Presentation system using laser pointer
AssigneeFuji Photo Optical Co., Ltd.
InventorsAkinori Hamana, Mitsuyoshi Nishimura
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Abstract
A presentation system comprises a screen, a laser pointer operated by a user to project laser beam on the screen, and an infrared light projector for emitting infrared light on the entire surface of the screen. The laser pointer comprises an infrared light receiving section directed in the same direction as a projection direction of laser beam for receiving infrared light projected from the infrared light projector and reflected from the screen, and a control section for causing the laser pointer to project laser beam only while the infrared light receiving section is receiving infrared light.
Claims6
A presentation system comprising:
- a screen;
- a laser pointer operated by a user to project laser beam on the screen;
- and
- an infrared light projector for emitting infrared light on the entire surface of the screen;
- wherein the laser pointer comprises:
- an infrared light receiving section directed in the same direction as a projection direction of laser beam for receiving infrared light projected from the infrared light projector and reflected from the screen;
- and
- a control section for causing the laser pointer to project laser beam only while the infrared light receiving section is receiving infrared light.
A presentation system comprising:
- a screen;
- a laser pointer operated by a user to project laser beam on the screen;
- an infrared light projector provided in the laser pointer for emitting infrared light in the same direction as an emission direction of laser beam;
- an infrared light receiving section for receiving infrared light emitted from the infrared light projector and reflected from the screen;
- and
- a control section for causing the laser pointer to project laser beam only while the amount of light received by the infrared light receiving section is equal to or greater than a predetermined amount.
Dependencies are inferred from the claim text.