LED device and portable telephone, digital camera and LCD apparatus using the same

A LED device and device technology, applied in the direction of electric solid-state devices, semiconductor devices, chemical instruments and methods, etc., can solve the problems of narrow peak emission width, difficulty in obtaining bright white light with color reproduction characteristics, etc.
CN1542990AInactive Publication Date: 2004-11-03SHARP KK
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
SHARP KK
Publication Date
2004-11-03
Estimated Expiration
Not applicable · inactive patent

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Abstract

An LED device at least including a blue light emitting element having peak emission wavelength of 420 nm to 480 nm, a green fluorescent substance having peak wavelength of fluorescent spectrum in the range of 500 nm to 580 nm with the emission of the blue light emitting element, and a red light emitting element having peak emission wavelength of 600 nm to 670 nm is provided. The device may further include an ultraviolet / violet light emitting element for exciting green fluorescent substance. As a result, an LED device capable of attaining bright white light with good color reproduction characteristic is provided.
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Description

[0001] This non-provisional application is based on Japanese Patent Application No. 2003-115987 filed with the Japan Patent Office on April 21, 2003, the entire contents of which are hereby incorporated by reference. technical field

[0002] The present invention relates to an LED (Light Emitting Diode) device, which is used as an auxiliary light source for a CCD (Charge Coupled Device) or CMOS (Complementary Metal Oxide Semiconductor) camera, or as a backlight source for an LCD (Liquid Crystal Display) . More particularly, the present invention relates to an LED device having excellent color reproduction characteristics and emitting bright white light, the device including a combination of a light emitting element and a fluorescent substance excited by the light emitting element. Background technique

[0003] As a conventional white light-emitting device using an LED, there is known a white LED device (see, for example, Japanese Patent Laid-Open No. 2002-064220) which inclu...

Claims

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