CN210514917U - Laser projection device - Google Patents

Abstract

The utility model discloses a laser projection device relates to laser projection technical field, for solving the colour wheel sensitivity of rotation not enough, influences the projection effect and invents. Laser projection arrangement includes the light source part, ray apparatus part and camera lens part, light source part or ray apparatus part include main casing body and colour wheel subassembly, the colour wheel subassembly sets up inside the main casing body, the colour wheel subassembly includes fixed bolster, colour wheel and sensor module, the colour wheel is used for receiving the light that the light source part sent, and produce different chromatic light, fixed bolster and main casing body coupling, the fixed bolster includes first mounting panel and second mounting panel, first mounting panel and second mounting panel mutually perpendicular and fixed connection, first mounting panel is used for installing the colour wheel, offer the incision that is used for installing sensor module on the second mounting panel, incision department is through preventing the reflection of light and is handled. The utility model discloses a laser projection device is used for laser projection.

Description

Laser projection device

Technical Field

The utility model relates to a laser projection technical field especially relates to a laser projection device.

Background

With the advent of the information age, projection display is increasingly favored by many people in terms of its fast and intuitive information transmission method, and among conventional projection technologies, DLP (Digital Light Processing) technology modulates image information by Light reflection, and the image modulated by the technology has high definition and uniform screen, so that the application of DLP technology in the field of large-size projection is increasingly widespread. The DLP technology uses a DMD (Digital micromirror Device) as an imaging Device, and controls the light source output by controlling the deflection angle of the DMD micromirror, and the DLP projection system can be divided into a monolithic system, a two-chip system and a three-chip system according to the different numbers of DMD chips, wherein the monolithic system is adopted by most DLP projection products due to its advantages of simple structure and low cost.

The single-chip DLP projection system realizes the display of color images by means of time sequence color mixing, wherein a color wheel is a core component for realizing the time sequence color mixing. The color mixing refers to a process of mixing three primary colors (red, green and blue) into other colors according to a certain proportion, the sequential color mixing is to respectively project the three primary colors to the same position according to the sequence, the rotation time of the three primary colors is less than the visual persistence time (0.1s) of human eyes, and the human eyes can feel color pictures. The color wheel is an original including three primary colors or more color blocks, which are arranged at the focus of a light source, each block is defined to be a specific color by the color wheel through a coating film, all the blocks form a disc, then the disc is driven by an internal motor to rotate at a fixed frequency, and different color lights which are alternated and continuous are generated through the rapid rotation of the disc of the color wheel.

In the prior art, a color wheel is generally mounted on a projection device through a fixing support, a notch is formed in the fixing support, a sensor is mounted at the notch, a black mark surface is arranged on the surface of the color wheel, when a motor rotates, the sensor emits infrared light to the surface of the color wheel and receives reflected light reflected by the surface of the color wheel, when the color wheel rotates to the black mark surface, the infrared light irradiates on the black mark surface, the infrared light is absorbed by the black mark surface, and at the moment, the sensor cannot receive the reflected light. The motor rotates at a fixed rotating speed, so that the time of one rotation of the color wheel is unchanged, the position of each color block can be known through the rotating time, and the light source can be controlled to irradiate on the specific color block to obtain an image with a corresponding color.

The color wheel sensor comprises a reflection end and a receiving end, wherein the transmission end can transmit infrared light with the maximum wavelength of 950nm, and the receiving end can receive the infrared light with the wavelength range of 700nm-1200 nm. The color wheel is a component for mixing color of light emitted by the light source, and more stray light exists around the component, and part of the stray light inevitably irradiates the surface of the fixed support, and the surface of the fixed support is a metal rough surface generally, so that the light reflectivity is weak, and the work of the color wheel sensor cannot be interfered. However, the incision department at the installation sensor is the cross section, this cross section department is the metal bright surface, this metal bright surface can reflect stray light, stray light part after the reflection can be received by the sensor receiving terminal to can disturb the work of sensor, and then influence the perception of sensor, when the perception of sensor appears the difference, then can not the rotational position of accurate definite colour wheel, consequently, lead to the colour wheel pivoted sensitivity not enough, can not accurate projection out needs the image of colour, thereby lead to the projection effect to reduce.

SUMMERY OF THE UTILITY MODEL

An embodiment of the utility model provides a laser projection device can improve colour wheel pivoted sensitivity to improve the projection effect.

In order to achieve the above object, the embodiments of the present invention adopt the following technical solutions:

the embodiment of the utility model provides a laser projection device, including light source part, ray apparatus part and lens part, the light source part is used for providing the light beam for the ray apparatus part, the ray apparatus part is used for incidenting the light beam to the lens part, the light source part or the ray apparatus part includes main casing body and colour wheel subassembly, the colour wheel subassembly sets up in the main casing body is inside, the colour wheel subassembly includes fixed bolster, colour wheel and sensor module, the colour wheel is used for receiving the light that the light source part sent, and the output is different chromatic light, the fixed bolster with the main casing body coupling, the fixed bolster includes first mounting panel and second mounting panel, first mounting panel with second mounting panel mutually perpendicular and fixed connection, first mounting panel is used for installing the colour wheel, offer the incision that is used for installing the sensor module on the second mounting panel, and the cut is subjected to anti-reflection treatment.

The embodiment of the utility model provides a laser projection device, because the incision department at installation sensor subassembly has been done and has been prevented the reflection-light processing, guarantee that the light that the sensor sent and the reverberation of returning by the colour wheel surface reflection can not take place the refraction on the tangent plane of incision department, thereby ensure that the light that the sensor sent and the reverberation of returning can not take place the refraction in tangent plane department, make the sensor can accurately receive the reverberation, improve the degree of accuracy of sensor subassembly perception, thereby confirm the rotational position of colour wheel, make the light source can accurately shine on the block that corresponds the colour, projection arrangement's projection effect has been improved.

Drawings

Fig. 1 is a schematic structural diagram of a projection apparatus according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a main housing and a color wheel assembly of an optical-mechanical part according to an embodiment of the present invention;

fig. 3 is a schematic structural diagram of the color wheel assembly mounted on the main housing of the optical-mechanical part according to the embodiment of the present invention;

fig. 4 is a front view of the color wheel fixing bracket according to the embodiment of the present invention;

FIG. 5 is a rear view of FIG. 1;

fig. 6 is a schematic structural diagram of a color wheel fixing bracket and a sensor assembly according to an embodiment of the present invention;

fig. 7 is a schematic structural diagram of a sensor assembly mounted on the color wheel fixing bracket according to an embodiment of the present invention;

fig. 8 is a front view of the color wheel fixing bracket according to the embodiment of the present invention after bending the notch edge;

FIG. 9 is a rear view of FIG. 8;

fig. 10 is a schematic structural view of a color wheel fixing bracket and a sensor assembly with a bent notch edge according to an embodiment of the present invention;

fig. 11 is a schematic structural diagram of a sensor assembly mounted on a color wheel fixing bracket with a bent notch edge according to an embodiment of the present invention;

fig. 12 is a schematic structural diagram of a sensor assembly according to an embodiment of the present invention;

fig. 13 is a schematic structural diagram of a color wheel according to an embodiment of the present invention;

fig. 14 is a schematic structural diagram of a color wheel assembly according to an embodiment of the present invention;

fig. 15 is an exploded schematic view of the color wheel assembly according to the embodiment of the present invention.

Reference numerals: 1. fixing a bracket; 2. a first mounting plate; 3. a second mounting plate; 4. cutting; 5. cutting into noodles; 6. a first connecting plate; 7. a color wheel; 8. a marking region; 9. a sensor assembly; 10. a sensor; 11. a PCB board; 12. a color wheel assembly; 13. a light source section; 14. an opto-mechanical section; 15. a lens portion; 16. a main housing; 17. a first edge; 18. a second edge; 19. a second connecting plate.

Detailed Description

The following describes a laser projection apparatus according to an embodiment of the present invention in detail with reference to the accompanying drawings.

In the description of the present invention, it is to be understood that the terms "center", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positional relationships based on those shown in the drawings, and are merely for convenience of description and simplicity of description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore, are not to be construed as limiting the present invention.

The terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

The embodiment of the present invention provides a laser projection device, as shown in fig. 1, including a light source portion 13, an optical machine portion 14 and a lens portion 15, where the light source portion 13 is used to provide an illumination beam for the optical machine portion 14, the optical machine portion 14 is used to inject the illumination beam into the lens portion 15, the lens portion 15 is used to form an image, as shown in fig. 1 and fig. 2, the light source portion 13 or the optical machine portion 14 includes a main housing 16 and a color wheel assembly 12, as shown in fig. 3, the color wheel assembly 12 is disposed inside the main housing 16, as shown in fig. 1, fig. 2 and fig. 14, the color wheel assembly 12 includes a fixing bracket 1, a color wheel 7 and a sensor assembly 9, the color wheel 7 is used to receive the light emitted by the light source portion 13 and generate different color lights, the fixing bracket 1 is connected to the main housing 16, as shown in fig. 4 and 5, the fixing bracket 1 includes a first mounting plate 2 and a second mounting plate 3, the first mounting plate 2 is perpendicular to the second mounting plate 3 and is fixedly connected to the second mounting plate 3, as shown in fig. 15, the first mounting plate 2 is used for mounting the color wheel 7, the second mounting plate 3 is provided with a notch 4 for mounting the sensor assembly 9, and the notch 4 is subjected to anti-reflection processing.

The embodiment of the utility model provides a laser projection device, because the department has been done at incision 4 of installation sensor subassembly 9 and has been prevented the reflection-type treatment, guarantee the light that sensor subassembly 9 sent and the reverberation of being reflected by colour wheel 7 surface reflection back can not take place the refraction on tangent plane 5 of incision 4 department, thereby ensure that the light that sensor subassembly 9 sent and the reverberation of being reflected back can not take place the refraction in tangent plane 5 department, make sensor subassembly 9 can accurately receive the reverberation, improve the degree of accuracy of sensor subassembly 9 perception, thereby confirm colour wheel 7's rotating position, make the light source can accurately shine on the block that corresponds the colour, projection arrangement's projection effect has been improved.

The embodiment of the utility model provides a color wheel 7 can be for set up in ray apparatus part 13 strain the color wheel, perhaps color wheel 7 for set up in light source part 14's fluorescence wheel.

Preferably, the surface of the color wheel 7 is provided with a marking area 8, as shown in fig. 13 and 14, and the marking area 8 is used for absorbing the light emitted by the sensor assembly 9. When the reflected light emitted by the sensor assembly 9 irradiates the mark area 8 on the surface of the color wheel 7, the light is absorbed by the mark area 8, so that the sensor assembly cannot receive the reflected light, and the rotating speed of the color wheel 7 is unchanged, so that the time of one rotation of the color wheel is unchanged, and the sensor assembly 9 can know the rotating position of the color wheel 7 according to the rotating time, thereby controlling the area irradiated by the light source to obtain the image with the corresponding color.

Preferably, as shown in fig. 12 and 14, the sensor assembly 9 includes a sensor 10 body and a PCB 11, the PCB 11 is mounted on the second mounting plate 3, the PCB 11 and the first mounting plate 2 are respectively disposed on two sides of the second mounting plate 3, and the sensor 10 is mounted on the PCB 11 and disposed at the notch 4. Install PCB board 11 on the face of second mounting panel 3, install sensor 10 on PCB board 11 again, guarantee that the light that sensor 10 sent can penetrate the color wheel 7 surface directly, can not take place the slope.

In order to facilitate the installation of the sensor assembly 9, as shown in fig. 4-7, the notch 4 is opened at the edge of the second mounting plate 3, and a first edge 17 of the second mounting plate 3, on which the notch 4 is opened, is disposed opposite to a second edge 18 of the second mounting plate 3, which is connected to the first mounting plate 2. The notch 4 is formed in the first edge 17 of the second mounting plate 3, and compared with the mode that a through hole is formed in the plate surface of the second mounting plate 3, the process is simpler and the processing is convenient; meanwhile, as shown in fig. 15, the sensor assembly 9 mounted on the second mounting plate 3 needs to emit infrared rays to the color wheel 7 mounted on the first mounting plate 2, and the infrared light is reflected by the surface of the color wheel 7, again received by the sensor assembly 9, thereby detecting the rotational position of the color wheel 7, since light reflection along the original path requires the light source to be vertically directed onto the reflecting surface at an angle of 90 °, if the light is obliquely directed onto the reflecting surface, the light will reflect the light rays at the same oblique angle, as a result, the infrared light emitted by the sensor assembly 9 must impinge perpendicularly on the surface of the color wheel 7, i.e. the sensor assembly 9 needs to be positioned directly above the color wheel 7, if the cut-out 4 is made on the edge adjacent to the second edge 18, it is necessary to extend the cut in a direction parallel to the second edge 18 to just above the color wheel 7, which increases the number of manufacturing steps and makes it inconvenient to machine parts. When the notch 4 and the first mounting plate 2 are respectively arranged at the first edge 17 and the second edge 18 which are opposite to each other on the second mounting plate 3, the notch 4 is only required to be arranged at a position corresponding to the mounting position of the color wheel 7 below, as shown in fig. 6, 7 and 15, the structure of the notch 4 is not required to be changed, the processing is more convenient, and the structure is more reasonable.

The embodiment of the present invention provides that the anti-reflective treatment is to spray black paint on the tangent plane 5 of the cut 4, as shown in fig. 5 and 6. The black coating is sprayed on the tangent plane 5 of the notch 4, and the process can be completed without complex and tedious process operation, and is simple and practical.

Furthermore, as shown in fig. 8 and 9, the anti-reflection treatment is performed by bending the cut 4, so that the section 5 of the cut 4 avoids the light emitted from the sensor assembly. As shown in fig. 10 and 11, the edge of the notch 4 is bent, so that the section 5 of the notch 4 avoids the light emitted from the sensor assembly 9, and the light is prevented from being refracted at the section 5.

In order to make the installation of the sensor assembly 9 at the notch 4 more stable, as shown in fig. 8 and 9, the cut surface 5 of the notch 4 faces the side where the first mounting plate 2 is arranged. As shown in fig. 15, since the light emitted from the sensor assembly 9 must be directed at the surface of the color wheel 7 to receive the reflected light, if the light is inclined, the reflected light is also refracted at an angle, so that the sensor assembly 9 cannot receive the reflected light. Therefore, when bending the notch 4 to the side without the first mounting plate 2, the sensor assembly 9 needs to be abutted on the bent portion when being installed, and the uneven area on the bent portion can influence the sensor assembly 9 to receive reflected light, so that the edge of the notch 4 is bent to the side provided with the first mounting plate 2, when the sensor assembly 9 is installed, the mounting plate of the sensor assembly 9 only needs to be abutted on the plate surface of the second mounting plate 3, and thus the light emitted by the sensor assembly 9 is ensured to be directly irradiated on the surface of the color wheel 7.

To ensure the accuracy of the perception of the sensor assembly 9, the bending angle of the edge of the cut-out 4 is greater than or equal to 90 °, as shown in fig. 10 and 11. When the edge bending angle of the notch 4 is smaller than 90 degrees, the section 5 of the notch 4 is still opposite to the light emitted by the sensor assembly 9, only a certain included angle is formed, and at the moment, the reflected light still refracts at the section 5 of the notch 4 to influence the sensor assembly 9 to receive the reflected light; when the edge bending angle of the notch 4 is equal to 90 degrees, the section 5 of the notch 4 is perpendicular to the light of the sensor assembly 9, and the light cannot irradiate the section 5 and cannot be refracted; when the edge bending angle of the notch 4 is larger than 90 degrees, the section 5 of the notch 4 is opposite to the light, and the light can not irradiate on the section 5. Thereby ensuring that the sensor assembly 9 accurately receives the reflected light.

Preferably, as shown in fig. 4 and 8, a first connecting plate 6 is disposed on the first mounting plate 2, a second connecting plate 19 is disposed on the second mounting plate 3, the first connecting plate 6 and the second mounting plate 3 are respectively disposed on opposite edges of the first mounting plate 2, the first mounting plate 2 and the first connecting plate 6 are disposed perpendicular to each other, and the first connecting plate 6 and the second mounting plate 3 are respectively disposed on two sides of the first mounting plate 2; the second connecting plate 19 and the first mounting plate 2 are respectively arranged on adjacent edges of the second mounting plate 3, the second connecting plate 19 and the first connecting plate 6 are arranged in parallel, and the second connecting plate 19 extends in a direction away from the second mounting plate 3; the first connecting plate 6 and the second connecting plate 19 are used for connecting with a projection device. The color wheel fixing bracket provided by the embodiment of the present invention is more conveniently connected to the projection device through the first connecting plate 6 and the second connecting plate 19, specifically, as shown in fig. 15, the first connecting plate 6 is perpendicular to the first mounting plate 2 and is respectively disposed on both sides of the first mounting plate 2 with the second mounting plate 3, when the color wheel 7 is mounted on the first mounting plate 2, the connection and fixation between the first connecting plate 6 and the projection device are not affected, the second connecting plate 19 and the first mounting plate 2 are respectively disposed on two adjacent edges of the second mounting plate 3, so that the second connecting plate 19 does not affect the opening position of the notch 4 on the second mounting plate 3, the second connecting plate 19 is parallel to the first connecting plate 6 and extends in a direction away from the second mounting plate 3, that is, after the color wheel 7 and the sensor assembly 9 are mounted, the connection and fixation between the second connecting plate 19 and the projection device are not affected, so that the connection between the color wheel fixing support and the projection device is simpler and more convenient.

Furthermore, the anti-reflection treatment in the embodiment of the present invention can also avoid the reflection light of the sensor assembly 9 from being refracted by pasting the black adhesive tape, setting the black shading cloth, and the like on the tangent plane 5 of the notch 4.

In the description herein, particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims (10)

1. A laser projection device comprises a light source part, an optical machine part and a lens part, wherein the light source part is used for providing a lighting beam for the optical machine part, the optical machine part is used for enabling the lighting beam to be incident to the lens part, the lens part is used for imaging, the light source part or the optical machine part comprises a main shell and a color wheel component, and the laser projection device is characterized in that the color wheel component is arranged inside the main shell and comprises a fixed support, a color wheel and a sensor component, the color wheel is used for receiving light rays emitted by the light source part and outputting different color light, the fixed support is connected with the main shell and comprises a first mounting plate and a second mounting plate, the first mounting plate and the second mounting plate are perpendicular to each other and are fixedly connected, the first mounting plate is used for mounting the color wheel, and a notch for installing the sensor assembly is formed in the second installation plate, and anti-reflection treatment is carried out at the notch.

2. The laser projection apparatus as claimed in claim 1, wherein the color wheel is a color filter wheel disposed in the optical engine portion, or the color wheel is a fluorescent wheel disposed in the light source portion.

3. The laser projection device as claimed in claim 1, wherein the color wheel has a surface provided with a marking region for absorbing light emitted from the sensor assembly.

4. The laser projection device as claimed in claim 3, wherein the sensor assembly includes a sensor body and a PCB board, the PCB board is mounted on the second mounting board, the PCB board and the first mounting board are respectively disposed at two sides of the second mounting board, and the sensor is mounted on the PCB board and disposed at the notch.

5. The laser projection device as claimed in claim 1, wherein the notch is formed at an edge of the second mounting plate, and a first edge of the second mounting plate, at which the notch is formed, is opposite to a second edge of the second mounting plate, at which the second mounting plate is connected to the first mounting plate.

6. The laser projection device of claim 1, wherein the anti-reflective treatment is a black paint sprayed on the cut surface of the cut.

7. The laser projection device as claimed in claim 1, wherein the anti-reflection treatment is a bending treatment at the cut so that a cut surface of the cut is away from the light emitted from the sensor assembly.

8. The laser projection device of claim 7, wherein a cut-out of the cutout is oriented toward a side on which the first mounting plate is disposed.

9. The laser projection device of claim 8, wherein the bend angle at the cut is greater than or equal to 90 °.

10. The laser projection device as claimed in any one of claims 1 to 9, wherein a first connecting plate is disposed on the first mounting plate, a second connecting plate is disposed on the second mounting plate, the first connecting plate and the second mounting plate are disposed on opposite edges of the first mounting plate, respectively, the first mounting plate and the first connecting plate are disposed perpendicular to each other, and the first connecting plate and the second mounting plate are disposed on both sides of the first mounting plate, respectively; the second connecting plate and the first mounting plate are respectively arranged on the adjacent edges of the second mounting plate, the second connecting plate and the first connecting plate are arranged in parallel, and the second connecting plate extends in the direction far away from the second mounting plate; the first connecting plate and the second connecting plate are used for being connected with a projection device.

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