CN219936272U - Light source device and projection equipment - Google Patents

Abstract

The utility model relates to the technical field of display and discloses a light source device and projection equipment. In projection devices, the light source means is a very important component, which functions to convert light of different colors, different angular distributions, different brightness and different shapes into a uniform spot of light that impinges on the active area of the display chip. The utility model combines the light beam generated by the narrow-spectrum light source and the light beam generated by the wide-spectrum light source for projection, and can give consideration to the color gamut and the brightness of a projection picture. And the light beam reverse side generated by the narrow-spectrum light source is projected into the light homogenizing element through the light path increasing element, so that the light spot of the light beam is increased under the condition that the incidence angle of the light beam to the light homogenizing element is smaller, and the uniformity of a picture can be improved.

Description

Light source device and projection equipment

Technical Field

The present utility model relates to the field of projection display technologies, and in particular, to a light source device and a projection apparatus.

Background

In projection display products, the light source device is a very important component, and its function is to convert light rays of different colors, different angular distributions, different brightness and different shapes into uniform light spots irradiated to the effective area of the display chip.

In the field of projection display, conventional bulbs have not been adopted due to their own defects, and novel light sources such as LEDs, phosphors, and lasers have been increasingly becoming the main stream of light sources for projection display because they exhibit excellent characteristics in terms of brightness, color, lifetime, energy consumption, and the like. In these new light source technologies, it is difficult for LED light sources to achieve high brightness, while laser light sources suffer from speckle. Therefore, how to realize a high-quality picture with high brightness is a problem to be solved.

Disclosure of Invention

The utility model provides a light source device which can be used for projection equipment, and can give consideration to the color gamut and the brightness of a projection picture and improve the uniformity of the picture.

In a first aspect, the present utility model provides a light source device, the light source device comprising a narrow spectrum light source assembly, a wide spectrum light source assembly, an optical path increasing assembly, and a compensation lens, wherein:

the light beam generated by the narrow-spectrum light source component is injected into the compensation lens after the light path of the light beam is increased by the light path increasing component;

the light beam generated by the wide-spectrum light source component is emitted into the compensation lens and is combined with the light beam generated by the narrow-spectrum light source component emitted into the compensation lens.

In some embodiments, the optical path adding assembly includes a first reflective element and a second reflective element therein, wherein:

the light beam generated by the narrow-spectrum light source component is reflected by the first reflecting element and then enters the compensating lens, and the light beam enters the second reflecting element through the compensating lens and is reflected back to the compensating lens through the second reflecting element.

In some embodiments, the second reflective element is a reflective diffusing element, and the light beam incident on the second reflective element is speckle-suppressed and reflected by the reflective diffusing element.

In some embodiments, the gaussian half angle of the reflective diffusing element is greater than the first predetermined angle and less than the second predetermined angle.

In some embodiments, the first reflective element is at a target angle to an optical axis of a light beam generated by the narrow spectrum light source assembly.

In some embodiments, the narrow spectrum light source assembly includes at least one of a red laser, a green laser, a blue laser, and a light directing assembly therein:

the light beam generated by at least one of the red, green and blue lasers is directed to the first reflective element via the light directing assembly.

In some embodiments, the size of the first reflective element is determined by the size of the spot when the light beam emitted by the narrow spectrum light source assembly reaches the first reflective element, and the size of the second reflective element is determined by the size of the spot when the light beam emitted by the narrow spectrum light source assembly reaches the second reflective element.

In some embodiments, the second reflective element reflects the light beam generated by the narrow spectrum light source assembly and transmits the light beam generated by the broad spectrum light source assembly.

In some embodiments, the light beam generated by the narrow-spectrum light source assembly before passing through the optical path increasing assembly has an outgoing direction perpendicular to the outgoing direction of the light beam generated by the narrow-spectrum light source assembly before entering the compensation lens.

In some embodiments, the light beam generated by the narrow-spectrum light source assembly and the light beam generated by the wide-spectrum light source assembly at least comprise red light, green light and blue light, the light beam generated by the narrow-spectrum light source assembly is any one or more of red light, green light and blue light, and the light beam generated by the wide-spectrum light source assembly is any one or more of red light, green light and blue light.

In some embodiments, the optical path adding assembly includes a first reflective element therein, wherein:

the light beam generated by the narrow-spectrum light source component is reflected by the first reflecting element and then enters the compensating lens, and the light beam enters the wide-spectrum light source component through the compensating lens and is reflected back to the compensating lens through the wide-spectrum light source component.

In a second aspect, the present utility model provides a projection apparatus, including the light source device of the first aspect and any one of the possible implementation manners of the first aspect.

The utility model combines the light beam generated by the narrow-spectrum light source and the light beam generated by the wide-spectrum light source for projection, and can give consideration to the color gamut and the brightness of a projection picture. And the light beam reverse side generated by the narrow-spectrum light source is projected into the light homogenizing element through the light path increasing element, so that the light spot of the light beam is increased under the condition that the incidence angle of the light beam to the light homogenizing element is smaller, and the uniformity of a picture can be improved.

Drawings

The above and other objects, features and advantages of the present utility model will become more apparent from the following more particular description of embodiments of the present utility model, as illustrated in the accompanying drawings. The accompanying drawings are included to provide a further understanding of embodiments of the utility model and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the embodiments of the utility model, and not constitute a limitation to the utility model. In the drawings, like reference numerals generally refer to like parts or steps. Wherein:

FIG. 1 is a schematic diagram of a narrow spectrum light source module according to an embodiment of the present utility model;

FIG. 2 is a schematic diagram of a light source device according to an embodiment of the utility model;

fig. 3 is a schematic structural diagram of a light source device according to an embodiment of the utility model.

Detailed Description

In order to make the technical solution of the present utility model better understood by those skilled in the art, the technical solution of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are only some embodiments of the present utility model, not all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the present utility model without making any inventive effort, shall fall within the scope of the present utility model. Furthermore, while the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure may be separately implemented as a complete solution. The following embodiments and features of the embodiments may be combined with each other without conflict.

In embodiments of the utility model, words such as "exemplary," "such as" and the like are used to mean serving as an example, instance, or illustration. Any embodiment or design described herein as "exemplary" is not necessarily to be construed as preferred or advantageous over other embodiments or designs. Rather, the term use of an example is intended to present concepts in a concrete fashion.

Unless defined otherwise, technical or scientific terms used herein should be given the ordinary meaning as understood by one of ordinary skill in the art to which this utility model belongs. The terms "first," "second," and the like, as used herein do not denote any order, quantity, or importance, but rather are used to distinguish one element from another. The word "comprising" or "comprises", and the like, means that elements or items preceding the word are included in the element or item listed after the word and equivalents thereof, but does not exclude other elements or items. The term "and/or" includes any and all combinations of one or more of the associated listed items.

In order that the utility model may be fully understood, a detailed description will be provided below in order to illustrate the technical aspects of the utility model. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

The light source device provided by the utility model comprises a narrow-spectrum light source component, a wide-spectrum light source component, an optical path increasing component and a compensating lens, wherein: the light beam generated by the narrow-spectrum light source component is injected into the compensation lens after the light path of the light beam is increased by the light path increasing component; the light beam generated by the wide-spectrum light source component is emitted into the compensation lens and is combined with the light beam generated by the narrow-spectrum light source component emitted into the compensation lens.

The compensating lens can be a plano-convex lens, and can collimate the light beam generated by the broad spectrum light source component and the light beam generated by the narrow spectrum light source component entering the compensating lens.

In some embodiments, the light beam generated by the narrow-spectrum light source assembly and the light beam generated by the wide-spectrum light source assembly at least comprise red light, green light and blue light, the light beam generated by the narrow-spectrum light source assembly is any one or more of red light, green light and blue light, and the light beam generated by the wide-spectrum light source assembly is any one or more of red light, green light and blue light.

The wide spectrum light source assembly may include an LED light source therein, and may include one or more of a red LED light source generating red light, a green LED light source generating green light, and a blue LED light source generating blue light; for example, the narrow spectrum light source assembly may include a red LED light source and a green LED light source, and further include a red LED light source and a blue LED light source, and further include a red LED light source, a green LED light source, and a blue LED light source. Optionally, a focusing collimating lens group corresponding to the LED light source may be further included in the broad spectrum light source assembly.

The narrow-spectrum light source assembly may include a laser therein, and may include one or more of a red laser generating red light, a green laser generating green light, and a blue laser generating blue light; for example, the narrow spectrum light source assembly may include a red laser and a green laser, such as a red laser and a blue laser, and may include a red laser, a green laser, and a blue laser.

Optionally, the narrow spectrum light source assembly includes at least one of a red laser, a green laser, and a blue laser, and a light guiding assembly, wherein: the light beam generated by at least one of the red, green and blue lasers is directed to the first reflective element via the light directing assembly. For example, fig. 1 is a schematic diagram of a narrow spectrum light source module provided by the present utility model; as shown in fig. 1, the narrow-spectrum light source assembly includes a red laser 11, a green laser 12, and a blue laser 13, and the light guide assembly includes a reflecting mirror 14, a dichroic mirror one 15, and a dichroic mirror two 16. Blue light generated by the blue laser 13 is reflected by the reflecting mirror 14, then enters the dichroic mirror two 16 through the dichroic mirror two 15, and is reflected to a first reflecting element (not shown in the figure) through the dichroic mirror two 16. The green laser 12 produces red light that is reflected by dichroic mirror one 15 to dichroic mirror two 16 and reflected by dichroic mirror two 16 to the first reflective element. Red light generated by the red laser 11 is transmitted to the first reflective element via the dichroic mirror 16. By guiding the light beams of the plurality of lasers to the same element and then entering the first reflecting element and the second reflecting element, the sizes of the first reflecting element and the second reflecting element can be reduced, and thus the light loss can be reduced. For another example, assuming that the narrow-spectrum light source assembly includes three blue lasers, each blue laser may correspond to a small mirror, and the spot size of the light beam generated by the three blue lasers is adjusted by the small mirror.

Optionally, the light source device further includes a light homogenizing element, and the light beam after the light combination at the compensating lens is incident into the light homogenizing element for homogenizing. The light homogenizing element can be compound eye, light bar, etc.

In some embodiments, the optical path adding assembly includes a first reflective element and a second reflective element therein, wherein: the light beam generated by the narrow-spectrum light source component is reflected by the first reflecting element and then enters the compensating lens, and is reflected by the second reflecting element and then returns to the compensating lens after entering the second reflecting element. The compensation lens may be a plano-convex lens that focuses the light beam. The light path of the light beam generated by the narrow-spectrum light source assembly is increased, so that the light spot of the light beam can be increased and the uniformity can be improved while the light beam is emitted into the light homogenizing element at a small angle.

Optionally, the second reflecting element is a reflective diffusing element, and the light beam incident on the second reflecting element is speckle-suppressed and reflected by the reflective diffusing element. For example, the second reflective element may be a reflective diffuser. Alternatively, the second reflective element may also be a planar mirror.

Optionally, the gaussian half angle of the reflective diffusion element is larger than the first preset angle and smaller than the second preset angle. The first preset angle and the second preset angle can be set in a self-defined mode according to practical application conditions, for example, the first preset angle can be 1 degree, and the second preset angle can be 5 degrees.

Optionally, the first reflective element is at a target angle to the optical axis of the light beam generated by the narrow spectrum light source assembly. The target angle can be obtained by adjusting the first reflecting element according to actual application conditions.

Optionally, the size of the first reflecting element is determined by the size of the light spot when the light beam emitted from the narrow spectrum light source assembly reaches the first reflecting element, and the size of the second reflecting element is determined by the size of the light spot when the light beam emitted from the narrow spectrum light source assembly reaches the second reflecting element. The size of the spot of the light beam as it reaches the first reflective element is determined by the optical path taken by the light beam.

Optionally, the second reflecting element reflects the light beam generated by the narrow-spectrum light source assembly and transmits the light beam generated by the wide-spectrum light source assembly. If the wave band of the light beam generated by the narrow-spectrum light source component is not intersected with the wave band of the light beam generated by the wide-spectrum light source component; for example, the wavelength band of blue light generated by the narrow-spectrum light source assembly is 450nm-480nm, and the wavelength band of blue light generated by the wide-spectrum light source assembly is 400nm-450nm. For another example, the light beam generated by the narrow-spectrum light source assembly is red light, and the light beam generated by the wide-spectrum light source assembly is deep red light.

Optionally, when the wave band of the light beam generated by the narrow-spectrum light source assembly intersects with the wave band of the light beam generated by the broad-spectrum light source assembly, the second reflecting element may reflect part of the light beam generated by the narrow-spectrum light source assembly and transmit part of the light beam generated by the broad-spectrum light source assembly. When the wave band of the light beam generated by the narrow-spectrum light source component is mostly intersected with the wave band of the light beam generated by the wide-spectrum light source component, the second reflecting element can reflect the light beam generated by the narrow-spectrum light source component.

Optionally, the outgoing direction of the light beam generated by the narrow-spectrum light source assembly before passing through the optical path increasing assembly is perpendicular to the outgoing direction of the light beam generated by the narrow-spectrum light source assembly before entering the compensating lens.

Optionally, the optical path increasing element includes a first reflective element therein, wherein: the light beam generated by the narrow-spectrum light source component is reflected by the first reflecting element and then enters the compensating lens, and the light beam enters the wide-spectrum light source component through the compensating lens and is reflected back to the compensating lens through the wide-spectrum light source component. For example, an LED light source in a broad spectrum light source assembly may reflect a light beam generated by a narrow spectrum light source assembly using the reflective properties of its substrate.

Fig. 2 is a schematic view of a light source device provided by the present utility model. As shown in fig. 2, the light source device may include a narrow-spectrum light source assembly 10, a wide-spectrum light source assembly 20, a first reflecting element 30, a second reflecting element 40, a compensating lens 50, and a light homogenizing element 60. Wherein, the narrow spectrum light source assembly 10 may be a narrow spectrum light source assembly as shown in fig. 1; the broad spectrum light source assembly 20 includes a red LED light source 21 and a corresponding focusing collimator lens group 22.

When the light source device is required to generate red light, the narrow-spectrum light source assembly 10 generates red light, the red light is reflected by the first reflecting element 30 and then is emitted into the compensating lens 50, the red light is focused by the compensating lens 50 and then is emitted into the second reflecting element 40, and the red light is reflected by the second reflecting element 40 and then is reflected back to the compensating lens 50; meanwhile, the red LED light source 21 generates red light, and the red light is focused and collimated by the focusing and collimating lens group 22 and then is emitted into the compensating lens 50 to be combined with the red light generated by the narrow-spectrum light source assembly 50 emitted into the compensating lens from the second reflecting element 40; the combined red light is incident on the light uniformizing element 60 to be homogenized.

When the light source device is required to generate blue light, the narrow-spectrum light source assembly 10 generates blue light, reflects the blue light through the first reflecting element 30, then emits the blue light into the compensating lens 50, focuses the blue light through the compensating lens 50, emits the blue light into the second reflecting element 40, and reflects the blue light back to the compensating lens 50 through the second reflecting element 40; after being collimated again by the compensation lens 50, the light enters the light homogenizing element 60 for homogenizing.

When the light source device is required to generate green light, the narrow-spectrum light source assembly 10 generates green light, reflects the green light through the first reflecting element 30, then enters the compensating lens 50, focuses through the compensating lens 50, then enters the second reflecting element 40, and reflects the green light back to the compensating lens 50 through the second reflecting element 40; after being collimated again by the compensation lens 50, the light enters the light homogenizing element 60 for homogenizing.

Fig. 3 is a schematic view of a light source device provided by the present utility model. As shown in fig. 3, in contrast to the light source device shown in fig. 2, the light source device of the present embodiment does not have the second reflecting element 40, and the light beam generated by the narrow-spectrum light source assembly 10 is reflected by the first reflecting element 30, then enters the compensating lens 50, is focused by the compensating lens 50, then enters the focusing collimating lens group 22, is focused and collimated, then enters the LED light source 21, is reflected by the LED light source 21 back to the collimating lens group 22, and then enters the compensating lens 50 by the collimating lens group 22.

The light source device provided by the utility model combines the light beam generated by the narrow-spectrum light source and the light beam generated by the wide-spectrum light source for projection, so that the color gamut and the brightness of a projection picture can be simultaneously achieved. And the light beam reverse side generated by the narrow-spectrum light source is projected into the light homogenizing element through the light path increasing element, so that the light spot of the light beam is increased under the condition that the incidence angle of the light beam to the light homogenizing element is smaller, and the uniformity of a picture can be improved.

The light source device of the utility model can be applied to any application scene requiring synthesized light, including but not limited to projectors, such as single DLP projector and triple DLP projector.

The embodiment of the present utility model further provides a projection device, which includes the light source device related to the above embodiment, and other components, such as a projection lens, are further included in the projection device, and the arrangement of these components can be referred to the related art, which is not described herein.

The terminology used in the embodiments of the utility model is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in this application and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should also be understood that the term "and/or" as used herein refers to and encompasses any or all possible combinations of one or more of the associated listed items. The character "/" herein generally indicates that the associated object is an "or" relationship.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims (12)

1. The utility model provides a light source device, its characterized in that, light source device includes narrow spectrum light source subassembly, wide spectrum light source subassembly, optical path increase subassembly, compensation lens, wherein:

the light beam generated by the narrow-spectrum light source component is injected into the compensation lens after the light path of the light beam is increased by the light path increasing component;

the light beam generated by the wide-spectrum light source component is emitted into the compensation lens and is combined with the light beam generated by the narrow-spectrum light source component emitted into the compensation lens.

2. The light source device according to claim 1, wherein the optical path increasing member includes a first reflecting element and a second reflecting element, wherein:

the light beam generated by the narrow-spectrum light source component is reflected by the first reflecting element and then enters the compensating lens, the light beam enters the second reflecting element through the compensating lens, and the light beam is reflected back to the compensating lens through the second reflecting element.

3. The light source device according to claim 2, wherein the second reflecting element is a reflecting diffusing element, and the light beam incident on the second reflecting element is speckle-suppressed and reflected by the reflecting diffusing element.

4. A light source device as recited in claim 3, wherein the gaussian half angle of the reflective diffusing element is greater than the first predetermined angle and less than the second predetermined angle.

5. The light source device of claim 2, wherein the first reflective element is at a target angle to an optical axis of the light beam generated by the narrow spectrum light source assembly.

6. The light source device of claim 2, wherein the narrow spectrum light source assembly comprises at least one of a red laser, a green laser, and a blue laser, and a light guiding assembly, wherein:

a light beam generated by at least one of a red laser, a green laser, and a blue laser is directed to the first reflective element via the light guiding assembly.

7. The light source device according to claim 2, wherein the size of the first reflecting element is determined by the size of a spot when the light beam emitted from the narrow-spectrum light source module reaches the first reflecting element, and the size of the second reflecting element is determined by the size of a spot when the light beam emitted from the narrow-spectrum light source module reaches the second reflecting element.

8. The light source device according to claim 2, wherein the second reflecting element reflects the light beam generated by the narrow-spectrum light source module and transmits the light beam generated by the wide-spectrum light source module.

9. The light source device according to claim 1, wherein an outgoing direction of the light beam generated by the narrow-spectrum light source module before passing through the optical path increasing module is perpendicular to an outgoing direction of the light beam generated by the narrow-spectrum light source module before entering the compensation lens.

10. The light source device according to claim 1, wherein at least one of the light beam generated by the narrow-spectrum light source module and the light beam generated by the wide-spectrum light source module includes red light, green light and blue light, the light beam generated by the narrow-spectrum light source module is any one or more of red light, green light and blue light, and the light beam generated by the wide-spectrum light source module is any one or more of red light, green light and blue light.

11. The light source device according to claim 1, wherein the optical path increasing member includes a first reflecting element therein, wherein:

the light beam generated by the narrow-spectrum light source component is reflected by the first reflecting element and then enters the compensating lens, the light beam enters the wide-spectrum light source component through the compensating lens, and the light beam is reflected back to the compensating lens through the wide-spectrum light source component.

12. A projection apparatus comprising the light source device of any one of claims 1-11.