LIGHT-EMITTING MODULE AND DRIVING METHOD OF LIGHT-EMITTING DEVICE

To provide a driving method capable of reducing afterglow of a specific color caused by slow afterglow characteristics when driving a light-emitting device 40 for exciting two types of phosphors 52 having different afterglow characteristics by the same light-emitting element 60.SOLUTION: Provided is...

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Bibliographic Details
Main Authors YOSHINAGA SATOSHI, MORI KANA
Format Patent
LanguageEnglish
Japanese
Published 24.09.2020
Subjects
BASIC ELECTRIC ELEMENTS
BLASTING
ELECTRIC HEATING
ELECTRIC LIGHTING NOT OTHERWISE PROVIDED FOR
ELECTRIC SOLID STATE DEVICES NOT OTHERWISE PROVIDED FOR
ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
ELECTRICITY
FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMSTHEREOF
HEATING
LIGHTING
MECHANICAL ENGINEERING
NON-PORTABLE LIGHTING DEVICES
SEMICONDUCTOR DEVICES
STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHERARTICLES, NOT OTHERWISE PROVIDED FOR
SYSTEMS THEREOF
VEHICLE LIGHTING DEVICES SPECIALLY ADAPTED FOR VEHICLEEXTERIORS
WEAPONS
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Summary:To provide a driving method capable of reducing afterglow of a specific color caused by slow afterglow characteristics when driving a light-emitting device 40 for exciting two types of phosphors 52 having different afterglow characteristics by the same light-emitting element 60.SOLUTION: Provided is a driving method of a light-emitting device 40 including: a light-emitting element 60; and a light-emitting unit 50 including two or more types of phosphors 52 excited by the light-emitting element 60 and having different afterglow characteristics. An energization period 20 of the light-emitting device 40 includes: a maximum current supply period 21 for supplying the light-emitting element 60 with a maximum current I11 in the energization period 20; and a current reduction period 22 of continuously or step by step decreasing a current supplied to the light-emitting element 60 from the maximum current I11 next to the maximum current supply period 21.SELECTED DRAWING: Figure 3 【課題】異なる残光特性を有する２種類の蛍光体５２を、同一の発光素子６０で励起する発光装置４０を駆動する際に、残光特性が遅いことに起因する特定色の残光を低減できる駆動方法を提供する。【解決手段】発光素子６０と、前記発光素子６０によって励起される、残光特性の異なる２種類以上の蛍光体５２を含む発光部５０と、を含む発光装置４０の駆動方法であって、前記発光装置４０の通電期間２０が、前記発光素子６０に前記通電期間２０における最大電流Ｉ１１を供給する最大電流供給期間２１と、前記最大電流供給期間２１の次に、前記発光素子６０に供給する電流を、前記最大電流Ｉ１１から連続的に又は段階的に低下させる電流低下期間２２と、を含む、方法。【選択図】図３
Bibliography:Application Number: JP20200048315