CN104576891B - Fluorescent powder color wheel and white light emitting device - Google Patents
Fluorescent powder color wheel and white light emitting device Download PDFInfo
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- CN104576891B CN104576891B CN201310520440.5A CN201310520440A CN104576891B CN 104576891 B CN104576891 B CN 104576891B CN 201310520440 A CN201310520440 A CN 201310520440A CN 104576891 B CN104576891 B CN 104576891B
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01L—SEMICONDUCTOR DEVICES NOT COVERED BY CLASS H10
- H01L33/00—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof
- H01L33/48—Semiconductor devices with at least one potential-jump barrier or surface barrier specially adapted for light emission; Processes or apparatus specially adapted for the manufacture or treatment thereof or of parts thereof; Details thereof characterised by the semiconductor body packages
- H01L33/50—Wavelength conversion elements
Abstract
The present invention provides a kind of fluorescent powder color wheel and white light emitting devices, wherein the fluorescent powder color wheel, including：Substrate；Yellow fluorescent powder area is located on substrate；Red fluorescence powder area is located on substrate, the concentric pattern that wherein yellow fluorescent powder area intersects with red fluorescence powder area for boundary, and red fluorescence powder area is around yellow fluorescent powder area.The present invention can effectively extend the frequency spectrum and efficiency of red area, and then can effectively improve white light luminous efficiency.
Description
Technical field
The present invention is to be related to white light emitting device more particularly to its fluorescent powder color wheel.
Background technology
Laser-projector is using fluorescent powder color wheel combination solid-state laser excitation light source as display light source, in high power operation
Under, the opto-electronic conversion of projecting apparatus can be substantially improved in photoexcitation efficiency and lumen exports, and be new generation shadow casting technique in recent years
Important light source module.The design of the fluorescent powder color wheel (Phosphor wheel, PW) of laser-projector at present, is broadly divided into list
Region design as shown in Figure 1, and multizone design it is as shown in Figure 2.In Fig. 1, it is to be formed in one or more fluorescent powders
All areas on colyliform substrate, such as single fluorescent powder area 10.In fig. 2, it is that the fluorescent powder of different colours is distinguished into shape
At in the different zones on colyliform substrate, for example, red fluorescence powder area 2R, yellow fluorescent powder area 2Y, green emitting phosphor area 2G, with
In blue colour fluorescent powder area 2B.
Red efficiency in PW is always the light source lumen bottleneck of whole laser-projector, in addition to red fluorescence material itself
Efficiency is poor outer, and as excitation laser wattage increases, red fluorescence powder light extraction declines to a great extent because of heat fading, not only makes projecting apparatus
D65 white balances deviate, and more tie down whole lumen number.In view of this, under high wattage laser excitation, at present mostly with yellow or orange
Fluorescent powder collocation filter extraction feux rouges uses.By taking the PW in single region as an example, yellow light is generated with blue laser excitation yellow fluorescent powder
Afterwards, yellow light is separated by green light and feux rouges with optical splitter, then RGB imaging source of the blue laser as projecting apparatus of arranging in pairs or groups.On however
The red efficiency for stating method is still minimum (~12lm/W), limits D65 white lights luminous efficiency (~54.9lm/W).To sum up institute
It states, how effectively to extend the frequency spectrum and efficiency of red area, be always one of important topic of laser-projector.
Invention content
One embodiment of the invention provides fluorescent powder color wheel, including：Substrate；Yellow fluorescent powder area is located on substrate；And it is red
Color fluorescent powder area is located on substrate, the concentric pattern that wherein yellow fluorescent powder area intersects with red fluorescence powder area for boundary, and red
Color fluorescent powder area is around yellow fluorescent powder area.
The white light emitting device that one embodiment of the invention provides, including：Above-mentioned fluorescent powder color wheel；Blue light laser source is used
To apply blue laser to the boundary in the red fluorescence powder area and yellow fluorescent powder area of fluorescent powder color wheel, while excitated red fluorescence
Powder area is with yellow fluorescent powder area to form the first white light；Optical splitter, to by the first white light be divided into the first feux rouges, the first blue light,
With the first green light；Optical filter, to adjust the first feux rouges, the first blue light, with the first green light to the second feux rouges, the second blue light, with
Second green light；And light-mixing machine, it is mixed into the second white light by the second feux rouges, the second blue light, with the second green light.
The white light emitting device that one embodiment of the invention provides, including：Above-mentioned fluorescent powder color wheel；Blue light laser source is used
To apply blue laser to the boundary in the red fluorescence powder area and yellow fluorescent powder area of fluorescent powder color wheel, while excitated red fluorescence
Powder area is with yellow fluorescent powder area to form the first white light；Optical splitter, the first white light is divided into the first yellow light and the first blue light；
Optical filter, to adjust the first yellow light and the first blue light to the second yellow light and the second blue light；And light-mixing machine, by the second yellow light with
Second blue light is at the second white light.
The beneficial effects of the present invention are fluorescent powder color wheel of the invention can effectively extend red with white light emitting device
The frequency spectrum and efficiency in color region, and then white light luminous efficiency can be effectively improved.
Description of the drawings
Fig. 1 is the vertical view of fluorescent powder color wheel in the prior art.
Fig. 2 is the vertical view of fluorescent powder color wheel in the prior art.
Fig. 3 is the vertical view of fluorescent powder color wheel in one embodiment of the invention.
Fig. 4 is the vertical view of fluorescent powder color wheel in one embodiment of the invention.
Fig. 5 is the schematic diagram of white light emitting device in one embodiment of the invention.
Fig. 6 is in one embodiment of the invention, and blue laser irradiates the schematic diagram in the region of fluorescent powder color wheel.
Fig. 7 is the schematic diagram of white light emitting device in one embodiment of the invention.
Wherein, the reference numerals are as follows：
2B blue colour fluorescent powders area
2G green emitting phosphors area
2R, 3R red fluorescence powder area
2Y, 3Y yellow fluorescent powder area
10 fluorescent powder areas
30,40 fluorescent powder color wheel
50 white light emitting devices
51 blue light laser sources
53,53 ' white light
53B, 53B ' blue light
53G, 53G ' green light
53R, 53R ' feux rouges
55 optical splitters
57 optical filters
59 light-mixing machines
61 blue light illumination regions
Specific implementation mode
Fig. 3 is the vertical view of fluorescent powder color wheel 30 in one embodiment of the invention.In figure 3, yellow fluorescent powder area 3Y with it is red
Color fluorescent powder area 3R is located on substrate (not shown), and wherein yellow fluorescent powder area 3Y is that boundary is adjacent with red fluorescence powder area 3R
Concentric pattern, and red fluorescence powder area 3R is around yellow fluorescent powder area 3Y.
In an embodiment of the present invention, red fluorescence powder can be excitation wavelength between 400nm between 460nm, and radiate
Dominant wavelength is between 590nm to the red fluorescence powder between 680nm, such as CaAlSiN3、Sr2Si5N8Or α-Sialon.In this hair
In a bright embodiment, yellow fluorescent powder can be excitation wavelength between 430nm between 470nm, and radiate dominant wavelength between 520nm
To the yellow fluorescent powder between 560nm, such as Y3Al5O12、Lu3Al5O12Or β-Sialon.
As shown in figure 3, yellow fluorescent powder area 3Y be diameter between 3.5cm to the filled circles between 9.5cm.Of the invention another
In one embodiment, yellow fluorescent powder area 3Y be internal diameter between 3cm between 9cm, and outer diameter between 3.5cm between 9.5cm
Cavity ring, as shown in Figure 4.The yellow fluorescent powder area 3Y of filled circles is compared with saving of labor in Fig. 3, and in Fig. 4 cavity ring yellow fluorescent powder
Area 3Y is compared with material-saving.In Fig. 4, if the internal diameter of yellow fluorescent powder area 3Y is long, aftermentioned blue laser irradiation may be made yellow
The area of color fluorescent powder area 3Y is insufficient, this white light colour cast that excitation will be made to generate.
In an embodiment of the present invention, red fluorescence powder area 3R be internal diameter between 3.5cm between 9.5cm, and outer diameter is situated between
In the cavity ring of 4cm to 10cm.The diameter or hollow of the yellow fluorescent powder area 3Y of internal diameter, that is, filled circles of red fluorescence powder area 3R
The outer diameter of the yellow fluorescent powder area 3Y of ring.If the outer diameter of red fluorescence powder area 3R is too short, aftermentioned blue laser may be made to shine
The area for penetrating red fluorescence powder area 3R is insufficient, this white light colour cast that excitation will be made to generate.
In an embodiment of the present invention, the phosphor powder layer thickness of red fluorescence powder area 3R and yellow fluorescent powder area 3Y is between 80
μm between 200 μm.If the thickness of phosphor powder layer is blocked up, excessive fluorescent powder grain will influence light extraction.If the thickness of phosphor powder layer
Spend thin, phosphor concentration is too low to lead to luminance shortage.
Next by taking the white light emitting device 50 of the fluorescent powder color wheel 40 comprising Fig. 4 as an example, the white light hair of the present invention is explained
Ray machine system.As shown in figure 5, applying blue laser to the fluorescent powder color wheel 40 of rotation first with blue light laser source 51, blue light is made to swash
All boundaries of light average shot red fluorescence powder area 3R and yellow fluorescent powder area 3Y, avoid fluorescent powder in fluorescent powder area because
Fixed point is irradiated and thermal damage for a long time.
As shown in fig. 6, the boundary such as blue light illumination of blue laser irradiation red fluorescence powder area 3R and yellow fluorescent powder area 3Y
Feux rouges and yellow light with excitated red fluorescent powder area 3R and yellow fluorescent powder area 3Y simultaneously, and are radiated in region 61 simultaneously.Above-mentioned blue light
The feux rouges and yellow light of the blue light collocation radiation of script, that is, form white light 53 in laser.In an embodiment of the present invention, blue laser
The area ratio of red fluorescence powder area 3R and yellow fluorescent powder area 3Y is irradiated between 1:10 to 1:Between 0.1.Implement in the present invention one
In example, blue laser irradiates the area ratio of red fluorescence powder area 3R and yellow fluorescent powder area 3Y between 1:3 to 3:Between 1.At this
It invents in another embodiment, blue laser irradiates the area ratio of red fluorescence powder area 3R and yellow fluorescent powder area 3Y between 1:1.2
To 1:Between 0.8.If the area that blue laser irradiates red fluorescence powder area 3R is larger, red light extraction is mostly so that last white light
Chromaticity coordinates red shift, and colour temperature is relatively low.If the area that blue laser irradiates yellow fluorescent powder area 3R is larger, yellow light extraction will be dominated
Last white light chromaticity coordinates and high color temperature.Although it is understood that in Fig. 6 blue light illumination region 61 be dotted region,
In the case that fluorescent powder color wheel 40 rotates, blue light illumination region 61 is actually annular section.
As shown in figure 5, optical splitter 55 such as grating and/or prism divide white light 53 for feux rouges 53R, blue light 53B and green light
53G (or dividing white light 53 for yellow light and blue light), and above-mentioned feux rouges 53R, blue light 53B, the brightness with green light 53G are measured respectively
(or brightness of yellow light and blue light).Then benchmark is made with the photochromic of minimum brightness, and it is adjusted with such as optical filter of optical filter 57
His photochromic intensity and chromaticity coordinates, then with light-mixing machine 59 such as lens or photoconductive tube by after adjustment feux rouges 53R ', blue light 53B ', with
Green light 53G ' (or yellow light and blue light after adjustment) is mixed to form white light 53 '.In an embodiment of the present invention, the CIE of white light 53 '
Coordinate is (0.3127,0.3290).
In Figure 5, the substrate material of fluorescent powder color wheel 40 is reflection material such as metal or dielectric layer glass.However at other
In embodiment, the substrate material of fluorescent powder color wheel also can be light-transmitting materials, and end depends on the needs.When the substrate material of fluorescent powder color wheel
When matter is light-transmitting materials, then the optical path that white light 53 ' is generated after blue laser irradiation fluorescent powder color wheel is as shown in Figure 7.
In order to which the above and other objects, features and advantages of the present invention can be clearer and more comprehensible, several embodiments cited below particularly
The appended attached drawing of cooperation, is described in detail below：
Embodiment
In following embodiments, the substrate diameter of fluorescent powder color wheel is 55mm.The outer diameter in the fluorescent powder area of outer shroud is 55mm, interior
Diameter is 50mm.The outer diameter in the fluorescent powder area of inner ring is 50mm, internal diameter 44mm.The thickness of phosphor powder layer is 100 μm.Red fluorescence
Powder is CaAlSiN3, yellow fluorescent powder Y3Al5O12And green emitting phosphor is Lu3Al5O12.Blue laser source wavelength is 445nm.
In following embodiments, the CIE coordinates of blue light are (0.150,0.060), and the CIE coordinates of green light are (0.300,0.600), and feux rouges
CIE coordinates be (0.640,0.330).To blend together the white light that CIE coordinates are (0.3127,0.3290), above-mentioned feux rouges, blue light,
The optimal proportion of green light is 20~22%:4~5%:70~75%.
Embodiment 1
After evenly mixing by the silica gel of the yellow fluorescent powder of 60wt% and 40wt%, yellow fluorescence layer is formed in entire substrate
On.With the white brightness generated after the fluorescent powder color wheel of blue laser irradiation rotation；Through optical splitter light splitting feux rouges, blue light, with
The brightness of green light；Feux rouges, blue light, the white brightness with mixed light again after green light are adjusted through optical filter；And effective initial white
Light ratio is as shown in table 1.
Embodiment 2
By the yellow fluorescent powder of 30wt%, the red fluorescence powder of 30wt%, with the silica gel of 40wt% after evenly mixing, formed it is red-
Yellow fluorescent powder mixed layer is on entire substrate.With the white brightness generated after the fluorescent powder color wheel of blue laser irradiation rotation；
Feux rouges, blue light through optical splitter light splitting, the brightness with green light；Through optical filter adjust feux rouges, blue light, with mixed light again after green light
White brightness；And effectively initial white light ratio is as shown in table 1.
Embodiment 3
The yellow fluorescent powder of 60wt% is formed into yellow fluorescent powder area in glimmering as inner ring, then by the red of 60wt% on substrate
Light powder formed red fluorescence powder area on substrate be used as outer shroud.With the red fluorescence of the fluorescent powder color wheel of blue laser irradiation rotation
The white brightness generated behind powder area and the boundary in yellow fluorescent powder area；It is feux rouges through optical splitter light splitting, blue light, bright with green light
Degree；Feux rouges, blue light, the white brightness with mixed light again after green light are adjusted through optical filter；And effective initial white light ratio is such as
Shown in table 1 and table 2.In this embodiment, the area ratio in blue laser irradiation red fluorescence powder area and yellow fluorescent powder area is 1:
1。
Table 1
| Embodiment 1 | Embodiment 2 | Embodiment 3 | |
| Initial white brightness (lm/W445nm) | 201.4 | 105.7 | 149.3 |
| Feux rouges brightness (lm/W445nm) | 12.1 | 35 | 25 |
| Green light brightness (lm/W445nm) | 146.3 | 27.7 | 81.3 |
| Blue light brightness (lm/W445nm) | 43 | 43 | 43 |
| White brightness (lm/W after adjustment445nm) | 54.9 | 36.7 | 108.3 |
| Effective initial white light ratio | 27.3% | 34.7% | 72.5% |
As shown in Table 1, the concentric design of the embodiment of the present invention has than directly mixing red fluorescence powder with yellow fluorescent powder
There are white brightness and effective initial white light ratio after higher adjustment.
Embodiment 4-1
Embodiment 4-1 is similar to Example 3, the difference is that blue laser irradiation red fluorescence powder area and yellow fluorescent powder area
Area ratio be 3:1.
Embodiment 4-2
Embodiment 4-2 is similar to Example 3, the difference is that blue laser irradiation red fluorescence powder area and yellow fluorescent powder area
Area ratio be 1:3.
Embodiment 5
The green emitting phosphor of 60wt% is formed into green emitting phosphor area in being used as inner ring on substrate；By the red fluorescence of 60wt%
Powder formed red fluorescence powder area on substrate be used as outer shroud.With the red fluorescence powder of the fluorescent powder color wheel of blue laser irradiation rotation
The white brightness generated behind area and the boundary in green emitting phosphor area；Feux rouges, blue light through optical splitter light splitting, the brightness with green light；
Feux rouges, blue light, the white brightness with mixed light again after green light are adjusted through optical filter；And effective initial white light ratio such as table 2
It is shown.In this embodiment, the area ratio in blue laser irradiation red fluorescence powder area and green emitting phosphor area is 1:1.
Table 2
| Embodiment 3 | Embodiment 4-1 | Embodiment 4-2 | Embodiment 5 | |
| Initial white brightness (lm/W445nm) | 149.3 | 115.6 | 163.2 | 162.2 |
| Feux rouges brightness (lm/W445nm) | 25 | 32.4 | 21.6 | 23.6 |
| Green light brightness (lm/W445nm) | 81.3 | 40.2 | 98.6 | 95.5 |
| Blue light brightness (lm/W445nm) | 43 | 43 | 43 | 43 |
| White brightness (lm/W445nm) after adjustment | 108.3 | 53.9 | 101 | 110 |
| Effective initial white light ratio | 72.5% | 46.6% | 61.9% | 67.8% |
As shown in Table 2, embodiment 5 (green inner ring with infrared ring) though fluorescent powder color wheel design than embodiment 3 (yellow inner ring with
Infrared ring) fluorescent powder color wheel design there is white brightness after higher adjustment, but the effective initial white light ratio of embodiment 5
Less than embodiment 3.This is because the green light brightness in the initial white light of embodiment 5 is excessively high, it is therefore desirable to filter out more green light with
It is photochromic up to required white light.The green light being filtered out can not utilize, and can cause the other problems such as consume energy and radiate.
Although the present invention is disclosed as above with multiple preferred embodiments, however, it is not to limit the invention, any ability
The technical staff in domain, without departing from the spirit and scope of the present invention, when can arbitrarily change and retouch, therefore the present invention
Protection domain is when subject to as defined in claim.
Claims (12)
1. a kind of fluorescent powder color wheel, including：
One substrate；
One yellow fluorescent powder area is located on the substrate；And
One red fluorescence powder area is located on the substrate,
Wherein the yellow fluorescent powder area and the red fluorescence powder area are the concentric pattern that boundary is adjacent, to allow a blue laser to apply
The boundary in the yellow fluorescent powder area and the red fluorescence powder area is added to, and the red fluorescence powder area surround the yellow fluorescent powder area,
The wherein phosphor powder layer thickness in the yellow fluorescent powder area and the red fluorescence powder area between 80 μm to 200 μm, and
Wherein blue laser irradiates the area ratio in the red fluorescence powder area and the yellow fluorescent powder area between 1:10 to 1:0.1 it
Between.
2. fluorescent powder color wheel as described in claim 1, wherein the yellow fluorescent powder area be diameter between 3.5cm to 9.5cm it
Between filled circles.
3. fluorescent powder color wheel as described in claim 1, wherein the yellow fluorescent powder area be internal diameter between 3cm between 9cm, and
Outer diameter is between 3.5cm to the cavity ring between 9.5cm.
4. fluorescent powder color wheel as described in claim 1, wherein the red fluorescence powder area be internal diameter between 3.5cm to 9.5cm it
Between, and outer diameter is between 4cm to the cavity ring between 10cm.
5. fluorescent powder color wheel as described in claim 1, the wherein excitation wavelength in the yellow fluorescent powder area between 430nm extremely
Between 470nm, and dominant wavelength is radiated between 520nm between 560nm.
6. fluorescent powder color wheel as described in claim 1, the wherein excitation wavelength in the red fluorescence powder area between 400nm extremely
Between 460nm, and dominant wavelength is radiated between 590nm between 680nm.
7. a kind of white light emitting device, including：
Fluorescent powder color wheel as described in claim 1；
One blue light laser source, to apply a blue laser to the red fluorescence powder area of the fluorescent powder color wheel and the yellow fluorescence
The boundary in powder area, while exciting the red fluorescence powder area with the yellow fluorescent powder area to form one first white light；
One optical splitter, first white light is divided into one first feux rouges, one first blue light and one first green light；
One optical filter, to adjust first feux rouges, first blue light and first green light to one second feux rouges, one second indigo plant
Light and one second green light；
And a light-mixing machine, it is mixed into one second white light by second feux rouges, second blue light, with second green light.
8. white light emitting device as claimed in claim 7, wherein the CIE coordinates of second white light are (0.3127,0.3290).
9. white light emitting device as claimed in claim 7, the wherein blue laser irradiate the area in the red fluorescence powder area, with
The area in the yellow fluorescent powder area is irradiated between 1:10 to 1:Between 0.1.
10. a kind of white light emitting device, including：
Fluorescent powder color wheel as described in claim 1；
One blue light laser source, to apply a blue laser to the red fluorescence powder area of the fluorescent powder color wheel and the yellow fluorescence
The boundary in powder area, while exciting the red fluorescence powder area with the yellow fluorescent powder area to form one first white light；
One optical splitter, first white light is divided into one first yellow light and one first blue light；
One optical filter, to adjust first yellow light and first blue light to one second yellow light and one second blue light；
And a light-mixing machine, by second yellow light and second blue light at one second white light.
11. white light emitting device as claimed in claim 10, wherein the CIE coordinates of second white light be (0.3127,
0.3290)。
12. white light emitting device as claimed in claim 10, the wherein blue laser irradiate the area in the red fluorescence powder area,
Area with the irradiation yellow fluorescent powder area is between 1:10 to 1:Between 0.1.
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| CN114413194A (en) * | 2022-01-27 | 2022-04-29 | 上海度淳科技有限公司 | Light-emitting component with strong smoke penetration and firefighter lighting lamp |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102330888A (en) * | 2010-07-12 | 2012-01-25 | 红蝶科技(深圳)有限公司 | Light mixing type monochromatic light source with function of fluorescent powder excitation and projection optical engine using same |
| WO2013007818A1 (en) * | 2011-07-14 | 2013-01-17 | Barco N.V. | Rotating wavelength conversion element |
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| US20120201030A1 (en) * | 2011-02-07 | 2012-08-09 | Intematix Corporation | Photoluminescence color wheels |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102330888A (en) * | 2010-07-12 | 2012-01-25 | 红蝶科技(深圳)有限公司 | Light mixing type monochromatic light source with function of fluorescent powder excitation and projection optical engine using same |
| WO2013007818A1 (en) * | 2011-07-14 | 2013-01-17 | Barco N.V. | Rotating wavelength conversion element |
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