Projection optical machine and projector

Abstract

Provided in the present disclosure are a projection optical machine and a projector. A supplementary light-combining module is configured to combine laser emitted by a laser light source module with third LED light emitted by a third LED light source module, so as to obtain first combined light; a basic light-combining module is configured to combine first LED light emitted by a first LED light source module and second LED light emitted by a second LED light source module with the first combined light, so as to obtain a target combined-light source; the supplementary light-combining module comprises a supplementary light-splitting sheet, and the supplementary light-splitting sheet comprises a light reflecting region and a light transmitting region; the light reflecting region is used for reflecting the third LED light emitted by the third LED light source module, and the light transmitting region is used for transmitting the laser emitted by the laser light source module; and alternatively, the light reflecting region is used for reflecting the laser, and the light transmitting region is used for transmitting the third LED light. The projection optical machine in the present disclosure can increase the brightness without significantly increasing the size of the projection optical machine; in addition, when a laser light source is newly added, it can be ensured that speckles do not appear on a picture, thereby improving the viewing experience of the projection optical machine.

Description

Projection light machine and projector

[0001] Citation of Related Applications

[0002] This disclosure claims all rights and interests in the utility model patent application entitled “Projection Optical Machine and Projector” with application number 202420629913.9 filed with the State Intellectual Property Office of the People’s Republic of China on March 28, 2024, and incorporates the entire contents thereof into this document by reference.

[0003] field

[0004] The present disclosure relates to the technical field of projection optical machines, and in particular to a projection optical machine and a projector.

[0005] background

[0006] As projector technology matures and its market share grows rapidly, users of consumer projectors are increasingly demanding products, hoping to achieve higher brightness and clearer image quality in a smaller product size.

[0007] The main solutions for miniaturized projectors currently utilize LED or laser light sources. Monochromatic lasers require a rotating wavelength conversion device to excite white light, resulting in low color gamut and contrast. Trichromatic lasers require a rotating or vibrating speckle elimination device, which still cannot completely resolve the speckle problem. Furthermore, these unstable components significantly reduce product yield and reliability. Low contrast and speckle can also affect the user's viewing experience and even cause irreversible damage to the human eye. Compared to laser light sources, pure LED light sources still offer lower brightness and a poorer viewing experience for products of the same size, failing to meet consumer expectations.

[0008] Overview

[0009] In view of this, in order to solve the technical problem of poor viewing experience in the above-mentioned projector optical machine, the present disclosure provides a projection optical machine and a projector.

[0010] According to a first aspect of an embodiment of the present disclosure, a projection optical engine is provided, the projection optical engine including a light source system and a light combining system, the light source system including a basic light source module and a supplementary light source module, the light combining system including a basic light combining module and a supplementary light combining module, the basic light source module including a first LED light source module, a second LED light source module, and a third LED light source module, the supplementary light source module including a laser light source module;

[0011] The supplementary light combining module is used to combine the laser light emitted by the laser light source module and the third LED light emitted by the third LED light source module to obtain a first combined light;

[0012] The basic light combining module is used to combine the first LED light emitted by the first LED light source module, the second LED light emitted by the second LED light source module, and the first combined light to obtain a target combined light source;

[0013] Wherein, the supplementary light combining module includes a supplementary light splitter, and the supplementary light splitter includes a reflective area and a light-transmitting area;

[0014] The reflective area is used to reflect the third LED light emitted by the third LED light source module, and the transparent area is used to transmit the laser emitted by the laser light source module; or, the reflective area is used to reflect the laser, and the transparent area is used to transmit the third LED light.

[0015] In certain embodiments, the reflective region is located at the periphery of the light-transmitting region, the reflective region is used to reflect the third LED light, and the light-transmitting region is used to transmit the laser.

[0016] In some embodiments, the reflective area includes a first coating for reflecting the light of the third LED, and the transparent area includes a transparent through hole or a transparent material with uniform thickness.

[0017] In certain embodiments, the light-transmitting region is located at the periphery of the light-reflecting region, the light-reflecting region is used to reflect the laser, and the light-transmitting region is used to transmit the third LED light.

[0018] In certain embodiments the domain includes a non-coated area.

[0019] In certain embodiments, the laser light comprises a red laser light and the third LED light comprises a red LED light.

[0020] In some embodiments, the laser light source module includes a laser light source, a laser collimating lens and a diffuser, wherein the laser collimating lens is located between the laser light source and the diffuser, and the diffuser is located between the laser collimating lens and the supplementary light combining module.

[0021] In some embodiments, the supplementary light source module includes a supplementary LED light source module, and the basic light combining module includes a first beam splitter. The supplementary LED light emitted by the supplementary LED light source module passes through the first beam splitter and is transmitted to the first LED light source module to secondary stimulate the first LED light source module to emit light.

[0022] In some embodiments, the first beam splitter includes a second basic beam splitter, the supplementary LED light source module is arranged opposite to the first LED light source module, and is respectively located on both sides of the second basic beam splitter; the second basic beam splitter is used to transmit the second LED light and the supplementary LED light emitted by the supplementary LED light source module, and the second basic beam splitter is used to reflect the first LED light; the supplementary LED light is transmitted to the first LED light source module after passing through the second basic beam splitter.

[0023] According to a second aspect of an embodiment of the present disclosure, a projector is provided, comprising the projection optical engine as described in any one of the first aspects.

[0024] The technical solution provided by the embodiments of the present disclosure may include the following beneficial effects: the projection optical machine of the present disclosure not only includes a basic light source module composed of an LED light source and a corresponding basic light combining module, but also adds a supplementary light source module and a supplementary light combining module. The newly added supplementary light source module and the supplementary light combining module can supplement the laser for the projection optical machine. The added laser light source is matched with the supplementary light combining module, and the light combining of the laser and the LED light is achieved by utilizing the difference in optical extension. For example, the light combining of the laser and the third LED light is achieved by reflecting the third LED light through the transmitted laser, or by reflecting the laser through the third LED light. Since the power density and photoelectric conversion efficiency of the laser are better than those of the LED light, the laser light source can increase the brightness without increasing the size of the projection optical machine too much, thereby ensuring the miniaturization of the projection optical machine. In addition, the laser is coherent light, and the LED light is incoherent light. By utilizing the principle that the mixing of incoherent light and coherent light is still incoherent light, it can be ensured that there is no speckle on the screen when a laser light source is added, thereby improving the viewing experience of the projection optical machine.

[0025] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the disclosure.

[0026] BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The accompanying drawings are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the present invention, and together with the description, serve to explain the principles of the present invention.

[0028] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0029] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplifications do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings are represented as similar elements. Unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0030] FIG1 is a schematic structural diagram of a projection optical engine according to an exemplary embodiment.

[0031] FIG2 is a block diagram of a projection optical engine according to an exemplary embodiment.

[0032] FIG3 is a partial schematic diagram of a projection light engine according to an exemplary embodiment.

[0033] FIG4 is a schematic diagram showing local light transmission of a projection optical engine according to an exemplary embodiment.

[0034] FIG. 5 is a partial schematic diagram of a projection light engine according to another exemplary embodiment.

[0035] FIG6 is a schematic diagram showing local light transmission of a projection optical engine according to another exemplary embodiment.

[0036] FIG. 7 is a schematic diagram showing local light transmission of a projection optical engine according to another exemplary embodiment.

[0037] FIG8 is a schematic diagram showing local light transmission of a projection optical engine according to another exemplary embodiment.

[0038] FIG9 is a schematic diagram showing light transmission of a projection light engine according to an exemplary embodiment (the light homogenization system is not shown in the figure).

[0039] FIG10 is a schematic diagram of light transmission of a projection light engine according to another exemplary embodiment (the light homogenization system is not shown in the figure).

[0040] Reference numerals 1, light source system; 11, basic light source module; 111, first LED light source module; 1111, first LED light source; 1112, first LED collimating lens; 112, second LED light source module; 113, third LED light source module; 12, supplementary light source module; 121, laser light source module; 1211, laser light source; 1212, laser collimating lens; 1213, diffuser; 122, supplementary LED light source module; 2, light combining system; 21, basic light combining module; 211, first beam splitter; 211a, first basic beam splitter; 211b, second basic beam splitter; 212, second beam splitter; 212a, third basic beam splitter; 212b, fourth basic beam splitter; 22, supplementary light combining module; 22a, first supplementary beam splitter; 22a1, first reflective area; 22a2, first light-transmitting area; 22b, second supplementary beam splitter; 22b1, second reflective area; 22b2, second light-transmitting area; 3, light uniformity system.

[0041] Details

[0042] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0043] The disclosure below provides many different embodiments or examples for realizing different structures of the present invention. In order to simplify the disclosure of the present invention, the components and settings of specific examples are described below. Of course, they are merely examples and are not intended to limit the present invention. In addition, the present invention may repeat reference numbers and / or letters in different examples. This repetition is for the purpose of simplicity and clarity and does not in itself indicate the relationship between the various embodiments and / or settings discussed. In addition, the present invention provides examples of various specific processes and materials, but a person of ordinary skill in the art will appreciate the applicability of other processes and / or the use of other materials.

[0044] For ease of description, spatially relative terms may be used herein to describe the relative position or movement of one element or feature relative to another element or feature as shown in the figures, such as "inside," "outside," "inside," "outside," "below," "beneath," "above," "above," "front," "back," and the like. Such spatially relative terms are intended to include different orientations of the device in use or operation other than the orientation depicted in the figures. For example, if the device in the figures undergoes a positional flip or a change in posture or a change in motion, then these directional indications will also change accordingly. For example, an element described as "below" or "below" another element or feature will subsequently be oriented as "above" or "above" another element or feature. Thus, the example term "below" can include both above and below orientations. The device may be oriented otherwise (rotated 90 degrees or in other orientations) and the spatially relative descriptors used herein will be interpreted accordingly.

[0045] The embodiment of the present disclosure provides a projection shutdown and projector. The projection optical machine disclosed in the present disclosure not only includes a basic light source module composed of an LED light source and a corresponding basic light combining module, but also adds a supplementary light source module and a supplementary light combining module. The newly added supplementary light source module and the supplementary light combining module can supplement the laser for the projection optical machine. The added laser light source is matched with the supplementary light combining module, and the light combining of the laser and the LED light is achieved by using the difference in optical extension. For example, the light combining of the laser and the third LED light is achieved by reflecting the third LED light through the transmitted laser, or by reflecting the laser through the third LED light. Since the power density and photoelectric conversion efficiency of the laser are better than those of the LED light, the laser light source can increase the brightness without increasing the size of the projection optical machine too much, thereby ensuring the miniaturization of the projection optical machine. In addition, the laser is coherent light, and the LED light is incoherent light. By using the principle that the mixing of incoherent light and coherent light is still incoherent light, it can be ensured that there is no speckle on the screen when a laser light source is added, thereby improving the viewing experience of the projection optical machine.

[0046] In an exemplary embodiment, a projection light machine and a device including the projection light machine are provided. Referring to Figures 1 and 2, the projection light machine may generally include a light source system 1, a light combining system 2, and a light uniforming system 3. The light source system 1 may generally include three LED light source modules, which may be respectively recorded as a first LED light source module 111, a second LED light source module 112, and a third LED light source module 113. The three LED light source modules may include LED light source modules of three different colors and wavelengths, namely red, green, and blue, in sequence. The above three LED light source modules may constitute a basic light source module 11. It should be noted that in addition to including the above three LED light source modules, the basic light source module 11 may also include other components, which is not limited to this. Each LED light source module may include an LED light source and an LED collimating lens to ensure that the LED light source can better reach the corresponding position in the light combining system 2 for light combining. For example, the first LED light source module 111 may include a first LED light source 1111 and a first LED collimating lens 1112.

[0047] The light combining system 2 generally includes two beam splitters, which can be respectively designated as a first beam splitter 211 and a second beam splitter 212. The first beam splitter 211 and the second beam splitter 212 can constitute a basic light combining module. It should be noted that in addition to the two beam splitters, the basic light combining module can also include other components, which are not limited to this.

[0048] The first beam splitter utilizes wavelength differences to combine two of the three LED colors (red, green, and blue). The second beam splitter 212 also utilizes wavelength differences to combine the two-color mixed light with the third LED light, which is then transmitted to the light homogenization system 3. Generally, the combined light transmitted to the light homogenization system 3 is white light. The light homogenization system 3 may include a fly-eye lens to improve the uniformity of the white light for illuminating the display device of the projector.

[0049] In the projection optical machine of this embodiment, the light source system 1 may include, in addition to the basic light source module 11, a supplementary light source module 12, thereby increasing the brightness of the light source provided by the light source system 1. Furthermore, the light combining system 2 may include, in addition to the basic light combining module, a supplementary light combining module 22 for combining the supplementary light from the supplementary light source module 12 with the basic light from the basic light source module 11, thereby increasing the brightness of the target combined light source transmitted to the light homogenization system 3.

[0050] Among them, the supplementary light source module 12 may include a laser light source module 121. In some embodiments, the laser light source module 121 may include a laser light source 1211, a laser collimating lens 1212 and a diffuser 1213. The laser collimating lens 1212 is located between the laser light source 1211 and the diffuser 1213. The diffuser 1213 is located between the laser collimating lens 1212 and the supplementary light combining module 22 to better ensure that the laser light emitted by the laser light source 1211 is transmitted to the supplementary light combining module 22. In addition, the diffuser 1213 provided between the laser light source 1211 and the supplementary light combining module 22 can solve the speckle problem without increasing the optical expansion in the projection optical machine. It should be noted that in addition to the above-mentioned structure, the laser light source module 121 may also have other structures, which are not limited to this.

[0051] The supplementary light combining module 22 can be used to combine the laser light emitted by the laser light source module 121 and the third LED light emitted by the third LED light source module 113 to obtain a first combined light. For example, the supplementary light combining module 22 can combine the laser light and the third LED light by utilizing the difference in light etendue to obtain the first combined light.

[0052] The supplementary light combining module 22 includes a supplementary beam splitter, which includes a reflective region and a translucent region. It should be noted that in this embodiment, the reflective region is used to reflect the third LED light emitted by the third LED light source module, and the translucent region is used to transmit the laser light emitted by the laser light source module, thereby combining the laser light and the third LED light. Alternatively, the reflective region is used to reflect the laser light, and the translucent region is used to transmit the third LED light, thereby also combining the laser light and the third LED light.

[0053] In the optical projection machine of this embodiment, the basic light combining module can be used to combine the first LED light emitted by the first LED light source module 111, the second LED light emitted by the second LED light source module 112, and the first combined light to obtain a target combined light source. For example, the basic light combining module can first combine the first LED light and the second LED light to obtain a second combined light, and then combine the second combined light with the first combined light to obtain a target combined light source.

[0054] The laser light source module 121 may emit a red laser or a laser light of other colors, which is not limited thereto.

[0055] In some embodiments,

[0056] Referring to Figures 1, 2, 3 and 4, the supplementary light combining module 22 may include a first supplementary light splitter 22a, the first supplementary light splitter 22a includes a first reflective area 22a1 and a first light-transmitting area 22a2, the first reflective area 22a1 is located outside the first light-transmitting area 22a2, the first reflective area 22a1 is used to reflect the third LED light, and the first light-transmitting area 22a2 is used to transmit laser.

[0057] The first light-reflecting region 22a1 may include a first coating for reflecting the light from the third LED, and the first light-transmitting region 22a2 may include a light-transmitting through hole or a light-transmitting material of uniform thickness to ensure smooth transmission of the laser light. It should be noted that in this embodiment, the shapes of the first light-reflecting region 22a1 and the first light-transmitting region 22a2 are not limited and can be configured based on actual needs. For example, the first light-reflecting region 22a1 may be an annular region, the two circles forming the annular region may be concentric circles, and the first light-transmitting region 22a2 may be a circular region, and this circular region may share the same center as the concentric circles.

[0058] In this embodiment, the third LED light can be a red LED light, and the laser light can be a red laser light. Most of the red LED light is reflected by the first coating on the first reflective region 22a1. Most of the red laser light passes through the diffuser 1213 and reaches the first light-transmitting region 22a2, where it then smoothly passes through the first light-transmitting region 22a2. The reflected red LED light and the transmitted red laser light travel in the same direction, thus allowing the first supplementary beam splitter 22a to combine the red LED light and the red laser light to produce the first combined light.

[0059] In some embodiments,

[0060] Referring to Figures 1, 2, 5 and 6, the supplementary light combining module 22 includes a second supplementary light splitter 22b, the second supplementary light splitter 22b includes a second reflective area 22b1 and a second light-transmitting area 22b2, the second light-transmitting area 22b2 is located outside the second reflective area 22b1, the second reflective area 22b1 is used to reflect the laser, and the second light-transmitting area 22b2 is used to transmit the third LED light.

[0061] The second light-reflecting region 22b1 includes a second coating for reflecting the laser light, and the second light-transmitting region 22b2 includes a non-coating region. It should be noted that in this embodiment, the shapes of the second light-reflecting region 22b1 and the second light-transmitting region 22b2 are not limited and can be set based on actual needs.

[0062] In this embodiment, the third LED light can be a red LED light, and the laser light can be a red laser light. Most of the red LED light can pass through the uncoated second light-transmitting region 22b2. Most of the red laser light passes through the diffuser 1213 and reaches the second light-reflecting region 22b1. It is then reflected by the second coating of the second light-reflecting region 22b1. The reflected red laser light and the transmitted red LED light travel in the same direction. Thus, the second supplementary beam splitter 22b combines the red LED light and the red laser light to produce the first combined light.

[0063] It should be noted that in the two aforementioned embodiments, since the etendue of red laser light is smaller than that of red LED light, a diffuser 1213 is placed before the red laser light is combined to address speckle without increasing the system's etendue. Furthermore, since the wavelength of red laser light is generally longer than that of red LED light, the color gamut of the mixed light source is wider than that of pure LED light. Because laser light has superior power density and photoelectric conversion efficiency to LED light, increased brightness can be achieved without significantly increasing the size of the projector.

[0064] In addition, referring to Figures 1, 3, and 5, the laser light source module 121 can include one set of laser light sources 1211 and laser collimating lenses 1212, or two sets of laser light sources 1211 and laser collimating lenses 1212, or more sets of laser light sources 1211 and laser collimating lenses 1212, without limitation. It is understood that the more laser light sources 1211 are provided, the more supplementary laser light can be provided. Furthermore, multiple sets of laser light sources 1211 and laser collimating lenses 1212 can share the same diffuser 1213, or multiple diffusers 1213 can be configured, without limitation.

[0065] The projector optical machine not only includes a basic light source module 11 composed of LED light sources and a corresponding basic light combining module, but also adds a supplementary light source module 12 and a supplementary light combining module 22. The newly added supplementary light source module 12 and the supplementary light combining module 22 can supplement the laser for the projector optical machine. The added laser light source 1211 is matched with the supplementary light combining module 22, and the difference in optical expansion is used to realize the light combining of laser and LED light. Among them, since the power density and photoelectric conversion efficiency of laser are better than those of LED light, the laser light source 1211 can increase the brightness without increasing the size of the projector optical machine too much, thereby ensuring the miniaturization of the projector optical machine. In addition, laser is coherent light, and LED light is incoherent light. The principle that incoherent light and coherent light are still incoherent light after mixing can be used to ensure that there is no speckle on the screen when the laser light source 1211 is added, thereby improving the viewing experience of the projector optical machine.

[0066] In one exemplary embodiment, a projection light engine is provided. Referring to Figures 1 and 2 , the supplemental light source module 12 may include a supplemental LED light source module 122, and the basic light combining module may include a first beam splitter 211. The supplemental LED light emitted by the supplemental LED light source module 122 passes through the first beam splitter 211 and is then transmitted to the first LED light source module 111, thereby causing the first LED light source module 111 to emit light.

[0067] The first LED light can be green LED light, the second LED light can be blue LED light, and the supplemental LED light can be the same blue LED light as the second LED light, or a dark blue LED light with a wavelength shorter than that of the second LED light. It should be noted that the principle of excitation is energy transition; the shorter the wavelength, the higher the theoretical energy. Furthermore, the supplemental LED light is only used as secondary excitation for the green LED light and does not enter the uniform light system 3. Therefore, selecting dark blue LED light with a shorter wavelength than the blue LED light as the supplemental LED light can better secondary excite the green LED light. Furthermore, since the human eye is most visually stimulated by green light, increasing the brightness of the green LED light by secondary excitation of the green LED light has a more significant effect on improving overall brightness.

[0068] It should be noted that the secondary excitation LED light can be not only green light, but also other colors of LED light according to actual needs, and there is no limitation on this. Correspondingly, the second LED light and the supplementary LED light can also be set according to actual needs, and there is no limitation on this.

[0069] In some embodiments,

[0070] As shown in Figures 1, 2, and 7, the first beam splitter 211 can be a first basic beam splitter 211a. The supplementary LED light source module 122 is arranged opposite the second LED light source module 112, and is located on either side of the first basic beam splitter 211a. The first basic beam splitter 211a is configured to reflect the blue LED light emitted by the second LED light source module 112 and the dark blue LED light emitted by the supplementary LED light source module 122. The first basic beam splitter 211a is configured to transmit the green LED light emitted by the first LED light source module 111. The dark blue LED light is reflected by the first basic beam splitter 211a and then transmitted to the first LED light source module 111, thereby re-stimulating the first LED light source module 111 to emit green LED light.

[0071] In this embodiment, the deep blue LED light emitted by the supplementary LED light source module 122 is directed toward the first basic beam splitter 211a. Utilizing the principle that the first basic beam splitter 211a transmits green light and reflects blue light, the deep blue LED light is reflected toward the first LED light source module 111, thereby secondary exciting the green LED light. The secondary excited green LED light has the same transmission direction as the green LED light initially emitted by the first LED light source module 111. The primary excited green LED light and the secondary excited green LED light can pass through the first basic beam splitter 211a. The blue LED light emitted by the second LED light source module 112 is reflected after passing through the first basic beam splitter 211a. The green LED light that passes through the second basic beam splitter 211b can be combined with the reflected blue LED light to obtain a second combined light, thereby achieving the supplementation of the green LED light. The deep blue LED light is only used as secondary excited green LED light and does not enter the uniform light system 3.

[0072] In some embodiments,

[0073] As shown in Figures 1, 2, and 8, the first beam splitter 211 may be a second basic beam splitter 211b. The supplementary LED light source module 122 is disposed opposite the first LED light source module 111 and is located on either side of the second basic beam splitter 211b. The second basic beam splitter 211b is configured to transmit the blue LED light emitted by the second LED light source module 112 and the dark blue LED light emitted by the supplementary LED light source module 122. The second basic beam splitter 211b is configured to reflect the green LED light emitted by the first LED light source module 111. After being transmitted by the second basic beam splitter 211b, the dark blue LED light is transmitted to the first LED light source module 111, thereby re-stimulating the first LED light source module 111 to emit green LED light.

[0074] In this embodiment, the deep blue LED light emitted by the supplementary LED light source module 122 is directed toward the second basic beam splitter 211b. Utilizing the principle that the second basic beam splitter 211b reflects green light and transmits blue light, the deep blue LED light is transmitted to the first LED light source module 111, causing secondary excitation of the green LED light. The secondary excited green LED light has the same transmission direction as the green LED light initially emitted by the first LED light source module 111. The primary excited green LED light and the secondary excited green LED light are reflected by the second basic beam splitter 211b. The blue LED light emitted by the second LED light source module 112 can directly pass through the second basic beam splitter 211b. The blue LED light that passes through the second basic beam splitter 211b can be combined with the reflected green LED light to obtain a second combined light, thereby achieving the supplementation of the green LED light. The deep blue LED light is only used as secondary excited green LED light and does not enter the light homogenization system 3.

[0075] It should be noted that, in the optical projection machine, the basic light combining system 212 may include a second beam splitter 212 , and the second light combined and the first light combined may be combined through the second beam splitter 212 , thereby obtaining a target light combined light source.

[0076] 1, 2, 9, and 10, the second beam splitter 212 may also be a third basic beam splitter 212a, which may be configured to reflect the second combined light and transmit the first combined light, thereby combining the first combined light and the second combined light. The second beam splitter 212 may be a fourth basic beam splitter 212b, which may be configured to reflect the first combined light and transmit the second combined light, thereby combining the first combined light and the second combined light.

[0077] In some embodiments,

[0078] As shown in Figures 1, 2, and 9, the first LED light is green, the second LED light is blue, the third LED light is red, the supplementary LED light is dark blue, and the laser light is red. The supplementary light combining module 22 includes a second supplementary beam splitter 22b, which includes a second reflective region 22b1 and a second light-transmitting region 22b2. The first beam splitter 211 of the basic light combining module can be the first basic beam splitter 211a, and the second beam splitter 212 can be the third basic beam splitter 212a.

[0079] In this embodiment, the deep blue LED light emitted by the supplemental LED light source module 122 is directed toward the first basic beam splitter 211a. Utilizing the principle that the first basic beam splitter 211a transmits green light and reflects blue light, the deep blue LED light is reflected toward the first LED light source module 111, causing secondary excitation of the green LED light. The secondary excitation of the green LED light aligns with the transmission direction of the green LED light initially emitted by the first LED light source module 111. The primary and secondary excitations of the green LED light can pass through the first basic beam splitter 211a. The blue LED light emitted by the second LED light source module 112 is reflected by the first basic beam splitter 211a and then transmitted through the second basic beam splitter 211b. The green LED light is then combined with the reflected blue LED light to produce a second combined light.

[0080] Most of the red LED light passes through the uncoated second light-transmitting region 22b2. Most of the red laser light passes through the diffuser 1213 and reaches the second light-reflecting region 22b1. It is then reflected by the second coating on the second light-reflecting region 22b1. The reflected red laser light and the transmitted red LED light travel in the same direction. Thus, the second supplementary beam splitter 22b combines the red LED light and the red laser light to produce the first combined light.

[0081] After the first combined light is transmitted to the third basic beam splitter 212a, it can directly pass through the third basic beam splitter 212a. The second combined light is transmitted to the fourth basic beam splitter 212b and then reflected. The reflected second combined light can be transmitted in the same direction as the transmitted first combined light, thereby realizing the combination of the first combined light and the second combined light, obtaining the target combined light source, and then transmitting it to the uniform light system 3.

[0082] In some embodiments,

[0083] As shown in Figures 1, 2, and 10, the first LED light is green, the second LED light is blue, the third LED light is red, the supplementary LED light is dark blue, and the laser light is red. The supplementary light combining module 22 includes a first supplementary beam splitter 22a, which includes a first reflective region 22a1 and a first light-transmitting region 22a2. The first beam splitter 211 of the basic light combining module can be the first basic beam splitter 211a, and the second beam splitter 212 can be the fourth basic beam splitter 212b.

[0084] In this embodiment, the deep blue LED light emitted by the supplemental LED light source module 122 is directed toward the first basic beam splitter 211a. Utilizing the principle that the first basic beam splitter 211a transmits green light and reflects blue light, the deep blue LED light is reflected toward the first LED light source module 111, causing secondary excitation of the green LED light. The secondary excitation of the green LED light aligns with the transmission direction of the green LED light initially emitted by the first LED light source module 111. The primary and secondary excitations of the green LED light can pass through the first basic beam splitter 211a. The blue LED light emitted by the second LED light source module 112 is reflected by the first basic beam splitter 211a and then transmitted through the second basic beam splitter 211b. The green LED light is then combined with the reflected blue LED light to produce a second combined light.

[0085] Most of the red LED light passes through the uncoated second light-transmitting region 22b2. Most of the red laser light passes through the diffuser 1213 and reaches the second light-reflecting region 22b1. It is then reflected by the second coating on the second light-reflecting region 22b1. The reflected red laser light and the transmitted red LED light travel in the same direction. Thus, the second supplementary beam splitter 22b combines the red LED light and the red laser light to produce the first combined light.

[0086] The first combined light is transmitted to the fourth basic beam splitter 212b and then reflected. The second combined light can be directly transmitted through the fourth basic beam splitter 212b after being transmitted to the fourth basic beam splitter 212b. The reflected first combined light can be transmitted in the same direction as the transmitted second combined light, thereby realizing the combination of the first combined light and the second combined light to obtain the target combined light source, which is then transmitted to the light homogenization system 3.

[0087] It should be noted that, in addition to the supplementary light combining module 22 , the first beam splitter 211 and the second beam splitter 212 can be the above combination or other combinations, which is not limited thereto.

[0088] For example, the supplementary light combining module 22 may include a first supplementary light splitter 22a, the first light splitter 211 may be a first basic light splitter 211a, and the second light splitter 212 may be a fourth basic light splitter 212b.

[0089] For another example, the supplementary light combining module 22 may include a first supplementary light splitter 22a, the first light splitter 211 may be a first basic light splitter 211a, and the second light splitter 212 may be a third basic light splitter 212a.

[0090] For another example, the supplementary light combining module 22 may include a first supplementary light splitter 22a, the first light splitter 211 may be a second basic light splitter 211b, and the second light splitter 212 may be a fourth basic light splitter 212b.

[0091] For another example, the supplementary light combining module 22 may include a first supplementary light splitter 22a, the first light splitter 211 may be a second basic light splitter 211b, and the second light splitter 212 may be a third basic light splitter 212a.

[0092] For another example, the supplementary light combining module 22 may include a second supplementary light splitter 22b, the first light splitter 211 may be a second basic light splitter 211b, and the second light splitter 212 may be a fourth basic light splitter 212b.

[0093] For another example, the supplementary light combining module 22 may include a second supplementary light splitter 22b, the first light splitter 211 may be a second basic light splitter 211b, and the second light splitter 212 may be a third basic light splitter 212a.

[0094] By adding a laser light source module 121, a supplementary light combining module 22 and a supplementary LED light source module 122, the projector can utilize the difference in optical extension to realize the light combining of laser and LED light, and utilize the supplementary LED light to secondary excite the first LED light, which can increase the brightness without increasing the size of the projector too much, ensuring the miniaturization of the projector, and ensuring that there is no speckle on the picture, thereby improving the viewing experience of the projector.

[0095] In one exemplary embodiment, a projector is provided. The projector may include the aforementioned projection light engine, thereby achieving the same technical effects as the aforementioned projection light engine, increasing brightness without significantly increasing the size of the projection light engine in the projector, thereby ensuring the miniaturization of the projection light engine and the projector, and ensuring that speckle-free images are displayed, thereby improving the viewing experience of the projector.

[0096] It should be understood that the terms used herein are for the purpose of describing specific example embodiments only and are not intended to be limiting. Unless the context clearly indicates otherwise, the singular forms "one", "an" and "said" as used herein may also be meant to include plural forms. The terms "comprise", "include", "contain" and "have" are inclusive and therefore specify the presence of stated features, steps, operations, elements and / or parts, but do not exclude the presence or addition of one or more other features, steps, operations, elements, parts, and / or combinations thereof. The method steps, processes, and operations described herein are not to be construed as necessarily requiring them to be performed in the specific order described or illustrated, unless the order of execution is clearly indicated. It should also be understood that additional or alternative steps may be used.

[0097] Although the terms first, second, third, etc. can be used in the text to describe multiple elements, components, regions, layers and / or sections, these elements, components, regions, layers and / or sections should not be limited by these terms. These terms can only be used to distinguish an element, component, region, layer or section from another region, layer or section. Unless the context clearly indicates otherwise, terms such as "first", "second" and other numerical terms do not imply order or sequence when used in the text. Therefore, the first element, component, region, layer or section discussed below can be referred to as the second element, component, region, layer or section without departing from the teaching of the example embodiments.

[0098] The foregoing description is intended only to provide specific embodiments of the present invention, intended to enable those skilled in the art to understand and implement the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not intended to be limited to the embodiments shown herein, but rather to be construed in the broadest manner consistent with the principles and novel features claimed herein.

Claims

1. A projection light machine, characterized in that: The projection optical machine includes a light source system and a light combining system, the light source system includes a basic light source module and a supplementary light source module, the light combining system includes a basic light combining module and a supplementary light combining module, the basic light source module includes a first LED light source module, a second LED light source module and a third LED light source module, and the supplementary light source module includes a laser light source module; The supplementary light combining module is used to combine the laser light emitted by the laser light source module and the third LED light emitted by the third LED light source module to obtain a first combined light; The basic light combining module is used to combine the first LED light emitted by the first LED light source module, the second LED light emitted by the second LED light source module, and the first combined light to obtain a target combined light source; Wherein, the supplementary light combining module includes a supplementary light splitter, and the supplementary light splitter includes a reflective area and a light-transmitting area; The reflective area is used to reflect the third LED light emitted by the third LED light source module, and the transparent area is used to transmit the laser emitted by the laser light source module; or, the reflective area is used to reflect the laser, and the transparent area is used to transmit the third LED light.

2. The projection light engine according to claim 1, characterized in that: The light-reflecting area is located at the periphery of the light-transmitting area, the light-reflecting area is used to reflect the third LED light, and the light-transmitting area is used to transmit the laser.

3. The projection light engine according to claim 2, characterized in that: The reflective area includes a first coating for reflecting the light of the third LED, and the transparent area includes a transparent through hole or a transparent material with uniform thickness.

4. The projection light engine according to claim 1, characterized in that: The light-transmitting area is located at the periphery of the light-reflecting area, the light-reflecting area is used to reflect the laser, and the light-transmitting area is used to transmit the third LED light.

5. The projection light engine according to claim 4, characterized in that: The reflective area includes a second coating for reflecting the laser, and the light-transmitting area includes a non-coating area.

6. The projection light engine according to claim 1, characterized in that: The laser light includes a red laser light, and the third LED light includes a red LED light.

7. The projection light engine according to claim 1, characterized in that: The laser light source module includes a laser light source, a laser collimating lens and a diffusion sheet. The laser collimating lens is located between the laser light source and the diffusion sheet, and the diffusion sheet is located between the laser collimating lens and the supplementary light combining module.

8. The projection light engine according to any one of claims 1 to 7, characterized in that: The supplementary light source module includes a supplementary LED light source module, and the basic light combining module includes a first beam splitter. The supplementary LED light emitted by the supplementary LED light source module passes through the first beam splitter and is transmitted to the first LED light source module to secondary stimulate the first LED light source module to emit light.

9. The projection light engine according to claim 8, characterized in that: The first beam splitter includes a second basic beam splitter, the supplementary LED light source module is arranged opposite to the first LED light source module, and is respectively located on both sides of the second basic beam splitter; the second basic beam splitter is used to transmit the second LED light and the supplementary LED light emitted by the supplementary LED light source module, and the second basic beam splitter is used to reflect the first LED light; the supplementary LED light is transmitted to the first LED light source module after passing through the second basic beam splitter.

10. A projector, characterized in that: The projector includes the projection optical engine according to any one of claims 1 to 9.

11. A projection light machine, characterized in that: The projection light machine includes a light source system and a light combining system, the light source system includes a basic light source module and a supplementary light source module, the light combining system includes a basic light combining module, and the basic light source module includes a first LED light source module, a second LED light source module and a third LED light source module; The supplementary light source module includes a supplementary LED light source module, and the basic light combining module includes a first beam splitter. The supplementary LED light emitted by the supplementary LED light source module passes through the first beam splitter and is then transmitted to the first LED light source module to secondary stimulate the first LED light source module to emit light; The light combining system is used to obtain a target light combining light source based on the first LED light emitted by the first LED light source module, the second LED light emitted by the second LED light source module, and the third LED light emitted by the third LED light source module.

12. The projection light engine according to claim 11, characterized in that: The first beam splitter includes a first basic beam splitter, the supplementary LED light source module and the second LED light source module are arranged opposite to each other and are respectively located on both sides of the first basic beam splitter; the first basic beam splitter is used to reflect the second LED light and the supplementary LED light emitted by the supplementary LED light source module, and the first basic beam splitter is used to transmit the first LED light; the supplementary LED light is reflected by the first basic beam splitter and transmitted to the first LED light source module.

13. The projection light engine according to claim 11, characterized in that: The first beam splitter includes a second basic beam splitter, the supplementary LED light source module is arranged opposite to the first LED light source module, and is respectively located on both sides of the second basic beam splitter; the second basic beam splitter is used to transmit the second LED light and the supplementary LED light emitted by the supplementary LED light source module, and the second basic beam splitter is used to reflect the first LED light; the supplementary LED light is transmitted to the first LED light source module after passing through the second basic beam splitter.

14. The projection light engine according to any one of claims 11 to 13, characterized in that: The supplementary light source module includes a laser light source module, and the supplementary light combining module is used to combine the laser light emitted by the laser light source module and the third LED light emitted by the third LED light source module to obtain a first combined light; The basic light combining module is used to combine the first LED light emitted by the first LED light source module, the second LED light emitted by the second LED light source module, and the first combined light to obtain a target combined light source.

15. The projection light engine according to claim 14, characterized in that: The supplementary light combining module includes a supplementary light splitter, and the supplementary light splitter includes a reflective area and a light-transmitting area; The reflective area is used to reflect the third LED light emitted by the third LED light source module, and the transparent area is used to transmit the laser emitted by the laser light source module; or, the reflective area is used to reflect the laser, and the transparent area is used to transmit the third LED light.

16. The projection light engine according to claim 15, characterized in that: The light-reflecting area is located at the periphery of the light-transmitting area, the light-reflecting area is used to reflect the third LED light, and the light-transmitting area is used to transmit the laser.

17. The projection light engine according to claim 16, wherein: The reflective area includes a first coating for reflecting the light of the third LED, and the transparent area includes a transparent through hole or a transparent material with uniform thickness.

18. The projection light engine according to claim 15, characterized in that: The light-transmitting area is located at the periphery of the light-reflecting area, the light-reflecting area is used to reflect the laser, and the light-transmitting area is used to transmit the third LED light.

19. The projection light engine according to claim 18, characterized in that: The reflective area includes a second coating for reflecting the laser, and the light-transmitting area includes a non-coating area.

20. The projection light engine according to claim 14, wherein: The laser light includes a red laser light, and the third LED light includes a red LED light.

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