WO2019233101A1 - Projection device - Google Patents

Projection device Download PDF

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Publication number
WO2019233101A1
WO2019233101A1 PCT/CN2019/070535 CN2019070535W WO2019233101A1 WO 2019233101 A1 WO2019233101 A1 WO 2019233101A1 CN 2019070535 W CN2019070535 W CN 2019070535W WO 2019233101 A1 WO2019233101 A1 WO 2019233101A1
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WO
WIPO (PCT)
Prior art keywords
light
light source
laser
projection
wavelength conversion
Prior art date
Application number
PCT/CN2019/070535
Other languages
French (fr)
Chinese (zh)
Inventor
胡飞
徐梦梦
余新
Original Assignee
深圳光峰科技股份有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Priority to CN201810590067.3 priority Critical
Priority to CN201810590067.3A priority patent/CN110581984A/en
Application filed by 深圳光峰科技股份有限公司 filed Critical 深圳光峰科技股份有限公司
Publication of WO2019233101A1 publication Critical patent/WO2019233101A1/en

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    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • H04N9/315Modulator illumination systems
    • HELECTRICITY
    • H04ELECTRIC COMMUNICATION TECHNIQUE
    • H04NPICTORIAL COMMUNICATION, e.g. TELEVISION
    • H04N9/00Details of colour television systems
    • H04N9/12Picture reproducers
    • H04N9/31Projection devices for colour picture display, e.g. using electronic spatial light modulators [ESLM]
    • H04N9/3141Constructional details thereof
    • H04N9/315Modulator illumination systems
    • H04N9/3161Modulator illumination systems using laser light sources

Abstract

Provided in the present invention is a projection device, comprising: a light source used for emitting an illuminating light; comprising a deformable mirror of a reflective surface; a spatial light modulator used for emitting projection light; a control apparatus respectively connected to the deformable mirror and the spatial light modulator, the control apparatus driving the contours of the reflective surface to deform on the basis of projection image data, such that the illuminating light emitted by the light source is reflected onto the spatial light modulator according to a specific light field distribution; the control apparatus also controls the spatial light modulator to modulate the incident light on the basis of the projection image data to obtain projection light. The control apparatus in the projection device of the present invention drives the contours of the reflective surface to deform in order to implement pre-modulation of the illuminating light, effectively increasing the rate of utilisation of the light on the basis of implementing HDR.

Description

Projection equipment Technical field

The present invention relates to the field of projection technology, and in particular, to a projection device.

Background technique

This section is intended to provide a background or context to the specific embodiments of the invention that are set forth in the claims. The description herein is not an admission that it is prior art by inclusion in this section.

The high dynamic range (HDR) projection system can increase the contrast and peak brightness of the projector output, so that the bright and dark fields in the picture can display rich grayscale information, which greatly improves the picture effect and the viewing experience of the audience. . Most of the HDR projection devices currently on the market use a two-chip spatial light modulator implementation scheme. A typical case, such as DolbyVision technology, achieves higher contrast by adding another spatial light modulator after the digital micromirror device (DMD). This solution enables the light field distribution to be controlled at the pixel level, but due to the addition of a second piece of spatial light modulator, the light utilization rate of the projector is greatly reduced.

Summary of the Invention

In order to solve the technical problem that the light utilization ratio caused by using the dual-chip spatial light modulator to achieve high dynamic range is greatly reduced in the prior art, the present invention provides a projection device capable of effectively improving light utilization ratio and realizing high dynamic range.

A projection device including

A light source for emitting illumination light;

Anamorphic mirror including reflecting surface;

Spatial light modulator; and

A control device that is electrically connected to the anamorphic mirror and the spatial light modulator, respectively, and the control device drives the outline of the reflecting surface to be deformed according to the projected image data, thereby changing the illumination light emitted by the light source to The light field distribution is reflected to the spatial light modulator; the control device further controls the spatial light modulator to further modulate incident light according to the projected image data.

Further, the light source includes a laser, and the illumination light includes a laser.

Further, a wavelength conversion device is further provided between the anamorphic mirror and the spatial light modulator, and the illumination light emitted from the reflecting surface excites the wavelength conversion device to generate fluorescence incident on the spatial light modulator.

Further, the light source further includes a wavelength conversion device, and the laser excites the wavelength conversion device to generate fluorescence incident on the anamorphic mirror.

Further, the light source includes a main light source and a supplementary light source. The main light source includes a wavelength conversion device for emitting fluorescence. The supplementary light source includes a laser and emits at least one color of supplementary light. The photosynthetic light emitted by the supplementary light source is incident on the anamorphic mirror.

Further, the light source further includes a reflector for reflecting light emitted from the main light source. The surface of the mirror is provided with a through hole, and the supplementary light passes through the through hole and the light emitted from the main light source is performed Together.

Further, the supplementary light source includes:

A red laser for emitting a red laser;

A green laser for emitting a green laser; and

A dichroic film for guiding the red laser light and the green laser light to exit through the same hole along the same optical path.

Further, after the laser light passes through the wavelength conversion device, it generates fluorescence including at least one color.

Further, after the laser light passes through the wavelength conversion device, yellow fluorescence and blue laser light are generated.

Further, the light source includes a light homogenizing device for homogenizing the laser light.

The control device in the projection device of the present invention drives the contour of the reflective surface to deform to achieve pre-modulation of the illumination light, and effectively improves the light utilization rate based on the realization of HDR.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to explain the technical solutions of the embodiments / modes of the present invention more clearly, the drawings used in the description of the embodiments / modes will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present invention. For a person of ordinary skill in the art, without drawing creative labor, other drawings can be obtained based on these drawings.

FIG. 1 is a schematic structural diagram of a projection device according to a first embodiment of the present invention.

FIG. 2 is a schematic exploded view of the anamorphic mirror shown in FIG. 1.

FIG. 3 is a flowchart of a method of the anamorphic mirror controlled by a control device in an embodiment of the present invention.

FIG. 4 is a schematic diagram of the principle of pre-modulating the illumination light by the anamorphic mirror according to the embodiment of the present invention.

FIG. 5 is a schematic structural diagram of a projection device according to a second embodiment of the present invention.

FIG. 6 is a schematic structural diagram of a projection device according to a third embodiment of the present invention.

FIG. 7 is a schematic structural diagram of a projection device according to a fourth embodiment of the present invention.

Explanation of main component symbols

Projection equipment 100, 200, 300, 400 light source 110, 210, 410 Main light source 412 Supplementary light source 414 illuminator 111, 112, 113, 211, 411a, 411b, 411c Reflector 415 Anamorphic mirror 130, 230 Mirror Department 131 Reflective surface 131a edge a, b Support base 132 Piezoelectric element 134, 134a, 134b

Fixed part 135 Electrode hole 136 Wavelength conversion device 240, 413 Spatial light modulator 150, 250 Lens 170, 270

The following specific embodiments will further explain the present invention in combination with the above drawings.

Detailed ways

In order to more clearly understand the foregoing objects, features, and advantages of the present invention, the present invention is described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, in the case of no conflict, the embodiments of the present application and the features in the embodiments can be combined with each other.

In the following description, many specific details are set forth in order to fully understand the present invention. The described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by a person of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

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 invention belongs. The terminology used herein in the description of the present invention is only for the purpose of describing specific embodiments, and is not intended to limit the present invention.

Please refer to FIG. 1, which is a schematic structural diagram of a projection device 100 according to a first embodiment of the present invention. The projection device 100 provided in the embodiment of the present invention can achieve high dynamic range (HDR), that is, the contrast and peak brightness of the projector output are high.

The projection device 100 includes a light source 110, an anamorphic mirror 130, a spatial light modulator 150, and a control device (not shown). Among them, the light source 110 is used for emitting illumination light, the spatial light modulator 150 is used for emitting projection light for projection, the deformed mirror 130 includes a reflecting surface 131a (as shown in FIG. 2), the control device and the deformed mirror 130 and spatial light modulation The controllers 150 are respectively electrically connected, and the control device drives the contour of the reflecting surface 131a to deform according to the projected image data, thereby reflecting the illumination light emitted by the light source 110 to the spatial light modulator 150 with a specific light field distribution; the control device The spatial light modulator 150 is further controlled according to the projected image data to modulate incident light to obtain the projected light.

The control device drives the contour of the reflecting surface 131a to be deformed to achieve pre-modulation of the illumination light. Compared with a projection device that implements HDR using a dual spatial light modulator, the projection device 100 in the present invention uses an anamorphic mirror 130 to replace one of the spatial light modulators in dual spatial light modulation, and effectively improves light utilization on the basis of implementing HDR .

Specifically, in this embodiment, the light source 110 emits white laser light and maintains white balance. The light source 110 includes light emitters 111, 112, and 113. The light emitter 111 includes a blue laser and emits blue laser light, the light emitter 112 includes a red laser and emits red laser light, and the light emitter 113 includes a green laser and emits green laser light. It can be understood that a laser array can be set in the illuminants 111, 112, and 113, and the specific number of lasers can be selected according to actual needs.

The light source 110 further includes a light combining component 114 for combining the laser beams of various colors, and a light uniforming device 117 for uniform light distribution. In this embodiment, the light combining component 114 includes dichroic sheets 114a and 114b arranged at intervals. The dichroic sheet 114a is provided with an anti-red and blue film, and is used to connect the light emitter 111 and the light emitter. The blue laser light emitted by 112 combines with the red laser light and emits a magenta laser light; the dichroic film 114b is provided with an anti-green, red and blue film, and is used to combine the dichroic film 114a and the magenta emitted from the light emitter 113 The laser is combined with the green laser and emits a white laser. It can be understood that, in one embodiment, the light combining component 114 includes a dichroic film that transmits blue, red and green, and it can be understood that the three primary color lasers can also be combined in other ways. This is the limit. The light homogenizing device 117 may be a light homogeneous shaping element such as a compound eye or a light rod. The light homogenizing device 117 guides the light from the light source 110 after the white light emitted from the light combining component 114 is homogenized. In one embodiment, a scattering film is provided in the light homogenizing device 117 to perform decoherence processing on the white laser light. It can be understood that the light source 110 may further include other guiding devices known in the art, such as a relay lens and a reflector.

Please refer to FIG. 2, which is a schematic exploded view of the anamorphic mirror 130 shown in FIG. 1. The anamorphic mirror 130 includes a mirror portion 131, a support base portion 132, a piezoelectric element 134, a fixing portion 135, and an electrode hole 136 (136 is not indicated on the hole). The deformed mirror 130 changes the shape of the outline of the reflecting surface 131 a formed on the top side of the mirror portion 131 by using the vertical displacement of the piezoelectric element 134. A plurality of piezoelectric elements 134 and a plurality of fixing portions 135 are mounted on the support base portion 132. In this embodiment, the number of the piezoelectric elements 134 is four, and the number of the fixing portions 135 is four.

Among them, the support base 132 is formed of, for example, an insulating material such as ceramic or glass. A plurality of electrode holes 136 are formed in the support base 132, and a voltage is supplied to the piezoelectric element 134 through the electrode holes 136. The shape of the reflecting surface 131a of the mirror portion 131 is changed by the piezoelectric element 134, and the mirror portion 131 reflects the illumination light incident from the light source 110 (FIG. 1).

The mirror portion 131 is preferably formed of a rigid and conductive material so that it can be electrically connected to the piezoelectric element 134. Examples of such materials include silicon and metals such as aluminum and iron. The mirror portion 131 may also be formed of an insulating material such as glass, although the mirror portion 131 does not have conductivity. In the case where the mirror portion 131 is formed of an insulating material such as glass, in order to achieve electrical conduction with the piezoelectric element 134, it is necessary to form an electrode by a method such as vapor-deposited gold on the side of the mirror portion 131 opposite to the reflective surface 131a. Pattern, or an electrode is mounted on the opposite side of the reflecting surface 131a of the mirror portion 131. The mirror portion 131 may be formed of a single material. Alternatively, the base portion of the mirror portion 131 may also be formed of silicon, and then the top side of the base portion may be covered by laying an aluminum coating or the like to form a reflective surface 131a. It is also possible to form multiple layers on its bottom.

In this embodiment, the mirror portion 131 has a flat plate shape. Alternatively, the mirror portion 131 may be formed into any other shape or made other changes according to the purpose of the present invention. For example, the reflecting surface 131a portion of the mirror portion 131 may be concave, so that the mirror portion 131 may be formed into a concave shape as a whole.

The plurality of fixing portions 135 are sandwiched between the support base portion 132 and the mirror portion 131 and are provided on the periphery of the plurality of piezoelectric elements 134 in a plan view. The top surface of the fixing portion 135 is coupled to the mirror portion 131. In this embodiment, the fixing portion 135 is separated from the supporting base portion 132. Alternatively, the supporting base portion 132 and the fixing portion 135 may be integrally formed, or formed into any other shape or made other changes according to the purpose of the present invention. Preferably, the heights of the respective fixing portions 135 are equal to prevent the reflection surface 131 a of the mirror portion 131 from being distorted. Preferably, the relationship between the height of the fixing portion 135 and the piezoelectric element 134 is adjusted so that the reflection surface 131a is not distorted.

The piezoelectric element 134 is sandwiched between the support base portion 132 and the mirror portion 131. The piezoelectric element 134 is connected to a separate electrode (not shown) through an electrode hole 136 formed on a side facing the bottom surface of the piezoelectric element 134. The top surface of the piezoelectric element 134 is in contact with the mirror portion 131, which allows the piezoelectric element 134 to expand and contract. In the case where the mirror portion 131 is formed of an insulating material as described above, an electrode layer is vapor-deposited on the opposite side of the reflecting surface 131a of the mirror portion 131 to provide an electrode on the mirror portion 131, and this electrode is used as Common electrode.

The piezoelectric element 134 is formed of a piezoelectric ceramic such as PZT (lead zirconate titanate, Pb (ZrXTi1-X) O3) or a piezoelectric polymer such as polyvinylidene fluoride. Among them, piezoelectric ceramics are preferred because of their high mechanical strength.

In this embodiment, the piezoelectric element 134 has a rectangular columnar shape, and is tapered at the tip of the piezoelectric element 134 that is in contact with the mirror portion 131. However, the piezoelectric element 134 may be formed in any shape. For example, the top end of the piezoelectric element 134 may be rectangular parallelepiped or cylindrical.

As shown in FIG. 2, in the present embodiment, a plurality of piezoelectric elements 134 are preferably arranged symmetrically. However, in order to uniformly change the shape of the reflection surface 131a of the mirror portion 131 at each position, it is more preferable that four piezoelectric elements 134 are symmetrically provided in a cross-shaped direction in a plan view. The plurality of fixing portions 135 are provided adjacent to each of the piezoelectric elements 134 along the lines of the plurality of piezoelectric elements 134 provided symmetrically. In order to change the shape of the reflecting surface 131 a more accurately, it is preferable that the piezoelectric element 134 be symmetrically disposed with respect to an axis passing through the center of the reflecting surface 131 a of the mirror portion 131. In addition, the piezoelectric element 134 may be provided in accordance with the relationship with the illuminating light incident on the anamorphic mirror 130.

It can be understood that the deformed mirror 130 may also use other mechanical structures or connection methods to drive the reflective surface 131a to be deformed, and is not limited thereto.

Please refer to FIG. 3, which is a flowchart of a method of an anamorphic mirror 130 controlled by a control device according to an embodiment of the present invention. It includes the following steps:

S1: Obtain projected image data.

S2: Extract image information from the projected image data and convert it into a corresponding electrical signal.

In an embodiment of the present invention, the control device includes an image processing system and a driving circuit, and the image processing system extracts image information from the projection image data and converts the image information into a corresponding electrical signal. It can be understood that the control device controls the anamorphic mirror 130 to pre-modulate the illumination light according to the projected image data, and controls the spatial light modulator 150 to further modulate the pre-modulated illumination light, so as to obtain a conforming projection. Projected light of image data. It can be understood that, for each frame of projected image data, different image information can be extracted according to different image algorithms, and converted into corresponding electrical signals for driving the deformed mirror 130 to undergo deformation. The electrical signals and the control The device is used to control the control signals of the spatial light modulator 150 to ensure that the illumination light is sequentially pre-modulated by the anamorphic mirror 130 and that the projection light obtained by the modulation of the spatial light modulator 150 conforms to the projection image data.

S3: The piezoelectric element 134 of the deformed mirror 130 is driven to deform by using the electrical signal.

The driving circuit drives the piezoelectric element 134 of the deformed mirror 130 to deform according to the electrical signal.

S4: The piezoelectric element 134 drives the reflective surface 131a to deform. The reflective surface 131a pre-modulates the incident illumination light, so that the illumination light emitted from the reflective surface 131a has a specific light field distribution corresponding to the projected image data. It can be understood that, for each frame of projected image data, a variety of different image information and corresponding electrical signals can be obtained according to different image algorithms. Different electrical signals correspond to different light field distributions of the illumination light emitted from the reflecting surface 131a. Each frame of projected image data can obtain illumination light with different specific light field distribution.

Please refer to FIG. 4 in conjunction with FIG. 3, which is a schematic diagram of the principle of pre-modulation of the illumination light by the anamorphic mirror 130. The anamorphic mirror 130 (FIG. 3) includes a piezoelectric element 134a and a piezoelectric element 134b, and the reflecting surface 131a includes an edge a and an edge b. In FIG. 4, the principle of the pre-modulation of the light source 110 (FIG. 1) by the anamorphic mirror 130 will be described with the one-dimensional line having the two piezoelectric elements 134 a and the piezoelectric element 134 b as fulcrum points as the reflecting surface 131 a.

Among them, the figure (A) corresponds to the case where the piezoelectric element 134a and the piezoelectric element 134b are not deformed. When a uniformly distributed parallel light is incident, it is reflected by the undeformed reflecting surface 131a, and the outgoing light is still parallel light. Evenly distributed light spots; Figure (B) shows the driving circuit acting on the piezoelectric element 134a and the piezoelectric element 134b, so that the reflecting surface 131a is deformed into an elliptical arc. At this time, after the parallel light is incident, it is reflected. The surface 131a reflects, so that the light intensity at O1 is the strongest; Figure (C) shows that the driving circuit acts on the piezoelectric element 134a and the piezoelectric element 134b, so that the reflecting surface 131a is deformed into a geometric parameter different from that in Figure (B) Of an elliptical arc. At this time, after the parallel light is incident, it is reflected by the reflecting surface 131a, so that the light intensity at O2 is the strongest. The above analysis shows that the deformed mirror 130 including the piezoelectric element 134a and the piezoelectric element 134b in FIG. 4 can make the strongest light spot at different positions in the case of an elliptical arc surface, achieve different light distribution, and increase other deformations. For example, if the deformed mirror 130 is a circular arc, a parabola, a hyperboloid or other curved shapes, more light distribution can be achieved; the number of piezoelectric elements 134 is increased, and the one-dimensional curve is extended to a two-dimensional curved surface. The reflective surface presents more curved shapes, which can further achieve more light distribution. The anamorphic mirror 130 adjusts the light energy in the light path according to the brightness parameters of different regions in the image information, and the light is emitted in a preset light field distribution. Therefore, the use of the pre-modulation of the anamorphic mirror 130 to achieve HDR is beneficial to improve the light utilization rate.

Please refer to FIG. 1 again. In this embodiment, the light emitted by the anamorphic mirror 130 passes through the relay lens group and the TIR prism and enters the spatial light modulator 150 in this order. The spatial light modulator 150 in the embodiment of the present invention may be an LCD (Liquid Crystal Display), an LCOS (Liquid Crystal on Silicon), a DMD (Digital Mirror Device, Digital Micromirror Device) , Digital micromirror element) and so on. The relay lens group includes a plurality of lenses with coincident optical axes. In other embodiments, the relay system may also use other forms of relay lenses.

The TIR prism is composed of a plurality of shaped prism bodies, and an air gap is provided between the plurality of prism bodies. The TIR prism further includes a first light emitting surface, a second light emitting surface, and at least one light incident surface connected between the first light emitting surface and the second light emitting surface. The first light emitting surface is directly opposite to the spatial light modulator 150, the second light emitting surface is directly opposite to the lens 170 of the projection device 100, the light incident surface is corresponding to the relay lens group, and the relay The light emitted from the lens group reaches the light incident surface, and the TIR prism guides the light incident from the light incident surface to exit from the first light emitting surface to the spatial light modulator 150, and the light emitted from the spatial light modulator 150 is from The first light emitting surface is incident into the TIR prism, and passes through the second light emitting surface and is incident on the lens 170.

It can be understood that the projection device 100 further includes other optical devices known in the art, such as a relay lens, a diffuser, a light homogenizing device, and other guiding devices, such as a mirror, a dichroic film, and the like.

Please refer to FIG. 5, which is a schematic structural diagram of a projection device 200 according to a second embodiment of the present invention. The main difference between the projection device 200 and the projection device 100 is that the projection device 200 further includes a wavelength conversion device 240, and an anamorphic mirror 230 is provided between the light source 210 and the wavelength conversion device 240. The illumination light emitted from the light source 210 excites the wavelength conversion device 240 to generate at least one color of fluorescence after being pre-modulated by the anamorphic mirror 230. The light emitted by the wavelength conversion device 240 is further modulated by the spatial light modulator 250 and is emitted from the lens 270. It should be noted that within the scope of the spirit or basic features of the present invention, the specific solutions applicable to the foregoing embodiments can also be correspondingly applied to this embodiment. In order to save space and avoid repetition, it is not described here. More details.

Specifically, the light source 210 includes a light emitting body 211 to emit a monochromatic illumination light for exciting the wavelength conversion device 240. In one embodiment, the light emitting body 211 includes a blue laser for emitting a blue laser light as the illumination light. In other embodiments, the light emitting body 211 emits lasers of other colors, such as ultraviolet lasers and the like. Specifically, the number of lasers included in the light emitting body 211 may be selected according to actual needs, and the light emitting body 211 may further include a laser array.

In this embodiment, the wavelength conversion device 240 includes a disk-shaped substrate and a driving unit provided at the bottom of the substrate. The driving unit drives the substrate to rotate periodically. A conversion area and a scattering area are provided on one surface of the substrate, and the conversion area is provided with phosphors of at least one color to convert the illumination light emitted by the anamorphic mirror 230 into fluorescence of a corresponding color. The scattering area is provided with a scattering material to de-coherently emit the illumination light. The conversion region and the scattering region are located on the optical path of the illumination light with a distance from the driving unit. It can be understood that, in one embodiment, the illumination light is a blue laser, and the conversion region may be provided with a yellow phosphor, or a red phosphor + a green phosphor, or a yellow phosphor + a green phosphor, or a yellow phosphor. A combination of pink + red phosphor and other wavelength conversion materials to synthesize white light with the illumination light.

It can be understood that, in one embodiment, the wavelength conversion device 240 includes a strip-shaped substrate, and a driving unit is disposed on one end surface of the substrate, and the driving unit drives the substrate to perform a periodic reciprocating motion. The conversion region and the scattering region on the substrate are located on the optical path of the illumination light at intervals by the driving unit.

Please refer to FIG. 6, which is a schematic structural diagram of a projection device 300 according to a third embodiment of the present invention. The main difference between the projection device 300 and the projection device 200 is that the anamorphic mirror 330 in the projection device 300 is disposed between the wavelength conversion device 340 and the spatial light modulator 350. The light emitted by the wavelength conversion device 340 passes through the anamorphic mirror 330 in order. Pre-modulation, and further modulation by the spatial light modulator 350 results in projection light for projection. It should be noted that within the scope of the spirit or basic features of the present invention, the specific solutions applicable to the foregoing embodiments can also be correspondingly applied to this embodiment. In order to save space and avoid repetition, it is not described here. More details.

Please refer to FIG. 7, which is a schematic structural diagram of a projection apparatus 400 according to a fourth embodiment of the present invention. The main difference between the projection device 400 and the projection device 300 is that the light source 410 includes a main light source 412 and a supplementary light source 414. The main light source 412 includes a wavelength conversion device 413 and a light emitting body 411a for emitting fluorescence. The supplementary light source 414 includes light emission. The body 411b and the light-emitting body 411c emit complementary light of two colors. The light-emitting body 411b and the light-emitting body 411c are both lasers and emit laser light of different colors. The combined light from the main light source 412 and the supplementary light source 414 is incident on the deformed mirror 430.

It should be noted that within the scope of the spirit or basic features of the present invention, the specific solutions applicable to the first embodiment can also be correspondingly applied to the second embodiment. To save space and avoid repetition, here Will not repeat them.

In this embodiment, the light-emitting body 411a is a laser, preferably a blue laser. The red phosphor, the green phosphor, and the scattering material provided by the wavelength conversion device 413 are alternately located on the light path of the light emitted from the light emitting body 411a. The blue laser light emitted by the light emitting body 411a passes through the wavelength conversion device 413 to alternately generate red fluorescence, green fluorescence Scattered blue laser. It can be understood that the light emitting body 411a may also select lasers of other colors. Accordingly, the surface of the wavelength conversion device 413 may also be provided with a yellow phosphor, or a yellow phosphor + a green phosphor, or a yellow phosphor + a red phosphor, etc. A combination of wavelength conversion materials.

In this embodiment, the light emitting body 411b is a red laser and emits red supplementary light, and the light emitting body 411c includes a green laser and emits green supplementary light. The red supplementary light and the green supplementary light pass through the dichroic film and are emitted along the same optical path. In other embodiments, the supplementary light source 414 includes only a light emitting body 411b that emits supplementary light of one color, such as a red laser, and the supplementary light source 414 emits red laser light as supplementary light.

The light rays emitted from the main light source 412 and the supplementary light source 414 are combined according to the optical expansion amount. Specifically, the light source 410 includes a reflector 415 for reflecting light emitted from the main light source 412, and a surface of the reflector 415 is provided with a through hole. The light emitted by the wavelength conversion device 413 includes fluorescence and scattered laser light, which has a large light expansion amount, a large spot area formed on the reflector 415, and most of the light emitted from the main light source 412 is reflected by the reflector 415. The supplementary light is a laser, and the amount of light expansion is small. A small light spot can be formed on the reflector 415. The through hole is set corresponding to the spot position of the supplementary light, and the supplementary light passes through the through hole. Combines light with the light emitted from the wavelength conversion device 413.

It can be understood that the light source 410 further includes a light homogenizing device for homogenizing the laser light, and the light homogenizing device may be a compound eye or a light rod.

It will be apparent to those skilled in the art that the present invention is not limited to the details of the above-mentioned exemplary embodiments, and that the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the embodiments are to be regarded as exemplary and non-limiting in every respect, and the scope of the present invention is defined by the appended claims rather than the above description, and therefore is intended to fall within the claims. All changes that come within the meaning and range of equivalents are encompassed by the invention. Any reference signs in the claims should not be construed as limiting the claims involved. In addition, it is obvious that the word "comprising" does not exclude other units or steps, and that the singular does not exclude the plural. Multiple devices stated in a device claim may also be implemented by the same device or system through software or hardware. Words such as first and second are used to indicate names, but not in any particular order.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present invention and are not limiting. Although the present invention is described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solution of the present invention can be Modifications or equivalent substitutions can be made without departing from the spirit and scope of the technical solution of the present invention.

Claims (10)

  1. A projection device, comprising
    A light source for emitting illumination light;
    Anamorphic mirror including reflecting surface;
    Spatial light modulator; and
    And a control device electrically connected to the anamorphic mirror and the spatial light modulator, respectively, and the control device drives the contour of the reflecting surface to be deformed according to the projected image data, thereby changing the illumination light emitted by the light source to a specific The light field distribution is reflected to the spatial light modulator; the control device further controls the spatial light modulator to further modulate incident light according to the projected image data.
  2. The projection apparatus according to claim 1, wherein the light source includes a laser, and the illumination light includes a laser.
  3. The projection device according to claim 2, wherein a wavelength conversion device is further provided between the anamorphic mirror and the spatial light modulator, and the illumination light emitted from the reflecting surface excites the wavelength conversion device to generate an incident light. To the fluorescence of the spatial light modulator.
  4. The projection apparatus according to claim 2, wherein the light source further comprises a wavelength conversion device, and the laser excites the wavelength conversion device to generate fluorescence incident on the anamorphic mirror.
  5. The projection device according to claim 2, wherein the light source includes a main light source and a supplementary light source, the main light source includes a wavelength conversion device for emitting fluorescence, and the supplementary light source includes a laser and emits at least one Supplementary light of various colors, and the light emitted from the main light source and the supplemental light source are combined and incident on the anamorphic mirror.
  6. The projection device according to claim 5, wherein the light source further comprises a reflector for reflecting light emitted from the main light source, a surface of the reflector is provided with a through hole, and the supplementary light passes through the reflector. The through hole combines light emitted from the main light source.
  7. The projection device according to claim 6, wherein the supplementary light source comprises:
    A red laser for emitting a red laser;
    A green laser for emitting a green laser; and
    A dichroic film for guiding the red laser light and the green laser light to exit through the same hole along the same optical path.
  8. The projection device according to any one of claims 3-7, wherein the laser light generates fluorescence including at least one color after passing through the wavelength conversion device.
  9. The projection device according to claim 8, wherein the laser light generates yellow fluorescence and blue laser light after passing through the wavelength conversion device.
  10. The projection device according to claim 2, wherein the light source includes a light homogenizing device for homogenizing the laser light.
PCT/CN2019/070535 2018-06-08 2019-01-05 Projection device WO2019233101A1 (en)

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CN201810590067.3A CN110581984A (en) 2018-06-08 2018-06-08 Projection device

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104516212A (en) * 2013-09-30 2015-04-15 佳能株式会社 Optical apparatus, projection optical system, exposure apparatus, and method of manufacturing article
US20160161737A1 (en) * 2014-12-04 2016-06-09 Canon Kabushiki Kaisha Deformable mirror, optical system including the deformable mirror, and ophthalmologic apparatus
CN107209445A (en) * 2015-03-20 2017-09-26 精工爱普生株式会社 Projecting apparatus
CN107203037A (en) * 2016-03-17 2017-09-26 株式会社理光 Control device, light deflection system, image projection device and control method

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104516212A (en) * 2013-09-30 2015-04-15 佳能株式会社 Optical apparatus, projection optical system, exposure apparatus, and method of manufacturing article
US20160161737A1 (en) * 2014-12-04 2016-06-09 Canon Kabushiki Kaisha Deformable mirror, optical system including the deformable mirror, and ophthalmologic apparatus
CN107209445A (en) * 2015-03-20 2017-09-26 精工爱普生株式会社 Projecting apparatus
CN107203037A (en) * 2016-03-17 2017-09-26 株式会社理光 Control device, light deflection system, image projection device and control method

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