DE102013200989A1 - Color wheel for a lighting device - Google Patents

Abstract

The color wheel (2) for a lighting device (1) is equipped with a carrier substrate (3) and at least one externally illuminatable phosphor region (6-8) mounted thereon, at least one phosphor region (6, 7) being mounted on the carrier substrate (3). opposite side is at least partially covered by at least one color filter (11, 12). A lighting device (1) has at least one such color wheel (2) and at least one primary light source (Q), in particular semiconductor light source, for irradiating the color wheel (2) with primary light (P), which by means of the at least one phosphor region (6-8) of the color wheel (2) is at least partially wavelength convertible, on.

Description

The invention relates to a color wheel with a carrier substrate and at least one externally illuminatable phosphor region mounted thereon. The invention also relates to a lighting device with at least one such color wheel. The invention is particularly applicable to vehicle headlights and projectors. The invention is particularly applicable to LARP ("Laser Activated Remote Phosphor") light emitting devices in which the at least one phosphor region is illuminated by a spaced apart laser.

Lighting devices of the type concerned with a rotatable color wheel are generally well known. An externally irradiated (primary) light beam, e.g. a blue light beam of a laser diode, on the at least one phosphor region. The phosphor region has wavelength-converting phosphor which converts the incident light beam at least partially into (secondary) light of different, typically larger, wavelength and radiates it back. However, the secondary light is not line sharp, but typically has a spectral width with an associated peak wavelength and associated dominant wavelength. The secondary light thus has an associated (converted) color spectrum.

Since the externally irradiated light beam is stationary with respect to the lighting device, but the color wheel rotates, the phosphor area rotates under the externally irradiated light beam. The externally irradiated light beam thereby describes a, typically annular, illumination track on the color wheel. In the case of a plurality of phosphor regions arranged along this illumination track, these phosphor regions serially generate light components from the secondary light generated by them and possibly primary light. It is also known not to perform wavelength conversion on at least a portion of the illumination track, e.g. by providing a purely reflective reflection region or a transmissive transmitted-light region in order to also provide a light component of the primary light without admixture of secondary light. The serial sequence of the light components can happen so quickly at a corresponding rotational speed of the color wheel that the human eye can no longer resolve the light components and perceives an integrated mixed light. This mixed light has a color resulting from the ratio of the serial light components. In order to produce a white mixed light, red, green and blue light components are often generated serially, if necessary, additional yellow or amber light components for producing a warm white mixed light. For this purpose, a blue primary light beam and blue-red as well as blue-green and possibly blue-yellow converting phosphor regions are usually seconded to the color wheel. These phosphor areas have corresponding blue-red, blue-green or possibly blue-yellow converting phosphors.

For demanding projection applications (e.g., home theater or a simulation), currently available blue-red and blue-green converting phosphors are not well suited for LARP projectors with blue laser light sources. Thus, a dominant wavelength of the green secondary light is too large and the red secondary light is too low. Furthermore, the saturation of the green secondary light is too low.

To overcome these disadvantages, it has hitherto been known to use, in addition to the color wheel, a filter wheel rotating in synchronism with it, optically downstream, e.g. in front of an integrator inside a DLP projector. This filter wheel causes additional costs, additional space and additional effort to his control of the filter wheel. Particularly critical is the exact synchronization of the filter areas located on the filter wheel with associated dye areas of the color wheel.

It is the object of the present invention to at least partially overcome the disadvantages of the prior art and, in particular, to provide an improved possibility of expanding a color space generated by a color wheel.

This object is achieved according to the features of the independent claims. Preferred embodiments are in particular the dependent claims.

The object is achieved by a color wheel for a light-emitting device with a substrate (hereinafter referred to as "carrier substrate" without restriction of generality) and at least one externally illuminatable phosphor region mounted thereon, wherein at least one phosphor region at least partially faces at least on its side facing away from the carrier substrate a color filter is covered. This color wheel has the advantage that the color filter is a part of the color wheel and thus can be dispensed with an independent filter wheel with its disadvantages. So there is no need for synchronization, and there is a cost reduction due to a lower complexity of the structure. Also, such a particularly compact construction of the associated lighting device is possible.

The color filter is thus optically downstream of the phosphor region.

It is a development that the secondary light and possibly the primary light as the useful light of the same side of the color wheel is radiated, on which the primary light is irradiated ("reflective arrangement"). In this case, the external primary light beam first passes through the color filter and then strikes the phosphor region. The secondary light generated therefrom and possibly primary light components are blasted again through the color filter.

In addition, it is a further development that the carrier substrate is reflective, in particular reflective, at least on its side carrying the phosphor regions. The reflective design allows a particularly high light output.

It is a development that the secondary light and possibly the primary light is emitted as useful light from another side of the color wheel than that to which the primary light is irradiated ("transmitted light arrangement"). In this case, the external primary light beam initially strikes a first side of the phosphor region. The secondary light generated by this phosphor region and optionally transmitted primary light components are then blasted through the color filter. The color filter is located on the other side of the carrier substrate for the primary light irradiation.

It is also a development that the secondary light and possibly an unconverted primary light component is generated as useful light in a reflective arrangement, however, e.g. the primary light beam is irradiated through the color wheel in a region without wavelength conversion in transmitted light arrangement ("hybrid arrangement"). For passing the primary light beam, the color wheel may have a window or a cutout in at least one section of the light path.

It is also a further development that at least one phosphor region is completely covered by a color filter. As a result, the entire secondary light emitted by this phosphor region is filtered.

It is also a further development that at least one phosphor region is only partially covered by a color filter. As a result, the secondary light emitted by the phosphor region is only partially filtered, and light components having a different dominance wavelength can be generated by means of a phosphor region. For example, from a yellow-converting phosphor, unfiltered yellow secondary light and filtered, e.g. red-shifted or green-shifted, secondary light are generated.

It is also a further development suitable for producing light components having a different wavelength of dominance from a phosphor area such that a phosphor area is at least partially covered at different partial areas of different color filters. For example, by means of a yellow-converting phosphor from the originally generated yellow secondary light, one e.g. be generated by filtering red-shifted and green-shifted by filtering secondary light.

The at least one color filter may in particular be applied directly to at least one phosphor region, e.g. by ion beam-assisted deposition. The at least one color filter may in particular be applied in a flat contact with at least one phosphor region.

It is also a development that the carrier substrate has a high thermal conductivity, preferably of at least 15 W / (m · K), more preferably of at least 150 W / (m · K). This enhances heat dissipation and thus cooling of the at least one phosphor region. Preferably, the carrier substrate is made of metal, e.g. Aluminum or copper.

It is still a development that the carrier substrate is present as a plate or disc, in particular as a circular plate. The carrier substrate may be connected to rotate with a drive motor, e.g. via a centrically arranged drive shaft.

It is an embodiment that on the carrier substrate a plurality of different phosphor areas are mounted with different phosphor, which are covered by different color filters. This allows a particularly large color space or "gamut" to be achieved.

It is still an embodiment that at least one phosphor region is covered by a color filter which filters out at least one short wavelength wavelength range from the secondary light converted by the phosphor region. Thus, a shift of the dominant wavelength and thus the color can be achieved in the direction of a larger wavelength. Such Filtering can be achieved in particular by a long-pass filter or a bandpass filter. Such a dye region may in particular have a red light-converting or "red" phosphor.

It is a further embodiment that at least one phosphor region is covered by a color filter which filters out at least one long-wavelength wavelength range from the secondary light converted by the phosphor region. As a result, a shift of the dominant wavelength and thus the color in the direction of a smaller wavelength can be achieved. Such filtering can be achieved, in particular, by means of a shortpass filter or a bandpass filter. Such a dye region may in particular have a green light-converting or "green" phosphor.

It is yet another embodiment that at least one phosphor region is not covered by a color filter. Thus, a secondary light not shifted by filtering in its dominant wavelength may also be used. Such a dye region may in particular have a yellow or amber light-converting or "yellow" or "amber" phosphor.

It is furthermore an embodiment that the at least one phosphor region is arranged between the carrier substrate and another, transparent substrate (hereinafter referred to as "filter substrate" without restriction of generality) and the at least one color filter is integrated as a filter region in the light-permeable filter substrate. As a result, it is possible to dispense with a plurality of color filters, which considerably simplifies installation and provides a particularly robust color wheel. In the presence of a plurality of phosphor regions, the filter substrate may therefore have a plurality of different filter regions.

At least one filter region may be obtained, for example, by treatment of the base material of the filter substrate, e.g. Glass, e.g. by infiltration. Alternatively or additionally, at least one filter region may be formed by a coating of the base material with one or more filter layers. The filter areas may be e.g. be designed as an absorption filter and / or as a dielectric filter.

The filter substrate may generally be a transparent material with high thermal conductivity, e.g. Glass, glass ceramic, sapphire, transparent ceramics, etc.

However, in principle, a plurality of separately manufactured color filters may also be arranged on the color wheel, e.g. arranged on a respective phosphor region and / or stacked on top of each other.

The base material of the filter substrate is preferably transparent in order to maintain a high luminous efficacy. The base material of the filter substrate is preferably highly thermally conductive for improved cooling, e.g. with a thermal conductivity of at least 1 W / (m · K).

It is also a preferred embodiment, in particular for a reflective arrangement, that the carrier substrate has at least one externally illuminable reflection area not occupied by phosphor. The reflection area reflects the irradiated primary light without wavelength conversion and thus allows a simple way a well-defined proportion of light of the primary light to the mixed light.

For a transmitted light arrangement or a hybrid arrangement, the carrier substrate may have at least one non-transmissive transmission region, e.g. a window so that the primary light can radiate without wavelength conversion through the color wheel. This primary light component can later be combined with the reflected light components.

It is a development that the reflection area no color filter is connected downstream. This can e.g. be achieved by means of a simply transparent region of the filter substrate or by means of a cutout or window in the filter substrate at the location of the reflection region.

It is also an embodiment that at least one light-permeable cover covering a phosphor region and / or reflection region is antireflection-coated on at least one side. This cover may be, for example, the filter substrate.

In particular, the arrangement is preferred in which at least one reflection region or transmitted light region, at least one red-converting phosphor region and at least one green-converting phosphor region are arranged on the carrier substrate; wherein the red-converting phosphor region is further covered by a long-pass color filter which filters out a short wavelength wavelength range from the (red) secondary light emitted from the red converting phosphor region; and wherein the green converting phosphor region is covered by a bandpass pass color filter or short pass color filter which filters out a long wavelength region from the (green) secondary light emitted from the green converting phosphor region. This arrangement produces by simple means an extended color space, in particular for producing white mixed light.

It is still an embodiment that at least one yellow-converting phosphor region is arranged on the carrier substrate, whereby, for example, a color rendering index of the mixed useful light or mixed light can be increased. The yellow-converting phosphor region is preferably not covered by a color filter.

The object is also achieved by a lighting device comprising at least one color wheel as described above and at least one primary light source for irradiating the color wheel Primary light which is at least partially wavelength-convertible by means of the at least one phosphor region of the color wheel.

It is a development that the at least one primary light source has at least one semiconductor light source. The at least one semiconductor light source may in particular comprise at least one laser, in particular a laser diode, and / or at least one light-emitting diode.

It is yet another embodiment that the primary light source emits blue light. A lighting device configured in this way is efficient and can also be provided inexpensively. Alternatively, e.g. also a use of UV light as a primary light conceivable, in particular with additional provision of converting into blue light phosphor on the color wheel.

It is further an embodiment that the lighting device is a projection device, e.g. for the reproduction of pictures and films ("home cinema"), for simulation or as vehicle headlights.

The above-described characteristics, features and advantages of this invention, as well as the manner in which they are achieved, will become clearer and more clearly understood in connection with the following schematic description of an embodiment, which will be described in more detail in conjunction with the drawings. In this case, the same or equivalent elements may be provided with the same reference numerals for clarity.

1 shows a sectional view in side view of a basic structure of a lighting device with a color wheel;

2 shows in plan view a color wheel according to the invention;

3 shows the color wheel according to the invention as a sectional view in side view;

4 shows a spectral filter characteristic of a bandpass filter for filtering the blue-green converted and green secondary light, respectively;

5 shows a spectral distribution or spectral range of a typical unfiltered green secondary light;

6 shows a spectral distribution of one by means of the bandpass filter 4 filtered green secondary light;

7 shows a spectral filter characteristic of a long-pass filter for filtering the blue-red converted or red secondary light;

8th shows a spectral distribution of a typical unfiltered red secondary light;

9 shows a spectral distribution of one by means of the long-pass filter 7 filtered red secondary light; and

10 shows an achievable color space or gamut of a lighting device with color wheel without color filter and a lighting device with the color wheel according to the invention.

1 shows a sectional view in side view of a basic structure of a lighting device in the form of eg an image projector 1 with a color wheel 2 , The color wheel 2 has a disk-shaped carrier substrate 3 on, which by a centrally arranged, motor-driven drive shaft 4 in a rotation D is displaceable.

On a front illuminated by primary light P front 5 are phosphor regions provided with wavelength-converting phosphor 6 arranged. The phosphor areas 6 convert the incident on them, eg blue, primary light P at least partially, preferably completely, in secondary light S longer wavelength. The reflected secondary light S can be further guided and / or shaped by means of a coupling-out optical system O. The primary light P may be generated in particular by means of at least one semiconductor light source in the form of a laser Q.

Depending on the rotational position of the color wheel 2 become successively different phosphor areas 6 illuminated. It is also possible that an area of the carrier substrate 3 which transmits the primary light without wavelength conversion either ("reflective arrangement") or, as indicated, lets it pass through ("transmitted light arrangement"). The secondary light S and the transmitted primary light P can later be reunited in order to produce a total mixed mixed light. This, preferably white, mixed light can for example be directed to an imaging element such as a DLP mirror (not shown).

In the arrangement shown, the primary light P emitted by the laser Q becomes a partially transmissive mirror, eg a dichroic mirror 14 , gelengt, which is designed to be reflective of the primary light, for the secondary light S, however, permeable. This allows the primary light P perpendicular to the color wheel 2 be irradiated. Moreover, the secondary light S passing through the coupling-out optical system O is free of primary light components.

At the back of the carrier substrate 3 is also one

2 shows a color wheel according to the invention 2 in plan view of the front 5 , On the carrier substrate 3 Of highly reflective aluminum or copper are six ring sector-shaped phosphor areas 6 . 7 , and 8th as well as a transmitted light area 9 , which together form a ring on which a lighting track B of the primary light P is located. The associated light spot F of the primary light P thus moves along the areas 6 - 9 , The areas 6 - 9 are each formed twice, namely mirror-symmetrical to a rotation axis A of the carrier substrate 3 , The axis of rotation A here corresponds to a longitudinal axis or axis of symmetry of the carrier substrate 3 , Although the areas 6 - 9 Here have the same angular width, the invention is not limited thereto.

At least the phosphor areas 6 . 7 , and 8th are of a common, circular disk-shaped filter substrate 10 covered. The filter substrate 10 has four color filters in the form of filter areas 11 and 12 on, which at least the phosphor areas 6 respectively. 7 cover. The filter areas 11 . 12 For example, they may be formed by dielectric layers or layer stacks applied to a transparent base material. The filter substrate 10 may also be at least partially antireflection coated on one side and / or on two sides.

The transmitted light area 9 is as a cutout or window in the carrier substrate 3 educated. In its position, the filter substrate likes 10 In particular, have a non-filtering area, which is preferably antireflex coated on both sides to reduce light losses, alternatively a section.

As in 3 shown as a sectional view in side view, has the carrier substrate 3 at the phosphor areas 6 - 8th for receiving the respective phosphor Ph a trough or depression 13 in the front 5 , The cross-sectional shape of the depression 13 is not limited and may be, for example, rectangular, conical or free-shaped. The carrier substrate 3 here has a thickness of about 0.5 mm, the phosphor areas 6 - 8th a thickness of about 0.1 mm to 0.3 mm, the filter substrate has a thickness of not more than 1 mm, for example between 0.1 mm and 0.5 mm. The phosphor Ph fills the depression 13 preferably completely off, so that at the transition between the filter substrate 10 and the phosphor Ph by reducing a difference in the refractive index compared to air as low as possible reflection losses occur. On the front 5 of the carrier substrate 3 becomes the filter substrate 10 laid flat and fastened, eg glued on. As a result, the phosphor is hermetically sealed, ie protected from environmental influences.

In this figure, this is exemplary of the phosphor region 6 shown. The filter substrate 10 shows corresponding to the to the phosphor area 6 associated filter area 11 ,

Specifically, like the two opposing phosphor areas 6 each have a blue-green converting phosphor, which converts blue primary light P into green secondary light Sg. For this purpose, primary light P generated by the blue laser Q first strikes the filter area 11 ,

In general, the filter substrate, here: 10 , at least one transparent, particularly thermally conductive layer, for example an ITO layer 15 , on one side, for example as shown on the front, or on both sides.

4 shows a spectral filter characteristic of the associated filter area 11 as a plot of a transmission coefficient T over a wavelength λ in nm. The filter range 11 is formed as a band-pass filter for filtering the blue-green converted secondary light Sg. The filter area 11 filters the blue primary light P to only a very small extent. Consequently, the filter area is on 11 impinging primary light P passed through almost undamped and impinges on the phosphor area 6 , There, the primary light P is substantially completely converted into the unfiltered green secondary light Sg.

The green secondary light Sg points, as in 5 shown as a plot of spectral power density W / nm in relative units over a wavelength λ in nm, a broad or non-singular spectral range or spectral distribution. A color coordinate P4 in the associated color space according to CIExy1931 has the values x = 0.3465 and y = 0.5864, as well as in 10 shown.

The unfiltered green secondary light Sg is passed through the color filter 11 reflected back and filtered there.

6 shows a spectral distribution of a filtered blue-green converted or green secondary light Sg * analogous to 5 , Through the filter area 11 In particular, a longer-wavelength spectral range of the original green secondary light Sg is suppressed or filtered, whereby a dominant wavelength has shifted towards shorter wavelengths. A color coordinate P4 * of the filtered secondary light Sg * in the associated color space according to CIExy1931 has the values x = 0.2690 and y = 0.6813, as in 10 shown. Already hereby the achievable or controllable color space enlarged. The filtered green secondary light Sg * is decoupled as a useful light component, for example by means of the coupling-out optical system O.

The two opposite phosphor areas 7 have purely by way of example in each case a blue-red converting phosphor, which converts the blue primary light P into red secondary light Sr.

7 shows a spectral filter characteristic of the associated filter area 12 as a plot of a transmission coefficient T over a wavelength λ in nm. The filter range 12 is designed as a long-pass filter for filtering the blue-red converted secondary light Sg. The filter area 12 practically does not filter the blue primary light P. Impacting primary light P passes through the filter area 12 So practically lossless, especially if at least the primary light side surface is anti-reflection coated.

At the phosphor area 7 For example, the primary light P is substantially completely converted into the unfiltered red secondary light Sr. The red secondary light Sr also has, as in 8th as a plot analogous to 5 shown, a broad or non-singular spectral range. A color coordinate P2 in the associated color space according to CIExy1931 has the values x = 0.6220 and y = 0.3769, as well as in 10 shown. The unfiltered red secondary light Sr is then passed through the filter area 12 reflected back and filtered there.

9 shows a spectral distribution of one by means of the filter area 12 filtered blue-red converted secondary light Sr * analogous to the application according to 6 , Through the filter area 12 In particular, a short-wave spectral range of the original green secondary light Sr is suppressed or filtered, whereby a dominant wavelength in the direction of larger wavelengths hinschiebt out. A color coordinate P2 * of the filtered secondary light Sr * in the associated color space according to CIExy1931 has the values x = 0.6915 and y = 0.3083, as in 10 shown. Again, the achievable or controllable color space is increased.

The two opposite phosphor areas 8th have purely by way of example in each case a blue-yellow converting phosphor, which converts the blue primary light P in the yellow secondary light Sy. These phosphor areas 8th No color filter is assigned. Thus, an associated color coordinate P3 of the secondary light Sy in the associated color space according to CIExy1931 remains unchanged. The filter substrate 10 likes the fluorescent areas 8th be anti-reflection coated to reduce light losses.

10 shows an achievable color space or Gamut to CIExy1931 a lighting device with color wheel without color filter (dashed lines) and a lighting device 1 with the color wheel according to the invention 2 (dash-dotted line).

While a color coordinate P1 of the unconverted by the transmitted light area 9 of the color wheel 2 Through irradiation of the primary light P and the color coordinate P3 of the yellow secondary light Sy remains unchanged, the filter widening the color space by shifting the color coordinates P2 or P4 of the lighting device with color wheel without color filter to color coordinates P2 * and P4 * of the lighting device 1 with the color wheel 2 with the filter areas 11 - 12 causes.

While the invention has been further illustrated and described in detail by the illustrated embodiment, the invention is not so limited and other variations can be derived therefrom by those skilled in the art without departing from the scope of the invention.

Thus, purely by way of example, red, green, yellow and blue light components for the white mixed light have been described. However, the invention is not limited thereto and may also use other and / or additional light colors, e.g. greenish-white ("mint") and amber ("amber"). Also, e.g. the use of UV light as a primary light and an additional provision of a convertible into blue light phosphor and associated phosphor area possible. For example, red, green and yellow portions of light can also be achieved by appropriate partial filtering of yellow or other suitable light, e.g. as described above.

In the case of non-normal incidence of the secondary radiation, here: the green secondary radiation Sg and the red secondary radiation Sr, on dielectric color filters, eg 11 and 12 , the transmission properties of the color filters may change. For larger angles of incidence S, the filter edges shift in the direction of shorter wavelengths. For the green bandpass filter 11 this is equivalent to a reduction in the dominant wavelength and an increase in the y-coordinate in the CIExy1931 diagram. The color space is thereby further increased, but the luminous flux is reduced. For the red long-pass filter 12 this is also equivalent to a reduction in the dominant wavelength, but in this case the color space is reduced and the luminous flux is increased.

In principle, the at least one color filter can also be integrated into the carrier substrate or attached directly thereto, e.g. without use of a filter substrate. For example, phosphor may be incorporated in the support substrate, e.g. potted therein, and the carrier substrate over the phosphor with a filter, e.g. a filter layer or a filter layer stack, be occupied.

Generally, "on", "an", etc. may be taken to mean a singular or a plurality, in particular in the sense of "at least one" or "one or more" etc., unless this is explicitly excluded, e.g. by the expression "exactly one", etc.

Also, a number may include exactly the specified number as well as a usual tolerance range, as long as this is not explicitly excluded.

LIST OF REFERENCE NUMBERS

1

image viewer

2

Color wheel

3

carrier substrate

4

drive shaft

5

front

6

Phosphor region

7

Phosphor region

8th

Phosphor region

9

By light area

10

filter substrate

11

filter area

12

filter area

13

deepening

14

semitransparent mirror

15

ITO layer

A

axis of rotation

B

track lighting

D

rotation

λ

wavelength

F

light spot

O

output optical system

P

primary light

P1

color coordinate

P2

color coordinate

P3

color coordinate

P4

color coordinate

Ph

fluorescent

Q

laser

S

secondary light

sg

green secondary light

Sr

red secondary light

sy

yellow secondary light

T

transmission coefficient

W / lm

 spectral power density

Claims (15)

Color wheel ( 2 ) for a lighting device ( 1 ) with a carrier substrate ( 3 ) and at least one externally illuminable phosphor region ( 6 - 8th ), wherein at least one phosphor region ( 6 . 7 ) on its carrier substrate ( 3 ) facing away at least partially from at least one color filter ( 11 . 12 ) is covered. Color wheel ( 2 ) according to claim 1, wherein on the carrier substrate a plurality of different phosphor regions ( 6 . 7 ) are mounted with different phosphor, which of different color filters ( 11 . 12 ) are covered. Color wheel ( 2 ) according to any one of the preceding claims, wherein at least one phosphor region ( 7 ) from a color filter ( 12 ), which has at least one short-wave wavelength range from that of this phosphor region ( 7 ) filtered out secondary light (Sr). Color wheel ( 2 ) according to any one of the preceding claims, wherein at least one phosphor region ( 6 ) from a color filter ( 11 ) is covered, which at least one long wavelength wavelength range from that of this phosphor range ( 6 ) filtered out secondary light (Sg). Color wheel ( 2 ) according to any one of the preceding claims, wherein at least one phosphor region ( 8th ) is not covered by a color filter. Color wheel ( 2 ) according to any one of the preceding claims, wherein the at least one phosphor region ( 6 - 8th ) between the carrier substrate ( 3 ) and a translucent filter substrate ( 10 ) is arranged and the at least one color filter as a filter area ( 11 . 12 ) in the filter substrate ( 10 ) is integrated. Color wheel ( 2 ) according to claim 6, wherein the filter substrate ( 10 ) with at least one optically transparent, thermally conductive layer ( 15 ) is coated. Color wheel ( 2 ) according to claim 6 or 7, wherein the carrier substrate ( 3 ) at the phosphor areas ( 6 - 8th ) for receiving the respective phosphor (Ph) a trough or depression ( 13 ) having. Color wheel ( 2 ) according to claim 8, wherein the phosphor (Ph) is the recess 13 completely filled. Color wheel ( 2 ) according to claim 8, wherein the filter substrate ( 10 ) flat on the carrier substrate ( 3 ) and with the exception of the phosphor areas ( 6 - 8th ) with the carrier substrate ( 3 ) is glued. Color wheel ( 2 ) according to one of the preceding claims, wherein the carrier substrate ( 3 ) at least one, not illuminated, externally illuminable reflection area or transmitted light area ( 9 ) having. Color wheel ( 2 ) according to one of the preceding claims, wherein - on the carrier substrate ( 3 ) at least one reflection area or transmitted light area ( 9 ), at least one red-converting phosphor region ( 7 ) and at least one green-converting phosphor region ( 6 ) are arranged; The red converting phosphor region ( 7 ) from a long-pass color filter ( 12 ) which filters out a short wavelength wavelength range from the secondary light (Sr) radiated from the red converting phosphor region; and - the green converting phosphor region ( 6 ) from a bandpasspass color filter ( 11 ) or short-pass color filter covering a long-wavelength region from the phosphor region ( 6 ) filtered out secondary light (Sg). Color wheel ( 2 ) according to one of the preceding claims, wherein on the carrier substrate ( 3 ) at least one yellow-converting phosphor region ( 8th ), which is not covered by a color filter. Lighting device ( 1 ), comprising at least one color wheel ( 2 ) according to one of the preceding claims and at least one primary light source (Q), in particular semiconductor light source, for irradiating the color wheel ( 2 ) with primary light (P), which by means of the at least one phosphor region ( 6 - 8th ) of the color wheel ( 2 ) is at least partially wavelength convertible.  A lighting device according to claim 14, wherein the primary light source (Q) radiates blue light.

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