WO2017092668A1

WO2017092668A1 - Illumination system

Info

Publication number: WO2017092668A1
Application number: PCT/CN2016/107953
Authority: WO
Inventors: 邹思源; 张权; 李屹
Original assignee: 深圳市光峰光电技术有限公司
Priority date: 2015-12-01
Filing date: 2016-11-30
Publication date: 2017-06-08
Also published as: CN205301793U

Abstract

An illumination system (100, 200, 300), comprising a first light source (1), a second light source (2), a third light source (3), a light combining device (4) and a control device. The first light source (1) comprises a plurality of light-emitting chips (101) and fluorescent powder (102) arranged on the plurality of light-emitting chips (101), fluorescent powder (102) is excited to generate at least two spectrum ranges of light, which has the same color and different spectrum, and such a light is a first color light; the second light source (2) is used to generate a second color light; the third light source (3) is used to generate a third color light; light combining device (4) is used to combine the first color light, the second color light and the third color onto the same light path; the control device is used to control the power supply intensity of the first light source (1), the second light source (2) and the third light source (3). The spectrum range and exiting light intensity of the emergent light of the first light source (1) can be controlled by controlling the power supply intensity of a power supply by the control device, thereby taking both color gamut and brightness into consideration.

Description

Lighting system

Technical field

The utility model relates to the field of optical technology, and more particularly to an illumination system.

Background technique

In the prior art, the illumination system tends to sacrifice the color gamut in order to increase the brightness, and the brightness is sacrificed in order to obtain a better color gamut. 1 is an illumination system of the prior art, which includes a three-channel X-prism, an illumination channel 11, an illumination channel 12, an illumination channel 13, a fly-eye lens 17, a concentrating mirror 18 through-hole 19, and a filter 20. Among them, R primary light and amber LED The primary color light is arranged in a staggered or other manner, and is encapsulated in the light-emitting channel 12, which adopts spatial light combining; the G-based color light and the blue light-emitting LED excite the green light-emitting phosphor to generate a wide-band primary color light, which is arranged in an interlaced or other manner, and is encapsulated in the light-emitting channel. In 11 , it adopts spatial merging; B primary color light is arranged by staggering or other manners, and is packaged in the illuminating channel 13 to generate five primary colors of red, amber, green 1, green 2, and blue, and five basic colors of light. The light is merged by the X-prism through the fly-eye lens 17 and then concentrated by the condensing lens 18 at the through hole 19, and the entire transmission of light of certain wavelength bands is realized by the filter 20, and the light of some bands is partially transmitted to meet the requirements of the black body curve. , thereby obtaining a lighting system with a high color rendering index.

technical problem

In the prior art, the color gamut of the display can be wider by using multi-primary light, but the geometric combination is used, the brightness is still not high, and the brightness is further reduced by filtering through the filter. Therefore, the color gamut and brightness of the technical solution cannot be compatible at the same time.

Technical solution

In view of this, the present invention provides a lighting system to solve the problem that the brightness and color gamut of the lighting system in the prior art cannot be simultaneously considered.

In order to achieve the above object, an illumination system technical solution of the present invention includes: a first light source, a second light source, a third light source, a light combining device, and a control device; the first light source includes a plurality of light emitting chips and is disposed at Phosphors on the plurality of light-emitting chips, the phosphors are excited to generate light of at least two spectral ranges, and the light of the at least two spectral ranges is meta-spectral light, and the meta-spectrum light is a color light; the second light source is for generating a second color light; the third light source is for generating a third color light; the light combining device is for using the first color light, the second color light, and the third The color light is synthesized on the same optical path; the control device controls the power supply intensity of the first light source, the second light source, and the third light source.

The control device is configured to control current, voltage or power input to the first light source, the second light source, and the third light source.

Further, the illumination system further includes a filter element located on the optical path of the first color light for filtering the first color light to form a predetermined color of light. .

Preferably, the filter element comprises a fixing plate, a filter and a driving component; the filter is disposed on the fixing plate and located on an optical path of the first color light; and the driving component is configured to drive the fixed plate to move .

Further, the filter comprises opposite first and second faces, and the first face and the second face are respectively provided with different film layers.

Preferably, the filter element comprises at least two filters having different filter characteristics, the fixing plate is provided with through holes having the same shape and number as the filter, respectively for fixing the filter; the driving component Switching for driving the filter; the control device is also for controlling the movement of the drive assembly.

Further, the control device is configured to control the power supply strengths of the first light source, the second light source, and the third light source according to the filter characteristics of the filter on the optical path.

Preferably, the first color light is green light, the second color light is red light, and the third color light is blue light.

Preferably, the first color light is a wide spectrum light, and the predetermined color light has a spectral range smaller than a spectral range of the first color light.

Preferably, the combined light of the first color light, the second color light, and the third color light is white light.

Beneficial effect

Compared with the prior art, the technical solution provided by the utility model has the following advantages:

In the illumination system provided by the present invention, the first light source generates a first color light, and the first color light is a wide spectrum light, and at least two light emitting chips are emitted by disposing different phosphors on the light emitting chip of the first light source. The first color light has a different spectral range, and the controller controls the power supply intensity of the light emitting chip, such as on, off or high voltage, low voltage, etc., to realize the change of the position of the coordinate point of the first color light, thereby being able to select The light-emitting chip that forms a large color gamut with the second color light and the third color light is turned on, and the brightness is increased by controlling the high power source, the high current, etc. by the control device, and the first color light obtained by exciting the phosphor by the light-emitting chip The brightness is higher than that of the first color light obtained by directly using the LED light-emitting diode; at the same time, the present invention also overcomes the degradation of the brightness and color drift of the light caused by the heat caused by the LED as the first color light in the background art.

DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings to be used in the embodiments or the description of the prior art will be briefly described below. Obviously, the drawings in the following description It is merely an embodiment of the present invention, and those skilled in the art can obtain other drawings according to the provided drawings without any creative work.

1 is a schematic structural view of a conventional lighting system;

2 is a schematic structural view of a lighting system according to a first embodiment of the present invention;

3 is a schematic structural view of a lighting system according to a second embodiment of the present invention;

4 is a schematic structural view of a lighting system according to a third embodiment of the present invention;

FIG. 5 is a schematic structural view of the filter element of the present invention, and FIG. 5-2 is another schematic structural view of the filter element of the present invention;

6 is a filter curve of a filter element in an embodiment of the present invention;

Figure 7 is another filter curve of the filter element in one embodiment of the present invention;

Figure 8 is a chromatogram of an embodiment of the present invention.

BEST MODE FOR CARRYING OUT THE INVENTION

The technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the drawings in the embodiments of the present invention. It is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. example. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative efforts are within the scope of the present invention.

The idea of the present invention is to provide an illumination system capable of satisfying high brightness in the case of a wide color gamut, achieving both color gamut and brightness. The illumination system of the present invention includes a first light source, a second light source, a third light source, a light combining device, and a control device. The combined light of the light of the first light source, the second light source, and the third light source is white light. The light combining device is used to combine the three sets of light sources. The control device is used to control the opening of the three groups of light sources and the intensity of the current. The first light source, the second light source, and the third light source are all laser diodes or LED arrays or an array of laser and LED hybrids.

Referring to Figure 2, the present invention proposes a first embodiment. The illumination system 100 includes a first light source 1, a second light source 2, a third light source 3, a filter element 7, and its light combining elements 4. Wherein, the light combining element 4 is configured to combine the light emitted by the first light source 1 that emits the first color light, the second light source 2 that emits the second color light, and the third light source 3 that emits the third color light on the same road, first The light source 1, the second light source 2, and the third light source 3 are respectively located on three sides of the light combining element 4. Preferably, the first light source 1 adopts a laser diode array, and the at least two laser diode chips 101 are provided with a phosphor 102, and the phosphor 102 is excited by the light emitted by the laser diode chip 101 to generate at least two types of excited light. The at least two kinds of lasers have different spectral ranges, but belong to metamerism (metamorphism is different in color spectrum range, for example, the spectrum of the first blue light is 400 nm to 445 nm, and the spectrum of the second blue light is 425nm~470nm, the first blue light and the second blue light are metachromatic light). The light emitted by the at least two laser diode chips 101 of the first light source 1 includes, but is not limited to, UV light, near UV light or blue light, and the phosphor 102 includes, but is not limited to, blue powder, green powder, yellow powder or red powder. The color of the light emitted by the laser diode chip 101 and the color of the phosphor 102 are selected according to actual needs. Preferably, at least two laser diode chips 101 of the first light source 1 emit blue light, and the phosphors 102 are green powder (the green powders are not identical), wherein one laser diode 1 emits a first green light, and the other laser diode 1 The second green light is emitted, and the first green light and the second green light have different spectral ranges. In this embodiment, the blue laser is used to excite the green phosphor, and the blue phosphor is safe and radiation-free, and at the same time, obtains green light, which overcomes the problem that the traditional green laser is expensive and the green LED is affected by heat.

In this embodiment, a phosphor is disposed on the light-emitting chip of the first light source, and the phosphor can generate the meta-spectral light of different spectral ranges, and the power supply intensity of the light-emitting chip is controlled by the control device, and the first color light is controlled in the chromatogram. The position, so that a wide color gamut range can be obtained, and the phosphor is placed on the chip, a stable first color light can be obtained, and the cost is low. In addition, different light can be obtained by adjusting the power supply intensity, and the intensity of the output light can also be ensured.

In this embodiment, the filter element 7 is located between the light combining element 4 and the first light source 1 for filtering the light emitted by the first light source to obtain light of a specific spectrum. The filter element 7 can include a fixed plate, a filter and a drive assembly, as shown in FIG. The fixing plate may be a rectangular fixing plate 701 as shown in FIG. 5-1. The fixing plate 701 is provided with a hole, and the hole includes, but is not limited to, a circular or regular polygon, and the shape of the hole is different from the filter 702 disposed thereon. The number of the filters 702 is not limited, and the holes provided in the fixing plate 701 may not be provided with filters. For example, filters having different filter characteristics are disposed on the fixed plate 701, such as the filter of the filter characteristic shown in FIG. 6, or the filter is not included, or filtered to obtain a filter of a specific wavelength range. The spectrum of the light sheet, for example, the first filter is 480 nm to 520 nm, and the spectrum of the second filter is 490 nm to 545 nm. By setting the filter, the first color light of different color coordinates can be obtained, so that different color gamut ranges can be obtained. The filter element further includes a drive assembly (not shown) that drives the fixed plate 701 to rotate such that filters or through holes having different filter characteristics are located on the optical path. Fig. 5-2 shows a fixing plate 701' in which the fixing plate is a disk shape, and the filter 702 is evenly distributed around the radial direction of the fixing plate 701'. Of course, the shape of the fixing plate and the number of the filters are not particularly limited. Figure 5 is merely illustrative and is not intended to limit the invention. In addition, the filter of the present embodiment can be coated on both sides, so that the same filter can realize different band pass characteristic filters as shown in FIG. 7, for example, the band pass characteristic of the first side of the filter is When the light of 500 nm or less and 600 nm or more is transmitted, the band pass characteristic of the second surface of the filter is light transmitted through 580 nm to 630 nm, and a filter that transmits 500 nm or less and 600 nm to 630 nm can be obtained. By coating the double-sided film on the filter, not only the number of filters is reduced, the cost is reduced, and the difficulty in fabricating the filter can be reduced.

In order to make the embodiment of the present invention more clear, the embodiment exemplifies that the light emitting chip of the first light source emits blue light, and the phosphor is green, that is, the first color light is green, and the first light source includes a plurality of light emitting chips. Different phosphors are disposed on the plurality of light-emitting chips, and the plurality of light-emitting chips in the first light source excite the phosphors to respectively generate the first green color 801, the second green color 802, the third green color 803, etc. as shown in FIG. When the wavelength ranges of the two color lights and the third color light are fixed, the first color light of the metachromatic spectrum is different from the range of the color gamut covered by the second color light and the third color light. Through the filter characteristics of the filter, green light of different spectral ranges is filtered to adjust the range of the color gamut. By controlling the opening of the plurality of light-emitting chips of the first light source by the control device, it is also possible to obtain green light of different spectral ranges. After the color gamut is fixed, the position of the color of the final output light in the color gamut is controlled by adjusting the supply current, voltage or power of the first light source, the second light source, and the third light source.

Referring to Figure 3, the present invention proposes a second embodiment. The difference between the illumination system 200 in this embodiment and the illumination system 100 of the first embodiment differs only in the position of the filter elements. The filter element 7 of the illumination system 200 is disposed after the light combining device 4 for filtering the combined light of the light combining device. A fly-eye lens 5 and a lens 6 are disposed between the filter element 7 and the light combining device 4, and the fly-eye lens 5 can homogenize the light emitted from the light combining device 4, and the light after the uniformity enters the lens 6, and the lens is evenly distributed. The light is concentrated, and the concentrated light reaches the filter element 7. In this embodiment, after the filter element 7 is disposed behind the light combining device 4, the filter element can filter the combined light to obtain better emitted light with a color coordinate, for example, the combined light is white light, which can be White light filtering produces light of a particular spectral range, such as yellow, green, cyan, and the like. In this embodiment, the fly-eye lens and the lens are arranged in front of the filter element, on the one hand, the outgoing light can be made more uniform, on the other hand, the spot on the filter element can be made smaller, the light loss can be prevented, and the filter element can be performed. volume.

With reference to FIG. 4, the present invention proposes a third embodiment. The illumination system 300 differs from the illumination system 200 only in the manner in which the first light source 1, the second light source 2, and the third light source 3 are positioned differently. The first light source 1 and the second light source 2 in the illumination system 300 are perpendicular to each other, and the light combining device 4 is configured to combine the first light source 1 and the second light source 2 to form a first combined light, and combine the light on the same optical path, and then The third light source 3 is combined, the third light source 3 is disposed in parallel with the second light source 2, and the light combining device 4 combines the light emitted by the first combined light and the third light source 3 to form combined light, and the combined light passes through the fly-eye lens. 5 and the lens 6 exits after reaching the filter element 7. In the present invention, the arrangement manner of the first light source 1, the second light source 2, and the third light source 3 is not particularly limited as long as the light combining device can be used to combine the light emitted by the first light source 1, the second light source 2, and the third light source 3. It can be on the same light path.

In the utility model, the control device controls the power supply strength of the first light source 1, the second light source 2 and the third light source 3, for example, independently controls the current, voltage or power input into the three groups of light source arrays, and can individually control each group of light sources. The current, voltage, or power of a single source in the array. By controlling the power supply intensity of a single light source, on the one hand, the color coordinates of the outgoing light can be adjusted, on the other hand, the color of the outgoing light of the desired effect can be obtained, the filter color of the filter can be reduced, and power consumption can be saved.

The various embodiments in the present specification are described in a progressive manner, and each embodiment focuses on differences from other embodiments, and the same similar parts between the various embodiments may be referred to each other. The above description of the disclosed embodiments enables those skilled in the art to make or use the invention. Various modifications to these embodiments are obvious to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but the scope of the invention.

Claims

What is claimed is: 1. A lighting system, comprising: a first light source, a second light source, a third light source, a light combining device, and a control device;

The first light source includes a plurality of light emitting chips and phosphors disposed on the plurality of light emitting chips, the phosphors being excited to generate light of at least two spectral ranges, and the light of the at least two spectral ranges is the same color a heterogeneous light, the metachromatic light being the first color light;

The second light source is configured to generate second color light;

The third light source is configured to generate a third color light;

The light combining device is configured to combine the first color light, the second color light and the third color light on the same optical path;

The control device controls power supply strengths of the first light source, the second light source, and the third light source.

2. The illumination system of claim 1 wherein said control means is operative to control current, voltage, power and/or switching of the first, second and third sources;

The plurality of light emitting chips included in the first light source are laser diode light emitting chips.

3. The illumination system of claim 1 further comprising a filter element positioned on the optical path of the first color of light for filtering the first color of light to form a predetermined color of light.

4. The illumination system of claim 3, wherein the filter element comprises a fixed plate, a filter, and a drive assembly;

The filter is disposed on the fixed plate and located on the optical path of the first color light;

The drive assembly is used to drive the fixed plate movement.

5. The illumination system of claim 4, wherein the filter comprises opposing first and second faces, the first and second faces being respectively provided with different film layers.

The illumination system according to claim 4, wherein the filter element comprises at least two filters having different filter characteristics, and the fixing plate is provided with through holes having the same shape and number of filters. Separately for fixing a filter; the driving component is configured to drive switching of the filter;

The control device is also used to control the movement of the drive assembly.

7. The illumination system of claim 6, wherein the control means is operative to control the power supply strengths of the first source, the second source, and the third source in accordance with filter characteristics of the filters on the optical path.

8. The illumination system of claim 3, wherein the first color light is green light, the second color light is red light, and the third color light is blue light.

9. The illumination system of claim 8, wherein the first color light is broad spectrum light and the predetermined color light has a spectral range that is less than a spectral range of the first color light.

The illumination system according to any one of claims 1 to 7, characterized in that the combined light of the first color light, the second color light and the third color light is white light.