Patent Description:
In a light source system of an existing projector, multiple light sources are correspondingly disposed for multiple wavelength conversion devices, so that one light source correspondingly excites one wavelength conversion device to generate an excited light. The economic efficiency of the light source system with this structure is poor.

D1 (<CIT>) relates to a light source system, a projection device and a lighting device. The light source system comprises: a laser light source used for emitting a first-color laser; a supplementary light source used for emitting the laser as supplementary light; and an optical path selection element including a transmission part used for transmitting the first-color laser, a light path selection part used for sequentially reflecting the first-color laser to a first light path or a second light path at any time, and a driving part used for driving the transmission part and the light path selection part to be alternately positioned on the light path of the first color laser; a first wavelength conversion device used for generating second color fluorescence under the excitation of the first color laser transmitted along the first light path; and a second wavelength conversion device used for generating third color fluorescence under the excitation of the first color laser transmitted along the second light path, wherein the second color fluorescence, the third color fluorescence and the supplementary light are combined with the first color laser transmitted by the light path selection element and then emitted.

D2 (<CIT>) relates to a light source system and a projection device. The light source system comprises an excitation light source, an optical path changing device, multiple wavelength conversion devices and a control device. The excitation light source is used for emitting excitation light. The optical path changing device is capable of reciprocating between multiple preset positions and used for receiving and changing emitting optical paths of the excitation light so as to allow the excitation light to be emitted along one of the preset optical paths. The wavelength conversion devices are arranged on the preset optical paths and used for absorbing excitation light and generating excited light with different colors. The control device is used for changing positions of the optical path changing device according to image data of a to-be-displayed image and controlling staying time of the optical path changing device in each preset position so as to adjust the light emitting time sequence of excited light of each color and the occupation proportion of the light emitting time in one frame image time.

D3 (<CIT>) relates to a lighting apparatus, a display apparatus, a projection display apparatus, a lighting method, an image display method and an image projection method. Red light emitted from a red laser light source, green light emitted from a green laser light source and blue light emitted from a blue laser light source are incident on a first disc body of a color wheel, and are transmitted or reflected in conformity with the colors of the lights in wavelength selecting regions of a second disc body every time the color wheel performs a predetermined rotation. As being reflected by the first disc body, the lights are divided into different positions to be emitted from the color wheel and irradiated to irradiation regions successively switched by an upward or downward reciprocal movement of a mirror group.

Embodiments of the present application provide a light source system and a corresponding projector system, so as to solve the problem of poor economic efficiency due to that one wavelength conversion device in the existing light source system should to be provided with one light source correspondingly.

In a first aspect, an embodiment of the present application provides a light source system, including: a first light source, a first wavelength conversion device, a second wavelength conversion device, an light path conversion element, and a light combining unit, wherein the first wavelength conversion device and the second wavelength conversion device both are monochromatic phosphor wheels;.

In the above technical solution, the light source system makes the excitation light emitted by the first light source irradiate the first wavelength conversion device and the second wavelength conversion device in turn through the light path conversion element. That is, the first wavelength conversion device and the second wavelength conversion device share the single first light source, which can effectively reduce the volume of the entire system and disperse the heat dissipation pressure of the system at the same time. Therefore, the structure may be used in high-power light source systems and may have low cost.

In the above technical solution, the light path conversion element is the rotating wheel that rotates around its own axis. The rotating wheel can be rotated to the first working position and the second working position, so that the excitation light emitted by the first light source intermittently irradiates the first transmission area and the first reflection area. The excitation light emitted by the first light source does not always irradiate the same wavelength conversion device, thereby reducing the heat dissipation pressure of the first wavelength conversion device and the second wavelength conversion device. Under a condition that the excitation light emitted by the first light source irradiates the first transmission area, the excitation light will irradiate the first wavelength conversion device after passing through the first transmission area; under a condition that the excitation light emitted by the first light source irradiates the first reflection area, the excitation light will irradiate the second wavelength conversion device after being reflected by the first reflection area.

In the above technical solution, the reflection element can reflect the excitation light reflected by the first reflection area to change the propagation path of the excitation light. This structure enables the first wavelength conversion device and the second wavelength conversion device to be located on the same side of the rotating wheel, which makes the structure of the entire light source system more compact.

In some embodiments of the present application, the rotating wheel further has a third working position;.

In the above technical solution, the rotating wheel further includes a second reflection area and a third reflection area for reflection of the excitation light. Under a condition that the rotating wheel rotates to the third working position, the excitation light emitted by the first light source will be combined with the first excited light and the second excited light after being reflected by the second reflection area, reflected by the reflection element, and reflected by the third reflection area sequentially.

In some embodiments of the present application, the light combining unit includes a first light path turning system, a second light path turning system, a color filter wheel, and a light pipe;.

In the above technical solution, the first light path turning system and the second light path turning system both play the role of changing the light path. Therefore, the first excited light excited by the first wavelength conversion device and the second excited light excited by the second wavelength conversion device are guided into the color filter wheel and combined in the light pipe.

In a second aspect, an embodiment of the present application provides a projector system, including the light source system provided in the first aspect.

In the above technical solution, the first wavelength conversion device and the second wavelength conversion device in the light source system of the projector system share the single first light source, which can effectively reduce the volume of the entire system and has the advantage of low cost.

The drawings required to describe embodiments of the present application are introduced briefly below to illustrate technical solutions of the embodiments of the present application more clearly. It should be understood that the drawings described below only show some embodiments of the present application, and thus should not be regarded as a limitation of the scope. For those ordinary skilled in the art, other related drawings may be obtained from these drawings without any creative work.

Reference number: <NUM>-light source system; <NUM>-first light source; <NUM>-first wavelength conversion device; <NUM>-second wavelength conversion device; <NUM>-light path conversion element; <NUM>-vibrating element; <NUM>-rotating wheel; <NUM>-first transmission area; <NUM>-first reflection area; <NUM>-second transmission area; <NUM>-second reflection area; <NUM>-third reflection area; <NUM>-light combining unit; <NUM>-first light path turning system; <NUM>-second light path turning system; <NUM>-color filter wheel; <NUM>-light pipe; <NUM>-first shaping lens group; <NUM>-first reflector; <NUM>-second shaping lens group; <NUM>-second reflector; <NUM>-first beam splitter; <NUM>-second beam splitter; <NUM>-third shaping lens group; <NUM>-third reflector; <NUM>-fourth shaping lens group; <NUM>-fourth reflector; <NUM>-fifth shaping lens group; <NUM>-second light source; <NUM>-sixth shaping lens group; <NUM>-seventh shaping lens group; <NUM>-eighth shaping lens group; <NUM>-reflection element; A-base axis.

In order to make the objects, technical solutions and advantages of the embodiments of the present application more clear, the technical solutions in the embodiments of the present application will be described clearly and completely in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are a part of the embodiments of the present application, but not all of the embodiments. The components of the embodiments of the present application generally described and shown in the drawings herein may be arranged and designed in various different configurations.

Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents the selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those ordinary skilled in the art without any creative work shall fall within the protection scope of the present application.

It should be noted that the embodiments in the present application and the features in the embodiments could be combined with each other if there is no conflict.

It should be noted that similar reference numbers and letters indicate similar items in the following drawings. Therefore, once a certain item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

It should be noted that, in the description of the embodiments of the present application, the indicated orientation or positional relationship may be the orientation or positional relationship shown in the drawings, or may be the orientation or positional relationship of the product of the present application when the product is being used, or may be the orientation or positional relationship commonly understood by those ordinary skilled in the art. Further, the indicated orientation or positional relationship is only for the convenience of describing the present application and simplifying the description, and does not indicate or imply that the described device or element must have a specific orientation or must be constructed and operated in a specific orientation, and thus cannot be understood as a limitation of the present application. In addition, the terms "first", "second", "third" and the like are only used for distinguishing descriptions, and cannot be understood as indicating or implying relative importance.

As shown in <FIG>, this embodiment provides a light source system <NUM>, which includes a first light source <NUM>, a first wavelength conversion device <NUM>, a second wavelength conversion device <NUM>, an light path conversion element <NUM> and a light combining unit <NUM>.

The light path conversion element <NUM> is configured to make an excitation light emitted by the first light source <NUM> irradiate the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> in turn.

The excitation light emitted by the first light source <NUM> irradiates the first wavelength conversion device <NUM>, so as to excite and generate a first excited light; and the excitation light emitted by the first light source <NUM> irradiates the second wavelength conversion device <NUM>, so as to excite and generate a second excited light.

The light combining unit <NUM> is configured to combine the first excited light with the second excited light.

The light source system <NUM> makes the excitation light emitted by the first light source <NUM> irradiate the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> in turn through rotation of the light path conversion element <NUM>. That is, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> share the single first light source <NUM>, which can effectively reduce the volume of the entire system and disperse the heat dissipation pressure of the system at the same time. Therefore, the structure may be used in high-power light source systems and may have low cost.

It should be noted that the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> may be rotating or stationary. Under a condition that the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> are rotating, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> have a good heat dissipation performance, which increases their service life; under a condition that the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> are stationary, no noise is generated, so that the entire system has a good mute effect. Of course, under a condition that the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> are stationary, a heat dissipation device such as a radiator and a fan may be used for heat dissipation.

Exemplarily, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> both are monochromatic fluorescent wheels. In other embodiments, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> may also have other structures, for example, they both are multicolored fluorescent wheels. Of course, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> may not be fluorescent wheels, for example, they both are fluorescent ceramics.

The function of the first light source <NUM> is to provide the excitation light. In this embodiment, the first light source <NUM> is a blue laser light source, and the excitation light emitted by the first light source <NUM> is a blue light. In other embodiments, the first light source <NUM> may also be a light source such as an ultraviolet light source, an LED light source and the like.

The color of the fluorescers on the first wavelength conversion device <NUM> may be different from the color of the fluorescers on the second wavelength conversion device <NUM>. The color of the fluorescers on the first wavelength conversion device <NUM> may be red, yellow, green and the like; the color of the fluorescers on the second wavelength conversion device <NUM> may be red, yellow, green and the like. In this embodiment, the fluorescers on the first wavelength conversion device <NUM> is green, and the fluorescers on the second wavelength conversion device <NUM> is yellow. That is, the first excited light is a green light, and the second excited light is a yellow light.

The function of the light path conversion element <NUM> is to make the excitation light emitted by the first light source <NUM> irradiate the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> in turn, so as to correspondingly excite the first excited light and the second excited light.

Optionally, the light path conversion element <NUM> makes the excitation light emitted by the first light source <NUM> irradiate the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> in turn by rotating.

In this embodiment, the light path conversion element <NUM> is a vibrating element <NUM> that rotates back and forth around a base axis A, and the vibrating element <NUM> has a first working position and a second working position. Under a condition that the vibrating element <NUM> is at the first working position, the excitation light emitted by the first light source <NUM> irradiates the first wavelength conversion device <NUM> after being reflected by the vibrating element <NUM>. Under a condition that the vibrating element <NUM> is at the second working position, the excitation light emitted by the first light source <NUM> irradiates the second wavelength conversion device <NUM> after being reflected by the vibrating element <NUM>.

The vibrating element <NUM> can be vibrated to be located at the first working position and the second working position, so as to intermittently reflect the excitation light emitted by the first light source <NUM> to the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM>. The excitation light emitted by the first light source <NUM> does not always irradiate the same wavelength conversion device, thereby reducing the heat dissipation pressure of the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM>. The excitation light emitted by the first light source <NUM> is reflected to the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> through the vibration of the vibrating element <NUM>, and the implementation is simple. Moreover, under a condition that the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> are rotating, the excitation light reflected by the vibrating element <NUM> during the vibration of the vibrating element <NUM> will irradiate the first wavelength conversion device <NUM> at different positions in the radial and circumferential directions and irradiate the second wavelength conversion device <NUM> at different positions in the radial and circumferential directions, thereby reducing the instantaneous temperature of the fluorescers on the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM>.

The function of the vibrating element <NUM> is to reflect the excitation light, and the vibrating element <NUM> may be a reflector or a galvanometer coated with a reflection film. Of course, the reciprocating rotation of the vibrating element <NUM> may be realized by a driving device. For example, the vibrating element <NUM> is connected to an external motor, and the reciprocating rotation of the vibrating element <NUM> is realized through the forward and reverse rotation of the motor.

It should be noted that, the first working position of the vibrating element <NUM> may be a limit position of the vibrating element <NUM>, or may be a non-limit position of the vibrating element <NUM>; the second working position of the vibrating element <NUM> may be an limit position of the vibrating element <NUM>, or may be a non-limit position of the vibration element <NUM>. Under a condition that the first working position and the second working position are the limit positions of the vibrating element <NUM>, the vibrating element <NUM> rotates clockwise around the base axis A and eventually reaches the first working position, and the vibrating element <NUM> rotates counterclockwise around the base axis A and eventually reaches the second working position. Under a condition that the first working position and the second working position are non-limit positions, when the vibrating element <NUM> rotates clockwise around the base axis A to the first working position, the vibrating element <NUM> can continue to rotate clockwise, and when the vibrating element <NUM> rotates counterclockwise around the base axis A to the second working position, the vibrating element <NUM> can continue to rotate counterclockwise.

The first wavelength conversion device <NUM> may be a transmission type wavelength conversion device or a reflection type wavelength conversion device; and the second wavelength conversion device <NUM> may be a transmission type wavelength conversion device or a reflection type wavelength conversion device.

In this embodiment, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> both are transmission type wavelength conversion devices. That is, the first excited light excited after the excitation light irradiates the first wavelength conversion device <NUM> will pass through the first wavelength conversion device <NUM>, and the second excited light excited after the excitation light irradiates the second wavelength conversion device <NUM> will pass through the second wavelength conversion device <NUM>.

Further, the light combining unit <NUM> includes a first light path turning system <NUM>, a second light path turning system <NUM>, a color filter wheel <NUM> and a light pipe <NUM>. The first excited light enters into the light pipe <NUM> through the first light path turning system <NUM> and the color filter wheel <NUM> in sequence; and the second excited light enters into the light pipe <NUM> through the second light path turning system <NUM> and the color filter wheel <NUM> in sequence.

The first light path turning system <NUM> and the second light path turning system <NUM> both play a role of changing the light path. Therefore, the first excited light excited by the first wavelength conversion device <NUM> and the second excited light excited by the second wavelength conversion device <NUM> are guided into the color filter wheel <NUM> and combined in the light pipe <NUM>.

Exemplarily, the first light path turning system <NUM> includes a first shaping lens group <NUM>, a first reflector <NUM>, a second shaping lens group <NUM>, a second reflector <NUM>, a first beam splitter <NUM> and a second beam splitter <NUM>. The first excited light passes through the first wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the first shaping lens group <NUM>, the first reflector <NUM>, the second shaping lens group <NUM>, the second reflector <NUM>, the first beam splitter <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the function of the first shaping lens group <NUM> is to shape the first excited light after passing through the first wavelength conversion device <NUM>; the function of the second shaping lens group <NUM> is to shape the first excited light after being reflected by the first reflector <NUM>; the function of the first beam splitter <NUM> is to reflect the first excited light after being reflected by the second reflector <NUM>; and the function of the second beam splitter <NUM> is to reflect the first excited light after being reflected by the first beam splitter <NUM>.

The second light path turning system <NUM> includes a third shaping lens group <NUM>, a third reflector <NUM>, a fourth shaping lens group <NUM> and a fourth reflector <NUM>. The second excited light passes through the second wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the third shaping lens group <NUM>, the third reflector <NUM>, the fourth shaping lens group <NUM>, the fourth reflector <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the function of the third shaping lens group <NUM> is to shape the second excited light after passing through the second wavelength conversion device <NUM>; the function of the fourth shaping lens group <NUM> is to shape the second excited light after being reflected by the third reflector <NUM>; and the function of the second beam splitter <NUM> is to reflect the second excited light after being reflected by the fourth reflector <NUM>.

Optionally, the light source system <NUM> further includes a second light source <NUM>. The light combining unit <NUM> is configured to combine the first excited light and the second excited light with an excitation light emitted by the second light source <NUM>.

In this embodiment, the second light source <NUM> is a blue laser light source, and the excitation light emitted by the second light source <NUM> is a blue light.

The light combining unit <NUM> further includes a fifth shaping lens group <NUM>. The excitation light emitted by the second light source <NUM> enters into the light pipe <NUM> through the fifth shaping lens group <NUM>, the first beam splitter <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the function of the fifth shaping lens group <NUM> is to shape the excitation light emitted by the second light source <NUM>; the function of the first beam splitter <NUM> is to make the excitation light pass through after being shaped by the fifth shaping lens group <NUM>; and the function of the second beam splitter <NUM> is to make the excitation light pass through after passing through the first beam splitter <NUM>.

The color filter wheel <NUM> is the light path conversion element <NUM>, and its function is to filter the light to obtain a bright color. The first excited light (green light) is filtered by the color filter wheel <NUM> to obtain an greener light; the second excited light (yellow light) is filtered by the color filter wheel <NUM> to obtain a red light; and the excitation light (blue light) emitted by the second light source <NUM> directly passes through the color filter wheel <NUM>.

The first excited light excited by the first wavelength conversion device <NUM>, the second excited light excited by the second wavelength conversion device <NUM>, and the excitation light emitted by the second light source <NUM> will eventually enter into the light pipe <NUM>, so as to obtain three primary colors of RGB. The function of the light pipe <NUM> is to homogenize the light beams.

In addition, in this embodiment, the light source system <NUM> further includes a sixth shaping lens group <NUM>, a seventh shaping lens group <NUM>, and an eighth shaping lens group <NUM>.

The sixth shaping lens group <NUM> is disposed between the first light source <NUM> and the vibrating element <NUM>. The excitation light emitted by the first light source <NUM> irradiates the vibrating element <NUM> after being shaped by the sixth shaping lens group <NUM>.

The seventh shaping lens group <NUM> is disposed between the vibrating element <NUM> and the first wavelength conversion device <NUM>. Under a condition that the vibrating element <NUM> is at the first working position, the excitation light reflected by the vibrating element <NUM> irradiates the first wavelength conversion device <NUM> after being shaped by the seventh shaping lens group <NUM>.

The eighth shaping lens group <NUM> is disposed between the vibrating element <NUM> and the second wavelength conversion device <NUM>. Under a condition that the vibrating element <NUM> is at the second working position, the excitation light reflected by the vibrating element <NUM> irradiates the second wavelength conversion device <NUM> after being shaped by the eighth shaping lens group <NUM>.

It should be noted that the light path conversion element <NUM> may also make the excitation light emitted by the first light source <NUM> irradiate the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> in turn by other ways than rotating. For example, the light path conversion element <NUM> includes a first reflection element and a second reflection element. The first reflection element is a fixed element, and the second reflection element can move back and forth between a first position and a second position. Under a condition that the second reflection element is at the first position, the excitation light emitted by the first light source <NUM> is reflected by the first reflection element to the first wavelength conversion device <NUM>. Under a condition that the second reflection element is at the second position, the excitation light emitted by the first light source <NUM> is sequentially reflected by the first reflection element and the second reflection element to the second wavelength conversion device <NUM>.

As shown in <FIG>, this embodiment provides a light source system <NUM>. The differences between Embodiment <NUM> and Embodiment <NUM> described above are that the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> both are reflection type wavelength conversion devices, and the specific structures of the first light path turning system <NUM> and the second light path turning system <NUM> of the light combining unit <NUM> are different from those of Embodiment <NUM> described above.

The first wavelength conversion device <NUM> is the reflection type wavelength conversion device, that is, the first excited light excited after the excitation light irradiates the first wavelength conversion device <NUM> will be reflected by the first wavelength conversion device <NUM>; the second wavelength conversion device <NUM> is the reflection type wavelength conversion device, that is, the second excited light excited after the excitation light irradiates the second wavelength conversion device <NUM> will be reflected by the second wavelength conversion device <NUM>.

In this embodiment, the first light path turning system <NUM> includes a first shaping lens group <NUM>, a first reflector <NUM>, a second reflector <NUM>, a first beam splitter <NUM>, and a second shaping lens group <NUM>. The first excited light is reflected by the first wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the first shaping lens group <NUM>, the first reflector <NUM>, the second reflector <NUM>, the first beam splitter <NUM>, the second shaping lens group <NUM> and the color filter wheel <NUM> in sequence.

In this embodiment, under a condition that the vibrating element <NUM> is at the first working position, the excitation light reflected by the vibrating element <NUM> irradiates the first wavelength conversion device <NUM> after being shaped by the first shaping lens group <NUM>. That is, the first shaping lens group <NUM> can not only shape the excitation light reflected by the vibrating element <NUM>, but also shape the first excited light reflected by the first wavelength conversion device <NUM>.

The first reflector <NUM> and the second reflector <NUM> play a role of reflecting the first excited light; the first beam splitter <NUM> plays a role of making the first excited light pass through; and the second shaping lens group <NUM> plays a role of shaping the first excited light after passing through the first beam splitter <NUM>.

In this embodiment, the second light path turning system <NUM> includes a third shaping lens group <NUM> and a second beam splitter <NUM>. The second excited light is reflected by the second wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the third shaping lens group <NUM>, the second beam splitter <NUM>, the first beam splitter <NUM>, the second shaping lens group <NUM> and the color filter wheel <NUM> in sequence.

In this embodiment, under a condition that the vibrating element <NUM> is at the second working position, the excitation light reflected by the vibrating element <NUM> irradiates the second wavelength conversion device <NUM> after being shaped by the second shaping lens group <NUM>. That is, the second shaping lens group <NUM> can not only shape the excitation light reflected by the vibrating element <NUM>, but also shape the second excited light reflected by the second wavelength conversion device <NUM>.

The second beam splitter <NUM> plays a role of reflecting the second excited light; the first beam splitter <NUM> plays a role of reflecting the second excited light; and the second shaping lens plays a role of shaping the second excited light after being reflected by the first beam splitter <NUM>.

In this embodiment, the light source system <NUM> further has a second light source <NUM>. The light combining unit <NUM> is configured to combine the first excited light and the second excited light with an excitation light emitted by the second light source <NUM>. Here, the second light source <NUM> is a blue laser light source, and the excitation light emitted by the second light source <NUM> is a blue light.

The light combining unit <NUM> further includes a fourth shaping lens group <NUM>. The excitation light emitted by the second light source <NUM> enters into the light pipe <NUM> through the fourth shaping lens group <NUM>, the second beam splitter <NUM>, the first beam splitter <NUM>, the second shaping lens group <NUM> and the color filter wheel <NUM> in sequence.

Here, the fourth shaping lens group <NUM> plays a role of shaping the excitation light emitted by the second light source <NUM>; the second beam splitter <NUM> plays a role of making the excitation light pass through after being shaped by the fourth shaping lens group <NUM>; the first beam splitter <NUM> plays a role of reflecting the excitation light after passing through the second beam splitter <NUM>; and the second shaping lens group <NUM> plays a role of shaping the excitation light after being reflected by the first beam splitter <NUM>.

In this embodiment, the light source system <NUM> further includes a fifth shaping lens group <NUM>, and the fifth lens group is disposed between the first light source <NUM> and the vibrating element <NUM>. The excitation light emitted by the first light source <NUM> irradiates the vibrating element <NUM> after being shaped by the fifth shaping lens group <NUM>.

It should be noted that in this embodiment, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> both are reflection type wavelength conversion devices; in Embodiment <NUM> described above, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> both are transmission type wavelength conversion devices; in other embodiments, one of the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> may be a reflection type wavelength conversion device, and the other may be a transmission type wavelength conversion device.

As shown in <FIG>, this embodiment provides a light source system <NUM>. The differences between Embodiment <NUM> and Embodiment <NUM> described above are that the structure of the light path conversion element <NUM> is different, the specific structures of the first light path turning system <NUM> and the second light path turning system <NUM> of the light combining unit <NUM> are different, and there is only the first light source <NUM>.

In this embodiment, the light path conversion element <NUM> is a rotating wheel <NUM> that rotates around its own axis, and the rotating wheel <NUM> has a first working position and a second working position.

As shown in <FIG>, the rotating wheel <NUM> includes a first transmission area <NUM> and a first reflection area <NUM> arranged in a circumferential direction. The first light source <NUM> obliquely irradiates the rotating wheel <NUM>.

Continuing to refer to <FIG>, under a condition that the rotating wheel <NUM> is at the first working position, the excitation light emitted by the first light source <NUM> irradiates the first wavelength conversion device <NUM> after passing through the first transmission area <NUM>; under a condition that the rotating wheel <NUM> is at the second working position, the excitation light emitted by the first light source <NUM> irradiates the second wavelength conversion device <NUM> after being reflected by the first reflection area <NUM>.

The light path conversion element <NUM> is the rotating wheel <NUM> that rotates around its own axis. The rotating wheel <NUM> can be rotated to the first working position and the second working position, so that the excitation light emitted by the first light source <NUM> intermittently irradiates the first transmission area <NUM> and the first reflection area <NUM>. The excitation light emitted by the first light source <NUM> does not always irradiate the same wavelength conversion device, thereby reducing the heat dissipation pressure of the first wavelength conversion device and the second wavelength conversion device. Under a condition that the excitation light emitted by the first light source <NUM> irradiates the first transmission area, the excitation light will irradiate the first wavelength conversion device <NUM> after passing through the first transmission area <NUM>; under a condition that the excitation light emitted by the first light source <NUM> irradiates the first reflection area, the excitation light will irradiate the second wavelength conversion device <NUM> after being reflected by the first reflection area <NUM>.

In this embodiment, continuing to refer to <FIG>, the first transmission area <NUM> and the first reflection area <NUM> of the rotating wheel <NUM> both are fan-shaped. The first transmission area <NUM> and the first reflection area <NUM> each has two areas, the two first transmission areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>, and the two first reflection regions <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>.

It should be noted that the excitation light emitted by the first light source <NUM> may directly irradiate the second wavelength conversion device <NUM> after being reflected by the first reflection region <NUM>, or may indirectly irradiate the second wavelength conversion device <NUM> after being reflected by the first reflection region <NUM>.

In this embodiment, the excitation light emitted by the first light source <NUM> may indirectly irradiate the second wavelength conversion device <NUM> after being reflected by the first reflection area <NUM>, which will be described in detail below with reference to <FIG>.

As shown in <FIG>, the light source system <NUM> further includes a reflection element <NUM>.

Under a condition that the rotating wheel <NUM> is at the second working position, the excitation light emitted by the first light source <NUM> irradiates the second wavelength conversion device <NUM> after being reflected by the first reflection area <NUM> and the reflection element <NUM> sequentially.

Here, the reflection element <NUM> may be a reflector.

In this embodiment, the light combining unit <NUM> includes a first light path turning system <NUM>, a second light path turning system <NUM>, a color filter wheel <NUM> and a light pipe <NUM>. The first excited light enters into the light pipe <NUM> through the first light path turning system <NUM> and the color filter wheel <NUM> in sequence; and the second excited light enters into the light pipe <NUM> through the second light path turning system <NUM> and the color filter wheel <NUM> in sequence.

In this embodiment, the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> both are transmission type wavelength conversion devices.

Exemplarily, the first light path turning system <NUM> includes a first shaping lens group <NUM> and a first reflector <NUM>. The first excited light passes through the first wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the first shaping lens group <NUM>, the first reflector <NUM> and the color filter wheel <NUM> in sequence.

Here, the first shaping lens group <NUM> plays a role of shaping the first excited light after passing through the first wavelength conversion device <NUM>; and the first reflector <NUM> plays a role of reflecting the first excited light after being shaped by the first shaping lens group <NUM>.

The second light path turning system <NUM> includes a second shaping lens group <NUM>, a first beam splitter <NUM> and a second beam splitter <NUM>. The second excited light passes through the second wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the second shaping lens group <NUM>, the first beam splitter <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the second shaping lens group <NUM> plays a role of shaping the second excited light after passing through the second wavelength conversion device <NUM>; the first beam splitter <NUM> plays a role of making the second excited light pass through after being shaped by the second shaping lens group <NUM>; and the second beam splitter <NUM> plays a role of making the second excited light pass through after passing through the first beam splitter <NUM>.

In this embodiment, a third shaping lens group <NUM> is disposed between the first light source <NUM> and the rotating wheel <NUM>. The excitation light emitted by the first light source <NUM> irradiates the rotating wheel <NUM> after being shaped by the third shaping lens group <NUM>.

As shown in <FIG>, this embodiment provides a light source system <NUM>. The differences between Embodiment <NUM> and Embodiment <NUM> described above are that, as shown in <FIG>, the rotating wheel <NUM> further includes a second transmission area <NUM>, and the first reflection area <NUM> and the second transmission areas <NUM> are arranged along a radial direction of the rotating wheel <NUM>.

As shown in <FIG>, under a condition that the rotating wheel <NUM> is at the second working position, the excitation light emitted by the first light source <NUM> irradiates the second wavelength conversion device <NUM> after being reflected by the first reflection area <NUM>, reflected by the reflection element <NUM>, and passing through the second transmission area <NUM> sequentially.

The reflection element <NUM> can reflect the excitation light reflected by the first reflection area <NUM> to change the propagation path of the excitation light. This structure enables the first wavelength conversion device <NUM> and the second wavelength conversion device <NUM> to be located on the same side of the rotating wheel <NUM>, which makes the structure of the entire light source system <NUM> more compact.

In this embodiment, the rotating wheel <NUM> further has a third working position, that is, the rotating wheel <NUM> can be rotated to the third working position. Continuing to refer to <FIG>, the rotating wheel <NUM> further includes a second reflection area <NUM> and a third reflection area <NUM>, the first transmission area <NUM>, the first reflection area <NUM>, and the second reflection area <NUM> are arranged along the circumferential direction of the rotating wheel <NUM>, and the second reflection area <NUM> and the third reflection area <NUM> are distributed along the radial direction of the rotating wheel <NUM>.

Continuing to refer to <FIG>, under a condition that the rotating wheel <NUM> is at the third working position, the excitation light emitted by the first light source <NUM> is combined with the first excited light and the second excited light after being reflected by the second reflection area <NUM>, reflected by the reflection element <NUM>, and reflected by the third reflection area <NUM> sequentially. That is, the excitation light (blue light) emitted by the first light source <NUM>, the first excited light (green light) and the second excited light (yellow light) are finally combined under the action of the light combining unit <NUM>.

In this embodiment, the first transmission area <NUM>, the second transmission area <NUM>, the first reflection area <NUM>, the second reflection area <NUM>, and the third reflection area <NUM> are all fan-shaped. The first reflection area <NUM> is located at the inside of the second transmission area <NUM>, and the second reflection area <NUM> is located at the inside of the third reflection area <NUM>. There are two first transmission areas <NUM>, and the two first transmission areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two second transmission areas <NUM>, and the two second transmission areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two first reflection areas <NUM>, and the two first reflection areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two second reflection areas <NUM>, and the two second reflection areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two third reflection area <NUM>, and the two third reflection areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>.

The structures of the first light path turning system <NUM> and the second light path turning system <NUM> of the light combining unit <NUM> are the same as those of Embodiment <NUM> described above, which will not be repeated here.

In this embodiment, the light combining unit <NUM> further includes a second reflector <NUM> and a third reflector <NUM>. The excitation light is reflected by the third reflection area <NUM> of the rotating wheel <NUM>, and then enters into the light pipe <NUM> through the second reflector <NUM>, the third reflector <NUM>, the first beam splitter <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the second reflector <NUM> plays a role of reflecting the excitation light reflected by the third reflection area <NUM>; the third reflector <NUM> plays a role of reflecting the excitation light reflected by the second reflector <NUM>; the first beam splitter <NUM> plays a role of reflecting the excitation light reflected by the third reflector <NUM>; and the second beam splitter <NUM> plays a role of making the excitation light reflected by the first beam splitter <NUM> pass through.

As shown in <FIG>, this embodiment provides a light source system <NUM>. The differences between Embodiment <NUM> and Embodiment <NUM> described above are that the way in which the excitation light is reflected by the reflection element <NUM> to the second wavelength conversion device <NUM> is different.

In this embodiment, as shown in <FIG>, the rotating wheel <NUM> further includes a second reflection area <NUM>, and the first reflection area <NUM> and the second reflection area <NUM> are arranged along the radial direction of the rotating wheel <NUM>.

Continuing to refer to <FIG>, under a condition that the rotating wheel <NUM> is at the second working position, the excitation light emitted by the first light source <NUM> irradiates the second wavelength conversion device <NUM> after being reflected by the first reflection area <NUM>, reflected by the reflection element <NUM>, and reflected by the second reflection area <NUM> sequentially.

In this embodiment, the second wavelength conversion device <NUM> is the reflection type wavelength conversion device.

Further, the rotating wheel <NUM> also has a third working position, that is, the rotating wheel <NUM> can be rotated to the third working position. Continuing to refer to <FIG>, the rotating wheel <NUM> further includes a third reflection area <NUM> and a second transmission area <NUM>. The first transmission area <NUM>, the first reflection area <NUM> and the third reflection area <NUM> are arranged along the circumferential direction of the rotating wheel <NUM>, and the third reflection area <NUM> and the second transmission area <NUM> are distributed along the radial direction of the rotating wheel <NUM>.

Continuing to refer to <FIG>, under a condition that the rotating wheel <NUM> is at the third working position, the excitation light emitted by the first light source <NUM> is combined with the first excited light and the second excited light after being reflected by the third reflection area <NUM>, reflected by the reflection element <NUM>, and passing through the second transmission area <NUM> sequentially.

In this embodiment, the first transmission area <NUM>, the second transmission area <NUM>, the first reflection area <NUM>, the second reflection area <NUM>, and the third reflection area <NUM> are all fan-shaped. The first reflection area <NUM> is located at the inside of the second reflection area <NUM>, and the third reflection area <NUM> is located at the inside of the second transmission area <NUM>. There are two first transmission areas <NUM>, and the two first transmission areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two second transmission areas <NUM>, and the two second transmission areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two first reflection areas <NUM>, and the two first reflection areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There are two second reflection areas <NUM>, and the two second reflection areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>. There two third reflection areas <NUM>, and the two third reflection areas <NUM> are center-symmetric about the center axis of the rotating wheel <NUM>.

The structure of the first light path turning system <NUM> of the light combining unit <NUM> is the same as that of Embodiment <NUM> described above, and its description not be repeated here.

The second light path turning system <NUM> includes a second shaping lens group <NUM>, a second reflector <NUM>, a first beam splitter <NUM> and a second beam splitter <NUM>. The second excited light is reflected by the second wavelength conversion device <NUM>, and then enters into the light pipe <NUM> through the second shaping lens group <NUM>, the second reflector <NUM>, the first beam splitter <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the second shaping lens group <NUM> plays a role of shaping the second excited light after being reflected by the second wavelength conversion device <NUM>; the second reflector <NUM> plays a role of reflecting the second excited light after being shaped by the second shaping lens group <NUM>; the first beam splitter <NUM> plays a role of reflecting the second excited light after being reflected by the second reflector <NUM>; and the second beam splitter <NUM> plays a role of making the second excited light pass through after being reflected by the first beam splitter <NUM>.

In this embodiment, the excitation light passes through the second transmission area <NUM> of the rotating wheel <NUM>, and then enters into the light pipe <NUM> through the first beam splitter <NUM>, the second beam splitter <NUM> and the color filter wheel <NUM> in sequence.

Here, the first beam splitter <NUM> plays a role of making the excitation light pass through after passing through the second transmission area <NUM>; and the second beam splitter <NUM> plays a role of making the excitation light pass through after passing through the first beam splitter <NUM>.

This embodiment provides a projector system, including the light source system <NUM> in any of the above embodiments. Other structures in the projector system except for the light source system <NUM> can be referred to the related arts, which will not be repeated here.

Claim 1:
A light source system (<NUM>), characterized by comprising:
a first light source (<NUM>);
a first wavelength conversion device (<NUM>) capable of being excited by an excitation light emitted by the first light source (<NUM>) to generate a first excited light;
a second wavelength conversion device (<NUM>) capable of being excited by the excitation light emitted by the first light source (<NUM>) to generate a second excited light, wherein the first wavelength conversion device (<NUM>) and the second wavelength conversion device (<NUM>) both are monochromatic fluorescent wheels;
a light path conversion element (<NUM>) configured to make the excitation light emitted by the first light source (<NUM>) irradiate the first wavelength conversion device (<NUM>) and the second wavelength conversion device (<NUM>) in turn; and
a light combining unit (<NUM>) configured to combine the first excited light with the second excited light;
wherein the light path conversion element (<NUM>) is a rotating wheel (<NUM>) that rotates around its own axis, and the rotating wheel (<NUM>) has a first working position and a second working position;
the rotating wheel (<NUM>) comprises a first transmission area (<NUM>) and a first reflection area (<NUM>) arranged in a circumferential direction, the rotating wheel (<NUM>) further comprises a second transmission area (<NUM>), and the first reflection area (<NUM>) and the second transmission area (<NUM>) are arranged along a radial direction of the rotating wheel (<NUM>);
the light source system (<NUM>) further comprises a reflection element (<NUM>);
the first light source (<NUM>) obliquely irradiates the rotating wheel (<NUM>);
under a condition that the rotating wheel (<NUM>) is at the first working position, the excitation light emitted by the first light source (<NUM>) irradiates the first wavelength conversion device (<NUM>) after passing through the first transmission area (<NUM>);
under a condition that the rotating wheel (<NUM>) is at the second working position, the excitation light emitted by the first light source (<NUM>) irradiates the second wavelength conversion device (<NUM>) after being reflected by the first reflection area (<NUM>), reflected by the reflection element (<NUM>), and passing through the second transmission area (<NUM>) sequentially.