CN213237059U

CN213237059U - Lighting device and lamp

Info

Publication number: CN213237059U
Application number: CN202022674925.8U
Authority: CN
Inventors: 杨毅
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-11-18
Filing date: 2020-11-18
Publication date: 2021-05-18
Anticipated expiration: 2030-11-18

Abstract

The utility model discloses a lighting device and lamps and lanterns, including luminous light source and light-emitting beam, light-emitting beam is along its optical axis with luminous half angle alpha outgoing, its characterized in that: the light source is arranged in the light source, the light emergent part is used for emitting light beams, the light emergent part comprises a second reflecting surface, the light emitted by the light source comprises first angle light and second angle light, the second angle light is emitted towards the second reflecting surface, and the second angle light is converged to form the light beams after being reflected by the second reflecting surface; the first reflecting surface is used for reflecting light which cannot be reflected by the second reflecting surface back to the light source again, and reaches the second reflecting surface after scattering and reflection of the light source.

Description

Lighting device and lamp

Technical Field

The utility model relates to the field of lighting technology, specifically speaking relates to a lighting device and lamps and lanterns.

Background

The lighting device is usually used in cooperation with the reflective cup according to the use requirement, such as when light with a certain light-emitting angle is obtained or the light-emitting intensity is enhanced, and the condition that the light source shields the light-emitting light path of the reflective cup easily occurs in cooperation with the reflective cup and the light source. Once the light source blocks the light path of the light cup, there will be dark spots of the emergent light and waste of light energy.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the weak point of above-mentioned conventional art, the utility model provides an utensil is avoided the light source to shelter from the lighting device of light-emitting light path and is utilized this lighting device's lamps and lanterns.

In order to solve the above problems, the utility model adopts the following technical scheme: an illumination device, includes luminous light source and emergent light beam, emergent light beam along its optical axis with luminous half angle alpha outgoing, its characterized in that: the light source is arranged in the light source, the light emergent part is used for emitting light beams, the light emergent part comprises a second reflecting surface, the light emitted by the light source comprises first angle light and second angle light, the second angle light is emitted towards the second reflecting surface, and the second angle light is converged to form the light beams after being reflected by the second reflecting surface; the light source also comprises at least one part of light recovery part, wherein the light recovery part comprises a first reflecting surface, the first angle light is emitted to the first reflecting surface and returns to the light source after being reflected by the first reflecting surface, and the light source has the effect of scattering and reflecting the first angle light; the light source emits light in a direction opposite to the light-emitting direction of the outgoing light beam.

As an improvement of the technical scheme: the second reflecting surface is a spherical surface, a foot C on a connecting line from the sphere center O of the second reflecting surface to the light emitting point A of the light source and the focus B of the convergence of the emergent light beams is positioned on the midpoint of the connecting line, and the foot C is positioned between the sphere center O and the second reflecting surface.

As an improvement of the technical scheme: the distance between the light emitting point A of the light source and the focus B of the light emitting beam convergence is L, the radius of the spherical surface corresponding to the second reflecting surface is R, the distance from the spherical center O of the second reflecting surface to the point C of the vertical foot is y,

as an improvement of the technical scheme: the light source for emitting light is a fluorescence light emitting device, and the laser light source for emitting laser, wherein the fluorescence light emitting device emits fluorescence after the laser excites the fluorescence light emitting device.

As an improvement of the technical scheme: the fluorescence light-emitting device is a reflection type fluorescence piece, the laser light source is located on one side, far away from the reflection type fluorescence piece, of the light recovery portion, the light recovery portion is provided with a light through hole, and laser penetrates through the light through hole to excite the reflection type fluorescence piece.

As an improvement of the technical scheme: a first lens is arranged in the light through hole, a third reflecting surface is arranged on one surface, close to the reflective fluorescent sheet, of the first lens, and the third reflecting surface is a spherical surface; and a part of the light with the first angle is converged after being reflected by the third reflecting surface and returns to the reflective fluorescent sheet, and the third reflecting surface is plated with a film coating layer for transmitting laser reflection fluorescence.

As an improvement of the technical scheme: the first reflecting surface is arranged around the second reflecting surface, and the first reflecting surface and the second reflecting surface are spliced to form a concave surface.

As an improvement of the technical scheme: the light source fixing device further comprises a fixing heat dissipation plate for fixing the light source, and the fixing heat dissipation plate is fixedly arranged on the light recovery part.

As an improvement of the technical scheme: the second reflecting surface is an ellipsoid, one focus corresponding to the ellipsoid is a light emitting point of the light source, and the other focus is a focus for converging the outgoing light beams.

Since the technical scheme is used, compare with prior art, the utility model discloses in order to make the light-emitting light beam not sheltered from by the light source, the second plane of reflection sets up around first plane of reflection, in order to avoid the light that extravagant light source sent, first plane of reflection is used for reflecting back the light source again that can not be reflected by the second plane of reflection to reach the second plane of reflection after the scattering and the reflection of light source.

The present invention will be further described with reference to the accompanying drawings and the following detailed description.

Drawings

Fig. 1 is a cross-sectional view of a lighting device.

Fig. 2 is a cross-sectional view of a lighting device.

Fig. 3 is a cross-sectional view of a lighting device.

Fig. 4 is a cross-sectional view of a lighting device.

Detailed Description

Example 1:

as shown in fig. 1, an illumination device includes a light source 101 and an outgoing light beam 121, where the outgoing light beam 123 of the illumination device exits along an optical axis 131 thereof at an emission half angle α, and further includes a light exiting portion 102 that exits the outgoing light beam 121, where the light exiting portion 102 includes a second reflection surface 103, where the light emitted by the light source 101 includes a first angle light 121 and a second angle light 122, the second angle light 122 exits toward the second reflection surface 103, and the second angle light 122 reflected by the second reflection surface 103 converges to form the outgoing light beam 123; the light source further comprises at least one part of the light recovery part 104, the light recovery part 104 comprises a first reflecting surface 105, the first angle light 121 is emitted to the first reflecting surface 105, the first angle light 121 reflected by the first reflecting surface 105 is reflected to the light source 101, and the light source 101 has the function of scattering and reflecting the first angle light 121; the light source emits light in a direction opposite to the light-emitting direction of the outgoing light beam.

According to the use requirement of the lighting device, an outgoing light beam 123 with the light-emitting half angle alpha is needed, in order to meet the use requirement, the light source is opposite to a second reflecting surface 103 capable of emitting light with the light-emitting half angle alpha, and the light reflected by the second reflecting surface 103 forms the outgoing light beam 123. Depending on whether the light emitted from the light source can be reflected by the second reflecting surface 103 into the first angle light 121 and the second angle light 122, the light that cannot be reflected by the second reflecting surface 103 is the first angle light 121, and the light that can be reflected by the second reflecting surface 103 is the second angle light 122. Since the first angle light 121 cannot be reflected by the second reflective surface 103, the first angle light 121 is not part of the outgoing light beam 123 at this time. The light emitted from the light source 101 cannot be completely converted into the outgoing light beam 123, and the utilization rate of the light source 101 is low. In order to improve the utilization rate of the light emitted by the light source 101, the first reflecting surface 105 is arranged in the light emitting range of the first angle light 121, the first reflecting surface 105 reflects the first angle light 121 back to the light source 101, the light source 101 includes a light emitting surface, and the light emitting surface scatters and reflects the first angle light 121, so that after the first angle light 121 reflected back to the light emitting surface by the first reflecting surface 105 is scattered and reflected by the light emitting surface, a part of the first angle light 121 is converted into the second angle light 122, and the utilization rate of the light emitted by the light source 101 is improved.

In order to substantially increase the utilization rate of the light emitted from the light source 101, in a preferred embodiment, the first reflective surface 105 and the second reflective surface 103 are spliced to form a concave surface. After the first reflecting surface 105 and the second reflecting surface 103 are spliced into a concave surface, the situation that the first angle light 121 and the second angle light 122 are emitted from the space between the first reflecting surface 105 and the second reflecting surface 103 and the light emitted by the light source 101 cannot be fully utilized is avoided, so that the utilization rate of the light emitted by the light source 101 is low.

In order to ensure the integrity of the light spot of the outgoing light beam 123 and ensure that the light emitted from the light source 101 can fill the second reflecting surface 103, because the outgoing light beam 123 is formed by the second angle light 122 reflected by the second reflecting surface 103, the first reflecting surface 105 is disposed around the second reflecting surface 103 in a preferred embodiment. The second reflecting surface 103 is surrounded by the first reflecting surface 105, and enough second-angle light 122 is reflected by the second reflecting surface 103, so that no dark area exists in a light spot formed by the emergent light beam 123.

The half-angle α of the outgoing light beam 123 also needs to be within a reasonable range to avoid the obstruction of the light source 101 and facilitate the collection of the outgoing light beam 123. Alpha is more than or equal to 10 degrees and less than or equal to 60 degrees. When the half-angle α of the outgoing light beam 123 is within the angle range, the outgoing light beam is not blocked by the light source 101, and secondly, the use of a lens for light collection is more facilitated.

In the light emitting device, there is a positional relationship between the center O of the sphere corresponding to the second reflecting surface 103, the light emitting point a of the light source 101, and the focus point B where the outgoing light beam 123 converges, according to the requirements of the outgoing position, the light emitting angle, and the like of the outgoing light beam 123. The second reflecting surface is a spherical surface, a foot C on a connecting line from the center O of the second reflecting surface 103 to the light emitting point a of the light source and the focus B of the light beam convergence is located on the midpoint D of the connecting line, and the foot C is located between the center O of the sphere and the second reflecting surface. From this positional relationship, when the light emitting point a of the light source 101 and the focal point B at which the outgoing light beam 123 converges are between the second reflecting surface 103 and the spherical center O corresponding to the second reflecting surface 103, the converging focal point B formed by reflecting the light emitting point a of the light source 101 by the second reflecting surface 103 is more preferable. Two of the feet C on the connecting line from the center O of the second reflecting surface 103 to the light emitting point A of the light source and the focus B of the convergence of the emergent light beams are positioned on the midpoint D of the connecting line, and one of the feet C between the center O and the second reflecting surface is selected.

In order to apply the distance relationship to actual production, the applicant obtains a distance relationship between the spherical center O corresponding to the second reflecting surface 103 and the connection line L between the light emitting point a of the light source and the focus point B on which the outgoing light beams converge after a plurality of experiments.

The distance between the light emitting point A of the light source and the focus B of the light-emitting beam convergence is L, the radius of the spherical surface corresponding to the second reflecting surface is R, the distance from the spherical center O of the second reflecting surface to the light emitting point A of the light source and the focus B of the light-emitting beam convergence is y,

when y, R and L satisfy the above formula, the light emitting point a of the light source 101 is reflected by the second reflecting surface 103 to form a converging focus point B.

The light source 101 emitting light provides the entire device with light, and the light source 101 has the ability to scatter and reflect the light emitted by itself. One preferred embodiment is where the light source 101 is an LED light emitting chip. The LED light-emitting chip is low in price, convenient to obtain and convenient to install and use.

Since the light source 101 needs to emit light toward the first and

second reflection surfaces

105 and 103, the light source 101 needs to be fixed. In a preferred embodiment, the light source device further includes a fixed heat dissipation plate 106 for fixing the light source 101, and the fixed heat dissipation plate 106 is fixedly disposed on the light recovery unit 104. Since the light source 101 is an LED light emitting chip, the LED light emitting chip is fixed on the fixed heat dissipating plate 106 by means of bonding or the like, and the mounting accuracy of the LED light emitting chip is higher. The fixed heat dissipation plate 106 can be used for dissipating heat of the light source 101, so as to prevent the light source 101 from being damaged or having a short life due to an excessive temperature.

Example 2

As shown in fig. 2, the LED light emitting chip is used as a light source, which is low in cost, easy to obtain, and convenient to use and install, but the LED light emitting chip is affected by its own power, and the power for illumination is increased by increasing the number of the LED light emitting chips in high-power illumination. In order to solve the problem of high-power illumination, a preferred embodiment is that the light source for emitting light is a fluorescent light emitting device, and further includes a laser light source 210 for emitting laser light, and the laser light 224 excites the fluorescent light emitting device and then the fluorescent light emitting device emits fluorescent light. The fluorescent light emitting device is a reflective fluorescent sheet 201, the laser light source 210 is positioned on one side of the light recovery part 204 far away from the reflective fluorescent sheet 201, the light recovery part 204 is provided with a light through hole 207, and the laser 224 passes through the light through hole 207 and excites the reflective fluorescent sheet 201. The reflected laser light emitted by the reflective fluorescent sheet 201 is full-angle light-emitting, and can scatter and reflect the light emitted by the reflective fluorescent sheet 201, so that the technical scheme utilizes the reflective fluorescent sheet 201 to replace an LED light-emitting chip and is applied to high-power and long-distance illumination. The excited light emitted from the reflective fluorescent sheet 201 is divided into a first angle light 221 and a second angle light 222 according to requirements. Since the fluorescent light emitting device is the reflective fluorescent sheet 201, and the reflective fluorescent sheet 201 emits light toward the first and second

reflective surfaces

205 and 203, it is necessary that the laser light 224 excites the reflective fluorescent sheet 201 and does not block the first and

second angle lights

221 and 222 emitted from the reflective fluorescent sheet 201. Therefore, the laser light source 210 is located on the side of the light recovery unit 204 away from the reflective fluorescent sheet 201, the light recovery unit 204 is provided with a light passing hole 207, and the laser light 224 passes through the light passing hole 207 and excites the reflective fluorescent sheet 201. Since the laser light 224 has collimation, the beam size of the laser light 224 passing through the light transmission hole 207 is small, the light transmission hole 207 has a small size, and the influence on the first angle light 221 is negligible.

The second angle light 222 emitted by the second reflecting surface 203 forms an outgoing light beam 223 with a half angle α, so the surface shape of the second reflecting surface 203 determines the emission angle of the outgoing light beam 223. According to a preferred embodiment, the second reflective surface 203 is an ellipsoid, and one corresponding focus of the ellipsoid is a light emitting point of the light source, and the other focus is a focus where the outgoing light beam converges. According to the geometric characteristics of the ellipsoid, any straight line from one focus of the ellipsoid is reflected by the spherical surface of the ellipsoid and returns to the other focus of the ellipsoid. It may still be suitable when the second reflective surface 203 is ellipsoidal.

Example 3

Although the effect of the small size of the light-passing hole 307 on the first-angle light 321 is negligible, a portion of the first angle 321 will still exit the light-passing hole 307. The following technical solutions are disclosed in order to reduce the first angle light 321 from exiting through the light hole 307.

As shown in fig. 3, a first lens 308 is disposed in the light-passing hole 307, a third reflecting surface 311 is disposed on a surface of the first lens 308 close to the reflective fluorescent sheet 301, and the third reflecting surface 311 is a spherical surface; a part of the first angle light 321 is reflected by the third reflecting surface 311 and then converged and returns to the reflective fluorescent sheet 301, and the third reflecting surface 301 is coated with a coating layer for transmitting the laser light 324 and reflecting the fluorescent light. A first lens 308 is arranged in the light through hole 307, one surface of the first lens 308 close to the reflective fluorescent sheet 301 is a spherical surface, the spherical surface recovers fluorescence, the part of first-angle light 321 emitted by the reflective fluorescent sheet 301 and irradiated on the spherical surface of the first lens 308 is reflected back to the reflective fluorescent sheet 301, and if the aim is to be achieved, the first lens 308 is coated with a coating layer which can transmit laser 224 and reflect fluorescence. Since the third reflective surface 311 and the first reflective surface 305 both collect the fluorescence emitted from the reflective fluorescent sheet 301, the spherical centers of the first reflective surface 305 and the third reflective surface 311 need to be overlapped, and the spherical radii of the first reflective surface 305 and the third reflective surface 311 may be different. In a preferred mode, the spherical radius of the third reflecting surface 311 is the same as that of the first reflecting surface 305. The spherical radii corresponding to the first reflecting surface 305 and the third reflecting surface 311 are the same, and at this time, the first reflecting surface 305 and the third reflecting surface 311 are spliced into a whole, so that the fluorescent light recycling effect is better. The first lens 308 may be fixed in the light-passing hole 307 or at a notch corresponding to the light-passing hole 307 by means of adhesion.

Because the reflective fluorescent sheet 301 is adopted, the luminous power of the whole device is improved, the corresponding heat dissipation requirement is higher, and in order to solve the heat dissipation problem of the whole device, a preferable embodiment is that a fixed heat dissipation plate 306 is fixed on the light recovery part 304 and seals the opening of the light recovery part 304, a light outlet 313 is arranged on the fixed heat dissipation plate 306, and the light beam 323 exits from the light outlet 313.

Example 4

The fluorescence light-emitting device comprises a reflection type fluorescence light-emitting piece and a transmission type fluorescence piece, the reflection type fluorescence piece is adopted in the implementation mode, and due to the light-emitting characteristics of the reflection type fluorescence piece and the characteristics of the technical scheme, the reflection type fluorescence piece is matched with the light-through hole and the like, so that the technical difficulty and the processing cost are increased.

As shown in fig. 4, in order to solve the above problem, in a preferred embodiment, the light source for emitting light is a laser light source 410 for exciting the transmissive fluorescent sheet 401 by the transmissive fluorescent sheet 401, the laser light source 401 is disposed on a side of the transmissive fluorescent sheet 401 away from the light recovery unit 404, and the transmissive fluorescent sheet 401 emits fluorescent light to the first and second

reflective surfaces

405 and 403 after the transmissive fluorescent sheet 401 is excited by the laser light 424 emitted by the laser light source 410. The fluorescent light emitting device in this embodiment is selected as the transmissive fluorescent sheet 401, and the transmissive fluorescent sheet 401 according to this embodiment functions as the light source in example 1. Laser light source 410 is fixed to be set up on fixed heating panel 406, and fixed heating panel 406 is fixed to be set up on light recycling portion 204, and this technical scheme need not to set up logical unthreaded hole on light recycling portion 404, has reduced the processing degree of difficulty, can not influence light recycling, has avoided the waste of fluorescence, has improved the utilization ratio of light.

The present invention is not limited to the embodiments described above, but the embodiments are only preferred embodiments of the present invention and should not be considered as limiting the scope of the present invention. All the equivalent changes and improvements made according to the application scope of the present invention should fall within the patent coverage of the present invention.

Claims

1. An illumination device, includes luminous light source and emergent light beam, emergent light beam along its optical axis with luminous half angle alpha outgoing, its characterized in that: the light source is arranged in the light source, the light emergent part is used for emitting light beams, the light emergent part comprises a second reflecting surface, the light emitted by the light source comprises first angle light and second angle light, the second angle light is emitted towards the second reflecting surface, and the second angle light is converged to form the light beams after being reflected by the second reflecting surface; the light source also comprises at least one part of light recovery part, wherein the light recovery part comprises a first reflecting surface, the first angle light is emitted to the first reflecting surface and returns to the light source after being reflected by the first reflecting surface, and the light source has the effect of scattering and reflecting the first angle light; the light source emits light in a direction opposite to the light-emitting direction of the outgoing light beam.

2. A lighting device as recited in claim 1, wherein: the second reflecting surface is a spherical surface, a foot C on a connecting line from the sphere center O of the second reflecting surface to the light emitting point A of the light source and the focus B of the convergence of the emergent light beams is positioned on the midpoint of the connecting line, and the foot C is positioned between the sphere center O and the second reflecting surface.

3. A lighting device as recited in claim 2, wherein: the distance between the light emitting point A of the light source and the focus B of the light emitting beam convergence is L, the radius of the spherical surface corresponding to the second reflecting surface is R, the distance from the spherical center O of the second reflecting surface to the point C of the vertical foot is y,

4. a lighting device as recited in claim 1, wherein: the light source for emitting light is a fluorescence light emitting device, and the laser light source for emitting laser, wherein the fluorescence light emitting device emits fluorescence after the laser excites the fluorescence light emitting device.

5. A lighting device as recited in claim 4, wherein: the fluorescence light-emitting device is a reflection type fluorescence piece, the laser light source is located on one side, far away from the reflection type fluorescence piece, of the light recovery portion, the light recovery portion is provided with a light through hole, and laser penetrates through the light through hole to excite the reflection type fluorescence piece.

6. A lighting device as recited in claim 5, wherein: a first lens is arranged in the light through hole, a third reflecting surface is arranged on one surface, close to the reflective fluorescent sheet, of the first lens, and the third reflecting surface is a spherical surface; and a part of the light with the first angle is converged after being reflected by the third reflecting surface and returns to the reflective fluorescent sheet, and the third reflecting surface is plated with a film coating layer for transmitting laser reflection fluorescence.

7. A lighting device as recited in claim 1, wherein: the first reflecting surface is arranged around the second reflecting surface, and the first reflecting surface and the second reflecting surface are spliced to form a concave surface.

8. A lighting device as recited in claim 1, wherein: the light source fixing device further comprises a fixing heat dissipation plate for fixing the light source, and the fixing heat dissipation plate is fixedly arranged on the light recovery part.

9. A lighting device as recited in claim 1, wherein: the second reflecting surface is an ellipsoid, one focus corresponding to the ellipsoid is a light emitting point of the light source, and the other focus is a focus for converging the outgoing light beams.

10. A light fixture, characterized by: a lighting device comprising any one of claims 1-9.