CN112327504A

CN112327504A - 3D laser projection television and laser television system

Info

Publication number: CN112327504A
Application number: CN202011275857.6A
Authority: CN
Inventors: 马贵智; 刘琴
Original assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Current assignee: Wuhan China Star Optoelectronics Technology Co Ltd
Priority date: 2020-11-16
Filing date: 2020-11-16
Publication date: 2021-02-05

Abstract

The application relates to a 3D laser projection television and a laser television system, wherein the 3D laser projection television comprises a laser signal source, a beam splitting module and an LCD optical switch module which are sequentially arranged. The LCD optical switch module comprises a first LCD optical switch and a second LCD optical switch which are arranged in parallel. The polarization directions of the first LCD optical switch and the second LCD optical switch are orthogonal. The beam splitting module is used for splitting signal laser emitted by the laser signal source into two beams, projecting one beam to the first LCD optical switch and projecting the other beam to the second LCD optical switch. The first LCD optical switch and the second LCD optical switch are respectively used for displaying pictures corresponding to the two light beams. Laser emitted by a laser signal source is divided into two light beams which are respectively projected on two LCD optical switches, so that two display pictures which are orthogonal in the off-normal direction are formed. Two display frames can be overlapped to form a 3D frame, 3D mode switching is more natural, images are smoother, high-frequency refreshing of images in a traditional 3D display mode is avoided, and 3D display performance is greatly improved.

Description

3D laser projection television and laser television system

Technical Field

The application relates to the technical field of display, in particular to a 3D laser projection television and a laser television system.

Background

With the development of televisions, the size of the display screen is larger and larger, for example, the current mainstream size is 55 inches and 65 inches, the experience of such large-size television products for family viewing is more and more shocked, so the trend of large screen still continues, for example, a television with a 75-inch or even larger screen will be moved into more and more families of users. Among them, laser television is a large-screen product which is paid much attention at present, and the sales percentage and the growth rate of the large-screen television product are rapidly increasing year by year and occupy more and more important market positions.

The laser television is a television product which adopts a laser light source and is matched with a more professional light-resistant gain screen as a new television product which rises in recent years. Moreover, the laser television has a 3D display function, the 3D effect is realized mainly by improving the quick refresh rate of the picture, the laser television belongs to an active 3D technology, and a user can watch the 3D effect by wearing shutter 3D glasses. However, in the implementation process, the inventor finds that at least the problem of poor 3D display performance exists in the conventional technology.

Disclosure of Invention

Based on this, it is necessary to provide a 3D laser projection television and a laser television system in view of the problems in the conventional techniques described above.

In order to achieve the above object, on one hand, the embodiment of the present application provides a 3D laser projection television, and on the other hand, the embodiment of the present application also provides a laser television system.

On one hand, the 3D laser projection television comprises a laser signal source, a beam splitting module and an LCD optical switch module which are sequentially arranged, wherein the LCD optical switch module comprises a first LCD optical switch and a second LCD optical switch which are arranged in parallel, and the polarization directions of the first LCD optical switch and the second LCD optical switch are orthogonal;

the beam splitting module is used for splitting signal laser emitted by the laser signal source into two beams, projecting one beam to the first LCD optical switch and projecting the other beam to the second LCD optical switch;

the first LCD optical switch and the second LCD optical switch are respectively used for displaying pictures corresponding to the two light beams.

In one embodiment, the first and second LCD optical switches are LCD screens of the same architecture and size, with the CF side glass of both LCD screens being free of light blocking.

In one embodiment, the first LCD optical switch and the second LCD optical switch are both circular polarizing screens.

In one embodiment, the first LCD optical switch and the second LCD optical switch are both line polarizers.

In one embodiment, the first LCD optical switch comprises a first LCD screen, a polarization component A and a polarization component B, wherein the polarization component A and the polarization component B are respectively attached to two main planes on two sides of the first LCD screen;

the polarizing component A is a polarizing plate or a polarizing grating with a horizontal polarizing transmission axis, and the polarizing component B is a polarizing plate or a polarizing grating with a vertical polarizing transmission axis.

In one embodiment, the second LCD optical switch comprises a second LCD screen, a polarization assembly C and a polarization assembly D, wherein the polarization assembly C and the polarization assembly D are respectively attached to two main planes on two sides of the second LCD screen;

the polarizing component C is a polarizing film or a polarizing grating with a vertical polarizing transmission axis, and the polarizing component D is a polarizing film or a polarizing grating with a horizontal polarizing transmission axis.

In one embodiment, either of the two LCD screens comprises a single active display area or 3 LCD screens of independent active display areas.

In one embodiment, the beam splitting module is a beam splitter.

In one embodiment, the laser signal source includes a light source formed by a RGB three-primary-color laser source or a monochromatic laser excited phosphor powder in combination with a rotating color wheel.

On the other hand, the laser television system comprises 3D glasses and the 3D laser projection television, wherein the 3D glasses are used for acquiring 3D superposed pictures of two pictures respectively displayed by a first LCD optical switch and a second LCD optical switch of the 3D laser projection television.

One of the above technical solutions has the following advantages and beneficial effects:

divide into two light beams and respectively through the LCD optical switch of two off-normal direction orthorhombic through the beam splitting module group for the laser with laser signal source outgoing for the display screen that two light beams correspond is projected on two LCD optical switches, form two display screens of off-normal direction orthorhombic, so spectator can see the 3D picture that two display screen superposes formation through ordinary 3D glasses, its 3D mode switching is more natural, the image is more smooth and need not to adopt the image high frequency refresh mode of traditional 3D display mode, it is better to prevent fatigue and dazzle the effect, 3D display performance has been promoted by a wide margin.

Drawings

Fig. 1 is a schematic diagram of a general optical path principle inside one of the hosts of the existing laser television;

FIG. 2 is a schematic diagram illustrating the structure of a 3D laser projection television according to an embodiment;

FIG. 3 is a schematic diagram of a first LCD light switch in one embodiment;

FIG. 4 is a diagram illustrating the relationship between the transmission axes of polarized light in the display plane of a first LCD light switch in one embodiment;

FIG. 5 is a schematic diagram of a second LCD light switch in one embodiment;

FIG. 6 is a diagram illustrating the relationship between the transmission axes of polarized light in the display plane of a second LCD light switch in one embodiment;

FIG. 7 is a schematic view of an LCD screen with a single AA area in one embodiment;

FIG. 8 is a schematic diagram of an LCD screen with 3 AA areas according to an embodiment.

Detailed Description

To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are shown in the drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.

It should be noted that when an element is referred to as being "connected" to another element, it can be directly connected to and integrated with the other element or intervening elements may also be present, and optical paths along the optical path may also be contiguous. The terms "mounted," "one side," "another side," and the like are used herein for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

The laser television is a fourth generation television which can watch radio and television programs and request internet contents. Compared with the traditional television, the eye-protection television has the advantages of high cost performance, eye protection, high spectral purity, energy conservation, environmental protection, low cost and the like. Fig. 1 is a schematic diagram of a general optical path principle inside one of the hosts of the laser television. The existing laser television generally has a 3D display function, realizes a 3D effect mainly by improving a fast refresh rate of a picture (usually 120Hz is required), belongs to an active 3D technology, and is also called a time division shading technology or a liquid crystal time division technology. The specific implementation process can be briefly described as follows: when the 3D signal is input into a display device (such as a display, a projector and the like), the image realizes the alternate generation of left and right frames in a frame sequence format, and the frame signals are transmitted out in a wireless mode such as an infrared transmitter or Bluetooth; the 3D glasses which are responsible for receiving the frame signals refresh and synchronize to realize that the left eye and the right eye watch the corresponding images, and keep the same frame number as the 2D video images, thus, the two eyes of the audience watch different images which are switched quickly, and illusion (the effect that the camera cannot shoot) is generated in the brain to watch the stereoscopic images.

However, the 3D display method also has a disadvantage of insufficient display performance, thereby affecting the viewing experience. For example, the glasses are easily affected by fluorescent lamps to cause picture flicker, and the 3D glasses are opened and closed and incompletely synchronized with a television to cause double images, so that the eyes of viewers are easily tired. In addition, after the user wears the shutter 3D glasses matched with the user, the brightness of the picture is greatly reduced, each eye can actually obtain about 40% of light, and the viewer can easily feel dizzy in the film watching process due to the long-time use of frequency switching.

In order to solve the problems of the traditional laser television 3D display technology, the application provides the following technical scheme:

referring to fig. 2, in one aspect, a 3D laser projection television 100 is provided, which includes a laser signal source 12, a beam splitting module 14, and an LCD optical switch module 16 arranged in sequence. The LCD optical switch module 16 includes a first LCD optical switch 162 and a second LCD optical switch 164 arranged in parallel. The polarization directions of the first LCD light switch 162 and the second LCD light switch 164 are orthogonal. The beam splitting module 14 is configured to split the signal laser emitted from the laser signal source 12 into two beams, and project one of the two beams to the first LCD optical switch 162 and project the other beam to the second LCD optical switch 164. The first LCD optical switch 162 and the second LCD optical switch 164 are respectively used for displaying pictures corresponding to the two light beams.

It is understood that the laser signal source 12 can be any type of laser light source known in the art, such as any type of laser television host available in the market, as long as it can emit the required television laser signal for projection display. The beam splitting module 14 is a beam splitting module 14 that splits a laser beam emitted from a light source into two beams, and may be, for example, a beam splitter or a device of various types that splits one laser beam into two identical or nearly identical laser beams. The LCD optical switch is a polarized LCD screen and is configured to receive the laser signal emitted after beam splitting by the beam splitting module 14 and display a display image corresponding to the signal. The two LCD optical switches may be of the same type or different types of LCD screens, and their polarization directions may not be limited herein as long as the two LCD optical switches can respectively transmit the projected laser beams to form two display frames with orthogonal polarization directions.

It should be noted that, the arrangement distances between the beam splitting module 14 and the laser signal source 12 and between the two LCD optical switches, which can be set by those skilled in the art according to the projection requirements of the host of the laser television in the art, are only required to form an effective and reliable projection optical path. The mode that sets up side by side between two LCD optical switches can be as the mode concatenation side by side of concatenation screen, also can be two screens direct interval certain interval concatenations (specific interval size can be confirmed according to the size of two screens and the size of seeing the shadow distance), as long as can guarantee that two screen display's picture can effectively superpose, and the 3D glasses that see through spectator and wear form the 3D picture can.

Compared with the 3D display function of the traditional DLP technology, the laser projection technology based on the LCD optical switch is used for splitting laser emitted by the laser signal source 12 into two LCD optical switches with different polarization directions. The display corresponding to the laser light will be projected onto the two LCD light switches. Since the polarization directions of the two LCD optical switches are orthogonal, such as, but not limited to, the polarization transmission direction of one LCD optical switch being horizontal (relative to the horizontal plane) and the polarization transmission direction of the other LCD optical switch being vertical (relative to the horizontal plane), or the polarization transmission direction of one LCD optical switch being positive 45 degrees (relative to the horizontal plane) and the polarization transmission direction of the other LCD optical switch being negative 45 degrees (relative to the horizontal plane), the polarization directions of the pictures projected and displayed on the two LCD optical switches, respectively, will also be orthogonal to each other.

Thus, when the audience wears polarized glasses (i.e. common 3D glasses on the market (compared to the shutter type 3D glasses required by the conventional active 3D technology), such as 3D glasses distributed in a general 3D cinema), the images displayed by the two LCD optical switches can be seen and combined in the brain to form a 3D effect (practice shows that the effect can be the same as the 3D effect of the 3D cinema). Adopt this kind of 3D display mode, no longer need the image high frequency among the traditional laser television 3D mode to refresh the dislocation display, also no longer need collocation shutter-type 3D glasses, 3D mode switches more naturally and less to 3D image resource restriction, the image is more smooth, can exert LCD screen display's advantage more fully, do not have the image frequency of refreshing and shutter-type 3D glasses asynchronous, signal delay scheduling problem, can eliminate the visual injury that produces because of the high frequency switches well, the long-time use has been avoided and can make viewer's eyes appear bad experiences such as tired and dizzy sense.

Divide into two light beams and respectively through the LCD optical switch of two off-normal direction orthorhombic through beam splitting module 14 with the laser of laser signal source 12 outgoing for the display screen that two light beams correspond is projected on two LCD optical switches, form two display screens of off-normal direction orthorhombic, so spectator can see the 3D picture that two display screens superpose and form through ordinary 3D glasses, its 3D mode switch is more natural, the image is more smooth and need not to adopt the image high frequency refresh mode of traditional 3D display mode, it is better to prevent fatigue and dazzle the effect, 3D display performance has been promoted by a wide margin.

In one embodiment, the first and second LCD

optical switches

162, 164 are LCD screens of the same architecture and size. The CF side glass of both LCD screens is photoresist free.

It can be understood that, in this embodiment, two LCD screens having the same structure and the same size and having no photoresist on the CF side glass of the screen may be adopted, and it is only necessary to ensure that the polarization axes of the two LCD screens are orthogonal to each other. The polarization types of the two LCD screens are not limited, and may be selected and determined according to the projection display effect.

In application, the two LCD screens can be respectively and independently powered, and can also be synchronously powered by a uniform power supply; in addition, the two LCD screens can be installed in parallel through the same screen frame, and can be determined according to the requirements of viewing scenes.

By applying two LCD screens with the same specification and orthogonal polarization directions, two projected display pictures tend to be consistent except for the orthogonal polarization directions, so that the quality of a 3D display picture is further improved.

In one embodiment, the first LCD light switch 162 and the second LCD light switch 164 are both circular polarized screens. Optionally, in this embodiment, two Circular Polarization Screens (CPLPs) with the same specification and orthogonal polarization directions are used for laser projection display, so that the overall image quality of 3D projection display can be improved based on the excellent display performance of the Circular Polarization Screens (CPLPs), and the 3D display performance and effect can be further improved.

In one embodiment, the first LCD optical switch 162 and the second LCD optical switch 164 are both line polarizing screens. Optionally, in this embodiment, two linearly polarized light screens with the same specification and orthogonal polarization directions may be selected for laser projection display, so that a 3D projection display image quality meeting requirements may be provided based on the LCD display performance of the linearly polarized light screens, and better 3D display performance and effect may also be obtained.

Referring to fig. 3 and 4, in one embodiment, the first LCD optical switch 162 includes a first LCD screen 1622, a polarizer assembly a, and a polarizer assembly B. The polarization assembly a and the polarization assembly B are attached to the two main planes of the first LCD screen 1622, respectively. The polarizing component A is a polarizing plate or a polarizing grating with a horizontal polarized light transmission axis. The polarized light of the polarized light component B is transmitted through a polaroid or a polarization grating with a vertical axis.

In this embodiment, the first LCD 1622 may be various types of LCD screens commonly found in the art, and take a TFT (Thin Film Transistor) screen as an example, and includes main portions (a specific screen structure may be understood with reference to the structure of the LCD screen in the art, and will not be described herein again), such as a TFT layer, an LC (Liquid Crystal) layer, and a CF (color Filter), where the two polarizing components a and B may be both polarizing gratings, and may be in a sequence from left to right as shown in fig. 3, if a polarization transmission axis of the polarizing component a disposed on the TFT side is a horizontal direction (with reference to a horizontal plane), a polarization transmission axis of the polarizing component B disposed on the CF side is a vertical direction (with reference to a horizontal plane), or if a polarization transmission axis of the polarizing component a disposed on the TFT side is a vertical direction (with reference to a horizontal plane), the transmission axis of the polarized light of the polarizer B disposed on the CF side is in the horizontal direction (with reference to the horizontal plane), or other polarization angles may be used according to the actual display and viewing requirements. Regardless of the polarization direction setting, the polarization direction of the second LCD optical switch 164 is orthogonal to the polarization direction of the first LCD optical switch 162.

As shown in fig. 4, an example of the relationship between the polarized light transmission axes of the two polarization assemblies a and B on the display plane of the first LCD 1622 is that by using the above LCD structure, the viewer can watch with the 3D glasses, the 3D effect is better and the overall application cost can be effectively reduced compared to the 3D mode of the conventional laser television.

Referring to fig. 5 and 6, in one embodiment, the second LCD optical switch 164 includes a second LCD screen 1642, a polarization component C and a polarization group. The polarization component C and the polarization component D are respectively attached to two side principal planes of the second LCD screen 1642. The polarizing component C is a polarizing plate or a polarizing grating with a vertical polarized light transmission axis. The polarized light of the polarized light component D is transmitted through a polarizing plate or a polarization grating with a horizontal axis.

In this embodiment, the second LCD 1642 may be various types of LCD screens commonly found in the art, taking a TFT screen as an example, and includes main portions such as a TFT layer, an LC layer, and a CF (specific screen structure can be understood with reference to the structure of the LCD screen in the art, and is not described herein again), two polarizing components C and D may be both polarizers or both polarizing gratings, as shown in fig. 5, from left to right, in order, if the polarized light transmission axis of the polarizing component C disposed on the TFT side is a vertical direction (with reference to a horizontal plane), the polarized light transmission axis of the polarizing component D disposed on the CF side is a horizontal direction (with reference to a horizontal plane), or if the polarized light transmission axis of the polarizing component C disposed on the TFT side is a horizontal direction (with reference to a horizontal plane), the polarized light transmission axis of the polarizing component D disposed on the CF side is a vertical direction (with reference to a horizontal plane), or, other polarization angles can be adopted according to the actual display and viewing requirements. Regardless of the polarization direction setting, the polarization direction of the first LCD optical switch 162 may be orthogonal to the polarization direction of the second LCD optical switch 164.

It will be appreciated that the first LCD optical switch 162 and the second LCD optical switch 164 may also each employ the same architecture as described above, such as but not limited to: in order from the left to the right, when the polarization transmission axis of the polarizer C disposed on the TFT side is in the horizontal direction (with reference to the horizontal plane) in the second LCD optical switch 164, the polarization transmission axis of the polarizer D disposed on the CF side is in the vertical direction (with reference to the horizontal plane), and when the polarization transmission axis of the polarizer a disposed on the TFT side is in the vertical direction (with reference to the horizontal plane) in the first LCD optical switch 162, the polarization transmission axis of the polarizer B disposed on the CF side is in the horizontal direction (with reference to the horizontal plane).

As shown in fig. 6, an example of the relationship between the polarized light transmission axes of the two polarization components C and D on the display plane of the second LCD screen 1642 is that by adopting the LCD structure, viewers can watch the images with common 3D glasses, the 3D effect is better and the overall application cost can be effectively reduced compared with the 3D mode of the conventional laser television.

Referring to fig. 7 and 8, in one embodiment, any one of the two LCD screens includes an LCD screen having a single active display area or 3 independent active display areas.

It is understood that the active Area, also called active Area (AA Area for short), may be a single active Area on one LCD screen, for example, an AA Area is displayed on both LCD screens, as shown in fig. 7. In other embodiments, the LCD screen may not be limited to a single AA area, for example, as shown in fig. 8, 3 AA areas are respectively displayed on two LCD screens, so as to better improve the display quality or perform multi-window display according to the viewing requirements. Those skilled in the art can select LCD screens with other numbers of AA areas according to the actual projection viewing requirements.

In one embodiment, the beam splitting module 14 is a beam splitter. It can be understood that, in this embodiment, it is preferable to use a beam splitter commonly used in the art to implement the required light source beam splitting, and the specific type, size, and the like of the beam splitter can be selected according to the requirement of the projection light path, as long as it can implement the beam splitting of one light source laser into two identical or approximately identical laser beams, and the two laser beams are respectively projected onto two LCD screens to perform effective projection.

In some embodiments, the beam splitter can be used as a separate component in combination with the laser host (i.e., the aforementioned laser signal light source) and the two display screens. In other embodiments, the spectroscope may also be provided with a positioning portion so as to be fixed to the laser host or to the mounting frame of the two display screens by the positioning portion. For another example, in other embodiments, a dedicated or general positioning portion may be further provided on the laser host or the mounting frame of the display screen, so as to mount the fixed beam splitter in an application scenario.

The laser beam emitted by the laser signal light source is divided into two beams by the spectroscope widely used in the field, and then the two beams are projected to the LCD screens with two orthogonal polarization directions respectively, so that display pictures with different polarization directions are realized, the 3D mode switching of the laser television is simpler and more convenient, the laser signal source 12 is not required to perform traditional complex control, and the 3D display is low in realization cost and better in performance.

In one embodiment, the laser signal source 12 comprises a light source formed by an RGB three-primary-color laser source or a monochromatic laser-excited phosphor-rotating color wheel.

It is understood that in the present embodiment, the laser signal source 12 may be an R/G/B three-color laser source in the art, or may be a light source formed by a monochromatic laser excited by a phosphor powder and a rotating color wheel. It should be noted that, in the above embodiment, the two laser light sources are not limited to be used. By applying the 3D display implementation mode, more types of 3D image resources can be compatible, the limitation on the light source is less, the high-frequency refreshing dislocation display of the image is not needed to be carried out on the light source, the 3D display effect can be realized, and the display cost is lower.

In another aspect, a laser television system is provided, which includes 3D glasses and the 3D laser projection television 100. The 3D glasses are used to acquire a 3D overlay picture of two pictures respectively displayed by the first LCD optical switch 162 and the second LCD optical switch 164 of the 3D laser projection television 100.

It is to be understood that, in the present embodiment, for the explanation of the 3D laser projection television 100, reference may be specifically made to the corresponding explanation in each embodiment of the 3D laser projection television 100, and repeated descriptions will not be provided in the present embodiment. The 3D glasses are polarized glasses formed by polarizer or polarization grating in the art as a polarization component, and are common 3D glasses compared to the shutter type 3D glasses required by the conventional active 3D technology, and the cost of the 3D glasses is usually much lower than that of the shutter type 3D glasses.

Specifically, the laser television system provided by the present application, compared to a laser television system with a 3D display function in the conventional DLP technology, is a laser projection technology based on an LCD optical switch, and is an LCD optical switch that splits laser emitted from a laser signal source 12 into two different polarization directions. The display corresponding to the laser light will be projected onto the two LCD light switches. Since the polarization directions of the two LCD optical switches are orthogonal, such as, but not limited to, the polarization transmission direction of one LCD optical switch being horizontal (relative to the horizontal plane) and the polarization transmission direction of the other LCD optical switch being vertical (relative to the horizontal plane), or the polarization transmission direction of one LCD optical switch being positive 45 degrees (relative to the horizontal plane) and the polarization transmission direction of the other LCD optical switch being negative 45 degrees (relative to the horizontal plane), the polarization directions of the pictures projected and displayed on the two LCD optical switches, respectively, will also be orthogonal to each other.

Thus, when the audience wears the polarized glasses (i.e. the aforementioned common 3D glasses on the market), the images displayed by the two LCD optical switches can be seen and combined in the brain to form a 3D effect (the effect can be the same as the 3D effect of a 3D cinema through practice). Adopt this kind of 3D display mode, no longer need the image high frequency among the traditional laser television 3D mode to refresh the dislocation display, also no longer need collocation shutter-type 3D glasses, 3D mode switches more naturally and less to 3D image resource restriction, the image is more smooth, can exert LCD screen display's advantage more fully, do not have the image frequency of refreshing and shutter-type 3D glasses asynchronous, signal delay scheduling problem, can eliminate the visual injury that produces because of the high frequency switches well, the long-time use has been avoided and can make viewer's eyes appear bad experiences such as tired and dizzy sense.

Through foretell 3D laser projection TV 100 of ordinary 3D glasses collocation application, can divide into two light beams and respectively through the LCD optical switch of two off-normal directions orthorhombic based on beam splitting module 14 for the laser with laser signal source 12 outgoing, make the display screen that two light beams correspond be projected on two LCD optical switches, form two display screens of off-normal direction orthorhombic, spectator can see the 3D picture that two display screens superpose and form through ordinary 3D glasses, its 3D mode switching is more natural, the image is more smooth and need not to adopt the image high frequency refresh mode of traditional 3D display mode, it is better with dazzling effect to prevent fatigue, 3D display performance has been promoted by a wide margin.

In addition, the 3D mode of traditional laser TV needs to be collocated with shutter type 3D glasses, and the laser TV system of this application then can directly use ordinary 3D glasses can realize the 3D of preferred and see the shadow effect, and the cost is lower and the visual injury can effectively be avoided to can also be favorable to laser TV system's further popularization, make laser TV system possess more excellent economic benefits, user experience is also better.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the claims. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A3D laser projection television is characterized by comprising a laser signal source, a beam splitting module and an LCD optical switch module which are sequentially arranged, wherein the LCD optical switch module comprises a first LCD optical switch and a second LCD optical switch which are arranged in parallel, and the polarization directions of the first LCD optical switch and the second LCD optical switch are orthogonal;

2. The 3D laser projection television of claim 1, wherein the first LCD optical switch and the second LCD optical switch are LCD screens of the same architecture and size, the CF side glass of both LCD screens being non-photoresistive.

3. The 3D laser projection television of claim 2, wherein the first LCD optical switch and the second LCD optical switch are both circular polarizing screens.

4. The 3D laser projection television of claim 2, wherein the first LCD optical switch and the second LCD optical switch are both line polarizers.

5. The 3D laser projection television of claim 3, wherein the first LCD optical switch comprises a first LCD screen, a polarization component a and a polarization component B, the polarization component a and the polarization component B being attached to two main planes of the first LCD screen, respectively;

the polarized light component A is a polarized light sheet or a polarized grating with a horizontal polarized light transmission axis, and the polarized light component B is a polarized light sheet or a polarized grating with a vertical polarized light transmission axis.

6. The 3D laser projection television of claim 3 or 5, wherein the second LCD optical switch comprises a second LCD screen, a polarization component C and a polarization component D, the polarization component C and the polarization component D are respectively attached to two main planes on two sides of the second LCD screen;

the polarized light component C is a polarized light sheet or a polarized grating with a vertical polarized light transmission axis, and the polarized light component D is a polarized light sheet or a polarized grating with a horizontal polarized light transmission axis.

7. The 3D laser projection television of claim 2, wherein either of the two LCD screens comprises a single active display area or a 3-independent active display area LCD screen.

8. The 3D laser projection television of claim 1, wherein the beam splitting module is a beam splitter.

9. The 3D laser projection television of claim 1, wherein the laser signal source comprises a light source formed by RGB three-primary-color laser source or a monochromatic laser excitation phosphor in combination with a rotating color wheel.

10. A laser television system comprising 3D glasses and the 3D laser projection television of any one of claims 1 to 9, wherein the 3D glasses are configured to obtain a 3D overlay of two frames respectively displayed by a first LCD optical switch and a second LCD optical switch of the 3D laser projection television.