Abstract: A projector and a projection system are provided. The projection system includes the projector and a mobile device. The projector receives an audio-visual signal coming from the mobile device via a default wireless domain when the projector is connected to the mobile device, and outputs an image according to the audio-visual signal. The projector also charges the mobile device.

Abstract: A projector includes at least one light source module, at least one light valve module, a projection lens, and at least one heat dissipation structure. The at least one light source module is configured to provide an illumination beam. The at least one light valve module is disposed on a transmission path of the illumination beam and is configured to convert the illumination beam into an image beam. The projection lens is disposed on a transmission path of the image beam and is configured to project the image beam. The at least one heat dissipation structure is connected to the at least one light valve module.

Abstract: A projection apparatus includes a frame body, an optical engine module disposed in the frame body and including at least one light source and a light valve, a projection lens, and a first heat dissipation module. The light source provides an illumination light beam. The light valve located in a transmission path of the illumination light beam converts the illumination light beam into an image light beam. The projection lens located in a transmission path of the image light beam projects the image light beam. The first heat dissipation module is disposed on the frame body and contacts at least one of the light source and the light valve. The frame body and the first heat dissipation module together form at least part of a housing of the projection apparatus. A thermal conductivity coefficient of the frame body is less than that of the first heat dissipation module.