CN210181379U

CN210181379U - Light source optical path system of projector

Info

Publication number: CN210181379U
Application number: CN201921050095.2U
Authority: CN
Inventors: Jieyang Wu; 吴杰阳
Original assignee: Shenzhen Caiyi Photoelectric Technology Co Ltd
Current assignee: Shenzhen Caiyi Photoelectric Technology Co Ltd
Priority date: 2019-07-05
Filing date: 2019-07-05
Publication date: 2020-03-24
Anticipated expiration: 2029-07-05

Abstract

A projector light source optical system comprises a first blue light source for emitting first blue light, a yellow light source for emitting yellow light, a color separation element, a light integration component and an optical engine, wherein the color separation element is arranged at the intersection of the propagation paths of the first blue light and the yellow light so as to reflect the blue light and transmit the yellow light to generate mixed white light, the light integration component is arranged on the propagation path of the mixed white light to modulate the mixed white light, and the optical engine is arranged behind the light integration component on the propagation path of the mixed white light to receive the modulated mixed white light. Implement the utility model discloses a projector light source optical path system, simple structure, low cost just can reach the white light effect of ideal.

Description

Light source optical path system of projector

Technical Field

The utility model relates to an illumination projection system, more specifically say, relate to a projector light source optical path system.

Background

In the existing projection market, LED light sources are mainly used for micro-projection, mainly characterized by portability and low cost, and they occupy a considerable proportion of the market. The early white LED light source is mainly a three-color light source structure composed of three R/G/B LEDs. In the later period, in order to improve the brightness, the projector with an innovative R/G/B/B structure is on the market. The green light source used in the structure is a conversion type LED, blue light bombards the wavelength conversion component to generate green light, and the structure is achieved by closely attaching the third blue light source chip and the wavelength conversion component. Besides the green light LED, two third blue light sources are also included, and except that one blue light source is used for illuminating the display screen, the other blue light source is used for bombarding the green light wavelength conversion component, so that the green light output is further improved. However, it must adopt three color light sources and at least three sets of illumination paths, which makes the light source structure and the light path complicated and the cost is high.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the present invention is to provide a projector light source optical path system with simple structure, low cost and capable of achieving ideal white light effect, aiming at the above-mentioned defects of the prior art.

The utility model provides a technical scheme that its technical problem adopted is: a projector light source optical system is constructed, and comprises a first blue light source for emitting first blue light, a yellow light source for emitting yellow light, a color separation element, a light integration component and a light engine, wherein the color separation element is arranged at the intersection of the propagation paths of the first blue light and the yellow light so as to reflect the blue light and transmit the yellow light to generate mixed white light, the light integration component is arranged on the propagation path of the mixed white light so as to modulate the mixed white light, and the light engine is arranged after the light integration component in the propagation path of the mixed white light so as to receive the modulated mixed white light.

In the light path system of the projector, the yellow light source includes a yellow wavelength conversion element excited by blue light to generate yellow light.

In the projector light source optical path system of the present invention, the projector light source optical path system further includes a second blue light source for emitting a second blue light, the dichroic filter is disposed at the intersection of the first blue light, the second blue light and the yellow light propagation path, so as to reflect the second blue light to the yellow light source to excite the yellow wavelength conversion element.

In the light path system of projector, the yellow light source further includes a yellow wavelength conversion element, which is located at a position away from the third blue light source on one side of the dichroic element.

Projector light source optical path system in, first blue light source with second blue light source sets up along the vertical direction divide look component upper and lower both sides, the yellow light source with the light integral subassembly sets up respectively along the horizontal direction divide look component left and right sides, divide look component and horizontal direction to become 45 degrees angle settings.

In the projector light source optical path system of the present invention, the light integration component includes a compound eye component and a phase converter which are sequentially disposed on the propagation path of the mixed white light.

In the light source optical system of projector, the lens assembly is disposed between the first blue light source and the dichroic element, between the second blue light source and the dichroic element, and between the yellow light source and the dichroic element.

Projector light source optical path system in, compound eye subassembly includes first compound eye and the compound eye of second that the interval set up, the lens subassembly includes first convex lens and the convex lens of second that the interval set up.

Projector light source optical path system in, first blue light source second blue light source with third blue light source is blue light LED.

Implement the utility model discloses a projector light source optical path system, simple structure, low cost just can reach the white light effect of ideal. Furthermore, the yellow wavelength conversion element is bombarded by adopting two blue light sources, so that yellow light output can be further improved, and a better white light effect can be obtained.

Drawings

The invention will be further explained with reference to the drawings and examples, wherein:

fig. 1 is a schematic block diagram of a first embodiment of a projector light source optical path system according to the present invention;

fig. 2 is an optical path diagram of a second embodiment of the projector light source optical path system of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

The utility model relates to a projector light source optical path system, including the first blue light source that is used for launching first blue light, the yellow light source that is used for launching the yellow light, color separation component, light integral subassembly and ray apparatus, color separation component sets up first blue light with thereby the cross point reflection of the propagation path of yellow light blue light and transmission the yellow light is in order to generate mixed white light, the light integral subassembly sets up mix white light with the modulation on the propagation path of white light mix white light, the ray apparatus is in the propagation path of mixing white light sets up after the light integral subassembly with the receiving modulation mix white light. Implement the utility model discloses a projector light source optical path system, simple structure, low cost just can reach the white light effect of ideal.

Fig. 1 is a schematic block diagram of a first embodiment of a projector light source optical path system according to the present invention. As shown in fig. 1, the light source optical system of the projector of the present invention includes a first blue light source A3 for emitting first blue light, a yellow light source a1 for emitting yellow light, a color separation element a4, a light integration component T, and an optical machine a7, where the color separation element a4 is disposed at an intersection of propagation paths of the first blue light and the yellow light to reflect the blue light and transmit the yellow light to generate a mixed white light, the light integration component T is disposed on a propagation path of the mixed white light to modulate the mixed white light, and the optical machine a7 is disposed after the light integration component T to receive the modulated mixed white light.

In a preferred embodiment of the present invention, the first blue light source A3 may be a blue LED, and the yellow light source a1 may be a yellow LED, and may also include a blue LED and a yellow wavelength conversion element excited by blue light to generate yellow light. In a further preferred embodiment of the present invention, the yellow light source a1 may be a yellow wavelength converting element excited by blue light to generate yellow light, which may be excited by the first blue light source A3. The color separation element a4 can reflect or transmit the blue light or the yellow light depending on the wavelength thereof.

In the preferred embodiment of the present invention, the light integration component T may include a beam expanding component, a compound eye component, a phase converter, and the like. In the preferred embodiment of the present invention, the optical-mechanical module a7 can be any optical-mechanical module known in the art, and is not further limited herein.

Therefore, implement the utility model discloses a projector light source optical path system can directly adopt yellow light source and blue light source to generate white light through simple structure under the condition that need not ruddiness light source. Therefore, the utility model discloses a projector light source optical path system, simple structure, low cost just can reach the white light effect of ideal.

Fig. 2 is an optical path diagram of a second embodiment of the projector light source optical path system of the present invention. As shown in fig. 2, the light source optical system of the projector of the present invention includes a first blue light source A3 for emitting first blue light, a second blue light source a2 for emitting second blue light, a yellow light source a1 for emitting yellow light, a color separation element a4, a light integration component T, and an optical machine a 7.

In this embodiment, the yellow light source a1 includes a yellow wavelength conversion element excited by blue light to generate yellow light, and a third blue light source. The first, second, and third blue light sources A3, a2, and a blue LED. The color separation element a4 is disposed at an intersection of propagation paths of the first blue light, the second blue light, and the yellow light. As shown in fig. 2, in this embodiment, the first blue light source A3 and the second blue light source a2 are disposed on the upper and lower sides of the color separation element a4 along the vertical direction, the yellow light source a1 and the light integration component T are disposed on the left and right sides of the color separation element a4 along the horizontal direction, and the color separation element a4 is disposed at an angle of 45 degrees with respect to the horizontal direction. Convex lenses C1 and C2 are provided at intervals between the first blue light source A3 and the color separation element a4, between the second blue light source a2 and the color separation element a4, and between the yellow light source a1 and the color separation element a4, respectively. The yellow wavelength converting element of the yellow light source a1, which is excited by blue light to generate yellow light, is disposed near the color separation element a4, and the third blue light source thereof is disposed away from the color separation element a4 and emits third blue light toward the color separation element a 4.

Thus, when the blue light B3 emitted from the first blue light source A3 and traveling in the vertical direction travels to the color separation element a4, the blue light is reflected by the color separation element a4, and the yellow light is transmitted, so that the blue light is reflected toward the light integration component T in the horizontal direction. While the blue light B1 emitted by the second blue light source A3 traveling in the vertical direction, when traveling to the dichroic element a4, will be reflected in the horizontal direction toward the yellow light source a1 because the dichroic element a4 is blue light reflective, yellow light transmissive. At this time, the third blue light emitted from the blue LED in the yellow light source a1 and the blue light B1 reflected by the color separation element a4 are both irradiated to the yellow wavelength conversion element of the yellow light source a1, thereby generating highly efficient yellow light B2. The yellow light B2 travels in the horizontal direction toward the dichroic element a 4. Since the dichroic element a4 is blue light reflective, yellow light transmissive, yellow light B2 will be projected propagating towards the light integrating component T. Thus on the side of the dichroic element a4 facing the light integration component T, yellow light B2 and blue light B3 mix to generate a mixed white light. The mixed white light propagates in the horizontal direction towards the light integration component T.

As further shown in fig. 2, the light integration unit T includes a fly-eye unit T1 and a phase converter T2, which are sequentially disposed in a propagation path of the mixed white light. In the preferred embodiment shown in fig. 2, the compound eye assembly comprises a first compound eye and a second compound eye which are arranged at intervals. After being modulated by the light integration component T, the modulated mixed white light enters the light machine as a light source.

While the invention has been described with reference to specific embodiments, it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. A projector light source optical system is characterized by comprising a first blue light source for emitting first blue light, a yellow light source for emitting yellow light, a color separation element, a light integration component and an optical engine, wherein the color separation element is arranged at the intersection of the propagation paths of the first blue light and the yellow light so as to reflect the blue light and transmit the yellow light to generate mixed white light, the light integration component is arranged on the propagation path of the mixed white light to modulate the mixed white light, and the optical engine is arranged after the light integration component in the propagation path of the mixed white light to receive the modulated mixed white light.

2. The projector light source optical system as claimed in claim 1, wherein the yellow light source comprises a yellow wavelength converting element that is excited by blue light to produce yellow light.

3. The projector light source optical system as claimed in claim 2 further comprising a second blue light source for emitting a second blue light, wherein the dichroic element is disposed at an intersection of propagation paths of the first blue light, the second blue light and the yellow light to reflect the second blue light to the yellow light source to excite the yellow wavelength converting element.

4. The projector light source optical system of claim 3 wherein the yellow light source further comprises a third blue light source disposed on a side of the yellow wavelength converting element remote from the dichroic element.

5. The projector light source optical system as claimed in claim 4, wherein the first blue light source and the second blue light source are disposed on the upper and lower sides of the color separation element along a vertical direction, the yellow light source and the light integration assembly are disposed on the left and right sides of the color separation element along a horizontal direction, respectively, and the color separation element is disposed at an angle of 45 degrees with respect to the horizontal direction.

6. The projector light source optical system as recited in claim 5, wherein the light integration component comprises a fly-eye component and a phase converter sequentially disposed in a propagation path of the mixed white light.

7. The projector light source optical system as recited in claim 6 further comprising lens assemblies respectively disposed between the first blue light source and the dichroic filter, between the second blue light source and the dichroic filter, and between the yellow light source and the dichroic filter.

8. The projector light source optical system as recited in claim 7, wherein the fly-eye assembly comprises first and second fly-eyes spaced apart, and the lens assembly comprises first and second convex lenses spaced apart.

9. The projector light source optical system as recited in claim 8 wherein the first, second and third blue light sources are blue LEDs.