IMAGE PROJECTION DEVICE AND IMAGE PROJECTION SYSTEM

• Main Author: HOSOI NOBUHIRO
• Format: Patent
• Language: English; Japanese
• Published: 11.07.2016
• Subjects: ACCESSORIES THEREFOR; ADVERTISING; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICESUSING STATIC MEANS TO PRESENT VARIABLE INFORMATION; CALCULATING; CINEMATOGRAPHY; COMPUTING; COUNTING; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRIC DIGITAL DATA PROCESSING; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS

PROBLEM TO BE SOLVED: To enable prevention of reduction in a resolution feeling upon performing a pixel shift control by displacing an optical modulation element.SOLUTION: A projector 1 including: a light source 30; an image display unit 50 having a DMD551; an illumination optical system unit 40; and a projection optical system unit 60 comprises a movement control unit 12 that periodically displaces the DMD551 between a first state serving as a predetermined position and a second state displacing from the first state. As to a displacement period in which the DMD551 is displaced from the first state to the second state or from the second state to the first state, where a period of displacing between the first state and a first prescribed position from the first state is a displacement period A, a period of displacing between the second state and a second prescribed position from the second state is a displacement period C, and a period excluding the displacement period A and the displacement period C is a displacement period B, an image to be projected is blocked in the displacement period B.SELECTED DRAWING: Figure 2 【課題】光学変調素子自体を変位させてピクセルシフト制御をする際の解像感の低下を抑制することができる。【解決手段】光源３０と、ＤＭＤ５５１を有する画像表示ユニット５０と、照明光学系ユニット４０と、投影光学系ユニット６０と、を備えたプロジェクタ１において、ＤＭＤ５５１を既定位置である第１状態と、該第１状態から変位した第２状態との間で、周期的に変位させる移動制御部１２を備え、ＤＭＤ５５１が、第１状態から第２状態まで、または第２状態から第１状態まで変位する変位期間について、第１状態と、該第１状態から第１所定位置と、の間で変位する期間を変位期間Ａ、第２状態と、該第２状態から第２所定位置と、の間で変位する期間を変位期間Ｃ、変位期間ＡおよびＣを除く期間を変位期間Ｂとしたとき、変位期間Ｂでは、投影される画像を遮断する。【選択図】図２