CN109991803B - Color wheel assembly, light source device and projection system - Google Patents
Color wheel assembly, light source device and projection system Download PDFInfo
- Publication number
- CN109991803B CN109991803B CN201810006236.4A CN201810006236A CN109991803B CN 109991803 B CN109991803 B CN 109991803B CN 201810006236 A CN201810006236 A CN 201810006236A CN 109991803 B CN109991803 B CN 109991803B
- Authority
- CN
- China
- Prior art keywords
- light
- light source
- reflecting
- source device
- excitation
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F21—LIGHTING
- F21V—FUNCTIONAL FEATURES OR DETAILS OF LIGHTING DEVICES OR SYSTEMS THEREOF; STRUCTURAL COMBINATIONS OF LIGHTING DEVICES WITH OTHER ARTICLES, NOT OTHERWISE PROVIDED FOR
- F21V9/00—Elements for modifying spectral properties, polarisation or intensity of the light emitted, e.g. filters
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2033—LED or laser light sources
- G03B21/204—LED or laser light sources using secondary light emission, e.g. luminescence or fluorescence
Abstract
The present invention provides a color wheel assembly comprising: a carrier; the wavelength conversion element is fixed around the peripheral wall of the bearing piece and is used for receiving exciting light of the light source and generating stimulated light; and the filtering element is fixed on one end face of the bearing piece, extends around the circumference of the bearing piece and is used for receiving and filtering the received laser. The invention also provides a light source device comprising the color wheel assembly and a projection system. The color wheel assembly is simple in rotation control and small in size.
Description
Technical Field
The present invention relates to the field of optical technologies, and in particular, to a color wheel assembly, a light source device, and a projection system.
Background
At present, a spatial light modulator is widely applied in the field of projection display, the spatial light modulator generally comprises an LCD, an LCOS, a DMD and the like, a single-chip spatial light modulator projection system realizes color projection display based on time sequence switching primary color light, and the single-chip spatial light modulator is widely applied in middle and low end markets due to the characteristics of simple structure, low cost and the like. Because the spectral bandwidth of the excited light of the laser excited fluorescent powder is wide, a filter is usually added in the light source to intercept the required wavelength band, such as green light or red light from yellow fluorescent light.
In practical light sources, a dual color wheel or a single color wheel structure is generally adopted to filter the light spectrum of the fluorescent powder. The double-color wheel structure refers to a double-color wheel system of a fluorescent wheel and a filter wheel, but the fluorescent wheel and the filter wheel need to be synchronously controlled, so that the complexity of a light source is increased. The color wheel in the monochromatic wheel structure comprises an inner ring serving as a fluorescent area and an outer ring serving as a filter area, the synchronous problem of the fluorescent area and the filter area does not need to be considered in the structure, however, the width of the fluorescent area and the width of the filter area are overlapped in the radius direction of the color wheel, the outer diameter of the color wheel is large, and the light source is difficult to achieve miniaturization.
Disclosure of Invention
In view of the above, it is desirable to provide a light source device and a projection system of a miniaturized color wheel assembly.
The present invention provides a color wheel assembly comprising: a carrier; the wavelength conversion element is fixed around the peripheral wall of the bearing piece and is used for receiving exciting light of the light source and generating stimulated light; and the filtering element is fixed on one end face of the bearing piece, extends around the circumference of the bearing piece and is used for receiving and filtering the received laser.
The invention also provides a light source device, which comprises an excitation light source for generating excitation light and the color wheel assembly, wherein the wavelength conversion element is arranged in the transmission path of the excitation light and outputs the excitation light and the excitation light in a time sequence under the irradiation of the excitation light source.
The invention also provides a projection system comprising the light source device.
According to the color wheel assembly provided by the invention, the filtering element is arranged on the end face of the bearing part, and the wavelength conversion element is arranged on the peripheral wall of the bearing part in a surrounding manner, so that the radial size of the color wheel assembly is greatly reduced, the miniaturization is realized, and when the color wheel assembly is controlled to rotate, the filtering element and the wavelength conversion element are driven along with the driving of the bearing part, the synchronous control problem of the filtering wheel and the fluorescent wheel is not required to be considered, so that the driving control of the color wheel assembly is simpler.
Drawings
Fig. 1 is a schematic structural diagram of a light source device according to a first embodiment of the present invention.
Fig. 2 is a schematic diagram of the structure of the color wheel assembly shown in fig. 1.
Fig. 3 is a schematic structural diagram of a light source device according to a second embodiment of the present invention.
Fig. 4 is a schematic diagram of the structure of the color wheel assembly shown in fig. 3.
Fig. 5 is a schematic structural diagram of a light source device according to a third embodiment of the present invention.
Fig. 6 is a schematic diagram of the excitation light source, the turn-off timing of the compensation light source, and the distribution of the segment areas of the wavelength conversion element according to the embodiment of the invention.
Fig. 7 is a schematic structural diagram of a light source device according to a fourth embodiment of the present invention.
Fig. 8 is a schematic structural diagram of a light source device according to a fifth embodiment of the present invention.
Description of the main elements
The following detailed description will further illustrate the invention in conjunction with the above-described figures.
Detailed Description
In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention, but the present invention may be practiced in other ways than those specifically described and will be readily apparent to those of ordinary skill in the art without departing from the spirit of the present invention and the scope of the present invention is therefore not limited to the specific embodiments disclosed below.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a light source device 100 according to a first embodiment of the invention. The light source device 100 is applied to a projection device. The light source device 100 includes an excitation light source 120, an adjusting device, a color wheel assembly 160, and a first light homogenizing device 180. The excitation light source 120 is configured to generate excitation light of at least one color. The color wheel assembly 160 is configured to perform wavelength conversion on the excitation light and emit the excitation light and the excitation light in a time sequence. The adjusting device is configured to guide the stimulated light and the excitation light incident along the overlapped light path, adjust the stimulated light to a first divergence angle, and emit the stimulated light from the color wheel assembly 160, and emit the excitation light from the color wheel assembly 160 at a second divergence angle matching the first divergence angle. The overlapped light path means that the transmission light path of the excited light and the transmission light path of the exciting light are at least partially overlapped. The first light unifying means 180 unifies the excitation light and the excitation light emitted at divergence angles matched with each other.
Specifically, the excitation light source 120 includes a light emitter 121 for generating the excitation light and a second light uniformizing device 122 for uniformizing the excitation light.
Further, the excitation light source 120 may be a blue light source, and emit blue excitation light. It is understood that the excitation light source 120 is not limited to a blue light source, and the excitation light source 120 may be a violet light source, a red light source, a green light source, or the like. In this embodiment, the light emitter 121 is a blue laser and emits blue laser light as the excitation light. It is understood that the light emitter 121 may include one, two or more blue lasers, and the number of the lasers may be selected according to actual needs.
The second light uniformizing device 122 is located on an emergent light path of the light emitter 121, and is configured to uniformize the excitation light. In this embodiment, the second light unifying device 122 is a light unifying rod, and it should be understood that in other embodiments, the second light unifying device 122 may include a fly-eye lens, a light unifying rod, a diffuser or a scattering wheel, and the like, which is not limited thereto.
Referring to fig. 1 and fig. 2, fig. 2 is a schematic structural diagram of the color wheel assembly 160 shown in fig. 1. The color wheel assembly 160 includes a carrier 161, a first driver 163, a wavelength conversion element 165, and a filter element 167. The first driving member 163 is connected to the bearing 161, and is used for driving the bearing 161 to rotate around a predetermined rotation axis. The wavelength conversion element 165 is configured to receive the excitation light emitted from the excitation light source 120 and generate excited light, and is fixed around the circumferential wall of the carrier 161 to form a drum-type wavelength conversion structure. The filter element 167 is fixed to an end surface of the carrier 161 and extends around the circumference of the carrier 161 to receive and filter the laser beam.
The carrier 161 is substantially hollow cylindrical. The carrier 161 includes an end surface and a peripheral wall formed by extending the periphery of the end surface. The end face and the peripheral wall surround to form an accommodating cavity 162 for accommodating the first light homogenizing device 180. The end face of the carrier 161 is made of a transparent material, so that the excited light and the excitation light can penetrate through the carrier 161 and enter the first dodging device 180. The first driving member 163 is fixed to an end surface of the carrier 161. The first driving member 163 may be a motor or other driving device.
The wavelength conversion element 165 is disposed in a transmission path of the excitation light, and outputs the excitation light and the excitation light in a time series under irradiation of the excitation light source 120. In particular, the wavelength converting element 165 includes a circumferentially disposed conversion region 164 and a non-conversion region 166. The conversion regions 164 and the non-conversion regions 166 are alternately located on the optical path of the excitation light under the driving of the driving device, so that the color wheel assembly 160 sequentially emits the excited light subjected to wavelength conversion and the excitation light not subjected to wavelength conversion. The conversion area 164 and the non-conversion area 166 are respectively distributed in a square curved surface, and the outer surfaces of the conversion area 164 and the non-conversion area 166 are parallel to the central axis of the color wheel assembly 160. In this embodiment, the wavelength conversion element 165 is a reflective wavelength conversion element. By reflective wavelength converting element is meant that the outgoing light of the wavelength converting element 165 travels in the opposite direction to the incoming light.
Specifically, the conversion region 164 is provided with a wavelength conversion material to generate stimulated light in the form of lambertian light of at least one color under excitation by the excitation light. As shown in fig. 2, the transition region 164 is divided into a red region (R), a green region (G), and a yellow region (Y). The red area is provided with red fluorescent powder so as to generate red stimulated light under the excitation of the exciting light; the green area is provided with green fluorescent powder to generate green stimulated light under the excitation of the exciting light; and the yellow region is provided with yellow fluorescent powder so as to generate yellow stimulated light under the excitation of the exciting light. It is understood that the conversion region 164 may be provided with phosphors of other colors than red, green and yellow to generate stimulated light of other colors. The non-conversion region 166 is provided with a mirror or a small angle scattering plate, such as a gaussian reflector, for reflecting the excitation light. In this embodiment, the non-conversion region 166 is set as a blue region (B-mirror) for reflecting the blue excitation light. The red stimulated light, the green stimulated light, the yellow stimulated light and the blue excitation light form white light after being homogenized in the first light homogenizing device 180.
The filter element 167 has a substantially annular plate shape and includes a filter region 168 and a non-filter region 169. The filter area 168 and the non-filter area 169 are disposed in a fan-shaped ring respectively. It is understood that, in other embodiments, when the first driving member 163 is fixed on other portions of the carrier 161 where the filter element 167 is not disposed, the filter element 167 may be designed to be a disk shape, and the filter area 168 and the non-filter area 169 are respectively disposed in a fan shape. The filter area 168 corresponds to the converting area 164 and is used for filtering the excited light to improve the color purity of the primary color of the light source. The non-filter region 169 corresponds to the non-conversion region 166, and is configured to scatter the excitation light, expand the divergence angle of the excitation light, and make the excitation light emitted from the non-filter region 169 in lambert light distribution.
In particular, the filter regions 168 are provided with a filter material to filter the stimulated light in the form of lambertian light having at least one color. As shown in fig. 2, the filter area 168 is divided into a red area (R), a green area (G) and a yellow area (Y), and the red area, the green area and the yellow area of the filter area 168 correspond to the red area, the green area and the yellow area of the conversion area 164 one by one. A red filter is arranged in the red area to filter red laser light; a green filter is arranged in the green area to filter the green laser light; and a yellow filter is arranged in the yellow area to filter yellow stimulated light. It is understood that the conversion region 164 may be provided with filters of other colors than red, green and yellow to filter the excited light of other colors. The non-filter region 169 is provided with a scattering sheet or a single compound eye for enlarging the divergence angle of the excitation light emitted from the non-conversion region 166. In this embodiment, the non-filter area 169 is a blue area (B-buffer) for expanding the divergence angle of the blue excitation light.
When the first driving member 163 drives the carrier 161 to rotate, the primary light beams of the colors emitted from the converting region 164 and the excitation light beams emitted from the non-converting region 166 are sequentially incident on the filter region 168 and the non-filter region 169 of the corresponding color on the filter element 167, so that the primary light beams are sequentially combined into white light. Specifically, the angle of each segment region (for example, R, G, B, Y region) in the filter element 167 corresponding to the axis of the color wheel assembly 160 is equal to and coincides with the angle of each corresponding region (color corresponding region) in the wavelength conversion element 165 corresponding to the axis of the color wheel assembly 160, so that the stimulated light or the excitation light emitted from each segment region in the wavelength conversion element 165 can enter the corresponding region in the filter element 167 when the color wheel assembly 160 rotates.
The adjusting device includes a collecting lens 141, a light splitting and combining element 142, a first relay lens 143, a first reflecting element 144, a second reflecting element 145, a third reflecting element 146, and a second relay lens 149.
The main optical axis of the excitation light source 120 is parallel to but not coincident with the main optical axis of the collection lens 141 to distinguish the incident light path and the emergent light path of the excitation light on the non-conversion region 166. The excitation light emitted from the excitation light source 120 is converged by the collecting lens 141, then obliquely enters at a predetermined angle and converges on the surface of the wavelength conversion element 165, and is reflected by the non-conversion region 166 and then exits. Wherein, the incident light path of the excitation light incident to the non-conversion region 166 is not overlapped with the emergent light path of the excitation light reflected by the non-conversion region 166, and is symmetrically arranged along the main optical axis of the collecting lens 141.
The light splitting and combining element 142 may adopt an optical structure with a split wavelength, that is, light combining is performed according to different wavelength ranges of incident light. As an embodiment of wavelength splitting, the light splitting and combining element 142 is used for transmitting the excitation light and reflecting the stimulated light. Wherein the wavelength ranges of the excitation light and the excitation light are the same. Specifically, the light splitting and combining element 142 includes a first surface and a second surface that are disposed opposite to each other, and the excitation light emitted from the excitation light source 120 enters the light splitting and combining element 142 from the first surface and emits to the collecting lens 141 through the second surface. The excitation light and the stimulated light emitted from the wavelength conversion element 165 are collimated by the collecting lens 141 and then enter the second surface of the light splitting and combining element 142, wherein the excited light is reflected by the second surface of the light splitting and combining element 142, and the excitation light sequentially penetrates through the second surface and the first surface of the light splitting and combining element 142 and is emitted to the first reflecting element 144.
The first reflecting element 144 is configured to reflect the excitation light emitted from the first surface of the light splitting and combining element 142. The excitation light reflected by the first reflecting element 144 sequentially passes through the first surface and the second surface of the light splitting and combining element 142 to be emitted. The excited light and the excitation light emitted from the light splitting and combining element 142 are combined into one path on the second surface of the light splitting and combining element 142. At this time, the etendue of the excitation light is smaller than that of the stimulated light, and the angular distributions of the stimulated light and the excitation light do not match. In this embodiment, the first reflective element 144 is a plane mirror. It is understood that the first reflective element 144 may also be a convex mirror.
The stimulated light and the excitation light emitted from the light splitting and combining element 142 respectively enter the second relay lens 149 through the first relay lens 143, the second reflecting element 145 and the third reflecting element 146 in sequence, and enter the filter element 167 after being converged by the second relay lens 149, and then are coupled into the first dodging device 180. The first relay lens 143 is configured to guide light incident from the first side thereof to the second side thereof for emission, and the second relay lens 149 is configured to guide light incident from the first side thereof to the second side thereof for convergent emission. When the excitation light passes through the non-filter region 169, the excitation light is scattered, so that the divergence angle of the excitation light is enlarged, the excitation light is incident to the first light uniformizing device 180 at a second divergence angle matched with the first divergence angle of the stimulated light, that is, the excitation light and the stimulated light have mutually matched angular distributions at the inlet face of the first light uniformizing device 180, and the excitation light and the stimulated light are reflected for multiple times in the first light uniformizing device 180, so that the excitation light and the stimulated light emitted by the first light uniformizing device 180 are mixed more uniformly, and the uniformity of the light source is improved.
In the color wheel assembly 160 of the present embodiment, the filter element 167 is disposed on the end surface of the carrier 161, the width of the filter element 167 extends along the radial direction of the color wheel assembly 160, the wavelength conversion element 165 is disposed on the peripheral wall of the carrier 161 in a surrounding manner, and the width of the wavelength conversion element 165 extends along the axial direction of the color wheel assembly 160, so that the overall width of the color wheel assembly 160 is only contributed by the width of the filter element 167, and thus the radial dimension of the color wheel assembly 160 is greatly reduced, and miniaturization is achieved. Furthermore, when the color wheel assembly 160 is controlled to rotate, the filter element 167 and the wavelength conversion element 165 are driven along with the driving of the carrier 161, so that the problem of synchronous control of the filter wheel and the fluorescent wheel is not needed to be considered, and the driving control of the color wheel assembly 160 is simpler. In addition, after the laser is filtered by the filter area 168, the color purity of the primary color of the light source is improved; the excitation light is lossless in the light source device 100, its angular distribution is continuous, and after being scattered by the non-filter area 169, its angular distribution matches with that of the stimulated light, so that better uniformity is achieved.
Referring to fig. 3 and fig. 4, fig. 3 is a schematic structural diagram of a light source device 200 according to a second embodiment of the present invention, and fig. 4 is a schematic structural diagram of a color wheel assembly 260 shown in fig. 3. The light source device 200 of the present embodiment is different from the light source device 100 of the first embodiment in the positional relationship of the collecting lens and the excitation light source and the structure of the conversion region of the wavelength conversion element.
Specifically, the excitation light source 220 is coaxially disposed with the collecting lens 241; the outer surface of the non-conversion region 266 is disposed obliquely with respect to the central axis of the color wheel assembly 260. Excitation light emitted by the excitation light source 220 is incident on the non-conversion region 266 along the main optical axis of the collection lens 241, and is reflected back to the collection lens 241 in a tilted manner at a preset angle, so that the incident light path and the emergent light path of the excitation light on the non-conversion region 266 are not overlapped. The incident light path and the emergent light path are symmetrically arranged along the normal of the inclined plane of the non-conversion region 264.
In addition to the effects of the first embodiment, the light source device 200 of the present embodiment has an excitation light source 220 and a collecting lens 241 coaxially disposed, so that the excitation light is incident on the outer surface of the wavelength conversion element 265 along the main optical axis of the collecting lens 241. According to the aberration principle, the imaging aberration of the on-axis ray (zero field of view) is smaller than that of the off-axis ray (larger field of view). Therefore, the excitation light is incident along the main optical axis of the collecting lens 241, and a light spot with good imaging quality and uniform illumination intensity can be formed on the outer surface of the wavelength conversion element 265, so as to improve the excitation efficiency of the wavelength conversion material (e.g., phosphor) on the conversion region 264.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a light source device 300 according to a third embodiment of the invention. The light source device 300 of the present embodiment is different from the light source device of the second embodiment in that a compensation light source 330 for emitting compensation light having a different spectral range from that of the excitation light and a light combining element 345 for guiding the compensation light are added, and the second reflecting element is omitted.
In this embodiment, the compensating light source 330 may be a red or green light source, and emits red or green compensating light. It is understood that the compensating light source 330 is not limited to a red or green light source, but may be a violet light source, etc. Specifically, the compensating light source 330 includes a light emitter 331, a scattering element 332, a first lens 333, and a second lens 334. The light emitter 331 is configured to emit red or green compensation light, wherein the red compensation light and the green compensation light can be combined in parallel by the dichroic plate. It will be appreciated that the light 331 may include one, two or more red or green lasers. The compensating light is converged on the surface of the scattering element 332 by the first lens 333 and then dispersed, and the divergent compensating light is converged on the light combining element 345 by the second lens 334.
The scattering element 332 serves to homogenize, decoherence, and expand the divergence angle of the compensation light. The scattering element 332 includes a scattering wheel 335 and a second drive member 336. The second driving member 336 is connected to the scattering wheel 335 for driving the scattering wheel 335 to rotate around a predetermined rotation axis. The scattering wheel 335 rotates under the driving of the second driving member 336, which can eliminate the speckle phenomenon of the compensating light.
The light combining element 345 replaces the second reflecting element and is disposed at the position of the second reflecting element. The light combining element 345 includes a transmissive region and a reflective region. The transmission area is used for transmitting the compensation light, and the reflection area is used for reflecting the stimulated light and the exciting light. In this embodiment, the transmission region is provided with an antireflection film for a red light band or a green light band, and the reflection region is provided with a full-wave reflection film. The compensation light converges in the transmission region, and after passing through the transmission region, combines with the received laser light, and then sequentially passes through the third reflection element 346 and the second relay lens, and then exits to the filter element at a divergence angle matching the first divergence angle. The excitation light and the stimulated light emitted by the wavelength conversion element and the compensation light are combined into one path at the light combining element 345. The compensating light is converged in the transmission area, namely the light spot of the compensating light irradiated on the transmission area is small, so that the transmission area can transmit the compensating light by using a small area, and the loss of the excited light caused by the incident light into the transmission area can be reduced. The loss of the angular distribution of the stimulated light in the transmission area is compensated by the compensation light, so that the angular distribution of the stimulated light is still continuous, and the stimulated light and the exciting light can still be uniformly mixed in the first dodging device.
Referring to fig. 6, fig. 6 is a schematic diagram of the excitation light source, the turn-off timing of the compensation light source, and the distribution of the segment regions of the wavelength conversion device according to the embodiment of the invention. The conversion region of the wavelength conversion element is provided with a first wavelength conversion layer, and the first wavelength conversion layer emits first stimulated light under the irradiation of the exciting light. Wherein the first wavelength conversion layer is a wavelength conversion layer capable of converting excitation light into excited light having a spectrum overlapping with the compensation light. It is understood that the first wavelength conversion layer may be a segment region of a red region (R), a green region (G) and/or a yellow region (Y), and the first stimulated light may be red stimulated light, green stimulated light and/or yellow stimulated light.
When the light source is driven, the excitation light source is always in an on state, the compensation light source is turned on when a segment area provided with a first wavelength conversion layer in the conversion area is positioned in a transmission path of the excitation light source, and is turned off in other segment areas and non-conversion areas in the conversion area. Specifically, the excitation light source emits blue excitation light, and if the compensation light source is a red laser light source, when the excitation light source irradiates a red area (R) or a yellow area (Y) of the conversion area, the compensation light source is turned on; when the excitation light source irradiates a green area (G) or a non-conversion area (B-mirror) of the conversion area, the compensation light source is turned off. If the compensation light source is a green laser light source, when the excitation light source irradiates a green area (G) or a yellow area (Y) of the conversion area, the compensation light source is turned on; when the excitation light source irradiates a red area (R) or a non-conversion area (B-mirror) of the conversion area, the compensation light source is turned off.
The light source device 300 of the present embodiment has the efficacy of the light source device 200 of the second embodiment, and improves the brightness of the light source and the color purity of the primary color (red light or green light) by adding the compensation light source 330.
Referring to fig. 7, fig. 7 is a schematic structural diagram of a light source device 400 according to a fourth embodiment of the invention. The light source device 400 of the present embodiment is different from the light source device of the second embodiment in that a compensation light source 430 for emitting compensation light having a different spectral range from that of the excitation light and a light combining element 444 for guiding the compensation light are added, and the first reflecting element is omitted.
The structure of the compensation light source 430 is the same as that of the compensation light source 330 in the third embodiment, and is not described herein again.
The light combining element 444 replaces the first reflective element and is disposed at the position of the first reflective element. The compensation light emitted by the compensation light source 430 passes through the light combining element 444 and then converges at the light splitting and combining element 442, and the compensation light passing through the light splitting and combining element 442 passes through the first relay lens, the second reflecting element, the third reflecting element and the second relay lens in sequence and then exits to the filter element at a divergence angle matched with the first divergence angle. The excitation light and the stimulated light emitted from the wavelength conversion element and the compensation light are combined into one path at the light splitting and combining element 442. Specifically, the light combining element 444 is configured to transmit the compensation light and reflect the excitation light, and the light splitting and combining element 442 includes a transmission region configured to transmit the compensation light and a light combining region configured to reflect the stimulated light and transmit the excitation light. The transmission area is provided with a full-wave-band antireflection film, and the light combination area is provided with a blue-transmitting and yellow-reflecting dichroic film.
Referring to fig. 8, fig. 8 is a schematic structural diagram of a light source device 500 according to a fifth embodiment of the present invention. The light source device 500 of the present embodiment is different from the light source device of the second embodiment in that a compensation light source 530 for emitting compensation light having a different spectral range from that of the excitation light and a light combining element 546 for guiding the compensation light are added, and the third reflective element is omitted.
The light combining element 546 replaces the third reflective element and is disposed at the position of the third reflective element. The compensation light emitted by the compensation light source 530 is converged by the second relay lens through the light combining element 546, and then exits to the filter element at a divergence angle matched with the first divergence angle. The excitation light and the stimulated light emitted by the wavelength conversion element and the compensation light are combined into one path at the light combining element 546. Specifically, the light combining element 546 includes a transmission region for transmitting the compensation light and a reflection region for reflecting the stimulated light and the excitation light. The transmission region is provided with an antireflection film aiming at a red light or green light wave band, and the reflection region is provided with a full-wave reflection film.
The scattering wheel 535 and the bearing member of the color wheel assembly 560 are respectively connected to a second driving member 563, and the second driving member 563 can simultaneously drive the scattering wheel 535 and the bearing member to rotate around a predetermined rotation axis.
In addition to the efficacy of the light source apparatus 300 in the third embodiment, the light source apparatus 500 of the present embodiment can omit the driving device (first driving member) in the color wheel assembly 560 because the scattering wheel 535 and the supporting member are driven by the second driving member 563 at the same time, thereby simplifying the structure. In addition, the compensation light source 530 is disposed adjacent to the filter element, and the compensation light emitted by the compensation light source 530 can be emitted to the filter element only after passing through the light combining element 546 and the second relay lens, so that the number of optical devices through which the compensation light passes is small in the embodiment, and the utilization rate of the compensation light can be improved.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (18)
1. A color wheel assembly, comprising:
the bearing piece comprises an end face and a peripheral wall formed by extending the periphery of the end face, and the end face and the peripheral wall surround to form an accommodating cavity;
the wavelength conversion element is fixed around the peripheral wall of the bearing piece and is used for receiving exciting light of the light source and generating stimulated light; and
the optical filtering element is fixed on one end face of the bearing piece and extends around the circumference of the bearing piece and is used for receiving and filtering the received laser, and the projection of the optical filtering element along the axis of the color wheel assembly completely falls into the end face of the bearing piece.
2. A light source device, comprising:
an excitation light source for generating excitation light; and
the color wheel assembly of claim 1, wherein the wavelength conversion element is disposed in a transmission path of the excitation light and outputs the excitation light and the excitation light in a time sequence under irradiation of the excitation light source.
3. The light source device according to claim 2, wherein the wavelength conversion element includes a conversion region and a non-conversion region which are circumferentially arranged, the conversion region being configured to wavelength-convert the excitation light and emit an excited light; the filter element comprises a filter area and a non-filter area, the filter area corresponds to the conversion area and is used for filtering the excited light, and the non-filter area corresponds to the non-conversion area and is used for enlarging the divergence angle of the excited light emitted by the non-conversion area.
4. The light source device according to claim 3, wherein the filter region and the non-filter region are respectively disposed in a fan-ring shape or a fan shape.
5. The light source device according to claim 3, further comprising an adjusting device including a light splitting and combining element, a collecting lens, a first relay lens and a second relay lens, wherein the excitation light and the stimulated light emitted from the wavelength conversion element sequentially pass through the collecting lens, the light splitting and combining element, the first relay lens and the second relay lens respectively and then are emitted to the corresponding non-filter region and the corresponding filter region, and the excitation light and the stimulated light emitted from the wavelength conversion element are combined into a single path at the light splitting and combining element.
6. The light source device according to claim 5, wherein the adjusting means further comprises:
the first reflecting element is used for emitting the exciting light emitted by the wavelength conversion element to the first reflecting element through the collecting lens and the light splitting and combining element in sequence and reflecting the exciting light to the light splitting and combining element through the first reflecting element, so that the exciting light emitted by the wavelength conversion element and the received laser are combined into one path at the light splitting and combining element;
the second reflecting element is used for reflecting the exciting light and the stimulated light emitted by the first relay lens; and
and a third reflecting element for reflecting the excitation light and the stimulated light emitted by the second reflecting element to the second relay lens.
7. The light source device of claim 5, wherein a main optical axis of the excitation light source is parallel to but not coincident with a main optical axis of the collection lens, and an outer surface of the non-conversion region is parallel to a central axis of the color wheel assembly.
8. The light source device of claim 5, wherein the excitation light source is disposed coaxially with the collection lens, and an outer surface of the non-conversion region is disposed obliquely with respect to a central axis of the color wheel assembly.
9. The light source device according to claim 5, further comprising a compensation light source for emitting compensation light having a spectral range different from that of the excitation light, the compensation light being condensed by the second relay lens and then emitted to the filter element.
10. The light source device of claim 9, wherein the adjusting means further comprises:
the first reflecting element is arranged adjacent to the light splitting and combining element and is used for reflecting the exciting light emitted by the wavelength conversion element;
the second reflecting element is used for reflecting the exciting light and the stimulated light emitted by the first relay lens; and
and the light combining element comprises a transmission area and a reflection area, the transmission area is used for transmitting the compensation light, the reflection area is used for reflecting the excitation light and the received laser light emitted by the second reflection element, and the compensation light, the excitation light and the received laser light are combined into one path at the light combining element and then emitted to the second relay lens.
11. The light source device according to claim 10, wherein the compensation light source comprises a light emitter, a scattering device and two lenses, and compensation light emitted from the light emitter is converged by one lens to the scattering device and then converged by the other lens to the transmission region.
12. The light source device according to claim 11, wherein the scattering device comprises a scattering wheel for scattering the compensation light, and a driving member for driving the scattering wheel to rotate around a predetermined rotation axis.
13. The light source device of claim 12, wherein the scattering wheel and the carrier are connected to the driving member, respectively.
14. The light source device of claim 9, wherein the adjusting means further comprises:
the first reflecting element is arranged adjacent to the light splitting and combining element and is used for reflecting the exciting light emitted by the wavelength conversion element;
the light combining element is used for transmitting the compensation light and reflecting the excitation light and the stimulated light emitted by the first relay lens, wherein the compensation light, the excitation light and the stimulated light are combined into one path at the light combining element; and
and the third reflecting element is used for reflecting the compensating light, the exciting light and the stimulated light emitted by the light combination element to the second relay lens.
15. The light source device of claim 9, wherein the adjusting means further comprises:
the light combining element is arranged adjacent to the light splitting and light combining element and used for transmitting the compensation light and reflecting the excitation light emitted by the wavelength conversion element, wherein the compensation light, the excitation light and the received laser light are combined into one path at the light splitting and light combining element and then emitted to the first relay lens;
the second reflecting element is used for reflecting the compensating light, the exciting light and the stimulated light emitted by the first relay lens;
and the third reflecting element is used for reflecting the compensating light, the exciting light and the stimulated light emitted by the second reflecting element to the second relay lens.
16. The light source device according to any one of claims 9 to 15, wherein the conversion region is provided with a first wavelength conversion layer, the excitation light source is always on, the compensation light source is turned on when a region of the conversion region provided with the first wavelength conversion layer, which is a wavelength conversion layer that can convert excitation light into excited light having a spectral overlap with the compensation light, is located in a transmission path of the excitation light source, and is turned off in other regions of the conversion region and the non-conversion region.
17. The light source device according to claim 2, wherein the light source device further comprises a first light unifying device, and the first light unifying device is accommodated in the accommodating cavity.
18. A projection system comprising the light source device of any one of claims 2-17.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006236.4A CN109991803B (en) | 2018-01-03 | 2018-01-03 | Color wheel assembly, light source device and projection system |
| PCT/CN2018/080869 WO2019134261A1 (en) | 2018-01-03 | 2018-03-28 | Color wheel assembly, light source apparatus, and projection system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006236.4A CN109991803B (en) | 2018-01-03 | 2018-01-03 | Color wheel assembly, light source device and projection system |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109991803A CN109991803A (en) | 2019-07-09 |
| CN109991803B true CN109991803B (en) | 2022-02-22 |
Family
ID=67128477
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810006236.4A Active CN109991803B (en) | 2018-01-03 | 2018-01-03 | Color wheel assembly, light source device and projection system |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN109991803B (en) |
| WO (1) | WO2019134261A1 (en) |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112987468A (en) * | 2019-12-16 | 2021-06-18 | 无锡视美乐激光显示科技有限公司 | Fluorescent roller module, light source and projector |
| CN113132698A (en) * | 2019-12-31 | 2021-07-16 | 深圳光峰科技股份有限公司 | Light source device and projection apparatus |
| CN114441487B (en) * | 2020-11-04 | 2023-11-03 | 致茂电子(苏州)有限公司 | Fluorescence detection system |
| CN114911119A (en) * | 2021-02-09 | 2022-08-16 | 苏州佳世达光电有限公司 | Light source module |
| TWI777575B (en) * | 2021-05-25 | 2022-09-11 | 台達電子工業股份有限公司 | Coaxial laser light source apparatus |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0945284A (en) * | 1995-08-03 | 1997-02-14 | Toshiba Lighting & Technol Corp | Fluorescent lamp, light source device, liquid-crystal display device, and reader |
| JP2006067173A (en) * | 2004-08-26 | 2006-03-09 | Ushio Inc | Original lighting system |
| CN102566230A (en) * | 2010-12-08 | 2012-07-11 | 绎立锐光科技开发(深圳)有限公司 | Projection system, light source system and light source component |
| CN102722014A (en) * | 2012-05-23 | 2012-10-10 | 深圳市绎立锐光科技开发有限公司 | Color wheel and light-emitting device |
| CN104020633A (en) * | 2013-02-28 | 2014-09-03 | 深圳市绎立锐光科技开发有限公司 | Light emitting device and related projection system |
| CN104566229A (en) * | 2013-10-15 | 2015-04-29 | 深圳市光峰光电技术有限公司 | Manufacturing method of wavelength conversion device |
| JP2015094824A (en) * | 2013-11-11 | 2015-05-18 | 株式会社リコー | Optical element, light source device, illumination optical system, and image display device |
| CN205539893U (en) * | 2016-01-14 | 2016-08-31 | 深圳市光峰光电技术有限公司 | Wavelength converters , light source system and projection arrangement |
| CN205992115U (en) * | 2016-08-09 | 2017-03-01 | 深圳市绎立锐光科技开发有限公司 | Light-source system and projector equipment |
| CN206671745U (en) * | 2017-03-14 | 2017-11-24 | 深圳市光峰光电技术有限公司 | Light supply apparatus and optical projection system |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4816755B2 (en) * | 2009-04-02 | 2011-11-16 | セイコーエプソン株式会社 | Light source device and projector |
| CN102854723B (en) * | 2012-01-07 | 2015-02-04 | 深圳市光峰光电技术有限公司 | Light-emitting device and projection apparatus |
-
2018
- 2018-01-03 CN CN201810006236.4A patent/CN109991803B/en active Active
- 2018-03-28 WO PCT/CN2018/080869 patent/WO2019134261A1/en active Application Filing
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0945284A (en) * | 1995-08-03 | 1997-02-14 | Toshiba Lighting & Technol Corp | Fluorescent lamp, light source device, liquid-crystal display device, and reader |
| JP2006067173A (en) * | 2004-08-26 | 2006-03-09 | Ushio Inc | Original lighting system |
| CN102566230A (en) * | 2010-12-08 | 2012-07-11 | 绎立锐光科技开发(深圳)有限公司 | Projection system, light source system and light source component |
| CN102722014A (en) * | 2012-05-23 | 2012-10-10 | 深圳市绎立锐光科技开发有限公司 | Color wheel and light-emitting device |
| CN104020633A (en) * | 2013-02-28 | 2014-09-03 | 深圳市绎立锐光科技开发有限公司 | Light emitting device and related projection system |
| CN104566229A (en) * | 2013-10-15 | 2015-04-29 | 深圳市光峰光电技术有限公司 | Manufacturing method of wavelength conversion device |
| JP2015094824A (en) * | 2013-11-11 | 2015-05-18 | 株式会社リコー | Optical element, light source device, illumination optical system, and image display device |
| CN205539893U (en) * | 2016-01-14 | 2016-08-31 | 深圳市光峰光电技术有限公司 | Wavelength converters , light source system and projection arrangement |
| CN205992115U (en) * | 2016-08-09 | 2017-03-01 | 深圳市绎立锐光科技开发有限公司 | Light-source system and projector equipment |
| CN206671745U (en) * | 2017-03-14 | 2017-11-24 | 深圳市光峰光电技术有限公司 | Light supply apparatus and optical projection system |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109991803A (en) | 2019-07-09 |
| WO2019134261A1 (en) | 2019-07-11 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN109991803B (en) | Color wheel assembly, light source device and projection system | |
| CN109991801B (en) | Color wheel assembly, light source device and projection system | |
| CN109557752B (en) | Light source system and projection device | |
| EP2960575B1 (en) | Illumination apparatus and projection-type image display apparatus having the same | |
| US9325955B2 (en) | Light source apparatus and projector apparatus with optical system having reduced color irregularity | |
| US9488849B2 (en) | Coherent light source device and projector | |
| US20180172978A1 (en) | Projection system, light source system and light source assembly | |
| CN109557751B (en) | Light source system and projection system using same | |
| WO2014196020A1 (en) | Illumination optical system and projector | |
| CN109765745B (en) | Light source device and projection system | |
| US20200064719A1 (en) | Light source device and image display apparatus | |
| CN113050354B (en) | Light source assembly and projection device | |
| CN110389488B (en) | Light source system and projection equipment | |
| CN111077720B (en) | Light source system and display device | |
| US20190072839A1 (en) | Color wheel and laser projection apparatus | |
| WO2020057299A1 (en) | Light source system and projection equipment | |
| CN110874005B (en) | Light source system, method for improving light efficiency of light source system and display device | |
| US20180095353A1 (en) | Projector and image display method | |
| JP2015206888A (en) | Light source device and image display device | |
| CN109991800B (en) | Light source device and projection system | |
| CN111856860A (en) | Light source system and display device | |
| CN110618575A (en) | Illumination system and projection device | |
| CN216210438U (en) | Light source assembly and projection device | |
| CN111722462A (en) | Illumination system and projection device | |
| WO2021259268A1 (en) | Light source assembly and projection device |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |