JP3097094U - Color wheel and motor used for it - Google Patents

Abstract

Provided is a color wheel and a color wheel motor that reduce vibration and noise and improve driving reliability by calibrating a rotational center of gravity.
A color wheel includes a motor body, a housing, and a color filter. The housing 12 is provided on one side of the motor body 11 in the axial direction. The color filter 13 is provided on the housing 12. A recess is formed in the side surface 121 of the housing 12. Calibration of the center of gravity of rotation can be performed by fitting or adhering a balance weight to this recess.
[Selection] Figure 2

Description

[0001]
[Technical field to which the invention belongs]
The present invention relates to a color wheel and a motor used therein, and more particularly, to a color wheel applied to a digital light source processor and a motor used therefor.
[0002]
[Prior art]
2. Description of the Related Art In recent years, digital light processing (DLP) has attracted attention as a new projection technology because it has advantages such as high luminance, correct color tone reproducibility, fast reaction time, no noise, and small size.
[0003]
The DLP projector uses digital control and uses the principle of reflected light. After concentrating the light source, it focuses on a translucent mirror and then passes through a color filter consisting of red, green and blue filters. It is projected on a digital micro-mirror device (DMD). The micromirror device is provided with many small movable mirrors.By driving the electrodes, the tilt angle and the deflection time of the movable mirror are controlled, and by switching the light reflection direction, the light is projected from the head of the mirror. Image.
[0004]
As shown in FIG. 1, a DLP type projector is usually provided with a color wheel 3 for generating colors. The color wheel 3 includes a cap 31, a color filter 32, and a motor 33. The cap 31 and the color filter 32 are fixed to a motor 33. The motor 33 mainly includes a housing 331 and a motor main body 332.
[0005]
[Problems to be solved by the invention]
However, a motor generally used for a color wheel has a rotation speed of 7200 rotations or more, so that the rotation center of gravity is separated from the axis of the rotation axis, that is, when the rotation center of gravity is not located on the axis of the rotation axis, The color wheels shake and produce noise, which affects driving reliability.
[0006]
The present invention has been made in view of the above-mentioned drawbacks, and an object of the present invention is to provide a color wheel and a color wheel motor that reduce vibration and noise and improve driving reliability by calibrating the center of gravity of rotation. And
[0007]
[Means for Solving the Problems]
In order to achieve the above object, a color wheel according to the present invention is a color wheel including a motor body, a housing provided on one side of the motor body in an axial direction, and a color filter provided on the housing. The side surface of the housing is a side surface in the rotation direction of the motor body, and has a recess formed thereon. The color wheel motor according to the present invention is a color wheel motor including a motor main body and a housing provided on one side of the motor main body in the axial direction, wherein a side surface of the housing is a motor main body. Is a side surface in the rotation direction of the above, and a concave portion is formed thereon.
[0008]
[Embodiment of the invention]
Hereinafter, a color wheel and a color wheel motor according to an embodiment of the present invention will be described in detail with reference to the drawings.
[0009]
As shown in FIG. 2, the color wheel 1 according to the present embodiment includes a motor main body 11, a housing 12, and a color filter 13. The housing 12 is provided on one side of the motor body 11 in the axial direction. The color filter 13 is provided on the housing 12. The side surface 121 of the housing 12 is a side surface in the rotation direction of the motor main body 11, and has a concave portion formed thereon.
[0010]
In the present embodiment, the motor main body 11 includes a magnet provided on the inner peripheral surface of an outer rotor (in the drawings, 11 denotes this rotor portion), a silicon steel plate on the inner stator side, and a coil (all (Not shown). When a current is applied to the coil, the silicon steel plate generates a magnetic force and a magnetic field, and the magnet acts on its orbiting magnetic field and rotates by regularly changing the magnetic field according to the sign and intensity of the passed current. The housing 12 is fixed to the outer rotor.
[0011]
As described above, the recess is formed on the side surface 121 of the housing 12. By forming this concave portion near the motor main body 11, a concave tank is formed between the housing 12 and the motor main body 11 (see FIG. 3). Similarly, the concave portion of the housing 12 can be formed near the color filter 13. Thereby, a concave tank is formed between the housing 12 and the color filter 13 (see FIG. 4). Here, the concave portion of the housing 12 is a ring-shaped or substantially ring-shaped concave portion.
[0012]
FIG. 5 is a perspective view showing the color wheel of FIG. 3, and FIG. 6 is an exploded perspective view of the color wheel of FIG.
[0013]
As shown in FIGS. 5 and 6, the color filter 13 is provided on the housing 12. The color filter 13 is fitted or adhered to the housing 12. Here, the color filter 13 is a circular filter composed of three color filters of red, green and blue. Of course, the color filter 13 may be a circular or ring-shaped filter composed of four color filters of red, green, blue and white. A cylindrical convex portion is provided on the mounting surface of the color filter 13 of the housing 12, and the center hole of the color filter 13 is fitted around the convex portion. Mated.
[0014]
As shown in FIG. 5, the cap 14 is fitted or adhered on the color filter 13 in order to increase the adhesion area between the color filter 13 and the housing 12. Further, the motor main body 11 is provided on the positioning member 15 as a shaft. A circuit is arranged on the positioning member 15 and is thereby connected to a driver (not shown). This driver is used to drive the motor main body 11, and the motor main body 11 rotates around a point where the positioning member 15 is provided on the motor main body 11 (the axis of the rotating shaft).
[0015]
After the color wheel 1 has been rotated for a while, the rotational center of gravity may be separated from the axis of the rotating shaft due to a positional shift due to long-term use. If the rotational center of gravity is not located at the axis of the rotating shaft, it will vibrate during rotation and generate noise, which will affect the reliability of operation.
[0016]
In the present embodiment, the center of rotation is calibrated using the balance weight. The counterweight may be any lump having weight. As a method of calibration, the balance weight is fitted into the recess of the housing 12, and the position of the balance weight in the recess is adjusted by device positioning based on the degree of shift of the center of gravity of rotation. Of course, the balance weight can also be fixed to the recess by an adhesive method.
[0017]
FIG. 7 shows a color wheel motor according to the present embodiment. As shown in FIG. 7, the color wheel motor 2 according to the present embodiment includes a motor main body 21 and a housing 22. The housing 22 is provided on one side of the motor body 21 in the axial direction. A side surface 221 of the housing 22 is a side surface in the rotation direction of the motor main body 21, and a concave portion 220 is formed thereon.
[0018]
The embodiment of the present invention has been described in detail with reference to the drawings. However, the specific configuration is not limited to this embodiment, and a design change or the like may be made without departing from the gist of the present invention. Anything is included in the present invention.
[0019]
[Effect of the invention]
The color wheel and the color wheel motor according to the present invention calibrate the center of gravity of rotation by adding a balance weight to the concave portion on the motor. Compared with the prior art, according to the present invention, since the counterweight can be fitted or adhered to the concave portion of the motor, the positioning of the counterweight is further facilitated. Furthermore, since the balance weight is installed in the concave portion, it does not protrude from the motor and does not collide, and the eccentric force can reduce the influence on the balance weight. In addition, since the center of gravity of the color wheel can be calibrated, vibration and noise of the color wheel are reduced, and driving reliability is improved.
[Brief description of the drawings]
FIG. 1 is a side view showing a conventional color wheel.
FIG. 2 is a side view showing a color wheel according to the embodiment.
FIG. 3 is a side view showing the color wheel according to the embodiment.
FIG. 4 is a side view showing the color wheel according to the embodiment.
FIG. 5 is a perspective view showing the color wheel of FIG. 3;
FIG. 6 is an exploded perspective view of the color wheel shown in FIG. 5;
FIG. 7 is a side view showing a color wheel motor according to the present embodiment.
[Explanation of symbols]
Reference Signs List 1 color wheel 11 motor body 12 housing 121 side surface 13 color filter 14 cap 15 positioning member 2 color wheel motor 21 motor body 22 housing 220 recess 221 side surface

Claims (7)

A motor body, a housing provided on one side in the axial direction of the motor body, and a color filter provided in the housing, a color wheel comprising:
A side surface of the housing is a side surface in a rotation direction of the motor body, and a concave portion is formed thereon. 2. The color wheel according to claim 1, wherein the recess of the housing is formed near the motor body, and a concave tank is formed between the housing and the motor body. 3. The color wheel according to claim 1, wherein the concave portion of the housing is formed near the color filter, and a concave tank is formed between the housing and the color filter. The color wheel according to claim 1, wherein the concave portion of the housing is a ring-shaped concave portion. A motor for a color wheel, comprising: a motor body; and a housing provided on one side of the motor body in the axial direction.
A color wheel motor, wherein a side surface of the housing is a side surface in a rotation direction of the motor body, and a concave portion is formed thereon. The color wheel motor according to claim 5, wherein the recess of the housing is formed near the motor main body, and a concave tank is formed between the housing and the motor main body. The color wheel motor according to claim 5, wherein the concave portion of the housing is a ring-shaped concave portion.

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