CN113238441A

CN113238441A - Projection optical engine capable of turning image by 90 degrees and projector

Info

Publication number: CN113238441A
Application number: CN202110528490.2A
Authority: CN
Inventors: 郭鹏; 张军; 张鹏; 梁惠景; 费玲
Original assignee: Jinan Yunying Media Technology Co ltd
Current assignee: Jinan Yunying Media Technology Co ltd
Priority date: 2021-05-14
Filing date: 2021-05-14
Publication date: 2021-08-10

Abstract

The invention discloses a projection optical engine and a projector capable of turning images by 90 degrees, and mainly relates to the technical field of optical projection; the system comprises a light source system, an X prism, a relay system, an optical integrating rod, a first rotating mechanism for driving the optical integrating rod to rotate, a PBS prism, an LCos display screen and a second rotating mechanism for driving the LCos display screen to rotate; the light emitted by the light source system enters the relay system after being emitted by the X prism, is transmitted and restrained by the relay system, then is converged at a certain angle to enter the optical integrating rod, and then is emitted by the optical integrating rod to form a rectangular light source; after the rectangular light source enters the PBS prism, P polarized light is transmitted, and S polarized light is reflected and irradiated on the LCos display screen; the invention can turn the horizontal picture by 90 degrees to realize vertical projection, has long service life and is convenient to adjust.

Description

Projection optical engine capable of turning image by 90 degrees and projector

Technical Field

The invention relates to the technical field of optical projection, in particular to a projection optical engine capable of turning an image by 90 degrees and a projector.

Background

There is a need in many scenarios in the retail industry for a digital signage that displays vertically (typically 9: 16). The traditional projector has two main modes of vertical display, one mode is that the vertical part of a horizontal screen picture is used for picture display, and the rest part of the horizontal screen picture displays a black field, so that a large number of pixels are wasted, the display resolution is reduced, meanwhile, the black field pixels are always in an off state to bear larger heat load, and the pixels are likely to be damaged after long-time use; there is also a method of vertically mounting the projector or mounting the projector on a side wall, but this method is limited in use space and is not flexible enough.

Disclosure of Invention

The invention aims to solve the problems in the prior art, and provides a projection optical engine and a projector capable of turning an image by 90 degrees, which can turn a horizontal picture by 90 degrees to realize vertical projection, and have the advantages of long service life and convenience in adjustment.

In order to achieve the purpose, the invention is realized by the following technical scheme:

a projection optical engine capable of turning images by 90 degrees comprises a light source system, an X prism, a relay system, an optical integrating rod, a first rotating mechanism for driving the optical integrating rod to rotate, a PBS prism, an LCos display screen and a second rotating mechanism for driving the LCos display screen to rotate;

the light emitted by the light source system enters the relay system after being emitted by the X prism, is transmitted and restrained by the relay system, then is converged at a certain angle to enter the optical integrating rod, and then is emitted by the optical integrating rod to form a rectangular light source;

after the rectangular light source enters the PBS prism, P polarized light is transmitted, and S polarized light is reflected and irradiated on the LCos display screen.

Preferably, the light source system comprises a blue light LED, a red light LED and a green light LED, and light rays emitted by the blue light LED, the red light LED and the green light LED enter the X prism after passing through the corresponding collimation systems.

Preferably, the collimation system is a collimation lens arranged between the blue light LED and the X prism, between the red light LED and the X prism, and between the green light LED and the X prism.

Preferably, the relay system is a relay lens disposed between the X-prism and the optical integration rod.

Preferably, a radiator is arranged on the LCos display screen.

Preferably, the first rotating mechanism comprises a first motor, a first gear installed on the first motor, a second gear engaged with the first gear, a bearing seat installed on the housing of the optical engine, and a first limit switch, wherein a first bearing is arranged in the bearing seat, the second gear is fixed in an inner ring of the first bearing, a mounting hole adapted to the optical integrating rod is formed in the middle of the second gear, and a main optical axis of the optical integrating rod coincides with the axes of the second gear and the first bearing.

Preferably, the second rotating mechanism comprises a second motor, a third gear installed on the second motor, a rotating bracket and a second limit switch, the LCos display screen is installed on the rotating bracket, the rotating bracket is rotatably connected with the shell of the optical engine through a second bearing, and the rotating bracket is provided with meshing teeth meshed with the third gear.

Preferably, the radiator is installed on the rotating support through a shaft shoulder screw, a spring is sleeved on the shaft shoulder screw, and the spring is located on one side, far away from the rotating support, of the radiator.

A projector adopts the projection optical engine capable of turning images by 90 degrees.

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

light emitted by the light source system enters the relay system after being emitted by the X prism, is transmitted and restrained by the relay system, then is converged at a certain angle to enter the optical integrating rod, and then is emitted by the optical integrating rod to form a rectangular light source; the optical integrator rod is used for homogenizing and shaping the light source, the light rays are reflected for a plurality of times in the optical integrator rod, and a rectangular uniform light source with a specific proportion is formed after the light rays are emitted; the rectangular light source enters the PBS prism, P polarized light of the rectangular light source penetrates through the PBS prism, S polarized light is reflected and irradiates on the LCos display screen, the rectangular light source has a certain overflow size relative to the LCos display screen, and the illumination light source can cover the complete LCos display screen; the light source can be modulated by LCos, and the bright state enters the lens through PBS in a way of P light emergence, and finally the picture is presented; if the image needs to be turned over by 90 degrees, the shaping optical device and the image modulator only need to be rotated by 90 degrees along the optical axis of the main ray, the optical integrating rod is used as the shaping optical device, and after the optical integrating rod is rotated by 90 degrees, the rectangular light source at the rear end rotates along with the optical integrating rod; the LCos display screen rotates 90 degrees, can be consistent with the length and width directions of the rectangular light source, can modulate an image after rotating 90 degrees, can turn a horizontal picture (16:9) by 90 degrees to realize vertical projection (9:16), and has long service life and convenient adjustment.

Drawings

FIG. 1 is a diagram of an optical engine architecture of the present invention;

fig. 2 is a schematic structural view of a first rotating mechanism;

fig. 3 is a schematic structural diagram of a second rotating mechanism.

The reference numbers in the drawings: 1. an X prism; 2. a relay system; 3. an optical integrator rod; 4. a PBS prism; 5. an LCos display screen; 6. a lens; 61. a blue LED; 62. a red LED; 63. a green LED; 64. a collimating system; 7. a heat sink; 71. a shoulder screw; 72. a spring; 81. a first motor; 82. a first gear; 83. a second gear; 84. a bearing seat; 85. a first limit switch; 9. a housing; 91. a second motor; 92. a third gear; 93. rotating the bracket; 94. meshing teeth; 95. a gasket; 96. and (7) a PCB board.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and these equivalents also fall within the scope of the present application.

Example 1: as shown in fig. 1-3, the present invention is a projection optical engine capable of turning an image by 90 °, and the projection optical engine includes a light source system, an X-prism 1, a relay system 2, an optical integrator rod 3, a first rotating mechanism for driving the optical integrator rod 3 to rotate, a PBS prism 4, an LCos display screen 5, and a second rotating mechanism for driving the LCos display screen 5 to rotate;

specifically, the light source system includes a blue LED61, a red LED62, and a green LED63, as shown in fig. 1, the blue LED61 may be disposed on the left side of the X prism 1, the red LED62 is disposed on the lower side of the X prism 1, the green LED63 is disposed on the upper side of the X prism 1, the collimating system 64 is a collimating lens disposed between the blue LED61 and the X prism 1, between the red LED62 and the X prism 1, and between the green LED63 and the X prism 1, collimating lenses are disposed between the blue LED61 and the X prism 1, between the red LED62 and the X prism 1, and between the green LED63 and the X prism 1, and the blue LED61, the red LED62, and the green LED63 realize parallel light entering of the X prism 1 through the collimating system, and the X prism 1 functions to realize light combination (blue light transmission and red and green light reflection) of the trichromatic LEDs.

The relay system 2 is a relay lens disposed between the X-prism 1 and the optical integrator rod 3.

And a radiator 7 is arranged on the LCos display screen 5.

The three paths of LEDs realize that light rays enter the X prism 1 in parallel through the collimation system 64, the light rays enter the relay system 2 after being emitted through the X prism 1, and the light rays are transmitted and restrained and then converged at a certain angle to enter the optical integrator rod 3; the optical integrator rod 3 is used for homogenizing and shaping the light source, the light rays are reflected for a plurality of times in the optical integrator rod, and a rectangular uniform light source with a specific proportion is formed after the light rays are emitted; the rectangular light source enters the PBS prism 4, P polarized light of the rectangular light source penetrates through the PBS prism, S polarized light is reflected and irradiates the LCos display screen 5, the rectangular light source has a certain overflow size relative to the LCos display screen 5, and the illumination light source can cover the complete LCos display screen 5; the light source can be modulated by LCos, and the bright state penetrates through the PBS prism 4 to enter the lens 6 in a P light emergent mode, and finally the picture is displayed; if the image is to be turned over by 90 degrees, the shaping optical device and the image modulator are rotated by 90 degrees along the optical axis of the principal ray, the optical integrating rod 3 serves as the shaping optical device, and after the optical integrating rod is rotated by 90 degrees, the rear-end rectangular light source rotates along with the optical integrating rod; the LCos display 5 serves as an image modulator, and can be rotated by 90 ° to match the length and width directions of the rectangular light source, and can modulate an image rotated by 90 °.

The invention can turn the horizontal picture (16:9) by 90 degrees to realize vertical projection (9:16), has long service life and convenient adjustment.

Preferably, as shown in fig. 2, the first rotating mechanism includes a first motor 81, a first gear 82 mounted on the first motor 81, a second gear 83 engaged with the first gear 82, a bearing seat 84 mounted on the housing of the optical engine, and a first limit switch 85, a first bearing is disposed in the bearing seat 84, the second gear 83 is fixed in an inner ring of the first bearing, a mounting hole adapted to the optical integrating rod 3 is disposed in a middle portion of the second gear 83, a main optical axis of the optical integrating rod 3 coincides with the second gear 83 and an axis of the first bearing, the optical integrating rod 3 is rectangular in shape, the mounting hole is a square hole, the optical integrating rod 3 is mounted in the square hole in the middle of the second gear 83, the first bearing is a precision bearing, one end of the second gear 83 is provided with a rotating shaft integrated with the gear, the rotating shaft is fixed in the inner ring of the first bearing, the first bearing is arranged in the bearing seat 84, the bearing seat 84 is fixed on the shell of the optical engine, the parts need to be precisely machined, so that the main optical axis of the optical integration rod 3 coincides with the axes of the gear and the bearing, when the first motor 81 drives the gear pair to rotate in a meshed mode, the optical integration rod 3 rotates along with the rotation of the second gear 83, and when the optical integration rod 3 rotates to the 90-degree limit position, the optical integration rod contacts the first limit switch 85, and the power supply of the first motor 81 can be disconnected.

Preferably, as shown in fig. 3, the second rotating mechanism includes a second motor 91, a third gear 92 mounted on the second motor 91, a rotating bracket 93, and a second limit switch, the LCos display 5 is mounted on the rotating bracket 93, the rotating bracket 93 is rotatably connected to the housing of the optical engine through a second bearing, the rotating bracket 93 is provided with engaging teeth 94 engaged with the third gear 92, the second bearing can adopt a precision bearing, the housing 9 of the optical engine is used as a fixed reference, the housing 9 is fixed to an outer ring of the second bearing, an inner ring of the second bearing is fixed to the rotating bracket 93, the upper portion of the rotating bracket 93 is provided with engaging teeth 94, the engaging teeth 94 are engaged with the third gear 92, when the second motor 91 is operated, the engaging movement of the gear pair can make the components fixed on the rotating bracket 93 rotate around the center of the LCos display 5, when the LCos display 5 rotates to a predetermined vertical position, trigger the second limit switch and prevent that the subassembly from continuing to rotate, it is further, for guaranteeing that LCos display screen and radiator can well laminate, guarantee heat dispersion, radiator 7 passes through shoulder screw 71 and installs on runing rest 93, the cover is equipped with spring 72 on the shoulder screw 71, spring 72 is located radiator 7 and keeps away from runing rest 93's one side, presses radiator 7, LCos display screen 5, PCB board 96, sealed pad 95 on runing rest 93 through shoulder screw 71 who takes spring 72, and when runing rest 93 was rotatory like this, LCos display screen 5 just can rotate with radiator 7 synchronization.

Example 2: the invention relates to a projector, wherein the optical engine of the projector adopts the projection optical engine which can turn images by 90 degrees in the embodiment 1.

Claims

1. A projection optical engine capable of 90 ° image reversal, comprising: the system comprises a light source system, an X prism (1), a relay system (2), an optical integrating rod (3), a first rotating mechanism for driving the optical integrating rod (3) to rotate, a PBS prism (4), an LCos display screen (5) and a second rotating mechanism for driving the LCos display screen (5) to rotate;

light emitted by the light source system is emitted by the X prism (1) and enters the relay system (2), the light is transmitted and restrained by the relay system (2), and then is converged at a certain angle and enters the optical integrating rod (3), and then is emitted by the optical integrating rod (3) to form a rectangular light source;

after entering the PBS prism (4), the rectangular light source transmits P polarized light, and S polarized light is reflected and irradiated on the LCos display screen (5).

2. A projection optical engine for 90 ° flip images according to claim 1, wherein: the light source system comprises a blue light LED (61), a red light LED (62) and a green light LED (63), and light rays emitted by the blue light LED (61), the red light LED (62) and the green light LED (63) enter the X prism (1) after passing through corresponding collimation systems (64).

3. A projection optical engine for 90 ° flip images according to claim 2, wherein: the collimation system (64) is a collimation lens arranged between the blue light LED (61) and the X prism (1), between the red light LED (62) and the X prism (1) and between the green light LED (63) and the X prism (1).

4. A projection optical engine for 90 ° flip images according to claim 1, wherein: the relay system (2) is a relay lens arranged between the X prism (1) and the optical integrating rod (3).

5. A projection optical engine for 90 ° flip images according to claim 1, wherein: and a radiator (7) is arranged on the LCos display screen (5).

6. A projection optical engine for 90 ° flip images according to claim 1, wherein: first rotary mechanism includes first motor (81), installs first gear (82) on first motor (81), with second gear (83) of first gear (82) meshing, install bearing frame (84), first limit switch (85) on the casing of optical engine, be equipped with first bearing in bearing frame (84), second gear (83) are fixed in the inner circle of first bearing, the middle part of second gear (83) is equipped with the mounting hole that suits with optics integrating rod (3), the main optical axis of optics integrating rod (3) and second gear (83), the axle center coincidence of first bearing.

7. A projection optical engine for 90 ° flip images according to claim 5, wherein: the second rotating mechanism comprises a second motor (91), a third gear (92) installed on the second motor (91), a rotating support (93) and a second limit switch, the LCos display screen (5) is installed on the rotating support (93), the rotating support (93) is rotatably connected with the shell of the optical engine through a second bearing, and meshing teeth (94) meshed with the third gear (92) are arranged on the rotating support (93).

8. A projection optical engine for 90 ° flip images according to claim 7, wherein: radiator (7) are installed on runing rest (93) through shaft shoulder screw (71), the cover is equipped with spring (72) on shaft shoulder screw (71), spring (72) are located radiator (7) and keep away from the one side of runing rest (93).

9. A projector, characterized in that: a projection optical engine employing the 90 ° flip image of any of claims 1-8.