Patent Number: 7,086,739

Title: Projection display apparatus with capability of controlling whether to cool lamp depending on lamp temperature when restarting lamp

Abstract: A time management section is configured to change an output voltage in accordance with a temperature change characteristic of a lamp allowed to cool down. For restart of the lamp after the turn-off of the lamp, the lamp is cooled by a fan before the operation of turning on the lamp when it is judged that the temperature of the lamp is higher than a predetermined value, based on the output voltage from the time management section. The lamp is immediately turned on without the cooling of the lamp by the fan when it is judged that the temperature of the lamp is lower than the predetermined value.

Inventors: Kida; Hiroshi (Tokyo, JP), Kontani; Naoto (Tokyo, JP), Bessho; Tomohiro (Tokyo, JP), Kawaguchi; Mitsuhiro (Tokyo, JP)

Assignee: Mitsubishi Denki Kabushiki Kaisha

International Classification: G03B 21/16 (20060101); G03B 21/20 (20060101); H04N 5/74 (20060101)

Expiration Date: 8/08/02018