Light source unit and projector with light source apparatus

Abstract

A light source unit includes a light emitting element, a substrate on which the light emitting surface is disposed, a sealing portion which transmits light from the light emitting surface and a collimator lens for forming light emitted from the sealing portion into a bundle of parallel rays of light, and the sealing portion has two or more convexly curved surfaces which project in a direction in which light is emitted therefrom.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[FIG. 1] A sectional view of a sealing portion of an embodiment of the invention.

[FIG. 2] A sectional view of a light source unit of the embodiment of the invention.

[FIG. 3] A perspective view of a light source apparatus of the embodiment of the invention.

[FIG. 4] A sectional view of a sealing portion of another embodiment of the invention.

[FIG. 5] A sectional view of a light source unit of the embodiment of the invention.

[FIG. 6] A perspective view of a light source apparatus of the embodiment of the invention.

[FIG. 7] A sectional view of a sealing portion of a further embodiment of the invention.

[FIG. 8] A sectional view of a light source unit of the further embodiment of the invention.

[FIG. 9] A perspective view of a light source apparatus of the further embodiment of the invention.

[FIG. 10] A perspective view of a projector of an embodiment of the invention.

[FIG. 11] An explanatory view of an interior of the projector of the embodiment of the invention.

Claims

1. A light source unit comprising: a light emitting element;a substrate on which the light emitting element is disposed;a sealing portion which transmits light of the light emitting element; anda collimator lens for forming light emitted from the sealing portion into a bundle of parallel rays of light for emission therefrom,wherein the sealing portion has two or more convexly curved surfaces which project in a direction in which light is emitted therefrom.

2. The light source unit according to claim 1, wherein the sealing portion is formed into the shape of a body of revolution.

3. The light source unit according to claim 1, wherein the sealing portion comprises a doom-shaped sealing material and a lens cap, and wherein the lens cap is formed into the shape of a body of revolution having two or more convexly curved surfaces which project in a direction in which light is emitted therefrom, has an opening portion for accommodating therein the sealing material in a bottom portion thereof, and is bonded to the sealing material at the opening portion thereof.

4. The light source unit according to claim 1, wherein the collimator lens is formed into an inverted truncated cone shape, and wherein a light emitting surface of the collimator lens is made up of a flat surface portion which is formed at a center thereof in such a manner as to be parallel to a bottom surface of the collimator lens and an inclined surface formed around a perimeter of the flat surface portion, whereby the collimator lens is made to have an inverted truncated cone-shaped top portion which is recessed at a center thereof.

5. The light source unit according to claim 1, wherein the collimator lens is formed into an inverted truncated cone shape, and wherein a light emitting surface of the collimator lens has a central inclined surface of a cone shape which is made to project at a center thereof and a side inclined surface which constitutes an inclined surface which is inclined from a perimeter of a bottom portion of the central inclined surface towards a perimeter of the collimator lens.

6. The light source unit according to claim 1, wherein the collimator lens is formed into an inverted truncated hexagonal pyramid shape, and wherein a light emitting surface thereof is made up of a flat surface portion which is formed at a center thereof in such a manner as to be parallel to a bottom surface of the collimator lens and an inclined surface formed around a perimeter of the flat surface portion, whereby the collimator lens is made to have an inverted truncated hexagonal cone-shaped top portion which is recessed at a center thereof.

7. A light source apparatus comprising: a plurality of light source units which are disposed adjacent to each other;the plurality of light source units each comprising a light emitting element, a substrate on which the light emitting element is disposed, a sealing portion which transmits light of the light emitting element and a collimator lens which forms light emitted from the sealing portion into a bundle of parallel rays of light for emission therefrom,wherein the sealing portions each have two or more convexly curved surfaces which project in a direction in which light is emitted therefrom.

8. The light source apparatus according to claim 7, wherein the sealing portion is formed into the shape of a body of revolution.

9. The light source apparatus according to claim 7, wherein the sealing portion comprises a doom-shaped sealing material and a lens cap, and wherein the lens cap is formed into the shape of a body of revolution having two or more convexly curved surfaces which project in a direction in which light is emitted therefrom, has an opening portion for accommodating therein the sealing material in a bottom portion thereof, and is bonded to the sealing material at the opening portion thereof.

10. The light source apparatus according to claim 7, wherein the collimator lens is formed into an inverted truncated cone shape, and wherein a light emitting surface of the collimator lens is made up of a flat surface portion which is formed at a center thereof in such a manner as to be parallel to a bottom surface of the collimator lens and an inclined surface formed around a perimeter of the flat surface portion, whereby the collimator lens is made to have an inverted truncated cone-shaped top portion which is recessed at a center thereof.

11. The light source apparatus according to claim 7, wherein the collimator lens is formed into an inverted truncated cone shape, and wherein a light emitting surface of the collimator lens has a central inclined surface of a cone shape which is made to project at a center thereof and a side inclined surface which constitutes an inclined surface which is inclined from a perimeter of a bottom portion of the central inclined surface towards a perimeter of the collimator lens.

12. The light source apparatus according to claim 7, wherein the collimator lens is formed into an inverted truncated hexagonal pyramid shape, and wherein a light emitting surface thereof is made up of a flat surface portion which is formed at a center thereof in such a manner as to be parallel to a bottom surface of the collimator lens and an inclined surface formed around a perimeter of the flat surface portion, whereby the collimator lens is made to have an inverted truncated hexagonal cone-shaped top portion which is recessed at a center thereof.

13. A projector comprising: a light source apparatus;a light source side optical system;a display device for generating a projection image;a projection side optical system for projecting the projection image so generated; anda projector control unit,the light source apparatus comprising a plurality of light source units which are disposed adjacent to each other, the plurality of light source units each comprising a light emitting element, a substrate on which the light emitting element is disposed, a sealing portion which transmits light of the light emitting element and a collimator lens which forms light emitted from the sealing portion into a bundle of parallel rays of light for emission,wherein the sealing portions each have two or more convexly curved surfaces which project in a direction in which light is emitted therefrom.

14. The projector according to claim 13, wherein the sealing portion is formed into the shape of a body of revolution.

15. The projector according to claim 13, wherein the sealing portion comprises a doom-shaped sealing material and a lens cap, and wherein the lens cap is formed into the shape of a body of revolution having two or more convexly curved surfaces which project in a direction in which light is emitted therefrom, has an opening portion for accommodating therein the sealing material in a bottom portion thereof, and is bonded to the sealing material at the opening portion thereof.

16. The projector according to claim 13, wherein the collimator lens is formed into an inverted truncated cone shape, and wherein a light emitting surface of the collimator lens is made up of a flat surface portion which is formed at a center thereof in such a manner as to be parallel to a bottom surface of the collimator lens and an inclined surface formed around a perimeter of the flat surface portion, whereby the collimator lens is made to have an inverted truncated cone-shaped top portion which is recessed at a center thereof.

17. The projector according to claim 13, wherein the collimator lens is formed into an inverted truncated cone shape, and wherein a light emitting surface of the collimator lens has a central inclined surface of a cone shape which is made to project at a center thereof and a side inclined surface which constitutes an inclined surface which is inclined from a perimeter of a bottom portion of the central inclined surface towards a perimeter of the collimator lens.

18. The projector according to claim 13, wherein the collimator lens is formed into an inverted truncated hexagonal pyramid shape, and wherein a light emitting surface thereof is made up of a flat surface portion which is formed at a center thereof in such a manner as to be parallel to a bottom surface of the collimator lens and an inclined surface formed around a perimeter of the flat surface portion, whereby the collimator lens is made to have an inverted truncated hexagonal cone-shaped top portion which is recessed at a center thereof.

19. The projector according to claim 13, wherein colored light emitting diodes such as a red light emitting diode, a green light emitting diode and a blue light emitting diode are used as the light emitting element of the light source unit.

20. The projector according to claim 13, comprising: three light source apparatuses; anda dichroic prism of a regular hexahedron for superposing rays of light from three directions on each other so as to concentrate the rays of light from the three direction into one direction;the plurality of light source apparatuses being disposed one on each of three sides of the dichroic prism.