OPTICAL WAVELENGTH-CONVERTING DEVICE AND ILLUMINATION SYSTEM USING THE SAME

• Main Authors: CHEN JAU-SHIU, CHOU YEN I, CHANG KEUK-SU, CHEN CHI
• Format: Patent
• Language: English; Japanese
• Published: 16.05.2016
• 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; NON-PORTABLE LIGHTING DEVICES; OPTICAL ELEMENTS, SYSTEMS, OR APPARATUS; OPTICS; PHYSICS; SEMICONDUCTOR DEVICES; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR; SYSTEMS THEREOF; VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS; WEAPONS

PROBLEM TO BE SOLVED: To solve such the problem that the reflective layer designed for a phosphor wheel cannot satisfy high reflection rate requirements covering all visible light spectra (400 nm to 700 nm) and the regimes (±0 to 90 degrees) of all angles of incidence (AOI).SOLUTION: An optical wavelength-converting device used for converting first waveband light includes a substrate, a phosphor layer and a composite reflection layer. The phosphor layer is disposed on the substrate, and converts the first waveband light into second waveband light. As a result, output efficiency of wide-angle and wide-spectrum light is increased. The composite reflection layer includes a first reflection layer and a second reflection layer. The first reflection layer is disposed between the substrate and the phosphor layer and adjacent to the substrate for reflecting the second waveband light so that the second waveband light is output through the phosphor layer. The second reflection layer is disposed between the first reflection layer and the phosphor layer, and adjusts the reflection spectrum of the first reflection layer, thereby enhancing the reflection rate of the composite reflection layer.SELECTED DRAWING: Figure 5 【課題】蛍光ホイール用に設計された反射層は、すべての可視光スペクトラム（４００ｎｍ〜７００ｎｍ）と全ての入射角（ＡＯＩ）の状態（±０度〜９０度）をカバーする高い反射率要件を満たすことができない。【解決手段】第１波長帯の光を変換するために用いられる光波長変換デバイスは、基板と蛍光体層と複合反射層とを有する。蛍光体層は、基板上にあり、第１波長帯の光を第２波長帯の光に変換する。結果として、広角且つ広いスペクトラムの光の出力効率が増加する。複合反射層は、第１反射層と第２反射層とを有する。第２波長帯の光が蛍光体層を介して出力されるように第１反射層は、基板と蛍光体層との間に配置され且つ基板に隣接し、第２波長帯の光を反射する。第２反射層は、第１反射層と蛍光体層との間に配置され、第１反射層の反射スペクトルを調節し、これによって複合反射層の反射率が上昇する。【選択図】図５