Maxell, Ltd.

Hitachi Industry & Control Solutions, Ltd.

Hiroyuki Shinji

Koji Hirata

Hiroyuki Nakamura

Satoshi Nakayama

Kazuo Shikita

Tatsuya Ishikawa

Nobutaka Hotta

Miyuki Ikeda

A projection video display device includes a projection video display main body (main body) including a light source and a video display element and generating a video to be projected, a portrait converter that rotates the video generated by the main body around an optical axis by 90&#xb0;, and a projection lens that magnifies and projects the video rotated by the portrait converter. The main body rotates directions of OSD (On Screen Display) images and in the video generated by the video display element to an opposite direction to or in the same direction as a rotation direction of the video by the portrait converter by 90&#xb0;. Accordingly, the OSD image can be displayed in a direction in which it is easy for the user to see in portrait projection screens.

Projection video display device

Provided is a projection-type image display device which by means of a projection lens () magnifies and projects an optical image formed by a light source and an image display element, wherein an error indicator () for indicating anomalies in the device is disposed on the rear surface opposite the front surface of a device housing () to which the projection lens () is attached. The projection-type image display device further includes an AC voltage monitor unit () for monitoring voltage waveforms supplied form an external power source and retaining voltage waveform data during the latest prescribed period in a memory, and reads out the voltage waveform data from the external power source retained in the memory and displays the voltage waveform data on the error indicator () as said anomalies.

Projection-type image display device

Growing community of inventors

Oyamazaki, Japan

Hiroyuki Shinji