CN118210190A - Projector with a light source - Google Patents

Abstract

The application provides a projector, which comprises a refraction device, a projection lens and a light modulator, wherein the refraction device is positioned between the projection lens and the light modulator, the light modulator is configured to modulate light reflected into the refraction device into projection light and non-projection light, the refraction device comprises a light refraction component, and a refraction part is arranged along the edge of a light emergent surface of the light refraction component; the refraction part comprises an incident surface and an emergent surface, wherein the incident surface and the emergent surface form a preset angle, and the incident surface is arranged on one surface of the refraction part, which is close to the light modulator. The application avoids the incidence of the non-projection light rays emitted by the refraction device into the projection lens, does not form stray light in the projection lens due to the non-projection light rays, ensures the contrast of a projection picture, improves the imaging quality, and simultaneously collects the non-projection light rays to realize better treatment and utilization.

Description

Projector with a light source

Technical Field

The application relates to the technical field of projection, in particular to a projector.

Background

The projector, also called projector, is a device capable of projecting images or videos onto a curtain, and can play corresponding video signals by being connected with computers, VCD, DVD, BD, game machines, DV and the like through different interfaces, so that the projector is widely applied to areas such as families, offices, schools, entertainment venues and the like.

When the projector works, the light source emits light to the light shaping system, the shaped light is incident into the refraction device at a certain angle, when passing through the interface inside the refraction device, the light is totally reflected to the light modulator, the light is modulated by the light modulator, the light is modulated into projection light (useful light) and non-projection light (non-useful light), the projection light is transmitted through the refraction device and then is incident into the projection lens to be imaged, after being refracted by the refraction device, part of the non-projection light is also incident into the projection lens, the non-projection light incident into the projection lens forms stray light, the contrast of a projection picture is reduced, the imaging quality is influenced, the damage of components such as the projection lens is caused, and the appearance of the projector is influenced.

In view of the above, the present application proposes a new projector to solve at least partially the above problems.

Disclosure of Invention

In the summary, a series of concepts in a simplified form are introduced, which will be further described in detail in the detailed description. The summary of the invention is not intended to define the key features and essential features of the claimed subject matter, nor is it intended to be used as an aid in determining the scope of the claimed subject matter.

In one aspect, the present application provides a projector, including a refraction device, a projection lens, and a light modulator, where the refraction device is located between the projection lens and the light modulator, and the light modulator is configured to modulate light reflected into the refraction device into projected light and non-projected light, and the refraction device includes a light refraction component, and a refraction part is disposed along an edge of a light exit surface of the light refraction component; the refraction part comprises an incident surface and an emergent surface, wherein the incident surface and the emergent surface form a preset angle, and the incident surface is arranged on one surface of the refraction part, which is close to the light modulator.

In one example, the refractive index of the refractive portion is equal to or less than the refractive index of the light refractive component.

In one example, the predetermined angle satisfies the following condition:

α<θ-arccos(1/N)

Wherein α is the predetermined angle, N is the refractive index of the refractive portion, and θ is the angle between the non-projection light reflected by the light modulator into the light refractive component and the light exit surface of the light refractive component.

In one example, the refractive portion is located outside an area illuminated by projection light reflected into the light refracting assembly by the light modulator.

In one example, the refractive portion is a prism or a lens, wherein the prism includes a plurality of prism units, and the lens includes a fresnel lens.

In one example, the light refraction component includes a first prism and a second prism that are disposed in a fitting manner, the refraction portion is disposed at an edge position of the light emitting surface of the second prism, and the refraction portion and the second prism are integrally formed.

In one example, the refraction portion is configured to refract the non-projection light to an area other than the projection lens.

In one example, the projector further includes a light shaping device for shaping the non-projection light rays emitted from the refraction device, and a light collecting device for collecting the non-projection light rays shaped by the light shaping device.

In one example, the light collection device includes a light absorbing assembly configured to absorb non-projection light collected by the light collection device; an optical window is arranged between the light absorption component and the light shaping device; the optical window is configured to spatially isolate the light absorbing assembly from the light shaping device and to transmit non-projection light rays shaped by the light shaping device to the light absorbing assembly; the light collecting device further comprises a heat radiating part, wherein the heat radiating part is arranged outside the projector and is used for radiating heat outwards.

In one example, the light collection device includes a light output assembly configured to output non-projected light collected by the light collection device.

In one example, the light output assembly includes a light guiding element and an output terminal connected to each other, wherein the light collecting device is configured to guide non-projection light rays incident therein to the light guiding element, and the light guiding element is configured to transmit the non-projection light rays therein to the output terminal so that the output terminal outputs the non-projection light rays.

In one example, the output terminal is an interface configured to be connected to a display device, so as to output the non-projection light transmitted into the light guide element to the display device for display; or the output terminal is an indicator configured to be capable of presenting non-projected light rays transmitted into it by the light guide element.

According to the projector provided by the embodiment of the application, the refraction device comprising the refraction part is arranged, and the incident surface and the emergent surface of the refraction part form a certain angle, so that the refraction part can refract the non-projection light rays reflected into the refraction device by the light modulator to the area outside the projection lens, the non-projection light rays emergent from the refraction device are prevented from being incident into the projection lens, stray light is not formed in the projection lens due to the non-projection light rays, and the contrast of a projection picture is ensured, and the imaging quality is improved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort to a person skilled in the art.

In the drawings:

FIG. 1 shows a schematic diagram of the operation of a projector;

FIG. 2 illustrates another operational schematic of a projector;

FIG. 3A shows a schematic structural view of a refractive device according to an embodiment of the present application;

FIG. 3B shows a schematic view of a refractive device refracting light according to one embodiment of the application;

FIG. 3C shows a schematic diagram of the structure of a refractive portion according to one embodiment of the present application;

FIG. 4A is a schematic diagram showing the structure of a refractive device according to another embodiment of the present application;

FIG. 4B is a schematic view of a refractive device according to another embodiment of the present application;

FIG. 5 is a schematic view showing the structure of a refraction device according to another embodiment of the present application;

FIG. 6 is a schematic view showing the structure of a refractive device according to another embodiment of the present application;

FIG. 7 illustrates another operational schematic of a projector;

FIG. 8 shows a block diagram of a projector according to one embodiment of the application;

FIG. 9A shows a schematic diagram of a light collection device collecting non-projected light rays according to one embodiment of the present application;

FIG. 9B is a schematic diagram of a light collection device collecting non-projected light according to another embodiment of the present application;

FIG. 10A shows a schematic diagram of a light output device outputting non-projected light according to one embodiment of the present application;

FIG. 10B is a schematic diagram of a light output device outputting non-projected light according to another embodiment of the present application;

FIG. 10C is a schematic diagram of a light output device outputting non-projected light according to another embodiment of the present application.

Detailed Description

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present application. It will be apparent, however, to one skilled in the art that the application may be practiced without one or more of these details. In other instances, well-known features have not been described in detail in order to avoid obscuring the application.

It should be understood that the present application may be embodied in various forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the application to those skilled in the art. In the drawings, the size of layers and regions, as well as the relative sizes, may be exaggerated for clarity. Like numbers refer to like elements throughout.

It will be understood that when an element or layer is referred to as being "on," "adjacent," "connected to," or "coupled to" another element or layer, it can be directly on, adjacent, connected, or coupled to the other element or layer, or intervening elements or layers may be present. In contrast, when an element is referred to as being "directly on," "directly adjacent to," "directly connected to," or "directly coupled to" another element or layer, there are no intervening elements or layers present. It will be understood that, although the terms first, second, third, etc. may be used herein to describe various elements, components, regions, layers and/or sections, these elements, components, regions, layers and/or sections should not be limited by these terms. These terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, a first element, component, region, layer or section discussed below could be termed a second element, component, region, layer or section without departing from the teachings of the present application.

Spatially relative terms, such as "under," "below," "beneath," "under," "above," "over," and the like, may be used herein for ease of description to describe one element or feature's relationship to another element or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use and operation in addition to the orientation depicted in the figures. For example, if the device in the figures is turned over, elements or features described as "under" or "beneath" other elements would then be oriented "on" the other elements or features. Thus, the exemplary terms "below" and "under" may include both an upper and a lower orientation. The device may be otherwise oriented (rotated 90 degrees or other orientations) and the spatially relative descriptors used herein interpreted accordingly.

In the related art, in operation of the projector with reference to fig. 1, a light 110 is emitted from a light source, the light 110 is incident into a refraction device 220 at a predetermined angle, the refraction device 220 includes a first prism 221 and a second prism 222, the light 110 is totally reflected to a light modulator 230 when passing through an interface between the first prism 221 and the second prism 222, the light 110 is modulated by the light modulator 230 to be modulated into a projected light 111 and a non-projected light 112, and the projected light 111 is transmitted through the refraction device 220 and then is incident into a projection lens 210 for imaging. The projection light 111 is image light, and is used for projecting light forming a screen. Whereas non-projection light rays 112 are other light rays than projection light rays.

In connection with fig. 2, projected light rays 121 are shown in solid line boxes and non-projected light rays 122 are shown in dashed line boxes. Since the shaped light is a light beam with a predetermined angle, the projected light 121 is transmitted by the refraction device 220 and then is incident into the projection lens 210 for imaging, and after the non-projected light 122 is refracted by the refraction device 220, part of the non-projected light 122 is incident into the projection lens 210 (as shown in a region a in the figure), and the non-projected light 122 incident into the projection lens 210 forms stray light, which causes a reduction in contrast of a projection image and affects imaging quality.

In order to solve the above-described problems, in the present application, there is provided a projector including a refractive device projection lens and a light modulator, the refractive device being located between the projection lens and the light modulator, the light modulator being configured to modulate light reflected into the refractive device into projected light and non-projected light, the refractive device including a light refractive element, a refractive portion being provided along an edge of a light exit surface of the light refractive element; the refraction part comprises an incident surface and an emergent surface, wherein the incident surface and the emergent surface form a preset angle, and the incident surface is arranged on one surface of the refraction part, which is close to the light modulator.

According to the projector, the refraction device comprising the refraction part is arranged, and the incident surface and the emergent surface of the refraction part form a certain angle, so that the refraction part can refract the non-projection light rays reflected into the refraction device by the light modulator to the area outside the projection lens, the non-projection light rays emitted by the refraction device are prevented from being incident into the projection lens, stray light is not formed in the projection lens due to the non-projection light rays, and the contrast of a projection picture is ensured, and the imaging quality is improved.

In order to provide a thorough understanding of the present application, detailed structures will be presented in the following description in order to illustrate the technical solutions presented by the present application. Preferred embodiments of the present application are described in detail below, however, the present application may have other embodiments in addition to these detailed descriptions.

The following describes a refractive device 340 according to an embodiment of the present application with reference to fig. 3A and 3B. Wherein FIG. 3A illustrates a refractive device 340 according to one embodiment of the present application; fig. 3B shows a schematic view of a refractive device 340 refracting light according to one embodiment of the application. As shown in fig. 3A and 3B, the refraction device 340 is used for a projector, the projector is provided with a projection lens 350 and a light modulator 330, the refraction device 340 is positioned between the projection lens 350 and the light modulator 330, the refraction device 340 comprises a light refraction component 341, the edge position of the surface of the light refraction component 341 facing the projection lens 350 is provided with a refraction part 342, and at least part of the refraction part 342 projects beyond the projection lens 350 along the axial direction of the projection lens 350; wherein the light refracting element 341 is configured to direct light incident on the light refracting element 341 to the light modulator 330, and to direct projection light 131 reflected by the light modulator 330 into the light refracting element 342 to the projection lens 350, and to direct non-projection light 132 reflected by the light modulator 330 into the light refracting element 341 to the refractive portion 342; the refraction portion 342 is configured to collect the non-projection light 132 guided to the refraction portion 342 by the light refraction element 341, and to refract the collected non-projection light 132 to an area other than the projection lens 350.

Based on the refraction device 340, the light refraction component 341 guides the light incident on the light refraction component 341 to the light modulator 330, the light modulator 330 modulates the light into the projection light 131 and the non-projection light 132 and reflects the projection light 131 into the refraction device 340, the projection light 131 reflected into the refraction device 340 by the light modulator 330 is guided into the projection lens 350 through the light refraction component 341 to image, the non-projection light 132 reflected into the refraction device 340 by the light modulator 330 is guided into the refraction part 342 through the light refraction component 341, and the non-projection light 132 is refracted to the area outside the projection lens 350 through the refraction part 342, so that the incidence of the non-projection light 132 emitted by the refraction device 340 into the projection lens 350 is avoided, stray light is not formed in the projection lens 350 due to the non-projection light 132, the contrast of a projection picture is ensured, and the imaging quality is improved.

In the embodiment of the present application, the projector used by the refraction device 340 may be a digital light Processing (DIGITAL LIGHT Processing, DLP for short), an LCoS (liquid crystal on silicon) projector, a Liquid CRYSTAL DISPLAY (LCD) projector, a 3LCD projector, etc., which is not limited thereto.

In the embodiment of the present application, the refraction portion 342 is located outside the area irradiated by the projection light 131, and the refraction portion 342 is located inside at least a part of the area irradiated by the non-projection light 132. Specifically, the projection light ray 131 reflected by the light modulator 330 into the refraction device 340 is guided by the light refraction component 341 and then enters the projection lens 350, but does not enter the refraction portion 342, and the non-projection light ray 132 reflected by the light modulator 330 into the refraction device 340 is guided by the light refraction component 341 and then enters the refraction portion 342, and is refracted by the refraction portion 342 to an area outside the projection lens 350.

In an embodiment of the present application, as shown in fig. 3A and 3B, the light refraction component 341 includes a first prism 3411 and a second prism 3412 that are disposed in a fitting manner, and the refraction portion 342 is disposed on a part of a surface of the second prism 3412 facing the projection lens 650. Specifically, as shown in fig. 3B, the first prism 3411 is configured to emit the projected light 131 and the non-projected light 132 reflected therein by the light modulator 630 to the second prism 3412; the second prism 3412 is configured to guide the projection light ray 131 emitted from the first prism 3411 into the projection lens 650, and guide the non-projection light ray 133 emitted from the first prism 3411 into the refraction portion 342; the refractive portion 342 is configured to refract the non-projection light 163 guided thereto by the second prism 3412 to an area other than the projection lens 650.

In an embodiment of the present application, the first prism 3411 may be a triangular prism, the second prism 3412 may be a triangular prism, and the refractive portion 342 may be a triangular prism.

In an embodiment of the present application, as shown in fig. 3C, the refraction portion 342 may be a prism, where the prism includes a light-emitting surface 3422 and a light-entering surface 3421, the light-emitting surface 3422 faces the projection lens 650, and an included angle between the light-entering surface 3421 and the light-emitting surface 3422 is an acute angle. In the figure, the included angle between the light incident surface 3421 and the light emergent surface 3422 is an angle a, and the angle a is an acute angle. The magnitude of the acute angle may be determined according to the actual situation, and is not limited herein. The refraction portion 342 is disposed on the light refraction component 341, and the light incident surface 3421 of the refraction portion 342 is attached to the surface of the light refraction component 341 facing the projection lens 650, where the refraction portion 342 and the light refraction component 341 form the refraction device 340. The non-projection light emitted from the light refraction element 341 enters the refraction portion 342 through the light incident surface 3421, and the non-projection light is refracted to the area outside the projection lens 650 when the non-projection light is emitted from the light incident surface 3422 due to the acute angle between the light incident surface 3421 and the light emergent surface 3422.

Fig. 4A shows a refractive device 440 according to another embodiment of the application, which is another implementation of the refractive device. As shown in fig. 4A, the refraction device 440 includes a first prism 441 and a combined prism 442, which are disposed in a fitting manner, the first prism 441 may be the first prism 3411, and the combined prism 442 may be formed by integrally molding the second prism 3412 and the refraction portion 342. Specifically, as shown in fig. 4B, the first prism 441 is configured to emit the projected light 141 and the non-projected light 142 reflected therein by the light modulator 430 to the combining prism 442; the combining prism 442 is configured to output the projection light 141 of the first prism 441 to the projection lens 450, and output the non-projection light 142 of the first prism 441 to the area outside the projection lens 450.

In an embodiment of the present application, the first prism 441 may be a triangular prism, and the combined prism 442 may be a quadrangular prism integrally formed with two triangular prisms.

Fig. 5 shows a refractive device 540 according to another embodiment of the application, which is another implementation of the refractive device. As shown in fig. 5, the refraction device 540 includes a light refraction component 541 and a refraction portion 542 that are disposed in a fitting manner, where the refraction portion 542 may be a lens. Specifically, the light refracting element 541 is configured to emit the projection light reflected therein by the light modulator to the projection lens, emit the non-projection light reflected therein by the light modulator to the refracting part 542, and the refracting part 542 can emit the non-projection light emitted therein by the light refracting element 541 to an area other than the projection lens by the refracting action (or referred to as focusing action) of the lens.

In one example, refractive portion 542 may be an incomplete convex lens. The incomplete convex lens may be a semi-circular convex lens, a convex lens smaller than a semi-circle, a convex lens larger than a semi-circle, or the like.

In another example, the refraction portion 542 may include a fresnel lens that refracts the non-projection light rays through concentric circular patterns in the fresnel lens to exit the non-projection light rays to an area other than the projection lens.

In the embodiment of the present application, the refraction portion 542 includes a light emitting surface and a light entering surface, the light emitting surface of the refraction portion 542 faces the projection lens, the light emitting surface is an arc surface, the light entering surface is attached to a portion of the surface of the light refraction component 541 facing the projection lens, and an included angle between a tangent line at any point on the arc surface and the light entering surface is an acute angle. The non-projection light emitted from the light refracting component 541 enters the refracting part 542 through the light incident surface, and is refracted to a region other than the projection lens when the non-projection light exits through the light incident surface because the included angle between the tangent line at any point on the light incident surface and the light incident surface is an acute angle.

In the embodiment of the present application, as shown in fig. 5, the light refracting component 541 includes a first prism 5411 and a second prism 5412 that are disposed in a fitting manner, and the refracting part 542 disposes a portion of the surface of the second prism 5412 facing the projection lens. For the description of the first prism 5411 and the second prism 5412, reference is made to the above, and no further description is given here. Further, the refractive portion 542 may be integrally formed with the second prism 5412.

Fig. 6 shows a refractive device 640 according to another embodiment of the application, which is another implementation of the refractive device. As shown in fig. 6, the refraction device 640 includes a light refraction assembly 641 and a refraction portion 642 which are disposed in a fitting manner, wherein the refraction portion 642 includes a plurality of prism units. Specifically, the light refracting element 641 is configured to emit the projection light reflected into the light modulator to the projection lens, emit the non-projection light reflected into the light modulator to the refracting part 642, and the plurality of prism units in the refracting part 642 can emit the non-projection light emitted into the light refracting element 641 to an area other than the projection lens.

In the embodiment of the present application, the plurality of prism units are disposed on at least a portion of the surface of the light refracting element 641 facing the projection lens, and may be arranged at intervals in a step shape, so that the refraction portion 642 is in a step shape, thereby avoiding physical interference between the refraction device 640 and the projection lens.

In the embodiment of the present application, the prism unit may be a micro prism, and the refraction portion 642 is formed by a plurality of micro prisms arranged at intervals in a step shape, wherein the refraction portion 642 may be similar to a fresnel lens in shape, and the purpose of reducing the volume is achieved under the condition of realizing the same functions as above.

In an embodiment of the present application, each prism unit includes a light-emitting surface and a light-entering surface, the light-emitting surface faces the projection lens, and an included angle between the light-entering surface and the light-emitting surface is an acute angle. For any prism unit, the non-projection light emitted by the light refracting component 641 enters the corresponding prism unit through the light incident surface, and is refracted to the area outside the projection lens when the non-projection light is emitted through the light incident surface because the included angle between the light emergent surface and the light incident surface is an acute angle.

In the embodiment of the application, the prism units can also have different heights, or have the same height partially, and have different heights partially, and can be reasonably selected according to actual needs.

In the embodiment of the present application, as shown in fig. 6, the light refracting assembly 641 includes a first prism 6411 and a second prism 6412 that are disposed in contact, and the refracting part 642 is disposed on a part of the surface of the second prism 6412 facing the projection lens. The description of the first prism 6411 and the second prism 6412 may be referred to above, and will not be repeated here. Further, the refraction portion 642 may be integrally formed with the second prism 6412.

The application also provides a projector. The projector comprises a refraction device, a light modulator and a projection lens, wherein the refraction device is positioned between the projection lens and the light modulator, the light modulator is configured to modulate light reflected into the refraction device into projection light and non-projection light, the refraction device comprises a light refraction component, and a refraction part is arranged along the edge of a light emergent surface of the light refraction component; the refraction part comprises an incident surface and an emergent surface, wherein the incident surface and the emergent surface form a preset angle, and the incident surface is arranged on one surface of the refraction part, which is close to the light modulator.

The projector may be a Digital Light Processing (DLP) projector (DIGITAL LIGHT), an LCoS (liquid crystal on silicon) projector, a Liquid CRYSTAL DISPLAY (LCD) projector, a 3LCD projector, or the like, which is not limited thereto. The refraction means may be implemented as the refraction means 340, 440, 540, 640 described above, and reference may be made to the above description, which is not repeated here.

Based on the projector, through setting up the refracting device that includes refracting part, through making the incident plane and the emergent plane of refracting part become certain angle, refracting part can be with the light modulator 240 reflection go into the non-projection light refraction of refracting device in to the region beyond the projection lens, avoided in the projection lens is incident to the non-projection light that goes out through refracting device, can not form the stray light in the projection lens because of non-projection light to guaranteed the contrast of projection picture, improved the imaging quality.

In an embodiment of the present application, the refractive index of the refractive portion is less than or equal to the refractive index of the light refractive component. When the refractive index of the refractive part is the same as that of the light refractive component, the refractive part and the light refractive component can be prepared from the same material or can also be prepared from different materials with the same refractive index. When the refractive index of the refractive part is different from that of the light refractive component, the refractive part and the light refractive component are made of different materials.

In an embodiment of the present application, the predetermined angle satisfies the following condition:

α<θ-arccos(1/N)

wherein alpha is a preset angle, N is the refractive index of the refraction part, and theta is the included angle between the non-projection light reflected into the light refraction component by the light modulator and the light emergent surface of the light refraction component.

In an embodiment of the present application, the refraction portion is located outside an area irradiated by the projection light reflected into the light refraction component by the light modulator, and optionally, an incident surface of the refraction portion covers the non-projection light emitted from the light refraction component, so as to guide the non-projection light out of the projection lens optical system. Specifically, the refraction portion is located outside the area illuminated by the projection light reflected by the light modulator into the light refraction assembly, so that the projection light cannot be incident into the refraction portion, the incident surface of the refraction portion covers the non-projection light emitted from the light refraction assembly, all the non-projection light can be incident into the refraction portion, and the situation that the missing non-projection light is incident into the projection lens is avoided. Illustratively, in fig. 3B, the incident surface of the refractive portion 342 covers the non-projection light ray 132 exiting the light refractive element 341, and in fig. 4B, the incident surface of the refractive portion covers the non-projection light ray 142 exiting the light refractive element.

In the related art, referring to fig. 7, a light ray 170 emitted by a light source is modulated by a light modulator 730 and is divided into a projection light ray 171 and a non-projection light ray 172, wherein the projection light ray 171 is guided by a refraction device and can be incident into a projection lens to perform imaging, and the non-projection light ray 172 is refracted by the refraction device to a region outside the projection lens, on one hand, the non-projection light ray 172 refracted to the region outside the projection lens forms stray light in a cavity 760 of the projector, the stray light is absorbed by the cavity 760 to raise the temperature of the cavity 760, and a burden is created on the heat dissipation of the projector, on the other hand, a part of the non-projection light ray 172 refracted to the region outside the projection lens generates volatile matters due to concentrated irradiation to a local position in the cavity 760, and the generated volatile matters pollute optical elements in the cavity 760 of the projector.

In view of this, the present application provides a projector. As shown in fig. 8, the projector 800 includes a refraction device 810, a light shaping device 820, a light collecting device 830, a light modulator 840 and a projection lens 850, wherein the light shaping device 820 is used for shaping the non-projection light emitted by the refraction device 810, and the light collecting device 830 is used for collecting the non-projection light shaped by the light shaping device 820.

The projector 800 may be a Digital Light Processing (DLP) projector, an LCoS (liquid crystal on silicon) projector, a Liquid CRYSTAL DISPLAY (LCD) projector, a 3LCD projector, or the like, which is not limited thereto. Refractive device 810 may be implemented as refractive devices 340, 440, 540, 640 as described above, and reference may be made to the above description, which is not repeated here.

Based on the projector 800, after the light emitted by the light source reaches the light modulator, the light is modulated into projection light and non-projection light by the light modulator, wherein the projection light modulated by the light modulator is guided by the refraction device 810 and then is incident into the projection lens to be imaged, the non-projection light modulated by the light modulator is refracted to a region outside the projection lens by the refraction device 810, the non-projection light is shaped by the light shaping device 820, the shaped non-projection light is incident into the light collecting device 830, and the non-projection light is collected by the light collecting device 830, so that on one hand, stray light is prevented from being formed in the cavity of the projector 800, the temperature of the cavity of the projector 800 is not increased, on the other hand, volatile matters are prevented from being generated at the local position where the non-projection light is intensively irradiated into the cavity, and pollution to optical elements in the cavity is avoided.

In an embodiment of the present application, referring to fig. 9A and 9B, the light collecting device 830 includes a light absorbing component 832 configured to absorb the non-projection light rays 181 collected by the light collecting device 830, and an optical window 831 is provided between the light absorbing component 832 and the light shaping device 820; the optical window 831 is configured to spatially isolate the light absorbing component 832 from the light shaping device 820, and to transmit the non-projection light ray 181 shaped by the light shaping device 820 to the light absorbing component 832, and the light collecting device 830 further includes a heat dissipation portion 833, where the heat dissipation portion 833 is disposed outside the projector, and is configured to dissipate heat to the outside. Specifically, the non-projection light ray 181 is shaped by the light shaping device 820, the shaped non-projection light ray 181 is projected into the light absorbing component 832 from the optical window 831, the non-projection light ray 181 is absorbed by the light absorbing component 832, the temperature of the light absorbing component 832 is raised after the non-projection light ray 181 is absorbed, and the heat of the light absorbing component 832 is dispersed to the outside of the projector by the heat dissipating part 833, so that the non-projection light ray 181 is effectively collected by the light collecting device 830, and the heat dissipating burden of the non-projection light ray 181 on the light collecting device 830 can be avoided.

In an embodiment of the present application, the light shaping device 820 may include optical elements such as lenses, reflective cups, prisms, etc., and the light shaping device 820 may be a convex lens, as illustrated in fig. 9B, for example.

In an embodiment of the present application, in conjunction with fig. 9B, the light absorbing assembly 832 includes a housing 8321 and a light absorbing portion 8322 disposed within the housing 8321, wherein the housing 8321 is configured to collect the non-projection light rays 181 directed therein by the optical window 831, and the light absorbing portion 8322 is configured to absorb the non-projection light rays 181 within the housing 8321. Specifically, the housing 8321 serves as a sealed collection device, and the non-projection light 181 is sealed and collected after being incident into the housing 8321, so that the non-projection light 181 is prevented from escaping, and the non-projection light 1001 thus sealed and collected is further absorbed by the light absorbing portion 8322. The light absorbing portion 8322 may be made of a light absorbing material. The shape of the housing 8321 may be any suitable shape such as a sphere, a truncated cone, or a rectangular parallelepiped, and is not limited thereto. Accordingly, the shape of the light absorbing component 832 is not limited to the planar shape shown in the drawings, and may be any other suitable shape such as concave or convex.

In the related art, light emitted by a light source is modulated by a light modulator and then is divided into projection light and non-projection light, wherein the projection light can be incident into a projection lens for imaging after being guided by a refraction device, and the non-projection light is refracted into a light collecting device by the refraction device to be absorbed and radiated to the outside of the projector in a thermal mode.

In view of this, the present application provides a projector. The projector includes the refraction device, and the projector still includes light shaping device and light collecting device, and light shaping device is used for carrying out the plastic to the non-projection light of refraction device outgoing, and light collecting device is used for collecting the non-projection light after the plastic of light shaping device, and wherein, light collecting device includes light output subassembly, and light output subassembly is configured to carry out the output to the non-projection light that light collecting device collected.

The projector may be a Digital Light Processing (DLP) projector (DIGITAL LIGHT), an LCoS (liquid crystal on silicon) projector, a Liquid CRYSTAL DISPLAY (LCD) projector, a 3LCD projector, or the like, which is not limited thereto. The refraction means may be implemented as the refraction means 340, 440, 540, 640 described above, the light shaping means may be implemented as the light shaping means 820 described above, and the light collecting means may be implemented as the light collecting means 830 described above, and reference may be made to the above description, which is not repeated here.

Based on the projector, after light that the light source sent reaches the light modulator, become projection light and non-projection light by the light modulator modulation, wherein, the projection light that obtains through the light modulator modulation is incident to the projection lens after refracting the device guide, in order to image, the non-projection light that obtains through the light modulator modulation is refracted to the region beyond the projection lens through refracting the device, reshape this part non-projection light through light shaping device, the non-projection light after the plastic is incident in the light collecting device, export the non-projection light that gathers to light collecting device through the light output subassembly, thereby can effectively utilize non-projection light, avoid the waste of non-projection light.

In the embodiment of the application, the light emitted by the light source is time sequence light composed of various colors, the naked eye is white light, namely, the projection light generated after being modulated by the light modulator and the non-projection light form complementary light, for example, the projector outputs a red picture, and the projection light is red, and the non-projection light is complementary light cyan of red light. Since the colors and the brightness of the respective areas of the projection screen are different during normal projection, the colors and the brightness of the non-projection light also change with the colors and the brightness of the useful light. In this embodiment, the characteristic that the non-projection light changes with the projection screen is utilized, and the non-projection light is output through the light output component, so that the working state of the projector can be indicated.

In an embodiment of the present application, as shown in fig. 10A to 10C, the light output assembly includes a light guiding member 841 and an output terminal 842 connected to each other, wherein the light guiding member 841 is configured to transmit the non-projection light 1001 therein to the output terminal 842, so that the output terminal 842 outputs the non-projection light 1001. The light guiding element 841 may be an optical waveguide or other elements for transmitting light, for example, the light guiding element 841 may be an integrated optical waveguide, including a planar (thin film) dielectric optical waveguide or a stripe-shaped dielectric optical waveguide, and the light guiding element 841 may also be a cylindrical optical waveguide, that is, an optical fiber. Illustratively, in this embodiment, the light guide member 841 is selected as an optical fiber. The diameter and number of fibers is related to the illuminated area of the non-projection light 1001.

It should be noted that, as shown in fig. 10B, the light collecting device may include one light output assembly 84, or may include a plurality of light output assemblies 84, as shown in fig. 10C, where the former light output device includes one light guiding member 841 and one output terminal 842, and the latter light output device includes a plurality of light guiding members 841 and a plurality of output terminals 842.

In an embodiment of the present application, output terminal 842 is an interface configured to be connected to a display device to output non-projection light 1001 transmitted thereto by light guide 841 to the display device for display; or output terminal 842 is an indicator configured to present non-projection light 1001 into which light guide 841 is transmitted. Taking the output terminal 842 as an interface, the interface may be a general interface or a specific interface, so as to connect with a corresponding display device, after the non-projection light collected by the light collecting device enters the light guiding element 841, the light guiding element 841 transmits the non-projection light 1001 to the interface, and the non-projection light 1001 is output to the display device through the interface, and the display device displays the non-projection light 1001. Taking the output terminal 842 as an indicator, for example, after the non-projection light collected by the light collecting device enters the light guiding element 841, the light guiding element 841 transmits the non-projection light 1001 to the indicator, and the non-projection light 1001 is displayed and output through the indicator. The operating state of the projector can be characterized by the display state of the indicator. The indicator may display and output the non-projection light 1001 in a pattern, a line, or the like, or may use the outputted non-projection light 1001 as illumination light.

In summary, according to the projector according to the embodiment of the application, the refraction portion refracts the non-projection light to the area outside the projection lens, so that the non-projection light emitted by the refraction device is prevented from being incident into the projection lens, and stray light is not formed in the projection lens due to the non-projection light, thereby ensuring the contrast of a projection picture and improving the imaging quality. In addition, according to the projector disclosed by the embodiment of the application, the non-projection light rays emitted by the light folding device are collected through the light collecting device, so that on one hand, the non-projection light rays are prevented from forming stray light in the cavity of the projector, the temperature of the cavity of the projector is not increased, on the other hand, the volatile matters generated when the non-projection light rays are intensively irradiated to the local position in the cavity are prevented, and the pollution to optical elements in the cavity is avoided; the non-projection light collected by the light collecting device is output through the light output assembly, so that the non-projection light can be effectively utilized, and the waste of the non-projection light is avoided.

Although the illustrative embodiments have been described herein with reference to the accompanying drawings, it is to be understood that the above illustrative embodiments are merely illustrative and are not intended to limit the scope of the present application thereto. Various changes and modifications may be made therein by one of ordinary skill in the art without departing from the scope and spirit of the application. All such changes and modifications are intended to be included within the scope of the present application as set forth in the appended claims.

Similarly, it should be appreciated that in order to streamline the application and aid in understanding one or more of the various application aspects, various features of the application are sometimes grouped together in a single embodiment, figure, or description thereof in the description of exemplary embodiments of the application. However, the method of the present application should not be construed as reflecting the following intent: i.e., the claimed application requires more features than are expressly recited in each claim. Rather, as the following claims reflect, inventive subject matter lies in less than all features of a single disclosed embodiment. Thus, the claims following the detailed description are hereby expressly incorporated into this detailed description, with each claim standing on its own as a separate embodiment of this application.

Furthermore, those skilled in the art will appreciate that while some embodiments described herein include some features but not others included in other embodiments, combinations of features of different embodiments are meant to be within the scope of the application and form different embodiments. For example, in the claims, any of the claimed embodiments may be used in any combination.

It should be noted that the above-mentioned embodiments illustrate rather than limit the application, and that those skilled in the art will be able to design alternative embodiments without departing from the scope of the appended claims. In the claims, any reference signs placed between parentheses shall not be construed as limiting the claim. The use of the words first, second, third, etc. do not denote any order. These words may be interpreted as names.

Claims (12)

1. A projector comprising a refractive device, a projection lens and a light modulator, the refractive device being located between the projection lens and the light modulator, the light modulator being configured to modulate light reflected into the refractive device into projected light and non-projected light, characterized in that:

The refraction device comprises a light refraction component, and a refraction part is arranged along the edge of the light emergent surface of the light refraction component;

The refraction part comprises an incident surface and an emergent surface, wherein the incident surface and the emergent surface form a preset angle, and the incident surface is arranged on one surface of the refraction part, which is close to the light modulator.

2. The projector according to claim 1, wherein a refractive index of the refractive portion is equal to or less than a refractive index of the light refractive element.

3. The projector according to claim 1, wherein the predetermined angle satisfies the following condition:

α<θ-arccos(1/N)

Wherein α is the predetermined angle, N is the refractive index of the refractive portion, and θ is the angle between the non-projection light reflected by the light modulator into the light refractive component and the light exit surface of the light refractive component.

4. The projector of claim 1 wherein the refractive portion is located outside an area illuminated by projection light reflected by the light modulator into the light refracting assembly.

5. The projector of claim 1 wherein the refractive portion is a prism or a lens, wherein the prism comprises a plurality of prism units and the lens comprises a fresnel lens.

6. The projector according to claim 1, wherein the light refracting component comprises a first prism and a second prism which are arranged in a fitting manner, the refracting part is arranged at an edge position of a light emergent surface of the second prism, and the refracting part and the second prism are integrally formed.

7. The projector of claim 1 wherein the refractive portion is configured to refract the non-projection light to an area other than the projection lens.

8. The projector according to claim 1, further comprising a light shaping device for shaping the non-projection light rays emitted from the refraction device, and a light collecting device for collecting the non-projection light rays shaped by the light shaping device.

9. The projector as claimed in claim 8, wherein,

The light collection device includes a light absorbing assembly configured to absorb non-projection light collected by the light collection device;

An optical window is arranged between the light absorption component and the light shaping device;

The optical window is configured to spatially isolate the light absorbing assembly from the light shaping device and to transmit non-projection light rays shaped by the light shaping device to the light absorbing assembly;

The light collecting device further comprises a heat radiating part, wherein the heat radiating part is arranged outside the projector and is used for radiating heat outwards.

10. The projector of claim 8 wherein the light collection device includes a light output assembly configured to output non-projected light collected by the light collection device.

11. The projector of claim 10, wherein the light output assembly includes a light guide element and an output terminal connected to each other, wherein the light collection device is configured to guide non-projected light rays incident therein to the light guide element, the light guide element being configured to transmit the non-projected light rays therein to the output terminal to cause the output terminal to output the non-projected light rays.

12. The projector as claimed in claim 11, wherein,

The output terminal is an interface, and the interface is configured to be connected with a display device so as to output the non-projection light transmitted into the light guide element to the display device for display; or alternatively

The output terminal is an indicator configured to present non-projected light rays transmitted into the light guide element.