Active solid-state devices (e.g. – transistors – solid-state diode – Incoherent light emitter structure – In combination with or also constituting light responsive...
Reexamination Certificate
2002-07-22
2004-03-02
Fahmy, Wael (Department: 2814)
Active solid-state devices (e.g., transistors, solid-state diode
Incoherent light emitter structure
In combination with or also constituting light responsive...
C257S432000
Reexamination Certificate
active
06700137
ABSTRACT:
BACKGROUND OF THE INVENTION
The present invention relates to a light emitting diode device having a light emitting diode and provided for an electronic equipment, and more particularly to a light emitting diode device having a reflector.
FIG. 26
is a perspective view showing a conventional light emitting diode device, and
FIG. 27
is a sectional view of the light emitting diode device.
The light emitting diode device comprises a substrate
101
made of an epoxy resin, a cathode electrode pattern
102
and an anode electrode pattern
103
formed on the upper surface of the substrate
101
. These patterns
102
and
103
are connected to underside patterns
102
a
and
103
a
through leads
104
provided in through-holes.
A light emitting diode
105
is securely mounted on the cathode electrode pattern
102
. The light emitting diode
105
is connected to the anode electrode pattern
103
by a bonding wire
109
. A cylindrical reflector
106
is mounted on the substrate
101
surrounding the light emitting diode
105
. An inner reflecting wall
107
has an inverted truncated cone shape, so that the light
108
emitted from the light emitting diode
105
in horizontal directions is reflected in vertical directions.
The light emitting diode (LED)
105
, reflector
106
, and bonding wire
109
are sealed by a sealing member
110
made of a transmissive resin.
The sealing member
110
has a semispherical lens
110
b.
The semispherical lens
110
b
is provided for condensing the light
108
into light
108
b.
FIG. 28
is a perspective view showing another reflector, and
FIG. 29
is a sectional view of the reflector.
The reflector
116
has a semispherical reflecting wall
117
so as to parallely reflect the light emitted from the LED
105
in vertical direction.
Although the light emitting diode device illuminates a small area, the device can not light a large area. Therefore, the device can not be used as an edge light for irradiating a panel.
SUMMARY OF THE INVENTION
An object of the present invention is to provide a light emitting diode device which may irradiate a wide area.
According to the present invention, there is provided a light emitting diode device comprising a reflector member having an approximately semispherical recess, a reflector surface provided on an inner surface of the recess, a light emitting diode provided in the recess, and the light emitting diode being located at a position so that a part of light beams emitted from the light emitting diode recedes from an optical axis, and another part of the light beams approaches to the optical axis.
In an aspect of the present invention, the device comprises a substrate, and the reflector member being mounted on the substrate.
The reflector surface includes a first reflector surface about an X-axis and a second reflector surface about a Y-axis.
In another aspect, the first reflector surface and the second reflector surface are different in curvature.
The first and second reflector surfaces comprise same parabolas, both parabolas are disposed so as to be different in position of focus.
The reflector surface has a rectangular shape in plan view, and the reflector member comprises four reflector surfaces divided by a pair of diagonal lines.
These and other objects and features of the present invention will become more apparent from the following detailed description with reference to the accompanying drawings.
REFERENCES:
patent: 6459130 (2002-10-01), Arndt et al.
Horiuchi Megumi
Nakamura Shinobu
Citizen Electronic Co., Ltd.
Dennison Schultz Dougherty & MacDonald
Fahmy Wael
Trinh Hoa B.
LandOfFree
Light emitting diode device does not yet have a rating. At this time, there are no reviews or comments for this patent.
If you have personal experience with Light emitting diode device, we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Light emitting diode device will most certainly appreciate the feedback.
Profile ID: LFUS-PAI-O-3198975