Citizen Electronics Co., Ltd.

Citizen Holdings Company, Ltd.

Citizen Watch Company, Ltd.

Other

Hitachi Chemical Company, Ltd.

Citizens Electronic Co., Ltd.

Junji Miyashita

Koichi Fukasawa

Kosuke Tsuchiya

Kiyokazu Watanabe

Kenji Matsumoto

Toshinobu Katsumata

Daisaku Okuwaki

Yasuaki Kayanuma

Takumi Miyashita

Hirohiko Ishii

Nodoka Oyamada

Takuya Funakubo

Mitsunori Ishizaka

Makoto Yasuhara

Teppei Takano

Tomoo Udagawa

Masakazu Koizumi

Shingo Mizuguchi

Tatsuji Hirano

Kousuke Tsuchiya

Takashi Shimura

Naoya Kashiwagi

Takuma Horiuchi

Yoshihiro Sho

Atsushi Kanemaru

Takashi Watanabe

Miharu Sugiura

Takahiro Shimizu

Koichi Hada

Kazuhiro Uwajima

A planar light unit is provided that suppresses appearance of a bright line when viewed from the side of the emission surface of the light guide plate. The planar light unit includes a light source, and a light guide plate including an incident surface for receiving light emitted from the light source, an emission surface from which the light introduced through the incident surface is emitted, an opposing surface disposed so as to oppose the emission surface, and a side surface disposed along an outer periphery of the emission surface and the opposing surface. The emission surface has a non-rectangular outer shape, and at least a part of the side surface is formed as a diffusing surface.

Planar light unit

To provide a planar light unit that optically and mechanically connects a light-emitting device and a light guide plate to each other in a stable manner so as to improve luminous efficiency and brightness uniformity on a light exit surface. A planar light unitincludes: a light guide plate, which includes a light incident portionon a side edge of the light guide plate; a light-emitting device, which is configured to emit light into an inside of the light guide platethrough the light incident portion; and a light source board, on which the light-emitting deviceis mounted. The light incident portionincludes a recessand a reflecting-shaped portion. A flexible resin, which has a light-transmitting property and a flexibility, is disposed between a light incident surface, which is formed on the recess, and the light-emitting device

A lens member includes a light-incident side; a light-exit side that is opposite to the light-incident side, a Fresnel lens arranged on a center axis that passes through a center of the light-incident side, and a diffraction grating structure arranged around a periphery of the Fresnel lens and having a center through which the center axis passes. Also, it is disclosed that the Fresnel lens may include a first Fresnel lens and a second Fresnel lens, the first Fresnel lens includes annular prisms that are divided from a convex lens and having a center through which the center axis of the light-incident side passes, and the second Fresnel lens includes annular prisms that are divided from a TIR lens and arranged around the periphery of the first Fresnel lens, centering around the center axis of the light-incident side.

Lens member and light-emitting device using same

A side edge planar lighting unit includes a light emitting diode, a light guide plate, and a transparent flexible resin between the light emitting diode and the light guide plate. The light emitting diode and the light guide plate are brought into close contact by the transparent flexible resin. The light guide plate includes a light exit face on a first main surface, a reflective face on a side opposite the light exit face, and a recessed portion in a first side edge. The recessed portion includes the light entrance face on a bottom surface, a pair of light entrance side faces facing each other across the light entrance face, and an anti-slip portion made of an uneven structure on at least one of the light entrance side faces. The transparent flexible resin is fitted in the recessed portion of the light guide plate.

Side edge planar lighting unit

In a first aspect of the present inventive subject matter, a lighting device includes a light source including a light-emitting surface, and a phosphor cover including a spiral surface that covers the light-emitting surface of the light source. In a second aspect of the present inventive subject matter, a phosphor cover including a spiral surface may include one or more layers. In a third aspect of the present inventive subject matter, a method manufacturing a lighting device includes: rolling up a phosphor film from one end to another end to form a roll with spiral surfaces both ends of the roll of the phosphor film.

Lighting device including phosphor cover and method of manufacturing the same

In a first aspect of the present inventive subject matter, a planar light guide device includes light-emitting elements arranged on a surface of a substrate to be an alignment on a center line between two long edges of the surface of the substrate; and a light-transmitting resin including a region in which optical elements are arranged at a first side and a second side of the light-transmitting resin, and the optical element includes a first surface and a second surface that is smaller in area than the first surface, and the first surface of the optical element is inclined with an angle that is in a range of one to 40 degrees with respect to a surface that is perpendicular to the mounting surface of the substrate with an edge of the surface in parallel with the center line between the two long edges of the surface of the substrate.

Planar lighting device

A light-emitting package allowing light to enter a thin lightguide plate efficiently has a package substrate, light-emitting elementsmounted on the package substrate, a transparent resin partsealing the light-emitting elements on the package substrate, a cut portionformed in the transparent resin part in parallel to the package substrate so as to be able to receive a side edge surface of a lightguide plate, and a reflecting layerformed on the entire surface of the transparent resin part except the cut portion.

Light emitting package, surface light-emitting device and display apparatus having the same

In a first aspect of the present inventive subject matter, a lighting device includes a substrate, a light-emitting element electrically mounted on the substrate, a frame member including a white-colored resin and surrounding the light-emitting element, and a light-transmitting resin in which the light-emitting element and the frame member are embedded. Also, it is suggested that the frame member further includes a light-shielding member entirely sealed by the white-colored resin.

Lighting device and method of manufacturing the same

In an aspect of the present invention, a light-emitting device includes a substrate; a first electrode and a second electrode arranged on an upper surface of the substrate with a gap between the first electrode and the second electrode, the gap being positioned at a central portion of the upper surface of the substrate; a first light-emitting diode element electrically mounted on the first electrode; and a second light-emitting diode element electrically mounted on the second electrode, wherein the first electrode includes a first inner portion and a first outer portion that are two equal area portions divided at a center line of the first electrode, and the first light-emitting diode element is mounted on the first outer portion of the first electrode, and wherein the second electrode includes a second inner portion and a second outer portion that are two equal area portions divided at a center line of the second electrode, and the second light-emitting diode element is mounted on the second outer portion of the second electrode.

Light-emitting device including light-emitting diode element that is mounted on outer portion of electrode

A light-emitting device is provided that aims not to affect a service life and characteristics of light emission and includes two electrodes formed on the upper surface of a substrate with a gap at a central portion of the upper surface of the substrate between the two electrodes, a first light-emitting diode element mounted on the first electrode, and a second light-emitting diode element mounted on the second electrode. The first light-emitting diode element includes a pair of element electrodes on an upper surface of the first light-emitting diode element and the second light-emitting diode element includes a pair of element electrodes on an upper surface of the second light-emitting diode element. The first light-emitting diode element is connected by a wire to the first electrode and/or the second electrode. The second light-emitting diode element is connected by a wire to the first electrode and/or the second electrode.

Light-emitting device

A lens member includes a central axis, a light-incident side including a Fresnel-lens surface provided with a plurality of annular prisms concentrically arranged with respect to the central axis, and a light-exit surface opposite to the light-incident side. The Fresnel-lens surface further includes an annular lens portion that is concentrically arranged with respect to the central axis and that is extended to be longer and wider than the plurality of annular prisms. Provided is an optical unit in which a light source and a lens member are combined, and parts are disposed in a space provided in an outer periphery of the annular lens portion.

Lens member and optical unit using said lens member

A layered substrate includes a first substrate including an upper surface, a lower surface, a peripheral surface between peripheral edges of the upper surface and the lower surface, and a cut portion cut into the peripheral surface and passing through the upper surface and the lower surface, and a second substrate including an upper surface, a lower surface, and a peripheral surface between peripheral edges of the upper surface and the lower surface, and the lower surface of the second substrate layered on the upper surface of the first substrate and closing the cut portion of the first substrate from above. The second substrate includes a heat conductor that is thermally connected to an element to be mounted on the upper surface of the second substrate, the heat conductor configured to thermally extend to the cut portion of the first substrate.

Layered substrate, light-emitting diode including the layered substrate and lighting device using the light-emitting diode

A planar light-emitting device includes a first reflecting surface, a rectangular support disposed adjacent to the first reflecting surface, light sources each including a light-emitting surface and disposed along, at least one side portion of the rectangular support, and a lens including a light-receiving surface disposed to face the light-emitting surfaces of the light sources, and configured to introduce light emitted from the light sources into a space that is demarcated by at least the first reflecting surface and the rectangular support.

Growing community of inventors

Fujiyoshida, Japan

Junji Miyashita