Illumination device having elliptical body and display device using the same
First Claim
1. A display device, comprising:
- a non-self light emitting type display element; and
an illumination device for illuminating the display element, the illumination device comprisinga light source;
a light guide plate having a light emitting surface;
a light incident body having a first end portion that has a light incident surface on which light from the light source is incident, and an outer surface portion a part of which has an elliptical shape, the light guide plate and the light incident body being made of the same material; and
a coupling portion disposed between the light incident body and the light guide plate;
wherein opposed surface portions of the light guide plate and opposed elliptical surface portions of the light incident body are respectively coupled by opposed planar surface portions that define a wedge shape having a tapered thickness that decreases from the light incident body towards the light guide plate, the planar surface portions being tangential to respective elliptical surface portions of the light incident body.
3 Assignments
0 Petitions
Accused Products
Abstract
An illumination device for emitting light includes a light incident body having a first end portion that has a light incident surface on which light from a light source is incident, a second end portion, and an outer oval-shaped surface portion interconnection the first and second end portions. A light guide plate is optically coupled to the second end portion of the light incident body and has a light emitting surface through which light that propagates through the light incident body is emitted. The light guide plate and the light incident body are integrally formed and may comprise a one-piece body. A display device utilizes the illumination device for illuminating a display element of the non-self light emitting type.
37 Citations
16 Claims
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1. A display device, comprising:
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a non-self light emitting type display element; and
an illumination device for illuminating the display element, the illumination device comprisinga light source; a light guide plate having a light emitting surface; a light incident body having a first end portion that has a light incident surface on which light from the light source is incident, and an outer surface portion a part of which has an elliptical shape, the light guide plate and the light incident body being made of the same material; and a coupling portion disposed between the light incident body and the light guide plate; wherein opposed surface portions of the light guide plate and opposed elliptical surface portions of the light incident body are respectively coupled by opposed planar surface portions that define a wedge shape having a tapered thickness that decreases from the light incident body towards the light guide plate, the planar surface portions being tangential to respective elliptical surface portions of the light incident body.
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2. An illumination device for emitting light comprising:
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a light source; a light incident body having a first end portion that has a light incident surface on which light from the source is incident, a second end portion, and an outer surface portion interconnecting the first and second end portions and a part of which has an oval shape; and a light guide plate optically coupled to the second end portion of the light incident body and having a light emitting surface through which light that propagates through the light incident body is emitted, the light guide plate and the light incident body constituting a one-piece structure; wherein the second end portion of the light incident body has opposed planner surfaces that taper inwardly in a direction toward the light guide plate. - View Dependent Claims (3, 4, 5)
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6. An illumination device for emitting light comprising:
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a light source; a light guide plate having a light emitting surface; a light incident body having a first end portion that has a light incident surface on which light from the light source is incident, and an outer surface portion a part of which has an elliptical shape, the light guide plate and the light incident body being made of the same material; and a coupling portion disposed between the light incident body and the light guide plate; wherein opposed surface portions of the light guide plate and opposed elliptical surface portions of the light incident body are respectively coupled by opposed planar surface portions that define a wedge shape having a tapered thickness that decreases from the light incident body towards the light guide plate, the planar surface portions being tangential to respective elliptical surface portions of the light incident body. - View Dependent Claims (7, 8, 9, 10, 11, 12, 13)
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14. An illumination device for emitting light comprising:
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a light source; a light guide plate having a light emitting surface; a light incident body having a first end portion that has a light incident surface on which light from the light source is incident, and an outer surface portion a part of which has an oval shape; and a light reflector provided between the light incident body and the light source, the light reflector having an opening at a position corresponding to the light source; wherein the light guide plate is integrally coupled, without an intervening air space, to the light incident body, and the light incident body and the light guide plate are made of the same material. - View Dependent Claims (15, 16)
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Specification