Luminescent device - Toyoda Gosei Co., Ltd.

Title:

Luminescent device

Document Type and Number:

Japanese Patent JP6137494

Kind Code:

B2

Abstract:

PROBLEM TO BE SOLVED: To provide a light-emitting device capable of preventing only a light-emitting element of specific color from emitting light, when the power supply voltage varies, at a low cost.SOLUTION: A light-emitting device 10 includes light source blocks 12-14 constituted of series connections of two LEDs 12a, 13a, 14a having different working voltage, an on-vehicle battery 11 supplying a drive current for emitting light from the LEDs 12a, 13a, 14a by applying a drive voltage of the same voltage value to each light source block 12-14, and a power supply interruption circuit 16 for bringing all LEDs 12a, 13a, 14a into emission impossible state by entirely interrupting drive current supply from the on-vehicle battery 11 to each light source block 12-14, when the battery voltage (power supply voltage Vbat) of the on-vehicle battery 11 is less than a set voltage.

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Inventors:

Tetsuo Tabe

Application Number:

JP2014111025A

Publication Date:

May 31, 2017

Filing Date:

May 29, 2014

Export Citation:

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