CN219958061U

CN219958061U - Projection apparatus

Info

Publication number: CN219958061U
Application number: CN202321182616.6U
Authority: CN
Inventors: 虞涛
Original assignee: Yibin Jimi Photoelectric Co Ltd
Current assignee: Yibin Jimi Photoelectric Co Ltd
Priority date: 2023-05-16
Filing date: 2023-05-16
Publication date: 2023-11-03
Anticipated expiration: 2033-05-16

Abstract

The utility model discloses projection equipment, and relates to the technical field of photoelectricity. The utility model uses one super-structure lens to replace a plurality of traditional optical lenses to realize the focusing function, thereby reducing the volume of the product. In addition, because the super-structure lens can realize focusing on different wavelengths at different positions in space, the light with different wavelengths emitted by the light source device can be guided to corresponding pixel units on the liquid crystal panel through the super-structure lens, and therefore the use of the color filter element can be reduced to improve the brightness.

Description

Projection apparatus

Technical Field

The utility model relates to the technical field of photoelectricity, in particular to projection equipment.

Background

Lenses are basic optical elements, which are made according to the refraction law of light, and are widely used in the field of optoelectronics technology, such as cameras, projectors, microscopes, etc. In conventional projection devices, a plurality of lenses are typically stacked together to perform shaping, focusing, and other functions.

Currently, projectors are widely used in a variety of contexts, such as office briefs, playing movies, device art, and the like. Most projectors are based on spatial light modulators (SLM, spatial Light Modulator), which mainly include transmissive LCD (Liquid Crystal Display) projection, reflective LCoS (Liquid Crystal on Silicon ) projection, and reflective DMD (Digital Micro-Mirror Device) projection. In recent years, LCD projection has been widely used due to the advantage of low cost. While LCD architectures typically use color filters for color matching, this can lead to brightness loss problems.

Disclosure of Invention

In view of the above, the present utility model provides a projection apparatus, which can reduce the product volume and reduce the light loss.

In a first aspect, the present utility model provides a projection apparatus comprising:

the light source device is used for emitting at least first illumination light, wherein the first illumination light at least comprises first wave band light and second wave band light, and the wave bands of the first wave band light and the second wave band light are different;

the first liquid crystal panel is used for modulating the first illumination light to form first modulated light, and at least comprises a first pixel unit and a second pixel unit, wherein the first pixel unit is used for processing the first band light, and the second pixel unit is used for processing the second band light;

the first super-structure lens is positioned between the light source device and the first liquid crystal panel and used for guiding the first wave band light to enter the first pixel unit of the first liquid crystal panel and guiding the second wave band light to enter the second pixel unit of the first liquid crystal panel.

In a possible implementation manner, the light source device is further configured to emit second illumination light, where the second illumination light includes at least fourth band light, and the projection device further includes:

the second liquid crystal panel is used for modulating the second illumination light to form second modulated light, and at least comprises a fourth pixel unit, wherein the fourth pixel unit is used for processing the fourth wave band light;

and the light combining element is used for combining the first modulated light and the second modulated light and then emitting the combined light.

In a possible implementation manner, the second illumination light further includes a fifth band light, and the fourth band light and the fifth band light have different bands; the second liquid crystal panel further includes a fifth pixel unit, the fifth pixel unit is configured to process the fifth band light, and the projection device further includes:

the second super-structure lens is positioned between the light source device and the second liquid crystal panel and is used for guiding the light of the fourth wave band to enter a fourth pixel unit of the second liquid crystal panel and guiding the light of the fifth wave band to enter a fifth pixel unit of the second liquid crystal panel.

In a possible implementation, the first band of light and the fourth band of light comprise light of the same band of light.

In a possible implementation manner, the first band light, the second band light, the fourth band light and the fifth band light may synthesize white light, and the first band light and the fourth band light include light of a same band, and the bands of the second band light and the fifth band light are different or the same.

In a possible implementation, the first band of light and the fourth band of light each comprise green light.

In a possible implementation manner, the first illumination light further includes third-band light, and the third-band light is different from the bands of the first-band light and the second-band light; the first liquid crystal panel further comprises a third pixel unit, and the third pixel unit is used for processing the third wave band light; the first super-structure lens is further used for guiding the light of the third wave band to enter a third pixel unit of the first liquid crystal panel;

the second illumination light further includes sixth-band light, which is different from the fourth-band light and the fifth-band light in both bands; the second liquid crystal panel further comprises a sixth pixel unit, and the sixth pixel unit is used for processing the sixth band light; the second super-structure lens is further used for guiding the light of the sixth wave band to enter a sixth pixel unit of the second liquid crystal panel;

wherein the first band light, the second band light and the third band light may synthesize white light, and the fourth band light, the fifth band light and the sixth band light may synthesize white light.

In a possible implementation manner, the first band light and the fourth band light each include green light, the second band light and the fifth band light each include red light, and the third band light and the sixth band light each include blue light.

In a possible implementation manner, the light source device includes a first light source and a second light source, the first light source is used for emitting the first illumination light, the second light source is used for emitting the second illumination light, the first super-structure lens is located between the first light source and the first liquid crystal panel, and the second super-structure lens is located between the second light source and the second liquid crystal panel; or,

the light source device comprises a third light source and a guiding device, wherein the emergent light of the third light source comprises the first illumination light and the second illumination light, and the guiding device is used for dividing the emergent light of the third light source into the first illumination light and the second illumination light, guiding the first illumination light to be incident to the first super-structure lens and guiding the second illumination light to be incident to the second super-structure lens.

In a possible implementation manner, the first liquid crystal panel is located at a first position, and the second liquid crystal panel is located at a second position, so that pixels in a projection picture formed by the first modulated light and corresponding pixels in a projection picture formed by the second modulated light deviate from a preset distance.

In a possible implementation manner, the first liquid crystal panel alternately displays color field images of the first band light and the second band light of the input signal, and the second liquid crystal panel correspondingly alternately displays color field images of the fourth band light and the fifth band light of the input signal.

In a possible implementation manner, the first liquid crystal panel alternately displays color field images of the first band light, the second band light and the third band light of the input signal, and the second liquid crystal panel correspondingly alternately displays color field images of the fourth band light, the fifth band light and the sixth band light of the input signal.

The utility model uses one super-structure lens to replace a plurality of traditional optical lenses to realize the focusing function, thereby reducing the volume of the product. In addition, because the super-structure lens can realize focusing on different wavelengths at different positions in space, the light with different wavelengths emitted by the light source device can be guided to corresponding pixel units on the liquid crystal panel through the super-structure lens, and therefore the use of the color filter element can be reduced to improve the brightness.

Drawings

FIG. 1 is a functional block diagram of a conventional projection device;

FIG. 2 is a schematic diagram of a conventional projection apparatus;

fig. 3 is a schematic structural diagram of a projection device according to an embodiment of the present utility model;

fig. 4 is a schematic structural diagram of a super-structured lens according to an embodiment of the present utility model;

FIG. 5 is a schematic diagram of another projection apparatus according to an embodiment of the present utility model;

FIG. 6 is a schematic diagram of a projection apparatus according to another embodiment of the present utility model;

Detailed Description

In order to better understand the technical solutions of the present utility model, the following description will clearly and completely describe the technical solutions of the embodiments of the present utility model, and it is obvious that the described embodiments are only some embodiments of the present utility model, not all embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the scope of the utility model. While the present disclosure has been described in terms of an exemplary embodiment or embodiments, it should be understood that each aspect of the disclosure may be separately provided as a complete solution. The following embodiments and features of the embodiments may be combined with each other without conflict.

In embodiments of the utility model, the word "comprising" means that two or more than two, including "or" comprising ", and the like, means that elements or items preceding the word are included in the word, and equivalents thereof, but does not exclude other elements or items. It is to be understood that the terms "upper," "lower," "inner," "outer," "front," "back," and the like are merely used for convenience in describing the utility model and to simplify the description, and are not to be construed as implying or indicating a limitation on the utility model.

In order that the utility model may be fully understood, a detailed description will be provided below in order to illustrate the technical aspects of the utility model. Preferred embodiments of the present utility model are described in detail below, however, the present utility model may have other embodiments in addition to these detailed descriptions.

Fig. 1 is a schematic functional block diagram of a conventional projection device. As shown in fig. 1, the projection device includes an image processor 101 and a projection light engine 102. Wherein:

the image processor 101 may be a microcontroller, a dedicated image processing chip, etc., and the microcontroller may be an ARM chip, a micro control unit (Microcontroller Unit; MCU), etc.; the dedicated image processing chip may be an image signal processor (Image Signal Processing, ISP), a graphics processor (graphics processing unit, GPU), an embedded neural network processor (neural-network process units, NPU), or the like. The image processor 101 may be used for video decoding, image quality processing, and the like.

The projection light engine 102 may include a driver chip, a spatial light modulator, a light source, and the like. Wherein the light source may include a laser light source, an LED light source, a fluorescent light source, etc.; the spatial light modulator may be a digital micromirror device (Digtial Micromirror Devices, DMD), a transmissive liquid crystal device (Liquid Crystal Display, LCD), a reflective liquid crystal device (Liquid Crystal on Silicon, LCOS), or the like, for modulating light source light to generate image light; the driver chip corresponds to a spatial light modulator, for example, a digital micromirror device may be driven with a digital light processing element (Digital Light Processing, DLP). The projection light machine 102 is used for projecting an image to be projected into a projection screen.

In some embodiments, the projection device further includes a central controller 103, which may be a CPU, ARM, MCU or like controller, of one or more processing cores. The central controller 103 is a control center of the projection device, and may run or execute software programs and/or an operating system stored in the storage module 104 and invoke data stored in the storage module 104 using various interfaces and lines to connect various parts of the entire projection device. Alternatively, the image processor 101 and the central controller 103 may be integrated as one processor.

In some embodiments, the projection device further includes a storage module 104, an input module 105, and components of a communication module 106, a power supply 107, and the like, of one or more computer-readable storage media. It will be appreciated by those skilled in the art that the projection device structure shown in FIG. 1 is not limiting of the projection device and may include more or fewer components than shown, or may combine certain components, or a different arrangement of components. Wherein:

the memory module 104 may be used to store software programs and an operating system, and the central controller 103 executes various functional applications and data processing by running the software programs and the operating system stored in the memory module 104. The storage module 104 may mainly include a storage program area and a storage data area, wherein the storage program area may store an operating system, an application program (such as a sound playing function, an image playing function, etc.) required for at least one function, and the like; the storage data area may store data created according to the use of the projection device, etc. In addition, the memory module 104 may include high-speed random access memory, and may also include non-volatile memory, such as at least one magnetic disk storage device, flash memory device, or other volatile solid-state storage device. Accordingly, the memory module 104 may also include a memory controller to provide access to the memory module 104 by the central controller 103.

The projection device may further comprise an input module 105, which input module 105 may be used to receive entered numerical or character information and to generate remote control, keyboard, mouse, joystick, optical or trackball signal inputs related to user settings and function control.

The projection device may also include a communication module 106, and in some embodiments the communication module 106 may include a wireless module, through which the projection device may wirelessly transmit over short distances, thereby providing wireless broadband internet access to the user. For example, the communication module 106 may be used to assist a user in accessing streaming media, and the like.

The projection device further includes a power supply 107 for powering the various components, and in some embodiments, the power supply 107 may be logically connected to the central controller 103 via a power management system, such that charge, discharge, and power consumption management functions are performed by the power management system. The power supply 107 may also include one or more of any of a direct current or alternating current power supply, a recharging system, a power failure detection circuit, a power converter or inverter, a power status indicator, and the like.

Fig. 2 is a schematic structural diagram of a conventional projection apparatus. As shown in fig. 2, the projection apparatus includes a light source device 201, an illumination optical system 202, and an imaging system 203. Wherein the light source device 201 comprises one or more light sources; the illumination optical system 202 includes an optical element for processing light emitted from the light source device 201; the light beam emitted from the light source device 201 is irradiated to a spatial light modulator (not shown) via an illumination optical system 202, and the spatial light modulator irradiates its incident light into an imaging system 203, and finally images the image light onto a projection object such as a screen, and the imaging system 203 is typically a lens system, such as a projection lens.

The projection apparatus may further include a light source control module (not shown in the figure) that controls the operation of one or more light sources in the light source device 201 such that the light source device 201 emits light of a prescribed wavelength band required when generating an image. Further, the light source device 201, the illumination optical system 202, and the imaging system 203 may be included in the projection light machine 102 (refer to fig. 1).

Fig. 3 is a schematic structural diagram of a projection device according to an embodiment of the present utility model. As shown in fig. 3, the projection apparatus includes a light source device 301, a super-structured lens 302, a liquid crystal panel 303, and a projection lens 304, wherein outgoing light of the light source device 301 is guided to the liquid crystal panel 303 through the super-structured lens 302, and the liquid crystal panel 303 irradiates its incoming light into the projection lens 304, and finally images image light onto a projection screen.

The light source device 301 is configured to emit illumination light, where the illumination light may include a single wavelength band or may include a plurality of different wavelength bands. The light source device 301 may be a single light source, or may include a plurality of light sources, and the light source may be a laser light source, an LED light source, a fluorescent light source, or the like. Further, the light source may be a single light emitting element or an array of light emitting elements, and the array of light emitting elements may include light emitting elements of different colors, for example, the light source is a multicolor laser, the light source is an array of light emitting elements including multiple lasers, for example, the light source may include a blue laser and a red laser, or include a blue laser and a green laser, or include a blue laser, a red laser and a green laser at the same time.

Optionally, the light source includes a light source portion, the light source portion including a substrate and a plurality of light emitting elements. The substrate has a quadrangular shape such as a substantially square shape or a substantially rectangular shape in plan view. The substrate has a mounting surface on which the light emitting element is mounted, and the mounting surface is, for example, a flat surface. Further, a heat radiation member such as a radiator may be provided on a surface opposite to the mounting surface of the substrate. The substrate is formed of a material having high heat dissipation, for example, a metal material. The plurality of light emitting elements are arranged in an array with respect to the mounting surface of the substrate. The light emitting element is a laser light source and has an emission surface for emitting laser light; or may be an LED light source. The light source can be a single red, green and blue LED light source, an LED light source array or a COB light source; but also blue LED sources and yellow sources.

The super-structured lens 302 may also be called a super-lens (metalens), and is made of an optical element focusing light on a super-surface, and the super-surface mainly refers to a two-dimensional metamaterial composed of nano-structures with ultra-thin thickness, and the nano-structures composing the super-surface may be structures such as holes, slits or protrusions. The super-structured lens 302 is further described below using the example in which the nano-structures of the super-surface are nano-pillars.

As shown in fig. 4, the super-structured lens 302 includes a substrate 21 and a plurality of nano-pillars 22, the substrate 21 and the plurality of nano-pillars 22 being formed of a material having high transmittance for a wavelength band of a light beam. If the wavelength of the light beam is 445nm, for example, the material of the substrate 21 and the plurality of nano-pillars 22 may be, for example, optical glass, silicon oxide (SiO 2), titanium oxide (TiO 2), or the like. The substrate 21 and the nano-pillars 22 may be formed integrally with each other, or may be formed independently of each other, and bonded when aligned in the X-direction and the Y-direction. The plurality of nanopillars 22 are arranged on the surface of the substrate 21 with a distance d therebetween. That is, the widths t, w of the nanopillars adjacent to each other on the XY plane may be the same size as each other or may be different sizes from each other. The nano-pillars are adjusted to realize the change of the light transmission phase from 0 to 2, the nano-pillars are arranged in a corresponding mode to form the super-structure lens to realize the focusing function, and the light focusing is realized through the phases acquired by different corners of the nano-pillars.

The liquid crystal panel 303 is used to modulate illumination light to form modulated light. The liquid crystal panel 303 may include one or more pixel units, and different pixel units are used to process light of different wavelengths. As illustrated in fig. 4, the liquid crystal panel 303 includes a red pixel unit 31, a green pixel unit 32, and a blue pixel unit 33, wherein the red pixel unit 31 is used for processing red light, the green pixel unit 32 is used for processing green light, and the blue pixel unit 33 is used for processing blue light. The super-frame lens 302 guides the red light emitted from the light source device 301 to the red pixel unit 31, the green light emitted from the light source device 301 to the green pixel unit 32, and the blue light emitted from the light source device 301 to the blue pixel unit 33.

In this embodiment, the super-structured lens 302 has a function of focusing light of different wavelengths at different positions, and the super-structured lens 302 satisfies:

if the incident light includes light of three wavelengths, λ1 < λ2 < λ3

w(x1，λ1)＝w(x2，λ2)+k1π＝w(x3，λ3)+k2π

The rotation angle of the nanopillars of the super-structured lens 302 satisfies:

where xi denotes the position of the focal point of the incident wavelength λi, k1, k2 are integer constants, f denotes the focal length of the super-structured lens, and (x, y) denotes the coordinates of the nanopillar.

In other embodiments, the liquid crystal panel 303 may also include two pixel units, such as a red pixel unit and a green pixel unit, or a red pixel unit and a blue pixel unit, or a blue pixel unit and a green pixel unit, or a blue pixel unit and a yellow pixel unit, or the like.

Embodiments of the present utility model will be further described below with reference to a transmissive type super-structured lens and a 2LCD projection apparatus as examples. It should be understood that the projection device of the embodiments of the present utility model may also be a 3LCD, 2LCOS, or 3LCOS projection device, etc., and the super-structured lens may be a transmissive super-structured lens or a reflective super-structured lens.

Fig. 5 is a schematic structural diagram of another projection apparatus according to an embodiment of the present utility model. As shown in fig. 5, the projection apparatus includes a first light source 1, a first super-structure lens 3, a first LCD panel 4, a second light source 7, a second super-structure lens 9, a second LCD panel 10, a light combining element 5, and a projection lens 6. The illumination light emitted by the first light source 1 is guided to the first LCD screen 4 through the first super-structure lens 3, and modulated at the first LCD screen 4 to form first modulated light; the illumination light emitted by the second light source 7 is guided to the second LCD screen 10 through the second super-structure lens 9, and is modulated at the second LCD screen 10 to form second modulated light, and the first modulated light and the second modulated light are incident to the projection lens 6 after being combined by the light combining element 5.

The illumination light emitted from the first light source 1 includes at least two different wavelength bands of light, such as red light and green light, or blue light and yellow light, or three colors of light including red light, green light and blue light. As illustrated in fig. 5, the illumination light emitted from the first light source 1 includes red light, green light, and blue light, and the first super-structure lens 3 guides the red light to the red pixel unit of the first LCD panel 4, the green light to the green pixel unit of the first LCD panel 4, and the blue light to the blue pixel unit of the first LCD panel 4. In this embodiment, the color filter element may be omitted from the first LCD panel 4, so as to avoid light loss caused by the color filter element.

The illumination light emitted by the second light source 7 may include only light with a single wavelength band, or may include a plurality of different wavelength bands, for example, only light with a single wavelength band, so that the projection device may not include the second super-structure lens 9, and the second LCD screen 10 may be a single color screen or a black-and-white screen, for example, the illumination light emitted by the first light source 1 includes red light, green light, and blue light, and the illumination light emitted by the second light source 7 is green light, so as to enhance the projection brightness. With continued reference to fig. 5, the illumination light emitted from the second light source 7 includes red light, green light and blue light, and the second super-structure lens 9 directs the red light to the red pixel cell of the second LCD panel 10, the green light to the green pixel cell of the second LCD panel 10, and the blue light to the blue pixel cell of the second LCD panel 10.

Each pixel in the first LCD panel 4 comprises at least two sub-pixels (i.e. comprises two or three sub-pixels), and if the illumination light emitted by the first light source 1 comprises red light and green light, each pixel in the first LCD panel 4 comprises a red sub-pixel and a green sub-pixel; as another example, the illumination light emitted from the first light source 1 includes red light, green light, and blue light, and each pixel in the first LCD panel 4 includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. Each pixel in the second LCD panel 10 comprises at least one sub-pixel (i.e. comprises one or two or three sub-pixels), for example, the illumination light emitted from the second light source 7 comprises only blue light, and each pixel in the second LCD panel 10 comprises only blue sub-pixels; as another example, if the illumination light emitted from the second light source 7 includes blue light and green light, each pixel in the second LCD panel 10 includes a blue sub-pixel and a green sub-pixel; as another example, the illumination light emitted from the second light source 7 includes red light, green light, and blue light, and each pixel in the second LCD panel 10 includes a red sub-pixel, a green sub-pixel, and a blue sub-pixel. In this embodiment, the pixel size of the first LCD panel 4 is the same as the pixel size of the second LCD panel 10, for example, if each pixel in the first LCD panel 4 includes two sub-pixels and each pixel in the second LCD panel 10 includes one sub-pixel, the width and/or height of the two sub-pixels in the pixel of the first LCD panel 4 is equal to the width and/or height of the one sub-pixel in the pixel of the second LCD panel 10; if each pixel in the first LCD panel 4 comprises three sub-pixels and each pixel in the second LCD panel 10 comprises two sub-pixels, the width and/or height of the three sub-pixels in the pixels of the first LCD panel 4 is equal to the width and/or height of the two sub-pixels in the pixels of the second LCD panel 10. It should be appreciated that in other embodiments, each pixel in each LCD screen of a 2LCD projection device may include 1-3 sub-pixels, and similarly, each pixel in each LCD screen of a 3LCD projection device may include 1-3 sub-pixels, with the pixels of each LCD screen being the same size.

The following exemplary method of timing control is given:

the first projection sequence comprises a first sub-sequence, a second sub-sequence and a third sub-sequence through the first LCD panel 4, wherein the first sub-sequence lights the blue light source, the blue sub-pixel of the first LCD panel 4 is irradiated by the light passing through the first super-structure lens 4, the green sub-pixel of the first LCD panel 4 is irradiated by the light passing through the first super-structure lens 4 is lighted by the second sub-sequence, and the red sub-pixel of the first LCD panel 4 is lighted by the third sub-sequence; the second projection timing is illuminated via the second LCD screen 10, such as the first projection timing, the first projection timing and the second projection timing being either simultaneous or separated by an allowable time; the brightness is enhanced by emitting light twice in the time sequence range, and meanwhile, the color filter element is omitted, so that the light loss caused by the color filter element is avoided.

In the 2LCD projection device, the original Image may be divided into a first pixel Image and a second pixel Image, denoted as Image1 and Image2; wherein Image1 is input to the first LCD screen 4 and Image2 is input to the second LCD screen 10; the scan driver 1 of the first LCD panel 4 starts controlling the polarization splitting characteristics of the liquid crystal molecules line by line according to the image data of the first LCD panel 4; the scan driver 2 of the second LCD panel 10 starts controlling the polarization splitting characteristics of the liquid crystal molecules line by line according to the image data of the second LCD panel 10; the scanning time of the two paths of LCD is nearly equal or the time difference is smaller than a preset value; after the scan driver 1/2 finishes scanning, reset is performed according to Vblank.

In other embodiments, the illumination light emitted by the first light source 1 includes two wavelength bands of light, the illumination light emitted by the second light source 7 also includes two wavelength bands of light, and the illumination light emitted by the first light source 1 and the illumination light emitted by the second light source 7 may combine into white light, and the illumination light emitted by the two light sources includes the same wavelength band of light, so as to enhance the light in the wavelength band, for example, the illumination light emitted by the first light source 1 includes red light and green light, the illumination light emitted by the second light source 7 includes blue light and green light, and since the illumination light emitted by the two light sources includes green light, the projection brightness may be enhanced.

Alternatively, the first LCD panel 4 and the second LCD panel 10 may implement a difference in the first displacement value in physical space. Specifically, the first LCD panel 4 is located at the first position, and the second LCD panel 10 is located at the second position, so that the pixels in the projection screen formed by the first modulated light emitted from the first LCD panel 4 and the corresponding pixels in the projection screen formed by the second modulated light emitted from the second LCD panel 10 deviate from each other by a preset distance, for example, the pixels in the projection screen formed by the first modulated light and the pixels in the projection screen formed by the second modulated light may deviate from each other by a distance of half an amount of pixels in the row direction and the column direction, thereby realizing pixel expansion.

Further, with continued reference to fig. 5, the light emitting sides of the first light source 1 and the second light source 7 may further be provided with a first shaping lens 2 and a second shaping lens 8, respectively. Each light emitted from the light source unit enters the shaping lens. The shaping lens may have a plurality of collimating lenses. The collimator lenses may correspond to the light emitting elements in a one-to-one manner. Therefore, light emitted from each light emitting element is converted into parallel light by the corresponding collimator lens. Or the shaping lens comprises a focusing lens for shrinking the light beam; or the shaping lens comprises a microlens array for homogenizing and parallelizing the light beam.

Fig. 6 is a schematic structural diagram of a projection apparatus according to another embodiment of the present utility model. The embodiment shown in fig. 6 is different from the embodiment shown in fig. 5 in that the projection apparatus shown in fig. 6 only includes the first light source 1, and the illumination light emitted from the first light source 1 is split into two paths by the light splitting element 11, one path is incident on the first LCD panel 4 through the first super-structure lens 3, and the other path is incident on the second LCD panel 10 through the second super-structure lens 9. The rest of the structure of the embodiment shown in fig. 6 is the same as that of the embodiment shown in fig. 5, and will not be described again here.

The timing control method of this embodiment is exemplified as follows:

the projection sequence comprises a first sub-sequence, a second sub-sequence and a third sub-sequence, wherein the first sub-sequence lights the blue light source, the blue light is divided into two paths through the light splitting element 11, one path of blue light passes through the blue sub-pixels of the first super-structure lens 3 and the first LCD panel 4, and the other path of blue light passes through the blue sub-pixels of the second super-structure lens 9 and the second LCD panel 10. The second sub-timing lights up the green light source and the third sub-timing lights up the red light source, and the same applies. According to the embodiment, the light emergent rays corresponding to the three primary colors are added at the time sequence of the three primary colors, so that the brightness is enhanced, meanwhile, the color filter element is omitted, and the light loss caused by the color filter element is avoided.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any person skilled in the art will readily recognize that variations or substitutions are within the scope of the present utility model. Therefore, the protection scope of the present utility model shall be subject to the protection scope of the claims.

Claims

1. A projection device, comprising:

2. A projection device as claimed in claim 1, wherein the light source means is further adapted to emit second illumination light, the second illumination light comprising at least fourth band light, the projection device further comprising:

3. A projection device as claimed in claim 2, wherein said second illumination light further comprises fifth band light, said fourth band light and said fifth band light being different in band; the second liquid crystal panel further includes a fifth pixel unit, the fifth pixel unit is configured to process the fifth band light, and the projection device further includes:

4. A projection device as claimed in claim 2, wherein the first and fourth wavelength bands of light comprise the same wavelength band of light.

5. A projection device as claimed in claim 3, wherein said first band of light, said second band of light, said fourth band of light and said fifth band of light are synthesizable to white light, and wherein said first band of light and said fourth band of light comprise the same band of light, and wherein said second band of light and said fifth band of light are different or the same band of light.

6. A projection device as claimed in claim 4 or 5, wherein the first and fourth wavelength bands of light each comprise green light.

7. A projection device as claimed in claim 3, wherein said first illumination light further comprises third band light, said third band light being different from both said first band light and said second band light; the first liquid crystal panel further comprises a third pixel unit, and the third pixel unit is used for processing the third wave band light; the first super-structure lens is further used for guiding the light of the third wave band to enter a third pixel unit of the first liquid crystal panel;

8. The projection device of claim 7, wherein the first and fourth wavelength bands of light each comprise green light, the second and fifth wavelength bands of light each comprise red light, and the third and sixth wavelength bands of light each comprise blue light.

9. A projection apparatus according to claim 3, wherein said light source means comprises a first light source for emitting said first illumination light and a second light source for emitting said second illumination light, and said first super-structured lens is located between said first light source and said first liquid crystal panel, and said second super-structured lens is located between said second light source and said second liquid crystal panel; or,

10. The projection device of claim 2, wherein the first liquid crystal panel is positioned at a first location and the second liquid crystal panel is positioned at a second location such that pixels in the projected image formed by the first modulated light are offset from corresponding pixels in the projected image formed by the second modulated light by a predetermined distance.

11. A projection apparatus according to claim 3, wherein the first liquid crystal panel alternately displays color field images of first band light and second band light of an input signal, and the second liquid crystal panel alternately displays color field images of fourth band light and fifth band light of the input signal, respectively.

12. The projection device of claim 7, wherein the first liquid crystal panel alternately displays color field images of first, second, and third wavelength bands of light of the input signal, and the second liquid crystal panel alternately displays color field images of fourth, fifth, and sixth wavelength bands of light of the input signal, respectively.