成果報告書詳細
管理番号20110000001476
タイトル*平成22年度中間年報 戦略的国際標準化推進事業 標準化研究開発(グリーンイノベーション推進事業) LED光源、並びにLED照明器具の性能評価方法の国際標準化に係る研究開発 (2)
公開日2011/12/13
報告書年度2010 - 2010
委託先名パナソニック電工株式会社
プロジェクト番号P04002
部署名電子・材料・ナノテクノロジー部
和文要約和文要約等以下本編抜粋:1. 研究開発の内容及び成果等
(1) 研究目標
LED光源およびLED照明器具は、次世代の省エネ光源・照明として、世界市場での急速な普及が予想されている。しかし、LEDは従来の照明光源と発光形態が大きく異なるため、従来の規格や定義、測定方法、照明方法等はそのまま適用できないことが多く、性能評価のための国際的な統一基準が存在していないことがLED照明の世界的な普及の阻害要因となっている。
LED 照明を次世代照明として健全に普及させるには、正しい性能評価の基準が必要であり、海外市場を開拓し国内のLED 照明産業を発展させるためには、我が国が先導して国際標準になり得る基盤技術を開発し、国際標準化を進める必要がある。
本研究は、国際標準化に向け、LED 照明器具の設計・評価に必要な測光と、LED 照明環境の評価に必要な測光の2つの基盤測光技術の開発を目標とする。
(2) 研究内容
(2.1) LED 照明の配光測定技術の開発
(2.1.1) 多受光方式配光測定装置による測定技術の開発
・JIS 原案と配光測定装置の比較による改造点明確化
(2.1.2) ミラー方式配光測定装置による測定技術の開発
・JIS 原案と配光測定装置の比較による改造点明確化
・配光測定装置を導入する暗室整備
・LED 照明器具の温度・光学特性の調査
(2.2) LED 照明環境における視作業効率測光技術の開発
・ベース測光装置の選定、及び 評価方法の検討
英文要約The Lighting Emitting Diodes(LEDs) are expected to be widely used as light sources in the near future because they have the potential to get general lightings to achieve higher energy efficiency. However, since LEDs have unique and different characteristics from the conventional light sources, the existing photometric measurement standards for general lighting cannot be applied directly to LED lighting products.
Therefore we are developing photometric measurement methods for LED lighting products. One of them is a measurement method for total luminous flux of LED luminaires. Another is a method that can achieve physical measurement of luminance based on the definition given in CIE 191, which recommends the system of mesopic photometry. Mesopic photometry is the key factor for evaluating the performance of LED road lighting luminaires or installations.
To develop a measurement method for total luminous flux of LED luminaires, we employed a multiple- photodetector type goniophotometer and a moving mirror type goniophotometer, which can measure luminous intensity distribution of luminaires. So far, for the multiple-photodetector type goniophotometer, we made clear necessary changes such as replacing detectors to high accuracy ones and change of measurement point of ambient temperature. For the moving mirror type goniophotometer, we constructed an air conditioned dark room and developed general supporting jigs that can fix diverse types of luminaires to the goniophotometer. We also measured stabilization time that LED luminaires reach temperature equilibrium by using thermo-viewer. We found that the stabilization time ranges 90-100 min.
Another goal is to develop a simple method so that mesopic measurements can be done. By reviewing CIE 191 and all empirical studies that CIE 191 is based on, we employed an imaging luminance meter that has 20 deg. view angle as a base system of a mesopic luminance meter. We also reviewed international and major national standards regarding road lighting evaluation. It became clear that both luminance and illuminance are employed as metrics to evaluate road lighting. Therefore an “m/p ratio meter”, which can measure mesopic/photopic ratio of adaptation field, should be useful to convert both luminance and illuminance measured by conventional instruments to mesopic quantities. Since the m/p ratio meter could cause significant error to measure chromatic scenes, we evaluated error of mesopic luminance in chromatic road lighting scene measured with the m/p ratio meter. The result showed that the error is small enough in usual road lighting scene.
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