CN216160968U

CN216160968U - LCOS chip laser projection system

Info

Publication number: CN216160968U
Application number: CN202122292386.6U
Authority: CN
Inventors: 岳德举; 饶钦和; 李衡; 常绍泽
Original assignee: Guangdong Lianda Photoelectricity Co ltd
Current assignee: Guangdong Lianda Photoelectricity Co ltd
Priority date: 2021-09-22
Filing date: 2021-09-22
Publication date: 2022-04-01
Anticipated expiration: 2031-09-22

Abstract

The utility model discloses a LCOS chip laser projection system, which comprises a laser light source, wherein a static diffusion component for diffusing light beams, a dynamic diffusion component for diffusing light beams, a collimation component for collimating light beams, and a light splitting component for transmitting P light and reflecting S light downwards are sequentially arranged in front of the laser light source, an LCOS chip is arranged below the light splitting component, a projection lens and a screen are sequentially arranged above the light splitting component, and a light condensing component for condensing light and a light homogenizing component for homogenizing light are arranged between the static diffusion component and the collimation component. The utility model has the advantages of simple structure, low cost, few elements, good projection effect and high efficiency, the combination of the laser light source and the LCOS chip is an ideal combination, the conversion of P light is not needed, and the light efficiency is high.

Description

LCOS chip laser projection system

Technical Field

The utility model relates to the technical field of laser projection, in particular to a LCOS chip laser projection system.

Background

Lcos (Liquid crystal on Silicon) display device is a new type of reflective projection display device, which uses semiconductor Silicon technology to control Liquid crystal and project color images. Compared with the conventional display technologies, such as transmissive lcd (liquid Crystal display) and dlp (digital Light processing), the Lcos display device has the advantages of high Light utilization rate, small size, high aperture ratio, and the like, and can easily realize high resolution and sufficient color expression. With the development of future technologies, Lcos display devices will be a favorable competitor to LCD and DLP technologies.

S light: the polarization vector of the light is perpendicular to the plane of the incident and reflected light. P light: the polarization vector of the light is in the plane of the incident and reflected light. And the polarization beam splitter Prism (PBS) can divide incident unpolarized light into two vertical linearly polarized lights, wherein the P light completely passes through the PBS, the S light is reflected at an angle of 45 degrees, and the emergent direction of the PBS and the P light form an angle of 90 degrees. The Polarization Beam Splitter (PBS) is generally formed by gluing or gluing the hypotenuses of two right-angle prisms, and a polarization beam splitting film is coated on the inclined plane, so that the P-polarized light of the incident light is transmitted and the S-polarized light is reflected. All the light beam incident and emergent surfaces are generally coated with antireflection films.

In the prior art, circularly polarized light generated by a common light source is transmitted and reflected by using the polarization of a prism, and the transmitted P light is converted into S light for reuse. The light source used is a common light source, wherein P light needs to be converted, the system is complex and has high cost and low efficiency.

The present invention has been made based on such a situation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to overcome the defects of the prior art and provide the LCOS laser projector with simple structure, low cost, few elements, good projection effect and high efficiency.

The utility model is realized by the following technical scheme:

the utility model provides a LCOS chip laser projection system, includes laser light source, laser light source' S the place ahead is equipped with the static diffusion subassembly that is used for the diffusion light beam in proper order, is used for the dynamic diffusion subassembly of diffusion light beam, is used for collimation subassembly of collimation light beam, is used for transmission P light and the even light subassembly of reflection S light downwards, the light splitting subassembly below is equipped with the LCOS chip, light splitting subassembly top is equipped with projecting lens, screen in proper order, just be equipped with the spotlight subassembly that is used for the convergent light between static diffusion subassembly and the collimation subassembly and be used for the even light subassembly of even light.

According to the LCOS chip laser projection system, the phase delay plate is arranged between the light splitting assembly and the LCOS chip.

As described above, in an LCOS chip laser projection system, the static diffuser includes a first diffuser, and the dynamic diffuser is a diffuser wheel or a dynamic diffuser.

As described above, in the LCOS chip laser projection system, the diffusion wheel includes a driving motor, and a second diffusion sheet is disposed on an output shaft of the driving motor.

In the LCOS chip laser projection system, the dynamic diffusion plate includes a third diffusion plate, and a magnetic element is disposed on the third diffusion plate and electrically connected to the circuit board; when the control signal is input into the circuit board, the circuit board drives the magnetic element to vibrate so as to drive the third diffusion sheet to vibrate.

In an LCOS chip laser projection system as described above, the collimating assembly is a collimating lens.

In an LCOS chip laser projection system as described above, the light-focusing component is a converging lens.

In the LCOS chip laser projection system, the light splitting component is a polarization light splitting prism.

In the LCOS chip laser projection system, the light homogenizing assembly is a light guide tube or an array lens.

In the LCOS chip laser projection system, the laser light source is RGB three-color laser.

Compared with the prior art, the utility model has the following advantages:

1. in the utility model, the laser generated by the laser light source has good polarization, the generated light is S polarized light, and the LCOS chip has the characteristics of S polarized light incidence and P light emission, so that the combination of the laser light source and the LCOS chip is an ideal combination, the conversion of the P light is not needed, and the light efficiency is highest; meanwhile, an element for converting P light into S light is not needed, so that the cost is reduced, and the light efficiency is improved.

2. Moreover, the utility model only needs a single LCOS chip, while most of the existing projection systems need two to three LCOS chips, obviously, the embodiment can reduce the cost.

3. In addition, since the laser light has high collimation, which causes occurrence of speckle, it is necessary to diffuse the light. And the facula can be better eliminated by using the static diffusion component and the dynamic diffusion component to carry out double diffusion, wherein the dynamic diffusion component can carry out dynamic diffusion on light, and the effect of eliminating the facula is good.

4. The diffusion wheel comprises a driving motor, and a second diffusion sheet is arranged on an output shaft of the driving motor. Namely, the driving motor drives the second diffusion sheet to rotate, and the light passes through the rotating second diffusion sheet to have the effect of dynamic diffusion.

5. The dynamic diffusion plate comprises a third diffusion sheet, a magnetic element is arranged on the third diffusion sheet, and the magnetic element is electrically connected with a circuit board; through the input circuit board of control signal, the circuit board drives magnetic element vibration, drives the vibration of third diffusion piece, and light will have the effect of dynamic diffusion through third diffusion piece this moment.

Drawings

The following detailed description of embodiments of the utility model is provided in conjunction with the appended drawings, in which:

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

FIG. 2 is a schematic view of a diffusion wheel;

FIG. 3 is a schematic diagram of a second embodiment of the present invention;

FIG. 4 is a schematic view of a dynamic diffuser plate.

Detailed Description

In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and the detailed description.

The first embodiment is as follows:

fig. 1 to fig. 2 show an LCOS chip laser projection system, which is a first embodiment of the present invention, and includes a laser light source 1, a static diffusion component 2 for diffusing a light beam is disposed in front of the laser light source 1, and the static diffusion component 2 is a first diffusion sheet 201. A light condensing assembly 9 for condensing light is arranged in front of the static diffusion assembly 2, and the light condensing assembly 9 is a condensing lens. A dynamic diffusion component 3 which can rotate or vibrate and is used for diffusing light beams is arranged in front of the light-gathering component 9, and the dynamic diffusion component 3 is a diffusion wheel 301. A light homogenizing assembly 10 for homogenizing light is arranged in front of the dynamic diffusion assembly 3, and the light homogenizing assembly 10 is a light guide pipe 1001. A collimation assembly 4 for collimating light beams is arranged in front of the dodging assembly 10, and the collimation assembly 4 is a collimation lens. A light splitting component 5 for transmitting the P light and reflecting the S light downwards is arranged in front of the collimating component 4, and the light splitting component 5 is a polarization beam splitter Prism (PBS). LCOS chip 6 is equipped with below the spectral assembly 5, be equipped with projection lens 7, screen 8 in proper order above the spectral assembly 5.

The liquid crystal inside the LCOS chip 6 has two states, i.e., on and off, in which the S light is changed into P light and reflected out to penetrate through the PBS prism to enter the lens, and in the off state, the reflected light is still S light and will pass through the PBS prism slope to return to the original path.

As shown in fig. 1, in the present embodiment, the working process is as follows: the light emitted from the laser light source 1 is diffused for the first time by the first diffusion sheet 201 in the state of S light; then the light is converged by a converging lens (a light converging component 9); then, the light enters the diffusion wheel 301 for second diffusion; then, the light enters the light guide 1001 in a state of a small spot, and the light guide 1001 homogenizes the light; then, the light rays are collimated through a collimating lens (collimating component 4); then, the light enters a polarization beam splitter prism (beam splitting component 5), and S light is reflected to the lower part at the inclined plane of the polarization beam splitter prism and enters an LCOS chip 6; when the internal liquid crystal of the LCOS chip 6 is opened, the S light is converted into the P light to be emitted; the P light passes through the polarization splitting prism to the projection lens 7 and is projected onto the screen 8.

As shown in fig. 1, in this embodiment, the laser generated by the laser light source 1 has good polarization, the generated light is S-polarized light, and the LCOS chip 6 has the characteristics of S-polarized light incidence and P-polarized light emission, so that the combination of the laser light source 1 and the LCOS chip 6 is an ideal combination, and the light efficiency is highest without performing P-light conversion; meanwhile, an element for converting P light into S light is not needed, so that the cost is reduced and the light efficiency is improved.

Moreover, the present embodiment only needs a single LCOS chip 6, and most of the present projection systems need 2-3 LCOS chips 6, which obviously reduces the cost.

In addition, since the laser light has high collimation, which causes occurrence of speckle, it is necessary to diffuse the light. And use static diffusion subassembly 2, dynamic diffusion subassembly 3 to carry out the double diffusion and can eliminate the facula better, wherein dynamic diffusion subassembly 3 can carry out dynamic diffusion to light, and it is fine to eliminate the facula effect.

More specifically, as shown in fig. 1, a phase retarder 11 is disposed between the light splitting assembly 5 and the LCOS chip 6. The phase retarder 11 is used to compensate for a phase difference when the liquid crystal is rotated during projection to improve viewing angle characteristics (eliminate anisotropy, expand a range).

More specifically, as shown in fig. 2, the diffusion wheel 301 includes a driving motor 3011, and a second diffusion sheet 3012 is provided on an output shaft of the driving motor 3011. That is, the driving motor 3011 drives the second diffusion sheet 3012 to rotate, and the light passes through the rotating second diffusion sheet 3012, which has dynamic diffusion effect.

More specifically, the laser light source 1 is an RGB three-color laser. This allows for color projection.

Example two:

an LCOS chip laser projection system as shown in fig. 3 to fig. 4 is a second embodiment of the present invention, and is different from the first embodiment in that: the dynamic diffusion component 3 is replaced by a diffusion wheel 301 and a dynamic diffusion plate 302; the light homogenizing assembly 10 is replaced by an array lens 1002 from a light guide 1001; the positions of the light-gathering component 9 and the light-homogenizing component 10 are different, that is, in the embodiment, the light-gathering component 9 is between the dynamic diffusion component 3 and the collimation component 4, and the light-homogenizing component 10 is between the static diffusion component 2 and the dynamic diffusion component 3.

As shown in fig. 3, in the present embodiment, the working process is as follows: the light emitted from the laser light source 1 is diffused for the first time by the first diffusion sheet 201 in the state of S light; then, the light enters the array lens 1002, and the array lens 1002 homogenizes the light; then the light enters the dynamic diffusion plate 302 for the second diffusion; then the light is converged by a converging lens (a light converging component 9); then, the light rays are collimated through a collimating lens (collimating component 4); then, the light enters a polarization beam splitter prism (beam splitting component 5), S light is reflected to the lower part at the inclined plane of the polarization beam splitter prism and firstly passes through a phase delay plate 11 and then enters an LCOS chip 6; when the internal liquid crystal of the LCOS chip 6 is opened, the S light is converted into the P light to be emitted; the P light passes through the phase retarder 11, then passes through the polarization splitting prism to reach the projection lens 7, and is projected onto the screen 8.

In this embodiment, the light pipe 1001 in the first embodiment is replaced with the array lens 1002, and the light pipe can also play a role of light uniformization. The array lens 1002 dodging needs parallel light incidence and then emergent at a small angle, and laser light has very good parallelism and is a very good scheme for matching. For speckle elimination, a combination of static diffusion (the first diffusion plate 201) and dynamic diffusion (the dynamic diffusion plate 302) is still used, but in the embodiment, the dynamic diffusion plate 302 is adopted because the array lens 1002 is needed, and the parallel incident light spot is large and is not suitable for the form of the diffusion wheel 301.

More specifically, as shown in fig. 4, the dynamic diffuser 302 includes a third diffuser 3021, a magnetic element 3022 is disposed on the third diffuser 3021, and the magnetic element 3022 is electrically connected to a circuit board 3023; when a control signal is input to the circuit board 3023, the circuit board 3023 drives the magnetic element 3022 to vibrate, so that the third diffusion sheet 3021 is driven to vibrate. Through the input of the control signal to the circuit board 3023, the circuit board 3023 drives the magnetic element 3022 to vibrate, and drives the third diffusion sheet 3021 to vibrate, so that the light passes through the third diffusion sheet 3021, and then the light has a dynamic diffusion effect.

It should be understood that the above-described embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. An LCOS chip laser projection system, comprising: including laser light source (1), the place ahead of laser light source (1) is equipped with static diffusion subassembly (2) that are used for the diffusion light beam in proper order, is used for the dynamic diffusion subassembly (3) of diffusion light beam, collimation subassembly (4) that are used for collimated light beam, is used for transmission P light and reflects beam splitting subassembly (5) of S light downwards, beam splitting subassembly (5) below is equipped with LCOS chip (6), beam splitting subassembly (5) top is equipped with projection lens (7), screen (8) in proper order, just be equipped with spotlight component (9) that are used for the convergent light between static diffusion subassembly (2) and collimation subassembly (4) and be used for even photic even light subassembly (10).

2. An LCOS chip laser projection system as claimed in claim 1, wherein: and a phase delay plate (11) is arranged between the light splitting component (5) and the LCOS chip (6).

3. An LCOS chip laser projection system as claimed in claim 1 or 2, wherein: the static diffusion component (2) comprises a first diffusion sheet (201), and the dynamic diffusion component (3) is a diffusion wheel (301) or a dynamic diffusion plate (302).

4. A LCOS chip laser projection system as claimed in claim 3, wherein: the diffusion wheel (301) comprises a driving motor (3011), and a second diffusion sheet (3012) is arranged on an output shaft of the driving motor (3011).

5. A LCOS chip laser projection system as claimed in claim 3, wherein: the dynamic diffusion plate (302) comprises a third diffusion sheet (3021), a magnetic element (3022) is arranged on the third diffusion sheet (3021), and the magnetic element (3022) is electrically connected with a circuit board (3023); when a control signal is input into the circuit board (3023), the circuit board (3023) drives the magnetic element (3022) to vibrate so as to drive the third diffusion sheet (3021) to vibrate.

6. An LCOS chip laser projection system as claimed in claim 1, wherein: the collimation component (4) is a collimation lens.

7. An LCOS chip laser projection system as claimed in claim 1, wherein: the light-gathering component (9) is a converging lens.

8. An LCOS chip laser projection system as claimed in claim 1, wherein: the light splitting component (5) is a polarization light splitting prism.

9. An LCOS chip laser projection system as claimed in claim 1, wherein: the light homogenizing component (10) is a light guide pipe (1001) or an array lens (1002).

10. An LCOS chip laser projection system as claimed in claim 1, wherein: the laser light source (1) is RGB three-color laser.