TWM596319U - Projector capable of increasing light reflecting area - Google Patents

Abstract

The present invention provides a light projector that can increase the light reflection area, and includes a light guide cover composed of a light-transmitting solid cover body. The surface of the cover body includes a light incident surface, a light emitting surface and at least one reflecting surface. A shielding layer is coated on the outer surface of at least one reflective surface, and a plurality of light-emitting elements are disposed on the light incident surface, wherein the at least one reflective surface includes a characteristic reflective surface with a light collecting curvature A reflective portion facing the arc convex in the cover, the light emitting elements provide light projected into the cover from the light incident surface, and the light in the cover passes through the reflection of the characteristic reflection surface and the plurality of reflection portions The light emission is projected outward. In this way, the problem that the projection light of the traditional projector is difficult to distribute uniformly is improved.

Description

Projector capable of increasing light reflecting area

The invention relates to the structure of a light projector, in particular to a light projector which can increase the light reflection area.

A light projector is an object that reflects light emitted by light emitting elements such as light bulbs, lamps, light emitting diodes (LEDs), etc., and emits light to the outside, and the light projector can limit the light source to project into a specific area to increase The illuminance of this particular area.

To increase the illuminance of the projected light, the conventional light projector generally adopts two methods as shown in FIG. 1 and FIG. 2. 1 shows that increasing the number of light-emitting elements 2 is arranged to increase the illuminance of the light projector when projecting to a specific area; FIG. 2 shows that the light-emitting elements 2 are arranged at one end of a light-guiding cover 1 having an arc-shaped reflective surface. The light-gathering effect of the arc-shaped reflecting surface increases the illuminance projected by the light projector to a specific area.

However, the method of using a large number of light-emitting elements 2 in FIG. 1 to increase the illuminance, in addition to increasing the construction cost and occupying space of the projector, also consumes a large amount of electrical energy during use; moreover, the arc in FIG. 2 Although only a small number of light-emitting elements 2 are needed to increase the illuminance by the shape of the reflective surface, the arc-shaped structure of the arc-shaped reflective surface causes most of the light projected by the light projector to be concentrated in the center of the specific area Due to the location, the light is not evenly distributed in the above specific area, so it needs to be improved.

In view of this, the present invention aims to improve the problem that the light projected by the conventional light projector is not evenly distributed, and thereby provide a light projector that can increase the light reflection area.

In a preferred implementation, the technical means of the present invention include: a light guide The cover is composed of a light-transmitting solid cover body. The surface of the cover body includes a light-incident surface, a light-emitting surface, and at least one reflective surface. The outer surface of the at least one reflective surface is covered with a shielding layer; The element is arranged on the light incident surface; wherein, the at least one reflecting surface includes a characteristic reflecting surface with a light-converging curvature, and the characteristic reflecting surface is formed with a plurality of reflecting portions convex toward the arc in the cover. Each light emitting element provides light to be projected into the cover from the light incident surface, and the light in the cover passes through the characteristic reflection surface and the reflection of the plurality of reflection portions to project light outward through the light release surface.

In a further implementation, the cover body is a conical body with at least one taper, the focusing curvature of the characteristic reflecting surface is formed by the conical contour of the cover body, and a hollow imaging channel is formed in the center of the cover body, the An imaging hole and a light release hole are formed at both ends of the imaging channel, respectively. Wherein the light incident surface is ring-shaped and sits on the periphery of the imaging hole, the feature reflection surface and the light release surface are separated by the thickness of the cover body, so that the feature reflection surface is conical as the outer surface of the cover body The light-emitting surface is conical and sits in the imaging channel as the inner surface of the cover. The aperture of the imaging hole is smaller than that of the light-emitting hole, and the characteristic reflection surface and the light-emitting surface are respectively expanded and inclined toward the light-emitting hole by the imaging hole. The plurality of light-emitting elements are arranged in a ring-shaped space in a circular interval, and the ring-shaped housing is disposed on the light incident surface.

In a further implementation, the conical mask body includes a plurality of mask portions having different tapers connected in series. The plurality of cover portions with different tapers include a first cover portion and a second cover portion, the imaging hole is located in the first cover portion, and the light release hole is located in the second cover portion, the The imaging channel has a center line, and the inclination angle θ _{1 of} the first cover part relative to the center line is relatively smaller or larger than the inclination angle θ _{2 of} the second cover part relative to the center line.

In a further implementation, the cover is in the shape of an arc-shaped cup, the focusing curvature of the characteristic reflecting surface is formed by the contour of the arc cup of the cover, and a hollow imaging channel is formed in the center of the cover, the imaging The two ends of the channel respectively form an imaging hole and a light-release hole. The light-incident surface is ring-shaped and sits on the periphery of the light-emitting hole. The feature-reflecting surface and the light-emitting surface are separated by the thickness of the cover, so that the feature-reflecting surface is arc-shaped convex cup-shaped as the cover The outer surface, and the light-emitting surface is in the shape of an arc-concave cup sitting on the imaging channel Daozhong serves as the inner surface of the cover. The aperture of the imaging hole is smaller than that of the light-emitting hole, and the characteristic reflection surface and the light-emitting surface respectively expand from the imaging hole toward the light-emitting hole in a curved manner. The plurality of light-emitting elements are arranged in a ring-shaped space in a circular interval, and the ring-shaped housing is disposed on the light incident surface. The plurality of light-emitting elements are arranged in a ring-shaped space in a circular interval, and the ring-shaped housing is disposed on the light incident surface.

In a further implementation, the cover is in the shape of a curved lobe, and the light collecting curvature of the characteristic reflection surface is formed by the contour of the curved lobe of the cover. Wherein the light incident surface is planarly located between the light emitting surface and the feature reflecting surface, the feature reflecting surface and the light emitting surface are separated by the thickness of the cover to make the feature reflecting surface and the light emitting surface The surface exhibits the same curved shape.

According to the above technology, the technical effect of the present invention is to increase the reflection area of the light source by the reflection part, so that the light provided by the light emitting element can project light to the outside in a uniform distribution manner, thereby improving the illuminance of the light projector.

In addition, the relevant technical details on which the new model can be implemented will be described in subsequent embodiments and drawings.

1, 10‧‧‧ light guide

10a, 10b, 10c, 10d

101‧‧‧The first cover

102‧‧‧The second cover

11a, 11c, 11d

12a, 12c, 12d

13‧‧‧Reflecting surface

13a, 13c, 13d

14‧‧‧Reflection Department

15‧‧‧Acquisition channel

151‧‧‧Acquisition hole

152‧‧‧Light hole

2, 20‧‧‧ light emitting element

21‧‧‧Housing

211‧‧‧Through hole

30‧‧‧ masking layer

C‧‧‧Centerline

θ ₁ , θ ₂ ‧‧‧Tilt angle

FIG. 1 is a schematic diagram of Example 1 of a conventional light projector.

FIG. 2 is a schematic diagram of Example 2 of a conventional light projector.

3 is a cross-sectional view of the first embodiment of the new light projector.

FIG. 3a is a partially enlarged cross-sectional view of the light guide cover in FIG. 3. FIG.

FIG. 4 is a schematic diagram when light rays are projected onto the reflecting portion.

5 is a cross-sectional view of a second embodiment of the new light projector.

6 is a cross-sectional view of a third embodiment of the new light projector.

7 is a cross-sectional view of a fourth embodiment of the new light projector.

First, please refer to FIG. 3 and FIG. 3a together to disclose the first embodiment of the light projector that can increase the light reflection area provided by the present invention, and to illustrate that the light reflector that can increase the light reflection area includes a light guide cover 10 And multiple luminous elements Piece 20, where:

The light guide cover 10 is composed of a light-transmitting solid cover body 10a, and the material of the cover body 10a is a transparent material such as glass or acrylic. The surface of the cover 10a includes a light-incident surface 11a, a light-emitting surface 12a and at least one reflective surface 13, wherein light enters the cover 10a from the light-incident surface 11a, reflects through the light-reflecting surface 12a through the reflection surface 13 Cast light. Further, the reflecting surface 13 is covered with a shielding layer 30 made of metal paint, so that the reflecting surface 13 can reflect light.

The reflective surface 13 includes a characteristic reflective surface 13a having a light-converging curvature. The light-converging curvature means that when light is projected onto the characteristic reflective surface 13a, it will be reflected to a specific area to form a light-concentrating phenomenon. The characteristic reflection surface 13a is formed with a plurality of reflection portions 14 that are convex toward the inner surface of the cover 10a, and the light enters the cover 10a from the light entrance surface 11a, passes through the reflection surface 13a and the reflection portion 14 and passes through the light release surface 12a Casting light outside. Further, in the implementation, the reflecting portion 14 is formed by a plurality of spherical grooves on the characteristic reflection surface 13a of the cover body 10a. The outer surface of the characteristic reflection surface 13a is covered with a shielding layer 30 to make the ball The groove wall of the granular groove forms the reflection portion 14.

Please refer to FIG. 3 again to illustrate that the cover body 10a is a conical body having at least one taper. The light collecting curvature of the characteristic reflection surface 13a is formed by the conical contour of the cover body 10a. A hollow imaging channel 15 is formed in the center of the cover body 10a, and both ends of the imaging channel 15 extend to the surface of the cover body 10a to form an imaging hole 151 and a light release hole 152, the aperture of the imaging hole 151 is smaller than The light-emitting hole 152, and the characteristic reflection surface 13a and the light-emitting surface 12a are respectively expanded and inclined from the imaging hole 151 toward the light-emitting hole 152. The light incident surface 11 a is implemented in a ring shape and sits on the periphery of the imaging hole 151. Further, the characteristic reflection surface 13a and the light-emitting surface 12a are separated by the thickness of the cover 10a, so that the characteristic reflection surface 13a is conical as the outer surface of the cover 10a, and the light-emitting surface 12a is conical It sits in the imaging channel 15 as the inner surface of the cover 10a. In addition, the imaging hole 151 is used for assembling an imaging unit (not shown).

The plurality of light emitting elements 20 are arranged on the light incident surface 11a, and the light emitting elements 20 are implemented as light emitting diodes (LEDs). Further, the plurality of light-emitting elements 20 are arranged in a ring-shaped housing 21 in a circular interval, and the ring-shaped housing 21 is arranged on the light incident surface 11a, so that the light emitted by the light emitting element 20 can enter the cover 10a through the light incident surface 11a. Furthermore, the circulator housing 21 has a through hole 211, and the imaging unit is assembled to the imaging hole 151 through the through hole 211.

Please refer to FIG. 4 to illustrate that when multiple rays of light are respectively projected to different positions on the reflecting portion 14 in the same direction, due to the convex shape of the reflecting portion 14, the incident angle of each light ray in contact with the reflecting portion 14 is different from each other , According to the principle that the angle of incidence is equal to the angle of reflection, the angle of reflection of each ray of light is also different. By this, the multi-angle light reflected by the reflection section 14 increases the direction of projection of the light so that the light will not be concentrated in a certain direction And location.

Please refer to FIG. 5 to disclose the second embodiment of the light projector of the present invention, illustrating that the conical cover body 10b includes a plurality of cover portions with different tapers connected in series. More specifically, the cover portion includes a first cover portion 101 and a second cover portion 102, the imaging hole 151 is located in the first cover portion 101, and the light emitting hole 152 is located in the second cover portion 102, the first cover portion 101 and the center line C between the imaging channel 15 has an inclined angle θ _1, the cover portion 102 and the second imaging center line between the C-channel 15 has an inclination angle θ _2, the inclined The angle θ ₁ is smaller than the tilt angle θ ₂ (that is, θ ₁ <θ ₂ ). In this way, the reflecting area of the cover body 10b for reflecting light can be increased, thereby increasing the projection area of different angles. In addition, the present invention can also be implemented such that the inclination angle θ ₁ is greater than the inclination angle θ ₂ (that is, θ ₁ <θ ₂ ) (not drawn), which are all simple transformations under the new creative concept, and are based on Summarized by the new model and given to Chen Ming.

Referring to FIG. 6, a third embodiment of the light projector of the present invention is disclosed, illustrating that the cover body 10c is in the shape of an arc-shaped cup, and the focusing curvature of the characteristic reflection surface 13c is formed by the contour of the arc cup of the cover 10c. The characteristic reflecting surface 13c and the light emitting surface 12c of the cover body 10c are respectively curvedly expanded from the imaging hole 151 toward the light emitting hole 152, and the light incident surface 11c is annularly located on the periphery of the light emitting hole 152, that is to say The light emitting element 20 is disposed around the light emitting hole 152, so that light is projected to the outside through the through hole 211 through the light emitting hole 152. Further, the characteristic reflection surface 13c and the light-emitting surface 12c are separated by the thickness of the cover 10c, so that the characteristic reflection surface 13c is an arc-shaped convex cup-shaped outer surface of the cover 10c, and the light-emitting surface 12c is arc-shaped Concave cup-shaped is located in the acquisition channel 15 is the inner surface of the cover 10c. Compared with the conventional light guide 1 in FIG. 2, the light guide 10 in this embodiment can increase the reflection area of the light source through the reflection portion 14, so that the light provided by the light emitting element 20 can be evenly distributed Projecting light externally, thereby increasing the illuminance of the projector.

Referring to FIG. 7, the fourth embodiment of the light projector of the present invention is disclosed, illustrating that the cover body 10d is in the shape of a curved lobe, and the light collecting curvature of the characteristic reflection surface 13d is formed by the contour of the curved lobe of the cover 10d. Further, the light incident surface 11d is planarly located between the light emitting surface 12d and the feature reflecting surface 13d, and the feature reflecting surface 13d and the light emitting surface 12 are reflected by the thickness of the cover 10d to cause the feature to reflect The surface 13d and the light-emitting surface 12 exhibit the same curved shape. The light provided by the light-emitting element 20 is reflected by the characteristic reflection surface 13d and the reflection portion 14 to project light in a uniformly distributed manner, thereby improving the illuminance of the light projector.

The above examples merely express the preferred embodiments of the present invention, but they should not be construed as limiting the scope of the patent of the present invention. Therefore, this new model shall be subject to the content of the claims defined in the scope of patent application.

10‧‧‧Light guide

10a‧‧‧cover

11a‧‧‧Into the light side

12a‧‧‧Luminous surface

13‧‧‧Reflecting surface

13a‧‧‧Characteristic reflection surface

14‧‧‧Reflection Department

15‧‧‧Acquisition channel

151‧‧‧Acquisition hole

152‧‧‧Light hole

20‧‧‧Lighting element

21‧‧‧Housing

211‧‧‧Through hole

30‧‧‧ masking layer

Claims (14)

A light projector capable of increasing light reflecting area, including: A light guide cover is composed of a light-transmitting solid cover body, and the surface of the cover body includes a light-incident surface, a light-emitting surface and at least one reflection surface, and the outer surface of the at least one reflection surface is covered with a shielding layer; Multiple light emitting elements are arranged on the light incident surface; Wherein, the at least one reflecting surface includes a characteristic reflecting surface with a condensing curvature, a plurality of reflecting portions formed toward the arc convex in the cover are formed on the characteristic reflecting surface, and the light emitting elements provide light from the incident light The surface is projected into the cover, and the light in the cover passes through the characteristic reflection surface and the reflections of the plurality of reflection parts to project light outward through the light release surface. The light projector which can increase the light reflection area according to claim 1, wherein the cover body is a conical body having at least one taper, the light collecting curvature of the characteristic reflecting surface is formed by the conical contour of the cover body, and the cover body A hollow imaging channel is formed in the center, and an imaging hole and a light release hole are formed at both ends of the imaging channel. The light projector which can increase the light reflecting area as described in claim 2, wherein the light incident surface is ring-shaped and sits on the periphery of the image capturing hole, and the characteristic reflecting surface and the light emitting surface are separated by the thickness of the cover, so that The characteristic reflecting surface is conical and serves as the outer surface of the cover, and the light emitting surface is conical and sits in the imaging channel as the inner surface of the cover. The light projector capable of increasing the light reflecting area as described in claim 3, wherein the aperture of the image capturing hole is smaller than the light emitting hole, and the characteristic reflecting surface and the light emitting surface are respectively expanded and inclined from the image capturing hole toward the light emitting hole . The light projector as claimed in claim 1, wherein the plurality of light emitting elements are arranged in a ring-shaped space in a ring-shaped interval, and the ring-shaped device shell is disposed on the light incident surface. The light projector that can increase the light reflecting area as described in any one of claims 2 to 5, wherein the conical cover body includes a plurality of cover portions having different tapers connected in series. The light projector capable of increasing the light reflection area according to claim 6, wherein the plurality of cover portions with different tapers include a first cover portion and a second cover portion, and the image capturing hole is located in the first cover portion The light release hole is located in the second cover part. The light projector capable of increasing the light reflection area according to claim 7, wherein the imaging channel has a center line, and the inclination angle θ _{1 of} the first cover part relative to the center line is relatively smaller or larger than the second cover part relative to The inclination angle θ _{2 of} the center line. The light projector which can increase the light reflection area as described in claim 1, wherein the cover body is an arc-cup-shaped body, the light collecting curvature of the characteristic reflection surface is formed by the contour of the arc cup of the cover body, and the center of the cover body is formed A hollow imaging channel, and two ends of the imaging channel respectively form an imaging hole and a light release hole. The light projector with increased light reflection area as described in claim 9, wherein the light incident surface is ring-shaped and sits on the periphery of the light emitting hole, and the characteristic reflection surface and the light emitting surface are separated by the thickness of the cover The characteristic reflection surface is an arc-convex cup shape as the outer surface of the cover body, and the light-emitting surface is an arc-concave cup shape sitting in the imaging channel as the inner surface of the cover body. The light projector capable of increasing the light reflecting area as described in claim 10, wherein the aperture of the image capturing hole is smaller than the light emitting hole, and the characteristic reflecting surface and the light emitting surface are respectively curved from the image capturing hole toward the light emitting hole expansion. The light projector with increased light reflection area according to claim 10, wherein the plurality of light-emitting elements are arranged in a ring-shaped space in a ring-shaped interval, and the ring-shaped device shell is disposed on the light incident surface. The light projector which can increase the light reflection area according to claim 1, wherein the cover body is in the shape of a curved lobe, and the light collecting curvature of the characteristic reflecting surface is formed by the contour of the curved lobe of the cover. The light projector capable of increasing the light reflecting area according to claim 13, wherein the light incident surface is planarly located on both sides of the light emitting surface and the feature reflecting surface, the feature reflecting surface and the light emitting surface pass through the cover The interval of the body thickness makes the characteristic reflection surface and the light-emitting surface exhibit the same curved shape.

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