3D laser projection television and laser television system

Abstract

The application relates to a 3D laser projection television and a laser television system. The 3D laser projection television comprises a laser signal source, a beam splitting module and an LCD light switch module arranged in sequence. The LCD light switch module comprises a first LCD light switch and a second LCD light switch arranged side by side. The polarization directions of the first LCD light switch and the second LCD light switch are orthogonal. The beam splitting module is used for splitting the signal laser emitted by the laser signal source into two beams, projecting one of the beams to the first LCD light switch and the other beam to the second LCD light switch. The first LCD light switch and the second LCD light switch are respectively used for displaying the pictures corresponding to the two beams. By splitting the laser emitted by the laser signal source into two beams and projecting the two beams onto the two LCD light switches respectively, two display pictures with orthogonal polarization directions are formed. The two display pictures can be superimposed to form a 3D picture. The 3D mode switching is more natural, the image is more fluent, the high-frequency refreshing of the image in the traditional 3D display mode is avoided, and the 3D display performance is greatly improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of display, in particular to a 3D laser projection television and a laser television system. BACKGROUND

[0002] With the development of television, the size of display screen is getting larger and larger, for example, the current mainstream size is 55 inches and 65 inches, such large size television products are used for the experience of home viewing, and the experience is more and more shocking, so the large screen trend will continue, such as 75 inches or even larger screen televisions will enter more and more user families. Among them, laser television is a large screen product that has been paid much attention in recent years, and the sales proportion and growth rate of large screen television products are increasing rapidly year by year, and it occupies an increasingly important market position.

[0003] Laser television is a new television category that has emerged in recent years, which is a television product that uses laser light source and is matched with a more professional anti-light gain screen. Moreover, the laser television has 3D display function, which mainly realizes 3D effect by improving the rapid refresh rate of the picture, which belongs to active 3D technology, and users can watch 3D effect by wearing shutter 3D glasses. However, in the implementation process, the inventor found that the traditional technology at least has the problem of poor 3D display performance. SUMMARY

[0004] Therefore, it is necessary to provide a 3D laser projection television and a laser television system in view of the problems in the prior art.

[0005] In order to achieve the above purpose, on the one hand, the embodiments of the present application provide a 3D laser projection television, and on the other hand, the embodiments of the present application also provide a laser television system.

[0006] On the one hand, a 3D laser projection television is provided, which comprises a laser signal source, a beam splitting module and an LCD light switch module arranged in sequence, the LCD light switch module comprises a first LCD light switch and a second LCD light switch arranged side by side, and the polarization directions of the first LCD light switch and the second LCD light switch are orthogonal.

[0007] The beam splitting module is used for splitting the signal laser emitted by the laser signal source into two beams, and then projecting one of the beams to the first LCD light switch and the other beam to the second LCD light switch.

[0008] The first LCD light switch and the second LCD light switch are respectively used for displaying the pictures corresponding to the two beams.

[0009] In one of the embodiments, the first LCD light switch and the second LCD light switch are LCD screens with the same architecture and size, and the CF side glass of the two LCD screens has no light resistance.

[0010] In one embodiment, the first LCD light switch and the second LCD light switch are both circular polarizing screens.

[0011] In one embodiment, the first LCD light switch and the second LCD light switch are both linear polarizing screens.

[0012] In one embodiment, the first LCD light switch comprises a first LCD screen, a polarizing component A and a polarizing component B, the polarizing component A and the polarizing component B are respectively attached to the two side main planes of the first LCD screen.

[0013] The polarizing component A is a polarizing screen or a polarizing grating with horizontal polarized light transmission axis, and the polarizing component B is a polarizing screen or a polarizing grating with vertical polarized light transmission axis.

[0014] In one embodiment, the second LCD light switch comprises a second LCD screen, a polarizing component C and a polarizing component D, the polarizing component C and the polarizing component D are respectively attached to the two side main planes of the second LCD screen.

[0015] The polarizing component C is a polarizing screen or a polarizing grating with vertical polarized light transmission axis, and the polarizing component D is a polarizing screen or a polarizing grating with horizontal polarized light transmission axis.

[0016] In one embodiment, any of the two LCD screens comprises a single effective display area or a LCD screen with three independent effective display areas.

[0017] In one embodiment, the beam splitting module is a beam splitter.

[0018] In one embodiment, the laser signal source comprises RGB three primary color laser sources or a single color laser exciting fluorescent powder combined with a rotating color wheel.

[0019] In another aspect, a laser television system is also provided, which comprises a 3D glasses and the above-mentioned 3D laser projection television, the 3D glasses being used to obtain a 3D superimposed picture of two pictures displayed by the first LCD light switch and the second LCD light switch of the 3D laser projection television.

[0020] One of the above technical solutions has the following advantages and beneficial effects:

[0021] The laser emitted by the laser signal source is divided into two beams by a beam splitting module, and the two beams pass through two LCD light switches with orthogonal polarization directions respectively, so that the two display pictures corresponding to the two beams are projected onto the two LCD light switches, forming two display pictures with orthogonal polarization directions, so that the audience can see the 3D picture formed by the superposition of the two display pictures through the ordinary 3D glasses, the 3D mode switching is more natural, the image is more smooth, the image high-frequency refreshing mode of the traditional 3D display mode is not needed, the fatigue and dazzling effects are better, and the 3D display performance is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 It is a general optical path principle schematic diagram of the host inside of the existing laser television;

[0023] Figure 2 It is a structural composition schematic diagram of the 3D laser projection television in an embodiment;

[0024] Figure 3 It is a structural schematic diagram of the first LCD light switch in an embodiment;

[0025] Figure 4 It is a schematic diagram of the relationship between the polarization light transmission axes on the display plane of the first LCD light switch in an embodiment;

[0026] Figure 5 It is a structural schematic diagram of the second LCD light switch in an embodiment;

[0027] Figure 6 It is a schematic diagram of the relationship between the polarization light transmission axes on the display plane of the second LCD light switch in an embodiment;

[0028] Figure 7 It is an LCD screen schematic diagram of a single AA area in an embodiment;

[0029] Figure 8 It is an LCD screen schematic diagram of three AA areas in an embodiment. DETAILED DESCRIPTION

[0030] In order to facilitate the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The preferred embodiments of the present application are shown in the drawings. However, the present application can be realized in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] It is to be noted that when an element is referred to as being "connected" or "coupled" to another element, it can be directly connected or coupled to the other element or intervening elements can be present. In addition, the term "connected" or "coupled" as used herein can refer to optical connection, electrical connection, magnetic connection, or any combination thereof.

[0032] Unless otherwise defined, 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 in the description of the application herein 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.

[0033] Laser TV is the fourth generation of TV that can watch broadcast programs and on-demand Internet content. Compared with the traditional TV, it has five advantages of high cost performance, eye protection, high spectral purity, energy saving and environmental protection, and low cost. Figure 1 As shown in the general optical path principle diagram of the host of the laser TV. The existing laser TV generally has 3D display function, which mainly realizes 3D effect by improving the rapid refresh rate of the picture (usually needs to reach 120Hz), belongs to active 3D technology, also called time division light shielding technology or liquid crystal time division technology. The specific implementation process can be briefly described as follows: when the 3D signal is input into the display device (such as display, projector, etc.), the image is realized in the format of frame sequence, and the left and right frames are alternately generated, and these frame signals are transmitted out by infrared emitter or Bluetooth and other wireless ways; the 3D glasses responsible for receiving these frame signals refresh and synchronize to realize the left and right eye watching corresponding images, and keep the same frame number as 2D video, so that the two eyes of the audience see different pictures switched quickly, and the illusion (the effect cannot be taken by camera) is generated in the brain, so that the audience can watch the stereoscopic image.

[0034] However, this kind of 3D display method also has obvious display performance defects, which affects the viewing experience. For example, the picture flickers easily affected by the daylight lamp, the 3D glasses open and close and the TV are not completely synchronized, and the ghosting appears, so that the eyes of the audience are easily tired. In addition, after the user wears the matching shutter 3D glasses, the picture brightness will be greatly reduced, and each eye can only get about 40% of the light, and because of the frequency switching, long-term use will also cause the audience to easily appear dizziness during watching.

[0035] To solve the problems existing in the traditional 3D display technology of laser TV, the application provides the following technical solutions:

[0036] Please refer to Figure 2In one aspect, a 3D laser projection TV 100 is provided, which comprises a laser signal source 12, a beam splitting module 14 and an LCD light switch module 16 arranged in sequence. The LCD light switch module 16 comprises a first LCD light switch 162 and a second LCD light switch 164 arranged side by side. 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 by the laser signal source 12 into two beams, and project one of the two beams to the first LCD light switch 162 and the other beam to the second LCD light switch 164. The first LCD light switch 162 and the second LCD light switch 164 are configured to display the pictures corresponding to the two beams, respectively.

[0037] It can be 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 TV main machine available on the market, as long as it can emit the required TV laser signal for projection display. The beam splitting module 14 is a light splitting module capable of splitting the laser beam emitted by the light source into two beams, such as any type of beam splitter or device that can split one beam of laser into two beams of the same or approximately the same laser. The LCD light switch is a polarized LCD screen configured to receive the laser signal emitted after splitting by the beam splitting module 14 and display the display picture corresponding to the signal. The two LCD light switches can be the same type of LCD screen or different types of LCD screen, and the polarization direction thereof is not limited herein, as long as the two LCD light switches can respectively transmit the projected laser beams to form two display pictures with orthogonal polarization directions.

[0038] It should be noted that the arrangement distance between the beam splitting module 14 and the laser signal source 12 and the two LCD light switches can be set by those skilled in the art according to the projection needs of the laser TV main machine in the art, as long as an effective and reliable projection light path can be formed. The two LCD light switches can be arranged side by side in the manner of splicing screens, or can be directly spliced with a certain spacing (the specific spacing can be determined according to the size of the two screens and the size of the viewing distance), as long as the pictures displayed by the two screens can be effectively superimposed to form a 3D picture through the 3D glasses worn by the audience.

[0039] The 3D display function of the present application relative to the traditional DLP technology is a laser projection technology based on LCD light switch. The laser emitted by the laser signal source 12 is split into two beams with different polarization directions and projected onto two LCD light switches. Since the polarization directions of the two LCD light switches are orthogonal, for example, but not limited to, the polarization light transmission direction of one LCD light switch is horizontal (relative to the horizontal plane), and the polarization light transmission direction of the other LCD light switch is vertical (relative to the horizontal plane), or the polarization light transmission direction of one LCD light switch is positive 45 degrees (relative to the horizontal plane), and the polarization light transmission direction of the other LCD light switch is negative 45 degrees (relative to the horizontal plane), therefore, the polarization directions of the two LCD light switches are also orthogonal.

[0040] In this way, when the audience wears polarized glasses (i.e. ordinary 3D glasses on the market (relative to the shutter 3D glasses required for the traditional active 3D technology described above), such as the 3D glasses provided by general 3D cinemas), they can see the pictures displayed on the two LCD light switches and synthesize them in the brain to form a 3D effect (practice has shown that this effect is the same as the 3D effect of a 3D cinema). With this 3D display method, there is no need for high-frequency refreshing and offset display of images in the traditional laser television 3D mode, and there is no need for shutter 3D glasses. The 3D mode switching is more natural and has less restrictions on 3D image resources, the image is smoother, and the advantages of LCD screen display can be fully utilized. There is no problem of asynchronization between image refresh frequency and shutter 3D glasses, signal delay, etc., and the visual damage caused by high-frequency switching can be well eliminated, avoiding the adverse experiences such as eye fatigue and dizziness of the audience after long-term use.

[0041] By splitting the laser emitted by the laser signal source 12 into two beams with a beam splitting module 14 and projecting them through two LCD light switches with orthogonal polarization directions, the two beams corresponding to the display pictures are projected onto the two LCD light switches to form two display pictures with orthogonal polarization directions. In this way, the audience can see the 3D picture formed by the superposition of the two display pictures through ordinary 3D glasses. The 3D mode switching is more natural, the image is smoother, and there is no need for high-frequency refreshing of images in the traditional 3D display method. The anti-fatigue and anti-dazzling effects are better, and the 3D display performance is greatly improved.

[0042] In one embodiment, the first LCD light switch 162 and the second LCD light switch 164 are LCD screens with the same architecture and size. The CF side glass of the two LCD screens has no photoresist.

[0043] It can be understood that in the embodiment, two LCD screens with the same architecture, the same size and no photoresist on the screen CF side glass can be adopted, and only the polarization axes of the two LCD screens are required to be orthogonal to each other. The polarization type of the two LCD screens can not be limited, and can be selected and determined according to the projection display effect.

[0044] In application, the two LCD screens can be independently powered, or can be synchronously powered by a unified power supply. In addition, the two LCD screens can be but not limited to parallelly installed and arranged through the same screen frame, and the specific determination can be made according to the needs of the viewing scene.

[0045] By applying two LCD screens with the same specifications and orthogonal polarization directions, the two display pictures of the projection can be made consistent except for the orthogonal polarization directions, so as to further improve the quality of the 3D display picture.

[0046] In one embodiment, the first LCD light switch 162 and the second LCD light switch 164 are both circularly polarized screens. Optionally, in the embodiment, two circularly polarized screens (CPLP) with the same specifications and orthogonal polarization directions are adopted for laser projection display, so that the overall picture quality of 3D projection display can be improved based on the excellent display performance of the circularly polarized screen (CPLP), and the 3D display performance and effect can be further improved.

[0047] In one embodiment, the first LCD light switch 162 and the second LCD light switch 164 are both linearly polarized screens. Optionally, in the embodiment, two linearly polarized screens with the same specifications and orthogonal polarization directions can also be selected for laser projection display, so that the required 3D projection display quality can be provided based on the LCD display performance of the linearly polarized screen, and better 3D display performance and effect can be obtained.

[0048] Please refer to Figure 3 and Figure 4 In one embodiment, the first LCD light switch 162 includes a first LCD screen 1622, a polarization assembly A and a polarization assembly B. The polarization assembly A and the polarization assembly B are respectively attached to the two side main planes of the first LCD screen 1622. The polarization assembly A is a polarizer or a polarization grating with a horizontal polarization light transmission axis. The polarization assembly B is a polarizer or a polarization grating with a vertical polarization light transmission axis.

[0049] In this embodiment, the first LCD screen 1622 can be any type of LCD screen commonly used in the art. Taking a TFT (Thin Film Transistor) screen as an example, it includes a TFT layer, an LC (Liquid Crystal) layer, and a CF (Color Filter) layer, among other main components (the specific screen structure can be understood by referring to the structure of LCD screens in the art, and will not be elaborated here). The two polarizing components A and B can both be polarizers or polarizing gratings, see [reference]. Figure 3 As shown, from left to right, if the polarization transmission axis of the polarizing component A on the TFT side is horizontal (with the horizontal plane as a reference), then the polarization transmission axis of the polarizing component B on the CF side is vertical (with the horizontal plane as a reference). Alternatively, if the polarization transmission axis of the polarizing component A on the TFT side is vertical (with the horizontal plane as a reference), then the polarization transmission axis of the polarizing component B on the CF side is horizontal (with the horizontal plane as a reference). Other polarization angles can also be used according to actual display and viewing needs. Regardless of the polarization direction setting method, the polarization direction of the corresponding second LCD light switch 164 should remain orthogonal to the polarization direction of the first LCD light switch 162.

[0050] like Figure 4 As shown, this is an example of the relationship between the polarization transmission axes of the two polarizing components A and B on the display plane of the first LCD screen 1622. By adopting the above-described LCD architecture, viewers can watch with ordinary 3D glasses, achieving a better 3D effect and effectively reducing the overall application cost compared to the 3D mode of traditional laser TVs.

[0051] Please see Figure 5 and Figure 6 In one embodiment, the second LCD optical switch 164 includes a second LCD screen 1642, a polarizing component C, and a polarizing array. Polarizing component C and polarizing component D are respectively attached to the two main planes on either side of the second LCD screen 1642. Polarizing component C is a polarizer or polarizing grating with a polarization axis perpendicular to the polarization transmission axis. Polarizing component D is a polarizer or polarizing grating with a polarization axis horizontal to the polarization transmission axis.

[0052] In this embodiment, the second LCD screen 1642 can be any type of LCD screen commonly used in the art. Taking a TFT screen as an example, it includes main components such as a TFT layer, an LC layer, and a CF layer (the specific screen structure can be understood by referring to the structure of LCD screens in the art, and will not be elaborated here). The two polarizing components C and D can both be polarizers or polarizing gratings, see [reference]. Figure 5As shown, from left to right, if the polarization transmission axis of the polarizing component C on the TFT side is vertical (with the horizontal plane as a reference), then the polarization transmission axis of the polarizing component D on the CF side is horizontal (with the horizontal plane as a reference). Alternatively, if the polarization transmission axis of the polarizing component C on the TFT side is horizontal (with the horizontal plane as a reference), then the polarization transmission axis of the polarizing component D on the CF side is vertical (with the horizontal plane as a reference). Other polarization angles can also be used according to actual display and viewing needs. Regardless of the polarization direction setting method, the polarization direction of the first LCD light switch 162 should remain orthogonal to the polarization direction of the second LCD light switch 164.

[0053] It is understood that the first LCD light switch 162 and the second LCD light switch 164 can both adopt the same architecture as described above. For example, but not limited to: from left to right, if the polarization light transmission axis of the polarizing component C on the TFT side in the second LCD light switch 164 is horizontal (with the horizontal plane as a reference), then the polarization light transmission axis of the polarizing component D on the CF side is vertical (with the horizontal plane as a reference). If the polarization light transmission axis of the polarizing component A on the TFT side in the first LCD light switch 162 is vertical (with the horizontal plane as a reference), then the polarization light transmission axis of the polarizing component B on the CF side is horizontal (with the horizontal plane as a reference).

[0054] like Figure 6 As shown, this is an example of the relationship between the polarization transmission axes of the two polarizing components C and D on the display plane of the second LCD screen 1642. By adopting the above-described LCD architecture, viewers can watch with ordinary 3D glasses, achieving a better 3D effect and effectively reducing the overall application cost compared to the 3D mode of traditional laser TVs.

[0055] Please see Figure 7 and Figure 8 In one embodiment, either of the two LCD screens includes an LCD screen with a single effective display area or three independent effective display areas.

[0056] It is understandable that the effective display area, also known as the Active Area (AA area), can be a single effective display area on an LCD screen. For example, an AA area can be displayed on two separate LCD screens. Figure 7 As shown. In other embodiments, the LCD screen may not be limited to a single AA area, for example, as Figure 8As shown, three AA areas are displayed on each of the two LCD screens, so that the display quality can be improved or multi-window display can be performed according to the viewing needs. Those skilled in the art can also select LCD screens with other numbers of AA areas according to actual projection and viewing needs.

[0057] In one embodiment, the beam splitting module 14 is a beam splitter. It can be understood that in this embodiment, a beam splitter commonly used in the art is preferably used to achieve the required splitting of the light source, and the specific type and size of the beam splitter can be selected according to the needs of the projection light path, as long as it can split one light source laser into two lasers of the same or approximately the same size, which are respectively projected onto two LCD screens for effective projection.

[0058] 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 beam splitter can also be provided with a positioning portion, so as to be fixed to the laser host or the mounting frame of the two display screens through the positioning portion. For example, in other embodiments, a special or general positioning portion can also be provided on the mounting frame of the laser host or the display screen for installing and fixing the beam splitter in the application scenario.

[0059] By applying the beam splitter commonly used in the art to split the outgoing laser beam of the laser signal light source into two beams, which are respectively projected onto two LCD screens with orthogonal polarization directions, the display pictures of different polarization directions are realized, the 3D mode switching of the laser television is simpler and more convenient, and the traditional complex control of the laser signal source 12 is not required, the 3D display implementation cost is low and the performance is better.

[0060] In one embodiment, the laser signal source 12 includes an RGB three-color laser source or a light source formed by a single-color laser exciting a rotating color wheel of fluorescent powder.

[0061] It can be understood that in this embodiment, the laser signal source 12 can be an R / G / B three-color laser source in the art, or a light source formed by a single-color laser exciting a rotating color wheel of fluorescent powder. It should be noted that in the above embodiment, it is not limited to using these two kinds of laser light sources. By applying the above 3D display implementation method, more types of 3D image resources can be compatible, and the limitation on the light source is less. The 3D display effect can be realized without high-frequency refresh misalignment display of the light source, and the display cost is lower.

[0062] On the other hand, a laser television system is also provided, which includes a 3D glasses and the above-mentioned 3D laser projection television 100. The 3D glasses are used to obtain the 3D superimposed picture of the two pictures displayed by the first LCD light switch 162 and the second LCD light switch 164 of the 3D laser projection television 100, respectively.

[0063] It is understood that, in this embodiment, the explanation and description of the 3D laser projection television 100 can be found in the corresponding explanations and descriptions in the various embodiments of the 3D laser projection television 100 described above, and will not be repeated in this embodiment. The 3D glasses are polarized glasses constructed with polarizing films or polarizing gratings as polarizing components, which are ordinary 3D glasses compared to the shutter-type 3D glasses required for the aforementioned traditional active 3D technology, and their cost is usually much lower than that of the aforementioned shutter-type 3D glasses.

[0064] Specifically, the laser television system provided in this application, compared to traditional DLP technology-based 3D display laser television systems, is a laser projection technology based on LCD optical switches. It splits the laser beam emitted from the laser signal source 12 onto two LCD optical switches with different polarization directions. The corresponding display image is projected onto the two LCD optical switches. Since the polarization directions of the two LCD optical switches are orthogonal—for example, but not limited to, if the polarized light transmission direction of one LCD optical switch is horizontal (relative to the horizontal plane), then the polarized light transmission direction of the other LCD optical switch is vertical (relative to the horizontal plane); or if the polarized light transmission direction of one LCD optical switch is +45 degrees (relative to the horizontal plane), then the polarized light transmission direction of the other LCD optical switch is -45 degrees (relative to the horizontal plane)—the polarization directions of the images projected onto the two LCD optical switches will also be mutually orthogonal.

[0065] Thus, when viewers wear polarized glasses (i.e., the aforementioned ordinary 3D glasses on the market), they can see the images displayed by two LCD light switches, which are then combined in their brains to form a 3D effect (practice has shown that this effect is the same as that of a 3D cinema). This 3D display method eliminates the need for the high-frequency image refresh misalignment found in traditional laser TV 3D modes, and also eliminates the need for shutter-type 3D glasses. 3D mode switching is more natural and has fewer limitations on 3D image resources, resulting in smoother images. It fully utilizes the advantages of LCD screens, eliminating issues such as asynchronous image refresh rates and signal delays with shutter-type 3D glasses. It effectively eliminates visual damage caused by high-frequency switching and avoids eye fatigue and dizziness that can occur with prolonged use.

[0066] The 3D laser projection television 100 is matched with the common 3D glasses, the laser signal source 12 is divided into two beams by the beam splitting module 14, and the two beams are projected on the two LCD light switches with orthogonal polarization directions, so that the two display pictures corresponding to the two beams form two display pictures with orthogonal polarization directions, and the audience can see the 3D picture formed by the superposition of the two display pictures through the common 3D glasses, the 3D mode switching is more natural, the image is more smooth, the image high-frequency refreshing mode of the traditional 3D display mode is not needed, the fatigue and dazzling effects are better, and the 3D display performance is greatly improved.

[0067] In addition, the traditional laser television 3D mode needs to be matched with shutter 3D glasses, the laser television system of the application can directly use the common 3D glasses to achieve a better 3D viewing effect, the cost is lower, the visual damage can be effectively avoided, so that the laser television system can be further popularized and popularized, the laser television system has better economic benefits, and the user experience is better.

[0068] The technical features of the above-described embodiments can be combined arbitrarily, and to make the description simple, all possible combinations of the technical features in the above-described embodiments are not described, however, as long as the combinations of the technical features do not exist contradictory, it should be considered that the combinations are within the scope of the present application.

[0069] The above-described embodiments only express several implementation manners of the application, the description is more specific and detailed, but it should not be understood as a limitation on the patent application scope. It should be pointed out that for ordinary skilled in the art, without departing from the concept of the application, a number of modifications and improvements can be made, which are within the protection scope of the application. Therefore, the patent protection scope of the application should be subject to the appended claims.

Claims

1. A 3D laser projection television, characterized by, The 3D laser projection television comprises a laser signal source, a beam splitting module and an LCD light switch module arranged in sequence, the LCD light switch module comprises two LCD light switches, the two LCD light switches are a first LCD light switch and a second LCD light switch arranged side by side, and the polarization directions of the first LCD light switch and the second LCD light switch are orthogonal. The beam splitting module is used for splitting the signal laser emitted by the laser signal source into two beams of the same or approximately same size, projecting one of the two beams to the first LCD light switch and the other to the second LCD light switch. The first LCD light switch and the second LCD light switch are respectively used for displaying two corresponding pictures of the two beams, forming two display pictures with orthogonal polarization directions, and the two display pictures are superimposed to form a 3D picture.

2. The 3D laser projection TV of claim 1, wherein, The first LCD light switch and the second LCD light switch are LCD screens with the same architecture and size, and the CF side glass of the two LCD screens is free of photoresist.

3. The 3D laser projection TV of claim 2, wherein, The first LCD light switch and the second LCD light switch are circularly polarized screens.

4. The 3D laser projection TV of claim 2, wherein, The first LCD light switch and the second LCD light switch are linearly polarized screens.

5. The 3D laser projection TV of claim 3, wherein, The first LCD light switch comprises a first LCD screen, a polarizing component A and a polarizing component B, and the polarizing component A and the polarizing component B are respectively attached to the two side main planes of the first LCD screen. The polarizing component A is a polarizing plate or a polarizing grating with a horizontal polarization light transmission axis, and the polarizing component B is a polarizing plate or a polarizing grating with a vertical polarization light transmission axis.

6. The 3D laser projection television according to claim 3 or 5, characterized in that, The second LCD light switch comprises a second LCD screen, a polarizing component C and a polarizing component D, and the polarizing component C and the polarizing component D are respectively attached to the two side main planes of the second LCD screen. The polarizing component C is a polarizing plate or a polarizing grating with a vertical polarization light transmission axis, and the polarizing component D is a polarizing plate or a polarizing grating with a horizontal polarization light transmission axis.

7. The 3D laser projection TV of claim 2, wherein, Any of the two LCD screens comprises a single effective display area or a LCD screen with three independent effective display areas.

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

9. The 3D laser projection TV of claim 1, wherein, The laser signal source comprises an RGB three-primary color laser source or a single-color laser excitation fluorescent powder combined with a rotating color wheel.

10. A laser television system, characterized by, The 3D laser projection television comprises a 3D glasses and the 3D laser projection television according to any one of claims 1 to 9, and the 3D glasses are used for obtaining a 3D superimposed picture of two pictures displayed by the first LCD light switch and the second LCD light switch of the 3D laser projection television.

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