and at least one display unit. Since the display unit can be combined with or detached from the video output terminal module, the head-mounted display can be changed into right-eye mode, left-eye mode, or twin-eyes mode. The video output terminal module is connected to the wearing frame through the support frame. The support frame is used to adjust the relative positions between the wearer and the display units along a vertical direction, a transverse direction, or a front-back direction.