ILLUMINATION UNIT, OPTICAL ENGINE, AND IMAGE PROJECTION DEVICE

• Main Authors: MASHITA ATSUSHI, FUJIOKA TETSUYA, MIKUTSU YASUNARI, SAITO YOSHITO, NISHI YUKIMI, NISHIMORI TAKEHIRO, KANAI HIDEO, HIRAMATSU TAKAHIRO, TSUCHIYA SATOSHI, MIKAWA AKIHISA
• 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; BLASTING; CINEMATOGRAPHY; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HEATING; HOLOGRAPHY; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To provide an illumination unit that can suppress an error in position of a group of optical elements with respect to an image creation element.SOLUTION: An illumination unit 20 comprises: a group of optical elements 22 to 25 that form a light path for guiding light from a light source to a DMD; and an illumination bracket 26 that holds the group of optical elements 22 to 25. A cylinder mirror 24, of the group of optical elements 22 to 25, is supported by support parts 262 to 264 formed integrally with the illumination bracket 26 and held by the illumination bracket 26. A concave mirror 25, of the group of optical elements 22 to 25, is supported by support parts 264 to 266 formed integrally with the illumination bracket 26 and held by the illumination bracket 26.SELECTED DRAWING: Figure 5A 【課題】画像生成素子に対する光学素子群の位置誤差を抑えることができる照明ユニットを提供する。【解決手段】照明ユニット２０は、光源からの光をＤＭＤに導く光路を形成する光学素子群２２〜２５と、光学素子群２２〜２５を保持する照明ブラケット２６とを備える。光学素子群２２〜２５のうちシリンダミラー２４は、照明ブラケット２６に一体成形された支持部２６２〜２６４に支持されて照明ブラケット２６に保持されている。また光学素子群２２〜２５のうち凹面ミラー２５は、照明ブラケット２６に一体成形された支持部２６４〜２６６に支持されて照明ブラケット２６に保持されている。【選択図】図５Ａ