IMAGE PROJECTION DEVICE

• Main Author: NOSE MASAKI
• Format: Patent
• Language: English; Japanese
• Published: 26.04.2018
• 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; CINEMATOGRAPHY; CRYPTOGRAPHY; DISPLAY; EDUCATION; ELECTRIC COMMUNICATION TECHNIQUE; ELECTRICITY; ELECTROGRAPHY; HOLOGRAPHY; PHOTOGRAPHY; PHYSICS; PICTORIAL COMMUNICATION, e.g. TELEVISION; SEALS

PROBLEM TO BE SOLVED: To provide an image projection device capable of projecting a video signal having an appropriate high dynamic range corresponding to a use state.SOLUTION: In an image projection device 100, on the basis of the luminance of a projection image projected onto a screen C (projection face) measured by a luminance sensor 20 (luminance measuring means), an HDR switching unit 12 (selection means) selects any one of a real HDR conversion unit 13a and a pseudo HDR conversion unit 13b, which are video conversion means. Then, a video projection unit 14 (projection means) converts an original video signal into an HDR video signal with a luminance range expanded by the selected video conversion means, and projects it to a screen.SELECTED DRAWING: Figure 2 【課題】使用状況に応じて、適切なハイダイナミックレンジを有する映像信号を投影することができる画像投影装置を提供する。【解決手段】画像投影装置１００は、輝度センサ２０（輝度測定手段）が測定した、スクリーンＣ（投影面）に投影された投影像の輝度に基づいて、ＨＤＲ切換部１２（選択手段）が、映像変換手段であるリアルＨＤＲ変換部１３ａと擬似ＨＤＲ変換部１３ｂとのうちのいずれか１つを選択する。そして、映像投影部１４（投影手段）が、選択された映像変換手段によって、原映像信号を、輝度レンジを拡大したＨＤＲ映像信号に変換してスクリーンに投影する。【選択図】図２