CN113552759A - Optical engine - Google Patents

Abstract

The application discloses optical engine belongs to projection technical field. The optical engine includes: a light source, an optical-mechanical system and a lens; the light source comprises a light source shell, a light-emitting device and a fluorescent wheel, wherein the fluorescent wheel comprises a fluorescent sheet, a heat dissipation plate, a substrate and a driving part; the light emitting device and the driving part are fixed in the light source shell, the substrate is fixedly connected with a rotating shaft of the driving part, the heat dissipation plate and the fluorescent sheet are sequentially fixed on the substrate, and a light outlet of the light emitting device faces the fluorescent sheet; the light inlet side of the optical-mechanical system faces the light outlet side of the light source shell; the lens is fixed at the light outlet side of the optical-mechanical system. In the embodiment of the application, the heat gathered on the fluorescent sheet can be transferred to the heating panel to dissipate heat, and meanwhile, part of the heat transferred to the heating panel can be further transferred to the substrate to dissipate heat, so that the heat dissipation efficiency of the heat on the fluorescent sheet is improved, the problem of poor transmission imaging effect of the lens is avoided, and the transmission imaging effect of the optical engine is ensured.

Description

Optical engine

Technical Field

The present application relates to the field of projection technology, and more particularly, to an optical engine.

Background

With the continuous development of science and technology, optical engines are increasingly applied to the work and life of people, and are mainly used for emitting light beams to transmit and form images on a projection screen.

In the related art, the optical engine mainly comprises a light source, an optical mechanical system and a lens, wherein the light source comprises a light source shell, a light emitting device and a fluorescent wheel, the light emitting device and the fluorescent wheel are both fixed in the light source shell, the fluorescent wheel is positioned at the light outlet side of the light emitting device, and the fluorescent wheel is used for converting blue light emitted by the light emitting device into red light and green light and reflecting the red light and the green light to the optical mechanical system; the light inlet side of the optical-mechanical system faces the light outlet side of the light source shell and is used for modulating blue light emitted by the light-emitting device and red light and green light converted by the fluorescent wheel and emitting the modulated three-color light beams to the lens; the lens is located on the light outlet side of the optical-mechanical system and used for transmitting and imaging the three-color light beams emitted by the optical-mechanical system. As shown in fig. 1, the fluorescent wheel includes a fluorescent layer 1 for converting irradiated blue light into red light and green light, a mirror substrate 2 for reflecting the converted red light and green light, and a driving member 3 for driving the mirror substrate to rotate. The fluorescent layer 1 is fixed on the reflecting surface of the mirror substrate 2, the mirror substrate 2 is fixed on the driving part 3, and the driving part 3 can drive the mirror substrate 2 to rotate.

In order to ensure high brightness of transmission imaging, high-energy laser devices are adopted as light emitting devices. Therefore, the fluorescent layer is easy to collect a large amount of heat in unit time due to receiving high-energy blue light, so that the temperature of the fluorescent layer 1 is too high, the conversion efficiency of the fluorescent layer 1 to the blue light is further influenced, the red light and the green light can not meet the requirements easily, and the transmission imaging effect of the lens is reduced.

Disclosure of Invention

The application provides an optical engine, can avoid in the emergent light beam of light source that optical engine includes red light and green glow not enough, and the relatively poor problem of effect of transmission formation of image on projection screen that causes. The technical scheme is as follows:

an optical engine, comprising:

the light source comprises a light source shell, a light-emitting device and a fluorescent wheel, wherein the fluorescent wheel comprises a fluorescent sheet, a heat dissipation plate, a substrate and a driving part;

the light emitting device and the driving part are fixed in the light source shell, the substrate is fixedly connected with a rotating shaft of the driving part, the heat dissipation plate and the fluorescent sheet are sequentially fixed on the substrate, a light outlet of the light emitting device faces the fluorescent sheet, and the fluorescent sheet is used for converting blue light emitted by the light emitting device into red light and green light;

the light source shell is provided with a light source, a light inlet side and a light outlet side, wherein the light inlet side of the light source is opposite to the light outlet side of the light source shell, and the light source is used for converting the light emitted by the light source shell into red light and green light;

and the lens is fixed on the light outlet side of the optical-mechanical system and is used for receiving the light beam modulated by the optical-mechanical system and transmitting for imaging.

Optionally, the heat dissipation plate has a circular ring structure, and the heat dissipation plate has heat dissipation holes penetrating through the outer circular surface and the inner circular surface.

Optionally, the heat dissipation plate and the fluorescent sheet, and the heat dissipation plate and the substrate are welded by a welding layer.

Optionally, the fluorescent wheel further includes a fixed balance block, the substrate is sleeved on the rotating shaft, the fixed balance block is fixedly connected with the rotating shaft, and the substrate is clamped between the fixed balance block and the driving component.

Optionally, the fixed weight has a plurality of serrations arranged in a circumferential direction.

Optionally, the plurality of serrations are all straight teeth.

Optionally, the plurality of saw teeth are all helical teeth, and the plurality of helical teeth face in the opposite direction to the rotation direction of the fluorescent sheet.

Optionally, the fluorescent wheel further comprises a light-transmitting sheet, the fluorescent sheet is provided with a first notch, a second notch is arranged at a position, corresponding to the first notch, on the substrate, the light-transmitting sheet is fixed on the substrate, and an overlapping portion exists between the light-transmitting sheet and an area where the second notch is located.

Optionally, the fluorescent sheet comprises a fluorescent layer, a reflecting layer, a solder mask layer and a welding layer;

the fluorescent layer, the reflecting layer, the solder mask layer and the welding layer are arranged in a laminated mode, and the reflecting layer, the solder mask layer and the welding layer are sequentially formed on the first side face of the fluorescent layer in an electroplating mode;

the second side face, opposite to the first side face, of the fluorescent layer faces the light-emitting device, and the welding layer is welded with the heat dissipation plate.

Optionally, the fluorescent sheet further comprises an anti-reflection layer, and the anti-reflection layer is formed on the second side face of the fluorescent layer in an electroplating mode.

The technical scheme provided by the application has the beneficial effects that at least:

because the fluorescent sheet, the heating panel and the substrate are fixedly connected, the light beam emitted by the light-emitting device irradiates the fluorescent sheet, the heat gathered on the fluorescent sheet can be transmitted to the heating panel for heat dissipation, and part of the heat transmitted to the heating panel can be further transmitted to the substrate for heat dissipation, so that the heat dissipation efficiency of the heat on the fluorescent sheet is improved, the conversion performance of the fluorescent sheet to blue light is ensured, the problem of poor transmission imaging effect of the lens caused by insufficient conversion of red light and green light is avoided, and the transmission imaging effect of the optical engine is ensured.

Drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the description of the embodiments are briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic diagram of a fluorescent wheel provided in the related art;

FIG. 2 is a schematic diagram of a light beam path of a light source according to an embodiment of the present disclosure;

FIG. 3 is a schematic structural diagram of an optical engine according to an embodiment of the present disclosure;

fig. 4 is a schematic structural diagram of a light source provided in an embodiment of the present application;

FIG. 5 is a schematic structural diagram of a fluorescent wheel provided in an embodiment of the present application;

FIG. 6 is a schematic diagram of an exploded view of a fluorescent wheel according to an embodiment of the present disclosure;

FIG. 7 is a schematic view of an assembly structure of a fluorescent wheel provided in the embodiments of the present application;

FIG. 8 is a schematic top view of a fluorescent wheel according to an embodiment of the present disclosure;

FIG. 9 is a schematic structural diagram of a fixed weight according to an embodiment of the present disclosure;

FIG. 10 is a schematic structural view of another fixed weight according to an embodiment of the present disclosure;

FIG. 11 is a schematic top view of another example of a fluorescent wheel according to the present disclosure;

FIG. 12 is a schematic diagram of an exploded view of another example of a fluorescent wheel according to the present disclosure;

fig. 13 is a schematic structural diagram of a fluorescent sheet according to an embodiment of the present application.

Reference numerals:

the related technology comprises the following steps:

1: a fluorescent layer; 2: a mirror substrate; 3: a drive member;

the application:

01: a light source; 02: an opto-mechanical system; 03: a lens;

011: a light source housing; 012: a light emitting device; 013: a fluorescent wheel; 014: a light focusing assembly; 015: a dichroic mirror; 016: a mirror assembly; 017: a color filter; 018: a light homogenizer;

0131: a fluorescent sheet; 0132: a heat dissipation plate; 0133: a substrate; 0134: a drive member; 0135: fixing a balance block; 0136: a light transmitting sheet; 0137: a fixed frame;

01311: a fluorescent layer; 01312: a reflective layer; 01313: a solder resist layer; 01314: welding the layers; 01315: an anti-reflection layer;

01321: heat dissipation holes; 01351: and (4) saw teeth.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, a light source using a fluorescent wheel will be described next.

As shown in fig. 2, the light source 01 includes a light emitting device 012, a fluorescent wheel 013, a light condensing member 014, a dichroic mirror 015, a mirror assembly 016, a color filter 017, and a light homogenizer 018; wherein, light emitting device 012, spotlight subassembly 014, dichroic mirror 015 and fluorescence wheel 013 arrange along same straight line in proper order, the light-emitting mouth of light emitting device 012 is towards the income light side of spotlight subassembly 014, the light-emitting side of spotlight subassembly 014 is towards the plane of transmission of dichroic mirror 015, and the plane that dichroic mirror 015 belonged to forms the contained angle with the central line of incident light beam, the income light side of fluorescence wheel 013 is towards the plane of reflection of dichroic mirror 015, the income light side of filter is towards the plane of reflection of dichroic mirror 015, and be located with this same straight line vertical direction, the income light side of dodging ware 018 is towards the filter, and the play light side of dodging ware 018 is used for facing optical machine system 02. Wherein the fluorescent wheel 013 has a transmissive region and a reflective region.

In an actual implementation process, the light emitting device 012 may be a laser array, and the light emitting device 012 is configured to emit blue light, the emitted blue light is condensed by the light condensing assembly 014 and then transmitted to the fluorescent wheel 013 through a transmission surface of the dichroic mirror 015, when the blue light is transmitted to a reflection region on the fluorescent wheel 013, the fluorescent wheel 013 may convert the blue light into red light and green light, and then reflected to a reflection surface of the dichroic mirror 015 through the reflection region, and further reflected to the optical filter; when the blue light is transmitted to the transmission region on the fluorescent wheel 013, the transmitted blue light can be reflected to the transmission surface of the dichroic mirror 015 under the multiple reflection action of the reflector component 016 and further transmitted to the optical filter; then, for the reflected red light and green light blue, and the transmitted blue light, the red light, the green light, and the blue light can be emitted in time sequence under the filtering and transmitting action of the optical filter, and then emitted to the opto-mechanical system 02 in time sequence after the output red light, green light, and blue light are homogenized by the homogenizer 018.

Here, the dichroic mirror 015 may be a mirror that transmits blue light and reflects red and green light. The light homogenizer 018 may be a light pipe or other device. The light source 01 may further include a first lens assembly and a second lens assembly, and the first lens assembly and the second lens assembly are respectively disposed on the light incident side and the light emitting side of the fluorescence wheel 013, and both the first lens assembly and the second lens assembly have focusing and collimating functions. In this way, blue light transmitted by dichroic mirror 015 may be focused by the first lens assembly before being transmitted to phosphor wheel 013 to reduce the area of the spot illuminated on phosphor wheel 013. The red and green light converted by the fluorescent wheel 013 can be collimated by the first lens assembly to achieve the collimation of the light beam. The blue light transmitted by the fluorescent wheel 013 can be collimated by the second lens assembly to realize parallel emission of the blue light.

Embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

Fig. 3 illustrates a schematic structural diagram of an optical engine according to an embodiment of the present application, fig. 4 illustrates a schematic structural diagram of a light source 01 according to an embodiment of the present application, and fig. 5 illustrates a schematic structural diagram of a fluorescent wheel 013 according to an embodiment of the present application. With reference to fig. 3, 4 and 5, the optical engine includes: a light source 01, an opto-mechanical system 02 and a lens 03, wherein the light source 01 comprises a light source housing 011, a light emitting device 012 and a fluorescent wheel 013, and the fluorescent wheel 013 comprises a fluorescent sheet 0131, a radiating plate 0132, a substrate 0133 and a driving part 0134. The light emitting device 012 and the driving part 0134 are fixed in the light source housing 011, the substrate 0133 is fixedly connected with a rotating shaft of the driving part 0134, the radiating plate 0132 and the fluorescent sheet 0131 are sequentially fixed on the substrate 0133, a light outlet of the light emitting device 012 faces the fluorescent sheet 0131, and the fluorescent sheet 0131 is used for converting blue light emitted by the light emitting device 012 into red light and green light; the light inlet side of the optical-mechanical system 02 faces the light outlet side of the light source housing 011, and the optical-mechanical system 02 is used for modulating the red light and the green light converted by the fluorescent wheel 013 and emitting modulated light beams; the lens 03 is fixed on the light exit side of the optical-mechanical system 02, and is used for receiving the light beam modulated by the optical-mechanical system 02 and transmitting the light beam for imaging.

In the embodiment of the present application, because the fluorescent sheet 0131, the radiating plate 0132 and the substrate 0133 are fixedly connected, the light beam emitted by the light emitting device 012 irradiates on the fluorescent sheet 0131, the heat gathered on the fluorescent sheet 0131 can be transferred to the radiating plate 0132 for heat dissipation, and part of the heat transferred to the radiating plate 0132 can also be continuously transferred to the substrate 0133 for heat dissipation, thereby improving the heat dissipation efficiency on the fluorescent sheet 0131, ensuring the conversion performance of the fluorescent sheet 0131 on blue light, avoiding the transmission imaging effect of the lens 03 caused by insufficient conversion of red light and green light, and ensuring the transmission imaging effect of the optical engine.

Note that, with the fluorescent wheel 013 of the above example, the fluorescent sheet 0131 can convert all of the blue light emitted from the light emitting device 012 into red light and green light. In order to realize the emission of the three-color light beams, the light source 01 may further include an additional light emitting device 012, and the additional light emitting device 012 may directly emit blue light to the optical system 02 to realize the sequential emission of the three-color light beams of red light, green light and blue light by the light source 01.

The light emitting device 012 may be a laser array, and the light emitting device 012 is configured to emit blue light, that is, the light emitting device 012 may be a blue laser array. The substrate 0133 may be made of metal, so that the substrate 0133 not only can radiate heat by itself, but also can radiate heat by convection of air during rotation.

The fluorescent sheet 0131, the heat dissipation plate 0132 and the substrate 0133 may all be in a ring structure, and of course, other structures may also be used as long as the fluorescent sheet 0131 can convert blue light emitted by the light emitting device 012 to obtain red light and green light, and transfer of heat on the heat dissipation plate 0132 and the fluorescent sheet 0131 is realized, which is not limited in this embodiment of the application. As shown in fig. 6 or 7, phosphor sheet 0131, heat radiating plate 0132 and substrate 0133 are all in the form of circular rings. Of course, the three structures of the phosphor sheet 0131, the heat radiating plate 0132 and the substrate 0133 may be different, as long as the rapid heat radiation of the phosphor sheet 0131 can be realized.

Note that, the size of phosphor plate 0131 may be smaller than the size of heat dissipation plate 0132, and the size of heat dissipation plate 0132 may be smaller than the size of substrate 0133, so as to increase the heat transfer area between phosphor plate 0131 and heat dissipation plate 0132, and between heat dissipation plate 0132 and substrate 0133; meanwhile, since a partial area of the radiator plate 0132 may be exposed, the radiating area of the radiator plate 0132 is increased. Of course, the size of the fluorescent sheet 0131 may be slightly larger than that of the heat dissipation plate 0132, and the size of the heat dissipation plate 0132 may also be slightly larger than that of the substrate 0133, as long as the rapid heat dissipation on the fluorescent sheet 0131 can be achieved, which is not limited in this application.

The fluorescent sheet 0131 and the heat dissipation layer, and the heat dissipation layer and the substrate 0133 can be fixed in an adhesive manner, or in a mechanical fixing manner, and certainly, the fluorescent sheet 0131 and the heat dissipation layer, and the heat dissipation layer and the substrate 0133 can also be fixed in a welding manner by the welding layer 01314, so that the heat transfer efficiency between the fluorescent sheet 0131 and the heat dissipation plate 0132, and between the heat dissipation plate 0132 and the substrate 0133 is ensured due to the metal welding manner.

For example, as shown in fig. 7, the substrate 0133, the heat dissipation plate 0132 and the fluorescent sheet 0131 may be sequentially sleeved on the positioning column of the carrying fixture, and then the pressing fixture is pressed on the fluorescent sheet 0131, so that the pressing between the substrate 0133, the heat dissipation plate 0132 and the fluorescent sheet 0131 is realized through the cooperation of the carrying fixture and the pressing fixture. After that, the substrate 0133, the heat dissipation plate 0132 and the fluorescent sheet 0131 after being pressed are placed in a welding furnace to be heated, and then the welding between the fluorescent sheet 0131 and the heat dissipation layer and between the heat dissipation layer and the substrate 0133 can be realized when the heating temperature reaches a certain temperature.

Note that, the phosphor plate 0131 has a solder layer on the side facing the radiator plate 0132, the radiator plate 0132 has a solder layer on the side facing the phosphor plate 0131 and a solder layer on the side facing the substrate 0133, and the substrate 0133 has a solder layer on the side facing the radiator plate 0132. The embodiment of the present application does not limit this. Wherein the solder layer may be formed by means of electroplating.

In some embodiments, heat spreader 0132 may have a circular ring-shaped configuration, as shown in fig. 7, and heat spreader 0132 has heat dissipation holes 01321 extending through the outer and inner circular surfaces. In this way, the heat radiation area of the heat radiation plate 0132 can be increased by the heat radiation holes 01321 on the heat radiation plate 0132, and the heat radiation effect of the fluorescent sheet 0131 can be increased.

The heat dissipation holes 01321 may be disposed along the radial direction, and certainly, the length direction of the heat dissipation hole 01321 may also form a certain included angle with the radial direction, as long as the heat dissipation holes 01321 do not penetrate through to the upper surface and the lower surface of the heat dissipation layer, so that the heat transfer area between the heat dissipation plate 0132 and the fluorescent sheet 0131 and the heat transfer area between the heat dissipation plate 0132 and the substrate 0133 may be ensured, which is not limited in the embodiments of the present application.

It should be noted that, a plurality of heat dissipation holes 01321 may be disposed on heat dissipation plate 0132, and a plurality of heat dissipation holes 01321 may be uniformly distributed along the circumferential direction of heat dissipation plate 0132, so as to achieve uniform heat dissipation of phosphor plate 0131 as a whole, and avoid the phenomenon of higher temperature due to heat accumulation on part of phosphor plate 0131.

In the embodiment of the present application, the substrate 0133 may be directly fixed on the rotating shaft of the driving part 0134, for example, by welding. Of course, the base plate 0133 may be fixed to the rotation shaft of the driving member 0134 by a fixing member.

In some embodiments, as shown in fig. 5 or fig. 6, the fluorescent wheel 013 may further include a fixing weight 0135, the substrate 0133 is sleeved on the rotating shaft, the fixing weight 0135 is fixedly connected with the rotating shaft, and the substrate 0133 is clamped between the fixing weight 0135 and the driving member 0134. The fixing balance weight 0135 may be screwed to the rotating shaft, so that the substrate 0133 is clamped between the fixing balance weight 0135 and the body of the rotating component when the fixing balance weight 0135 is screwed.

Wherein, the fixing balance weight 0135 can be a screwing nut. Of course, in order to facilitate heat dissipation of the fluorescent sheet 0131, the fixing weight 0135 has a plurality of serrations 01351 arranged in the circumferential direction as shown in fig. 8. Thus, when the driving member 0134 drives the fixed balance weight 0135 to rotate, the plurality of saw teeth 01351 on the fixed balance weight 0135 can stir the ambient air at the same time, so that the flow of the ambient air is accelerated, and the heat dissipation efficiency is improved.

The tip of each serration 01351 may be a pointed design, but may also be a rounded design. The edge of each sawtooth 01351 may be a straight line or an arc, as long as it can agitate the surrounding air, and this is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 9, the plurality of serrations 01351 may each be straight teeth; of course, as shown in fig. 10, the plurality of teeth 01351 may also be helical teeth.

When the plurality of saw teeth 01351 are all helical teeth, the plurality of helical teeth may be oriented in the opposite direction of rotation of the phosphor patch 0131. For example, in the process of implementing the light beam conversion, if the rotation direction of the fluorescent sheet 0131 is clockwise, the orientation of the plurality of helical teeth is counterclockwise; if the rotation direction of the phosphor patch 0131 is counterclockwise, the plurality of helical teeth are oriented clockwise. Since the plurality of saw teeth 01351 may be all helical teeth, and the plurality of helical teeth are oriented in the opposite direction to the rotation direction of the fluorescent sheet 0131, it is possible to stir the surrounding air more efficiently when the driving member 0134 rotates the fixed balance 0135.

It should be noted that, as for the heat dissipation holes 01321 provided on the heat dissipation plate 0132, the spiral direction of the spiral structure formed in the length direction of the plurality of heat dissipation holes 01321 may be opposite to the rotation direction of the fluorescent sheet 0131, so as to improve the heat dissipation efficiency of the heat on the heat dissipation plate 0132 along the heat dissipation holes 01321.

In the embodiment of the present application, when the driving part 0134 rotates the substrate 0133, heat is inevitably generated, so that the driving part 0134 can be disposed on the light source housing 011 at a position close to the heat sink. The heat sink is a device fixed on the outer wall of the light source housing 011 and used for dissipating heat of the light source housing 011. The radiator can be an air cooling radiator or a liquid cooling radiator.

When the radiator is a liquid cooling radiator, a part of a liquid cooling pipe of the liquid cooling radiator may be disposed around the body of the driving part 0134 to improve a heat dissipation effect on the driving part 0134.

The embodiment of the present application further provides another structure of the fluorescent wheel 013, which is different from that shown in fig. 11 or 12, in that the fluorescent wheel 013 further includes a light-transmitting sheet 0136, the fluorescent sheet 0131 is provided with a first notch, a second notch is provided on the substrate 0133 at a position corresponding to the first notch, the light-transmitting sheet 0136 is fixed on the substrate 0133, and an overlapping portion exists between the light-transmitting sheet 0136 and a region where the second notch is located.

In this way, since the positions of the first notch and the second notch correspond to each other and there is an overlapping portion between the area where the second notch is located and the light-transmitting sheet 0136, it can be considered that there is an overlapping portion between the area where the first notch is located, the area where the second notch is located, and the area where the light-transmitting sheet 0136 is located. In this way, the blue light emitted from the light emitting device 012 can directly irradiate the transparent sheet 0136, and further directly pass through the substrate 0133 to be emitted to the opto-mechanical system 02 due to the overlapping portion between the transparent sheet 0136 and the area where the second notch is located.

In order to facilitate the blue light passing through the substrate 0133 to exit to the optical-mechanical system 02, a set of reflective mirror components 016 may be further disposed in the light source housing 011, and the direction of the blue light passing through the substrate 0133 is adjusted to exit to the optical-mechanical system 02 through the multiple reflection of the set of reflective mirror components 016.

As shown in fig. 2, the set of mirror components 016 may include three mirrors, and an included angle between a reflection surface of each mirror and a central line of the light beam is 45 degrees. Of course, the set of mirror components 016 may also include other number of mirrors, and an included angle between a reflection surface of each mirror and a central line of the light beam may also be different, as long as the direction of the blue light passing through the substrate 0133 can be adjusted to be emitted to the opto-mechanical system 02 by the other number of mirrors, which is not limited in the embodiment of the present application.

In some embodiments, as shown in fig. 12, the fluorescent wheel 013 may further include a fixing frame 0137, the fixing frame 0137 is fixed on the substrate 0133 in the area where the second notch is located, and the light-transmissive sheet 0136 is fixedly connected with the fixing frame, so as to realize the fixed connection between the light-transmissive sheet 0136 and the substrate 0133, and simultaneously ensure that there is an overlapping portion between the area where the light-transmissive sheet 0136 is located and the area where the second notch is located.

The fixing frame 0137 can be fixedly connected with the substrate 0133 by welding, and of course, the fixing frame 0137 can also be fixedly connected with the substrate 0133 by bonding or other methods. The light-transmitting sheet 0136 and the fixing frame 0137 can be fixedly connected through bonding, and the light-transmitting sheet 0136 and the fixing frame 0137 can be fixedly connected through other methods.

In the embodiment of the present application, in addition to the fixing of the light-transmitting sheet 0136 and the substrate 0133 by the fixing frame 0137, the light-transmitting sheet 0136 may also be directly fixed on the substrate 0133 in the area of the second notch by bonding or other methods, which is not limited in the embodiment of the present application.

The embodiment of the application also provides a fluorescent sheet 0131. As shown in fig. 13, the fluorescent sheet 0131 may include a fluorescent layer 01311, a reflective layer 01312, a solder resist layer 01313, and a solder layer 01314; the fluorescent layer 01311, the reflecting layer 01312, the solder mask layer 01313 and the soldering layer 01314 are stacked, and the reflecting layer 01312, the solder mask layer 01313 and the soldering layer 01314 are sequentially formed on the first side face of the fluorescent layer 01311 in an electroplating mode; a second side surface opposite to the first side surface of the fluorescent layer 01311 faces the light emitting device 012, and the solder layer 01314 is soldered to the heat dissipation plate 0132.

The fluorescent layer 01311 may be a ceramic fluorescent material, a silica gel fluorescent material, or a glass fluorescent material. When the fluorescent layer 01311 is a ceramic fluorescent material, it may be formed by sintering YAG (Y3Al5O10: Ce3+, cerium-doped yttrium aluminum garnet) and a ceramic material at a high temperature, or may be a ceramic fluorescent material or a single crystal fluorescent material formed by a manufacturing process such as crystal growth. The thickness of the fluorescent layer 01311 can be in the range of 0.05mm to 1mm to ensure the overall thickness of the fluorescent layer 01311. Illustratively, the thickness of the fluorescent layer 01311 may be 0.5 mm.

The reflecting layer 01312 can be a dielectric film or a metal film, the thickness of the plated film can be in the range of 0.5-10 μm, and the reflecting layer 01312 has high reflectivity to visible light with the waveband spectral range of 420-680 nm, so that the efficiency of the visible light with the waveband spectral range of 420-680 nm is ensured. The visible light with the wave band spectral range of 420nm-680nm can be red light and green light, and further the brightness of the red light and the green light emitted by the light source 01 can be further improved. The dielectric film is mainly made of silicon dioxide, tantalum pentoxide and the like. The material of the metal film may be aluminum or the like.

The solder mask 01313 can be a nickel or titanium layer, and the solder mask 01313 is mainly used to prevent the solder mask 01314 from damaging the reflective layer 01312 in a high temperature environment, so as to prevent the reflective layer 01312 from generating a chemical reaction. The thickness of the solder mask 01313 may be in the range of 0.1 μm to 5 μm. Illustratively, the solder mask 01313 may have a thickness of 2 μm.

Solder layer 01314 may be a metal solder layer 01314 to ensure heat transfer efficiency between phosphor layer 01311 and heat spreader plate 0132 after soldering. Illustratively, the solder layer 01314 may be a gold layer. The thickness of the solder layer 01314 is in the range of 0.1 μm to 2 μm. Illustratively, the solder layer 01314 has a thickness of 1 μm.

In some embodiments, as shown in fig. 13, the phosphor plate 0131 can further comprise an anti-reflection layer 01315, and the anti-reflection layer 01315 is formed on the second side of the phosphor plate 0131 by electroplating. By arranging the anti-reflection layer 01315, the light transmittance of blue light can be increased to improve the utilization efficiency of light beams, thereby improving the display brightness.

Wherein the thickness of anti-reflection layer 01315 is in the range of 0.5 μm-10 μm. Since anti-reflection layer 01315 is used to enhance the transmission effect of blue light, the thickness of anti-reflection layer 01315 may be designed based on the wavelength of blue light in anti-reflection layer 01315. Illustratively, antireflective layer 01315 may have a thickness of one quarter of the wavelength of blue light in the antireflective film.

In the embodiment of the application, because fluorescence heating panel and base plate fixed connection, on the light beam of luminescent device outgoing shines the fluorescence piece like this, the heat of gathering on the fluorescence piece can be transmitted to the heating panel and dispels the heat, and partial heat that transmits to on the heating panel simultaneously can also dispel the heat transmitting to the base plate to thermal radiating efficiency on the fluorescence piece has been improved, the conversion performance of fluorescence piece has been guaranteed, has also guaranteed the luminance of the red light and the green glow after the commentaries on classics. Therefore, red light, green light and blue light emitted by a light source time sequence are received by the optical-mechanical system and are emitted to the lens after being modulated, so that the lens can improve the transmission imaging effect of the lens based on the blue light and the red light and the green light with better brightness, and the transmission imaging effect of the optical engine is ensured.

The above description is only exemplary of the present application and should not be taken as limiting the present application, as any modification, equivalent replacement, or improvement made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims (10)

1. An optical engine, comprising:

the light source comprises a light source shell, a light-emitting device and a fluorescent wheel, wherein the fluorescent wheel comprises a fluorescent sheet, a heat dissipation plate, a substrate and a driving part;

the light emitting device and the driving part are fixed in the light source shell, the substrate is fixedly connected with a rotating shaft of the driving part, the heat dissipation plate and the fluorescent sheet are sequentially fixed on the substrate, a light outlet of the light emitting device faces the fluorescent sheet, and the fluorescent sheet is used for converting blue light emitted by the light emitting device into red light and green light;

the light source shell is provided with a light source, a light inlet side and a light outlet side, wherein the light inlet side of the light source is opposite to the light outlet side of the light source shell, and the light source is used for converting the light emitted by the light source shell into red light and green light;

and the lens is fixed on the light outlet side of the optical-mechanical system and is used for receiving the light beam modulated by the optical-mechanical system and transmitting for imaging.

2. The optical engine as claimed in claim 1, wherein the heat dissipation plate has a circular ring structure, and the heat dissipation plate has heat dissipation holes penetrating through an outer circumferential surface and an inner circumferential surface.

3. An optical engine as claimed in claim 1 or 2, wherein the heat-dissipating plate and the phosphor sheet, and the heat-dissipating plate and the substrate are soldered by a solder layer.

4. The optical engine according to claim 1 or 2, wherein the fluorescent wheel further comprises a fixed weight, the substrate is fitted over the rotating shaft, the fixed weight is fixedly connected to the rotating shaft, and the substrate is clamped between the fixed weight and the driving member.

5. The optical engine of claim 4, wherein the fixed weight has a plurality of serrations arranged in a circumferential direction.

6. The optical engine of claim 5 wherein the plurality of serrations are all straight teeth.

7. The optical engine of claim 5, wherein the plurality of teeth are helical teeth, and wherein the plurality of helical teeth are oriented in a direction opposite to a direction of rotation of the phosphor sheet.

8. The optical engine of claim 1, wherein the fluorescent wheel further comprises a transparent sheet, the fluorescent sheet is formed with a first notch, a second notch is formed on the substrate at a position corresponding to the first notch, the transparent sheet is fixed on the substrate, and an overlapping portion exists between a region where the transparent sheet and the second notch are located.

9. The optical engine of claim 1, wherein the phosphor sheet comprises a phosphor layer, a reflective layer, a solder resist layer, and a solder layer;

the fluorescent layer, the reflecting layer, the solder mask layer and the welding layer are arranged in a laminated mode, and the reflecting layer, the solder mask layer and the welding layer are sequentially formed on the first side face of the fluorescent layer in an electroplating mode;

the second side face, opposite to the first side face, of the fluorescent layer faces the light-emitting device, and the welding layer is welded with the heat dissipation plate.

10. The optical engine of claim 9, wherein the phosphor sheet further comprises an anti-reflective layer formed by electroplating on the second side of the phosphor layer.

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