CN114995034A

CN114995034A - Projection system and projector

Info

Publication number: CN114995034A
Application number: CN202210679153.8A
Authority: CN
Inventors: 庞志斌; 李冰
Original assignee: Tianjin Hualai Technology Co Ltd
Current assignee: Tianjin Hualai Technology Co Ltd
Priority date: 2022-06-15
Filing date: 2022-06-15
Publication date: 2022-09-02

Abstract

The present invention provides a projection system and a projector, including: the light source assembly is used for acquiring light rays generated by the LED array, gathering the light rays generated by the LED array and projecting the gathered light rays onto the rear Fresnel lens to generate parallel light rays; the rear Fresnel lens is used for projecting parallel light rays to the LCD screen assembly; the LCD screen assembly is used for generating a video image according to the parallel light rays and projecting the video image onto the front Fresnel lens; the front Fresnel lens is used for gathering light rays on the video image to obtain a gathered video image, and the gathered video image is projected onto the first reflector; the first reflector is used for refracting the gathered video images to obtain refracted video images and refracting the refracted video images into the lens assembly; the lens assembly is used for amplifying the refracted video image in proportion to obtain an amplified video image, and projecting the amplified video image to a desktop after passing through the second reflector.

Description

Projection system and projector

Technical Field

The invention relates to the technical field of projectors, in particular to a projection system and a projector.

Background

With the rapid development of semiconductor technology, projectors such as Digital Light Processing (DLP) projectors and Liquid Crystal Display (LCD) projectors have been developed to improve the number of pixels and to reduce the size of the projectors, so as to meet the requirements of consumers on the quality of projected images and portability.

Because of the high cost of DLP projectors, LCD projectors are currently used. However, the LCD projector has low brightness, and the light loss is large in the projection process, so that the light utilization rate is low, and the user experience is poor.

Disclosure of Invention

In view of this, an object of the present invention is to provide a projection system of a projector and a projector, in which an LED array is used to increase brightness, and the LED array is gathered after parallel light is generated, so that light utilization rate can be improved, and user experience can be improved.

In a first aspect, an embodiment of the present invention provides a projection system, where the projection system includes an optical-mechanical assembly, where the optical-mechanical assembly includes a light source assembly, a rear fresnel lens, an LCD screen assembly, a front fresnel lens, a first reflector, a lens assembly, and a second reflector;

the light source assembly is used for acquiring light rays generated by the LED array, gathering the light rays generated by the LED array and projecting the gathered light rays onto the rear Fresnel lens to generate parallel light rays;

the rear Fresnel lens is used for projecting the parallel light rays to the LCD screen assembly;

the LCD screen assembly is used for generating a video image according to the parallel light rays and projecting the video image onto the front Fresnel lens;

the front Fresnel lens is used for gathering light rays on the video image to obtain a gathered video image, and projecting the gathered video image onto the first reflector;

the first reflector is used for refracting the gathered video images to obtain refracted video images and refracting the refracted video images into the lens assembly;

the lens assembly is used for amplifying the refracted video image in proportion to obtain an amplified video image, and projecting the amplified video image to a desktop after passing through the second reflector.

Further, the light source assembly comprises the LED array, a light cone assembly and a heat radiator, and the LED array is attached to the heat radiator;

the light cone assembly is used for gathering the light rays generated by the LED array and projecting the gathered light rays onto the rear Fresnel lens.

Further, the projection system further comprises an infrared emitter;

the infrared emitter is used for generating infrared rays through the infrared point-shaped light source and the grating lens.

Furthermore, the device also comprises a camera;

the camera is used for collecting image information, and identifying the image information through a finger position identification algorithm to obtain position information.

Furthermore, the rear Fresnel lens and the front Fresnel lens are both lenses formed by polyolefin material injection molding, and the rear Fresnel lens is fixed on the light cone assembly through screws.

In a second aspect, an embodiment of the present invention provides a projector, including the projection system as described above, where the projection system includes an LCD panel assembly, a lens assembly, and a second reflecting mirror, and the projector further includes a turbofan configured to dissipate heat of the LCD panel assembly, an axial fan configured to dissipate heat of a heat sink, and a housing;

and the LCD screen assembly is provided with a heat insulation film, and the axial flow fan is fixed on the radiator.

Further, the second mirror is mounted on the housing.

Further, still include the core plate, core plate and LCD screen subassembly pass through FPC patchcord and connect.

Furthermore, the lens module further comprises a motor component, and the motor component is fixed on the lens component through a screw.

Furthermore, the loudspeaker is fixed on the shell through screws.

The embodiment of the invention provides a projection system and a projector, comprising: the optical-mechanical assembly comprises a light source assembly, a rear Fresnel lens, an LCD screen assembly, a front Fresnel lens, a first reflector, a lens assembly and a second reflector; the light source assembly is used for acquiring light rays generated by the LED array, gathering the light rays generated by the LED array and projecting the gathered light rays onto the rear Fresnel lens to generate parallel light rays; the rear Fresnel lens is used for projecting parallel rays to the LCD screen assembly; the LCD screen assembly is used for generating a video image according to the parallel light rays and projecting the video image onto the front Fresnel lens; the front Fresnel lens is used for gathering light rays on the video image to obtain a gathered video image, and the gathered video image is projected onto the first reflector; the first reflector is used for refracting the gathered video images to obtain refracted video images and refracting the refracted video images into the lens assembly; the lens assembly is used for amplifying the refracted video image in proportion to obtain an amplified video image, and projecting the amplified video image to a desktop after passing through the second reflector; the LED array is adopted to enable the brightness to be high, and the LED array is gathered after parallel light rays are generated, so that the light ray utilization rate can be improved, and the user experience is improved.

Additional features and advantages of the invention will be set forth in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. The objectives and other advantages of the invention will be realized and attained by the structure particularly pointed out in the written description and claims hereof as well as the appended drawings.

In order to make the aforementioned and other objects, features and advantages of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of a projection system according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a projector according to a second embodiment of the present invention;

fig. 3 is an exploded view of a projector according to a second embodiment of the present invention;

fig. 4 is a front view of a projector according to a second embodiment of the present invention.

An icon:

11-a light source assembly; 12-rear fresnel lens; 13-an LCD panel assembly; 14-front fresnel lens; 15-a first mirror; 16-a lens assembly; 17-a second mirror; 18-a light cone assembly; 19-a heat sink; 20-a camera; 21-a turbofan; 22-axial fan; 23-a housing; 24-core plates; 25-a motor assembly; 26-a loudspeaker; 27-a power panel; 28-laser.

Detailed Description

To make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings, and it is apparent that the described embodiments are some, but not all embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

For the understanding of the present embodiment, the following detailed description will be given of the embodiments of the present invention.

The first embodiment is as follows:

fig. 1 is a schematic view of a projection system according to an embodiment of the invention.

Referring to fig. 1, the projection system includes an optical-mechanical assembly including a light source assembly 11, a rear fresnel lens 12, an LCD screen assembly 13, a front fresnel lens 14, a first reflecting mirror 15, a lens assembly 16, and a second reflecting mirror 17;

the light source assembly 11 is used for acquiring light rays generated by the LED array, gathering the light rays generated by the LED array, and projecting the gathered light rays onto the rear fresnel lens 12 to generate parallel light rays;

a rear fresnel lens 12 for projecting parallel light rays to an LCD panel assembly 13;

here, the rear fresnel lens 12 may project parallel light rays onto a 4.5 inch 1080P LCD panel assembly 13.

The LCD screen assembly 13 is used for generating a video image according to the parallel light rays and projecting the video image onto the front Fresnel lens 14;

the front Fresnel lens 14 is used for gathering light rays on the video image to obtain a gathered video image, and projecting the gathered video image onto the first reflector 15;

the first reflector 15 is configured to refract the gathered video image to obtain a refracted video image, and refract the refracted video image into the lens assembly 16;

and the lens assembly 16 is used for amplifying the refracted video image in proportion to obtain an amplified video image, and projecting the amplified video image to a desktop after passing through the second reflecting mirror 17. Wherein the lens assembly 16 includes 5 aspheric lenses.

Here, when the enlarged video image is projected onto the table surface via the second reflecting mirror 17, a 10-inch image can be formed.

Further, the light source assembly 11 includes an LED array, a light cone assembly and a heat sink, and the LED array is attached to the heat sink;

and the light cone assembly is used for gathering the light generated by the LED array and projecting the gathered light onto the rear Fresnel lens 12.

Here, the light source part is an LED array with 50W power, and the light cone assembly has a trapezoidal three-dimensional structure with a small bottom and a large top, so that light can be made lossless to the greatest extent.

Further, the projection system further comprises an infrared emitter;

and the infrared emitter is used for generating infrared rays through the infrared point-shaped light source and the grating lens.

Here, the infrared emitter is provided at the bottom of the front end of the projector, and forms an infrared ray of 1mm line width of 1m unit right in front of the body.

Furthermore, the device also comprises a camera;

and the camera is used for acquiring image information and identifying the image information through a finger position identification algorithm to obtain position information.

The camera acquires the image information, and outputs the image information as the input of the finger position recognition algorithm to obtain the position information, so that the user experience of image touch can be realized.

Furthermore, the rear Fresnel lens and the front Fresnel lens are both lenses formed by injecting and pressing polyolefin materials, and the rear Fresnel lens is fixed on the light cone assembly through screws. The rear Fresnel lens and the front Fresnel lens are assembled relatively through threads, the rear Fresnel lens is used for providing uniform parallel light, the front Fresnel lens is used for converging light rays on a video image, and the received light rays are converged on a screen picture after being in bright colors.

In addition, one surface of the lens surface of the Fresnel lens (Fresnel lens) is a smooth surface, and the other surface is recorded with concentric circles from small to large; the texture of the lens is designed by utilizing the interference and the disturbance of light and according to the requirements of relative sensitivity and receiving angle, the requirement on the lens is very high, and a piece of high-quality lens has to be smooth in surface and clear in texture.

An embodiment of the present invention provides a projection system, including: the optical-mechanical assembly comprises a light source assembly, a rear Fresnel lens, an LCD screen assembly, a front Fresnel lens, a first reflector, a lens assembly and a second reflector; the light source assembly is used for acquiring light rays generated by the LED array, gathering the light rays generated by the LED array and projecting the gathered light rays onto the rear Fresnel lens to generate parallel light rays; the rear Fresnel lens is used for projecting parallel light rays to the LCD screen assembly; the LCD screen assembly is used for generating a video image according to the parallel light rays and projecting the video image onto the front Fresnel lens; the front Fresnel lens is used for gathering light rays on the video image to obtain a gathered video image, and the gathered video image is projected onto the first reflector; the first reflector is used for refracting the gathered video images to obtain refracted video images and refracting the refracted video images into the lens assembly; the lens assembly is used for amplifying the refracted video image in proportion to obtain an amplified video image, and projecting the amplified video image to a desktop after passing through the second reflector; the LED array is adopted to enable the brightness to be high, and the LED array is gathered after parallel light rays are generated, so that the light ray utilization rate can be improved, and the user experience is improved.

Example two:

fig. 2 is a schematic structural diagram of a projector according to a second embodiment of the present invention.

Referring to fig. 2, the projector includes the projection system as described above, the projection system including the LCD panel assembly 13, the lens assembly 16, and the second reflecting mirror 17, the projector further including a turbo fan 21 for dissipating heat from the LCD panel assembly 13, an axial flow fan 22 for dissipating heat from the heat sink 19, and a housing 23;

wherein, the LCD screen assembly 13 is provided with a heat insulation film, and the axial flow fan 22 is fixed on the radiator 19.

Here, the heat dissipation performance is important for the projector, so the heat dissipation performance and the fan for the light source should ensure the temperature control and the wind noise as small as possible, and the turbo fan 21 is mainly used to cool down the LCD panel assembly 13, and the heat insulation film on the LCD panel assembly 13 is also used to reduce the risk of screen burning to the maximum extent.

Further, referring to fig. 3 and 4, the second reflecting mirror 17 is mounted on the housing 23, and the laser 28 is fixed on the housing 23; the heat sink 19 is fixed to the housing 23 by a heat dissipating support; the light source LED board is fixed on the radiator 19; the light cone assembly 18 is in close fit with the LED array; the light cone assembly 18 is fixed on the closed light path by screws.

Further, the projection system further comprises a light source assembly, a rear fresnel lens 12, a front fresnel lens 14, a first reflecting mirror 15 and a second reflecting mirror 17; the light source assembly comprises an LED array, a light cone assembly 18 and a heat sink 19;

wherein, the rear Fresnel lens 12 is fixed on the light cone component 18 through screws; the LCD screen assembly 13 is fixed on the closed light path through screws; the turbo fan 21 is mounted on the closed light path by screws; the front Fresnel lens 14 is fixed on the closed light path through screws; the first reflector 15 is installed on the closed light path; the second reflector 17 is mounted on the housing 23.

Further, the projector also comprises a core board 24, a motor assembly 25, a loudspeaker 26 and a power supply board 27, wherein the core board 24 is connected with the LCD screen assembly 13 through FPC flexible wires; the motor assembly 25 is fixed on the lens assembly 16 through screws; the lens assembly 16 is fixed on the closed light path through a screw; the camera 20 is fixed on the outer wall of the closed light path through a screw; the power supply board 27 and the core board 24 are fixed on the outer wall of the closed light path through screws; the horn 26 is fixed to the housing 23 by screws.

The computer program product provided in the embodiment of the present invention includes a computer-readable storage medium storing a program code, where instructions included in the program code may be used to execute the method described in the foregoing method embodiment, and specific implementation may refer to the method embodiment, which is not described herein again.

It is clear to those skilled in the art that, for convenience and brevity of description, the specific working processes of the system and the apparatus described above may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

In addition, in the description of the embodiments of the present invention, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The functions, if implemented in the form of software functional units and sold or used as a stand-alone product, may be stored in a computer readable storage medium. Based on such understanding, the technical solution of the present invention may be embodied in the form of a software product, which is stored in a storage medium and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device) to execute all or part of the steps of the method according to the embodiments of the present invention. And the aforementioned storage medium includes: a U-disk, a removable hard disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), a magnetic disk, or an optical disk, and various media capable of storing program codes.

In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

Finally, it should be noted that: the above-mentioned embodiments are only specific embodiments of the present invention, which are used for illustrating the technical solutions of the present invention and not for limiting the same, and the protection scope of the present invention is not limited thereto, although the present invention is described in detail with reference to the foregoing embodiments, those skilled in the art should understand that: those skilled in the art can still make modifications or changes to the embodiments described in the foregoing embodiments, or make equivalent substitutions for some features, within the scope of the disclosure; such modifications, changes or substitutions do not depart from the spirit and scope of the embodiments of the present invention, and they should be construed as being included therein. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.

Claims

1. A projection system is characterized by comprising an optical-mechanical assembly, wherein the optical-mechanical assembly comprises a light source assembly, a rear Fresnel lens, an LCD screen assembly, a front Fresnel lens, a first reflector, a lens assembly and a second reflector;

2. The projection system of claim 1, wherein the light source assembly comprises the LED array, a light cone assembly, and a heat sink, the LED array being attached to the heat sink;

3. The projection system of claim 1, wherein the projection system further comprises an infrared emitter;

4. The projection system of claim 1, further comprising a camera;

5. The projection system of claim 2, wherein the rear fresnel lens and the front fresnel lens are both injection-molded lenses made of polyolefin material, and the rear fresnel lens is fixed on the light cone assembly by screws.

6. A projector comprising the projection system of any of claims 1 to 5, the projection system comprising an LCD panel assembly, a lens assembly, and a second mirror, the projector further comprising a turbofan for dissipating heat from the LCD panel assembly, an axial fan for dissipating heat from a heat sink, and a housing;

7. The projector of claim 6 wherein the second mirror is mounted on the housing.

8. The projector as claimed in claim 6, further comprising a core board, wherein the core board and the LCD panel assembly are connected by FPC cords.

9. The projector of claim 6 further comprising a motor assembly, the motor assembly being secured to the lens assembly by screws.

10. The projector of claim 6 further comprising a horn, the horn being secured to the housing by a screw.