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Researchers Submit Patent Application, "Light-Emitting Diode and Lighting Device Including the Same", for Approval

June 25, 2014



By a News Reporter-Staff News Editor at Electronics Newsweekly -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Tsuchiya, Kosuke (Yamanashi-ken, JP); Mizuno, Toshiyuki (Yamanashi-ken, JP), filed on February 18, 2013, was made available online on June 12, 2014.

The patent's assignee is Citizen Holdings Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "It is laid open to the public that a light emitting diode includes an element substrate, a light emitting element mounted on the element substrate, a sealing body which emits light from the light emitting element and which seals the light emitting element, and a light shielding means to form light emitting parts for directing light from the sealing body in two dimensional directions which are formed from a combination of either two axes of three dimensional axes X, Y and Z (For reference, see Japanese Unexamined Patent Application Publication No. 2004-127604).

"Also, it is laid open to the public that a light emitting device provided with a light emitting device chip, a transparent member coating the light emitting device chip, and a reflecting member covering the surface of transparent member except surfaces from which light from the light emitting device chip is emitted. The device is formed so that the surface of the transparent member is exposed 180 [deg.] or more in an angle when it is seen from the light emitting device chip in at least one plane passing the light emitting device chip (For reference, see Japanese Unexamined Patent Application Publication No. 2004-03977778)."

As a supplement to the background information on this patent application, VerticalNews correspondents also obtained the inventors' summary information for this patent application: "Technical Problem

"In a light-emitting diode and/or a lighting device, varied light from a light-emitting element and from a phosphor included in a light-transmitting member tends to occur, depending on a direction of emitted light. Also, in a light-emitting diode and/or a lighting device with a configuration to emit a wide angle of light emission, light leak in another direction that is unnecessary is required to be prevented.

"Solution to Problem

"In a first aspect of the present invention, a light-emitting diode includes a light-emitting element with a p-n junction, a first light-transmitting member including a phosphor and sealing the light-emitting element, and first and second covers disposed on opposite surfaces of the first light-transmitting member. It is disclosed that the first and second covers extend over edges of the opposite surfaces of the first light-transmitting member.

"In a second aspect of the present invention, a first cover disposed on a first parallel surface of a first light-transmitting member can be greater in thickness than a second cover.

"In some embodiments, it is disclosed that a second light-transmitting member with higher diffusion coefficient than a first light-transmitting member disposed in contact with a first perpendicular surface of a first light-transmitting member. It is also disclosed that the second light-transmitting member with higher diffusion coefficient than the first light-transmitting member further disposed in contact with a second perpendicular surface of the first light-transmitting member.

"It is disclosed that a distance between the p-n junction and the first perpendicular surface of the first light-transmitting member is substantially identical to a distance between the p-n junction and the third perpendicular surface of the first light-transmitting member. It is also disclosed that a distance between the p-n junction and the second perpendicular surface of the first light-transmitting member is substantially identical to the distance between the p-n junction and the third perpendicular surface of the first light-transmitting member.

"Furthermore, it is disclosed that the distance between the p-n junction and the first perpendicular surface of the first light-transmitting member is less than the distance between the p-n junction and the third perpendicular surface of the first light-transmitting member. It is also disclosed that the distance between the p-n junction and the second perpendicular surface of the first light-transmitting member is less than the distance between the p-n junction and the third perpendicular surface of the first light-transmitting member.

"Advantageous Effects of Invention

"An occurrence of varied light from a light-emitting element and from a phosphor included in the light-transmitting member depending on a direction of emitted light can be suppressed. Also, a light-emitting diode and/or a lighting device that is configured to emit light with a wide angle of light emission are suggested.

BRIEF DESCRIPTION OF DRAWINGS

"FIG. 1 is a top perspective view of a light-emitting diode (LED) according to a first embodiment of the present invention.

"FIG. 2 is a front view of the LED shown in FIG. 1 and mounted on a motherboard of a lighting device.

"FIG. 3 is a cross-sectional view of the LED taken along the line III-III of FIG. 2.

"FIG. 4 is a cross-sectional view of an LED according to a second embodiment of the present invention.

"FIG. 5 is a cross-sectional view of an LED according to a third embodiment of the present invention.

"FIG. 6 is a top perspective view of an LED according to a fourth embodiment of the present invention.

"FIG. 7 is a front view of the LED shown in FIG. 6 and mounted on a motherboard of a lighting device.

"FIG. 8 is a top perspective view of an LED according to a fifth embodiment of an LED of the present invention.

"FIG. 9 is a front view of the LED shown in FIG. 8 and mounted on a motherboard of a lighting device."

For additional information on this patent application, see: Tsuchiya, Kosuke; Mizuno, Toshiyuki. Light-Emitting Diode and Lighting Device Including the Same. Filed February 18, 2013 and posted June 12, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=5300&p=106&f=G&l=50&d=PG01&S1=20140605.PD.&OS=PD/20140605&RS=PD/20140605

Keywords for this news article include: Electronics, Light-emitting Diode, Citizen Holdings Co. Ltd..

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Source: Electronics Newsweekly


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