To provide a display device, an illumination device and a reflector capable of emitting light in a plurality of wavelength regions while reducing or varying a difference in the intensity of light.SOLUTION: A display device 10 includes an image forming apparatus 30 emitting image light Li, and a polarization selective reflection layer 70 reflecting the image light Li to vary optical paths of the image light Li. The polarization selective reflection layer 70 has a first cholesteric liquid crystal structure layer 71 having a first wavelength as a selective reflection center wavelength, and a second cholesteric liquid crystal structure layer 72 having a second wavelength different from the first wavelength as a selective reflection center wavelength. The intensity of light L1 in a first wavelength region including the first wavelength, included in the image light Li emitted from the image forming apparatus 30, is lower than the intensity of light L2 in a second wavelength region including the second wavelength, included in the image light Li emitted from the image forming apparatus 30. The first cholesteric liquid crystal structure layer 71 is located on a side of the second cholesteric liquid crystal structure layer 72, the side where the image light Li emitted from the image forming apparatus 30 to propagate to the polarization selective reflection layer 70 is incident.SELECTED DRAWING: Figure 2
【課題】複数の波長域の光を、その強度差を緩和あるいは変更して射出可能な表示装置、照明装置、反射板を提供する。【解決手段】画像光Liを射出する画像形成装置30と、画像光Liを反射して画像光Liの光路を変化させる偏光選択反射層70と、を備え、偏光選択反射層70は、第1波長を選択反射中心波長とする第1コレステリック液晶構造層71と、第1波長とは異なる第2波長を選択反射中心波長とする第2コレステリック液晶構造層72と、を有し、画像形成装置30から射出した画像光Liに含まれる第1波長を含む第1波長域の光L1の強度は、画像形成装置30から射出した画像光Liに含まれる第2波長を含む第2波長域の光L2の強度よりも、弱く、第1コレステリック液晶構造層71は、第2コレステリック液晶構造層72よりも、画像形成装置30から射出して偏光選択反射層70に向かう画像光Liの入射側に位置する、表示装置10。【選択図】図2
DISPLAY DEVICE, MOBILE BODY, ILLUMINATION DEVICE AND REFLECTOR
表示装置、移動体、照明装置および反射板
2019-08-08
Patent
Electronic Resource
Japanese
IPC: | G02F DEVICES OR ARRANGEMENTS, THE OPTICAL OPERATION OF WHICH IS MODIFIED BY CHANGING THE OPTICAL PROPERTIES OF THE MEDIUM OF THE DEVICES OR ARRANGEMENTS FOR THE CONTROL OF THE INTENSITY, COLOUR, PHASE, POLARISATION OR DIRECTION OF LIGHT, e.g. SWITCHING,... , Vorrichtungen oder Anordnungen, deren optische Arbeitsweise durch Änderung der optischen Eigenschaften des Mediums der Vorrichtungen oder Anordnungen geändert wird zum Steuern der Intensität, Farbe, Phase, Polarisation oder der Richtung von... / B60K Anordnung oder Einbau von Antriebseinheiten oder von Kraft- bzw. Drehmomentübertragungen in Fahrzeugen , ARRANGEMENT OR MOUNTING OF PROPULSION UNITS OR OF TRANSMISSIONS IN VEHICLES / F21S Ortsfeste Leuchten , NON-PORTABLE LIGHTING DEVICES / F21V FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF , Funktionsmerkmale oder Einzelheiten von Leuchten oder Beleuchtungssystemen / G02B Optische Elemente, Systeme oder Geräte , OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS |
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