亮度色溫可調光源及其用途

專利類型

發明

專利國別 (專利申請國家)

大陸

專利申請案號

201810542408.X

專利證號

4915147

專利獲證名稱

亮度色溫可調光源及其用途

專利所屬機關 (申請機關)

國立清華大學

獲證日期

2022/02/01

技術說明

習知技術主要是以多個高色溫發光元件與多個低色溫發光元件組成一個色溫可調照明裝置。然而，實務發現這樣的色溫可調照明裝置因爲具有多個不同色溫的發光元件而造成其製造的困難與成本的提高。另一方面，習知的色溫可調照明裝置的色溫調變範圍即由多個不同色溫的發光元件的可調變色溫範圍所决定，導致其色溫可調變化範圍因而受限。本發明主要提供一種亮度色溫可調光源，其僅由複數個高色溫的發光元件以及複數個光轉換單元所組成，其中，一部分的高色溫的發光元件的發光面係連接有一光轉換單元。根據本發明之設計，部分的光轉換單元僅包含一片光轉換膜，且部分的光轉換單元包含兩片或兩片以上相互堆疊的光轉換膜。如此設計，該複數個發光元件所發出的高色溫的色光會由不同的光轉換單元轉換成具有不同色溫與亮度(照度)的色光，藉此方式顯示出色溫與亮度皆可調之優勢。 Conventional technology commonly provides a CT tunable illumination apparatus by constituting a plurality of high color temperature (HCT) lighting devices and low color temperature (LCT) lighting elements. However, not only does the HCT and LCT lighting elements lead the CT tunable illumination apparatus to have a high manufacture cost and be difficult to be fabricated, but also cause that have a limited CT tunable range because the CT adjusting capability is relied on a CT tunable range of the two types of lighting elements. In view of that, the primary objective of the present invention is to provide a luminance and color temperature tunable light source comprising a plurality of HCT lighting elements and a plurality of light conversion units, wherein parts of the HCT lighting elements are connected with one light conversion unit by a light emission surface thereof. In the present invention, one part of the light conversion units comprises only one light conversion film and the other part of the light conversion units comprises two or more light conversion film stacked to each other. By such design, when the HCT lighting elements emit light, the light conversion unit would apply a light conversion process to the light, so as to change the color temperature and the luminance of the light. Therefore, the light source proposed by the present invention succeeds in exhibiting a brightness and color temperature individually-tunable function.

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