SCANNING TYPE DISPLAY DEVICE AND SCANNING TYPE DISPLAY SYSTEM

• Main Author: IWASHINA SHINYA
• Format: Patent
• Language: English; Japanese
• Published: 12.09.2019
• 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

To provide a scanning type display device and a scanning type display system, capable of suppressing generation of uneven luminance in a displayed image.SOLUTION: A scanning type display device 1 comprises a light source 2 which emits a laser beam L1 for projection display, a light condensation unit 6 which condenses the laser beam L1 emitted from the light source 2, a light scanning unit 3 which scans the laser beam L1 passing through the light condensation unit 6, and a light diffusion unit 4 which includes a plurality of two-dimensionally arranged light diffusion channels 4a and diffuses the laser beam L1 scanned by the light scanning unit 3. A spot diameter of the laser beam L1 in a mirror 3a of the light scanning unit 3 is less than or equal to an effective opening diameter of the light scanning unit 3. When a wavelength of the laser beam L1 is λ, the effective opening diameter of the light scanning unit 3 is M, a distance from the light scanning unit 3 to the light diffusion unit 4 is L, and an arrangement pitch of the plurality of light diffusion channels 4a is P, the light diffusion unit 4 is configured so that the arrangement pitch becomes a value set on the basis of P≥(4λL)/(πM).SELECTED DRAWING: Figure 2 【課題】表示されたイメージに輝度むらが生じるのを抑制することができる走査型表示装置及び走査型表示システムを提供する。【解決手段】走査型表示装置１は、投影表示用のレーザ光Ｌ１を出射する光源２と、光源２から出射されたレーザ光Ｌ１を集光する集光部６と、集光部６を通過したレーザ光Ｌ１を走査する光走査部３と、二次元に配列された複数の光拡散チャネル４ａを有し、光走査部３によって走査されたレーザ光Ｌ１を拡散させる光拡散部４と、を備える。光走査部３のミラー３ａでのレーザ光Ｌ１のスポット径は、光走査部３の有効開口径以下である。レーザ光Ｌ１の波長をλとし、光走査部３の有効開口径をＭとし、光走査部３から光拡散部４までの距離をＬとし、複数の光拡散チャネル４ａの配列ピッチをＰとすると、光拡散部４は、配列ピッチがＰ≧（４λＬ）／（πＭ）に基づいて設定された値となるように、構成されている。【選択図】図２