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Researchers Submit Patent Application, "Cell for Light-Emitting Device and Light-Emitting Device", for Approval

June 5, 2014



By a News Reporter-Staff News Editor at Politics & Government Week -- From Washington, D.C., VerticalNews journalists report that a patent application by the inventors Asano, Hideki (Otsu-shi, JP); Wada, Masanori (Otsu-shi, JP), filed on May 24, 2012, was made available online on May 22, 2014.

The patent's assignee is Nippon Electric Glass Co., Ltd.

News editors obtained the following quote from the background information supplied by the inventors: "In recent years, as a white light source for use in, for example, a backlight of a liquid crystal display, a light source has been known in which an LED (light emitting diode) capable of emitting a blue light is combined with a light-emitting device capable of absorbing the blue light from the LED and emitting a yellow light (see, for example, Patent Literature 1). Emitted from such a white light source is a white light which is a synthesized light of the blue light emitted from the LED and then transmitted through the light-emitting device and the yellow light emitted from the light-emitting device."

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

"A possible light-emitting device capable of absorbing a blue light and emitting a yellow light is one in which a luminescent material, such as phosphor or quantum dot, is encapsulated in a cell.

"Recently, there are increasing demands to further increase the efficiency of light extraction from the light exit surface of the light-emitting device in order to further increase the brightness of the light source.

"The present invention has been made in view of the above point and an object thereof is to further increase the efficiency of light extraction from the light exit surface of the light-emitting device.

"Solution to Problem

"A cell for a light-emitting device of the present invention is a cell for a light-emitting device into which a luminescent substance is to be encapsulated. The cell for a light-emitting device of the present invention includes a first main wall, a second main wall, and a sidewall. The first main wall and the second main wall are disposed facing each other with a distance therebetween. The sidewall connects the first main wall and the second main wall. The sidewall defines, together with the first and second main walls, an internal space into which the luminescent substance is to be encapsulated. A portion of the sidewall located laterally of the internal space is white. A portion of the sidewall facing the internal space is preferably white. Furthermore, the entire sidewall is preferably white.

"The portion of the sidewall located laterally of the internal space preferably contains at least one of white glass and white ceramic. The term white glass herein includes white crystallized glass.

"The cell for a light-emitting device of the present invention may include: a first main wall member forming the first main wall; a second main wall member forming the second main wall; and a white sidewall member disposed between a peripheral portion of the first main wall member and a peripheral portion of the second main wall member, connecting the first main wall member and the second main wall member, and forming a portion of the sidewall.

"The cell for a light-emitting device of the present invention may include: a first main wall member forming the first main wall; a second main wall member forming the second main wall; and a white sidewall member disposed to surround the first and second main wall members, joined to end surfaces of the first and second main wall members, and forming the sidewall.

"A light-emitting device of the present invention includes: the cell for a light-emitting device of the present invention; and a luminescent substance encapsulated in the internal space of the cell for a light-emitting device. The luminescent substance is preferably formed of an inorganic phosphor. The inorganic phosphor is preferably formed of quantum dot.

"Advantageous Effects of Invention

"The present invention can further increase the efficiency of light extraction from the light exit surface of the light-emitting device.

BRIEF DESCRIPTION OF DRAWINGS

"[FIG. 1] FIG. 1 is a schematic perspective view of a light-emitting device according to a first embodiment.

"[FIG. 2] FIG. 2 is a schematic plan view of the light-emitting device according to the first embodiment.

"[FIG. 3] FIG. 3 is a schematic cross-sectional view taken along the line III-III in FIG. 2.

"[FIG. 4] FIG. 4 is a schematic cross-sectional view taken along the line IV-IV in FIG. 2.

"[FIG. 5] FIG. 5 is a schematic cross-sectional view of a light-emitting device according to a second embodiment."

For additional information on this patent application, see: Asano, Hideki; Wada, Masanori. Cell for Light-Emitting Device and Light-Emitting Device. Filed May 24, 2012 and posted May 22, 2014. Patent URL: http://appft.uspto.gov/netacgi/nph-Parser?Sect1=PTO2&Sect2=HITOFF&u=%2Fnetahtml%2FPTO%2Fsearch-adv.html&r=4145&p=83&f=G&l=50&d=PG01&S1=20140515.PD.&OS=PD/20140515&RS=PD/20140515

Keywords for this news article include: Quantum Dots, Nanotechnology, Emerging Technologies, Nippon Electric Glass Co. Ltd..

Our reports deliver fact-based news of research and discoveries from around the world. Copyright 2014, NewsRx LLC


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Source: Politics & Government Week


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