Fujifilm Corporation

Shoki Kasahara

Hitoshi Shimizu

Yukiko Nagatoshi

Takeharu Omata

Hironobu Kayano

Kensuke Masui

A projection apparatus capable of, when an image input from an external device and an OSD image are rotated by rotation of a projection lens, performing rotation correction suitable for the respective images is provided. A projection apparatus () includes a housing; a projection lens () that has a holder and that is rotatably attached to the housing; a first rotation position detection unit (A) and a second rotation position detection unit (B) that detect rotation states of the holder; a DMD (B) that outputs, to the projection lens (), a composite image of a projection image output from an external device and an OSD image including a character output from an internal memory; and a control unit that performs rotation correction on the OSD image and that does not perform rotation correction on the projection image based on detection results of the first rotation position detection unit (A) and the second rotation position detection unit (B) when the holder of the projection lens () rotates.

Projection apparatus that performs rotation correction

A projection lens, which is a projection lens to be attached to a projection apparatus body having an electro-optical device, includes: a zoom optical system including a plurality of lenses; a first holding portion that is to be connected to the projection apparatus body and through which light along a first optical axis passes; and a second holding portion through which light along a second optical axis, which is bent with respect to the first optical axis, passes and that is rotatable relative to the first holding portion. The zoom optical system is held by the first holding portion.

Projection lens

A projection device includes: a housing that includes a base portion and a protruding portion protruding from the base portion; a projection lens that projects image light onto a projection target, is disposed to face the protruding portion, and is mounted on the base portion; a prism that is disposed in the base portion to face an incident-side end part of the projection lens; a plurality of transmission type electro-optical elements that are arranged to face a plurality of side surfaces of the prism, respectively; and a semiconductor light source that is disposed in the protruding portion and generates the image light.

Growing community of inventors

Saitama, Japan

Shoki Kasahara