VIRTUAL IMAGE PROJECTION DEVICE AND HEAD-UP DISPLAY DEVICE

To reduce the amount of unbalance of a rotor and thereby realize low noise and high durability.SOLUTION: A virtual image projection device 100 comprises: a display element 31; a projection optical system 33; a rotor 35 including a diffusion surface 52a; a drive motor 39 for causing the rotor 35 to r...

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Bibliographic Details
Main Authors SAITO MITSUTAKA, MOTOME SHIGEO
Format Patent
LanguageEnglish
Japanese
Published 02.08.2021
Subjects
ARRANGEMENT OR MOUNTING OF PLURAL DIVERSE PRIME-MOVERS INVEHICLES
ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OFTRANSMISSIONS IN VEHICLES
ARRANGEMENTS IN CONNECTION WITH COOLING, AIR INTAKE, GASEXHAUST OR FUEL SUPPLY OF PROPULSION UNITS, IN VEHICLES
AUXILIARY DRIVES FOR VEHICLES
INSTRUMENTATION OR DASHBOARDS FOR VEHICLES
OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS
OPTICS
PERFORMING OPERATIONS
PHYSICS
TRANSPORTING
VEHICLES IN GENERAL
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Summary:To reduce the amount of unbalance of a rotor and thereby realize low noise and high durability.SOLUTION: A virtual image projection device 100 comprises: a display element 31; a projection optical system 33; a rotor 35 including a diffusion surface 52a; a drive motor 39 for causing the rotor 35 to rotate around a revolving axis; and a virtual image forming optical system 37 for converting an image on the irradiated diffusion surface 52a from the projection optical system 33 into a virtual image. The rotor 35 further includes a top cover 351 and a bottom cover 353 for covering a diffuser panel 352 and formed with a transparent material, the diffuser panel 352 being substantially circular when viewed from the direction of the revolving axis. When rotated around the revolving axis of the rotor 35, a plurality of diffusion surfaces 52a are sequentially arranged at different positions in the optical axis direction within the image forming range of the projection optical system, and the top cover 351 and the diffuser panel 352 are fitted to the drive motor 39.SELECTED DRAWING: Figure 3 【課題】回転体のアンバランス量を低減することで、ひいては低騒音、および高耐久性を実現できる。【解決手段】虚像投影装置１００は、表示素子３１と、投影光学系３３、拡散面５２ａを含む回転体３５、回転軸周りに回転体３５を回転させる駆動モーター３９、および投影光学系３３からの照射された拡散面５２ａ上の像を虚像に変換する虚像形成光学系３７とを備え、回転体３５は、拡散板３５２を覆う、透明な材料で形成された、トップカバー３５１、およびボトムカバー３５３を、さらに含み、拡散板３５２は、回転軸方向から視た場合に、略円形状であり、回転体３５の回転軸周りに回転させたときに、複数の拡散面５２ａは、投影光学系の結像範囲内において、前記光軸方向において異なる位置に順次配置され、トップカバー３５１、および拡散板３５２が、駆動モーター３９と嵌合する構成である。【選択図】図３
Bibliography:Application Number: JP20200002205