CN115373199A

CN115373199A - Adjustable reflective ultrashort burnt 2LCD projector

Info

Publication number: CN115373199A
Application number: CN202210800243.8A
Authority: CN
Inventors: 不公告发明人
Original assignee: Shenzhen Kejinming Electronic Co Ltd
Current assignee: Shenzhen Kejinming Electronic Co Ltd
Priority date: 2022-07-08
Filing date: 2022-07-08
Publication date: 2022-11-22

Abstract

The invention relates to the technical field of projectors, in particular to an adjustable reflection type ultrashort-focus LCD projector which comprises a double-optical projection unit, wherein the double-optical projection unit is composed of a blue light unit and a yellow light unit, the blue light unit comprises a blue LED light source, a light condensing device, an incident light condensing lens, a blue incident polarizing plate, a black-white LCD, a blue emergent polarizing plate and a field lens, the yellow light unit comprises a yellow LED, a time-sharing color separator, a light condensing device, an incident light condensing lens, a black-white LCD, a field lens, a yellow incident polarizing plate and a yellow emergent polarizing plate, a dichroscope is arranged between the blue light unit and the yellow light unit, and a reflection type ultrashort-focus lens is further arranged on the side surface of the dichroscope. The projector adopts a 2LCD reflective ultra-short focus structure, two LCDs are used for projection, the transmittance of light is improved, the energy efficiency ratio is increased, the projection brightness is effectively enhanced, and the problem of low brightness of a single LCD is solved.

Description

Adjustable reflective ultrashort burnt 2LCD projector

Technical Field

The invention relates to the technical field of projectors, in particular to an adjustable reflective ultra-short-focus 2LCD projector.

Background

LCD projectors have reached a fairly high level in both brightness level and image fineness. In addition to high-end cinema products, LCD products maintain the brightness advantage of single-chip DLP products in common application products and low-end high-performance projector products.

The existing single LCD projector uses full-color LCD, and has low transmittance and poor energy efficiency; in addition, most of the adopted medium and long focal length lenses have large requirements on distance and space.

In order to solve the problems of low brightness and large projection space of a single LCD, a 2LCD reflective ultra-short focus structure is adopted for improvement.

Disclosure of Invention

The present invention provides an adjustable reflective ultra-short focus 2LCD projector to achieve the purpose of increasing the projection brightness and reducing the projection space, so as to solve the problems in the background art.

In order to achieve the purpose, the invention provides the following technical scheme: an adjustable reflection type ultrashort-focus 2LCD projector comprises a dual-optical projection unit, wherein the dual-optical projection unit is composed of a blue light unit and a yellow light unit, the blue light unit comprises a blue LED light source, a light condensing device, an incident light condenser, a blue incident polarizing plate, a black-and-white LCD, a blue emergent polarizing plate and a field lens, the yellow light unit comprises a yellow LED, a time-sharing color separator, the light condensing device, the incident light condenser, the black-and-white LCD, the field lens, a yellow incident polarizing plate and a yellow emergent polarizing plate, a dichroscope is arranged between the blue light unit and the yellow light unit, and a reflection type ultrashort-focus lens is further arranged on the side surface of the dichroscope.

Preferably, the blue LED light source is located on the light entrance side of the light collecting device, and the incident condenser lens is mounted on the end face of the light collecting device.

Preferably, the blue incident polarizing plate, the black-and-white LCD, the blue exit polarizing plate, and the field lens are sequentially arranged on a side surface of the incident condenser.

Preferably, the time-sharing color separator is connected with the yellow LED, and both the time-sharing color separator and the yellow LED are located on the light inlet side of the light condensing device, and the light condensing device, the incident light condensing lens, the black-and-white LCD, and the field lens arranged in the blue light unit and the yellow light unit have the same structure and specification.

Preferably, the yellow incident polarizing plate, the black-and-white LCD, the yellow exit polarizing plate, and the field lens are sequentially disposed on a side surface of the incident condenser.

Preferably, the blue light unit and the yellow light unit are arranged in a direction perpendicular to each other, and the dichroic mirror is arranged between the blue light unit and the yellow light unit in an inclined manner of 45 °.

Compared with the prior art, the invention has the beneficial effects that:

1. the projector adopts a 2LCD reflective ultra-short focus structure, and two LCDs are used for projection, so that the light transmittance is improved, the energy efficiency ratio is increased, the projection brightness is effectively enhanced, and the problem of low brightness of a single LCD is solved;

2. the reflective ultra-short-focus lens adopted by the invention has smaller requirements on space and distance, and can solve the problem of large projection space required by the traditional single LCD projector.

Drawings

FIG. 1 is a schematic diagram of the structure of the present invention;

FIG. 2 is a schematic diagram of a projection method according to the present invention.

In the figure: the system comprises a blue LED light source 1, a light condensing device 2, an incident condenser 3, a blue incident polarizing plate 4, a black-and-white LCD5, a blue emergent polarizing plate 6, a field lens 7, a yellow LED8, a time-sharing color separator 9, a yellow incident polarizing plate 10, a yellow emergent polarizing plate 11, a dichroscope 12 and a reflective ultra-short focus lens 13.

Detailed Description

The present invention is further described with reference to the accompanying drawings and the detailed description, and it should be noted that the embodiments or technical features described below may be arbitrarily combined to form a new embodiment without conflict, and it should be understood that the described embodiments are only a part of the embodiments, 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.

Referring to fig. 1 to fig. 2, the present invention provides a technical solution: an adjustable reflection type ultrashort-focus 2LCD projector comprises a double-optical projection unit, wherein the double-optical projection unit is composed of a blue light unit and a yellow light unit, the blue light unit comprises a blue LED light source 1, a light condensing device 2, an incident light condensing lens 3, a blue incident polarizing plate 4, a black-and-white LCD5, a blue emergent polarizing plate 6 and a field lens 7, the yellow light unit comprises a yellow LED8, a time-sharing color separator 9, the light condensing device 2, the incident light condensing lens 3, the black-and-white LCD5, the field lens 7, a yellow incident polarizing plate 10 and a yellow emergent polarizing plate 11, a dichroscope 12 is arranged between the blue light unit and the yellow light unit, and a reflection type ultrashort-focus lens 13 is further arranged on the side face of the dichroscope 12.

The projector adopts a double-optical projection unit structure, divides the original full-color single LCD into two parts of blue and red and green alternately, and has two LCDs for projection, thereby effectively enhancing the projection brightness;

the blue LED light source 1 is positioned on the light inlet side of the light condensing device 2, and the incident condenser lens 3 is arranged on the end surface of the light condensing device 2;

the blue light unit is mainly used for generating blue light, the blue light generated by the blue LED light source 1 is condensed by the condensing device 2 and the incident condenser 3, is irradiated on the blue incident polarizing plate 4, is acted on the black-and-white LCD5 after being polarized, and is irradiated on the dichromatic mirror 12 through the blue emergent polarizing plate 6 and the field lens 7, and can be reflected by the dichromatic mirror 12;

the blue incident polarizing plate 4, the black-and-white LCD5, the blue emergent polarizing plate 6 and the field lens 7 are sequentially arranged on the side surface of the incident condenser 3;

the time-sharing color separator 9 is connected with the yellow LED8, the time-sharing color separator 9 and the yellow LED8 are both positioned on the light inlet side of the light condensing device 2, and the light condensing device 2, the incident light condensing lens 3, the black-white LCD5 and the field lens 7 which are arranged in the blue light unit and the yellow light unit have the same structure and specification;

yellow light emitted by the yellow LED8 can generate alternate red and green light under the action of the time-sharing color separator 9, and is combined with blue light to carry out full-color display;

the yellow incident polarizing plate 10, the black-and-white LCD5, the yellow emergent polarizing plate 11 and the field lens 7 are sequentially arranged on the side surface of the incident condenser 3;

the red and green lights are also subjected to light condensation treatment by the light condensation device 2 and the incident light condensation lens 3, and are sequentially subjected to guide treatment by the yellow incident polarizing plate 10, the black and white LCD5, the yellow emergent polarizing plate 11 and the field lens 7, irradiated on the dichromatic mirror 12 and transmitted from the dichromatic mirror 12;

the blue light unit and the yellow light unit are arranged in a direction vertical to each other, and the dichromatic mirror 12 is obliquely arranged between the two at an angle of 45 degrees;

the blue light emitted by the blue light unit is reflected by the dichroscope 12, the alternate red and green light emitted by the yellow light unit is transmitted by the dichroscope 12, and finally full-color imaging can be performed on a screen, so that the brightness is stronger, and the projection space can be reduced due to the adoption of the reflective ultra-short focal lens 13;

when the invention is used: firstly, light emitted by a blue LED light source 1 is irradiated on a liquid crystal screen receiving a blue signal; the light emitted by the yellow LED8 passes through a time-lapse color separator 9 to perform red-green color alternate illumination according to time sequence; red and green lights are alternately illuminated on the LCD, and the image signals of the LCD are also red and green alternately and have the same time sequence with the light source; the blue light is reflected by the dichroic mirror 12, the red light and the green light are transmitted by the dichroic mirror 12, and finally the images are formed on a screen through the reflective ultra-short-focus lens 13, so that the projection work is completed.

The above embodiments are merely preferred embodiments of the present invention, and the scope of the present invention should not be limited thereto, and those skilled in the art will be able to make various modifications without inventive changes from the above concepts and the scope of the present invention.

Claims

1. An adjustable reflective ultrashort burnt 2LCD projector, including two optical projection units, its characterized in that: the dual-optical projection unit is composed of a blue light unit and a yellow light unit, the blue light unit comprises a blue LED light source (1), a light condensing device (2), an incident light condenser (3), a blue incident polarizing plate (4), a black-and-white LCD (5), a blue emergent polarizing plate (6) and a field lens (7), the yellow light unit comprises a yellow LED (8), a time-sharing color separator (9), a light condensing device (2), an incident light condenser (3), a black-and-white LCD (5), a field lens (7), a yellow incident polarizing plate (10) and a yellow emergent polarizing plate (11), a two-phase color mirror (12) is arranged between the blue light unit and the yellow light unit, and a reflective ultra-short focal lens (13) is further arranged on the side face of the two-phase color mirror (12).

2. The adjustable reflective ultra-short focus 2LCD projector as claimed in claim 1, wherein: the blue LED light source (1) is positioned on the light inlet side of the light gathering device (2), and the incident light gathering lens (3) is arranged on the end face of the light gathering device (2).

3. The adjustable reflective ultra-short focus 2LCD projector as claimed in claim 1, wherein: the blue incident polarizing plate (4), the black-and-white LCD (5), the blue emergent polarizing plate (6) and the field lens (7) are sequentially arranged on the side surface of the incident condenser (3).

4. The adjustable reflective ultra-short focus 2LCD projector as claimed in claim 1, wherein: the time-sharing color separator (9) is connected with the yellow LED (8), the time-sharing color separator (9) and the yellow LED (8) are both positioned on the light inlet side of the light condensing device (2), and the light condensing device (2), the incident light condensing lens (3), the black-and-white LCD (5) and the field lens (7) arranged in the blue light unit and the yellow light unit are identical in structure and specification.

5. The adjustable reflective ultra-short focus 2LCD projector as claimed in claim 1, wherein: the yellow incident polarizing plate (10), the black-and-white LCD (5), the yellow emergent polarizing plate (11) and the field lens (7) are sequentially arranged on the side face of the incident condenser (3).

6. The adjustable reflective ultra-short focus 2LCD projector as claimed in claim 1, wherein: the blue light unit and the yellow light unit are arranged in a direction perpendicular to each other, and a dichroscope (12) is obliquely arranged between the blue light unit and the yellow light unit at an angle of 45 degrees.