Laser light source system and projection equipment

Abstract

The invention provides a laser light source system and projection equipment. The laser light source system comprises a laser light source, a fluorescent wheel and a color filter wheel, the fluorescent wheel comprises at least one first area arranged in the circumferential direction, the first area is a fluorescent area, the color filter wheel comprises at least one second area arranged in the circumferential direction, and the second area is a light filter area arranged corresponding to the first area; wherein when the rotating speed of the color filter wheel is larger than that of the fluorescent wheel, and the rotating speed of the color filter wheel is m times of that of the fluorescent wheel, the number of the second areas is 1 / m of that of the first areas, and the ratio of the circle center angle of each second area on the color filter wheel is m times of the ratio of the circle center angle of the corresponding first area on the fluorescent wheel. In this way, under the condition that the rotating speed of the color filter wheel is larger than that of the fluorescent wheel, synchronous switching of the second area on the color filter wheel and the first area on the fluorescent wheel is achieved, the color mixing time is shortened, and the display effect is improved.

Description

Technical Field

[0001] The present disclosure relates to the field of laser projection technology, and in particular to a laser light source system and a projection device. Background Art

[0002] Laser light source is an electric light source that uses excited particles to emit light under stimulated radiation. It has the characteristics of good monochromaticity, strong directionality and high brightness, and is widely used in projection display equipment. Existing laser light source systems usually use lasers to illuminate a fluorescent wheel to stimulate the output of different colors of light. The color light output by the fluorescent wheel is filtered by a color filter wheel and then enters a uniform light integrator, which is then sequentially illuminated to the imaging component to output a display image.

[0003] The existing fluorescent wheel and color filter wheel have multiple partitions, and there are obvious boundaries between adjacent partitions. There will also be corresponding boundaries when light of different colors is output. However, in actual applications, the light spot has a certain size. When the light spot passes through the boundary between adjacent partitions of the color wheel (a general term for the fluorescent wheel and the color filter wheel), it will be irradiated on the boundary. At this time, since the light spot is located on two partitions and the colors of the light emitted by the two partitions are different, there is a situation where the colors of the emitted light are mixed after the light spot passes through the boundary between the two partitions, that is, mixed color light is generated. The existence of this mixed color light will affect the display effect of the laser optical system.

[0004] In the related art, a 240Hz motor is used to increase the rotation speed of the fluorescent wheel and the color filter wheel to reduce the mixed color light. However, because the fluorescent wheel needs high laser power to excite and convert into fluorescence, it needs a larger structure size to achieve heat dissipation. The 240Hz motor drives the fluorescent wheel to rotate at a speed of 14,400 revolutions per minute, which will cause serious noise problems, and the motor load and structural design are also limited. Summary of the invention

[0005] In order to solve the above technical problems or at least partially solve the above technical problems, the present disclosure provides a laser light source system and a projection device.

[0006] The present disclosure provides a laser light source system, comprising:

[0007] Laser light source;

[0008] A fluorescent wheel, arranged in the optical path of the laser light source, the fluorescent wheel comprising at least one first area arranged along a circumferential direction, the first area being a fluorescent area;

[0009] A color filter wheel is arranged on the output light path of the fluorescent wheel, wherein the color filter wheel comprises at least one second area arranged along a circumferential direction, and the second area is a filter area arranged corresponding to the first area;

[0010] Among them, when the rotation speed of the color filter wheel is m times the rotation speed of the fluorescent wheel, the number of the second areas is 1 / m of the number of the first areas, and the center angle occupancy of each second area on the color filter wheel is m times the center angle occupancy of the corresponding first area on the fluorescent wheel, where m is a positive rational number greater than 1.

[0011] Optionally, the first region includes at least two first sub-regions arranged along a circumferential direction, and two adjacent first sub-regions are fluorescent regions of different colors;

[0012] The second region includes at least two second sub-regions arranged along a circumferential direction, two adjacent second sub-regions are filter regions of different colors, and the second sub-regions are arranged in a one-to-one correspondence with the first sub-regions.

[0013] Optionally, one of two adjacent first sub-areas is a yellow fluorescent area, and the other is a green fluorescent area;

[0014] One of two adjacent second sub-areas is a red filter area, and the other is a green filter area. The yellow fluorescent area is arranged correspondingly to the red filter area, and the green fluorescent area is arranged correspondingly to the green filter area.

[0015] Optionally, the rotation speed of the color filter wheel is twice the rotation speed of the fluorescent wheel;

[0016] The number of the first regions is two, the number of the second region is one, and the proportion of the center angle of each first region on the fluorescent wheel is 1 / 2 of the proportion of the center angle of the second region on the color filter wheel.

[0017] Optionally, a first marking point is provided on the fluorescent wheel, and a second marking point is correspondingly provided on the color filter wheel;

[0018] When the first marking point and the second marking point overlap at a preset position and reach the next overlap, the number of revolutions of the color filter wheel is m times the number of revolutions of the fluorescent wheel.

[0019] Optionally, the laser light source system further includes a first drive motor and a second drive motor;

[0020] The first driving motor is connected to the fluorescent wheel and is used to drive the fluorescent wheel to rotate, and the second driving motor is connected to the color filter wheel and is used to drive the color filter wheel to rotate;

[0021] Wherein, when the rotation speed of the color filter wheel is twice the rotation speed of the fluorescent wheel, the output frequency of the first driving motor is 120 Hz, and the output frequency of the second driving motor is 240 Hz.

[0022] Optionally, the fluorescent wheel further includes a laser scattering region, and the color filter wheel further includes a transmission region corresponding to the laser scattering region, and when the number of the first regions is greater than or equal to two, the laser scattering region is located between two of the first regions.

[0023] Optionally, the laser light source system further comprises a light path guiding device, wherein the light path guiding device is used to guide the light emitted by the laser light source to enter the color filter wheel via the fluorescent wheel;

[0024] Among them, the light path guiding device includes a fluorescent reflector, an optical circuit unit and two groups of lens assemblies, the two groups of lens assemblies are respectively arranged on both sides of the fluorescent wheel, the fluorescent reflector and the optical circuit unit are respectively arranged on both sides of the fluorescent wheel, the fluorescent reflector reflects the color light emitted by the fluorescent area of ​​the fluorescent wheel to the filtering area of ​​the color filter wheel, and the optical circuit unit guides the color light transmitted by the laser scattering area to the transmission area of ​​the color filter wheel.

[0025] Optionally, the laser light source system further includes a light homogenizing component, which is disposed on an output light path of the color filter wheel and is used to receive the color light output after being filtered by the color filter wheel.

[0026] The present disclosure further provides a projection device, comprising a light valve, a lens assembly and a laser light source system as described in any one of the above items, wherein light emitted by the laser light source system enters the lens assembly after being modulated by the light valve.

[0027] Compared with the prior art, the technical solution provided by the present invention has the following advantages:

[0028] The laser light source system and projection device provided by the present disclosure arrange a fluorescent wheel and a color filter wheel on the propagation path of the laser light source, the fluorescent wheel is provided with at least one first area arranged along the circumferential direction, the first area is a fluorescent area; the color filter wheel is provided with at least one second area arranged along the circumferential direction, the second area is a filter area arranged corresponding to the first area, so as to output light of different colors in a timely manner through the color filter wheel; wherein, when the rotation speed of the color filter wheel is greater than the rotation speed of the fluorescent wheel, and the rotation speed of the color filter wheel is m times the rotation speed of the fluorescent wheel, the number of the second areas is 1 / m of the number of the first areas, and the proportion of the center angle of each second area on the color filter wheel is m times the proportion of the center angle of the first area on the fluorescent wheel , wherein m is a positive rational number greater than 1. With such an arrangement, when the rotation speed of the color filter wheel is greater than the rotation speed of the fluorescent wheel, that is, when only the rotation speed of the color filter wheel is increased without changing the rotation speed of the fluorescent wheel, the second area on the color filter wheel and the first area on the fluorescent wheel can be synchronously switched, and by increasing the rotation speed of the color filter wheel, the time taken for the light spot to pass through the boundary between adjacent partitions on the color filter wheel can be reduced, thereby shortening the color mixing time, reducing the mixed light, and further improving the display effect of the laser optical system; and because only the rotation speed of the color filter wheel is increased without changing the rotation speed of the fluorescent wheel, the problems of heat dissipation difficulty or severe noise of the fluorescent wheel caused by increasing the rotation speed of the fluorescent wheel can be effectively avoided. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present disclosure and, together with the description, serve to explain the principles of the present disclosure.

[0030] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0031] Figure 1 A schematic diagram of a laser light source system according to an embodiment of the present disclosure;

[0032] Figure 2 This is a front view of the fluorescent wheel according to the embodiment of the present disclosure;

[0033] Figure 3 It is a front view of the color filter wheel described in the embodiment of the present disclosure;

[0034] Figure 4 It is a side view of the fluorescent wheel according to the embodiment of the present disclosure;

[0035] Figure 5 A side view of the color filter wheel according to an embodiment of the present disclosure;

[0036] Figure 6 It is a schematic diagram of the combination of the fluorescent wheel and the lens assembly according to the embodiment of the present disclosure;

[0037] Figure 7 It is a schematic diagram of the combination of the fluorescent wheel and the optical circuit according to the embodiment of the present disclosure;

[0038] Figure 8 A schematic diagram of a focusing component according to an embodiment of the present disclosure;

[0039] Fig. 9 is a schematic diagram of the fluorescent reflector described in the embodiment of the present disclosure;

[0040] Fig.10 It is a schematic diagram of the projection display system described in an embodiment of the present disclosure.

[0041] Among them, 1. laser light source; 2. conversion component; 21. fluorescent wheel; 211. first blue light area; 212. first red light area; 213. first green light area; 22. first drive motor; 3. filter component; 31. color filter wheel; 311. second blue light area; 312. second red light area; 313. second green light area; 32. second drive motor; 4. light homogenization component; 51. fluorescent reflector; 52. lens assembly; 53. reflector; 54. focusing component; 100. laser system; 200. light valve; 300. lens assembly;

[0042] Figure 1 , Figures 6 to 10 The direction indicated by the arrow is the direction of light propagation. DETAILED DESCRIPTION

[0043] In order to more clearly understand the above-mentioned objectives, features and advantages of the present disclosure, the scheme of the present disclosure will be further described below. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0044] In the following description, many specific details are set forth to facilitate a full understanding of the present disclosure, but the present disclosure may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present disclosure, rather than all of the embodiments.

[0045] Reference Figures 1 to 10 As shown, an embodiment of the present disclosure provides a laser light source system, including: a laser light source 1, a fluorescent wheel 21 and a color filter wheel 31.

[0046] Specifically, the fluorescent wheel 21 is arranged on the optical path of the laser light source 1, and the fluorescent wheel 21 includes at least one first area arranged along the circumferential direction, and the first area is a fluorescent area. Specifically, the first area may include a fluorescent area of ​​one color, or the first area may include a fluorescent area capable of emitting one color of fluorescence; the first area may also include fluorescent areas of multiple different colors, or the first area may also include fluorescent areas capable of emitting different colors of fluorescence to output colored light of different colors; the color filter wheel 31 is arranged on the output optical path of the fluorescent wheel 21, and the color filter wheel 31 includes at least one second area arranged along the circumferential direction, and the second area is a filter area arranged corresponding to the first area, and the filter area is used to filter the colored light emitted by the fluorescent area, so as to output colored light of different colors in a timely manner through the color filter wheel 31.

[0047] Among them, when the rotation speed of the color filter wheel 31 is m times the rotation speed of the fluorescent wheel 21, the number of second areas is 1 / m of the number of first areas, and the center angle ratio of each second area on the color filter wheel 31 is m times the center angle ratio of the corresponding first area on the fluorescent wheel 21, where m is a positive rational number greater than 1.

[0048] That is to say, the rotation speed of the color filter wheel 31 is greater than the rotation speed of the fluorescent wheel 21, and the ratio of the rotation speed of the color filter wheel 31 to the rotation speed of the fluorescent wheel 21 is m, the ratio of the number of first areas on the fluorescent wheel 21 to the number of second areas on the color filter wheel 31 is also m, and the ratio of the center angle ratio of each second area on the color filter wheel 31 to the center angle ratio of the corresponding first area on the fluorescent wheel 21 is also m. In this way, when the rotation speed of the color filter wheel 31 is greater than the rotation speed of the fluorescent wheel 21, and the rotation speed of the color filter wheel 31 is m times the rotation speed of the fluorescent wheel 21, the second area on the color filter wheel 31 and the first area on the fluorescent wheel 21 can be switched synchronously, that is, the purpose of synchronous different speeds is achieved, so that by increasing the rotation speed of the color filter wheel 31, the time for the light spot to pass through the boundary of two adjacent partitions on the color filter wheel 31 is shortened, thereby shortening the color mixing time, reducing mixed light, and improving the display effect of the laser optical system.

[0049] It should be noted that m can be a positive integer greater than 1, but is not limited to being a positive integer greater than 1.

[0050] Exemplarily, when the number of the first regions of the fluorescent wheel 21 is an integer multiple (such as 2 times, 3 times) of the number of the second regions of the color filter wheel 31, the rotation speed of the color filter wheel 31 is an integer multiple (correspondingly, such as 2 times, 3 times) of the rotation speed of the fluorescent wheel 21. For example, when the number of the first regions of the fluorescent wheel 21 is 2 and the number of the second regions of the color filter wheel 31 is 1, the number of the first regions of the fluorescent wheel 21 is twice the number of the second regions of the color filter wheel 31, and accordingly, the rotation speed of the color filter wheel 31 is twice the rotation speed of the fluorescent wheel 21.

[0051] Exemplarily, when the number of the first regions of the fluorescent wheel 21 is a non-integer multiple (such as 1.5 times, 2.5 times) of the number of the second regions of the color filter wheel 31, the rotation speed of the color filter wheel 31 is a non-integer multiple (correspondingly, such as 1.5 times, 2.5 times) of the rotation speed of the fluorescent wheel 21. For example, the number of the first regions of the fluorescent wheel 21 is 3, the number of the first regions of the color filter wheel 31 is 2, the number of the first regions of the fluorescent wheel 21 is 1.5 times the number of the second regions of the color filter wheel 31, and accordingly, the rotation speed of the color filter wheel 31 is 1.5 times the rotation speed of the fluorescent wheel 21.

[0052] Specifically, the laser light source 1 can be selected as a monochromatic light source, or the laser light source 1 can be selected as a blue light source. The wavelength of the blue light source is small, which is conducive to irradiating the fluorescent wheel 21 and exciting the output of a color light different from the color of the laser light source 1. Of course, the laser light source 1 can also be selected as a yellow light source. The fluorescent area in the first area can be selected as an area for setting fluorescent powder. The fluorescent powder will be excited to emit a color light different from the color of the laser light source after being irradiated by the laser. The filter area in the second area is used to filter the color light emitted by the fluorescent powder when excited by the laser, and output the filtered color light; specifically, the color of the fluorescence emitted by the fluorescent area can be the same as the color of the color light emitted by the filter area after filtering, for example, the fluorescent area is a red fluorescent area, and correspondingly, the filter area emits red light after filtering; the color of the fluorescence emitted by the fluorescent area can also be different from the color of the color light emitted by the filter area after filtering, for example, the fluorescent area is a yellow fluorescent area, and correspondingly, the filter area emits red light after filtering.

[0053] The first area can be selected to include at least two fluorescent areas that can output light of different colors respectively, and correspondingly, the second area includes at least two filter areas that can filter the fluorescence of different colors emitted from the first area respectively. The second area corresponds to the first area, that is, the first area receives the irradiation of the laser light source 1 and outputs the color light, and the second area receives and filters the color light output by the first area. During the rotation of the fluorescent wheel 21 and the color filter wheel 31, when the fluorescent wheel 21 rotates until the light spot just enters the first area, the color filter wheel 31 also rotates until the light spot just enters the second area; when the fluorescent wheel 21 rotates until the light spot just leaves the first area, the color filter wheel 31 also rotates until the light spot just leaves the second area, so that the two are synchronized at different speeds.

[0054] The fluorescent wheel 21 can be driven by a motor or an electric motor to rotate. When there is one first area, the entire area of ​​the fluorescent wheel 21 can be selected as the first area, or a part of the area of ​​the fluorescent wheel 21 can be selected as the first area. Correspondingly, when there is one second area, the entire area of ​​the color filter wheel 31 can be selected as the second area, or a part of the area of ​​the fluorescent wheel 21 can be selected as the second area, as long as the second area corresponds to the first area. When there are two or more first areas, the plurality of first areas are arranged along the circumference of the fluorescent wheel 21, and the laser light source 1 is vertically irradiated on the fluorescent wheel 21, so that the laser light source 1 irradiates different positions of the first area through the rotation of the disk and outputs color light accordingly; the color filter wheel 31 can be driven by a motor or an electric motor to rotate, and the color light output from the first area is vertically irradiated on the color filter wheel 31. The rotation of the color filter wheel 31 causes the color light output from the fluorescent wheel 21 to irradiate different positions of the second area, so that the filter area of ​​the second area of ​​the color filter wheel 31 corresponds to filtering the color light emitted from the first area of ​​the fluorescent wheel 21.

[0055] It should be noted that the center angle proportion of the second area in the color filter wheel 31 is the ratio of the center angle of the second area to 360°, and the center angle proportion of the first area in the fluorescent wheel 21 is the ratio of the center angle of the first area to 360°.

[0056] The laser light source system provided by the embodiment of the present disclosure sets the rotation speed of the color filter wheel 31 to be greater than the rotation speed of the fluorescent wheel 21, and when the rotation speed of the color filter wheel 31 is greater than the rotation speed of the fluorescent wheel 21 and the rotation speed of the color filter wheel 31 is m times the rotation speed of the fluorescent wheel 21, sets the number of filter areas on the color filter wheel 31 to be 1 / m of the number of fluorescent areas on the fluorescent wheel 21, and the proportion of the center angle of each second area on the color filter wheel 31 is m times the proportion of the center angle of the first area on the fluorescent wheel 21, so that the synchronous switching of the second area on the color filter wheel 31 and the first area on the fluorescent wheel 21 can be achieved, that is, only when the rotation speed of the color filter wheel 31 is greater than the rotation speed of the fluorescent wheel 21, the second area on the color filter wheel 31 and the first area on the fluorescent wheel 21 are switched synchronously. By increasing the rotation speed of the color filter wheel 31 without changing the rotation speed of the fluorescent wheel 21, the second area on the color filter wheel 31 and the first area on the fluorescent wheel 21 can be switched synchronously; and by increasing the rotation speed of the color filter wheel 31, the time taken for the light spot to pass through the boundary between adjacent partitions on the color filter wheel 31 can be reduced, thereby shortening the color mixing time, reducing the mixed light, and further improving the display effect of the laser optical system; and because only the rotation speed of the color filter wheel 31 is increased without changing the rotation speed of the fluorescent wheel 21, problems such as heat dissipation difficulties or severe noise of the fluorescent wheel 21 caused by increasing the rotation speed of the fluorescent wheel 21 can be effectively avoided.

[0057] Reference Figure 2 and Figure 3As shown, in some embodiments, the first area includes at least two first sub-areas arranged along the circumferential direction, and the two adjacent first sub-areas are fluorescent areas of different colors, that is, the colors of light emitted from adjacent first sub-areas are different; the second area includes at least two second sub-areas arranged along the circumferential direction, and the two adjacent second sub-areas are filtering areas of different colors, that is, the colors of light emitted from adjacent second sub-areas after filtering are different, and the second sub-areas are arranged in a one-to-one correspondence with the first sub-areas, so that the purpose of emitting light of different colors is achieved through the correspondingly arranged fluorescent areas and filtering areas.

[0058] Specifically, the first region can be selected to include a first sub-region that outputs red light (i.e., a red fluorescent region) and a first sub-region that outputs green light (i.e., a green fluorescent region), and the corresponding second region can include a second sub-region corresponding to the first sub-region that outputs red light (i.e., a red filter region) and a second sub-region corresponding to the first sub-region that outputs green light (i.e., a green filter region), thereby achieving the purpose of emitting red light and green light.

[0059] Of course, you can also choose that the first area includes a first sub-area that can output yellow light (i.e., yellow fluorescent area) and a first sub-area that outputs green light (i.e., green fluorescent area), and the second area includes a second sub-area corresponding to the first sub-area that outputs yellow light (specifically, a red filter area), and also includes a second sub-area corresponding to the first sub-area that outputs green light (i.e., green filter area). It should be noted that the yellow in the first area refers to the color of the fluorescent powder, which is yellow to the naked eye and is used to emit yellow fluorescence; the red light in the second area refers to the red light obtained by filtering the filter area, which is the red light obtained after the yellow fluorescence passes through the red filter area. With this arrangement, the purpose of emitting red light and green light can also be achieved.

[0060] It should be noted that the number and color of the fluorescent areas included in the first area are not limited to the above limitations. Correspondingly, the number and color of the filter areas included in the second area are also not limited to the above limitations. In specific implementations, they can be reasonably set according to actual needs.

[0061] Furthermore, a light homogenizing component 4 is provided on the output optical path of the above-mentioned color filter wheel 31. The light homogenizing component 4 receives the colored light filtered by the color filter wheel 31 to transmit it to the processor for processing and then project it onto the screen. The light homogenizing component 4 has a receiving lens for receiving light. When the boundary line between two adjacent second sub-areas in the second area enters the receiving lens, the colored light received by the light homogenizing component 4 is a mixed light of the two colors of colored light filtered by the two second sub-areas. Therefore, by increasing the rotation speed of the color filter wheel 31 and reducing the time when the mixed light appears, the quality of the screen display image can be improved.

[0062] Specifically, when a first sub-region of the above-mentioned fluorescent wheel 21 outputs a color of light, the corresponding second region on the color filter wheel 31 is blocked in front of the receiving lens of the light homogenizing component 4 to filter the color light, and when two adjacent first sub-regions are switched alternately, the corresponding two adjacent second sub-regions are also switched accordingly, so that multiple second sub-regions are switched synchronously with multiple first sub-regions, and the fluorescent wheel 21 rotates so that different first sub-regions alternately receive the irradiation of the laser light source 1 and emit light of different colors, so that the fluorescent wheel 21 outputs timing light of alternating colors; accordingly, the color filter wheel 31 rotates so that the second sub-regions that filter different colors of light alternately receive the timing light output by the fluorescent wheel 21, and the alternating timing between the second sub-regions is the same as the timing of the fluorescent wheel 21 outputting timing light of different colors, and the multiple second sub-regions correspond one-to-one to the multiple first sub-regions, so that the color filter wheel 31 synchronously filters the timing light of different colors emitted by the fluorescent wheel 21.

[0063] In a specific implementation, the radius of the fluorescent wheel 21 can be selected to be equal to the radius of the color filter wheel 31, and of course, the radius of the fluorescent wheel 21 can also be selected to be smaller than the radius of the color filter wheel 31; when the rotation speed of the color filter wheel 31 is twice the rotation speed of the fluorescent wheel 21, the fluorescent wheel 21 can be selected to have two first areas, and the color filter wheel 31 has a second area, and the center angle of a first sub-area in one of the first areas on the fluorescent wheel 21 accounts for half of the center angle of the corresponding second sub-area on the color filter wheel 31, so that the time when a first sub-area outputs color light is equal to the time when the corresponding second sub-area receives color light, so that the output of color light by the fluorescent wheel 21 and the filtering of color light by the color filter wheel 31 are synchronized. That is, when the fluorescent wheel 21 rotates half a circle, all the first sub-areas in a first area of ​​the fluorescent wheel 21 complete the alternation and output the timing light of different colors, and when the color filter wheel 31 rotates one circle, all the second sub-areas in the second area complete the synchronous filtering of the timing light of different colors alternating from a first area of ​​the fluorescent wheel 21. Since the rotation speed of the color filter wheel 31 is twice that of the fluorescent wheel 21, the time required for the boundary line of two adjacent second sub-areas of the color filter wheel 31 to sweep across the light homogenizing component 4 is half of the time required when the rotation speeds of the traditional fluorescent wheel 21 and the color filter wheel 31 are the same, thereby reducing the proportion of time occupied by the mixed light in the timing light filtered by the color filter wheel 31, thereby improving the display effect.

[0064] Of course, in other embodiments, the fluorescent wheel 21 may be provided with other numbers of first regions, the color filter wheel 31 may be provided with other numbers of second regions, and the number of first regions may be m times the number of second regions.

[0065] In the traditional laser light source system, the rotation speed of the color filter wheel 31 is the same as that of the fluorescent wheel 21, and the number of first areas on the fluorescent wheel 21 is equal to the number on the color filter wheel 31, so that the color filter wheel 31 can synchronously filter the timing light of different colors alternating between the fluorescent wheel 21. When the fluorescent wheel 21 is provided with two first areas, the first area includes two first sub-areas, that is, the fluorescent wheel 21 includes four first sub-areas, and there are four boundary lines between the four first sub-areas. The color filter wheel 31 is also provided with two second areas, each of which includes two second sub-areas. There are four second sub-areas on the color filter wheel 31, and the four second sub-areas correspond to the four first sub-areas one by one. The color filter wheel 31 has four boundary lines. When the fluorescent wheel 21 rotates one circle to output the timing light of the two first areas, the color filter wheel 31 also needs to rotate one circle to synchronously filter the timing light of the two first areas, and the light homogenizing component 4 needs to be swept by the four boundary lines on the color filter wheel 31 to receive four mixed lights. In the embodiment of the present disclosure, when the rotation speed of the color filter wheel 31 is twice that of the fluorescent wheel 21, two first areas are set on the fluorescent wheel 21, and the first area includes two first sub-areas, while only one second area is set on the color filter wheel 31, so that synchronous filtering of the color light output by the fluorescent wheel 21 can be achieved. One second area on the color filter wheel 31 includes two second sub-areas, so there are two boundary lines on the color filter wheel 31. When the fluorescent wheel 21 still outputs the timing light of the two first areas, the color filter wheel 31 rotates two circles to filter the timing light of the two first areas, and the light homogenizing component 4 is swept twice by the two boundary lines on the color filter wheel 31 respectively, so that the light homogenizing component 4 still receives four mixed lights. However, since the speed at which each boundary line of the color filter wheel 31 sweeps over the light homogenizing component 4 is twice the speed at which the boundary line of the color filter wheel 31 sweeps over the light homogenizing component 4 in the system of the traditional laser light source, the time occupied by the light homogenizing component 4 receiving the mixed light in the timing light of the two first areas is halved, thereby reducing the time for the light homogenizing component 4 to receive the mixed light within the period of receiving the two timing lights.

[0066] In the above embodiment, the first area is set to include at least two first sub-areas arranged along the circumferential direction, and the two adjacent first sub-areas are fluorescent areas of different colors, so that when the fluorescent wheel 21 rotates, different first sub-areas in the first area can alternately receive the irradiation of the laser light source 1 and emit timing light of alternating colors, and the second area includes at least two second sub-areas arranged along the circumferential direction, and the two adjacent second sub-areas are filtering areas of different colors, so that when the color filter wheel 31 rotates, the second sub-areas in the second area can alternately receive the timing light emitted by the first area, and the second sub-areas are arranged in a one-to-one correspondence with the first sub-areas, so that the second sub-areas can synchronously filter the color light output by the corresponding first sub-area, thereby achieving the effect that the color filter wheel 31 synchronously filters the timing light output by the fluorescent wheel 21.

[0067] Reference Figure 2 and Figure 3As shown, in some embodiments, of two adjacent first sub-regions, one is a yellow fluorescent region and the other is a green fluorescent region; of two adjacent second sub-regions, one is a red filter region and the other is a green filter region, and the yellow fluorescent region and the red filter region are arranged correspondingly, and the green fluorescent region and the green filter region are arranged correspondingly.

[0068] Specifically, the yellow fluorescent area can be selected to emit yellow light after receiving irradiation from the laser light source 1, and the green fluorescent area can be selected to emit green light after receiving irradiation from the laser light source 1. The red filter area is a red filter area through which only red light can be transmitted after being irradiated with light of multiple colors, and the green filter area is a color filter area through which only green light can be transmitted after being irradiated with light of multiple colors. Since the yellow light contains the wavelength of the red light, after the yellow light output by the yellow fluorescent area irradiates the red filter area, the red filter area can filter the red light, and the green light output by the green fluorescent area can obtain green light after being filtered by the green filter area.

[0069] In the above embodiment, the yellow fluorescent area is set corresponding to the red filter area, and the green fluorescent area is set corresponding to the green filter area. The yellow light can obtain red light after being filtered by the red filter area, and the green light can only obtain green light after being filtered by the green filter area, so that the second area can filter to obtain alternating red light and green light.

[0070] Reference Figure 2 and Figure 3 As shown, in some embodiments, the rotation speed of the color filter wheel 31 is twice the rotation speed of the fluorescent wheel 21; the number of first areas is two, the number of second areas is one, and the proportion of the center angle of each first area on the fluorescent wheel 21 is 1 / 2 of the proportion of the center angle of the second area on the color filter wheel 31.

[0071] Specifically, the fluorescent wheel 21 may be selected as follows: Figure 2 As shown, accordingly, the color filter wheel 31 can be selected as follows Figure 3 As shown, when the rotation speed of the color filter wheel 31 is twice that of the fluorescent wheel 21, the fluorescent wheel 21 includes two first areas, and correspondingly, the color filter wheel 31 includes one second area, that is, the number of first areas is twice the number of second areas, and the number of second areas is one, that is, the number of second areas is as small as possible, so that the proportion of the center angle of the second area on the color filter wheel 31 can be increased as much as possible, thereby reducing the number of boundary lines formed between filter areas of different colors on one circle of the color filter wheel 31, and further reducing the time proportion required for the light homogenizing component 4 to scan the boundary line on the color filter wheel 31 when the color filter wheel 31 rotates one circle, thereby achieving the purpose of reducing mixed light.

[0072] Exemplarily, a first region includes two first sub-regions, namely, a first red light region 212 for outputting red light and a first green light region 213 for outputting green light. The center angle of a first red light region 212 (R region shown in the figure) is 89°, and the center angle of a first green light region 213 (G region shown in the figure) is 63°, that is, the center angle of the first region on the fluorescent wheel 31 accounts for the sum of 89 / 360 and 63 / 360, that is, (89+63) / 360. Correspondingly, a second region includes a second red light region 312 (R region shown in the figure) for filtering red light, the center angle of which is 178°, and a second green light region 313 (G region shown in the figure) for filtering green light, the center angle of which is 126°, that is, the center angle of the second region on the color filter wheel 31 accounts for the sum of 178 / 360 and 126 / 360, that is, (178+126) / 360. Of course, the center angles of the first red light zone 212 and the first green light zone 213 on the fluorescent wheel 21 are not limited to the above specific limitations. Correspondingly, the center angles of the second red light zone 312 and the second green light zone 313 on the color filter wheel 31 are also not limited to the above specific limitations and can be reasonably set according to actual conditions.

[0073] When the color filter wheel 31 rotates at twice the speed of the fluorescent wheel 21, the proportion of the central angle of each second area of ​​the color filter wheel 31 is twice the proportion of the central angle of the corresponding first area of ​​the fluorescent wheel 21, and the proportion of the central angle of each second area is twice the proportion of the central angle of the corresponding first area, so that the time when the first red light area 212 outputs red light is equal to the time when the second red light area 312 filters red light, and the time when the first green light area 213 outputs filtered light is equal to the time when the second green light area 313 filters green light. The fluorescent wheel 21 rotates half a circle so that the first red light area 212 and the first green light area 213 receive the irradiation of the laser light source 1 and output red light and green light in sequence, and the color filter wheel 31 rotates one circle so that the second red light area 312 and the second green light area 313 receive the filtered red light and green light in sequence, respectively, and the fluorescent wheel 21 rotates one circle so that the two first areas output two sequential lights, and the color filter wheel 31 rotates two circles to filter the two sequential lights output by the fluorescent wheel 21.

[0074] By setting the rotation speed of the color filter wheel 31 to be twice the rotation speed of the fluorescent wheel 21, and determining the number of the first areas to be two and the number of the second areas to be one, it is ensured that when the fluorescent wheel 21 rotates so that a first area outputs sequential light, the second area can synchronously filter the sequential light output by a first area, and the center angle proportion of each first area on the fluorescent wheel is (89+63) / 360, and the center angle proportion of the second area on the color filter wheel is (178+126) / 360, so that the time when the first area outputs the colored light is equal to the time when the second area receives the colored light for filtering, thereby realizing the color filter wheel 31 synchronously filtering the colored light output by the fluorescent wheel 21.

[0075] Of course, in a specific implementation, when the rotation speed of the color filter wheel 31 is twice that of the fluorescent wheel 21, the number of the first regions is not limited to two, and correspondingly, the number of the second regions is not limited to one. Exemplarily, the number of the first regions is four, and correspondingly, the number of the second regions is two, and the proportion of the center angle of each first region on the fluorescent wheel 21 is 1 / 2 of the proportion of the center angle of the second region on the color filter wheel 31, which can also achieve the above purpose, and will not be repeated here.

[0076] In some embodiments, a first marking point is provided on the fluorescent wheel, and a second marking point is correspondingly provided on the color filter wheel; when the first marking point and the second marking point coincide at a preset position and reach the next coincidence, the number of revolutions of the color filter wheel is m times the number of revolutions of the fluorescent wheel.

[0077] Specifically, a first marking point can be set at the edge of the first area on the fluorescent wheel 21, and a second marking point can be set at the edge of the second area of ​​the color filter wheel 31. The fluorescent wheel 21 and the color filter wheel 31 start to rotate when the first marking point and the second marking point coincide at a preset position. When the fluorescent wheel 21 rotates one circle and the color filter wheel 3 rotates N circles, the second marking point reaches the set position for the Nth time and coincides with the first marking point, so that it can be determined that the first area corresponding to the first marking point and the second area corresponding to the second marking point are synchronized, where N is an integer m, that is, N is a positive integer greater than 1.

[0078] Of course, the first mark point can also be set at the boundary line of two adjacent first sub-areas in a first area on the fluorescent wheel 21, and the second mark point can be set at the boundary line of two adjacent second sub-areas on the filter wheel 31, and the second sub-areas on both sides of the second mark point correspond to the first sub-areas on both sides of the first mark point. Specifically, the first mark point can be set at the boundary line of the first sub-area outputting red light and the second sub-area outputting green light of the fluorescent wheel 21, and the second mark point can be set at the boundary line of the second sub-area filtering red light and the second sub-area filtering green light of the color filter wheel 31. Before the fluorescent wheel 21 and the color filter wheel 31 start to rotate, the first mark point and the second mark point are in a coincident state on the optical path of the laser light source 1, and the position at this time is the preset position. Of course, any point along the circumferential direction on the fluorescent wheel 21 can also be selected as the set position, as long as the first mark point and the second mark point coincide at the preset position. A detector can be optionally set at the preset position, and the detector is used to detect whether the first mark point and the second mark point at the preset position coincide with each other. That is, the position of the detector is set to the preset position. When the fluorescent wheel 21 and the filter wheel 31 start to rotate, it is necessary to first make the first mark point and the second mark point coincide with each other at the preset position, and then start to rotate simultaneously.

[0079] After the fluorescent wheel 21 rotates one circle, the color filter wheel 31 rotates m circles. At this time, the first mark point and the second mark point are in an overlapping state. By checking whether the first mark point and the second mark point overlap at the preset position each time the fluorescent wheel 21 rotates one circle, it is possible to check whether the first area and the second area are synchronized. This achieves the effect of being able to check whether the first area of ​​the fluorescent wheel 21 and the second area of ​​the color filter wheel 31 are synchronized through the first mark point and the second mark point.

[0080] In the above embodiment, a first mark point is provided on the fluorescent wheel, and a second mark point is correspondingly provided on the color filter wheel; when the first mark point and the second mark point coincide at the preset position and reach the next coincidence, the number of revolutions of the color filter wheel is m times the number of revolutions of the fluorescent wheel. When the fluorescent wheel 21 rotates one circle from the preset position, and the color filter wheel 31 rotates m circles from the preset position, the second mark point reaches the preset position for the mth time and coincides with the first mark point. The synchronization of the first area and the second area is checked by checking whether the first mark point and the second mark point coincide at the preset position correspondingly after the fluorescent wheel 21 rotates one circle each time, thereby ensuring the synchronization of the output color light and the filtered color light during the rotation of the fluorescent wheel 21 and the color filter wheel 31, so as to ensure the stability of the color light received by the light homogenizing component 4.

[0081] Reference Figure 4 and Figure 5As shown, the laser light source system further includes a first drive motor 22 and a second drive motor 32; the first drive motor 22 is connected to the fluorescent wheel 21 for driving the fluorescent wheel 21 to rotate, and the second drive motor 32 is connected to the color filter wheel 31 for driving the color filter wheel 31 to rotate; wherein, when the rotation speed of the color filter wheel 31 is twice that of the fluorescent wheel 21, the output frequency of the first drive motor is 120Hz, and the output frequency of the second drive motor is 240Hz. .

[0082] Specifically, the rotation axis of the fluorescent wheel 21 can be connected to the first drive motor 22, and the rotation axis of the color filter wheel 31 can be connected to the second drive motor 32. The rotation axis of the fluorescent wheel 21 is parallel to the direction of the laser light emitted by the laser light source 1, so that the laser light emitted by the laser light source 1 is perpendicular to the surface of the fluorescent wheel 21. The rotation axis of the color filter wheel 31 is parallel to the propagation direction rotation axis of the color light output by the fluorescent wheel 21, so that the color light output by the fluorescent wheel 21 is perpendicular to the surface of the color filter wheel 31. The output frequency of the first drive motor is 120 Hz, and the output frequency of the second drive motor is 240 Hz, so that the rotation speed of the color filter wheel 31 is twice the rotation speed of the fluorescent wheel 21.

[0083] In the above embodiment, the laser light source system further includes a first drive motor 22 and a second drive motor 32 as the driving force for rotating the fluorescent wheel 21 and the filter wheel 31 respectively, and when the rotation speed of the filter wheel 31 is twice the rotation speed of the fluorescent wheel 21, the output frequency of the first drive motor is 120 Hz, and the output frequency of the second drive motor is 240 Hz; the first drive motor 22 drives the fluorescent wheel 21 to rotate so that the two first areas alternately receive the irradiation of the laser light source 1 and output the color light, and the second drive motor 32 drives the color filter wheel 31 to rotate so that different positions of the second area receive the color light output by the fluorescent wheel 31 and filter it; finally, the second drive motor 32 drives the filter wheel 31 to rotate so that different positions of the second area receive the color light output by the fluorescent wheel 31 and filter it; The motor 32 can make the color filter wheel 31 rotate smoothly and continuously, and the first drive motor 22 can make the fluorescent wheel 21 rotate smoothly and continuously; since the fluorescent wheel 21 is arranged close to the laser light source 1, the laser light source 1 will generate heat when working. Using the 120Hz first drive motor 22 can avoid excessive heat generated when the motor is working and increase the heat dissipation burden of the laser light source system. The color filter wheel 31 is far away from the laser light source 1, and using the 240Hz second drive motor 32 will not affect the heat dissipation of the laser light source system, thereby ensuring the stability of the laser light source system during operation by reasonably selecting the output frequencies of the first drive motor 22 and the second drive motor 32.

[0084] Reference Figures 1 to 10 As shown, in some embodiments, m is a positive integer N greater than 1.

[0085] Specifically, the ratio of the number of first areas on the fluorescent wheel 21 to the number of second areas on the color filter wheel 31 is a positive integer N greater than 1. By setting m to a positive integer N greater than 1, the number of groups of three primary color lights received by the light homogenizing component 4 after the fluorescent wheel 21 rotates one circle is a positive integer, which facilitates the light homogenizing component 4 to identify and calculate.

[0086] Reference Figure 2 and Figure 3 As shown, in some embodiments, the fluorescent wheel 21 further includes a laser scattering region, and the color filter wheel 31 further includes a transmission region corresponding to the laser scattering region. When the number of the first regions is greater than or equal to two, the laser scattering region is located between the two first regions.

[0087] Specifically, the laser heat dissipation area can be selected as an area that allows the laser to be transmitted while retaining the color of the laser itself. When the laser light source 1 is a blue laser source, a first blue light area 211 can be selected on the fluorescent wheel 21. The angle of a first blue light area 211 (area B shown in the figure) is 28°. The laser scattering area can be selected to be set between adjacent first areas. For example, when two first areas are provided on the fluorescent wheel 21, a laser scattering area can be set between the two first areas, that is, two laser scattering areas are provided on the fluorescent wheel 21. Figure 2 As shown, the first red light zone 212 and the first green light zone 213 are two first sub-zones of the first area, the angle occupied by a first red light zone 212 (R zone shown in the figure) is 89°, the angle of a first green light zone 213 (G zone shown in the figure) is 63°, and the first blue light zone 211 is set between the two first areas, and the angle of a first blue light zone 211 (B zone shown in the figure) is 28°.

[0088] The above-mentioned transmission area can be selected as an area on the color filter wheel 31 that can only transmit the color light of the same color as the laser light source 1. When a second area is provided on the color filter wheel 31, the transmission area is arranged along the circumference of the color filter wheel 31 and the second area, such as Figure 3 As shown, when the color of the laser light source 1 is blue monochromatic light, the second red light area 312 and the second green light area 313 are two second sub-areas of the second area, the second blue light area 311 is a transmission area, a second red light area 312 (R area shown in the figure) for filtering red light occupies an angle of 178°, a second green light area 313 (G area shown in the figure) for filtering green light occupies an angle of 126°, and a second blue light area 311 (B area shown in the figure) for filtering blue light occupies an angle of 56°.

[0089] In the above embodiment, by setting a laser scattering area on the fluorescent wheel 21, the color of the laser light source 1 itself can be output as a color light, and a corresponding transmission area is set on the color filter wheel 31 so that the transmission area filters the laser light source 1 to obtain the color light of the required color.

[0090] Reference Figure 1 , Figures 6 to 9 As shown, the laser light source system further includes an optical path guiding device, which is used to guide the light emitted by the laser light source to enter the color filter wheel 31 via the fluorescent wheel 21. Specifically, the optical path guiding device includes a fluorescent reflector 51, an optical circuit unit and two groups of lens assemblies 52, the two groups of lens assemblies 52 are respectively arranged on both sides of the fluorescent wheel 21, the fluorescent reflector 51 and the optical circuit unit are respectively arranged on both sides of the fluorescent wheel 21, the fluorescent reflector reflects the color light emitted by the fluorescent area of ​​the fluorescent wheel 21 to the filter area of ​​the color filter wheel 31, and the optical circuit unit guides the color light transmitted by the laser scattering area to the transmission area of ​​the color filter wheel 31; the fluorescent wheel 21 can be used as a conversion component 2 for converting the wavelength of the laser light source 1, and the color filter wheel 31 can be used as a filter component 3 for filtering light to obtain pure color light.

[0091] Specifically, the optical path guiding device includes a fluorescent reflector 51, an optical circuit unit and two groups of lens assemblies 52. The two groups of lens assemblies 52 are respectively arranged on both sides of the fluorescent wheel 21. The fluorescent reflector 51 and the optical circuit unit are respectively arranged on both sides of the fluorescent wheel 21. The laser transmits the laser scattering area and enters the optical circuit unit. The optical circuit unit guides the colored light transmitted by the transmission area to irradiate the transmission area of ​​the color filter wheel 31. The laser irradiates the fluorescent area of ​​the fluorescent wheel 21 and reflects and emits colored light of different colors. The colored light irradiates the fluorescent reflector 51, and the fluorescent reflector 51 reflects the colored light to the color filter wheel 31. The optical path of the light passing through the laser scattering area is opposite to the optical path of the colored light output by the fluorescent area, so that the fluorescent reflector 51 on one side of the fluorescent wheel 21 receives the colored light output by the fluorescent area, and the optical circuit unit on the other side of the fluorescent wheel 21 receives the light transmitted by the laser scattering area.

[0092] The lens assembly 52 can be a convex lens. Two groups of lens assemblies 52 are respectively arranged on both sides of the fluorescent wheel 21, and the convex surfaces of the two lens assemblies 52 are arranged in a direction away from the fluorescent wheel 21, so that the parallel light path passes along the direction of the lens assembly 52 toward the fluorescent wheel 21 and is focused on the fluorescent wheel 21 after passing through the lens assembly 52. ​​The monochromatic laser is focused on the laser scattering area of ​​the fluorescent wheel 21 through one lens assembly 52, and the laser is irradiated on the other lens assembly 52 after passing through the laser scattering area, and then guided to the color filter wheel 31 through the optical circuit unit; because the convex surface of the lens assembly 52 is away from the fluorescent wheel 21, the fluorescent wheel 21 is directed toward the lens assembly 52. The emitted light is converted into a parallel light path after passing through the lens assembly 52. ​​When the laser light source 1 irradiates the fluorescent area of ​​the fluorescent wheel 21, the colored light output by the fluorescent area is reflected to the lens assembly 52 along the direction of the fluorescent wheel 21 toward the lens assembly 52 in the opposite direction of the light path of the laser light source 1. After being converted into a parallel light path by the lens assembly 52, it is irradiated to the fluorescent reflector 51 between the laser light source 1 and the fluorescent wheel 21. The rotation axis of the color filter wheel 31 is perpendicular to the rotation axis of the fluorescent wheel 21. The angle of the fluorescent reflector 51 is adjusted to reflect the colored light to the second area of ​​the color filter wheel 31. Finally, the colored light of different colors output by the laser light source 1 after irradiating the fluorescent wheel 21 can all be transmitted to the color filter wheel 31.

[0093] The above-mentioned optical circuit unit can optionally include three one-way reflectors 53, two of which are arranged on the side of the fluorescent wheel 21 away from the laser light source 1, and one is arranged on the side of the fluorescent wheel 21 close to the laser light source 1, so that the colored light output by the laser light source 1 after passing through the transmission area of ​​the fluorescent wheel 21 irradiates the color filter wheel 31 through the three one-way reflectors 53; a focusing component 54 can also be optionally arranged between the laser light source 1 and the fluorescent wheel 21, and the focusing component 54 includes a convex lens and a concave lens, the convex surface of the convex lens faces the laser light source 1, and the concave surface of the concave lens faces the laser light source 1, and the laser emitted by the laser light source 1 is first focused by the convex lens and then converted into parallel light by the concave lens, so that the diameter of the laser spot emitted by the laser light source 1 is reduced.

[0094] The fluorescent reflector 51 can be located between the laser light source 1 and the fluorescent wheel 21, and the fluorescent reflector 51 is on the propagation light path of the laser light source 1. A coating can be provided on the fluorescent reflector 51 so that the laser light emitted by the laser light source 1 can penetrate the coating and transmit through the fluorescent reflector 51. The coating can reflect light of a color different from the color of the laser light emitted by the laser light source 1, so that the fluorescent reflector 51 is a dichroic mirror. The laser light emitted by the laser light source 1 transmits through the fluorescent reflector 51 and then irradiates the fluorescent wheel 21. The light of other colors reflected by the fluorescent wheel 21 is irradiated to the fluorescent reflector 51 and then reflected. The angle of the fluorescent reflector 51 is adjusted so that the colored light is reflected and transmitted to the color filter wheel 31.

[0095] In the above embodiment, the laser light source system is further provided with an optical path guiding device, which is used to guide the light emitted by the laser light source to enter the color filter wheel 31 through the fluorescent wheel 21, and the optical path guiding device includes a fluorescent reflector 51, an optical circuit unit and two groups of lens assemblies 52; the fluorescent reflector 51 reflects the colored light emitted by the fluorescent area of ​​the first area to the color filter component 3, and the optical circuit unit guides the colored light passing through the laser scattering area to the color filter wheel 31, and finally the colored light output by the laser scattering area of ​​the fluorescent wheel 21 and the first area illuminated by the laser light source 1 is propagated to the color filter component 3 through optical paths of different paths, and the interference of different colored lights in the propagation process is reduced by rationally planning the optical path, and the fluorescent reflector 51 is a dichroic mirror, which reduces the volume of the space occupied by the laser light source system, simplifies the optical path, and improves the use effect of the laser light source system.

[0096] Reference Figure 1 As shown, in some embodiments, the laser light source system further includes a light homogenizing component 4 , which is disposed on the output light path of the color filter wheel 31 and is used to receive the color light output after being filtered by the color filter wheel 31 .

[0097] Specifically, the light homogenizing component 4 can be selected to receive the colored light filtered by the color filter wheel 31 to transmit it to the processor for processing and then project it onto the screen. The light homogenizing component 4 has a receiving lens for receiving light, and the color filter wheel 31 is blocked in front of the receiving lens of the light homogenizing component 4, so that the light entering the receiving lens is all filtered by the color filter wheel 31.

[0098] The light homogenizing component 4 is provided to receive the color light filtered by the color filter wheel 31 , and the color light entering the light homogenizing component 4 can be mapped onto the screen to form an image after being processed.

[0099] Reference Fig.10 As shown, the embodiment of the present disclosure further provides a projection device, including a light valve 200, a lens assembly 300 and a laser light source system 100 as in any of the above embodiments, wherein the light emitted by the laser light source system 100 is modulated by the light valve 200 and then enters the lens assembly 300.

[0100] Specifically, the light valve 200 can be selected to be set in the optical path of the laser light source system 100. The light valve 200 can adjust the propagation direction of the three-primary color sequential light emitted by the laser light source system 100, and the lens assembly 300 can receive the three-primary color sequential light emitted by the laser light source system 100 to display an image.

[0101] By setting up a projection device including a light valve 200, a lens assembly 300 and the above-mentioned laser light source system 100, the light emitted by the laser light source system 100 is modulated by the light valve 200 and enters the lens assembly 300, thereby ultimately reducing the time proportion of the three-primary color sequential light in the mixed light output of the laser light source system 100, thereby improving the display effect of the final lens assembly 300.

[0102] In other embodiments, the structure in which the fluorescent wheel 21 rotates to make different first areas contact with the laser light source 1 can make the fluorescent wheel 21 equivalent to a rectangular fluorescent sheet, and the first area is set along the length direction of the fluorescent sheet. The fluorescent sheet is connected to a motor or an electric motor, so that the fluorescent sheet moves along the length direction of the fluorescent sheet under the drive of the motor or the electric motor. The laser light source 1 vertically illuminates the surface of the fluorescent sheet, and the laser light source 1 continuously illuminates different positions of the first area during the reciprocating movement of the fluorescent sheet. The first area is arranged with first sub-areas that output light of different colors along the length direction of the fluorescent sheet, and different first sub-areas The area receives the irradiation of the laser light source 1 and outputs light of different colors; the color filter wheel 31 rotates to make different second areas contact with the light emitted by the fluorescent wheel 21, so that the color filter wheel 31 can be equivalent to a rectangular color filter, and the second area is set along the length direction of the color filter. The color filter is connected to a motor or an electric motor, so that the color filter moves back and forth along the length direction of the color filter under the drive of the motor or the electric motor. The color light output by the fluorescent film vertically irradiates the surface of the color filter. In the process of reciprocating movement of the color filter, the color light output by the fluorescent film continuously irradiates the corresponding second area, so that the color filter filters light of different colors.

[0103] Furthermore, when the number of first areas and second areas is equal, the length of the color filter is m times the length of the fluorescent sheet, the length of a second area is m times the length of a corresponding first area, and the moving speed of the color filter is m times the length of the fluorescent sheet. When the length of the color filter is equal to the length of the fluorescent sheet, the number of first areas is greater than the number of second areas, the moving speed of the color filter is m times the moving speed of the fluorescent sheet, and the length of a second area is m times the length of a corresponding first area. Thus, the fluorescent sheet moves so that the time when a first area outputs colored light is equal to the time when the corresponding second area on the color filter filters colored light, so that the colored light output by the fluorescent sheet and the colored light filtered by the color filter are synchronized.

[0104] By setting a fluorescent film and a color filter, the fluorescent film and the color filter are made to move back and forth to achieve the output of light of different colors and the synchronous filtering of light of different colors. Since the moving speed of the filter is greater than that of the fluorescent film, the time for the boundary line between two adjacent second areas on the filter to scan the uniform light component 4 is also less than the time required when the filter and the fluorescent film move at the same speed, thereby reducing the proportion of time that the uniform light component 4 receives mixed light when outputting light, thereby improving the effect of laser display.

[0105] When the laser light source system and projection device provided by the embodiment of the present disclosure are used specifically, the laser light source 1 is started to emit a blue monochromatic laser, and the monochromatic laser irradiates the fluorescent wheel 21. The monochromatic laser is focused and irradiated onto the fluorescent wheel 21 through a lens assembly 52. ​​After the monochromatic laser transmits through the first blue light area 211 of the laser projection area of ​​the fluorescent wheel 21, it is converted into parallel light through another lens assembly 52 and irradiates to the optical circuit unit. The colored light is guided to the color filter wheel 31 through a plurality of one-way reflectors 53 in the optical circuit unit. When the monochromatic laser is focused and irradiated to the fluorescent area of ​​the first area of ​​the fluorescent wheel 21 through a lens assembly 52, the laser irradiates the first red light area 212 and reflects red light, and when the laser irradiates the first green light area 213, it reflects green light. The red light and the green light return in the reverse direction of the optical path of the laser irradiating the fluorescent wheel 21 and are irradiated onto the coating of the fluorescent reflector 51 and reflected. The angle of the fluorescent reflector 51 is adjusted to irradiate the red light and the green light onto the color filter wheel 31. The fluorescent wheel 21 is driven at the first The color filter wheel 31 rotates under the drive of the motor 22, and the color filter wheel 31 rotates under the drive of the second driving motor 32. The rotation speed of the color filter wheel 31 is twice that of the fluorescent wheel 21. Two first areas are arranged on the fluorescent wheel 21. The fluorescent wheel 21 rotates half a circle to make one first area output colored light. The color filter wheel 31 rotates one circle to filter the colored light output by one first area output by the fluorescent wheel 21. The fluorescent wheel 21 rotates one circle to output the colored light of two first areas. The color filter wheel 31 rotates two circles to filter the colored light of two first areas. The fluorescent wheel 21 and the color filter wheel 31 start to rotate after the first marking point and the second marking point coincide at the preset position. Whether the first marking point and the second marking point coincide at the preset position is detected to determine whether the colored light filtered by the color filter wheel 31 is synchronized with the colored light output by the fluorescent wheel 21. The colored light filtered by the color filter wheel 31 is introduced into the light homogenizing component 4 to be integrated into the signal light. The laser light source system 100 emits the signal light to the light valve 200, which is modulated by the light valve 200 and enters the lens assembly 300 to display the image.

[0106] It should be noted that, in this article, relational terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device. In the absence of further restrictions, the elements defined by the sentence "comprise a ..." do not exclude the existence of other identical elements in the process, method, article or device including the elements.

[0107] The above description is only a specific embodiment of the present disclosure, so that those skilled in the art can understand or implement the present disclosure. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present disclosure. Therefore, the present disclosure will not be limited to the embodiments described herein, but will conform to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A laser light source system, characterized in that: include: Laser light source; A fluorescent wheel, arranged in the optical path of the laser light source, the fluorescent wheel comprising at least one first area arranged along a circumferential direction, the first area being a fluorescent area; A color filter wheel is arranged on the output light path of the fluorescent wheel, wherein the color filter wheel comprises at least one second area arranged along a circumferential direction, and the second area is a filter area arranged corresponding to the first area; Among them, when the rotation speed of the color filter wheel is m times the rotation speed of the fluorescent wheel, the number of the second areas is 1 / m of the number of the first areas, and the center angle occupancy of each second area on the color filter wheel is m times the center angle occupancy of the corresponding first area on the fluorescent wheel, where m is a positive rational number greater than 1.

2. The laser light source system according to claim 1, characterized in that: The first region includes at least two first sub-regions arranged along a circumferential direction, and two adjacent first sub-regions are fluorescent regions of different colors; The second region includes at least two second sub-regions arranged along a circumferential direction, two adjacent second sub-regions are filter regions of different colors, and the second sub-regions are arranged in a one-to-one correspondence with the first sub-regions.

3. The laser light source system according to claim 2, characterized in that: Two adjacent first sub-areas, one of which is a yellow fluorescent area, and the other of which is a green fluorescent area; One of two adjacent second sub-areas is a red filter area, and the other is a green filter area. The yellow fluorescent area is arranged correspondingly to the red filter area, and the green fluorescent area is arranged correspondingly to the green filter area.

4. The laser light source system according to claim 1, characterized in that: The rotation speed of the color filter wheel is twice that of the fluorescent wheel; The number of the first regions is two, the number of the second region is one, and the proportion of the center angle of each first region on the fluorescent wheel is 1 / 2 of the proportion of the center angle of the second region on the color filter wheel.

5. The laser light source system according to claim 1, characterized in that: The fluorescent wheel is provided with a first marking point, and the color filter wheel is provided with a corresponding second marking point; When the first marking point and the second marking point overlap at a preset position and reach the next overlap, the number of revolutions of the color filter wheel is m times the number of revolutions of the fluorescent wheel.

6. The laser light source system according to claim 1, characterized in that: The laser light source system also includes a first drive motor and a second drive motor; The first driving motor is connected to the fluorescent wheel and is used to drive the fluorescent wheel to rotate, and the second driving motor is connected to the color filter wheel and is used to drive the color filter wheel to rotate; Wherein, when the rotation speed of the color filter wheel is twice the rotation speed of the fluorescent wheel, the output frequency of the first driving motor is 120 Hz, and the output frequency of the second driving motor is 240 Hz.

7. The laser light source system according to any one of claims 1 to 6, characterized in that: The fluorescent wheel further includes a laser scattering region, and the color filter wheel further includes a transmission region corresponding to the laser scattering region. When the number of the first regions is greater than or equal to two, the laser scattering region is located between two of the first regions.

8. The laser light source system according to claim 7, characterized in that: The laser light source system further comprises a light path guiding device, wherein the light path guiding device is used to guide the light emitted by the laser light source to enter the color filter wheel via the fluorescent wheel; Among them, the light path guiding device includes a fluorescent reflector, an optical circuit unit and two groups of lens assemblies, the two groups of lens assemblies are respectively arranged on both sides of the fluorescent wheel, the fluorescent reflector and the optical circuit unit are respectively arranged on both sides of the fluorescent wheel, the fluorescent reflector reflects the color light emitted by the fluorescent area of ​​the fluorescent wheel to the filtering area of ​​the color filter wheel, and the optical circuit unit guides the color light transmitted by the laser scattering area to the transmission area of ​​the color filter wheel.

9. The laser light source system according to claim 8, characterized in that: The laser light source system further comprises a light homogenizing component, which is arranged on the output light path of the color filter wheel and is used for receiving the color light output after being filtered by the color filter wheel.

10. A projection device, characterized in that: It comprises a light valve, a lens assembly and the laser light source system as claimed in any one of claims 1 to 9, wherein the light emitted by the laser light source system enters the lens assembly after being modulated by the light valve.

Images