Light source system and projection device

Abstract

The utility model discloses a light source system and a projection device, the light source system comprises a first LED light source, a second LED light source, a first laser light source, a light combining assembly and a light splitting assembly, the first LED light source emits first light along a first light path; the second LED light source emits second light along a second light path; the first laser light source emits third light along a third light path, the wavelength of the third light is larger than the wavelength of the first light and the wavelength of the second light, and the light splitting assembly can enable the third light of the first laser light source to enter the first LED light source so as to excite the brightness of the first LED light source; or the third light is emitted into the light combination assembly along a second light path of the second light, so that the brightness of the second light is increased; the third light can be absorbed when the brightness does not need to be improved; the brightness and the color gamut range of the projection device are improved by additionally arranging the light splitting assembly with the switchable state, and then the projection effect of the projection device is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to projection equipment technical field, especially a light source system and projection device. BACKGROUND

[0002] In the field of projection display, the projection light source is an important component of the projection system. The traditional projection light source includes Xenon light source, UHP (ultra-high pressure gas discharge lamp) light source, LED light source, laser-excited fluorescent powder light source, laser (RGB Laser / single double three-color) light source, etc. Due to the defects of the traditional light bulb, it is less and less used, while the LED light source, laser-excited fluorescent powder light source and laser light source show excellent characteristics in brightness, color, life, energy consumption, etc., and gradually become the mainstream of the projection display light source.

[0003] However, with the development of the projection light source, laser light source has been more and more used and liked by everyone. At present, it is difficult to meet the user's requirements for the projection quality of the projector with pure LED light source. INVENTION CONTENTS

[0004] The main purpose of the embodiment of the utility model is to provide a light source system and projection equipment, aiming at improving the technical problem of poor projection effect of the pure LED light source projection equipment in the prior art.

[0005] The embodiment of the utility model provides a light source system, comprising:

[0006] The first LED light source emits first light along a first light path;

[0007] The second LED light source emits second light along a second light path;

[0008] The first laser light source emits third light along a third light path, and the wavelength of the third light is greater than the wavelength of the first light and the wavelength of the second light;

[0009] The light combination component is arranged at the intersection of the first light path and the second light path, and is used for combining the light entering the light combination component and emitting along the first light path after combination;

[0010] The light splitting component is configured to be switchable between a first state, a second state and a third state;

[0011] When the light splitting component is in the first state, the third light is turned into the first LED light source;

[0012] When the light splitting component is in the second state, the third light is turned into the light combination component;

[0013] The third light is absorbed by the light splitting assembly when the light splitting assembly is in the third state.

[0014] In some embodiments of the utility model, the light splitting assembly includes a first mirror, a first light combining mirror and a light splitting wheel.

[0015] The first mirror is arranged on the first light path and is configured to transmit the first light and reflect the third light.

[0016] The first light combining mirror is arranged on the second light path and is configured to transmit the second light and reflect the third light.

[0017] The light splitting wheel is rotatably arranged on the third light path, and the light splitting wheel has a first functional part, a second functional part and a third functional part.

[0018] When the light splitting wheel is in the first state, the light splitting wheel rotates to a first position, the first functional part covers the third light path, and the first functional part is used for transmitting the third light into the first light path and to the first mirror, and the third light is reflected by the first mirror into the first LED light source.

[0019] When the light splitting wheel is in the second state, the light splitting wheel rotates to a second position, the second functional part covers the third light path, and the second functional part is used for reflecting the third light into the second light path and to the first light combining mirror, and the third light is reflected by the first light combining mirror into the light combining assembly along the second light path.

[0020] When the light splitting wheel is in the third state, the light splitting wheel rotates to a third position, the third functional part covers the third light path, and the third functional part is used for absorbing the third light.

[0021] In some embodiments of the utility model, the first light combining mirror includes a transmission surface and a reflection surface, the first light combining mirror is arranged on the second light path, and the transmission surface faces the second LED light source and the reflection surface faces the light combining assembly and the light splitting wheel.

[0022] The first light combining mirror is configured to receive the second light along the second light path through the transmission surface and emit the first light combining mirror along the second light path, receive the third light through the reflection surface, and reflect the third light towards the light combining assembly along the second light path through the reflection surface.

[0023] In some embodiments of the utility model, the first function part is larger than the second function part, the first function part is larger than the third function part, and the second function part is larger than or equal to the third function part.

[0024] In some embodiments of the utility model, the light source system further includes a third LED light source, the LED light source emits fourth light along a fourth light path to the light combination assembly, and the fourth light is emitted along the first light path after light combination by the light combination assembly.

[0025] In some embodiments of the utility model, the first LED light source includes at least a first LED light emitting part arranged along the first light path and a first light collecting lens, the first light collecting lens is used for collecting light emitted by the first LED light emitting part and forming the first light emitted along the first light path.

[0026] In some embodiments of the utility model, the second LED light source includes at least a second LED light emitting part arranged along the second light path and a second light collecting lens, the second light collecting lens is used for collecting light emitted by the second LED light emitting part and forming the second light emitted along the second light path.

[0027] In some embodiments of the utility model, the light combination assembly includes two dichroic mirrors arranged in cross.

[0028] In some embodiments of the utility model, a projection device is also provided, which includes the above light source system.

[0029] Embodiments of the utility model provide a light source system and a projection device, the light source system is through setting the light splitting component, when the light splitting component is in different states, the third light of the first laser light source can be emitted into the first LED light source to excite the brightness of the first LED light source, or the third light is emitted into the light combination assembly along the second light path of the second light, the brightness of the second light is increased, or the third light can be absorbed when the brightness is not required to be increased, that is, the utility model adds the light splitting component with switchable state, the brightness and the color gamut range of the projection device can be improved, and the projection effect of the projection device is improved. BRIEF DESCRIPTION OF DRAWINGS

[0030] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained from the structure shown in the drawings without creative labor.

[0031] Figure 1 Figure 1 is a structural schematic view of a light source system according to an embodiment of the present application, in which a light splitting assembly is in a first state;

[0032] Figure 2 Figure 2 is a structural schematic view of the light source system according to the embodiment of the present application, in which the light splitting assembly is in a second state;

[0033] Figure 3 Figure 3 is a structural schematic view of the light source system according to the embodiment of the present application, in which the light splitting assembly is in a third state;

[0034] Figure 4 Figure 4 is a structural schematic view of a light splitting wheel according to an embodiment of the present application.

[0035] Figures 110, first LED light source; 111, first LED light emitting part; 112, first light collecting lens; 120, second LED light source; 121, second LED light emitting part; 122, second light collecting lens; 130, first laser light source; 140, third LED light source; 141, third LED light emitting part; 142, third light collecting lens; 200, light combining assembly; 300, light splitting assembly; 310, light splitting wheel; 311, first function part; 312, second function part; 313, third function part; 314, rotating shaft; 320, first light combining reflector; 330, first reflector; 400, light homogenizing element; 500, light source relay element; 600, illumination relay element. DETAILED DESCRIPTION

[0036] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0037] It should be noted that all directionality indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain specific posture (as shown in the drawings), and if the specific posture changes, the directionality indications also change accordingly.

[0038] In the utility model, unless another definite provision and limitation, the terms "connect", "fix" and the like should be broad sense understanding, for example, "fix" can be fixed connection, also can be detachable connection, or be integrated;Can be mechanical connection, also can be electrical connection;Can be directly connected, also can be indirectly connected through the intermediate medium, can be two element internal communication or two element mutual action relation, unless another definite limitation.For ordinary skilled person in the art, the above terms can be understood according to the specific meaning in the utility model.

[0039] In addition, if the utility model embodiment involves "first", "second" and the like description, the "first", "second" and the like description is only for the purpose of description, and can not be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features.Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one feature.In addition, the meaning of "and / or" appearing throughout the text includes three parallel schemes, for example, "A and / or B" includes A scheme, or B scheme, or A and B simultaneously meet the scheme.In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on that ordinary skilled person in the art can realize, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the utility model.

[0040] As shown in Figures 1-4 The utility model provides a light source system, including first LED light source 110, second LED light source 120, first laser light source 130, light combiner 200 and light splitter 300. First LED light source 110 emits first light along the first light path. Second LED light source 120 emits second light along the second light path. First laser light source 130 emits third light along the third light path, and the wavelength of the third light is greater than the wavelength of the first light and the wavelength of the second light. Light combiner 200 is arranged at the intersection of the first light path and the second light path, and is used to combine the light incident into light combiner 200 and emit along the first light path. Light splitter 300 is configured to be switchable between a first state, a second state and a third state. When light splitter 300 is in the first state, the third light is redirected into first LED light source 110. When light splitter 300 is in the second state, the third light is redirected into light combiner 200. When light splitter 300 is in the third state, the third light is absorbed by light splitter 300.

[0041] Among them, first LED light source 110 is generally green LED lamp, second LED light source 120 is generally red LED lamp, and first laser light source 130 is a red laser light source.

[0042] In general, the first light path and the second light path are perpendicular to each other.

[0043] It can be understood that the light source system is provided with the light splitting component 300, so that when the light splitting component 300 is in different states, the third light of the first laser light source 130 can be incident into the first LED light source 110 to excite the brightness of the first LED light source 110, or the third light is incident into the light combining component 200 along the second light path of the second light to increase the brightness of the second light, or the third light can be absorbed when the brightness is not required to be increased. That is, the utility model can improve the brightness range and the color gamut range of the projection device by additionally arranging the light splitting component 300 which can switch states, thereby providing a user of the projection device with a brighter and more comfortable viewing environment.

[0044] In some embodiments, when the light splitting component 300 is in the third state, the first laser light source 130 can also be controlled to be turned off.

[0045] It can be understood that the essential purpose of arranging the third state for the light splitting component 300 is still to block the third light, so as to avoid affecting other light when it is not required to be used. In the scene where the light splitting component 300 needs to be quickly switched, the third state is added to the switching, so as to avoid repeatedly turning off and turning on the first laser light source 130 in a short time.

[0046] In some embodiments, the light splitting component 300 includes a first mirror 330, a first light combining mirror 320 and a light splitting wheel 310. The first mirror 330 is arranged on the first light path and is configured to transmit the first light and reflect the third light. The first light combining mirror 320 is arranged on the second light path and is configured to transmit the second light and reflect the third light.

[0047] In general, the first mirror 330 is arranged on the first light path in an inclined manner, which is generally a filter, that is, any wavelength of light except the wavelength of the third light can pass through, so as to realize the transmission of the first light and the reflection of the third light. That is, the first light is transmitted through the first mirror 330 and is incident into the light combining component 200, and the third light is reflected by the first mirror 330 and is incident into the LED light source.

[0048] The light splitting wheel 310 is rotatably arranged on the third light path, and has a first functional part 311, a second functional part 312, and a third functional part 313. When the light splitting wheel 310 is in the first state, the light splitting wheel 310 rotates to a first position, and the first functional part 311 covers the third light path. The first functional part 311 is configured to make the third light ray transmit into the first light path and be incident on the first mirror 330, and the third light ray is reflected by the first mirror 330 and is incident on the first LED light source. When the light splitting wheel 310 is in the second state, the light splitting wheel 310 rotates to a second position, and the second functional part 312 covers the third light path. The second functional part 312 is configured to make the third light ray reflect into the second light path and be incident on the first light combining mirror 320, and the third light ray is reflected by the first light combining mirror 320 and is incident on the light combining assembly 200 along the second light path. When the light splitting wheel 310 is in the third state, the light splitting wheel 310 rotates to a third position, and the third functional part 313 covers the third light path. The third functional part 313 is configured to absorb the third light ray.

[0049] In the above, the third light path covered by the functional part is completely covered, so as to ensure the complete processing of the third light ray and avoid the phenomenon of light leakage.

[0050] Specifically, the middle part of the light splitting wheel 310 is provided with a rotating shaft 314, and the first functional part 311, the second functional part 312, and the third functional part 313 are arranged around the rotating shaft 314. By rotating the rotating shaft 314, the first functional part 311, the second functional part 312, and the third functional part 313 are respectively arranged at positions capable of covering the third light path, and the third light ray is processed differently.

[0051] In the above, the first functional part 311 is a lens, the second functional part 312 is a mirror, and the third functional part 313 is a black mirror. The black mirror can absorb light rays of all wavelengths.

[0052] In some embodiments, the light splitting wheel 310 is a lens, a part of which is covered with a reflecting film to form a mirror, and a part of which is covered with a black film to form a black mirror.

[0053] In another embodiment, the light splitting assembly 300 can include the first mirror 330, the first light combining mirror 320, and a light splitting strip. The light splitting strip includes the first functional part 311, the second functional part 312, and the third functional part 313 arranged in sequence along a direction. The light splitting strip is driven to move back and forth by a rack and a motor, so as to switch the light splitting assembly 300 between the first state, the second state, and the third state.

[0054] In some embodiments, the first light-combining mirror 320 includes a transmitting surface and a reflecting surface, the first light-combining mirror 320 is disposed in the second light path, and the transmitting surface faces the second LED light source 120 and the reflecting surface faces the light-combining assembly 200 and the light-splitting wheel 310. The first light-combining mirror 320 is configured to receive the second light along the second light path by the transmitting surface and emit the second light out of the first light-combining mirror 320 along the second light path, receive the third light by the reflecting surface, and reflect the third light toward the light-combining assembly 200 along the second light path via the reflecting surface.

[0055] That is, the first light-combining mirror 320 essentially combines the second light and the third light to increase the brightness of the light of the wavelength corresponding to the second light in the projection device.

[0056] In some embodiments, the light-splitting wheel 310 is a disc structure, the area of the first functional part 311 is greater than the area of the second functional part 312, the area of the first functional part 311 is greater than the area of the third functional part 313, and the area of the second functional part 312 is greater than or equal to the area of the third functional part 313.

[0057] In some embodiments, the area of the first functional part 311 is 0.5 times the area of the disc structure, the area of the second functional part 312 is 0.25 times the area of the disc structure, and the area of the third functional part 313 is 0.25 times the area of the disc structure.

[0058] In some other embodiments, the area of the second functional part 312 can also be greater than the area of the third functional part.

[0059] In some embodiments, the light source system further includes a third LED light source 140, the LED light source emits fourth light along a fourth light path to the light-combining assembly 200, and the fourth light is emitted along the first light path after being combined by the light-combining assembly 200.

[0060] In some embodiments, the fourth light path is opposite to the second light path to enter the light-combining assembly 200, so that the fourth light is combined with the first light and the second light in the light-combining assembly 200 and then emitted.

[0061] In some embodiments, the third LED light source 140 is generally a blue LED lamp.

[0062] In some embodiments, the first LED light source 110 includes at least a first LED light emitting part 111 disposed along the first light path and a first light collecting lens 112 for collecting light emitted by the first LED light emitting part 111 and forming the first light emitted along the first light path.

[0063] That is, the first LED light emitting part 111 scatters light of a corresponding wavelength, and the light is collected by the first light collecting lens 112 to form the first light, so as to avoid wasting the light emitted by the first LED light emitting part 111.

[0064] In some embodiments, the second LED light source 120 comprises at least a second LED light emitting element 121 arranged along the second light path and a second light collecting lens 122 for collecting the light emitted by the second LED light emitting element 121 and forming the second light rays to be emitted along the second light path.

[0065] That is, the second LED light emitting element 121 scatters the light rays of corresponding wavelengths, which are collected by the second light collecting lens 122 and then form the second light rays.

[0066] In some embodiments, the third LED light source 140 can refer to the foregoing embodiments and comprises a third LED light emitting element 141 and a third light collecting lens 142.

[0067] In some embodiments, the light source system further comprises a light homogenizing element 400, and the light combining assembly 200 and the light homogenizing element 400 are arranged along the first light path in sequence, so that the light rays emitted by the light combining assembly 200 are emitted into the light homogenizing element 400 along the first light path.

[0068] It can be understood that the light homogenizing element 400 is arranged to make the light emitted by the projection device more uniform and avoid the display brightness from being different at different places.

[0069] In some embodiments, the light combining assembly 200 comprises two dichroic mirrors arranged in cross.

[0070] In some embodiments, the light source system further comprises a light source relay element 500, and the first LED light source 110, the light source relay element 500 and the light combining assembly 200 are arranged along the first light path in sequence.

[0071] The light source relay element 500 is configured to continue the first light path, so that the first light rays can reach the light combining assembly 200 smoothly.

[0072] In some embodiments, the light source system further comprises an illumination relay element 600, and the light combining assembly 200, the light homogenizing element 400 and the illumination relay element 600 are arranged along the first light path in sequence, and are configured to receive the light rays emitted by the light combining assembly 200 and output.

[0073] The illumination relay element 600 is configured to continue the first light path, so that the light rays emitted by the light homogenizing element 400 can continue to be emitted.

[0074] In some embodiments, the illumination relay element 600 and the light source relay element 500 are both convex lenses, which are configured to shape the light beams.

[0075] In some embodiments, a projection device is also provided, which comprises the light source system described above. Since the projection device at least comprises part or all of the embodiments of the light source system described above, the projection device at least has the beneficial effects of the part or all of the embodiments described above, which will not be repeated here.

[0076] The above merely describes optional embodiments of the present application, and does not limit the patent scope of the present application. Any equivalent structural transformation, or direct / indirect application in other related technical fields made under the application concept of the present application, and by using the content of the present application specification and drawings, are included in the patent protection scope of the present application.

Claims

1. A light source system, characterized by, The application relates to a light source, comprising: a first LED light source for emitting first light along a first light path; a second LED light source for emitting second light along a second light path; a first laser light source for emitting third light along a third light path, the wavelength of the third light being greater than the wavelengths of the first light and the second light; a light combination component arranged at the intersection of the first light path and the second light path, for combining the light entering the light combination component and then emitting the combined light along the first light path; a light splitting component configured to be switched between a first state, a second state and a third state; when the light splitting component is in the first state, the third light is reflected into the first LED light source; when the light splitting component is in the second state, the third light is reflected into the light combination component; when the light splitting component is in the third state, the third light is absorbed by the light splitting component.

2. The light source system of claim 1, wherein The light splitting component comprises a first reflector, a first light combination reflector and a light splitting wheel; the first reflector is arranged on the first light path and configured to transmit the first light and reflect the third light; the first light combination reflector is arranged on the second light path and configured to transmit the second light and reflect the third light; the light splitting wheel is rotatably arranged on the third light path and has a first functional part, a second functional part and a third functional part; when the light splitting wheel is in the first state, the light splitting wheel is rotated to a first position, the first functional part covers the third light path, and the first functional part is used for transmitting the third light into the first light path and reflecting the third light into the first LED light source by the first reflector; when the light splitting wheel is in the second state, the light splitting wheel is rotated to a second position, the second functional part covers the third light path, and the second functional part is used for reflecting the third light into the second light path and reflecting the third light into the first light combination reflector, and the third light is reflected by the first light combination reflector and then emitted along the second light path into the light combination component; when the light splitting wheel is in the third state, the light splitting wheel is rotated to a third position, the third functional part covers the third light path, and the third functional part is used for absorbing the third light.

3. The light source system of claim 2, wherein The first light combination reflector comprises a transmission surface and a reflection surface, the first light combination reflector is arranged on the second light path, the transmission surface faces the second LED light source, the reflection surface faces the light combination component and the light splitting wheel, and the first light combination reflector is configured to receive the second light along the second light path by the transmission surface, transmit the second light out of the first light combination reflector along the second light path, receive the third light by the reflection surface, and reflect the third light towards the light combination component along the second light path via the reflection surface. The light splitting wheel is in a disc structure, the area of the first functional part is greater than the area of the second functional part, the area of the first functional part is greater than the area of the third functional part, and the area of the second functional part is greater than or equal to the area of the third functional part.

4. The light source system of claim 2, wherein ​ 5. The light source system of claim 1, wherein The light source system further comprises a third LED light source, which emits fourth light along a fourth light path to the light combination component, and the fourth light is emitted along the first light path after being combined by the light combination component.

6. The light source system of claim 1, wherein, The first LED light source comprises at least a first LED light emitting element arranged along the first light path, and a first light collecting lens for collecting light emitted by the first LED light emitting element and forming the first light to be emitted along the first light path.

7. The light source system of claim 1, wherein The second LED light source comprises at least a second LED light emitting element arranged along the second light path, and a second light collecting lens for collecting light emitted by the second LED light emitting element and forming the second light to be emitted along the second light path.

8. The light source system of claim 1, wherein, The light source system further comprises a light homogenizing element, and the light combination component and the light homogenizing element are arranged along the first light path in sequence, so that the light emitted by the light combination component is emitted along the first light path into the light homogenizing element.

9. The light source system according to any one of claims 1 to 8, characterized in that The light combination component comprises two dichroic mirrors arranged in cross.

10. A projection apparatus, characterized by, The light source system according to any one of claims 1-9.

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