CN219831614U - Light source system and projection equipment - Google Patents
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- CN219831614U CN219831614U CN202321057304.2U CN202321057304U CN219831614U CN 219831614 U CN219831614 U CN 219831614U CN 202321057304 U CN202321057304 U CN 202321057304U CN 219831614 U CN219831614 U CN 219831614U
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Abstract
The utility model relates to the technical field of display, and discloses a light source system and projection equipment, wherein light generated by a light source in the light source system is guided into a light conversion assembly through a dichroic element and a beam converging element, and the light conversion assembly comprises an excitation area, a light-transmitting heat conducting layer and a reflecting layer; the light-transmitting heat-conducting layer can improve heat dissipation efficiency; the light in the opposite direction generated by excitation of the excitation area can be reflected by the reflection layer to recover the beam element, so that the excitation efficiency of the excitation area can be improved, and the brightness of the projection device can be improved.
Description
Technical Field
The present utility model relates to the field of projection display technologies, and in particular, to a light source system and a projection device.
Background
In projection display products, the light source system is a very important component, and its function is to convert light rays of different colors, different angular distributions, different brightness and different shapes into a uniform spot of light that irradiates the active area of the display chip.
In the field of projection display, conventional bulbs have not been adopted due to their own defects, and novel light sources such as LEDs, phosphors, and lasers have been increasingly becoming the main stream of light sources for projection display because they exhibit excellent characteristics in terms of brightness, color, lifetime, energy consumption, and the like. In these new light source technologies, it is difficult for LED light sources to achieve high brightness, while laser light sources suffer from speckle. Therefore, how to realize high-quality image quality with high brightness is a problem to be solved.
Disclosure of Invention
The utility model provides a light source system which can be used for projection equipment, can improve heat dissipation efficiency and can improve excitation efficiency of an excitation area, so that brightness of the projection equipment can be improved.
In a first aspect, the present utility model provides a light source system,
the light source system comprises a light source, a dichroic element, a beam converging element and a light conversion assembly, wherein the light conversion assembly comprises a reflecting layer and at least two excitation areas which are excited to generate light with different wave bands;
the first light generated by the light source is emitted into an excitation area of the light conversion assembly through the dichroic element and the beam converging element, and the excitation area of the light conversion assembly is excited to generate second light; light facing the dichroic element in the second light exits after passing through the converging element and the dichroic element; light of the second light, which is directed away from the dichroic element, is reflected by the reflective layer of the light conversion assembly, and the recycled beam element and the dichroic element, and exits through the dichroic element.
In some embodiments, the reflective layer of the light conversion component is a metal substrate layer or a reflective or dichroic film.
In some embodiments, a light-transmitting and heat-conducting layer is arranged between the reflecting layer and the excitation area of the light-converting component, and the light-transmitting and heat-conducting layer is a silicon carbide (SiC) layer or an aluminum nitride (AIN) layer or a silicon nitride (SiN) layer or a diamond layer or a sapphire substrate or a transparent graphene substrate or a glass substrate, and a benzene type polyimide film and a biphenyl type polyimide film are plated on the light-transmitting and heat-conducting layer.
In some embodiments, the optical conversion assembly further comprises a phase conversion region therein;
the first light generated by the light source is in a first polarization state, and the first light in the first polarization state is injected into the phase conversion area of the light conversion component and the reflecting layer of the light conversion component through the dichroic element and the beam-receiving element, and is reflected back to the phase conversion area of the light conversion component through the reflecting layer of the light conversion component, so that the first light is converted into a second polarization state, and is injected into the beam-receiving element and the dichroic element and then is emitted.
In some embodiments, a diffuser is included in the phase conversion region of the light conversion assembly for speckle suppression of the first light.
In some embodiments, the optical conversion assembly includes a phase conversion element positioned between the converging element and the non-excitation region of the optical conversion assembly;
the first light generated by the light source is in a first polarization state, the first light in the first polarization state is injected into the phase conversion element through the dichroic element and the beam-receiving element, is injected into the non-excitation area and the reflecting layer of the light conversion assembly through the phase conversion element, is reflected back to the phase conversion element through the reflecting layer of the light conversion assembly, so that the first light is converted into a second polarization state, and is injected into the beam-receiving element and the dichroic element and then is emitted.
In some embodiments, the dichroic element reflects or transmits the first light of the first polarization state and transmits or reflects the first light of the second polarization state.
In some embodiments, the dichroic element reflects or transmits the first light of the first polarization state of the target band, and transmits or reflects the first light of the second polarization state of the target band.
In some embodiments, the light source system further comprises a first reflective element;
the first light generated by the light source is transmitted through the dichroic element and the beam-converging element to enter the non-excitation area and the reflecting layer of the light conversion assembly, the beam-converging element and the dichroic element are reflected by the reflecting layer of the light conversion assembly, transmitted through the dichroic element to enter the first reflecting element, reflected by the first reflecting element to the dichroic element and then emitted.
In some embodiments, the non-excitation region of the light conversion assembly is coated with a brightness enhancement film for increasing the transmittance of the first light; and/or a diffusion sheet is included in the non-excitation region of the light conversion assembly, the diffusion sheet being for speckle suppression of the first light.
In some embodiments, the reflective layer in the light conversion assembly is a second reflective element;
the second reflecting element is a rotating parabolic element with an opening facing the excitation area of the light conversion component, the excitation area of the light conversion component is positioned on the focus of the second reflecting element, and light of the second light, which is opposite to the dichroic element, is reflected by the second reflecting element and then is parallel to the recycling beam element;
or the second reflecting element is an element with an opening facing the ellipsoid of rotation of the excitation area of the light conversion component, the excitation area of the light conversion component is positioned on the first focus of the second reflecting element, and the light which is back to the dichroic element in the second light is reflected by the second reflecting element and then converged on the second focus of the second reflecting element, and is emitted into the beam converging element after passing through the second focus.
In some embodiments, the light source system further comprises a supplemental light source;
the supplementary light generated by the supplementary light source is emitted after passing through the dichroic element and the second photosynthetic light.
In some embodiments, the light conversion element includes at least two excitation regions that produce excited light of different wavelength bands, and the light conversion element is fully covered or partially covered by the excitation material in the at least two excitation regions that produce excited light of different wavelength bands.
In some embodiments, the dichroic element is at a preset angle to the optical axis of the light conversion element.
In a second aspect, the present utility model provides a projection device, including the light source system according to the first aspect and any one of the possible implementation manners of the first aspect.
In the light source system, light generated by a light source is guided into a light conversion assembly through a dichroic element and a beam converging element, wherein the light conversion assembly comprises an excitation area, a light-transmitting heat-conducting layer and a reflecting layer; the light-transmitting heat-conducting layer can improve heat dissipation efficiency; the light in the opposite direction generated by excitation of the excitation area can be reflected by the reflection layer to recover the beam element, so that the excitation efficiency of the excitation area can be improved, and the brightness of the projection device can be improved.
Drawings
The above and other objects, features and advantages of the present utility model will become more apparent from the following more particular description of embodiments of the present utility model, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, and not constitute a limitation to the utility model. In the drawings, like reference numerals generally refer to like parts or steps. Wherein:
FIG. 1 is a schematic illustration of the optical characteristics of a dichroic element in an embodiment of the present utility model;
FIG. 2 is a schematic diagram of a light source system according to an embodiment of the utility model;
FIG. 3 is a schematic view of a light source system according to another embodiment of the present utility model;
FIG. 4 is a schematic diagram of a light source system according to another embodiment of the present utility model;
FIG. 5 is a schematic view of a light source system according to another embodiment of the present utility model;
fig. 6 is a schematic structural diagram of a projection apparatus according to an embodiment of the present utility model.
Detailed Description
In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure may be separately implemented as a complete solution. The following embodiments and features of the embodiments may be combined with each other without conflict.
In embodiments of the utility model, words such as "exemplary," "such as" and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.
Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The term "and/or" includes any and all combinations of one or more of the associated listed items.
In order that the utility model may be fully understood, a detailed description will be provided below in order to illustrate the technical aspects of the utility model. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.
The embodiment provides a light source system, which comprises a light source, a dichroic element, a beam converging element and a light conversion assembly, wherein the light conversion assembly comprises a reflecting layer and at least two excitation areas which are excited to generate light with different wave bands;
the first light generated by the light source is emitted into an excitation area of the light conversion assembly through the dichroic element and the beam converging element, and the excitation area of the light conversion assembly is excited to generate second light; light facing the dichroic element in the second light exits after passing through the converging element and the dichroic element; light of the second light, which is directed away from the dichroic element, is reflected by the reflective layer of the light conversion assembly, and the recycled beam element and the dichroic element, and exits through the dichroic element.
The light source can be an LED light source or a laser light source. The first light generated by the light source may be blue light, UV light, etc. The converging element may be a lens.
Optionally, the dichroic element is at a preset angle to the optical axis of the light converting element; the preset angle can be set in a self-defined mode according to practical application conditions, and can be 45 degrees for example.
Optionally, the light conversion element comprises at least two excitation regions generating excited light of different wavelength bands, and the light conversion element is fully covered or partially covered by the excitation material in the at least two excitation regions generating excited light of different wavelength bands. The excitation material can be phosphor, etc., such as red phosphor, yellow phosphor, green phosphor, cyan phosphor, etc. For example, only a red excitation region generating light in a red light band and a green excitation region generating light in a green light band are included in the light conversion element, and the light conversion element is fully covered or partially covered with red phosphor or yellow phosphor and green phosphor.
Optionally, at least two of a blue excitation region generating light in a blue light band, a red excitation region generating light in a red light band, a yellow excitation region generating light in a yellow light band, a cyan excitation region generating light in a cyan light band, and a green excitation region generating light in a green light band in the light conversion assembly. The second light may be at least two of red light, green light, yellow light, cyan light, and blue light.
Optionally, the reflective layer of the light conversion component is a metal substrate layer or a reflective film or a dichroic film; the dichroic film may reflect the first light and all of the second light, or the dichroic film may be in one-to-one correspondence with the excitation area, and reflect the second light and the first light in the wavelength band generated by the corresponding excitation area, transmitting the other light. The reflection efficiency of the excitation light can be improved by reflecting the first light (excitation light) by the reflection layer; the reflection layer reflects the second light (excited light) in opposite directions, so that the excitation efficiency of the excitation area can be improved.
In some embodiments, a light-transmitting and heat-conducting layer is arranged between the reflecting layer and the excitation area of the light-converting component, and the light-transmitting and heat-conducting layer is a silicon carbide (SiC) layer or an aluminum nitride (AIN) layer or a silicon nitride (SiN) layer or a diamond layer or a sapphire substrate or a transparent graphene substrate or a glass substrate, and a benzene type polyimide film and a biphenyl type polyimide film are plated on the light-transmitting and heat-conducting layer. The light-transmitting heat-conducting layer can improve the heat dissipation effect of the light source system.
Alternatively, the excitation region, the light-transmissive heat-conducting layer and the reflective layer may be disposed in close proximity. Optionally, the light source system includes a driving device, and the driving device is used for driving the light-transmitting heat-conducting layer or the light-transmitting heat-conducting layer and the reflecting layer. For example, the reflective layer is a metal substrate, and the driving device may only drive the light-transmitting and heat-conducting layer, so that each excitation region is located on the optical path of the first light, and thus the second light with different wavebands is excited by the first light. For another example, the reflecting layer is a reflecting film or a dichroic film, and the reflecting film or the dichroic film is plated on the side of the non-excitation area of the light-transmitting heat-conducting layer; the driving device can only drive the light-transmitting heat-conducting layer and the reflecting layer, so that each excitation area is alternately positioned on the light path of the first light (namely, the first light is alternately injected into each excitation area) at different time sequences, and therefore the second light with different wave bands is excited by the first light.
In some embodiments, the optical conversion assembly further comprises a phase conversion region therein; the first light generated by the light source is in a first polarization state, and the first light in the first polarization state is injected into the phase conversion area of the light conversion component and the reflecting layer of the light conversion component through the dichroic element and the beam-receiving element, and is reflected back to the phase conversion area of the light conversion component through the reflecting layer of the light conversion component, so that the first light is converted into a second polarization state, and is injected into the beam-receiving element and the dichroic element and then is emitted. The first polarization state and the second polarization state are not limited, for example, the first polarization state may be a P-th state or an S-th state, and the second polarization state may be an S-state or a P-state. The phase conversion region is not limited, and may be, for example, a 1/4 wave plate; optionally, the phase conversion region may be disposed in close proximity to the light-transmitting and heat-conducting layer, and the driving device may drive the light-transmitting and heat-conducting layer to locate the phase conversion region on the light path of the first light (i.e. the first light enters the phase conversion region), and the first light may be transmitted through the phase conversion region twice by reflection of the reflection layer, thereby converting the first polarization state into the second polarization state.
Optionally, the dichroic element reflects or transmits the first light of the first polarization state, transmits or reflects the first light of the second polarization state; the dichroic element may transmit or reflect the second light.
Optionally, the dichroic element reflects or transmits the first light of the first polarization state of the target band, transmits or reflects the first light of the second polarization state of the target band, or may transmit or reflect a portion of the first light of the second polarization state of the target band; the target band is not limited. For example, as shown in FIG. 1, is an optical feature of a dichroic elementSchematic of the property, wherein the ordinate indicates the transmittance, the abscissa indicates the wavelength, the P light indicates the light of the P polarization state, and the S light indicates the light of the S polarization state; the target band may be included in W 1 -W 2 Is a kind of medium.
Optionally, the phase conversion region of the light conversion component further comprises a diffusion sheet, and the diffusion sheet is used for performing speckle suppression on the first light; alternatively, the diffusion sheet may be disposed between the phase conversion region and the light-transmitting heat conductive layer, or may be disposed between the light-transmitting heat conductive layer and the reflective layer.
In some embodiments, the optical conversion assembly includes a phase conversion element positioned between the converging element and the non-excitation region of the optical conversion assembly; the first light generated by the light source is in a first polarization state, the first light in the first polarization state is injected into the phase conversion element through the dichroic element and the beam-receiving element, is injected into the non-excitation area and the reflecting layer of the light conversion assembly through the phase conversion element, is reflected back to the phase conversion element through the reflecting layer of the light conversion assembly, so that the first light is converted into a second polarization state, and is injected into the beam-receiving element and the dichroic element and then is emitted. Wherein the phase conversion element may be a 1/4 wave plate.
Optionally, the dichroic element reflects or transmits the first light of the first polarization state, transmits or reflects the first light of the second polarization state; the dichroic element may transmit or reflect the second light.
Optionally, the non-excitation area of the light conversion component is plated with a brightness enhancement film, and the brightness enhancement film is used for increasing the transmittance of the first light; the brightness enhancement film is plated on the light-transmitting heat-conducting layer. And/or the non-excitation region of the light conversion component comprises a diffusion sheet, wherein the diffusion sheet is used for carrying out speckle suppression on the first light; the diffusion sheet is tightly attached to the light-transmitting heat-conducting layer. The driving device can drive the light-transmitting heat-conducting layer to enable the non-excitation area to be located on the light path of the first light, and the first light can be enabled to penetrate the phase conversion element and the non-excitation area twice through reflection of the reflecting layer, so that the first polarization state is converted into the second polarization state, and brightness is improved and/or speckle suppression is carried out. It is understood that the non-excitation region may be provided without any element, and the first light passing through the phase conversion element may directly enter the reflective layer of the light conversion element.
In some embodiments, the light source system further comprises a first reflective element; the first light generated by the light source is transmitted through the dichroic element and the beam-converging element to enter the non-excitation area and the reflecting layer of the light conversion assembly, the beam-converging element and the dichroic element are reflected by the reflecting layer of the light conversion assembly, transmitted through the dichroic element to enter the first reflecting element, reflected by the first reflecting element to the dichroic element and then emitted. Wherein the first reflective element may be a small mirror. The dichroic element may transmit the first light and reflect the second light.
In some embodiments, the reflective layer in the light conversion assembly is a second reflective element; the second reflecting element is a rotating parabolic element with an opening facing the excitation area of the light conversion component, the excitation area of the light conversion component is positioned on the focus of the second reflecting element, and light of the second light, which is opposite to the dichroic element, is reflected by the second reflecting element and then is parallel to the recycling beam element;
or the second reflecting element is an element with an opening facing the ellipsoid of rotation of the excitation area of the light conversion component, the excitation area of the light conversion component is positioned on the first focus of the second reflecting element, and the light which is back to the dichroic element in the second light is reflected by the second reflecting element and then converged on the second focus of the second reflecting element, and is emitted into the beam converging element after passing through the second focus.
In some embodiments, the light source system further comprises a supplemental light source; the supplementary light generated by the supplementary light source is emitted after passing through the dichroic element and the second photosynthetic light.
The supplemental light may include any one or more of blue light, red light, and green light, and may be light generated by an LED light source and/or a laser light source. For example, if the light conversion assembly includes only a red excitation region that generates a red wavelength band and a green excitation region that generates a green wavelength band, the supplemental light may be blue light.
Alternatively, the supplemental light source may include a laser light source, for example, the supplemental light source may be one or more of a blue laser light source, a red laser light source, a green laser light source, and some necessary light combining elements, focusing collimating lens groups, and the like. The supplemental light may include any one or more of blue, red, and green lasers.
Optionally, the supplemental light source may include an LED light source, and some necessary light combining elements, focusing collimating lens groups, and the like. For example, the supplementary light source may include a light source 1, a light source 2, an excitation light source, and a light combining element, where a light beam generated by the excitation light source is incident on the light source 2 through the light combining element, the light source 2 is excited to generate excited light, the excited light is incident on the dichroic element through the light combining element, and the excited light may be green light; the light beam generated by the light source 1 is incident on the dichroic element through the light combining element, and the light beam generated by the light source 1 can be blue light or red light. The supplemental light includes a light beam generated by the light source 1 and stimulated luminescence.
Alternatively, the supplemental light source may be a hybrid light source including an LED light source and a laser light source.
Alternatively, the dichroic element may include a target area, which may be an AR coated area or a transmissive diffuser, a light-passing hole, or the like, and may transmit or reflect the supplemental light.
In some embodiments, the light source system further includes a light homogenizing element, a focusing and collimating lens group, and the embodiment is not limited.
For example, fig. 2 is a schematic structural diagram of a light source system according to the present embodiment. As shown in fig. 2, the light source system includes a light source 10, a dichroic element 20, a beam converging element 30, and a light conversion assembly 40, and the light conversion assembly 40 includes an excitation region 41, a phase conversion region 42, a light-transmitting heat-conducting layer 43 (sapphire substrate), and a reflective layer 44 (metal substrate). The light source system also comprises a driving device (shown in the figure); the excitation region 41 includes a red excitation region generating a red band and a green excitation region generating a green band; the first light generated by the light source 10 is blue laser light in the P-state.
When the light source system is required to generate red light, blue laser generated by the light source 10 is emitted into the light conversion assembly 40 through the dichroic element 20 and the beam converging element 30, the driving device drives the sapphire substrate 43 to make the blue light enter the red excitation area, and the red excitation area is excited to generate red light; light of the red light that faces the dichroic element 20 exits through the converging element 30 and the dichroic element 20; light, which is directed away from the dichroic element 20, of the red light is reflected by the sapphire substrate 43, and then reflected by the metal substrate 44 to be recovered into the beam element 30 and the dichroic element 20, and then emitted through the dichroic element 20. Similarly, when the light source system is required to generate green light, the driving device drives the sapphire substrate 43 to make blue light enter the green excitation area.
When the light source system is required to generate blue light, the blue light generated by the light source 10 is in p-state, the p-state blue light is emitted into the light conversion component 40 through the dichroic element 20 and the beam-converging element 30, the driving device drives the sapphire substrate 43 to enable the blue light to be emitted into the phase conversion region 42, the light-transmitting heat conducting layer 43 and the reflecting layer 44, and the blue light is reflected back to the phase conversion region 42 of the light conversion component through the reflecting layer 44, so that the blue light is converted into S-state, emitted into the beam-converging element 30 and the dichroic element 20, and then emitted.
Fig. 3 is a schematic structural diagram of a light source system according to the present embodiment. In contrast to fig. 2, the phase-converting region in the light source system shown in fig. 3 is replaced with a phase-converting element 42, the phase-converting element 42 being separated from the light-transmitting heat-conducting layer 43. The non-excitation area of the light conversion component, namely the part of the light transmission heat conduction layer, which is not provided with the excitation area, is plated with a brightness enhancement film.
Therefore, when the light source system is required to generate blue light, the blue light generated by the light source 10 is in p-state, the blue light in p-state is injected into the phase conversion element 42 through the dichroic element 20 and the beam-converging element 30, is injected into the light conversion element 40 through the phase conversion element 42, the driving device drives the sapphire substrate 43 to make the blue light enter the non-excitation area and the reflection layer 44, and is reflected back to the phase conversion element 42 through the reflection layer 44 of the light conversion element, so that the blue light is converted into S-state, and is injected into the beam-converging element 30 and the dichroic element 20 and then is emitted.
Alternatively, the phase-converting element 42 may have a corresponding driving device, which drives the phase-converting element 42 out of the optical path of the light source system when the light source system generates red light and green light; when the light source system generates blue light, the phase conversion element 42 is driven to be positioned on the light path of the light source system.
Fig. 4 is a schematic structural diagram of a light source system according to the present embodiment. In contrast to fig. 2, the light source system shown in fig. 4 includes the first reflecting element 50, and the blue laser light generated by the light source 10 does not limit the polarization state.
Blue laser light generated by the light source 10 is transmitted through the dichroic element 20 and the beam-converging element 30 to enter the light conversion group 40, the driving device drives the sapphire substrate 43 to enable the blue light to enter the non-excitation area and the reflecting layer 44, the blue light is reflected by the reflecting layer 44 of the light conversion assembly to be reflected by the beam-converging element 30 and the dichroic element 20, transmitted through the dichroic element 30 to enter the first reflecting element 50, reflected by the first reflecting element 50 to the dichroic element 30 and then emitted.
Fig. 5 is a schematic structural diagram of a light source system according to the present embodiment. In contrast to fig. 2, the reflective layer in the light source system shown in fig. 5 is a second reflective element 44 separate from the light transmissive, thermally conductive layer. The second reflective element 44 is a rotating parabolic element with an opening facing the excitation area of the light conversion assembly, the excitation area 41 of the light conversion assembly being located at the focal point of the second reflective element 44, the light of the generated red or green light facing away from the dichroic element 20 being reflected by the second reflective element 44 back towards the recycling beam element 30.
It should be noted that, in fig. 2-5, a part of the corresponding transmission function is changed into reflection, and a part of the reflection function is changed into transmission, so that the function implementation of the whole light path is not affected, and the embodiment of the present utility model will not be described in detail.
As can be seen from the above, in the light source system provided in this embodiment, light generated by the light source is led into the light conversion component through the dichroic element and the beam-converging element, and the light conversion component includes an excitation area, a light-transmitting heat-conducting layer and a reflecting layer; the light-transmitting heat-conducting layer can improve heat dissipation efficiency; the light in the opposite direction generated by excitation of the excitation area can be reflected by the reflection layer to recover the beam element, so that the excitation efficiency of the excitation area can be improved, and the brightness of the projection device can be improved.
Fig. 6 is a schematic functional block diagram of a projection device according to an embodiment of the present utility model. As shown in fig. 6, the projection apparatus includes an image processor 101 and a projection light machine 102. Wherein:
the image processor 101 may be a microcontroller, a dedicated image processing chip, etc., and the microcontroller may be an ARM chip, a Micro Control Unit (MCU), etc.; the dedicated Image processing chip may be an Image signal processor (Image SignalProcessing, ISP), a Graphics Processor (GPU), an embedded neural Network Processor (NPU), or the like. The image processor 101 may be used for video decoding, image quality processing, and the like.
The projection light engine 102 may include a driver chip, a spatial light modulator, a light source system as described in the above embodiments, and the like. Wherein the spatial light modulator may be a digital micromirror device (DigtialMicromirrorDevices, DMD), a Liquid crystal device (Liquid CrystalDisplay, LCD), a Liquid crystal on silicon device (LiquidCrystalonSilicon, LCOS), or the like; the driver chip corresponds to a spatial light modulator, for example, a digital micromirror device may be driven with a digital light processing element (DigitalLightProcessing, DLP). The projection light machine 102 is used for projecting an image to be projected into a projection screen.
In some embodiments, the projection device further includes a central controller 103, which may be a CPU, ARM, MCU or like controller, of one or more processing cores. The central controller 103 is a control center of the projection device, and may run or execute software programs and/or an operating system stored in the memory 104 and invoke data stored in the memory 104, using various interfaces and lines to connect various parts of the entire projection device. Alternatively, the image processor 101 and the central controller 103 may be integrated as one processor.
In some embodiments, the projection device further includes memory 104 of one or more computer-readable storage media, input module 105, and communication module 106, power supply 107, and the like. It will be appreciated by those skilled in the art that the projection device structure shown in FIG. 1 is not limiting of the projection device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:
the memory 104 may be used to store software programs and an operating system, and the central controller 103 executes various functional applications and data processing by running the software programs and the operating system stored in the memory 104. The memory 104 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the projection device, etc. In addition, the memory 104 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory 104 may also include a memory controller to provide access to the memory 104 by the central controller 103.
The projection device may further comprise an input module 105, which input module 105 may be used to receive entered numerical or character information and to generate remote control, keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.
The projection device may also include a communication module 106, and in some embodiments the communication module 106 may include a wireless module, through which the projection device may wirelessly transmit over short distances, thereby providing wireless broadband internet access to the user. For example, the communication module 106 may be used to assist a user in accessing streaming media, and the like.
The projection device further includes a power supply 107 for powering the various components, and in some embodiments, the power supply 107 may be logically connected to the central controller 103 via a power management system, such that charge, discharge, and power consumption management functions are performed by the power management system. The power supply 107 may also include one or more of any of a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.
It is noted that the terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the associated object is an "or" relationship.
The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.
Claims (15)
1. A light source system comprising a light source, a dichroic element, a converging element, and a light conversion assembly comprising a reflective layer and at least two excitation regions that are excited to produce light of different wavebands;
the first light generated by the light source is emitted into an excitation area of the light conversion component through the dichroic element and the beam converging element, and the excitation area of the light conversion component is excited to generate second light; light facing the dichroic element of the second light exits after passing through the converging element and the dichroic element; light of the second light, which is opposite to the dichroic element, is reflected back to the beam-converging element and the dichroic element by the reflecting layer of the light conversion assembly, and exits after passing through the dichroic element.
2. The light source system of claim 1, wherein the reflective layer of the light conversion assembly is a metallic substrate layer or a reflective film or a dichroic film.
3. The light source system according to claim 2, wherein a light-transmitting and heat-conducting layer is disposed between the reflecting layer and the excitation region of the light conversion component, and the light-transmitting and heat-conducting layer is a silicon carbide (SiC) layer or an aluminum nitride (AIN) layer or a silicon nitride (SiN) layer or a diamond layer or a sapphire substrate or a transparent graphene substrate or a glass substrate, and is plated with a benzene-type polyimide film and a biphenyl-type polyimide film.
4. The light source system of claim 1, wherein the light conversion assembly further comprises a phase conversion region therein;
the first light generated by the light source is in a first polarization state, and the first light in the first polarization state is injected into the phase conversion area of the light conversion component and the reflecting layer of the light conversion component through the dichroic element and the beam-converging element, and is reflected back to the phase conversion area of the light conversion component through the reflecting layer of the light conversion component, so that the first light is converted into a second polarization state, and is injected into the beam-converging element and the dichroic element and then emitted.
5. The light source system of claim 4, wherein the light conversion assembly includes a diffuser in the phase conversion region for speckle reduction of the first light.
6. The light source system of claim 1, wherein the light conversion assembly includes a phase conversion element therein, the phase conversion element being located between the converging element and a non-excitation region of the light conversion assembly;
the first light generated by the light source is in a first polarization state, and the first light in the first polarization state enters the phase conversion element through the dichroic element and the beam-converging element, enters the non-excitation area and the reflecting layer of the light conversion component through the phase conversion element, and is reflected back to the phase conversion element through the reflecting layer of the light conversion component, so that the first light is converted into a second polarization state, enters the beam-converging element and the dichroic element and exits.
7. The light source system of claim 4 or 6, wherein the dichroic element reflects or transmits first light of a first polarization state and transmits or reflects first light of a second polarization state.
8. The light source system of claim 4 or 6, wherein the dichroic element reflects or transmits first light of a first polarization state of the target band and transmits or reflects first light of a second polarization state of the target band.
9. The light source system of claim 1, further comprising a first reflective element;
the first light generated by the light source is transmitted through the dichroic element and the beam-collecting element to enter the non-excitation area and the reflecting layer of the light conversion assembly, is reflected back to the beam-collecting element and the dichroic element through the reflecting layer of the light conversion assembly, is transmitted through the dichroic element to enter the first reflecting element, is reflected to the dichroic element through the first reflecting element and is emitted.
10. The light source system of claim 6 or 9, wherein the non-excitation region of the light conversion assembly is coated with a brightness enhancement film for increasing the transmittance of the first light; and/or, the non-excitation area of the light conversion component comprises a diffusion sheet, and the diffusion sheet is used for carrying out speckle suppression on the first light.
11. The light source system of claim 1, wherein the reflective layer in the light conversion assembly is a second reflective element;
the second reflecting element is a rotating parabolic element with an opening facing the excitation area of the light conversion component, the excitation area of the light conversion component is positioned on the focus of the second reflecting element, and light which is opposite to the dichroic element in the second light is reflected by the second reflecting element and then is parallel-shot back to the beam converging element;
or, the second reflecting element is an ellipsoidal element with an opening facing the excitation area of the light conversion component, the excitation area of the light conversion component is located at the first focus of the second reflecting element, the light of the second light, which is opposite to the dichroic element, is reflected by the second reflecting element and then converged at the second focus of the second reflecting element, and is injected into the beam converging element after passing through the second focus.
12. The light source system of claim 1, further comprising a supplemental light source therein;
the light source is arranged on the first light source, and the light source is arranged on the second light source.
13. The light source system of claim 1, wherein the light conversion assembly comprises at least two excitation regions that produce different bands of excited light, and wherein the light conversion assembly is fully covered or partially covered by excitation material in the at least two excitation regions that produce different bands of excited light.
14. The light source system of claim 1, wherein the dichroic element is at a predetermined angle to an optical axis of the light conversion assembly.
15. A projection device comprising the light source system of any one of claims 1-14.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321057304.2U CN219831614U (en) | 2023-05-05 | 2023-05-05 | Light source system and projection equipment |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202321057304.2U CN219831614U (en) | 2023-05-05 | 2023-05-05 | Light source system and projection equipment |
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| CN219831614U true CN219831614U (en) | 2023-10-13 |
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| CN202321057304.2U Active CN219831614U (en) | 2023-05-05 | 2023-05-05 | Light source system and projection equipment |
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| CN (1) | CN219831614U (en) |
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