CN112305845A - Projection light path and projection equipment - Google Patents
Projection light path and projection equipment Download PDFInfo
- Publication number
- CN112305845A CN112305845A CN202011276057.6A CN202011276057A CN112305845A CN 112305845 A CN112305845 A CN 112305845A CN 202011276057 A CN202011276057 A CN 202011276057A CN 112305845 A CN112305845 A CN 112305845A
- Authority
- CN
- China
- Prior art keywords
- light
- wavelength
- light source
- wavelength light
- converged
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Classifications
-
- G—PHYSICS
- G03—PHOTOGRAPHY; CINEMATOGRAPHY; ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ELECTROGRAPHY; HOLOGRAPHY
- G03B—APPARATUS OR ARRANGEMENTS FOR TAKING PHOTOGRAPHS OR FOR PROJECTING OR VIEWING THEM; APPARATUS OR ARRANGEMENTS EMPLOYING ANALOGOUS TECHNIQUES USING WAVES OTHER THAN OPTICAL WAVES; ACCESSORIES THEREFOR
- G03B21/00—Projectors or projection-type viewers; Accessories therefor
- G03B21/14—Details
- G03B21/20—Lamp housings
- G03B21/2006—Lamp housings characterised by the light source
- G03B21/2013—Plural light sources
Abstract
The invention discloses a projection optical path and projection equipment, wherein the projection optical path comprises a first light source, a second light source, a third light source and a fourth light source, wherein the first light source emits first wavelength light, the second light source emits second wavelength light, the first wavelength light and the second wavelength light are converged, the third light source emits third wavelength light, the third wavelength light is emitted to the converged first wavelength light and the converged second wavelength light, the first wavelength light, the second wavelength light and the third wavelength light are respectively one of red light, green light and blue light, the fourth light source emits fourth wavelength light, the fourth wavelength light is converged with the first wavelength light, the second wavelength light and the third wavelength light, the wavelength range of the fourth wavelength light is in the wavelength range of the red light, the wavelength of the fourth wavelength light is defined to be lambda 1, and the wavelength of the red light set in the first wavelength light, the second wavelength light and the third wavelength light is lambda 2, so that: λ 1 ≠ λ 2. The technical scheme of the invention can reduce the generation of red light heat effect and effectively ensure the stable work of the whole projection light source system.
Description
Technical Field
The invention relates to the technical field of optical display, in particular to a projection light path and projection equipment.
Background
In optical projection display, a combination of red, green and blue lights is used as a projection light source, and in order to increase the brightness of a projection picture, the number of light rays of corresponding colors needs to be increased, that is, the luminous flux needs to be increased. The current way to increase the luminous flux is to increase the current of the respective power supply, whereby the light sources of the three colors can generate more light. However, the red light source is sensitive to temperature, and when the current is increased to a certain degree, the amount of red light is increased, thereby generating a thermal effect, and causing the luminous efficiency of the red light source to drop suddenly.
Disclosure of Invention
Based on this, in order to solve the problem that the luminous efficiency of the red light source is suddenly reduced due to the fact that the current is increased to a certain degree in the existing projection light source to generate the thermal effect, it is necessary to provide a projection light path and projection equipment, which aim to reduce the generation of the thermal effect of the red light and effectively ensure the stable work of the whole projection light source system.
In order to achieve the above object, the present invention provides a projection optical path, which includes:
a first light source emitting light of a first wavelength;
the second light source emits second-wavelength light, and the first-wavelength light and the second-wavelength light are converged;
a third light source, configured to emit a third wavelength light, where the third wavelength light is emitted toward the converged first wavelength light and the converged second wavelength light, colors of the first wavelength light, the converged second wavelength light, and the third wavelength light are different, and the first wavelength light, the converged second wavelength light, and the converged third wavelength light are red light, green light, and blue light, respectively; and
a fourth light source configured to emit a fourth wavelength light, the fourth wavelength light being converged with the first wavelength light, the second wavelength light, and the third wavelength light, a wavelength range of the fourth wavelength light being within a wavelength range of red light, where a wavelength of the fourth wavelength light is defined as λ 1, and a wavelength of red light set among the first wavelength light, the second wavelength light, and the third wavelength light is defined as λ 2, where: λ 1 ≠ λ 2.
Optionally, the projection light path includes a plurality of collimator sets, and the collimator sets are at least disposed in a light exit direction of one of the first light source, the second light source, the third light source, or the fourth light source.
Optionally, the collimating lens group includes a first collimating lens and a second collimating lens, the first collimating lens is disposed facing the corresponding light source, and the second collimating lens is disposed opposite to the corresponding light source;
the first collimating lens and the second collimating lens are any one of a spherical lens, an aspherical lens or a free-form surface lens.
Optionally, the projection optical path includes a first light splitter, the first light splitter is disposed in an optical path in an exit direction of the first wavelength light and the second wavelength light, the first light splitter has a first surface facing the first light source and a second surface facing the second light source, an antireflection film for antireflection of the first wavelength light is disposed on the first surface or the second surface, and a reflection film for reflecting the second wavelength light is disposed on the first surface or the second surface.
Optionally, the projection optical path further includes a first collecting mirror, and the first collecting mirror is disposed in an optical path on which the first wavelength light and the second wavelength light converge.
Optionally, the first collecting mirror has a convex surface, and the convex surface is disposed on a side of the first collecting mirror facing away from the first light source.
Optionally, the first collecting lens is made of one of glass and plastic.
Optionally, the wavelength λ 1 of the fourth wavelength light is greater than the wavelength λ 2.
Optionally, the projection light path includes an excitation light source that emits excitation light rays that are directed to the first light source, the second light source, or the third light source.
Furthermore, in order to achieve the above object, the present invention also provides a projection apparatus comprising a housing and a projection optical path as described above, the projection optical path being provided to the housing.
In the technical scheme provided by the invention, light with a first wavelength emitted by a first light source and light with a second wavelength emitted by a second light source are converged through a first light splitter, and light with a third wavelength emitted by a third light source is emitted to the converged light with the first wavelength and the converged light with the second wavelength. The first wavelength light, the second wavelength light and the third wavelength light are respectively one of red light, green light and blue light, and the three colors of light are combined to be used as a light source for projecting pictures. The fourth light source emits light with a fourth wavelength, and the light with the fourth wavelength is converged together with the light with the first wavelength, the light with the second wavelength and the light with the third wavelength. The fourth wavelength light is red, so that when the brightness of a projection picture is increased, the red of the projection light source is provided by the two light sources, the condition that the heat effect occurs in a single red light source is reduced, and the problem of sudden drop of the luminous efficiency is reduced, so that the projection light source can work stably.
Further, the red wavelength of the fourth wavelength light is different from the wavelength of red light in the first light source, the second light source, or the third light source. Therefore, the projection light path can be divided into multiple paths for transmission, the mutual interference of the fourth wavelength light of the fourth light source and the red light in the other three light sources is reduced, and the light is ensured to be emergent after being combined at the same position.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural diagram of a first embodiment of a projection optical path according to the present invention;
FIG. 2 is a schematic structural diagram of another light-emitting direction of the projection optical path shown in FIG. 1 according to the present invention;
FIG. 3 is a schematic structural diagram of a second embodiment of a projection optical path according to the present invention;
FIG. 4 is a schematic structural diagram of a third embodiment of a projection optical path according to the present invention;
FIG. 5 is a schematic structural diagram of a fourth embodiment of a projection optical path according to the present invention;
FIG. 6 is a schematic structural diagram of a fifth embodiment of a projection optical path according to the present invention;
FIG. 7 is a schematic structural diagram of a sixth embodiment of a projection optical path according to the present invention;
FIG. 8 is a schematic structural diagram of a seventh embodiment of a projection optical path according to the present invention;
FIG. 9 is a schematic structural diagram of an eighth embodiment of a projection optical path according to the present invention;
FIG. 10 is a schematic structural diagram of a ninth embodiment of a projection optical path according to the present invention;
FIG. 11 is a schematic structural diagram of a tenth embodiment of a projection optical path according to the present invention;
FIG. 12 is a schematic structural diagram of an eleventh embodiment of a projection optical path according to the present invention;
FIG. 13 is a schematic structural diagram of a twelfth embodiment of a projection optical path according to the present invention;
FIG. 14 is a schematic structural diagram of a thirteenth embodiment of the projection optical path of the present invention;
FIG. 15 is a schematic structural diagram of a fourteenth embodiment of a projection optical path according to the present invention;
FIG. 16 is a schematic structural diagram of a fifteenth embodiment of a projection optical path according to the present invention;
FIG. 17 is a schematic structural diagram of a sixteenth embodiment of a projection optical path according to the present invention;
FIG. 18 is a schematic structural diagram of a seventeenth embodiment of a projection optical path according to the present invention;
FIG. 19 is a diagram illustrating the structure of an eighteenth embodiment of the projection optical path of the present invention;
fig. 20 is a schematic structural diagram of a nineteenth embodiment of the projection optical path of the present invention.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 10 | |
740 | The |
| 20 | |
750 | |
| 30 | |
760 | The sixth |
| 40 | |
770 | Seventh |
| 50 | |
810 | |
| 60 | |
820 | |
| 610 | First |
830 | |
| 620 | Second |
840 | Fourth condenser |
| 710 | A |
910 | First light |
| 720 | The |
920 | Second light |
| 730 | The third light splitter |
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are only for descriptive purposes and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.
In the present invention, unless otherwise expressly stated or limited, the terms "connected," "secured," and the like are to be construed broadly, and for example, "secured" may be a fixed connection, a removable connection, or an integral part; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
In addition, the technical solutions in the embodiments of the present invention may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination of technical solutions should not be considered to exist, and is not within the protection scope of the present invention.
In optical projection display, a combination of red, green and blue lights is used as a projection light source, and in order to increase the brightness of a projection picture, the current of a corresponding power supply is generally increased, so that the light sources corresponding to the three colors can generate more light. However, the red light source is sensitive to temperature, and when the current is increased to a certain degree, the amount of red light is increased, thereby generating a thermal effect, and causing the luminous efficiency of the red light source to drop suddenly.
In order to solve the above problem, referring to fig. 1, the present invention provides a projection optical path, including: a first light source 10, a second light source 20, a third light source 30 and a fourth light source 40. The light emitted by the first light source 10, the second light source 20, the third light source 30 and the fourth light source 40 are converged to form an emergent display picture. The first Light source 10, the second Light source 20, the third Light source 30, and the fourth Light source 40 may be any one of Light-emitting diodes (LEDs), semiconductor Lasers (LDs), and Super Luminescent Diodes (SLDs).
The first light source 10 emits light of a first wavelength, the second light source 20 emits light of a second wavelength, and the light of the first wavelength and the light of the second wavelength converge. The emitting directions of the first wavelength light and the second wavelength light are crossed with each other, for example, the emitting directions of the first wavelength light and the second wavelength light are perpendicular. So that the first wavelength light and the second wavelength light are converged in a crossed manner.
The third light source 30 emits a third wavelength light, the third wavelength light is emitted to the converged first wavelength light and second wavelength light, the colors of the first wavelength light, the second wavelength light and the third wavelength light are different, and the first wavelength light, the second wavelength light and the third wavelength light are respectively one of red light, green light and blue light; when the first wavelength light is green light, the second wavelength light may be red light, and the third wavelength light is blue light, or when the first wavelength light is green light, the second wavelength light may be blue light, and the third wavelength light is red light. The first wavelength light may be red light, the second wavelength light may be green light, and the third wavelength light may be blue light, or the first wavelength light may be red light, the second wavelength light may be blue light, and the third wavelength light may be green light. When the first wavelength light is blue light, the second wavelength light may be green light, and the third wavelength light may be red light, or when the first wavelength light is blue light, the second wavelength light may be red light, and the third wavelength light may be green light. The colors of the first wavelength light, the second wavelength light and the third wavelength light are selected from red light, green light and blue light, and the colors of the three wavelength lights are different.
The fourth light source 40 emits a fourth wavelength light, the fourth wavelength light is converged with the first wavelength light, the second wavelength light and the third wavelength light, a wavelength range of the fourth wavelength light is within a wavelength range of red light, a wavelength of the fourth wavelength light is defined as λ 1, and a wavelength of the red light set among the first wavelength light, the second wavelength light and the third wavelength light is λ 2, so that: λ 1 ≠ λ 2. For example, the wavelength range of red light is 600nm to 740nm, the wavelength λ 2 of the first wavelength light is 620nm, and the wavelength λ 1 of the fourth wavelength light is 650 nm. For another example, when the wavelength λ 2 of the first wavelength light is 625nm, the wavelength λ 1 of the fourth wavelength light is 660 nm. For example, the light with the fourth wavelength is converged with the light with the third wavelength, and then converged with the light with the first wavelength and the light with the second wavelength. Or, the fourth wavelength light is converged with the second wavelength light and then converged with the first wavelength light, and then the first wavelength light, the second wavelength light and the fourth wavelength light are converged with the third wavelength light. The first wavelength light and the second wavelength light are converged first, the third wavelength light is converged again with the converged first wavelength light and the converged second wavelength light, and the fourth wavelength light is finally emitted to the converged first wavelength light, the converged second wavelength light and the converged third wavelength light. The order of the fourth wavelength light reference and the convergence combination is not limited herein.
In the technical solution provided in this embodiment, the first wavelength light emitted by the first light source 10 and the second wavelength light emitted by the second light source 20 are converged by the first light splitter 710, and the third wavelength light emitted by the third light source 30 is emitted to the converged first wavelength light and second wavelength light. The first wavelength light, the second wavelength light and the third wavelength light are respectively one of red light, green light and blue light, and the three colors of light are combined to be used as a light source for projecting pictures. The fourth light source 40 emits light of a fourth wavelength, and the light of the fourth wavelength is converged together with the light of the first wavelength, the light of the second wavelength, and the light of the third wavelength. The fourth wavelength light is red, so that when the brightness of a projection picture is increased, the red of the projection light source is provided by the two light sources, the condition that the heat effect occurs in a single red light source is reduced, and the problem of sudden drop of the luminous efficiency is reduced, so that the projection light source can work stably.
Further, the red wavelength of the fourth wavelength light is different from the wavelength of the red light in the first light source 10, the second light source 20, or the third light source 30. Therefore, the projection light path can be divided into multiple paths for transmission, the mutual interference of the fourth wavelength light of the fourth light source 40 and the red light in the other three light sources is reduced, and the light is ensured to be emergent after being combined at the same position.
In the above embodiment, the projection light path includes a plurality of collimator lens groups 60, and the collimator lens groups 60 are at least disposed in the light emitting direction of one of the first light source 10, the second light source 20, the third light source 30, or the fourth light source 40. The collimating lens group 60 is used to convert the passing light rays into a mutually parallel form. The angle of the emergent light of the corresponding light source can be adjusted through the collimation effect of the collimating lens group 60, so that the light can be effectively converged.
Further, the collimating lens group 60 includes a first collimating lens 610 and a second collimating lens 620, the first collimating lens 610 is disposed facing the corresponding light source, and the second collimating lens is disposed opposite to the corresponding light source; the first collimating lens 610 and the second collimating lens 620 are any one of a spherical lens, an aspherical lens, or a free-form lens. In addition, the collimator lens group 60 may further include three collimator lenses. Similarly, the lens surface shapes of the three collimating lenses may be any one of a spherical lens, an aspherical lens, and a free-form lens. The mutual collocation of a plurality of collimating lenses can obtain better collimation effect.
After the light of each light source is transmitted, the diameter of the light path becomes larger, that is, the light gradually diverges. In order to reduce the divergence of the light, the projection optical path further includes a first condenser 810, and the first condenser 810 is disposed in the optical path where the first wavelength light and the second wavelength light converge. The light converging action of the first light-converging lens 810 can converge the converged first wavelength light and second wavelength light, thereby reducing the divergence of the light.
In the above embodiment, the projection optical path includes the first light splitter 710, the first light splitter 710 is disposed in the optical path in the exit direction of the first wavelength light and the second wavelength light, the first light splitter 710 has a first surface facing the first light source 10 and a second surface facing the second light source 20, the first surface or the second surface is provided with an antireflection film for increasing the transmittance of the first wavelength light, and the first surface or the second surface is provided with a reflection film for reflecting the second wavelength light. For example, the first surface may be provided with an antireflection film for increasing the wavelength of the first light, the second surface may be provided with a reflection film for reflecting the wavelength of the second light, the antireflection film for the wavelength of the first light and the reflection film for the wavelength of the second light may be both disposed on the first surface, and the antireflection film for the wavelength of the first light and the reflection film for the wavelength of the second light may be both disposed on the second surface. The antireflection film for the first wavelength light is close to the first light source 10, and the reflection film for the second wavelength light is close to the second light source 20. The first wavelength light and the second wavelength light are converged by the transmission of the first wavelength light and the reflection of the second wavelength light by the first light splitter 710. Wherein, the surface of the first light splitter 710 facing the first light source 10 and the included angle of the light with the first wavelength are between 0 ° and 90 °. For example, the included angle is 45 °, and thus the surface of the first light splitter 710 facing the second light source 20 and the included angle of the light with the second wavelength are also 45 °, so that the light from the first light source 10 and the light from the second light source 20 can be effectively converged.
Further, in order to better converge the light, the first condenser 810 has a convex surface, and the convex surface is disposed on a side of the first condenser 810 facing away from the first light source 10. Therefore, light is refracted after passing through the convex surface, so that the light can be deflected towards the optical axis position, and the light convergence effect is improved.
Further, the material of the first collecting lens 810 is one of glass and plastic. The first condenser 810 made of glass has better optical transmission and refraction properties, thereby improving the light convergence effect. The first collecting lens 810 made of plastic is convenient to process and manufacture, and the product can be processed through thermoplastic molding, so that the processing efficiency can be effectively improved.
In one embodiment, the wavelength λ 1 of the fourth wavelength light is greater than the wavelength λ 2. For example, if the wavelength of the first wavelength light is λ 2, and the wavelength λ 2 of the first wavelength light is 620nm, the wavelength λ 1 of the fourth wavelength light is 650 nm. It is known that the light of the first wavelength is light red and the light of the fourth wavelength is dark red. The light with the two colors is transmitted along different light paths and then converged, so that the heat effect caused by the increase of the current of a single light source is reduced.
In addition, in order to ensure that the thermal effect can be effectively relieved by adding the light with the fourth wavelength, the wavelength range of the light with the fourth wavelength is between 600nm and 740 nm. The fourth wavelength light is selected in the range, so that the color of the fourth wavelength light can be ensured to be red, the color deviation of the fourth wavelength light is avoided, and the red light heat effect cannot be relieved.
In order to further improve the light emitting efficiency of the projection light path, the projection light path includes an excitation light source 50, and the excitation light source 50 emits excitation light, which is emitted to the first light source 10, the second light source 20, or the third light source 30, so as to increase fluorescent molecules of the corresponding light source, thereby improving the light emitting efficiency of the corresponding light source.
Referring to fig. 1, in the first embodiment of the present invention, the projection light path further includes a second dichroic sheet 720 and a second condenser 820. The second light splitter 720 is disposed in the light emitting direction of the third light source 30, one surface of the second light splitter 720 faces the third light source 30, the other surface of the second light splitter 720 faces the fourth light source 40, and the second condenser 820 is disposed in the light path of the second light splitter 720 away from the third light source 30. An antireflection film for light with a third wavelength is disposed on a surface of the second light splitter 720 facing the third light source 30, a reflective film for light with a fourth wavelength is disposed on a surface of the second light splitter 720 facing the fourth light source 40, the light with the third wavelength is transmitted through the second light splitter 720, and the light with the fourth wavelength is reflected by the second light splitter 720, so that the light with the third wavelength and the light with the fourth wavelength are converged. The projection optical path further includes a third light splitter 730, and the third light splitter 730 is disposed at a convergence intersection position of the first wavelength light and the third wavelength light. The light of the first wavelength, the light of the second wavelength, the light of the third wavelength and the light of the fourth wavelength can be converged and combined through the transmission and reflection of the third light splitter 730. It should be noted that the antireflection film for the light with the third wavelength and the reflection film for the light with the fourth wavelength are disposed on the same surface of the second light splitter 720, and the antireflection film for the light with the third wavelength is close to the third light source 30 and the reflection film for the light with the fourth wavelength is close to the fourth light source 40.
Specifically, the projection optical path includes a first light-exiting end surface 910, and the first light-exiting end surface 910 is perpendicular to the exiting direction of the first wavelength light. The first wavelength light and the second wavelength light are transmitted through the third polarizer 730, the third wavelength light and the fourth wavelength light are reflected by the third polarizer 730, the first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are converged by the third polarizer 730, and the converged first wavelength light, the converged second wavelength light, the converged third wavelength light and the converged fourth wavelength light are emitted from the first light-emitting end face 910. The surface of the third light splitter 730 facing the first light splitter 710 is provided with antireflection films for the first wavelength light and the second wavelength light, and the surface of the third light splitter 730 facing the second light splitter 720 is provided with reflection films for the third wavelength light and the fourth wavelength light. Therefore, when the third polarizer 730 transmits the light with the first wavelength and the light with the second wavelength and reflects the light with the third wavelength and the light with the fourth wavelength, the light with the first wavelength, the light with the second wavelength, the light with the third wavelength and the light with the fourth wavelength can be converged and combined, and then emitted from the first light-emitting end face 910. It should be noted that the antireflection films for the first wavelength light and the second wavelength light and the reflection films for the third wavelength light and the fourth wavelength light are disposed on the same surface of the third polarizer 730, the antireflection films for the first wavelength light and the second wavelength light are disposed near the first light source 10, and the reflection films for the third wavelength light and the fourth wavelength light are disposed near the third light source 30.
In addition, referring to fig. 2, in the embodiment, another light emitting direction is further provided, the projection light path includes a second light emitting end surface 920, the second light emitting end surface 920 is parallel to the emitting direction of the first wavelength light, the first wavelength light and the second wavelength light are reflected by the third light splitter 730, the third wavelength light and the fourth wavelength light are transmitted by the third light splitter 730, the first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are converged by the third light splitter 730, and the converged first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are emitted from the second light emitting end surface 920. A reflective film for the first wavelength light and the second wavelength light is disposed on a surface of the third light splitter 730 facing the first light splitter 710, and an anti-reflective film for the third wavelength light and the fourth wavelength light is disposed on a surface of the third light splitter 730 facing the second light splitter 720. Therefore, when the third light splitter 730 reflects the light with the first wavelength and the light with the second wavelength and transmits the light with the third wavelength and the light with the fourth wavelength, the light with the first wavelength, the light with the second wavelength, the light with the third wavelength and the light with the fourth wavelength can be converged and combined, and then the light is emitted from the second light-emitting end face 920. It should be noted that the reflective films for the first wavelength light and the second wavelength light and the anti-reflection films for the third wavelength light and the fourth wavelength light are disposed on the same surface of the third light splitter 730, the reflective films for the first wavelength light and the second wavelength light are disposed near the first light source 10, and the anti-reflection films for the third wavelength light and the fourth wavelength light are disposed near the third light source 30.
Referring again to fig. 1, in order to flexibly adjust the installation positions of the respective optical components of the projection optical path according to the installation space, the second light source 20 and the third light source 30 are disposed at the upper side of the first wavelength light emitting optical path, and the fourth light source 40 is disposed at the right side of the third wavelength light emitting optical path away from the first light source 10. Therefore, in the embodiment, only the space on one side of the light path for emitting the first wavelength light is utilized, and the space on the other side can be saved.
Referring to fig. 3, a second embodiment of the present invention is proposed on the basis of the first embodiment of the present invention, wherein the second light source 20 and the third light source 30 are disposed at upper and lower sides of the emitting direction of the first wavelength light, and the fourth light source 40 is disposed at the right side of the emitting optical path of the third wavelength light away from the first light source 10. Therefore, in this embodiment, the space on the side of the light path for emitting the first wavelength light with respect to the second light source 20 can be saved.
Referring to fig. 4, a third embodiment of the present invention is proposed on the basis of the first embodiment of the present invention, wherein the second light source 20 and the third light source 30 are disposed at upper and lower sides of the emitting direction of the first wavelength light, and the fourth light source 40 is disposed at the left side of the emitting optical path of the third wavelength light close to the first light source 10. As can be seen from this, in the present embodiment, the space on the side of the light path for emitting light with the first wavelength with respect to the second light source 20 can be fully utilized, and the space on the side of the light path for emitting light with the third wavelength with respect to the fourth light source 40 can be saved.
Referring to fig. 5, in the fourth embodiment of the present invention, the projection light path further includes a fourth light splitter 740 and a third light splitter 830, the fourth light splitter 740 is disposed in the light path between the second light source 20 and the first light splitter 710, one surface of the fourth light splitter 740 faces the second light source 20, the other surface of the fourth light splitter 740 faces the fourth light source 40, and the second wavelength light and the fourth wavelength light are converged by the fourth light splitter 740. An antireflection film for light with the second wavelength is disposed on one surface of the fourth light splitter 740 facing the second light source 20, and a reflective film for light with the fourth wavelength is disposed on the other surface of the fourth light splitter 740 facing the fourth light source 40, so that the light with the second wavelength and the light with the fourth wavelength are converged by the transmission of the fourth light splitter 740 for the light with the second wavelength and the reflection of the light with the fourth wavelength. The anti-reflection film for light of the second wavelength and the reflection film for light of the fourth wavelength may be disposed on the same surface of the fourth light splitter 740, the anti-reflection film for light of the second wavelength is disposed near the second light source 20, and the reflection film for light of the fourth wavelength is disposed near the fourth light source 40. The third focusing lens 830 is disposed in the optical path between the fourth light splitter 740 and the first light splitter 710, and the converged second wavelength light and the converged fourth wavelength light are emitted to the third focusing lens 830. The light of the second wavelength and the light of the fourth wavelength can be converged and converged by the light-converging action of the third light-converging mirror 830, so that the divergence of the light rays is reduced. Here, the second surface of the first light splitting sheet 710 is provided with a reflective film that reflects the second wavelength light and the fourth wavelength light. The first wavelength light transmits the first light splitter 710 so that the first wavelength light, the second wavelength light and the fourth wavelength light are converged. The reflection film for the second wavelength light and the reflection film for the fourth wavelength light, and the antireflection film for the first wavelength light may be disposed on the same surface of the first light splitter 710, and the antireflection film for the first wavelength light is disposed close to the first light source 10, and the reflection film for the second wavelength light and the reflection film for the fourth wavelength light are disposed close to the second light source 20.
The projection light path further includes a fifth light splitter 750, the fifth light splitter 750 is disposed in a light path of the first light splitter 710 away from the first light source 10, one surface of the fifth light splitter 750 faces the first light splitter 710, the other surface of the fifth light splitter 750 faces the third light source 30, the converged first wavelength light, the converged second wavelength light and the converged fourth wavelength light are emitted to one surface of the fifth light splitter 750, and the converged third wavelength light is emitted to the other surface of the fifth light splitter 750. Therefore, the four light rays all irradiate the fifth light splitter 750, and under the action of the light splitting transmission and the light splitting reflection of the fifth light splitter 750, the four light rays can be effectively converged and combined.
Specifically, the projection optical path includes a first light-emitting end surface 910, the first light-emitting end surface 910 is perpendicular to the emitting direction of the first wavelength light, the second wavelength light, and the fourth wavelength light are transmitted through the fifth light-splitting sheet 750, the third wavelength light is reflected by the fifth light-splitting sheet 750, the first wavelength light, the second wavelength light, the third wavelength light, and the fourth wavelength light are converged by the fifth light-splitting sheet 750, and the converged first wavelength light, the second wavelength light, the third wavelength light, and the fourth wavelength light are emitted from the first light-emitting end surface 910. Antireflection films for light with the first wavelength, light with the second wavelength, and light with the fourth wavelength are disposed on a surface of the fifth light splitter 750 facing the first light splitter 710, and a reflective film for light with the third wavelength is disposed on a surface of the fifth light splitter 750 facing the third light source 30. Therefore, when the fifth light splitter 750 transmits the light of the first wavelength, the light of the second wavelength, and the light of the fourth wavelength and reflects the light of the third wavelength, the light of the first wavelength, the light of the second wavelength, the light of the third wavelength, and the light of the fourth wavelength can be converged and combined to be emitted from the first light emitting end surface 910. Antireflection films for the first wavelength light, the second wavelength light and the fourth wavelength light and a reflection film for the third wavelength light may be disposed on the same surface of the fifth light splitter 750, the antireflection films for the first wavelength light, the second wavelength light and the fourth wavelength light are disposed near the first light source, and the reflection film for the third wavelength light is disposed near the third light source.
In addition, another light emitting direction is provided in this embodiment, the projection light path includes a second light emitting end surface 920, the second light emitting end surface 920 is parallel to the emitting direction of the first wavelength light, the second wavelength light and the fourth wavelength light are reflected by the fifth light splitter 750, the third wavelength light is transmitted by the fifth light splitter 750, the first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are converged by the third light splitter 730, and the converged first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are emitted from the second light emitting end surface 920. Reflective films of light with the first wavelength, light with the second wavelength, and light with the fourth wavelength are disposed on a surface of the fifth light splitter 750 facing the first light splitter 710, and an antireflection film of light with the third wavelength is disposed on a surface of the fifth light splitter 750 facing the third light source 30. Therefore, when the fifth light splitter 750 reflects the light with the first wavelength, the light with the second wavelength, and the light with the fourth wavelength and transmits the light with the third wavelength, the light with the first wavelength, the light with the second wavelength, the light with the third wavelength, and the light with the fourth wavelength can be converged and combined to be emitted from the second light emitting end face 920. Similarly, the reflective films for the first wavelength light, the second wavelength light, and the fourth wavelength light, and the anti-reflective film for the third wavelength light may be disposed on the same surface of the fifth light splitting plate 750, the reflective films for the first wavelength light, the second wavelength light, and the fourth wavelength light are disposed near the first light source, and the anti-reflective film for the third wavelength light is disposed near the third light source.
Referring again to fig. 5, in order to flexibly adjust the installation position of the projection light path according to the installation space, the second light source 20 and the third light source 30 are disposed at the upper side of the light path for emitting the first wavelength light, and the first light source 10 and the fourth light source 40 are disposed at the left side of the light path for emitting the second wavelength light. Therefore, in the present embodiment, the space of the light path for emitting the first wavelength light below the second light source 20 can be saved.
Referring to fig. 6, a fifth embodiment of the present invention is provided on the basis of the fourth embodiment of the present invention, in which the second light source 20 and the third light source 30 are disposed at upper and lower sides of the light path for emitting the first wavelength light, and the first light source 10 and the fourth light source 40 are disposed at a left side of the light path for emitting the second wavelength light. Therefore, in this embodiment, the space on the upper side of the light path for emitting the first wavelength light with respect to the third light source 30 can be saved.
Referring to fig. 7, a sixth embodiment of the present invention is proposed based on the fourth embodiment of the present invention, in which a second light source 20 and a third light source 30 are disposed at upper and lower sides of an optical path for emitting light of a first wavelength, and a first light source 10 and a fourth light source 40 are disposed at left and right sides of an optical path for emitting light of a second wavelength. As can be seen, in this embodiment, the space on the side of the first wavelength light outgoing optical path with respect to the second light source 20 can be fully utilized. Of course, in order to avoid the interference effect of the fourth light source 40 on the second light-exiting end surface 920, the distance between the fifth light splitter 750 and the first condenser 810 can be extended, so as to separate the second light-exiting end surface 920 from the fourth light source 40.
Referring to fig. 8, in the seventh embodiment of the present invention, the projection light path further includes a sixth dichroic sheet 760 and a fourth condenser 840, the sixth dichroic sheet 760 is disposed in the emitting direction of the third light source 30, one surface of the sixth dichroic sheet 760 faces the third light source 30, the other surface of the fourth dichroic sheet 740 faces the first light source 10, and the light with the first wavelength, the light with the second wavelength, and the light with the third wavelength are collected by the sixth dichroic sheet 760. A reflective film for the third wavelength light is disposed on one surface of the sixth dichroic sheet 760 facing the third light source 30, and antireflection films for the first wavelength light and the second wavelength light are disposed on the other surface of the sixth dichroic sheet 760 facing the first light source 10, so that the first wavelength light, the second wavelength light, and the third wavelength light are converged by the transmission of the sixth dichroic sheet 760 for the first wavelength light and the second wavelength light and the reflection of the third wavelength light. The antireflection film for the first wavelength light and the second wavelength light, and the reflection film for the third wavelength light may be disposed on the same surface of the sixth dichroic sheet 760, the antireflection film for the first wavelength light and the second wavelength light is disposed near the first light source 10, and the reflection film for the third wavelength light is disposed near the third light source 30. The fourth condenser 840 is disposed in the light path of the sixth light splitter 760 and the first light splitter 710 away from the first light source 10, and the converged first wavelength light, the second wavelength light, and the third wavelength light are emitted to the fourth condenser 840. The light of the first wavelength, the light of the second wavelength and the light of the third wavelength can be converged and converged by the light-converging action of the third light-converging mirror 830, so that the divergence of the light is reduced.
The projection light path further includes a seventh light splitting sheet 770, the seventh light splitting sheet 770 is disposed in a light path of the first light splitting sheet 710 far away from the first light source 10, one surface of the seventh light splitting sheet 770 faces the first light splitting sheet 710, the other surface of the seventh light splitting sheet 770 faces the fourth light source 40, the converged first wavelength light, the converged second wavelength light and the converged third wavelength light are emitted to one surface of the seventh light splitting sheet 770, and the converged fourth wavelength light is emitted to the other surface of the seventh light splitting sheet 770. Therefore, the four light beams all irradiate the seventh dichroic filter 770, and under the action of the spectral transmission and the spectral reflection of the seventh dichroic filter 770, the four light beams can be effectively converged and combined.
In the above embodiment, the projection optical path includes the first light-emitting end surface 910, the first light-emitting end surface 910 is perpendicular to the emitting direction of the first wavelength light, the second wavelength light, and the third wavelength light are transmitted through the seventh optical splitter 770, the fourth wavelength light is reflected by the seventh optical splitter 770, the first wavelength light, the second wavelength light, the third wavelength light, and the fourth wavelength light are converged by the seventh optical splitter 770, and the converged first wavelength light, the second wavelength light, the third wavelength light, and the fourth wavelength light are emitted from the first light-emitting end surface 910. Antireflection films for the first wavelength light, the second wavelength light and the third wavelength light are disposed on the surface of the seventh dichroic sheet 770 facing the first dichroic sheet 710, and a reflective film for the fourth wavelength light is disposed on the surface of the seventh dichroic sheet 770 facing the fourth light source 40. Therefore, when the seventh dichroic sheet 770 transmits the light with the first wavelength, the light with the second wavelength, and the light with the third wavelength, and reflects the light with the fourth wavelength, the light with the first wavelength, the light with the second wavelength, the light with the third wavelength, and the light with the fourth wavelength can be converged and combined, and then emitted from the first light-emitting end face 910. The antireflection films for the first wavelength light, the second wavelength light and the third wavelength light and the reflection film for the fourth wavelength light are disposed on the same surface of the seventh dichroic plate 770, the antireflection films for the first wavelength light, the second wavelength light and the third wavelength light are disposed near the first light source 10, and the reflection film for the fourth wavelength light is disposed near the fourth light source 40.
In addition, another light emitting direction is provided in this embodiment, the projection light path includes a second light emitting end surface 920, the second light emitting end surface 920 is parallel to the emitting direction of the first wavelength light, the second wavelength light and the third wavelength light are reflected by the seventh dichroic plate 770, the fourth wavelength light is transmitted by the seventh dichroic plate 770, the first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are converged by the seventh dichroic plate 770, and the converged first wavelength light, the second wavelength light, the third wavelength light and the fourth wavelength light are emitted from the second light emitting end surface 920. A reflective film for the first wavelength light, the second wavelength light, and the third wavelength light is disposed on a surface of the seventh dichroic sheet 770 facing the first dichroic sheet 710, and an anti-reflective film for the fourth wavelength light is disposed on a surface of the seventh dichroic sheet 770 facing the fourth light source 40. Therefore, when the seventh dichroic sheet 770 reflects the light with the first wavelength, the light with the second wavelength, and the light with the third wavelength, and transmits the light with the fourth wavelength, the light with the first wavelength, the light with the second wavelength, the light with the third wavelength, and the light with the fourth wavelength can be converged and combined, and then emitted from the second light-emitting end face 920. Similarly, the reflection films for the first wavelength light, the second wavelength light and the third wavelength light and the antireflection film for the fourth wavelength light are disposed on the same surface of the seventh dichroic sheet 770, the reflection films for the first wavelength light, the second wavelength light and the third wavelength light are disposed near the first light source 10, and the antireflection film for the fourth wavelength light is disposed near the fourth light source 40.
Referring again to fig. 8, in order to flexibly adjust the installation position of the projection light path according to the installation space, the second light source 20, the third light source 30, and the fourth light source 40 are disposed at an upper side of the light path from which the first wavelength light exits. Therefore, in the present embodiment, only the space on the side of the light path for emitting the first wavelength light is utilized, and the space on the lower side of the light path for emitting the first wavelength light can be saved.
Referring to fig. 9, in an eighth embodiment of the present invention, based on the seventh embodiment of the present invention, the third light source 30 and the fourth light source 40 are disposed on the upper side of the light path of the first wavelength light, and the second light source 20 is disposed on the lower side of the light path of the first wavelength light opposite to the third light source 30. Therefore, in this embodiment, the space on the light path of the first wavelength light emitted from the second light source 20 can be saved.
Referring to fig. 10, in a ninth embodiment of the present invention, based on the seventh embodiment of the present invention, the second light source 20 and the fourth light source 40 are disposed on the upper side of the light path of the first wavelength light, and the third light source 30 is disposed on the lower side of the light path of the first wavelength light opposite to the second light source 20. Therefore, in this embodiment, the space on the light path of the first wavelength light emitted from the third light source 30 can be saved.
Referring to fig. 11, in a tenth embodiment of the present invention based on the seventh embodiment of the present invention, the second light source 20 and the third light source 30 are disposed on the upper side of the light path of the first wavelength light, and the fourth light source 40 is disposed on the lower side of the light path of the first wavelength light opposite to the second light source 20. Therefore, in this embodiment, the space on the upper side of the light path for emitting the first wavelength light with respect to the fourth light source 40 can be saved.
In addition, in order to improve the light extraction efficiency of the light, the present invention further provides an excitation light source 50, and the excitation light source 50 emits excitation light, for example, the excitation light source 50 is a pump lamp. The excitation light source 50 emits excitation light rays, which are directed to the first light source 10, the second light source 20, or the third light source 30. For example, the light emitting direction of the excitation light source 50 is disposed facing the first light splitting sheet 710. When the first light source 10 is green light, the excitation light is reflected by the first light splitter 710 and emitted to the first light source 10; the excitation light is blue light, and after being reflected by the first light splitter 710, the excitation light of the blue light is emitted to the first light source 10, and then fluorescent molecules of the green light are increased, so that the light output quantity of the green light is increased. Alternatively, the second light source 20 is green light, and the excitation light is transmitted through the first light splitter 710 and emitted to the second light source 20. After the excitation light of the blue light is emitted to the second light source 20 by the transmission of the first light splitter 710, the fluorescent molecules of the green light are increased, and thus the light output amount of the green light is increased. Based on this, referring to fig. 12, an eleventh embodiment of the present invention is proposed based on the first embodiment of the present invention, wherein the second light source 20 and the third light source 30 are disposed on the upper side of the light path of the first wavelength, and the excitation light source 50 is disposed on the lower side of the light path of the first wavelength with respect to the third light source 30. At this time, the emitting directions of the second light source 20 and the third light source 30 are the same, the emitting directions of the excitation light source 50 and the third light source 30 are opposite, and the emitting direction of the fourth light source 40 is perpendicular to the emitting direction of the third light source 30.
Referring to fig. 13, a twelfth embodiment of the present invention is proposed based on the second embodiment of the present invention, and similarly, in order to flexibly adjust the installation position of the projection optical path, the excitation light source 50 and the third light source 30 are disposed on the upper side of the first wavelength light emission optical path, and the second light source 20 is disposed on the lower side of the first wavelength light emission optical path relative to the third light source 30. At this time, the emitting directions of the second light source 20 and the third light source 30 are opposite, the emitting directions of the excitation light source 50 and the third light source 30 are the same, and the emitting direction of the fourth light source 40 is perpendicular to the emitting direction of the third light source 30. In addition, in the case of avoiding the interference between the fourth light source 40 and the fifth light source, the fourth light source 40 and the first light source 10 may be provided on the left side of the third wavelength light emission optical path. The first light source 10 may be provided on the left side of the third wavelength light emission optical path, and the fourth light source 40 may be provided on the right side of the third wavelength light emission optical path.
Referring to fig. 14, according to a fourth embodiment of the present invention, a thirteenth embodiment of the present invention is provided, in which the second light source 20 and the third light source 30 are disposed on an upper side of an exit optical path of the first wavelength light, the excitation light source 50 is disposed on a lower side of the exit optical path of the first wavelength light relative to the third light source 30, and the first light source 10 and the fourth light source 40 are disposed on a left side of the exit optical path of the second wavelength light. Thus, when the second light source 20 is green, the excitation light emitted from the excitation light source 50 is transmitted through the first light splitter 710, the third light splitter 830 and the fourth light splitter 740 in sequence. In addition, when the mounting position of the optical element is flexibly set, the light extraction efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
Referring to fig. 15, according to the fifth embodiment of the present invention, a fourteenth embodiment of the present invention is proposed, in which the second light source 20 and the third light source 30 are disposed on upper and lower sides of the light path of the first wavelength light, the excitation light source 50 and the third light source 30 are disposed on a lower side of the light path of the first wavelength light, and the first light source 10 and the fourth light source 40 are disposed on a left side of the light path of the second wavelength light. Accordingly, when the space on the right side of the emission direction of the fourth light source 40 with respect to the second wavelength light is saved, the light emission efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
Referring to fig. 16, according to a sixth embodiment of the present invention, a fifteenth embodiment of the present invention is provided, in which the second light source 20 and the third light source 30 are disposed on upper and lower sides of the light path of the first wavelength light, the excitation light source 50 and the third light source 30 are disposed on a lower side of the light path of the first wavelength light, and the first light source 10 and the fourth light source 40 are disposed on left and right sides of the light path of the second wavelength light. Accordingly, when the space on the left side of the fourth light source 40 with respect to the emission direction of the second wavelength light is saved, the light emission efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
Referring to fig. 17, according to the seventh embodiment of the present invention, in a sixteenth embodiment of the present invention, the second light source 20, the third light source 30 and the fourth light source 40 are disposed on an upper side of the light path of the first wavelength light, and the excitation light source 50 is disposed on a lower side of the light path of the first wavelength light relative to the third light source 30. Accordingly, when the space below the third light source 30 and the fourth light source 40 with respect to the emitting direction of the first wavelength light is saved, the light emitting efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
Referring to fig. 18, according to the eighth embodiment of the present invention, a seventeenth embodiment of the present invention is proposed, in which an excitation light source 50, a third light source 30 and a fourth light source 40 are disposed on an upper side of an exit optical path of the first wavelength light, and a second light source 20 is disposed on a lower side of the exit optical path of the first wavelength light relative to the third light source 30. Similarly, when the space below the third light source 30 and the fourth light source 40 with respect to the emitting direction of the first wavelength light is saved, the light emitting efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
Referring to fig. 19, according to the ninth embodiment of the present invention, an eighteenth embodiment of the present invention is proposed, in which the second light source 20 and the fourth light source 40 are disposed on the upper side of the light path of the first wavelength light, and the excitation light source 50 and the third light source 30 are disposed on the lower side of the light path of the first wavelength light. Accordingly, when the space above the third light source 30 with respect to the emitting direction of the first wavelength light and the space below the fourth light source 40 with respect to the emitting direction of the first wavelength light are saved, the light emitting efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
Referring to fig. 20, according to the tenth embodiment of the present invention, a nineteenth embodiment of the present invention is proposed, in which the second light source 20 and the third light source 30 are disposed on the upper side of the light path of the first wavelength light, and the excitation light source 50 and the fourth light source 40 are disposed on the lower side of the light path of the first wavelength light. Accordingly, when the space below the third light source 30 with respect to the emitting direction of the first wavelength light and the space above the fourth light source 40 with respect to the emitting direction of the first wavelength light are saved, the light emitting efficiency of the first light source 10 or the second light source 20 can be improved by the excitation light source 50.
The invention also provides projection equipment which comprises a shell and the projection light path as above, wherein the projection light path is arranged on the shell. The casing has installation space, and the projection light path sets up in installation space, and the casing can protect the projection light path, reduces the impaired probability of optical components in the projection light path. Meanwhile, the shell can also prevent dust from falling into the projection light path, so that the influence of the dust on the projection light path is reduced. In addition, the shell can also be waterproof, liquid such as rainwater or sweat is reduced to permeate into the projection light path, and corrosion of the liquid to optical components in the projection light path is avoided.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications and equivalents of the present invention, which are made by the contents of the present specification and the accompanying drawings, or directly/indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A projection light path, comprising:
a first light source emitting light of a first wavelength;
the second light source emits second-wavelength light, and the first-wavelength light and the second-wavelength light are converged;
a third light source, configured to emit a third wavelength light, where the third wavelength light is emitted toward the converged first wavelength light and the converged second wavelength light, colors of the first wavelength light, the converged second wavelength light, and the third wavelength light are different, and the first wavelength light, the converged second wavelength light, and the converged third wavelength light are red light, green light, and blue light, respectively; and
a fourth light source configured to emit a fourth wavelength light, the fourth wavelength light being converged with the first wavelength light, the second wavelength light, and the third wavelength light, a wavelength range of the fourth wavelength light being within a wavelength range of red light, where a wavelength of the fourth wavelength light is defined as λ 1, and a wavelength of red light set among the first wavelength light, the second wavelength light, and the third wavelength light is defined as λ 2, where: λ 1 ≠ λ 2.
2. The projection optical path of claim 1, wherein the projection optical path comprises a plurality of collimator sets, and the collimator sets are disposed in a light-emitting direction of at least one of the first light source, the second light source, the third light source, or the fourth light source.
3. The projection optical path of claim 2, wherein the set of collimating lenses comprises a first collimating lens disposed facing the corresponding light source and a second collimating lens disposed facing away from the corresponding light source;
the first collimating lens and the second collimating lens are any one of a spherical lens, an aspherical lens or a free-form surface lens.
4. The projection optical path according to claim 1, wherein the projection optical path includes a first light splitter disposed in an optical path in an exit direction of the light with the first wavelength and the light with the second wavelength, the first light splitter has a first surface facing the first light source and a second surface facing the second light source, the first surface or the second surface is provided with an antireflection film for reflecting the light with the first wavelength, and the first surface or the second surface is provided with a reflection film for reflecting the light with the second wavelength.
5. The projection optical path of claim 1, further comprising a first condenser lens disposed in an optical path in which the first wavelength light and the second wavelength light converge.
6. The projection optical path of claim 5, wherein the first collection mirror has a convex surface disposed on a side of the first collection mirror facing away from the first light source.
7. The projection optical path of claim 5, wherein the first condenser lens is made of one of glass and plastic.
8. The projection light path of any of claims 1 to 6, wherein the fourth wavelength light has a wavelength λ 1 that is greater than a wavelength λ 2.
9. The projection light path of any of claims 1-6, comprising an excitation light source that emits excitation light rays directed to the first light source, the second light source, or the third light source.
10. A projection device, characterized in that the projection device comprises a housing and a projection light path according to any of claims 1 to 9, which projection light path is provided in the housing.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276057.6A CN112305845A (en) | 2020-11-13 | 2020-11-13 | Projection light path and projection equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011276057.6A CN112305845A (en) | 2020-11-13 | 2020-11-13 | Projection light path and projection equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN112305845A true CN112305845A (en) | 2021-02-02 |
Family
ID=74334483
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202011276057.6A Pending CN112305845A (en) | 2020-11-13 | 2020-11-13 | Projection light path and projection equipment |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN112305845A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022100097A1 (en) * | 2020-11-13 | 2022-05-19 | 歌尔股份有限公司 | Projection optical path and projection device |
| TWI803040B (en) * | 2021-10-29 | 2023-05-21 | 佳世達科技股份有限公司 | Light source module |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101246301A (en) * | 2007-02-12 | 2008-08-20 | 财团法人工业技术研究院 | Projection device |
| CN101779473A (en) * | 2006-12-13 | 2010-07-14 | 皇家飞利浦电子股份有限公司 | Multi-color primary light generation in a projection system using leds |
| CN102385230A (en) * | 2010-08-30 | 2012-03-21 | 台达电子工业股份有限公司 | Light source system and projection device including light source system |
| CN103529630A (en) * | 2012-07-05 | 2014-01-22 | 株式会社理光 | Light source apparatus and image projection apparatus |
| DE102013216896A1 (en) * | 2013-08-26 | 2015-02-26 | Robert Bosch Gmbh | Light source device, in particular for use in a micromirror device |
| CN207352345U (en) * | 2017-05-17 | 2018-05-11 | 广景视睿科技（深圳）有限公司 | It is a kind of to strengthen bright projection light source and its optical projection system |
| CN108255008A (en) * | 2018-01-24 | 2018-07-06 | 杭州昌松光学有限公司 | A kind of multi-wavelength multiplex projecting apparatus RGB closes color device |
| CN207992666U (en) * | 2018-03-23 | 2018-10-19 | 杭州有人光电技术有限公司 | A kind of projecting illumination system of LED and laser light source composition |
| CN208537895U (en) * | 2018-07-05 | 2019-02-22 | 深圳市点睛创视技术有限公司 | A kind of micro projector ray machine illumination stage |
| CN113031292A (en) * | 2019-12-24 | 2021-06-25 | 翟金会 | Multi-channel high-brightness optical engine equipment |
-
2020
- 2020-11-13 CN CN202011276057.6A patent/CN112305845A/en active Pending
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101779473A (en) * | 2006-12-13 | 2010-07-14 | 皇家飞利浦电子股份有限公司 | Multi-color primary light generation in a projection system using leds |
| CN101246301A (en) * | 2007-02-12 | 2008-08-20 | 财团法人工业技术研究院 | Projection device |
| CN102385230A (en) * | 2010-08-30 | 2012-03-21 | 台达电子工业股份有限公司 | Light source system and projection device including light source system |
| CN103529630A (en) * | 2012-07-05 | 2014-01-22 | 株式会社理光 | Light source apparatus and image projection apparatus |
| DE102013216896A1 (en) * | 2013-08-26 | 2015-02-26 | Robert Bosch Gmbh | Light source device, in particular for use in a micromirror device |
| CN207352345U (en) * | 2017-05-17 | 2018-05-11 | 广景视睿科技（深圳）有限公司 | It is a kind of to strengthen bright projection light source and its optical projection system |
| CN108255008A (en) * | 2018-01-24 | 2018-07-06 | 杭州昌松光学有限公司 | A kind of multi-wavelength multiplex projecting apparatus RGB closes color device |
| CN207992666U (en) * | 2018-03-23 | 2018-10-19 | 杭州有人光电技术有限公司 | A kind of projecting illumination system of LED and laser light source composition |
| CN208537895U (en) * | 2018-07-05 | 2019-02-22 | 深圳市点睛创视技术有限公司 | A kind of micro projector ray machine illumination stage |
| CN113031292A (en) * | 2019-12-24 | 2021-06-25 | 翟金会 | Multi-channel high-brightness optical engine equipment |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022100097A1 (en) * | 2020-11-13 | 2022-05-19 | 歌尔股份有限公司 | Projection optical path and projection device |
| TWI803040B (en) * | 2021-10-29 | 2023-05-21 | 佳世達科技股份有限公司 | Light source module |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN112305845A (en) | Projection light path and projection equipment | |
| US7993046B2 (en) | Flexible light-emitting apparatus | |
| CN213457629U (en) | Projection light path and projection equipment | |
| EP3255687B1 (en) | Light emitting device | |
| CN214375784U (en) | Projection light path and projection equipment | |
| JP4768160B2 (en) | Light output device, pointer and image projection device | |
| CN213690207U (en) | Projection light path and projection equipment | |
| US10649324B2 (en) | Illumination device and projector | |
| US20210180771A1 (en) | Lamp | |
| KR20180086225A (en) | Head-up display device and production method thereof | |
| CN216979567U (en) | Illumination system and projection apparatus | |
| CN216979566U (en) | Illumination system and projection apparatus | |
| CN213457628U (en) | Projection light path and projection equipment | |
| CN214504020U (en) | Optical system and augmented reality device | |
| CN216979564U (en) | Illumination system and projection apparatus | |
| CN212780470U (en) | High-brightness low-cost light path structure based on DLP technology and used for AOI detection field | |
| CN216979565U (en) | Illumination system and projection apparatus | |
| CN213423691U (en) | Projection light path and projection equipment | |
| CN214375785U (en) | Projection light path and projection equipment | |
| CN215526338U (en) | Light source light combining system, projection lighting system and projection equipment | |
| CN213341080U (en) | Semiconductor laser | |
| CN213341081U (en) | Semiconductor laser | |
| CN107991741B (en) | Laser optical fiber coupling lens group | |
| CN217281607U (en) | Laser light source system | |
| CN116224703B (en) | Projection optical engine structure, projection device and wearable equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20210202 |