TWM453857U - Laser speckle elimination device and laser projection system using the same thereof - Google Patents

Abstract

The present invention discloses a laser speckle elimination device and a laser projection system using the same. The laser speckle elimination device includes a asymmetric body and an electromagnetic module. The asymmetric body has a suspension part used to bear an optical property modulation means of the laser projection system and a suspension module used to support the suspension part. The electromagnetic module is arranged on a lateral side of the asymmetric body and has an electromagnetic coil and a magnet. In which, one of the electromagnetic coil and the magnet is arranged on the suspension part and apart from another one of the electromagnetic coil and the magnet, such that the suspension part is driven to conduct a curve motion when the electric current passes through the electromagnetic coil.

Description

Laser speckle elimination device and laser projection using the laser speckle elimination device system

The present invention relates to a laser speckle elimination device and a laser projection system using the same, in particular to a laser speckle elimination device and laser projection for eliminating laser speckle by electromagnetically actuated power system.

In daily life, the projection system is often used to project graphics or image data onto the projection surface, which makes the user more visually comfortable when viewing, and the electronic equipment has a trend toward light, thin and short. In order to meet the needs of human nature, the projection system is no exception to miniaturization. It can be applied to electronic products such as 3G mobile phones, PDAs, etc., or it can be a portable projection system, so that users can use the projection system everywhere. Play the movie you want to watch and easily achieve the entertainment effect.

Please refer to FIG. 1 , which is a structural block diagram of a conventional projection system. The projection system 1 includes a light source device 11, an optical processing module 12, a display component 13 and an optical lens 14; wherein the display component 13 is configured to present an electronic image frame, and the light source device 11 is configured to provide an illumination source to the display component 13, That is to say, the light source device 11 outputs a plurality of illumination beams L1, and some of the illumination beams L1 are projected onto the display element 13 after passing through the optical processing module 12, and are converted according to the electronic image frame. The plurality of imaging beams L2 are incident on the optical lens 14 via the optical processing module 12, and the electronic image frame presented by the display element 13 is projected by the optical lens 14 to the front projection surface 8 on.

In particular, as the projection system gradually develops toward miniaturization, the luminous efficiency of the light source device becomes the key in the development process. However, most of the light source devices in the current projection system use the light emitting diode (LED) as the light source. However, the efficiency of the light-emitting diode to convert electrical energy into light energy is so limited that in order for the amount of light output by the projection system to reach the required lumen amount, more driving power must be consumed, and more driving power is generated. More heat is produced and needs to be solved.

Therefore, there is a technology that proposes to use a laser light source as a light source of a light source device because the laser light source has a large photoelectric conversion efficiency and can achieve a large color saturation. However, since the laser beam has a high degree of homology, that is, the laser beam output from the laser source has optical characteristics of high energy, uniform wavelength, single frequency, and good collimation, so that the laser source is applied to the projection system. When the light source device is used, the projection surface may cause laser speckle.

In detail, the general projection surface is a flat surface under the macroscopic condition, but under the microscopic condition, it is a rough surface showing the pit hole. When the laser beam is irradiated on the projection surface, the laser beam is irradiated. A reflection is generated on the rough surface to form a plurality of reflected waves, and the reflected waves may interfere constructively or destructively with each other, causing the human eye to see the pattern of light and dark particles, which is a phenomenon of laser speckle. . Therefore, the laser speckle can interfere with the normal presentation of the image and reduce the visual comfort of the user.

Please refer to FIG. 2 , which is a schematic diagram of a conventional implementation architecture for eliminating laser speckle. It is a conventional practice to provide a diffusing film 15 that can be moved in the laser beam path for the laser beam L1' outputted by the laser source 11' to pass therethrough, thereby destroying the homology of the laser beam L1'. In order to reduce the number of lasers on the projection surface, the principles are known to those skilled in the art and will not be described again here. Generally, the diffusion sheet 15 is moved in such a manner that a single driving element (not shown) is used to drive the diffusion sheet 15 to perform a single-axis (for example, only the X-axis or only the Y-axis), or to use a double drive. The element (not shown) drives the diffusion sheet 15 to perform a biaxial motion (such as a curved motion or a circular motion) on the biaxial (X-axis and Y-axis).

In particular, although only the diffusion of the diffusion sheet 15 for the uniaxial movement can reduce the laser dispersion on the projection surface, the elimination effect is not as good as the biaxial movement of the drive diffusion sheet 15; However, in order to drive the diffusion sheet 15 to perform biaxial overlying movement, it is necessary to use more than two driving elements, which causes an increase in manufacturing cost. Therefore, how to design a laser speckle elimination device with low manufacturing cost and excellent laser beam elimination effect is an urgent problem to be overcome. After all, what consumers expect is that they can obtain higher consumption with less consumption. Quality visual enjoyment.

Accordingly, U.S. Patent No. 8,130,445 discloses the use of electromagnetic actuation to drive a component having a diffusion function for vibration or curvilinear motion. However, a component having a diffusion function is disposed at the screen end, not at the laser source end. Moreover, the invention of Taiwan Patent No. 201100862 discloses that an electromagnetically actuated element is used to drive a component having a diffusion function for vibration or curve motion, but The function of the discrete function is a lens combination element, not just a diffusion sheet in the form of a single element.

It is an object of the present invention to provide a laser speckle reduction device, and more particularly to a laser speckle reduction device for eliminating laser speckle by electromagnetic actuation.

Another object of the present invention is to provide a laser projection system, and more particularly to a laser projection system for eliminating laser speckle by electromagnetic actuation.

In a preferred embodiment, the present invention provides a laser speckle elimination device for use in a laser projection system, comprising: an asymmetric body, comprising: a carrier portion for carrying one of the laser projection systems a light modulation means; and a suspension module for supporting the bearing portion; and a magnetic control module located on one side of the asymmetric body, having at least one electromagnetic coil and a magnet, and the electromagnetic coil And one of the magnets is disposed on a side of the carrying portion and spaced apart from the other of the electromagnetic coil and the magnet to drive the electromagnetic coil to be driven The carrier performs a curved motion.

In a preferred embodiment, one side of the carrying portion has a coil winding groove. It is used for the electromagnetic coil to be wound thereon.

In a preferred embodiment, one side of the carrying portion has an electromagnetic coil welding post for soldering one end of the electromagnetic coil thereto.

In a preferred embodiment, the magnetic control module further has a first yoke that is attracted to the magnet.

In a preferred embodiment, the at least one magnetic control module further has a second yoke that is attracted to the magnet, and the magnet is located between the first yoke and the second yoke.

In a preferred embodiment, the laser speckle elimination device further includes a body, and the base has a receiving groove for receiving the asymmetric body.

In a preferred embodiment, one side of the seat has a fixing groove for the magnet to be fixed therein.

In a preferred embodiment, the laser speckle elimination device further includes a further magnetic control module on the other side of the asymmetric body, which has at least one other electromagnetic coil and another magnet, and One of the other electromagnetic coils and the other magnet is disposed on the other side of the one of the carrying portions, and is separated from the other of the other electromagnetic coil and the other of the other magnets. a distance; wherein the other electromagnetic coil is electrically connected to the electromagnetic coil.

In a preferred embodiment, the opposite sides of the carrying portion have a coil winding slot and a further coil winding slot for respectively winding the electromagnetic coil and the other electromagnetic coil thereon.

In a preferred embodiment, the corresponding side of the two bearing portions respectively have an electromagnetic coil welding column and a further electromagnetic coil welding column for soldering one end of the electromagnetic coil and one end of the other electromagnetic coil. On it.

In a preferred embodiment, the magnetic control module and the other magnetic control module further have a first yoke and a second yoke, respectively, and are respectively adsorbed on the magnet and the other magnet. .

In a preferred embodiment, the magnetic control module and the other magnetic control module further have a second yoke and a second magnet, respectively, and are respectively adsorbed on the magnet and the other magnet; Wherein the magnet is located between the first yoke and the second yoke, and the other magnet is located between the other first yoke and the other second yoke.

In a preferred embodiment, the laser speckle elimination device further includes a body, and the base has a receiving groove for receiving the asymmetric body.

In a preferred embodiment, the two opposite sides of the base have a fixing slot and a further fixing slot for respectively fixing the magnet and the other magnet.

In a preferred embodiment, the asymmetric main system changes the center of mass of the load bearing portion, changes the elastic center position of the suspension module, and changes the magnetic control module and the other magnetic control module. At least one of the electromagnetic force center positions of the group achieves an asymmetrical characteristic.

In a preferred embodiment, the suspension module includes at least two elastic bodies and a power supply circuit board, and the two ends of each of the elastic bodies are respectively connected to the power supply circuit board. And the carrying portion, so that the carrying portion is suspended on the power supply circuit board.

In a preferred embodiment, at least one of the elastic bodies is made of a material different from the other elastomers, or at least one of the elastomers has a different size from the other elastomers. The specification, or at least two of the elastomers, are asymmetrically arranged.

In a preferred embodiment, the carrying portion is in the shape of a rectangular parallelepiped, and the side of the carrying portion is located at one of the short sides of the rectangular parallelepiped, or the side of the carrying portion is located at one of the long sides of the rectangular parallelepiped. side.

In a preferred embodiment, the curved motion is a curved curve motion.

In a preferred embodiment, the curved motion is a circular arc motion or a non-closed curved motion.

In a preferred embodiment, the optical modulation means is a diffusion sheet, an optical diffraction element or a microlens array.

In a preferred embodiment, the present invention also provides a laser projection system, including: a laser light source for outputting a plurality of laser beams; a display element for presenting an image frame; and a light modulation means, And disposed between the laser light source and the display element, and the laser beam is passed through to the display element; an optical lens for receiving the laser beams from the display element, and Projecting onto a projection surface such that the image frame is displayed on the projection surface; a laser speckle elimination device for moving the optical modulation means, comprising: an asymmetric body, comprising: a carrying portion for carrying the optical modulation means; and a suspension module for Supporting the carrying portion; and a magnetic control module located on one side of the asymmetric body, which drives the carrying portion to perform a curved motion after being subjected to current.

In a preferred embodiment, the display element is a reflective liquid crystal (LCOS) component, a digital micro mirror (DMD) component, or a transmissive liquid crystal (LCD) component.

In a preferred embodiment, the magnetic control module has at least one electromagnetic coil and a magnet, and one of the electromagnetic coil and the magnet is disposed on one side of the carrying portion, and the electromagnetic coil and The other of the magnets is separated by a distance such that the electromagnetic coil is energized to drive the load bearing portion to perform the curved motion.

In a preferred embodiment, one side of the carrying portion has a coil winding groove for the electromagnetic coil to be wound thereon.

In a preferred embodiment, one side of the carrying portion has an electromagnetic coil welding post for soldering one end of the electromagnetic coil thereto.

In a preferred embodiment, the magnetic control module further has a first yoke that is attracted to the magnet.

In a preferred embodiment, the at least one magnetic control module further has a second yoke. It is adsorbed on the magnet, and the magnet is located between the first yoke and the second yoke.

In a preferred embodiment, the laser speckle elimination device further includes a body, and the base has a receiving groove for receiving the asymmetric body.

In a preferred embodiment, one side of the seat has a fixing groove for the magnet to be fixed therein.

In a preferred embodiment, the laser speckle elimination device further includes a further magnetic control module on the other side of the asymmetric body, which has at least one other electromagnetic coil and another magnet. And one of the other electromagnetic coil and the other magnet is disposed on the other side of the one of the carrying portions, and is separated from the other one of the other electromagnetic coil and the other magnet a distance; wherein the other electromagnetic coil is electrically connected to the electromagnetic coil.

In a preferred embodiment, the opposite sides of the carrying portion have a coil winding slot and a further coil winding slot for respectively winding the electromagnetic coil and the other electromagnetic coil thereon.

In a preferred embodiment, the corresponding side of the two bearing portions respectively have an electromagnetic coil welding column and a further electromagnetic coil welding column for soldering one end of the electromagnetic coil and one end of the other electromagnetic coil. On it.

In a preferred embodiment, the magnetic control module and the other magnetic control module further have a first yoke and a second yoke, respectively, and are respectively adsorbed on the magnet and the other magnet. .

In a preferred embodiment, the magnetic control module and the other magnetic control module further have a second yoke and a second magnet, respectively, and are respectively adsorbed on the magnet and the other magnet; Wherein the magnet is located between the first yoke and the second yoke, and the other magnet is located between the other first yoke and the other second yoke.

In a preferred embodiment, the laser speckle elimination device further includes a body, and the base has a receiving groove for receiving the asymmetric body.

In a preferred embodiment, the two opposite sides of the base have a fixing slot and a further fixing slot for respectively fixing the magnet and the other magnet.

In a preferred embodiment, the asymmetric main system changes the center of mass of the load bearing portion, changes the elastic center position of the suspension module, and changes the magnetic control module and the other magnetic control module. At least one of the electromagnetic force center positions of the group achieves an asymmetrical characteristic.

In a preferred embodiment, the suspension module includes at least two elastic bodies and a power supply circuit board, and the two ends of each of the elastic bodies are respectively connected to the power supply circuit board and the carrying portion, so that the load The part is suspended on the power supply circuit board.

In a preferred embodiment, at least one of the elastic bodies is made of a material different from the other elastomers, or at least one of the elastomers has a different size from the other elastomers. The specification, or at least two of the elastomers, are asymmetrically arranged.

In a preferred embodiment, the carrying portion is in the shape of a rectangular parallelepiped, and the carrying portion is The side tie is on one of the short sides of the rectangular parallelepiped, or the side of the load-bearing portion is located on one of the long sides of the rectangular parallelepiped.

In a preferred embodiment, the curved motion is a curved curve motion.

In a preferred embodiment, the curved motion is a circular arc motion or a non-closed curved motion.

In a preferred embodiment, the optical modulation means is a diffusion sheet, an optical diffraction element or a microlens array.

First of all, the laser speckle elimination device provided by the present invention can be applied to the laser projection system of the three embodiments described below, but is not limited to the application scope of the present invention; among them, the laser speckle elimination Specific embodiments of the device will be described in detail later.

Please refer to FIG. 3A , which is a schematic diagram of the structural concept of the first embodiment of the laser projection system. The laser projection system 2a includes a laser light source 21a, a display element 22a, an optical lens 23a, a light modulation means 24a, and a laser speckle elimination device 25a, and the optical modulation means 24a is provided to the laser light source 21a and the display element. Between the 22a, and disposed on the laser speckle elimination device 25a, the display element 22a is disposed between the optical modulation means 24a and the optical lens 23a; wherein the laser source 21a is used to output a plurality of laser beams, and The laser beams are cast after passing through the optical modulation means 24a The optical lens 23a receives the laser beams from the display element 22a and projects them onto the front projection surface 9 to cause the image to be displayed on the projection surface. 9; in this embodiment, the display element 22a is a transmissive liquid crystal (LCD) element, and the optical modulation means is a diffusion sheet, an optical diffraction element or a microlens array, but not This is limited to this.

Please refer to FIG. 3B , which is a schematic conceptual view of the second embodiment of the present laser projection system. The laser projection system 2b includes a laser light source 21b, a display element 22b, an optical lens 23b, a photo-modulation means 24b, a laser speckle elimination device 25b, and a PBS (Polarized Beam Splitter) 26b, and is optical. The modulation means 24b is disposed between the laser light source 21b and the polarization separation 稜鏡26b, and is disposed on the laser speckle elimination device 2ba, and the polarization separation 稜鏡24b is provided on the display element 22b, the laser light source 21b, and the optical lens. The laser light source 21b is configured to output a plurality of laser beams, and the laser beams are reflected by the optical modulation means 24b and the polarization separation 稜鏡 26b to be displayed on the display element for presenting an image. On the 22b, the optical lens 23b receives the laser beams from the display element 22b and passes through the polarization separation 稜鏡24b, and projects them onto the front projection surface 9, thereby causing the image frame to be displayed on the projection surface 9. In this embodiment, the display element 22b is a reflective liquid crystal (LCOS) element.

Please refer to FIG. 3C , which is a schematic diagram of the structural concept of the third embodiment of the present laser projection system. The laser projection system 2c includes a laser light source 21c, a display element 22c, an optical lens 23c, an optical modulation means 24c, and a laser speckle elimination device 25c. And a total internal reflection T (TIR) 26c, and the optical modulation means 24c is disposed between the laser light source 21c and the total internal reflection 稜鏡 26c, and is disposed on the laser speckle elimination device 25c. The total internal reflection 稜鏡 26c is disposed between the display element 22c, the laser light source 21c, and the optical lens 23c. The laser light source 21c is configured to output a plurality of laser beams, and the laser beams are modulated by optical modulation. The means 24c and the total internal reflection 稜鏡 26c are then reflected onto the display element 22c for presenting an image, and the optical lens 23c receives the laser beams from the display element 22c and through the total internal reflection 稜鏡 26c, and The projection surface 9 is projected onto the front surface, and the image screen is displayed on the projection surface 9. In the present embodiment, the display element 22c is a digital micro mirror (DMD) element.

Furthermore, the laser speckle reduction device provided by the present invention can also be designed to be applied to a laser light source device applied to a laser projection system. Please refer to FIG. 4 , which is a schematic diagram of a structural concept of a laser light source device according to a preferred embodiment. The laser light source device 3 includes a laser light source 21d, a light modulation means 24d, and a laser speckle elimination device 25d, and the laser light source 21d is for outputting a plurality of laser beams, and the optical modulation means 24d is laser. The speckle elimination device 25d carries and is disposed on the traveling path of the laser beams for the laser beams to pass therethrough for outward output.

Next, a laser speckle elimination device applied to the above-described laser projection system and laser light source device is described, which drives a photo-modulation means to perform a curved motion, such as a circular arc, by electromagnetically actuating. Motion or non-closed curve motion, and the curve motion can be a moving curve for the laser light output by the laser source The beam passes therethrough, thereby destroying the homology of the laser beam, thereby reducing the laser dispersion on the projection surface; wherein, in the following embodiments, the optical modulation means is a single component in the form of a light modulation Change means, but not limited to this. Moreover, the principle of eliminating the laser dispersion by moving the optical modulation means is well known to those skilled in the art and will not be described herein.

Please refer to FIG. 5 to FIG. 8. FIG. 5 is a schematic structural view showing the appearance of the laser speckle elimination device according to the first preferred embodiment, and FIG. 6 is an exploded perspective view of the laser speckle elimination device shown in FIG. 7 is an exploded perspective view of the magnetic control module and the carrying portion of the laser speckle removing device shown in FIG. 5, and FIG. 8 is a partial side view showing the structure of the laser speckle removing device shown in FIG. 5.

The laser speckle elimination device 25 includes an asymmetric body 251, two magnetic control modules 252 and 253 respectively located on opposite sides of the asymmetric body 251, and a base 254; wherein the asymmetric body 251 has a light modulation The carrying portion 2511 of the means 24 and the suspension module 2512 for supporting the carrying portion 2511, and the magnetic control module 252 has at least an electromagnetic coil 2521 and a magnet 2522 spaced apart from the electromagnetic coil 2521, and another magnetic control module 253 also has at least another electromagnetic coil 2531 electrically connected to the electromagnetic coil 2521 and another magnet 2532 spaced apart from the other electromagnetic coil 2531.

In the preferred embodiment, the carrying portion 2511 has two coil winding grooves 25111 and two electromagnetic coil welding posts 25112, and the two coil winding grooves 25111 are respectively disposed on two sides of the carrying portion 2511 and are provided with electromagnetic coils. 2521 and another electromagnetic coil 2531 is wound thereon, and the two electromagnetic coil welding posts 25112 are also respectively disposed on two sides of the carrying portion 2511, and one end of the electromagnetic coil 2521 and one end of the other electromagnetic coil 2531 are welded thereto.

In addition, the suspension module 2512 includes a plurality of elastic bodies 25121 and a power supply circuit board 25122, and the two ends of each elastic body are respectively connected to the power supply circuit board 25122 and the carrying portion 2511, so that the carrying portion 2511 is suspended in the power supply. On the circuit board 25122, at least two of the elastic bodies 25121 are electrically connected to the electromagnetic wire 2521 and the other electromagnetic coil 2531, respectively, so that the current is supplied to the power supply circuit board 25122 after the current is supplied. It can be transmitted to the electromagnetic coil 2521 and the other electromagnetic coil 2531 through the elastic body 25121; however, although the number of the elastic bodies 25121 is shown as four in the drawing, it is not limited thereto, that is, as long as the number of the elastic bodies 25121 is More than two can achieve the effect of the cost case.

In addition, in the preferred embodiment, the base 254 is fixed on the power supply circuit board 25122, and has two fixing slots 2541 respectively disposed on two sides of the base 254 and a capacity between the two fixing slots 2541. The slot 2542 is configured to respectively fix the magnet 2522 and the other magnet 2532 therein, and the receiving slot 2542 is for receiving the asymmetric body 251; however, the base 254 is only a fixed magnet. 2522 and another embodiment of the magnet 2532, so the base 254 is not intended to define the necessary components of the embodiment, and those skilled in the art can carry out any equal variation design according to the actual application requirements to fix the magnet 2522 and another A magnet 2532.

Next, the operation of the laser speckle elimination device 25 will be described. When the electromagnetic coil When the second electromagnetic coil 2531 is energized, the electromagnetic field is generated at both ends of the carrying portion 2511 to interact with the magnet 2522 and the other magnet 2532 adjacent to the two ends of the carrying portion 2511, respectively, thereby driving the carrying portion. The movement of 2511 is performed, and the optical modulation means 24 on the carrying portion 2511 moves synchronously with the carrying portion 2511.

In detail, when the electromagnetic coil 2521 and the other electromagnetic coil 2531 are supplied with a positive electric current, one end of the carrying portion 2511 (the end of the electromagnetic coil 2521) and the magnet 2522 are in a suction relationship, and the other end of the carrying portion 2511 ( The other electromagnetic coil 2531 end) has a repulsive relationship with the other magnet 2532, so that the bearing portion 2511 moves in the direction of the magnet 2522. At this time, when the electromagnetic coil 2521 and the other electromagnetic coil 2531 are again subjected to a negative current, the bearing One end of the portion 2511 (the end of the electromagnetic coil 2521) and the magnet 2522 are converted into a repulsive relationship by the attracting relationship, and the other end of the carrying portion 2511 (the end of the other electromagnetic coil 2531) and the other magnet 2532 are repelled. The relationship is converted into a sucking relationship such that the carrier portion 2511 moves in the direction of the other magnet 2532. Therefore, when the carrying portion 2511 is continuously driven by the positive current and the negative current, the optical modulation means 24 reciprocates in the same portion.

In particular, the asymmetric body 251 of the present invention achieves an asymmetrical characteristic by at least one of the following three embodiments, and the carrier portion 2511 is designed to reciprocate by the asymmetrical characteristic. The movement trajectory and the movement characteristic; wherein the first implementation of the asymmetric characteristic is to change the centroid position of the bearing portion 2511 away from the entire center of the bearing portion 2511, such as The material density distribution of the variable carrying portion 2511 or the load at different positions of the bearing portion 2511 is changed.

The second embodiment in which the asymmetric characteristic is achieved is to change the position of the synthetic elastic center of the elastic body 25121, such that at least one of the elastic bodies 25121 is made of a material different from the other elastic body 25121. At least one of the elastic bodies 25121 has a different size from the other elastic bodies 25121 or the asymmetrical bodies 25121 are asymmetrically disposed.

Moreover, the third embodiment that achieves the asymmetric characteristic is to change the electromagnetic force center position of the electromagnetic coils 2521 and 2531, such as the number of windings of the two electromagnetic coils 2521 and 2531 wound around the two coil winding grooves 25111, respectively. When the carrying portion 2511 is energized by the two electromagnetic coils 2521 and 2531, the two ends of the carrying portion 2511 generate different electromagnetic fields.

Therefore, in this case, the centroid position of the bearing portion 2511, the synthetic elastic center position of the elastic body 25121, the electromagnetic force center position of the electromagnetic coil 2521, 2531, or a combination of the above means (ie, the centroid position, The position of the elastic center and the relative positional relationship between the positions of the electromagnetic force centers are such that the trajectory of the desired movement of the bearing portion 2511 is achieved; wherein the movement trajectory of the bearing portion 2511 can be specially designed as a circular arc trajectory (as shown in FIG. 8). A non-closed reciprocating curve such as a curve Z, a 1/4 circular curve trajectory. However, the foregoing is only an example of an embodiment in which the symmetric body 251 achieves an asymmetrical characteristic, and an example of the movement trajectory of the plurality of carrying portions 2511, but is not limited thereto, and may be performed by a person familiar with the present technology according to actual application requirements. Any equal change design.

Preferably, in order to make the two magnetic control modules 252, 253 have better magnetic control effects, the magnetic control module 252 further has a first yoke 2523 and a second yoke 2524, and a first yoke 2523 thereof. A second yoke 2524 is adsorbed on the magnet 2522, and the magnet 2522 is located between the first yoke 2523 and the second yoke 2524. This will help the magnetic closure of the first magnet 2522 and reduce the loss of magnetic energy. Similarly, the other magnetic control module 253 further has another first yoke 2533 and another second yoke 2534, and the other first yoke 2533 and the other second yoke 2534 are adsorbed to each other. A magnet 2532 is placed between the other first yoke 2533 and the other second yoke 2534, which facilitates magnetic closure of the other magnet 2532, reducing magnetic energy loss.

In addition, if the magnetic control module 252 has only one of the first yoke 2523 and the second yoke 2524, and the other magnetic control module 253 has only the other first yoke 2533 and another second yoke. One of the irons 2534 may also contribute to the magnetic closure of the magnet 2522 and the other magnet 2532, but the effect is not as if the magnetron module 252 has both the first yoke 2523 and the second yoke 2524, and another Preferably, the magnetron module 253 has another first yoke 2533 and another second yoke 2534. However, the first yoke 2523, the second yoke 2524, the other first yoke 2533, and the other second yoke 2534 are not essential elements for defining the embodiment.

In particular, the description of the laser speckle elimination device 25 is merely an embodiment, and anyone skilled in the art can perform any application according to actual application requirements. The design of the changes. For example, the laser speckle elimination device 25 may include only one of the two magnetron modules 252, 253, so that the effect of the drive carrier portion 2511 for reciprocating curve motion can also be achieved. Moreover, the positions of the magnets 2522 and the electromagnetic coils 2521 can be mutually adjusted, and the positions of the other magnets 2532 and the other electromagnetic coils 2531 can be mutually adjusted, that is, the electromagnetic coils 2521 and the other electromagnetic coils 2531 are respectively wound. On the two sides of the base 254, the magnets 2522 and the other magnets 2532 are respectively disposed on the two sides of the carrying portion 2511, so that the driving bearing portion 2511 can also perform the reciprocating curve motion.

For example, please refer to FIG. 9 , which is a partial structural diagram of a laser beam speckle elimination device according to a second preferred embodiment. The laser speckle elimination device 25' of the preferred embodiment is substantially similar to that described in the first preferred embodiment of the present invention, and will not be described herein; however, the preferred embodiment and the first preferred embodiment are preferred. The difference in the embodiment is that the positions of the two electromagnetic coils 2521', 2531' are differently wound around the carrying portion 2511', that is, in the first preferred embodiment, the two electromagnetic coils 2521, 2531 are respectively wound around the carrying portion. 2511 bis corresponds to the short side, and in the preferred embodiment, the two electromagnetic coils 2521', 2531' are respectively wound on the corresponding long sides of the carrier portion 2511'.

According to the description of the above embodiments, the laser speckle elimination device in the laser projection system of the present invention drives the optical modulation means to perform biaxial curved curve motion by means of its centroid shift and electromagnetic actuation. Obviously, the problem of having to provide a plurality of driving elements in order to make the optical modulation means perform biaxially moving motion in the conventional practice is solved, which not only effectively reduces the manufacturing cost, but also takes into account the elimination effect of the laser scattered shift. For a very industrially useful creation.

The above description is only the preferred embodiment of the present invention, and is not intended to limit the scope of the patent application of the present invention. Therefore, any equivalent changes or modifications made without departing from the spirit of the present invention should be included in the present case. Within the scope of the patent application.

1‧‧‧Projection system

2a‧‧‧Laser Projection System

2b‧‧‧Laser Projection System

2c‧‧‧Laser Projection System

3‧‧‧Laser projection device

8‧‧‧projection surface

9‧‧‧projection surface

11‧‧‧Light source device

11'‧‧‧Laser light source

12‧‧‧Optical processing module

13‧‧‧Display components

14‧‧‧ optical lens

15‧‧‧Diffuser

21a‧‧‧Laser light source

21b‧‧‧Laser light source

21c‧‧‧Laser light source

21d‧‧‧Laser light source

22a‧‧‧Display components

22b‧‧‧ display components

22c‧‧‧ display components

23a‧‧‧Optical lens

23b‧‧‧Optical lens

23c‧‧‧Optical lens

24‧‧‧Light modulation means

24a‧‧‧Photometric means

24b‧‧‧Light modulation means

24c‧‧‧Light modulation means

24d‧‧‧Light modulation

25‧‧‧Laser speckle elimination device

25a‧‧‧Laser speckle elimination device

25b‧‧‧Laser speckle elimination device

25c‧‧‧Laser speckle elimination device

25d‧‧‧Laser speckle elimination device

25'‧‧‧Laser speckle elimination device

26b‧‧‧ Polarized separation稜鏡

26c‧‧‧ Total internal reflection稜鏡

251‧‧‧Asymmetric subject

252‧‧‧Magnetic Control Module

253‧‧‧Magnetic control module

254‧‧‧ body

2511‧‧‧Loading Department

2511’‧‧‧ Carrying Department

2512‧‧‧suspension module

2521‧‧‧Electromagnetic coil

2521'‧‧‧Electromagnetic coil

2522‧‧‧ magnet

2522"‧‧‧ Magnet

2523‧‧‧First yoke

2524‧‧‧second yoke

2531‧‧‧Electromagnetic coil

2531'‧‧‧Electromagnetic coil

2532‧‧‧ Magnet

2532"‧‧‧ Magnet

2533‧‧‧First yoke

2534‧‧‧second yoke

2541‧‧‧fixed slot

2542‧‧‧ accommodating slots

25111‧‧‧Coil winding groove

25112‧‧‧Electromagnetic coil welding column

25121‧‧‧ Elastomers

25122‧‧‧Power supply board

L1‧‧‧ illumination beam

L1’‧‧‧Laser beam

L2‧‧‧ imaging beam

Figure 1 is a block diagram showing the structure of a conventional projection system.

Figure 2: Schematic diagram of the architectural concept of the conventional implementation of eliminating laser speckle.

FIG. 3A is a schematic diagram showing the structural concept of the first embodiment of the present laser projection system.

FIG. 3B is a schematic conceptual view of the second embodiment of the present invention.

FIG. 3C is a schematic diagram showing the structural concept of the third embodiment of the present laser projection system.

Fig. 4 is a schematic view showing the structure of a laser light source device according to a preferred embodiment.

FIG. 5 is a schematic view showing the appearance of the artificial laser speckle elimination device in the first preferred embodiment.

Figure 6 is an exploded perspective view of the laser speckle elimination device shown in Figure 5.

Fig. 7 is an exploded perspective view showing the magnetic control module and the carrying portion of the laser speckle removing device shown in Fig. 5.

Figure 8 is a side view of a portion of the structure of the laser speckle reduction device.

Figure 9 is a partial structural view of the second preferred embodiment of the present invention.

24‧‧‧Light modulation means

25‧‧‧Laser speckle elimination device

251‧‧‧Asymmetric subject

252‧‧‧Magnetic Control Module

253‧‧‧Magnetic control module

254‧‧‧ body

2511‧‧‧Loading Department

2512‧‧‧suspension module

2521‧‧‧Electromagnetic coil

2522‧‧‧ magnet

2523‧‧‧First yoke

2524‧‧‧second yoke

2531‧‧‧Electromagnetic coil

2532‧‧‧ Magnet

2533‧‧‧First yoke

2534‧‧‧second yoke

2541‧‧‧fixed slot

2542‧‧‧ accommodating slots

25111‧‧‧Coil winding slot

25112‧‧‧Electromagnetic coil welding column

25121‧‧‧ Elastomers

25122‧‧‧Power supply board

Claims (44)

A laser speckle elimination device includes: an asymmetric body, comprising: a bearing portion for carrying a light modulation device of a laser projection system; and a suspension module for supporting the bearing portion And a magnetic control module on one side of the asymmetric body, having at least one electromagnetic coil and a magnet, and one of the electromagnetic coil and the magnet is disposed on one side of the carrying portion, and A distance is separated from the electromagnetic coil and the other of the magnets, so that the electromagnetic coil is driven to conduct a curve motion. The laser speckle elimination device of claim 1, wherein one side of the carrying portion has a coil winding groove for the electromagnetic coil to be wound thereon. The laser speckle elimination device of claim 1, wherein one side of the carrying portion has an electromagnetic coil welding post for soldering one end of the electromagnetic coil thereto. The laser speckle elimination device of claim 1, wherein the magnetron module further has a first yoke that is attracted to the magnet. The laser speckle elimination device of claim 4, wherein the at least one magnetic control module further has a second yoke that is adsorbed on the magnet, and the magnet is located on the first yoke and Between the second yokes. The laser speckle elimination device of claim 1, further comprising a body, and the base body has a receiving groove for receiving the asymmetric body. The laser speckle elimination device of claim 6, wherein one side of the seat body has a fixing groove for the magnet to be fixed therein. The laser speckle elimination device of claim 1, further comprising a further magnetic control module located on the other side of the asymmetric body, having at least one other electromagnetic coil and another a magnet, and one of the other electromagnetic coils and the other magnet is disposed on the other side of the one of the carrying portions, and the other of the other electromagnetic coil and the other magnet The distance is separated by a distance; wherein the other electromagnetic coil is electrically connected to the electromagnetic coil. The laser speckle elimination device of claim 8, wherein the opposite sides of the carrying portion respectively have a coil winding slot and a further coil winding slot for respectively supplying the electromagnetic coil and The other electromagnetic coil is wound thereon. The laser speckle elimination device of claim 8, wherein the corresponding side of the bearing portion has an electromagnetic coil welding column and a further electromagnetic coil welding column for the electromagnetic coil. One end and one end of the other electromagnetic coil are soldered thereto. The laser speckle elimination device of claim 8, wherein the magnetic control module and the other magnetic control module further have a first yoke and a further first yoke, respectively Adsorbed on the magnet and the other magnet. The laser speckle elimination device according to claim 11, wherein the magnetic control The module and the other magnetic control module further have a second yoke and a second magnet respectively, and are respectively adsorbed on the magnet and the other magnet; wherein the magnet is located in the first yoke And between the second yokes, and the other magnet is located between the other first yoke and the other second yoke. The laser speckle elimination device of claim 8, further comprising a body, and the base body has a receiving groove for receiving the asymmetric body. The laser speckle elimination device of claim 13, wherein the corresponding side of the second body has a fixing groove and a fixing groove for respectively fixing the magnet and the other magnet. In it. The laser speckle elimination device of claim 8, wherein the asymmetric main system changes the center position of the one of the load-bearing portions, changes a spring center position of the suspension module, and changes the magnetic control. An asymmetric characteristic is achieved between the module and at least one of the electromagnetic force center positions of the other of the magnetic control modules. The laser speckle elimination device of claim 1, wherein the suspension module comprises at least two elastic bodies and a power supply circuit board, and the two ends of each of the elastic bodies are respectively connected. The power supply circuit board and the carrying portion are configured to suspend the carrying portion on the power supply circuit board. The laser speckle elimination device of claim 16, wherein at least one of the elastic bodies is made of a material different from the other elastomers, or at least one of the elastomers The elastomer has a different size specification than the other elastomers, or at least two of the elastomers are asymmetrically disposed. The laser speckle elimination device of claim 1 or 8, wherein the carrying portion is in the shape of a rectangular parallelepiped, and the side of the bearing portion is in a short side of the rectangular parallelepiped, or is the bearing The side of the portion is located on one of the long sides of the rectangular parallelepiped. The laser speckle elimination device of claim 1 or 8, wherein the curve motion is a superficial curve motion. The laser speckle elimination device of claim 1 or 8, wherein the curve motion is a circular arc motion or a non-closed curved motion. The laser speckle elimination device of claim 1 or 8, wherein the optical modulation means is a diffusion sheet, an optical diffraction element or a microlens array. A laser projection system comprising: a laser light source for outputting a plurality of laser beams; a display element for presenting an image frame; and a light modulation means disposed on the laser light source and the display element And passing the laser beam therethrough to the display element; an optical lens for receiving the laser beams from the display element and projecting to a projection surface to make the image And a laser speculating means for modulating the optical modulation means, comprising: an asymmetric body, comprising: a carrying portion for carrying the light Sexual modulation means; a suspension module for supporting the bearing portion; and a magnetic control module on a side of the asymmetric body, which is driven to conduct a curve motion after being subjected to current. The laser projection system of claim 22, wherein the display component is a reflective liquid crystal (LCOS) component, a digital micro mirror (DMD) component, or a transmissive liquid crystal (LCD). element. The laser projection system of claim 22, wherein the magnetic control module has at least one electromagnetic coil and a magnet, and one of the electromagnetic coil and the magnet is disposed on one side of the bearing portion. And a distance between the electromagnetic coil and the other of the magnets, so that the electromagnetic coil is driven to conduct current to drive the curved portion to perform the curved motion. The laser projection system of claim 24, wherein one side of the carrying portion has a coil winding groove for the electromagnetic coil to be wound thereon. The laser projection system of claim 24, wherein one side of the carrying portion has an electromagnetic coil welding post for soldering one end of the electromagnetic coil thereto. The laser projection system of claim 24, wherein the magnetic control module further has a first yoke that is attracted to the magnet. The laser projection system of claim 27, wherein the at least one magnetic control module further has a second yoke that is attracted to the magnet, and the magnet is located at the first yoke and the first Between two yokes. The laser projection system of claim 24, wherein the laser speckle elimination device further comprises a body, and the base has a receiving groove for receiving the asymmetric body. The laser projection system of claim 29, wherein one of the sides of the base has a fixing groove for the magnet to be fixed therein. The laser projection system of claim 24, wherein the laser speckle elimination device further comprises a further magnetic control module located on the other side of the asymmetric body, which has at least one other An electromagnetic coil and a further magnet, and one of the other electromagnetic coil and the other magnet is disposed on the other side of the one of the carrying portions, and in the other electromagnetic coil and the other magnet The other one is separated by a distance; wherein the other electromagnetic coil is electrically connected to the electromagnetic coil. The laser projection system of claim 31, wherein two opposite sides of the carrying portion have a coil winding slot and a further coil winding slot for respectively supplying the electromagnetic coil and the other An electromagnetic coil is wound thereon. The laser projection system of claim 31, wherein the two corresponding sides of the bearing portion respectively have an electromagnetic coil welding column and a further electromagnetic coil welding column for supplying one end of the electromagnetic coil and One end of the other electromagnetic coil is welded thereto. The laser projection system of claim 31, wherein the magnetic control module and the other magnetic control module further have a first yoke and a further first yoke, respectively The magnet and the other magnet. The laser projection system of claim 34, wherein the magnetic control module and the other magnetic control module respectively have a second yoke and a second magnet, respectively a magnet and the other magnet; wherein the magnet is located between the first yoke and the second yoke, and the other magnet is located at the other first yoke and the other second yoke between. The laser projection system of claim 31, wherein the laser speckle elimination device further comprises a body, and the base has a receiving groove for receiving the asymmetric body. The laser projection system of claim 36, wherein the corresponding side of the second body has a fixing groove and a fixing groove for respectively fixing the magnet and the other magnet . The laser projection system of claim 31, wherein the asymmetric main system changes a centroid position of the carrying portion, changes an elastic center position of the suspension module, and changes the magnetic control module. An asymmetry characteristic is achieved with at least one of the electromagnetic force center positions of the other of the magnetron modules. The laser projection system of claim 24, wherein the suspension module comprises at least two elastic bodies and a power supply circuit board, and the two ends of each of the elastic bodies are respectively connected to the laser projection system. The power supply circuit board and the carrying portion are configured to suspend the carrying portion on the power supply circuit board. The laser projection system of claim 39, wherein at least one of the elastic bodies is made of a material different from the other elastomers, or It is said that at least one of the elastomers has a different size from the other elastomers, or at least two of the elastomers are asymmetrically disposed. The laser projection system of claim 24, wherein the carrying portion is in the shape of a rectangular parallelepiped, and the side of the carrying portion is located on one of the short sides of the rectangular parallelepiped, or is the carrying portion The side is located on one of the long sides of the cuboid. The laser projection system of claim 24, wherein the curve motion is a super-curve motion. The laser projection system of claim 24, wherein the curve motion is a circular arc motion or a non-closed curved motion. The laser projection system of claim 24 or 31, wherein the optical modulation means is a diffusion sheet, an optical diffraction element or a microlens array.