CN115113472A

CN115113472A - Light source device and projection system

Info

Publication number: CN115113472A
Application number: CN202210725162.6A
Authority: CN
Inventors: 王皓冬
Original assignee: Qingdao Hisense Laser Display Co Ltd
Current assignee: Qingdao Hisense Laser Display Co Ltd
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-27

Abstract

The invention discloses a light source device and a projection system. The first light combination assembly comprises a reflection area and a through hole, the reflection area is used for reflecting the emergent light of the LED light source assembly to the set direction, and the through hole is used for transmitting the emergent light of the laser light source assembly to the set direction. The light source device is improved on the basis of not changing the structure of the LED light source component, and the light-emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the size and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the size and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly with the laser light source assembly.

Description

Light source device and projection system

Technical Field

The invention relates to the technical field of projection display, in particular to a light source device and a projection system.

Background

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space. With the development of projection display technology, projection display is gradually applied to the fields of business activities, conference exhibition, scientific education, military command, traffic management, centralized monitoring, advertising and entertainment and the like, and the advantages of large display screen size, clear display and the like are also suitable for the requirement of large-screen display.

The Light Emitting Diode (LED) has the advantages of fast response, low power consumption, long service life and the like, and the application of the LED to a projection system can change the complex optical path structure of the original Light source; and the LED light source has small volume, thereby being beneficial to the miniaturization and lightweight design of the projection system.

However, the current LED light source projection system still has a problem of low brightness due to the loss of light energy in the projection process, and cannot further improve the color of the color picture and increase the color gamut.

Disclosure of Invention

In some embodiments of the invention, a light source device comprises: LED light source subassembly, laser light source subassembly and first light subassembly that closes. The first light combination component combines three-color light emitted by the LED light source component and laser emitted by the laser light source component. The first light combination assembly comprises a reflection area and a through hole, the reflection area is used for reflecting the emergent light of the LED light source assembly to the set direction, the through hole is used for transmitting the emergent light of the laser light source assembly to the set direction, and therefore the laser light emitted by the three-color light emitted by the LED light source assembly and the laser light emitted by the laser light source assembly are combined. The brightness of the laser light source component is larger than that of the LED light source component, the laser light source component is added in the light source device, monochromatic light emitted by the laser light source component is combined with three-color light emitted by the LED light source component, the light source device can be improved on the basis of not changing the structure of the LED light source component, and the light emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

In some embodiments of the present invention, an LED light source assembly comprises: the LED light source comprises a first LED light source, a second LED light source, a third LED light source and a second light combination component. The second light combining component is positioned at the intersection of the emergent light of each LED light source, and can combine the light with different colors emitted by each LED light source into white light to be emitted to the first light combining component.

In some embodiments of the present invention, the LED light source module further comprises: and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light with a second wave band. The fourth LED light source emits light of a third wave band to the second LED light source through the second light combining component, so that fluorescent powder in the second LED light source is excited to increase emission of light of the second wave band.

In some embodiments of the present invention, the laser light source assembly includes at least one laser light source, the laser light source emits light in a first wavelength band, and the color of the light emitted by the laser light source is the same as that of the light emitted by the first LED light source.

In some embodiments of the present invention, in order to increase the laser intensity, two or more laser light sources may be disposed in the laser light source assembly. The laser light source can adopt a laser chip or a laser. And a converging lens group is arranged on the light emitting side of each laser light source to converge the laser emitted by each laser light source, so that the emergent light of each laser light source is combined into one laser spot.

In some embodiments of the present invention, the first LED light source is a red LED, the second LED light source is a green LED, and the third LED light source and the fourth LED light source are blue LEDs. The laser light source adopts a red light laser chip or a red light laser.

In some embodiments of the present invention, the second light combining component includes: the first light-combining mirror and the second light-combining mirror. The first light combining mirror is located at the intersection of the emergent light of the first LED light source and the emergent light of the third LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the first wave band. The second light combining mirror is positioned at the intersection of the emergent light of the first light combining mirror and the emergent light of the second LED light source and the intersection of the emergent light of the second LED light source and the emergent light of the fourth LED light source, and the second light combining mirror is used for transmitting the light of the second wave band and reflecting the light of the first wave band and the light of the third wave band. The first light-combining mirror and the second light-combining mirror can both adopt dichroic mirrors.

In some embodiments of the present invention, the first light combining component employs a reflector, and the reflector includes a through hole. The reflector is used for reflecting the light of the first wave band, the light of the second wave band and the light of the third wave band, and the through hole is used for transmitting laser. The reflector has higher reflectivity to the three-color light of LED light source subassembly outgoing, and laser has higher collimation degree, and the facula size is less, sets up on the reflector and can transmit laser through to reach the purpose that LED three-color light closed light with laser.

In some embodiments of the present invention, the through hole is located at a center position of the reflector, and a connection line between a center point of the reflector and a center point of the second light combining mirror is parallel to a light emitting direction of the second LED light source. The laser facula that the laser light source subassembly was sent out the speculum is symmetrical about the central point of speculum, and the facula that LED light source subassembly was sent out on the speculum is symmetrical for the central point of speculum. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

In some embodiments of the invention, the through hole can transmit part of the emergent light of the LED light source assembly to cause light loss, so the size of the through hole is set as small as possible, so that the area of the through hole is smaller than or equal to 1/10 of the area of the emergent light spot of the LED light source assembly based on the laser light spot, and the energy loss of the emergent light of the LED light source assembly transmitted by the through hole is controlled to be below 10%. Since the laser light has a large energy with respect to the light emitted from the LED, the light loss can be compensated.

In some embodiments of the present invention, the LED light source module further comprises: the lens comprises a first collimating lens group, a second collimating lens group, a third collimating lens group and a fourth collimating lens group. The first collimating lens group is positioned on the light-emitting side of the first LED light source; the second collimating lens group is positioned on the light-emitting side of the second LED light source; the third collimating lens group is positioned on the light-emitting side of the third LED light source; the fourth collimating lens group is positioned at the light-emitting side of the fourth LED light source. Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

In some embodiments of the present invention, the LED light source module further comprises: and a beam shrinking lens group. The beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens. Because the optical paths of the emergent lights of the LED light sources before being combined are different, and the emergent light of the LED light sources has a certain divergence angle, the light path of the first LED light source and the third LED light source before being incident on the second light combining mirror is longer relative to the light path of the second LED light source before being incident on the second light combining mirror, and the light spot size after being dispersed is larger as the light path is longer, the combined light of the first LED light source and the third LED light source needs to be condensed by the beam condensing lens group before being incident on the second light combining mirror, so that the light spot size of the combined light of the first LED light source and the third LED light source is the same as possible as the light spot size of the second LED light source.

In some embodiments of the present invention, the LED light source module further comprises: and the first light homogenizing part is positioned on the light emergent side of the second light combining mirror. Correspondingly, the laser light source assembly further comprises: and the second dodging component is positioned on the light outlet side of the converging lens group. Even light parts are respectively arranged aiming at the light paths of the LED light source component and the laser light source component, the structure of the LED light source component is not required to be changed, and emergent light of the two light source components is uniform light beams. The first dodging component adopts a compound eye lens group, and the second dodging component can adopt a light guide pipe, a light bar and the like.

In some embodiments of the present invention, the laser light source module further comprises: and the fifth collimating lens group is positioned on the light-emitting side of the second dodging component. The emergent laser of laser light source subassembly need close light through the through-hole of speculum and the emergent light of LED light source subassembly, and in order to make the final emergent facula of laser light source subassembly little enough, set up the further collimation of the laser beam after the fifth collimating lens group is homogenized in the light-emitting side of the even light part of second to the laser beam that makes the final emergent of laser light source subassembly can pass the through-hole as far as and be utilized.

In some embodiments of the present invention, a projection system includes any of the light source devices, an illumination light path, a light valve modulation component, and a projection lens. The light source device comprises a light source device, a light valve modulation component, a projection lens and a light source device, wherein the light path is positioned on the light emitting side of the light source device, the light valve modulation component is positioned on the light emitting side of the light path, and the projection lens is positioned on the reflection light path of the light valve modulation component. The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings needed to be used in the embodiments of the present invention will be briefly described below, and it is obvious that the drawings described below are only some embodiments of the present invention, and it is obvious for those skilled in the art that other drawings can be obtained according to the drawings without creative efforts.

FIG. 1 is a schematic diagram of a light source device in the related art;

fig. 2 is a schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of an LED light source assembly according to an embodiment of the present invention;

fig. 4 is a second schematic structural diagram of a light source device according to an embodiment of the invention;

fig. 5 is a third schematic structural diagram of a light source device according to an embodiment of the present invention;

FIG. 6 is a fourth schematic structural diagram of a light source device according to an embodiment of the present invention;

FIG. 7 is a fifth schematic view illustrating a structure of a light source device according to an embodiment of the present invention;

FIG. 8 is a sixth schematic view illustrating a structure of a light source device according to an embodiment of the present invention;

fig. 9 is a seventh schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 10 is an eighth schematic structural diagram of a light source device according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a projection system according to an embodiment of the present invention.

Wherein, S1-LED light source component, S2-laser light source component, S3-first light combination component, 2-second light combination component, 11-first LED light source, 12-second LED light source, 13-third LED light source, 14-fourth LED light source, L-laser light source, 21-first light combination mirror, 22-second light combination mirror, 31-first collimating lens group, 32-second collimating lens group, 33-third collimating lens group, 34-fourth collimating lens group, 35-converging lens group, h-through hole, f-reflecting region, 4-converging lens group, 51-first dodging component, 52-second dodging component, 6-fifth collimating lens group, 100-light source device, 200-lighting light path, 300-light valve modulation component, 400-projection lens.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, the present invention is further described with reference to the accompanying drawings and examples. Example embodiments may, however, be embodied in many different 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 concept of example embodiments to those skilled in the art. The same reference numerals in the drawings denote the same or similar structures, and thus their repetitive description will be omitted. The words expressing the position and direction described in the present invention are illustrated in the accompanying drawings, but may be changed as required and still be within the scope of the present invention. The drawings of the present invention are for illustrative purposes only and do not represent true scale.

Projection display is a technique in which a light source is controlled by plane image information, and an image is enlarged and displayed on a projection screen using an optical system and a projection space.

Projection light sources, which are important components in projection systems, determine display brightness and gamut range. The Light Emitting Diode (LED) has the advantages of fast response, low power consumption, long service life and the like, and the complex Light path structure of the original Light source can be changed by using the LED as the Light source of the projection system; and the LED light source has small volume, thereby being beneficial to the miniaturization and lightweight design of the projection system.

In order to realize a full-color display, a light source device is generally required to be provided with a light source capable of emitting light of three primary colors, and in a light source device having LEDs as light sources, a first LED light source for emitting red light, a second LED light source for emitting green light, and a third LED light source for emitting blue light may be provided at the same time.

Fig. 1 is a schematic structural diagram of a light source device in the related art.

As shown in fig. 1, the red light a emitted from the first LED light source 11, the green light b emitted from the second LED light source 12, and the blue light c emitted from the third LED light source 13 are combined and emitted. Thereby enabling the projection light source to emit tricolor light.

However, due to the loss of light energy in the projection process, the current projection system using LED light source still has the problem of low brightness, and due to the limited color gamut of LED, it is unable to further improve the color of color picture and increase the color gamut.

Therefore, the embodiment of the invention adds the laser light source on the basis of the LED light source system, is used for improving the brightness of the light source device, and is beneficial to further improving the color gamut range and optimizing the color expression capability of the projection system.

Fig. 2 is a schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 2, a light source device provided in an embodiment of the present invention includes: an LED light source component S1, a laser light source component S2 and a first light combining component S3.

Wherein, LED light source assembly S1 at least includes: a first LED light source 11, a second LED light source 12 and a third LED light source 13. The first LED light source 11 emits light of a first wavelength band, the second LED light source 12 emits light of a second wavelength band, and the third LED light source 13 emits light of a third wavelength band. In this embodiment of the present invention, the light of the first wavelength band may be red light, the light of the second wavelength band may be green light, and the light of the third wavelength band may be blue light, which is not limited herein.

The laser light source module S2 includes at least one laser light source L emitting laser light of a first wavelength band. The half-peak width of the laser is narrow and has a high energy at the peak wavelength, while the LED light source emits light with a small energy and covers a wide wavelength band compared to the laser light source. In the embodiment of the present invention, the first LED light source 11 emits light of the same color as the laser light source L, and the laser light source L emits laser light of red light.

The first light combining component S3 is located at an intersection of the emergent light of the LED light source component S1 and the emergent light of the laser light source component S2, and the first light combining component S3 is used for reflecting the emergent light of the LED light source component S1 and transmitting the emergent light of the laser light source component S2.

The light source device provided by the embodiment of the invention comprises two light source components, namely an LED light source component and a laser light source component, wherein the brightness of the laser light source component is larger than that of the LED light source component; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

Specifically, as shown in fig. 2, a second light combining component 2 is disposed in the LED light source assembly, and the second light combining component 2 is located at the intersection of the light emitted from each LED light source, so that the light emitted from each LED light source with different colors can be combined into white light, and the white light is emitted to the first light combining component S3.

In specific implementation, the first LED light source 11 is a red LED, the second LED light source 12 is a green LED, and the third LED light source 13 is a blue LED. The laser light source L is a red laser chip or a red laser, and is not limited herein.

The green LED has low brightness, and the green LED is internally provided with green fluorescent powder, and the blue LED chip is adopted to excite the green fluorescent powder to emit green light. In order to improve the brightness of the green light, a blue light source can be added for emitting and irradiating the excited green fluorescent powder, and the stimulated emission times of the green fluorescent powder in the green light LED are increased so as to enhance the intensity of the green light.

Fig. 3 is a schematic structural diagram of an LED light source assembly according to an embodiment of the present invention.

In some embodiments, as shown in fig. 3, the LED light source assembly further comprises: a fourth LED light source 14. The fourth LED light source 14 emits light of a third wavelength band, and the fourth LED light source is configured to illuminate light that excites the second LED light source 12 to emit light of a second wavelength band.

The fourth LED light source 14 can emit light of a third wavelength band to the second LED light source 12 through the second light combining component 2, so as to excite the phosphor in the second LED light source 12 to increase the emission of light of the second wavelength band. In an embodiment of the present invention, the light of the second wavelength band may be green light, and the light of the third wavelength band may be blue light; the second LED light sources 12 may be green LEDs and the fourth LED light sources 14 may be blue LEDs. Thereby, the green light brightness of the light source device can be increased.

Fig. 4 is a second schematic structural diagram of a light source device according to an embodiment of the invention.

As shown in fig. 4, the second light combining component includes: a first light combining mirror 21 and a second light combining mirror 22; the first LED light source 11 and the second LED light source 12 are arranged in parallel, the first LED light source 11 and the third LED light source 13 are arranged vertically, and the second LED light source 12 and the fourth LED light source 14 are arranged vertically.

The first light combining mirror 21 is located at a junction of the emergent light of the first LED light source 11 and the emergent light of the third LED light source 13, and the first light combining mirror 21 is configured to transmit the light c of the third wavelength band and reflect the light a of the first wavelength band.

The second light combining mirror 22 is located at a junction between the emergent light of the first light combining mirror 21 and the emergent light of the second LED light source 12 and a junction between the emergent light of the second LED light source 12 and the emergent light of the fourth LED light source 14, and the second light combining mirror 22 is configured to transmit the light b of the second wavelength band and reflect the light a of the first wavelength band and the light c of the third wavelength band.

In the embodiment of the present invention, the light a in the first wavelength band is red light, the light b in the second wavelength band is green light, and the light c in the third wavelength band is blue light. The first light-combining mirror 21 and the second light-combining mirror 22 can both adopt dichroic mirrors, the dichroic mirrors are formed by coating films on the surfaces of transparent flat plates by utilizing the thin film interference principle, and light with different wave bands can be reflected or increased according to the required anti-reflection.

Specifically, as shown in fig. 4, the first light combiner 21 is used to transmit blue light and reflect red light. The blue light (c) emitted from the third LED light source 13 enters the first light combiner 21 and is transmitted by the first light combiner 21 in the direction of the second light combiner 22; red light (a) emitted from the first LED light source 11 enters the first light combining mirror 21 and is reflected by the first light combining mirror 21 in the direction of the second light combining mirror 22; thereby combining the blue light (c) and the red light (a).

The second combiner 22 is arranged to transmit green light and reflect blue and red light. The blue light (c) and the red light (a) emitted from the first light combining mirror 21 enter the second light combining mirror 22 and are reflected in a predetermined direction by the second light combining mirror 22; blue light (c) emitted from the fourth LED light source 14 enters the second light combiner 22 and is reflected by the second light combiner 22 in the direction of the second LED light source 12; the blue light (c) emitted from the fourth LED light source 14 excites the green light (b) emitted from the phosphor in the second LED light source 12 and the green light (b) emitted from the second LED light source 12 to enter the second combiner 22, and is transmitted in the set direction by the second combiner 22; thereby, the red light (a), the green light (b), and the blue light (c) are combined into white light and emitted in a predetermined direction.

It should be noted that, in the embodiment of the present invention, the light emitting directions of the LED light sources are parallel or perpendicular, so that any light combining mirror in the second light combining assembly needs to be arranged at an included angle of 45 ° with the incident light. When the LED light source is incident to any light combining mirror in the light combining component, the LED light source is incident to the central position of the light combining mirror, so that the centers of light spots incident to the light combining mirror are overlapped, and the energy distribution of the light combining light spots is more uniform.

Fig. 5 is a third schematic structural diagram of a light source device according to an embodiment of the present invention.

At least one laser light source L is provided in the laser light source unit S2, and two or more laser light sources L may be provided in the laser light source unit S2 as shown in fig. 5 in order to increase the laser intensity. The laser light source L may employ a laser chip or a laser. In the embodiment of the present invention, the laser light source module S2 may include two laser light sources L arranged in parallel, and the laser light sources may be red lasers.

In a specific implementation, a converging lens group 35 may be disposed on the light emitting side of each laser light source L to converge the laser light emitted from each laser light source L, so that the light emitted from each laser light source L is combined into one laser spot.

In the embodiment of the present invention, the converging lens group 35 includes at least one lens, and when only one lens is used, the lens may be a convex lens, which is not limited herein.

The light combining principle of the LED light source unit S1 and the laser light source unit S2 will be specifically described below. Fig. 6 is a fourth schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 6, the first light combining component S3 includes a reflection area f and a through hole h. The reflecting area f is used for reflecting the emergent light of the LED light source component S1 to a set direction; the through hole h is used for transmitting the outgoing light of the laser light source unit S2 to a set direction. In fig. 6, the direction is set to the horizontal right direction, and the first light combining unit S3 is used to combine the light emitted from the LED light source unit S1 and the light emitted from the laser light source unit S2 in the same direction.

Specifically, the first light combination component S3 employs a reflector, and the reflector includes a through hole h. The reflector is used for reflecting the light a of the first waveband, the light b of the second waveband and the light c of the third waveband, and the through hole h is used for transmitting the laser d.

In the embodiment of the present invention, the first light combining block S3 uses a mirror having a pass-through h instead of a dichroic mirror, because the first light combining block S3 needs to reflect the light a in the first wavelength band, the light b in the second wavelength band, and the light c in the third wavelength band at the same time, and needs to transmit the laser light d in the first wavelength band, and the dichroic mirror cannot reflect and transmit the light in the same wavelength band at the same time. Therefore, the reflector with the through hole is adopted, on one hand, the three-color light emitted by the LED light source assembly S1 has high reflectivity, on the other hand, the laser has high collimation degree, the light spot size is small, and the reflector is provided with a light-transmitting laser through which the laser can be transmitted, so that the purpose of combining the three-color light of the LED and the laser is achieved.

In the embodiment of the present invention, as shown in fig. 6, the through hole h is located at the center of the reflector, and the connection line between the center point of the reflector and the center point of the second light combining mirror 22 is parallel to the light emitting direction of the second LED light source 12. The laser spot emitted to the reflector from the laser light source assembly S2 is symmetrical about the center point of the reflector, and the spot emitted to the reflector from the LED light source assembly S1 is symmetrical relative to the center point of the reflector. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

Since the through hole h can transmit a part of the emergent light of the LED light source assembly S1 to cause light loss, in the embodiment of the present invention, the size of the through hole h is set as small as possible, so that the area of the through hole h is smaller than or equal to 1/10, which is the area of the emergent light spot of the LED light source assembly S1, based on the laser light spot, and thus the energy loss of the emergent light of the LED light source assembly S1 transmitted by the through hole h is controlled to be less than 10%. Since the laser light has a large energy with respect to the light emitted from the LED, the light loss can be compensated.

Fig. 7 is a fifth schematic structural view of a light source device according to an embodiment of the invention.

As shown in fig. 7, LED light source assembly S1 further includes: a first collimating lens group 31, a second collimating lens group 32, a third collimating lens group 33, and a fourth collimating lens group 34. Wherein, the first collimating lens group 31 is located at the light emitting side of the first LED light source 11; the second collimating lens group 32 is positioned at the light-emitting side of the second LED light source 12; the third collimating lens group 33 is located at the light emitting side of the third LED light source 13; the fourth collimating lens group 34 is located on the light exit side of the fourth LED light source 14.

Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

The collimating lens group includes at least one lens, as shown in fig. 7, and in an embodiment of the present invention, the collimating lens group may include two lenses, which is not limited herein.

Fig. 8 is a sixth schematic structural view of a light source device according to an embodiment of the present invention.

As shown in fig. 8, LED light source assembly S1 further includes: a converging lens group 4. The beam-shrinking lens group 4 is positioned between the first light-combining mirror 21 and the second light-combining mirror 22.

Because the optical paths of the emergent lights of the LED light sources before combining are different, and the emergent lights of the LED light sources have a certain divergence angle, the optical paths of the first LED light source 11 and the third LED light source 13 before entering the second light combining mirror 22 are longer relative to the optical path of the second LED light source 12, and the light spot size after the light paths diverge as long as possible is larger, it is necessary to perform beam reduction on the combined light of the first LED light source 11 and the third LED light source 13 before entering the second light combining mirror 22 by the beam reduction lens group 4, so that the light spot size of the combined light of the first LED light source 11 and the third LED light source 13 is as same as the light spot size of the second LED light source 12 as possible.

In the embodiment of the present invention, the reduction lens group 4 includes at least one lens, and when only one lens is adopted, the lens may be a convex lens, which is not limited herein.

Fig. 9 is a seventh schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 9, LED light source assembly S1 further includes: and the first dodging member 51 is positioned at the light emitting side of the second light combining mirror 22, and the first dodging member 51 is positioned at the light emitting side of the second light combining mirror 22. Accordingly, the laser light source module S2 further includes: and a second dodging member 52, the second dodging member 52 being located on a light exit side of the condensing lens group 35.

In the embodiment of the present invention, the first light uniformizing element 51 is disposed on the light exit side of the second light combining mirror 22, and the second light uniformizing element 52 is disposed on the light exit side of the converging lens group 35, so that light uniformizing elements can be respectively disposed for the light paths of the LED light source assembly S1 and the laser light source assembly S2, the structure of the LED light source assembly S1 does not need to be changed, and the emergent light of both light source assemblies is uniform light beams.

In a specific implementation, as shown in fig. 9, the first light uniformizing part 51 may adopt a fly-eye lens group, where the fly-eye lens group includes a first fly-eye lens and a second fly-eye lens which are arranged oppositely, and surfaces of the first fly-eye lens and the second fly-eye lens each include a micro lens unit arranged in an array. The light beams after light combination pass through the first fly-eye lens and are focused to the center of each micro lens unit of the second fly-eye lens, and the second fly-eye lens enables imaging light rays of the first fly-eye lens to be overlapped and imaged on the illumination surface. Thereby effectively improving the uniformity of the illumination light beam and the illumination brightness. The second light unifying part 52 may adopt a light guide, a light bar, and the like, and is not limited herein.

In addition, the first light homogenizing member 51 and the second light homogenizing member 52 may also adopt other optical elements with light homogenizing function for homogenizing the emergent light of each light source assembly so as to make the energy of the emergent light spot more uniform.

Fig. 10 is an eighth schematic structural diagram of a light source device according to an embodiment of the present invention.

As shown in fig. 10, the laser light source module S2 further includes: and the fifth collimating lens group 6, wherein the fifth collimating lens group 6 is positioned at the light-emitting side of the second dodging component 52.

The emergent laser of laser light source subassembly needs to close light through the through-hole of speculum and the emergent light of LED light source subassembly, and in order to make the final emergent facula of laser light source subassembly little enough, set up fifth collimating lens group 6 and further the collimation to the laser beam after the homogenization in the light-emitting side of second even light part 52 to the laser beam that makes the final emergent of laser light source subassembly can pass through-hole h as far as possible and be utilized.

The fifth collimating lens group 6 includes at least one lens, and in the embodiment of the present invention, the fifth collimating lens group 6 may include two lenses, which is not limited herein.

As shown in fig. 11, the projection system includes any of the light source devices 100 described above, an illumination optical path 200, a light valve modulation section 300, and a projection lens 400. The illumination light path 200 is located on the light emitting side of the light source device 100, the light valve modulation component 300 is located on the light emitting side of the illumination light path 200, and the projection lens 400 is located on the reflection light path of the light valve modulation component 300.

The light source device 100 comprises two light source components, namely an LED light source component and a laser light source component, the brightness of the laser light source component is larger than that of the LED light source component, the laser light source component is added in the light source device, monochromatic light emitted by the laser light source component and three-color light emitted by the LED light source component are combined, the light source device can be improved on the basis that the structure of the LED light source component is not changed, and the light emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the volume and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the volume and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly and the laser light source assembly.

The illumination optical path 200 is located on the light emitting side of the light source device 100, and the illumination optical path 200 collimates the light emitted from the light source device 100 and allows the light emitted from the light source device 100 to enter the light valve modulating member 300 at an appropriate angle. The illumination path 200 may include a plurality of lenses or lens groups, which are not limited herein.

The light valve modulating unit 300 is used to modulate and reflect the incident light. In an embodiment, the light valve modulating component 300 may employ a Digital Micromirror (DMD). After passing through the illumination optical path 200, the light beam conforms to the illumination size and incident angle required by the DMD. The DMD surface includes thousands of minute mirrors, each of which can be individually driven to deflect, and the reflected light is made incident on the projection lens 400 by controlling the deflection angle of the DMD.

The projection lens 400 is used for imaging the outgoing light from the light valve modulation unit 300, and is used for projection imaging after being imaged by the projection lens 400.

The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

According to the first inventive concept, a light source apparatus includes: LED light source subassembly, laser light source subassembly and first light subassembly that closes. The first light combination component combines three-color light emitted by the LED light source component and laser emitted by the laser light source component. The first light combination assembly comprises a reflection area and a through hole, the reflection area is used for reflecting the emergent light of the LED light source assembly to the set direction, the through hole is used for transmitting the emergent light of the laser light source assembly to the set direction, and therefore the laser light emitted by the three-color light emitted by the LED light source assembly and the laser light emitted by the laser light source assembly are combined. The brightness of the laser light source component is larger than that of the LED light source component, the laser light source component is added in the light source device, monochromatic light emitted by the laser light source component is combined with three-color light emitted by the LED light source component, the light source device can be improved on the basis of not changing the structure of the LED light source component, and the light emitting brightness of the light source device is increased; the laser light source has a larger color gamut, and the color expression capability can be effectively enhanced and the color gamut can be improved by adding the laser light source component in the light source device and adjusting the proportion of the laser light source to the LED light source; at present, the size and the energy consumption of common laser light sources are smaller than those of corresponding LED light sources, so that the size and the energy consumption of a light source device cannot be excessively increased by combining the LED light source assembly with the laser light source assembly.

According to a second inventive concept, a LED light source assembly comprises: the LED light source comprises a first LED light source, a second LED light source, a third LED light source and a second light combination component. The second light combining component is positioned at the intersection of the emergent light of each LED light source, and can combine the light with different colors emitted by each LED light source into white light to be emitted to the first light combining component.

According to a third inventive concept, the LED light source assembly further comprises: and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light with a second wave band. The fourth LED light source emits light of a third wave band to the second LED light source through the second light combining component, so that fluorescent powder in the second LED light source is excited to increase emission of light of the second wave band.

According to a fourth inventive concept, the laser light source assembly comprises at least one laser light source, the laser light source emits light in a first waveband, and the colors of the emitted light of the laser light source and the first LED light source are the same.

According to the fifth inventive concept, in order to increase the laser intensity, two or more laser light sources may be provided in the laser light source assembly. The laser light source can adopt a laser chip or a laser. And a converging lens group is arranged on the light emitting side of each laser light source to converge the laser emitted by each laser light source, so that the emergent light of each laser light source is combined into one laser spot.

According to the sixth inventive concept, the first LED light source employs a red LED, the second LED light source employs a green LED, and the third LED light source and the fourth LED light source employ blue LEDs. The laser light source adopts a red light laser chip or a red light laser.

According to a seventh inventive concept, the second light combining assembly includes: a first light-combining mirror and a second light-combining mirror. The first light combining mirror is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the third LED light source, and the first light combining mirror is used for transmitting the light of the third wave band and reflecting the light of the first wave band. The second light combining mirror is positioned at the intersection of the emergent light of the first light combining mirror and the emergent light of the second LED light source and the intersection of the emergent light of the second LED light source and the emergent light of the fourth LED light source, and the second light combining mirror is used for transmitting the light of the second wave band and reflecting the light of the first wave band and the light of the third wave band. The first light-combining mirror and the second light-combining mirror can both adopt dichroic mirrors.

According to the eighth inventive concept, the first light combining component employs a reflector, and the reflector includes a through hole. The reflector is used for reflecting the light of the first wave band, the light of the second wave band and the light of the third wave band, and the through hole is used for transmitting laser. The reflector has higher reflectivity to the three chromatic light of LED light source subassembly outgoing, and laser has higher collimation degree, and the facula size is less, sets up on the reflector through can transmitting laser to reach the purpose that LED three chromatic light closed with laser.

According to the ninth inventive concept, the through hole is located at the center of the reflector, and the connecting line of the center point of the reflector and the center point of the second light combining mirror is parallel to the light emitting direction of the second LED light source. The laser facula that the laser light source subassembly was sent out to the speculum is symmetrical about the central point of speculum, and the facula that LED light source subassembly was sent out on the speculum is symmetrical for the central point of speculum. Therefore, the laser spot is positioned in the center of the light combining spot, so that the energy distribution of the light combining spot is more uniform.

According to the tenth inventive concept, since the through hole transmits a part of the emergent light of the LED light source assembly to cause light loss, the size of the through hole is set as small as possible, so that the area of the through hole is smaller than or equal to 1/10 of the area of the emergent light spot of the LED light source assembly based on the laser light spot, thereby controlling the energy loss of the emergent light of the LED light source assembly transmitted by the through hole to be less than 10%. Since the laser light has a large energy with respect to the light emitted from the LED, the light loss can be compensated.

According to an eleventh inventive concept, the LED light source assembly further comprises: the lens comprises a first collimating lens group, a second collimating lens group, a third collimating lens group and a fourth collimating lens group. The first collimating lens group is positioned on the light-emitting side of the first LED light source; the second collimating lens group is positioned on the light-emitting side of the second LED light source; the third collimating lens group is positioned on the light-emitting side of the third LED light source; the fourth collimating lens group is positioned on the light-emitting side of the fourth LED light source. Because the emergent light of the LED light sources meets Lambert distribution and has a larger divergence angle, the emergent light of the LED light sources can be collimated and then emitted by arranging the collimating lens groups on the light emitting sides of the LED light sources.

According to a twelfth inventive concept, the LED light source assembly further comprises: and a beam shrinking lens group. The beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens. Because the optical paths of the emergent lights of the LED light sources before being combined are different, and the emergent light of the LED light sources has a certain divergence angle, the light path of the first LED light source and the third LED light source before being incident on the second light combining mirror is longer relative to the light path of the second LED light source before being incident on the second light combining mirror, and the light spot size after being dispersed is larger as the light path is longer, the combined light of the first LED light source and the third LED light source needs to be condensed by the beam condensing lens group before being incident on the second light combining mirror, so that the light spot size of the combined light of the first LED light source and the third LED light source is the same as possible as the light spot size of the second LED light source.

According to a thirteenth inventive concept, the LED light source assembly further comprises: and the first light homogenizing part is positioned on the light emergent side of the second light combining mirror. Correspondingly, the laser light source assembly further comprises: and the second dodging component is positioned on the light outlet side of the converging lens group. Even light parts are respectively arranged aiming at the light paths of the LED light source component and the laser light source component, the structure of the LED light source component is not required to be changed, and emergent light of the two light source components is uniform light beams. The first dodging component adopts a compound eye lens group, and the second dodging component can adopt a light guide pipe, a light bar and the like.

According to a fourteenth inventive concept, the laser light source assembly further includes: and the fifth collimating lens group is positioned on the light-emitting side of the second dodging component. The emergent laser of laser light source subassembly need close light through the through-hole of speculum and the emergent light of LED light source subassembly, and in order to make the final emergent facula of laser light source subassembly little enough, set up the further collimation of the laser beam after the fifth collimating lens group is homogenized in the light-emitting side of the even light part of second to the laser beam that makes the final emergent of laser light source subassembly can pass the through-hole as far as and be utilized.

According to a fifteenth inventive concept, a projection system includes any one of the light source devices described above, an illumination light path, a light valve modulating section, and a projection lens. The illumination light path is located on the light emitting side of the light source device, the light valve modulation component is located on the light emitting side of the illumination light path, and the projection lens is located on the reflection light path of the light valve modulation component. The projection system can obtain the required image quality after enhancing the color, the color gamut and the brightness by controlling the color ratio of the laser light source and the LED light source.

While preferred embodiments of the present invention have been described, additional variations and modifications in those embodiments may occur to those skilled in the art once they learn of the basic inventive concepts. Therefore, it is intended that the appended claims be interpreted as including preferred embodiments and all such alterations and modifications as fall within the scope of the invention.

It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.

Claims

1. A light source device, comprising:

an LED light source assembly; the LED light source component at least comprises: a first LED light source, a second LED light source and a third LED light source; the first LED light source emits light with a first wave band, the second LED light source emits light with a second wave band, and the third LED light source emits light with a third wave band;

the laser light source component is used for emitting laser of the first wave band;

the first light combining component is positioned at the intersection of the emergent light of the LED light source component and the emergent light of the laser light source component; the first light combination component comprises a reflection area and a through hole; the reflecting area is used for reflecting the emergent light of the LED light source assembly in the set direction, and the through hole is used for transmitting the emergent light of the laser light source assembly in the set direction.

2. The light source device according to claim 1, wherein the LED light source module further comprises:

a fourth LED light source; the fourth LED light source emits light of the third wavelength band, and the fourth LED light source is used for irradiating and exciting the second LED light source to emit light of the second wavelength band;

and the second light combining component is positioned at the intersection of the emergent light of each LED light source in the LED light source component and is used for combining the emergent light of each LED light source into light to be emitted to the first light combining component.

3. The light source device of claim 2, wherein the second light combining component comprises: a first light combining lens and a second light combining lens;

the first LED light source and the second LED light source are arranged in parallel, the first LED light source and the third LED light source are arranged vertically, and the second LED light source and the fourth LED light source are arranged vertically;

the first light combining mirror is positioned at the intersection of the emergent light of the first LED light source and the emergent light of the third LED light source, and the first light combining mirror is used for transmitting the light of the third wavelength band and reflecting the light of the first wavelength band;

the second light combining mirror is located at the intersection of the emergent light of the first light combining mirror and the emergent light of the second LED light source and the intersection of the emergent light of the second LED light source and the emergent light of the fourth LED light source, and the second light combining mirror is used for transmitting the light of the second waveband and reflecting the light of the first waveband and the light of the third waveband.

4. The light source device according to claim 3, wherein the LED light source module further comprises:

the first collimating lens group is positioned on the light emitting side of the first LED light source;

the second collimating lens group is positioned on the light emitting side of the second LED light source;

the third collimating lens group is positioned on the light emitting side of the third LED light source;

the fourth collimating lens group is positioned on the light emitting side of the fourth LED light source;

the beam-shrinking lens group is positioned between the first light-combining lens and the second light-combining lens;

and the first dodging component is positioned on the light emergent side of the second light combining mirror.

5. The light source device according to claim 1, wherein the laser light source module includes:

at least one laser light source for emitting laser light of the first wavelength band;

the converging lens group is positioned on the light-emitting side of the laser light source;

the second dodging component is positioned on the light emitting side of the converging lens group;

and the fifth collimating lens group is positioned on the light-emitting side of the second dodging component.

6. The light source device according to claim 5, wherein the first light combining component is a reflector, and the reflector includes a through hole; the reflector is used for reflecting the light of the first wave band, the second wave band and the third wave band, and the through hole is used for transmitting laser.

7. The light source device according to claim 6, wherein the through hole is located at a center of the reflector, and an area of the through hole is less than or equal to 1/10 of an area of an exit light spot of the LED light source assembly.

8. The light source device according to claim 4 or 5, wherein the first light unifying member is a fly's eye lens group, and the second light unifying member is a light guide or a light rod.

9. The light source device according to claim 2 or 5, wherein the light of the first wavelength band is red light, the light of the second wavelength band is green light, and the light of the third wavelength band is blue light;

the first LED light source is a red LED, the second LED light source is a green LED, and the third LED light source and the fourth LED light source are blue LEDs; the laser light source is a red light laser chip or a red light laser.

10. A projection system comprising the light source device according to any one of claims 1 to 9, an illumination optical path, a light valve modulation member, and a projection lens;

the illumination light path is positioned on the light emitting side of the light source device, the light valve modulation component is positioned on the light emitting side of the illumination light path, and the light valve modulation component is used for modulating and reflecting incident light; the projection lens is positioned on a reflection light path of the light valve modulation component and is used for imaging emergent light of the light valve modulation component.