WAVELENGTH CONTROL FILTER, AND LIGHT EMITTING DEVICE AND ILLUMINATION DEVICE HAVING THE SAME

• Main Authors: YAMAUCHI SATORU, TSUBAKINO YURIKA, WADA HIDEKI, DOI SACHIKO
• Format: Patent
• Language: English; Japanese
• Published: 23.09.2016
• Subjects: BASIC ELECTRIC ELEMENTS; BLASTING; ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR; ELECTRICITY; FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF; HEATING; LIGHTING; MECHANICAL ENGINEERING; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; WEAPONS

PROBLEM TO BE SOLVED: To provide a wavelength control filter with high color rendering capability and light resistance for use with light emitting devices.SOLUTION: A wavelength control filter 1 consists of a base material 31 made of a translucent resin, and a pigment 32 for controlling wavelength of light added to the base material 31, and comprises a plurality of types of resin layers 3A, 3B with different concentration of the pigment 32 with respect to the base material 31. With such a configuration, the resin layer 3A containing the pigment 32 provides high color rendering property, and forming the resin layers 3B containing no pigment 32 to increase the thickness of the entire wavelength control filter 1 while making the pigment concentration of the resin layer 3A relatively higher minimizes reduction in wavelength controlling capability of the pigment 32 and increases light resistance.SELECTED DRAWING: Figure 4 【課題】発光装置に用いられる波長制御フィルタにおいて、高い演色性を得ることができ、しかも耐光性を高くする。【解決手段】波長制御フィルタ１は、透光性樹脂から成る母材３１と、母材３１に添加されて光の波長を制御する色素３２と、を有し、母材３１に対する色素３２の濃度が異なる複数種類の樹脂層３Ａ，３Ｂが積層されている。この構成によれば、色素３２を含有する樹脂層３Ａにより、高い演色性を得ることができ、また、樹脂層３Ａの色素濃度を相対的に高くする一方で、色素３２を含まない樹脂層３Ｂにより波長制御フィルタ１全体の厚みを持たせることで、色素３２の波長制御機能の低下を抑制し、耐光性を高めることができる。【選択図】図４