WO2019075905A1

WO2019075905A1 - Light-emitting device for stage illumination

Info

Publication number: WO2019075905A1
Application number: PCT/CN2017/117782
Authority: WO
Inventors: 凡·贝尔克姆·赫尔曼
Original assignee: 阳睐（上海）光电科技有限公司
Priority date: 2017-10-20
Filing date: 2017-12-21
Publication date: 2019-04-25
Also published as: CN109695825A

Abstract

A light-emitting device for stage illumination is composed of a single light source group (1), wherein the light source group (1) comprises a plurality of sequentially arranged sub-light sources (11) or is composed of a plurality of parallelly arranged light source groups (1), wherein the light source group (1) comprises a single sub-light source (11) or a plurality of sequentially arranged sub-light sources (11). The sub-light source (11) comprises a luminescent crystal (2) and a solid-state light source (3). The luminescent crystal (2) is in an elongated cylinder, and comprises a front end surface (21), a rear end surface (22), and two or more side faces (23). The solid-state light source (3) is arranged at one or more side faces and outputs excitation light to the luminescent crystal (2). The light-emitting device further comprises a light extractor (6) for collimating and homogenizing light, and the light extractor (6) is mounted at the front end face (21) of the luminescent crystal (2). The light-emitting device for stage illumination has the advantages of low etendue, high luminous efficiency, good light intensity and color uniformity, and long service life.

Description

Stage lighting device

Technical field

The invention relates to the technical field of stage lighting equipment, and in particular to a stage lighting device.

Background technique

LED (light emitting diode) has the advantages of high luminous efficiency, good light quality, low energy consumption, long life and small volume, and is widely used in the stage lighting industry. However, the existing LED lighting system can only be used as a lighting device in pattern lamps and dyeing lamps, and cannot be used in beam lamps. The reason is that the luminous intensity of a single LED is low, and the light is emitted in a scattered manner. If LED is used as the light source of the stage lighting equipment, it is necessary to provide a substrate composed of an LED array, which is placed on top of the LED substrate. Matching various optical components. This structure requires a large number of LEDs to be used and laid flat to form a light-emitting surface, so that the amount of optical expansion and the area of light emission are large. At the same time, the optical expansion and illuminating area of the structure will increase correspondingly as the number of LEDs increases. Therefore, the mainstream light source of the beam lamp in the prior art is still an ultra-high pressure mercury lamp. However, the ultra-high pressure mercury lamp has a poor uniformity of brightness in the light-emitting area, a very high requirement for the working temperature, and a heat-dissipating device which requires complicated design, and has a short working life. Therefore, how to develop a new type of stage lighting illuminating device, which can maintain a small optical expansion, can replace the ultra-high pressure mercury lamp as the light source of the beam lamp, and can also be used for other types of stage lighting equipment. It is the direction that those skilled in the art need to study.

Summary of the invention

In order to solve the deficiencies in the prior art, the present invention provides a stage illumination light-emitting device, which has the characteristics of small optical expansion, high luminous efficiency, good light intensity and color uniformity, long service life, and simple heat dissipation design. Used in all kinds of stage lighting equipment.

The specific technical solutions adopted are as follows:

A stage illumination lighting device, the stage illumination lighting device is composed of a single light source group and the light source group is composed of a plurality of sequentially arranged sub-light sources, or is composed of a plurality of side-by-side light source groups and the light source group is composed of The single sub-light source is composed of or consists of a plurality of sequentially arranged sub-light sources; the sub-light source comprises a luminescent crystal and a solid-state light source; the illuminating crystal is an elongated cylinder comprising a front end surface, a rear end surface and a plurality of side surfaces; The solid-state light source is disposed at one or more sides, and outputs excitation light to the illuminating crystal; and further includes a light extractor for collimating the light and making the light uniform, the light extractor being mounted at the front end surface of the illuminating crystal; By adopting the technical solution: a solid-state light source outputs excitation light of a specific wavelength to a side surface of the light-emitting crystal, and the light-emitting crystal absorbs the excitation light of the specific wavelength, and then emits a longer wavelength light therein to convert the wavelength of the light wave. Function, and at the same time, due to the high refractive index of the luminescent crystal, most of the light propagates in the total reflection mode inside the luminescent crystal and finally from the front end surface and Rear end output. The reason why the long-column light-emitting crystal is used is that a large number of solid-state light sources can be placed on the side of the light-emitting crystal. The etendue of these solid-state light sources is much larger than the amount of optical expansion at the front end surface of the luminescent crystal structure, thereby converting a very large optical expansion originally composed of a large number of solid-state light sources into a small optical expansion amount, which satisfies The need for small optical expansion for stage lighting equipment. The structure of the stage illumination device includes at least two sub-light sources because no illuminating crystal can directly emit white light after absorbing light of a specific wavelength, so it is necessary to simultaneously use at least two luminescent crystals to simultaneously excite different spectra. The light constitutes a white light system. The white light here refers to light with a color temperature between 2200K and 10000K and a Duv between plus and minus 0.05. At the same time, by further increasing the kind of illuminating crystal, the entire optical system emits different kinds of colored light on the basis of emitting white light, and can realize a wider color temperature range, a higher color rendering index and better color saturation.

Specifically, in the above stage lighting device, the light extractor adopts any one of a compound parabolic concentrator and a light guiding rod.

Preferably, in the above stage lighting device, the sub-light sources are not equal in length or equal in length.

By adopting the technical solution that the sub-light sources are not equal in length: according to the actual color temperature requirement of the output light, some sub-light sources do not need to be provided with too many solid-state light sources for excitation, and the overall length of the sub-light source is shortened accordingly, without affecting the color temperature. Under the premise of demand, the material cost can be effectively reduced; or by adopting the technical scheme that the sub-light source is equal: in the actual production process, the entire illuminating device is relatively simple to assemble.

More preferably, in the above stage lighting device, a reflective surface is further included, and the reflective surface is fixed at a rear end surface of the light emitting crystal.

By adopting this technical solution, the light reflected from the inside of the illuminating crystal to the rear end surface is reflected again, so that most of the light can be output from the front end surface of the illuminating crystal.

Another preferred solution is that the stage illumination device further includes a supplemental light source fixed to the rear end surface of the illuminating crystal and outputting complementary light to the rear end surface of the illuminating crystal, wherein the complementary light source can adopt a solid state light source.

By adopting this technical solution: inputting a supplementary light source at the rear end surface of the illuminating crystal can also make the entire optical system emit different kinds of colored light on the basis of emitting white light, and can realize a wider color temperature range, a higher color rendering index, and Better color saturation.

Another preferred solution is that the stage illumination device further includes a reflective surface and a complementary light source, and a reflective surface or a complementary light source is fixed at the rear end surface of the light emitting crystal, and the light emitting device includes at least one reflective surface and a supplement. a light source, wherein the supplemental light source outputs supplemental light to a rear end surface of the corresponding illuminating crystal.

In the above-mentioned stage illumination light-emitting device, the types of the light-emitting crystals in each of the sub-light sources may be different, the lengths may be different or the same, the cross-sections are arbitrary shapes, and there may be any combination and arrangement of different kinds.

In the above-mentioned stage lighting illuminating device, compared with the existing ultra-high pressure mercury lamp, it is required to design a relatively complicated heat dissipating device, and the illuminating device only needs to add a heat dissipating plate on the outer side of the illuminating device to achieve better heat dissipating effect.

The invention has the characteristics of small optical expansion, high luminous efficiency, good light intensity and color uniformity, long service life and simple heat dissipation design, and can be used as a lighting device in stage lighting equipment, and can also be used for other entertainment lighting equipment. , navigation, field work and other areas where there is a certain demand for light concentration.

DRAWINGS

The present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

1 is a schematic structural view of Embodiment 1 of the present invention;

Figure 2 is a schematic cross-sectional view of Figure 1, in which the light extractor is omitted;

3 is a schematic structural view of Embodiment 2 of the present invention;

4 is a schematic structural view of Embodiment 3 of the present invention;

Figure 5 is a schematic structural view of Embodiment 4 of the present invention;

FIG. 6 is a schematic structural view of Embodiment 5 of the present invention.

The correspondence between each reference mark and the part name is as follows:

1, light source group; 11, sub-light source; 2, illuminating crystal; 3, solid state light source; 4, reflective surface; 5, supplementary light source; 6, light extractor; 21, front end face; 22, rear end face;

Detailed ways

In order to more clearly illustrate the technical solution of the present invention, it will be further described below in conjunction with various embodiments.

Figure 1-2 shows the structure of Embodiment 1:

A stage illumination device comprising a single light source group 1 consisting of two sub-light sources 11 arranged in sequence; each sub-light source 11 comprising a light-emitting crystal 2 and a solid-state light source 3, respectively; The stripe rectangular column includes a front end surface 21, a rear end surface 22 and four side surfaces 23; the solid state light source 3 is disposed on the upper and lower sides 23 to output excitation light to the illuminating crystal 2. Wherein, the sub-light source 11 located at the rear end of the light source group 1 is fixed with a reflective surface 4 at the rear end surface 22 thereof; and further includes a light extractor 6 for collimating the light and making the light uniform, and the light extractor 6 is installed at the At the front end face 21 of the light-emitting crystal 2 at the front end of the light source group 1. The light extractor 6 in this embodiment employs a compound parabolic concentrator.

In this configuration, the illuminating crystal 2 in the left sub-light source 11 absorbs light having a wavelength of 400 nm to 520 nm emitted from the solid-state light source 3 for which light is output, and emits light having a wavelength of more than 480 nm therein. The illuminating crystal 2 in the sub-light source 11 on the right side absorbs light having a wavelength of 280 nm to 420 nm emitted from the solid-state light source 3 for which light is output, and emits light having a wavelength of 400 nm to 560 nm therein. The light passes through the internal total reflection of the luminescent crystal 2 and the reflection of the reflective surface 4, is directed to the light extractor 6, and is then output by the light extractor 6. By adjusting the different ratios of the light emitted by the two sub-light sources 11, different white lights can be synthesized and output. For example, light with a color temperature of 6000K and Duv between plus and minus 0.04 and a color rendering index greater than 65, such as light with a color temperature of 7500K and Duv between plus and minus 0.03 and a color rendering index greater than 70.

FIG. 3 is a schematic structural view of Embodiment 2:

The difference between Embodiment 2 and Embodiment 1 is that it includes a supplemental light source 5 without a reflective surface 4, and the supplemental light source 5 is fixed at the rear end surface 22 of the luminescent crystal 2 at the rear end of the light source group 1, and emits light. The rear end face 22 of the crystal 2 outputs supplemental light.

In this configuration, the illuminating crystal 2 in the sub-light source 11 on the left side absorbs light having a wavelength of 400 nm to 520 nm emitted from the solid-state light source 3, and emits light having a wavelength of more than 480 nm therein. The illuminating crystal 2 in the sub-light source 11 on the right side absorbs light having a wavelength of 280 nm to 420 nm emitted from the solid-state light source 3 for which light is output, and emits light having a wavelength of 400 nm to 560 nm therein. The supplemental light source 5 emits light having a dominant wavelength of 620 nm. The light is totally reflected by the inside of the luminescent crystal 2, is directed to the light extractor 6, and is then output by the light extractor 6. By adjusting the different ratios of the light emitted by the two sub-light sources 11 and the supplemental light source 5, different white lights can be synthesized and output. Due to the use of the supplemental light source 5, this structure is capable of synthesizing white light of a low color temperature to achieve a wider range of color temperatures, such as light having a color temperature of 5000 K and Duv between plus and minus 0.01 and a color rendering index greater than 90. Moreover, this structure can also increase the color rendering index in the original output color temperature range, such as a color temperature of 6000K and a Duv between plus and minus 0.02, a color rendering index greater than 80, and a color temperature of 7500K and a Duv of plus or minus 0.03. Light with a color rendering index greater than 75. Comparing Example 1, it is apparent that the color temperature width is increased after the supplemental light source 5 is used, and the color rendering index is improved.

4 is a schematic structural view of Embodiment 3:

The difference between the third embodiment and the first embodiment is that it consists of two light source groups 1 arranged side by side, and each light source group 1 is composed of one sub-light source 11 respectively.

In this configuration, the illuminating crystal 2 in the upper sub-light source 11 absorbs light having a wavelength of 280 nm to 420 nm emitted from the solid-state light source 3, and emits light having a wavelength of 400 nm to 560 nm therein. The illuminating crystal 2 in the lower sub-light source 11 absorbs light having a wavelength of 400 nm to 520 nm emitted from the solid-state light source 3 for which light is output, and emits light having a wavelength of more than 480 nm therein. The light passes through the internal total reflection of the luminescent crystal 2 and the reflection of the reflective surface 4, is directed to the light extractor 6, and is then output by the light extractor 6. By adjusting the different ratios of the light emitted by the two sub-light sources 11, different white lights can be synthesized and output. For example, light with a color temperature of 6000K and Duv between plus and minus 0.04 and a color rendering index greater than 65, such as light with a color temperature of 7500K and Duv between plus and minus 0.03 and a color rendering index greater than 70. With respect to Example 1, the overall length was 80% of that of Example 1 in the case where other external conditions were identical.

FIG. 5 is a schematic structural view of Embodiment 4:

The difference between Embodiment 4 and Embodiment 3 is that the lengths of the sub-light sources 11 are not equal.

In this configuration, the illuminating crystal 2 in the upper sub-light source 11 absorbs light having a wavelength of 280 nm to 420 nm emitted from the solid-state light source 3, and emits light having a wavelength of 400 nm to 560 nm therein. The illuminating crystal 2 in the lower sub-light source 11 absorbs light having a wavelength of 400 nm to 520 nm emitted from the solid-state light source 3 for which light is output, and emits light having a wavelength of more than 480 nm therein. The light passes through the internal total reflection of the luminescent crystal 2 and the reflection of the reflective surface 4, is directed to the light extractor 6, and is then output by the light extractor 6. By adjusting the different ratios of the light emitted by the two sub-light sources 11, different white lights can be synthesized and output. For example, light with a color temperature of 6000K and Duv between plus and minus 0.04 and a color rendering index greater than 65, such as light with a color temperature of 7500K and Duv between plus and minus 0.03 and a color rendering index greater than 70. With respect to Example 1, the overall length was 65% of that of Example 1 in the case where other external conditions were identical.

6 is a schematic structural view of Embodiment 5:

The difference between Embodiment 5 and Embodiment 4 is that the supplemental light source 5 is provided at the rear end surface 22 of the upper illuminating crystal 2, and the reflecting surface 4 is not provided.

In this configuration, the illuminating crystal 2 in the upper sub-light source 11 absorbs light having a wavelength of 280 nm to 420 nm emitted from the solid-state light source 3, and emits light having a wavelength of 400 nm to 560 nm therein. The supplemental light source 5 at the rear end face 22 emits light having a dominant wavelength of 620 nm. The illuminating crystal 2 in the lower sub-light source 11 absorbs light having a wavelength of 400 nm to 520 nm emitted from the solid-state light source 3 for which light is output, and emits light having a wavelength of more than 480 nm therein. The light passes through the internal total reflection of the luminescent crystal 2 and the reflection of the reflective surface 4, is directed to the light extractor 6, and is then output by the light extractor 6. By adjusting the different ratios of the light emitted by the two sub-light sources 11 and the supplemental light source 5, different white lights can be synthesized and output. Due to the use of the supplemental light source 5, this structure is capable of synthesizing white light of a low color temperature to achieve a wider range of color temperatures, such as light having a color temperature of 5000 K and Duv between plus and minus 0.01 and a color rendering index greater than 90. Moreover, this structure can also increase the color rendering index in the original output color temperature range, such as a color temperature of 6000K and a Duv between plus and minus 0.02, a color rendering index greater than 80, and a color temperature of 7500K and a Duv of plus or minus 0.03. Light with a color rendering index greater than 75. Comparing Example 4, it is apparent that the color temperature width is increased after the supplemental light source 5 is used, and the color rendering index is improved, while retaining a reflective surface 4 at the rear end surface 22 of the lower luminescent crystal 2 can also keep the entire illuminating device high. Luminous efficiency.

The above is only a specific embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily think of changes or substitutions within the technical scope of the present disclosure. All should be covered by the scope of the present invention. The scope of the invention is defined by the scope of the claims.

Claims

A stage illumination lighting device, characterized in that: the stage illumination lighting device is composed of a single light source group (1) and the light source group (1) is composed of a plurality of sequentially arranged sub-light sources (11), or by a plurality of The light source group (1) arranged side by side is constituted and the light source group (1) is constituted by a single sub-light source (11) or by a plurality of sequentially arranged sub-light sources (11);

The sub-light source (11) comprises a luminescent crystal (2) and a solid-state light source (3); the illuminating crystal (2) is an elongated cylinder comprising a front end surface (21), a rear end surface (22) and a plurality of sides (23); the solid-state light source (3) is disposed at one or more sides (23), and outputs excitation light to the illuminating crystal (2);

Also included is a light extractor (6) for collimating the light and making the light uniform, the light extractor (6) being mounted at the front end face (21) of the light emitting crystal (2).
A stage illumination lighting device according to claim 1, wherein said light extractor (6) employs any one of a compound parabolic concentrator and a light guiding rod.
A stage illumination lighting device according to claim 2, wherein said sub-light sources (11) are unequal in length or equal in length.
A stage illumination device as claimed in claim 3, further comprising a reflective surface (4), said reflective surface (4) being fixed to the rear end surface (22) of said luminescent crystal (2).
The stage illumination lighting device of claim 3, further comprising a supplemental light source (5) fixed to the rear end surface (22) of the luminescent crystal (2), the illuminating crystal The rear end face (22) of (2) outputs supplemental light.
A stage illumination device as claimed in claim 3, further comprising a reflective surface (4) and a supplemental light source (5), wherein a reflective surface (4) is fixed at the rear end surface (22) of the luminescent crystal (2). Or a supplementary light source (5) and the light-emitting device comprises at least a reflective surface (4) and a supplementary light source (5), wherein the supplementary light source (5) supplements the output of the rear end surface (22) of the corresponding light-emitting crystal (2) Light.