IMAGE PROJECTION DEVICE, CONTROL METHOD, AND PROGRAM

• Main Authors: ISHIKAWA NAOYUKI, MIKUTSU YASUNARI, FUJIOKA TETSUYA, YAMADA MASAMICHI, NISHI YUKIMI, KANAI HIDEO, MIKAWA AKIHISA, TSUCHIYA SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 09.03.2017
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION

PROBLEM TO BE SOLVED: To prevent, when light emitted from a projection optical system is shielded by a shield, an increase in temperature of the shield and appropriately prevent an increase in temperature inside the device.SOLUTION: An image projection device comprises: a housing; a light source that is provided inside the housing; projection means that projects light from the light source; cooling means that cools the inside of the housing; detection means that detects a shield that shields light projected from the projection means; and control means that controls, when the shield is detected by the detection means, the intensity of light projected from the projection means and controls the output from the cooling means.SELECTED DRAWING: Figure 12 【課題】投射光学系から射出する光を遮蔽物で遮蔽した際、遮蔽物の温度上昇を防止するとともに、装置内の温度上昇を適切に防止する。【解決手段】筐体と、筐体内に設けられた光源と、光源からの光を投射する投射手段と、筐体内を冷却する冷却手段と、投射手段から投射される光を遮る遮蔽物を検出する検出手段と、検出手段により遮蔽物が検出されたとき、投射手段から投射させる光量を制御するとともに、冷却手段の出力制御を行う制御手段と、を備える。【選択図】図１２