TRAPEZOIDAL DISTORTION CORRECTION MECHANISM, PROJECTION OPTICAL DEVICE AND IMAGE PROJECTION DEVICE

• Main Authors: MIKUTSU YASUNARI, NISHI YUKIMI, HIRAMATSU TAKAHIRO, TSUCHIYA SATOSHI
• Format: Patent
• Language: English; Japanese
• Published: 28.12.2017
• 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 provide a trapezoidal distortion correction mechanism capable of preventing a size increase of an image projection device and also to provide an image projection device.SOLUTION: A trapezoidal distortion correction mechanism 70 includes: a supporting point part 74 abutting on one end in a longer direction of a folding mirror 602 such as a reflection mirror; an elastic member being energization means abutting on an end in the longer direction of the folding mirror 602; and a push-in device 72 arranged at the other end in the longer direction of the folding mirror 602 and being moving means including a push-in member 72a arranged in a movable manner in an arrow D direction and a drive unit 72b configured to move the push-in member 72a to an elastic member side.SELECTED DRAWING: Figure 5 【課題】画像投写装置の大型化を抑制することができる台形歪み補正機構および画像投写装置を提供する。【解決手段】台形歪み補正機構７０は、反射ミラーなどの折り返しミラー６０２の長手方向一端に当接する支点部７４と、折り返しミラー６０２の長手方向端に当接する付勢手段たる弾性部材と、折り返しミラー６０２の長手方向他端に設けられ、図中矢印Ｄ方向に移動可能に設けられた押し込み部材７２ａおよび押し込み部材７２ａを弾性部材側に移動させる駆動装置７２ｂからなる移動手段たる押し込み装置７２とを備えている。【選択図】図５