LIGHTING APPARATUS AND PROJECTION TYPE VIDEO DISPLAY DEVICE

• Main Author: YAMAMOTO NORIKAZU
• Format: Patent
• Language: English; Japanese
• Published: 07.05.2020
• Subjects: ACCESSORIES THEREFOR; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USINGWAVES OTHER THAN OPTICAL WAVES; APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FORPROJECTING OR VIEWING THEM; BLASTING; CINEMATOGRAPHY; ELECTROGRAPHY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; HOLOGRAPHY; LIGHTING; MECHANICAL ENGINEERING; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHOTOGRAPHY; PHYSICS; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

To selectively improve the spectral characteristic of a color component light by a simple configuration without requiring a major change to the constitution of an existing device.SOLUTION: A projection type video display device 1 comprises an LD 101, a separation element 220, a phosphor 233, and an optical system. The LD 101 generates a first color component light. The separation element partly transmits the first color component light at some instant, partly reflects the first color component light, and transmits a second color component light that is different from the first color component light. The phosphor 233 is excited by the first color component light transmitted through the separation element and generates a second color component light. The optical system synthesizes the first color component light having entered the separation element from the LD 101 and reflected by the separation element and the second color component light having entered the separation element from the phosphor 233 and transmitted through the separation element with each other. The separation element is constituted to have variable transmissivity and reflectivity with respect to the first color component light.SELECTED DRAWING: Figure 1 【課題】既存の装置の構成に対して大幅な変更を必要とすることなく、簡単な構成で、ある色成分光の分光特性を選択的に改善する。【解決手段】投写型映像表示装置１は、ＬＤ１０１、分離素子２２０、蛍光体２３３、及び光学系を備える。ＬＤ１０１は、第１の色成分光を発生する。分離素子は、ある瞬間において、第１の色成分光を部分的に透過し、第１の色成分光を部分的に反射し、かつ、第１の色成分光とは異なる第２の色成分光を透過する。蛍光体２３３は、分離素子を透過した第１の色成分光により励起されて第２の色成分光を発生する。光学系は、ＬＤ１０１から分離素子に入射して分離素子によって反射された第１の色成分光と、蛍光体２３３から分離素子に入射して分離素子を透過した第２の色成分光とを互いに合成する。分離素子は、第１の色成分光について可変な透過率及び反射率を有するように構成される。【選択図】図１