Source: http://www.google.com/patents/US7534002?dq=6948823
Timestamp: 2017-06-23 23:50:10
Document Index: 796293803

Matched Legal Cases: ['art 6', 'art 6', 'art 6', 'art 6', 'art 9', 'art 9', 'art 100', 'art 97', 'art 9', 'art 6', 'art 6', 'art 6', 'art 8', 'art 8', 'art 6', 'art 6']

Patent US7534002 - Lighting device - Google PatentsSearch Images Maps Play YouTube News Gmail Drive More »Sign inPatentsA lighting device having: a light-emitting diode lamp having a light-emitting diode device sealed by a glass sealing part; and a fluorescent layer disposed on the side of an illuminated object of the light-emitting diode lamp. The fluorescent layer is operable to radiate a wavelength-converted light...http://www.google.com/patents/US7534002?utm_source=gb-gplus-sharePatent US7534002 - Lighting deviceAdvanced Patent SearchTry the new Google Patents, with machine-classified Google Scholar results, and Japanese and South Korean patents.Publication numberUS7534002 B2Publication typeGrantApplication numberUS 11/520,780Publication dateMay 19, 2009Filing dateSep 14, 2006Priority dateSep 15, 2005Fee statusPaidAlso published asUS20070058357Publication number11520780, 520780, US 7534002 B2, US 7534002B2, US-B2-7534002, US7534002 B2, US7534002B2InventorsSeiji Yamaguchi, Yoshinobu SuehiroOriginal AssigneeToyoda Gosei Co., Ltd.Export CitationBiBTeX, EndNote, RefManPatent Citations (16), Referenced by (98), Classifications (23), Legal Events (3) External Links: USPTO, USPTO Assignment, EspacenetLighting device
US 7534002 B2Abstract
A lighting device having: a light-emitting diode lamp having a light-emitting diode device sealed by a glass sealing part; and a fluorescent layer disposed on the side of an illuminated object of the light-emitting diode lamp. The fluorescent layer is operable to radiate a wavelength-converted light by being excited by light emitted from the light-emitting diode device.
Accordingly, it is an object of the invention to provide a lighting device that can prevent a phosphor (or a fluorescent layer) from decreasing in excitation efficiency and can prevent a sealing member (or a sealing part) from decreasing in transparency, and further can supply a high-brightness illuminating light over the long term.
Next, preferred embodiments according to the present invention will be explained in conjunction with the accompanying drawings.
Whole Composition of Lighting Device
The glass sealing part 6 has an optical shape surface 6A on the side of the illuminated object and the whole of the glass sealing part 6 is composed of a low-melting glass of SiO2—Nb2O5 system (refractive index n=1.8). A thermal expansion coefficient a of the glass sealing part 6 is set to be α=7×10−6/° C.
The device-mounting substrate 5 is composed of a nearly planar and square-shaped (lengthwise size: 1 mm, crosswise size: 1 mm) ceramic substrate (e.g., an Al2O3 substrate) having circuit patterns 5A, 5B on the front and back surfaces, respectively. A thermal expansion coefficient a of the device-mounting substrate 5 is set to be α=7×10−6/° C. As shown in FIG. 1C, the device-mounting substrate 5 has via holes 5C opening on both sides of the circuit patterns 5A, 5B (on front and back surfaces). In the via holes 5C, via patterns 5D made of tungsten (W) and connecting to the circuit patterns 5A, 5B are formed.
The light-emitting diode device 4 is formed with a standard size (lengthwise size: 0.3 mm, crosswise size; 0.3 mm). A thermal expansion coefficient of the ITO constituting the p-contact electrode 46 as a conductive oxide film is 7×10−6/° C., which is equal to that of the light-emitting diode device 4, so that the ITO is hard to cause electrode separation due to difference in thermal expansion coefficient therebetween. Further, the light-emitting diode device 4 is sealed by the glass sealing part 6 and is electrically connected to a device-mounting part of a circuit pattern 5A (as described later) of the device-mounting substrate 5 through stud bumps 7.
In FIG. 3, like components are indicated by using the same numerals as in FIGS. 1A and 1B and the detailed explanation is omitted.
In FIG. 4A and 4B, like components are indicated by using the same numerals as in FIG. 1B is and the detailed explanation is omitted.
In FIGS. 6A and 6B, like components are indicated by using the same numerals as in FIG. 1C and the detailed explanation is omitted.
In FIGS. 7A and 7B, like components are indicated by using the same numerals as in FIG. 1B and the detailed explanation is omitted.
In FIGS. 8A and 8B, like components are indicated by using the same numerals as in FIG. 1B and the detailed explanation is omitted.
In FIGS. 9A and 9B, like components are indicated by using the same numerals as in FIG. 1C and the detailed explanation is omitted.
In FIG. 10, like components are indicated by using the same numerals as in FIG. 9B and the detailed explanation is omitted.
In FIGS. 11A and 11B, like components are indicated by using the same numerals as in FIG. 1C and the detailed explanation is omitted.
As shown in FIG. 12A, a lighting device 1 of the tenth preferred embodiment has the features that the lighting device 1 comprises a lid part 9 made of an acrylic polymer containing a YAG phosphor, and a dichroic mirror 96 disposed on the lower surface of the lid part 9 on the side of the light-emitting diode lamp 2B to pass blue light therethrough and to reflect yellow light. Further, in the tenth preferred embodiment, the circuit patterns 5B of the light-emitting diode lamp 2B are connected to the circuit patterns 11B through a solder joint part 100.
As shown in FIG. 13, a lighting device 1 of the eleventh preferred embodiment has the features that the lighting device 1 comprises a light diffusion part 97 disposed on the surface of the lid part 9 on the side of the light-emitting diode lamp 2B, instead of the dichroic mirror 96 shown in the tenth preferred embodiment.
As shown in FIG. 14, a light-emitting diode lamp 2B of the twelfth preferred embodiment has the features that the light-emitting diode lamp 2B comprises the glass sealing part 6 that is shaped like a rectangular parallelepiped, and a silicone resin 20 that covers the glass sealing part 6, the device-mounting substrate 5, circuit patterns 11B etc. The silicone resin 20 has a refractive index of about n=1.4 and is formed such that, after mounting the light-emitting diode lamp 2B sealed by the glass sealing part 6 on the body part 8, a silicone resin material is coated thereon and is hardened while rendering the body part 8 upside down to be shaped like a convex lens.
As shown in FIG. 15, a light-emitting diode lamp 2B of the thirteenth preferred embodiment has the features that the light-emitting diode lamp 2B comprises the glass sealing part 6 that is shaped like a rectangular parallelepiped, a silicone resin 20 that covers the glass sealing part 6, the device-mounting substrate 5, circuit patterns 11B etc., and a light-diffusing powder 21 is disposed to cover the outer surface of the silicone resin 20. The silicone resin 20 has a refractive index of n=about 1.4. Each particle composing the light-diffusing powder 21 has a refractive index of about n=about 1.5.
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TOYODA GOSEI CO., LTD., JAPANFree format text: ASSIGNMENT OF ASSIGNORS INTEREST;ASSIGNORS:YAMAGUCHI, SEIJI;SUEHIRO, YOSHINOBU;REEL/FRAME:018571/0403Effective date: 20061012Sep 28, 2012FPAYFee paymentYear of fee payment: 4Nov 3, 2016FPAYFee paymentYear of fee payment: 8RotateOriginal ImageGoogle Home - Sitemap - USPTO Bulk Downloads - Privacy Policy - Terms of Service - About Google Patents - Send FeedbackData provided by IFI CLAIMS Patent Services