Optical device, projection system and interaction method

Abstract

An optical device, a projection system and an interaction method relate to the technical field of projection. The optical device comprises a light source, a dissipation mechanism located on the light-emitting side of the light source and a lens assembly located on the light-emitting side of the dissipation mechanism. The light source is used for emitting a light beam, the dissipation mechanism is used for inclining at a first position and a second position along a first axis, so that the light beam emits frame images through the lens assembly, and different frame images are projected at different positions of a projection picture for superposition display; pixels between adjacent frames of images are offset. The optical device can reduce the speckle contrast through the displacement and superposition of the pixel array, thereby improving the speckle elimination effect.

Description

Technical Field

[0001] The present invention relates to the field of projection technology, and more particularly, to an optical device, a projection system and an interaction method. Background Art

[0002] Since laser display technology uses lasers as light sources, it has a wider color reproduction ability to achieve a larger color gamut, and due to the high collimation and high electro-optical conversion efficiency of lasers, laser display technology is more competitive. However, since the lasers used in this display technology are coherent light sources, the coherent light beams form speckles after being diffusely reflected by a rough surface. Speckles are the key factors affecting the imaging quality of laser displays. Therefore, in laser display technology, how to reduce the visual interference of laser speckles is a current research hotspot.

[0003] Currently, there are mainly three research solutions for reducing laser speckles: the first is to weaken the temporal coherence of the laser light source, such as broadening the spectral width of the light source; the second is to weaken the spatial coherence of the laser light source. After the spatially separated light sources form two non-coherent speckles, due to the superposition of the speckle intensities, the speckle contrast is reduced; the third is to introduce dynamic components in the optical path, and use the dynamic components to generate multiple uncorrelated speckle images, and weaken the speckle contrast through the superposition of the images. However, most of the existing methods for eliminating speckles have problems such as complex structures, large volumes, and not very obvious effects. Therefore, how to provide a new way to eliminate speckles is a technical problem that needs to be solved urgently at present. Summary of the Invention

[0004] The purpose of the present invention is to provide an optical device, a projection system and an interaction method, which can reduce the speckle contrast through the displacement and superposition of pixel arrays, and thus improve the effect of eliminating speckles.

[0005] The embodiments of the present invention are implemented as follows:

[0006] On the one hand, the present invention provides an optical device, which includes a light source, a dissipation mechanism located on the light-emitting side of the light source, and a lens assembly located on the light-emitting side of the dissipation mechanism; the light source is used to emit a light beam, and the dissipation mechanism is used to tilt along a first axis between a first position and a second position, so that the light beam passes through the lens assembly to emit a frame image, and different frame images are projected and superimposed at different positions on the projection screen; there is an offset between the pixels of adjacent frame images. This optical device can reduce the speckle contrast through the displacement and superposition of pixel arrays, and thus improve the effect of eliminating speckles.

[0007] Optionally, the dissipation mechanism includes a spatial light modulation chip and a speckle displacement unit; the speckle displacement unit is located between the light-emitting side of the spatial light modulation chip and the light-incident side of the lens assembly; the spatial light modulation chip is used for modulating the light beam, and the speckle displacement unit is used for deflecting the light beam emitted from the spatial light modulation chip.

[0008] Optionally, the speckle displacement unit includes a refraction element and a driving element. The refraction element is arranged on the light-emitting side of the spatial light modulation chip, and the driving element is used for driving the refraction element to tilt along a first axis between a first position and a second position. The pixel displacement value between adjacent frame images and the refraction element satisfy the following formula:

[0009] (a 2 b 2 +q 2 -m 2 q 2 )sin 2 θ - 2absin 3 θ + 2abqm 2 sinθ = a 2 b 2 m 2

[0010] where θ is the deflection angle of the refraction element, m is the refractive index of the refraction element, q is the thickness of the refraction element, b is the diameter of the speckle particles generated by the optical device, and a is a constant.

[0011] Optionally, the dissipation mechanism includes a spatial light modulation chip and an electrostatic drive unit insulatedly connected to the spatial light modulation chip. The electrostatic drive unit is used for driving the spatial light modulation chip to tilt along a first axis between a first position and a second position; the pixel displacement value between adjacent frame images and the spatial light modulation chip satisfy the following formula:

[0012]

[0013] where a is a constant, b is the diameter of the speckle particles generated by the optical device, d is the distance between the spatial light modulation chip and the lens assembly, and β is the deflection angle of the modulated light emitted from the spatial light modulation chip.

[0014] Optionally, the driving element includes:

[0015] a first bracket having a mounting portion and a connecting portion, and the mounting portion mounts the refraction element;

[0016] a base body, and the first bracket is connected to the base body through the connecting portion;

[0017] a first electromagnetic member disposed on the base body;

[0018] a second electromagnetic member disposed on the first bracket and corresponding to the first electromagnetic member in position;

[0019] Under the interaction between the first electromagnetic member and the second electromagnetic member, the first bracket can move relative to the base through the connecting portion.

[0020] Optionally, the electrostatic driving unit includes a driving substrate insulated and connected to the spatial light modulation chip, a driving circuit board located on the side of the driving substrate away from the spatial light modulation chip, and an elastic connecting member connecting the driving substrate and the driving circuit board; the driving circuit board is provided with a plurality of electrodes electrically connected to the driving circuit board respectively, and the plurality of electrodes and the driving substrate are electrically connected to an external power supply respectively.

[0021] Optionally, the optical device further comprises an illumination component disposed on the light emitting side of the light source and the light incident side of the dissipation mechanism, and the illumination component is used to homogenize and shape the light beam emitted by the light source.

[0022] Another aspect of the present invention provides a projection system, which includes the above-mentioned optical device.

[0023] Another aspect of the present invention provides an interaction method, which includes the above-mentioned optical device, and the interaction method includes the following steps: the optical device displays a first interface; the user sends a control signal through a wireless device, a voice device or a gesture; the optical device responds to the control signal to display a second interface, and the second interface includes a selection interface; the user selects an option on the selection interface to control the dissipation mechanism, and the option includes a first mode and / or a second mode. The dissipation mechanism works in the first mode, and does not work in the second mode.

[0024] The beneficial effects of the present invention include:

[0025] The optical device provided by the present application includes a light source, a dissipation mechanism located on the light-emitting side of the light source, and a lens assembly located on the light-emitting side of the dissipation mechanism; the light source is used to emit a light beam, and the dissipation mechanism is used to tilt at a first position and a second position along a first axis, so that the light beam passes through the lens assembly to emit a frame image, and different frame images are projected at different positions of the projection screen for superposition display; there is an offset between the pixels of adjacent frame images. The present application sets a dissipation mechanism, and enables the dissipation mechanism to tilt between the first position and the second position along the first axis. In this way, the dissipation mechanism can play an angular deflection role on the light beam, so that after the light beam passes through the dissipation mechanism and is incident on the lens assembly, it can form a frame image at different positions of the projection screen, and there is a position offset between the pixels of adjacent frame images. In this way, the optical device is used to emit multiple frames of images, and the multiple frames of images can be superimposed and displayed at different positions of the projection screen, so that the speckle contrast can be reduced, thereby improving the effect of eliminating speckle. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] To more clearly illustrate the technical solutions of the embodiments of the present invention, the following will briefly introduce the drawings required for use in the embodiments. It should be understood that the following drawings only show some embodiments of the present invention and should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0027] Figure 1 Schematic structural diagram of the optical device provided by the embodiment of the present invention;

[0028] Figure 2 Schematic diagram of the first frame image obtained by the embodiment of the present invention;

[0029] Figure 3 Schematic diagram of the second frame image obtained by the embodiment of the present invention;

[0030] Figure 4 Schematic diagram of the third frame image obtained by the embodiment of the present invention;

[0031] Figure 5 Schematic diagram of the fourth frame image obtained by the embodiment of the present invention;

[0032] Figure 6 One of the schematic structural diagrams of the speckle displacement unit provided by the embodiment of the present invention;

[0033] Figure 7 Another schematic structural diagram of the speckle displacement unit provided by the embodiment of the present invention;

[0034] Figure 8 The third schematic structural diagram of the speckle displacement unit provided by the embodiment of the present invention;

[0035] Figure 9 Schematic structural diagram of the electrostatic drive unit provided by the embodiment of the present invention;

[0036] Figure 10 Schematic flowchart of the interaction method provided by the embodiment of the present invention.

[0037] Icons: 10 - light source; 20 - dissipation mechanism; 21 - spatial light modulation chip; 22 - speckle displacement unit; 221 - refraction element; 222 - drive element; 2221 - first bracket; 2222 - base; 2223 - first electromagnetic part; 2224 - second electromagnetic part; 2225 - connecting part; 23 - electrostatic drive unit; 231 - drive substrate; 232 - drive circuit board; 233 - elastic connecting piece; 234 - electrode; 235 - insulating layer; 30 - lens assembly. Detailed implementation manners

[0038] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Apparently, the described embodiments are some, but not all, of the embodiments of the present invention. Components of the embodiments of the present invention generally described and illustrated in the drawings herein may be arranged and designed in a variety of different configurations.

[0039] Therefore, the detailed description of the embodiments of the present invention provided in the drawings below is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts fall within the scope of the present invention.

[0040] It should be noted that like reference numerals and letters denote like items in the following drawings. Therefore, once an item is defined in one drawing, it does not require further definition and explanation in subsequent drawings.

[0041] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings or the orientation or positional relationship in which the inventive product is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and should not be construed as indicating or implying relative importance.

[0042] In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but may be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but may be slightly inclined.

[0043] In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "installed", "connected", and "connected" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a mechanical connection or an electrical connection; it may be directly connected or indirectly connected through an intermediate medium, and it may be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0044] Please refer to Figure 1, this embodiment provides an optical device, which includes a light source 10, a dissipation mechanism 20 located on the light-emitting side of the light source 10, and a lens assembly 30 located on the light-emitting side of the dissipation mechanism 20; the light source 10 is used to emit a light beam, and the dissipation mechanism 20 is used to tilt along a first axis between a first position and a second position, so that the light beam passes through the lens assembly 30 to emit a frame image, and different frame images are projected onto different positions of the projection screen for superimposed display; there is a pixel offset between adjacent frame images. This optical device can reduce the speckle contrast through the displacement and superposition of the pixel array, thereby improving the effect of eliminating speckles.

[0045] Among them, the above light source 10 is used to emit a light beam. Specifically, in this embodiment, the light source 10 can sequentially emit light beams of multiple different colors.

[0046] The dissipation mechanism 20 is used to modulate the light beam emitted by the light source 10, and can tilt along the first axis between the first position and the second position, so that the light beam can be incident on the lens assembly 30 at different angles, and a frame image is emitted after passing through the lens assembly 30. It should be noted that the above first axis is the diagonal direction of the dissipation mechanism 20 or the midline direction of the opposite sides of the dissipation mechanism 20. As Figure 1 shown, the above first position and second position are respectively at the maximum positive deflection position and the maximum negative deflection position of the dissipation mechanism 20. For example, if the maximum positive deflection angle and the maximum negative deflection angle are both β, the dissipation mechanism 20 can tilt between +β and -β along the first axis, so that the light beam incident on the lens assembly 30 after passing through the dissipation mechanism 20 can achieve a change in the incident angle. In this way, different frame images can be formed after the light beam passes through the lens assembly 30, and the positions of different frame images in the projection screen are different.

[0047] As Figures 2 to 5 shown, Figures 2 to 5 are respectively four consecutive frame images. The light beam incident on the lens assembly 30 after passing through the dissipation mechanism 20 can respectively form four different frame images in the projection screen. Among them, there is a pixel offset between adjacent frame images (as Figures 2 to 3 , Figures 3 to 4 , Figures 4 to 5 , there is a pixel position offset between adjacent frame images). In this way, by adjusting the deflection angle of the light beam by the dissipation mechanism 20 in this application, the pixel offset between adjacent frame images can be achieved. In this way, when different frame images are projected onto the projection screen, due to the pixel offset (i.e., displacement) between adjacent frame images, different frame images can be superimposed and displayed. In this way, the speckle contrast can be reduced, and the effect of eliminating speckles can be improved.

[0048] The lens assembly 30 is disposed on the light-emitting side of the dissipation mechanism 20. In this way, the light beam passing through the dissipation mechanism 20 can be emitted through the lens assembly 30, so as to be projected and displayed in the projection screen.

[0049] In summary, the optical device provided by the present application includes a light source 10, a dissipation mechanism 20 located on the light-emitting side of the light source 10, and a lens assembly 30 located on the light-emitting side of the dissipation mechanism 20; the light source 10 is used to emit a light beam, and the dissipation mechanism 20 is used to tilt along a first axis between a first position and a second position, so that the light beam passes through the lens assembly 30 to emit a frame image, and different frame images are projected and superimposed at different positions on the projection screen; there is an offset between the pixels of adjacent frame images. By providing the dissipation mechanism 20 in the present application and enabling the dissipation mechanism 20 to tilt between the first position and the second position along the first axis, in this way, the dissipation mechanism 20 can deflect the angle of the light beam, so that after the light beam passes through the dissipation mechanism 20 and enters the lens assembly 30, frame images can be formed at different positions on the projection screen, and there is a position offset between the pixels of adjacent frame images. Thus, by using the optical device to emit multiple frame images, the multiple frame images can be superimposed and displayed at different positions on the projection screen. In this way, the speckle contrast can be reduced, and further the effect of eliminating speckles can be improved.

[0050] The present application does not limit the specific structure of the dissipation mechanism 20, and those skilled in the art can set it by themselves, as long as the dissipation mechanism 20 can tilt along the first axis between the first position and the second position, and can make the light beam pass through the lens assembly 30 to emit a frame image, and different frame images can be projected and superimposed at different positions on the projection screen, and there is a position offset between the pixels of adjacent frame images. Optionally, in a feasible implementation manner, the dissipation mechanism 20 includes a spatial light modulation chip 21 and a speckle displacement unit 22; the speckle displacement unit 22 is located between the light-emitting side of the spatial light modulation chip 21 and the light-incident side of the lens assembly 30; the spatial light modulation chip 21 is used to modulate the light beam, and the speckle displacement unit 22 is used to deflect the light beam emitted by the spatial light modulation chip 21.

[0051] That is, in this implementation manner, the dissipation mechanism 20 realizes the angular deflection of the light beam through the speckle displacement unit 22.

[0052] Please refer to Figures 6 to 8 , optionally, the speckle displacement unit 22 includes a refraction element 221 and a driving element 222. The refraction element 221 is disposed on the light-emitting side of the spatial light modulation chip 21, and the driving element 222 is used to drive the refraction element 221 to tilt along the first axis between the first position and the second position. The pixel displacement value between adjacent frame images and the refraction element 221 satisfy the following formula:

[0053] (a 2 b 2+q 2 -m 2 q 2 )sin 2 θ - 2absin 3 θ + 2abqm 2 sinθ = a 2 b 2 m 2

[0054] Wherein, θ is the deflection angle of the refraction element 221, m is the refractive index of the refraction element 221, q is the thickness of the refraction element 221, b is the diameter of the speckle particles generated by the optical device, and a is a constant.

[0055] Wherein, the above-mentioned refraction element 221 can be a glass sheet, and the driving element 222 can be realized by driving with a coil and a magnet.

[0056] Please refer to Figure 6 and Figure 7 , the driving element 222 includes a first bracket 2221, a base 2222, a first electromagnetic member 2223 and a second electromagnetic member 2224: wherein, the first bracket 2221 has a mounting portion and a connecting portion 2225, and the mounting portion mounts the refraction element 221; the first bracket 2221 is connected to the base 2222 through the connecting portion 2225; the first electromagnetic member 2223 is disposed on the base 2222; the second electromagnetic member 2224 is disposed on the first bracket 2221 and corresponds to the position of the first electromagnetic member 2223; under the interaction of the first electromagnetic member 2223 and the second electromagnetic member 2224, the first bracket 2221 can move relative to the base 2222 through the connecting portion 2225.

[0057] It should be noted that the mounting portion of the above-mentioned first bracket 2221 is used to mount the refraction element 221. Wherein, the fixing manner of the mounting portion and the refraction element 221 is not limited in this application, and those skilled in the art can determine it by themselves.

[0058] Optionally, the connecting portion 2225 of the above-mentioned first bracket 2221 can be fixedly connected by screws or adhesively bonded to the base 2222 with elastic rubber.

[0059] The above-mentioned first electromagnetic member 2223 and second electromagnetic member 2224 can be a magnet and a coil respectively. Of course, they can also be interchanged. It should be noted that if the first electromagnetic member 2223 is a coil, the coil can be printed on the base 2222. That is to say, when the first electromagnetic member 2223 is a coil, the first electromagnetic member 2223 can be made together with the base 2222, so that the overall volume of the driving element 222 can be reduced.

[0060] In addition, the optical device may further include a controller, which is electrically connected to the first electromagnetic member 2223 or the second electromagnetic member 2224. In this way, the controller can control the current value and the magnetic field direction applied to the first electromagnetic member 2223 or the second electromagnetic member 2224, so as to control the rotation direction of the first bracket 2221.

[0061] Furthermore, the above-mentioned first electromagnetic member 2223 and second electromagnetic member 2224 may include multiple groups. For example, as Figure 7 and Figure 8 shown, both the first electromagnetic member 2223 and the second electromagnetic member 2224 include four groups, and the four groups of electromagnetic members or the second electromagnetic member 2224 are evenly distributed on the outer periphery of the refraction element 221.

[0062] In another feasible embodiment, please refer to Figure 9 , optionally, the dissipation mechanism 20 includes a spatial light modulation chip 21 and an electrostatic drive unit 23 that is insulatingly connected to the spatial light modulation chip 21. The electrostatic drive unit 23 is used to drive the spatial light modulation chip 21 to tilt along the first axis between a first position and a second position; the pixel displacement value between adjacent frame images and the spatial light modulation chip 21 satisfy the following formula:

[0063]

[0064] where a is a constant, b is the diameter of the speckle particles generated by the optical device, d is the distance between the spatial light modulation chip 21 and the lens assembly 30, and β is the deflection angle of the modulated light emitted by the spatial light modulation chip 21.

[0065] Among them, optionally, the above-mentioned electrostatic drive unit 23 includes a drive substrate 231 that is insulatingly connected to the spatial light modulation chip 21, a drive circuit board 232 located on the side of the drive substrate 231 facing away from the spatial light modulation chip 21, and an elastic connecting member 233 connecting the drive substrate 231 and the drive circuit board 232; a plurality of electrodes 234 electrically connected to the drive circuit board 232 are provided on the drive circuit board 232, and the plurality of electrodes 234 and the drive substrate 231 are respectively electrically connected to an external power supply.

[0066] The above-mentioned drive substrate 231 and drive circuit board 232 are elastically connected. In this embodiment, the drive substrate 231 and the drive circuit board 232 are connected by an elastic connecting member 233. The spatial light modulation chip 21 is insulatingly connected to the side of the drive substrate 231 facing away from the drive circuit board 232, as Figure 9 shown. Optionally, an insulating layer 235 may be provided between the spatial light modulation chip 21 and the drive substrate 231.

[0067] The driving circuit board 232 is provided with a plurality of electrodes 234 respectively electrically connected to the driving circuit board 232, and the plurality of electrodes 234 and the driving substrate 231 are respectively electrically connected to an external power supply. In this way, the driving circuit board 232 can apply alternating voltages with complementary phases on two electrodes 234 at symmetrical positions at any place among the plurality of electrodes 234, and the driving substrate 231 interacts with the two electrodes 234 applying the alternating voltages with complementary phases on the driving circuit board 232 when a first preset voltage is applied, so as to drive the spatial light modulation chip 21 to deflect by a target angle along its first axis.

[0068] In addition, in this embodiment, the optical device further includes an illumination component disposed on the light-emitting side of the light source 10 and the light-incident side of the dissipation mechanism 20, and the illumination component is used for homogenizing and shaping the light beam emitted by the light source 10. In this way, the image quality obtained by the optical device is better.

[0069] On the other hand, the present invention provides a projection system, and the projection system includes the above-mentioned optical device. Since the specific structure and beneficial effects of the optical device have been described and explained in detail above, the present application will not repeat them here.

[0070] On the other hand, the present invention provides an interaction method, please refer to Figure 10 ., and the interaction method includes the above-mentioned optical device, and the interaction method includes the following steps:

[0071] S100. The optical device displays a first interface;

[0072] S1200. The user sends a control signal through a wireless device, a voice device or a gesture;

[0073] S300. The optical device responds to the control signal and displays a second interface, and the second interface includes a selection interface;

[0074] S400. The user selects an option on the selection interface to control the dissipation mechanism 20, and the options include a first mode and / or a second mode. In the first mode, the dissipation mechanism 20 works, and in the second mode, the dissipation mechanism 20 does not work.

[0075] Among them, the above-mentioned first interface is a user interface. The optical device displays the first interface, and the user can send a control signal according to the first interface. In this way, the optical device can display the second interface in response to the control signal, and the second interface includes a selection interface.

[0076] The above-mentioned selection interface includes options for controlling the dissipation mechanism 20. Among them, the options include a first mode and / or a second mode. The first mode is a mode in which the dissipation mechanism 20 works, and the second mode is a mode in which the dissipation mechanism 20 does not work. In this way, in step S400, the user can select the first mode or the second mode as needed.

[0077] Of course, the triggering of the above-mentioned first mode or second mode may not be triggered by user operation, but when the detected imaging quality meets a certain threshold, the mode switch is triggered or triggered according to the change of ambient light. When the ambient light is bright, that is, during the day, the speckle mode is turned on / off; when the ambient light is dim, that is, at night, the speckle mode is turned off / on.

[0078] In addition, it should be noted that the user sends a control signal through a wireless device, a voice device or a gesture. The above-mentioned wireless device may be a remote control or a mobile phone, etc., the above-mentioned voice device may be a remote control or a voice collection device, and the gesture signal may be collected by a projection camera or an infrared collection device.

[0079] In addition, in this embodiment, the first mode may further include multiple sub-modes. For example, the first mode may further include a first sub-mode, a second sub-mode and a third sub-mode. Among them, the first sub-mode may be a speckle elimination mode with a first intensity (i.e., a general speckle elimination mode), the second sub-mode is a speckle elimination mode with a second intensity (i.e., a general enhanced speckle elimination mode), and the third sub-mode further includes an image parameter adjustment mode (i.e., the third sub-mode includes an image parameter adjustment mode in addition to the speckle elimination mode, and can also be called a high-profile mode). The first intensity is less than the second intensity, and the image parameters include any one or more of image color, image resolution, image brightness and image color gamut.

[0080] The above-mentioned second mode may also be referred to as a normal mode or a low-profile mode.

[0081] In addition, at least one of the above-mentioned first sub-mode, second sub-mode and third sub-mode has the function of adjusting the degree of speckle elimination. The function of adjusting the degree of speckle elimination can be achieved by changing the number of deflection times of the deflection angle of the light beam by the dissipation mechanism 20, and / or by changing the deflection angle of the light beam by the dissipation mechanism 20. That is, for different degrees of speckle elimination, the number of times or the deflection angle of the speckle displacement unit 22 or the electrostatic drive unit 23 deflecting the corresponding angle can gradually increase or decrease per unit time.

[0082] The above are only optional embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

[0083] In addition, it should be noted that in the above specific embodiments, the various specific technical features described can be combined in any suitable manner without conflict. To avoid unnecessary repetition, the present invention will not separately describe various possible combination methods.

Claims

1. An optical device, characterized in that, it includes a light source, a dissipation mechanism located on the light-emitting side of the light source, and a lens assembly located on the light-emitting side of the dissipation mechanism; the light source is used to emit a light beam, and the dissipation mechanism is used to tilt along a first axis between a first position and a second position, so that the light beam passes through the lens assembly to emit a frame image, and different frame images are projected onto different positions of a projection screen for superimposed display; there is a pixel offset between adjacent frame images.

2. The optical device according to claim 1, characterized in that, the dissipation mechanism includes a spatial light modulation chip and a speckle displacement unit; the speckle displacement unit is located between the light-emitting side of the spatial light modulation chip and the light-incident side of the lens assembly; the spatial light modulation chip is used to modulate the light beam, and the speckle displacement unit is used to deflect the light beam emitted by the spatial light modulation chip.

3. The optical device according to claim 2, characterized in that, the speckle displacement unit includes a refraction element and a driving element, the refraction element is arranged on the light-emitting side of the spatial light modulation chip, and the driving element is used to drive the refraction element to tilt along the first axis between a first position and a second position. The pixel displacement value between adjacent frame images and the refraction element satisfy the following formula: (a 2 b 2 +q 2 -m 2 q 2 )sin 2 θ - 2absin 3 θ + 2abqm 2 sinθ = a 2 b 2 m 2 wherein, θ is the deflection angle of the refraction element, m is the refractive index of the refraction element, q is the thickness of the refraction element, b is the diameter of the speckle particles generated by the optical device, and a is a constant.

4. The optical device according to claim 1, characterized in that, the dissipation mechanism includes a spatial light modulation chip and an electrostatic driving unit insulatedly connected to the spatial light modulation chip, and the electrostatic driving unit is used to drive the spatial light modulation chip to tilt along the first axis between a first position and a second position; the pixel displacement value between adjacent frame images and the spatial light modulation chip satisfy the following formula: wherein, a is a constant, b is the diameter of the speckle particles generated by the optical device, d is the distance between the spatial light modulation chip and the lens assembly, and β is the deflection angle of the modulated light emitted by the spatial light modulation chip.

5. The optical device according to claim 3, characterized in that, the driving element includes: a first bracket having a mounting portion and a connecting portion, and the mounting portion mounts the refraction element; a base body, and the first bracket is connected to the base body through the connecting portion; a first electromagnetic member provided on the base body; a second electromagnetic member provided on the first bracket and corresponding to the first electromagnetic member in position; under the interaction of the first electromagnetic member and the second electromagnetic member, the first bracket can move relative to the base body through the connecting portion.

6. The optical device according to claim 4, characterized in that, The electrostatic driving unit includes a driving substrate insulated and connected to the spatial light modulation chip, a driving circuit board located on the side of the driving substrate away from the spatial light modulation chip, and an elastic connecting member connecting the driving substrate and the driving circuit board; the driving circuit board is provided with a plurality of electrodes respectively electrically connected to the driving circuit board, and the plurality of electrodes and the driving substrate are respectively electrically connected to an external power supply.

7. The optical device according to claim 1, It is characterized in that The optical device further comprises an illumination component arranged on the light emitting side of the light source and the light incident side of the dissipation mechanism, and the illumination component is used for homogenizing and shaping the light beam emitted by the light source.

8. A projection system, It is characterized in that An optical device comprising any one of claims 1 to 7.

9. An interactive method, Features: The optical device according to any one of claims 1 to 7, wherein the interaction method comprises the following steps: The optical device displays a first interface; The user sends a control signal via a wireless device, a voice device, or a gesture; The optical device displays a second interface in response to the control signal, wherein the second interface includes a selection interface; The user selects an option on the selection interface to control the dissipation mechanism, wherein the option includes a first mode and / or a second mode. In the first mode, the dissipation mechanism works, and in the second mode, the dissipation mechanism does not work.

Images