JP2016066061A - Phosphor wheel device, phosphor wheel device storage housing, and projection-type image display device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a phosphor wheel device capable of efficiently cooling a phosphor wheel.SOLUTION: The phosphor wheel device includes: a phosphor wheel; a motor; and plural blades. The phosphor wheel has a disk-like base plate and a fluorescent body which is disposed on one plane of the base plate in a circumferential direction. The motor drives to rotate the phosphor wheel. The plural blades are fixed to the other plane of the base plate to rotate integrally with the phosphor wheel and extend from the rotation axis of the motor in a radial direction of the phosphor wheel.SELECTED DRAWING: Figure 1C

Description

  The present disclosure relates to a phosphor wheel device used in a projection image display device, a phosphor wheel device housing case that houses the phosphor wheel device, and a projection image display device including the phosphor wheel device.

  Patent document 1 discloses an illuminating device. In this illumination device, a rotary optical filter that integrates a cooling fan for cooling the heat generated in the color filter is used. In this optical filter, the cooling fan rotates together with the color filter, and the color filter is cooled by the air flow created by the cooling fan.

JP 2003-156996 A

  The present disclosure provides a phosphor wheel device, a phosphor wheel device housing, and a projection display device that can effectively dissipate heat generated in the phosphor wheel.

  The phosphor wheel device according to the present disclosure includes a phosphor wheel, a motor, and a plurality of blades. The phosphor wheel has a disk-shaped substrate and a phosphor disposed on one surface of the substrate in the circumferential direction. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor.

  The phosphor wheel device housing case in the present disclosure has a heat exchange element, and encloses and houses the phosphor wheel device described above.

  A projection display apparatus according to the present disclosure includes the above-described phosphor wheel device, the above-described phosphor wheel device housing, an excitation light source that generates excitation light that excites the phosphor, and a phosphor based on an image signal. A light modulation element that modulates light emission to generate image light.

  The phosphor wheel device according to the present disclosure is effective for efficiently cooling the heat generated in the phosphor.

1A is a plan view showing a front surface of the phosphor wheel device according to Embodiment 1. FIG. 1B is a side view of the phosphor wheel device according to Embodiment 1. FIG. FIG. 1C is a plan view showing the back surface of the phosphor wheel device according to the first exemplary embodiment. FIG. 2A is a perspective view showing a front surface of the phosphor wheel device according to the first exemplary embodiment. 2B is a perspective view showing the back surface of the phosphor wheel device according to Embodiment 1. FIG. FIG. 3A is a side view of a fan member provided in the phosphor wheel device according to the first exemplary embodiment. FIG. 3B is a plan view of a fan member provided in the phosphor wheel device according to Embodiment 1. FIG. 3C is a perspective view of a fan member included in the phosphor wheel device according to the first exemplary embodiment. FIG. 4 is a diagram schematically showing an example of the first structure of the phosphor wheel device according to the first exemplary embodiment. FIG. 5 is a diagram schematically showing an example of the second structure of the phosphor wheel device according to the first exemplary embodiment. FIG. 6 is a diagram schematically illustrating an example of a third structure of the phosphor wheel device according to the first exemplary embodiment. FIG. 7A is a plan view showing a front surface of the phosphor wheel device according to the second exemplary embodiment. FIG. 7B is a side view of the phosphor wheel device according to the second exemplary embodiment. FIG. 7C is a plan view showing the back surface of the phosphor wheel device according to the second exemplary embodiment. FIG. 8A is a perspective view illustrating a front surface of the phosphor wheel device according to the second exemplary embodiment. FIG. 8B is a perspective view showing the back surface of the phosphor wheel device according to the second exemplary embodiment. FIG. 9A is a plan view showing a back surface of a fan member provided in the phosphor wheel device according to the second exemplary embodiment. FIG. 9B is a side view of a fan member provided in the phosphor wheel device according to the second exemplary embodiment. FIG. 9C is a plan view showing a front surface of a fan member included in the phosphor wheel device according to Embodiment 2. FIG. 10 is a perspective view of a fan member included in the phosphor wheel device according to the second exemplary embodiment. FIG. 11A is a perspective view showing a front surface of the phosphor wheel device according to the third exemplary embodiment. FIG. 11B is a perspective view showing the back surface of the phosphor wheel device according to the third exemplary embodiment. FIG. 12 is a cross-sectional view of the phosphor wheel device housing according to the fourth embodiment. FIG. 13 is a diagram schematically illustrating an air flow generated in the phosphor wheel device housing according to the fourth embodiment. FIG. 14 is a cross-sectional view showing another example of the phosphor wheel device housing case according to the fourth embodiment. FIG. 15 is a cross-sectional view of the phosphor wheel device housing according to the fifth embodiment. FIG. 16 is a diagram schematically illustrating a configuration example of the projection display apparatus according to the sixth embodiment. FIG. 17 is a diagram schematically illustrating another configuration example of the projection display apparatus according to the sixth embodiment. FIG. 18 is a diagram schematically illustrating a configuration example of the projection display apparatus according to the seventh embodiment. FIG. 19 is a plan view showing a surface on which the phosphor of the phosphor wheel device included in the projection display apparatus according to Embodiment 7 is formed.

  Hereinafter, embodiments will be described in detail with reference to the drawings as appropriate. However, more detailed description than necessary may be omitted. For example, detailed descriptions of already well-known matters and repeated descriptions for substantially the same configuration may be omitted. This is to avoid the following description from becoming unnecessarily redundant and to facilitate understanding by those skilled in the art.

  The accompanying drawings and the following description are provided to enable those skilled in the art to fully understand the present disclosure, and are not intended to limit the subject matter described in the claims.

  In the description, the same symbols, symbols, and numbers indicate the same components unless otherwise specified. Further, unless otherwise specified, components that are not essential to the present invention are not illustrated.

  In the following, the phosphor wheel device will be described in the first to third embodiments, and the housing for housing the phosphor wheel device in the fourth and fifth embodiments (hereinafter referred to as “phosphor wheel device housing housing”, or In the sixth and seventh embodiments, the projection display apparatus will be described.

  Moreover, although the following embodiment shows an example in which the excitation light is blue light B, the excitation light may be light of other wavelengths.

(Embodiment 1)
Hereinafter, the phosphor wheel device 100 according to the first embodiment will be described with reference to FIGS. 1A to 3C.
[1-1. Constitution]
FIG. 1A is a plan view showing a front surface of phosphor wheel device 100 according to the first exemplary embodiment. FIG. 1B is a side view of phosphor wheel device 100 in the first exemplary embodiment. FIG. 1C is a plan view showing the back surface of phosphor wheel device 100 in the first exemplary embodiment.

  FIG. 2A is a perspective view showing a front surface of phosphor wheel device 100 in the first exemplary embodiment. FIG. 2B is a perspective view showing the back surface of phosphor wheel device 100 in the first exemplary embodiment.

  FIG. 3A is a side view of fan member 210 provided in phosphor wheel device 100 in the first exemplary embodiment. FIG. 3B is a plan view of fan member 210 provided in phosphor wheel device 100 in the first exemplary embodiment. FIG. 3C is a perspective view of fan member 210 provided in phosphor wheel device 100 in the first exemplary embodiment.

  The phosphor wheel device 100 includes a phosphor wheel 103. The phosphor wheel 103 includes a disk-shaped substrate 101 made of a heat conductive material, and a phosphor 102 disposed in the vicinity of the outer periphery of the substrate 101 along the circumferential direction with a substantially constant width. .

  The phosphor 102 is arranged in an annular shape having a predetermined width (for example, about 5 mm) on a circumference of one surface of the substrate 101 that is separated from the center O of the substrate 101 by a predetermined distance (for example, about 3 cm). It is installed. Note that in this embodiment, for convenience, one surface of the substrate 101 is a front surface. The phosphor 102 is made of, for example, a phosphor material that emits yellow light Ye. For example, the phosphor 102 is mixed with a thermosetting resin, and the mixture is applied to the front surface of the substrate 101 in an annular shape by screen printing, and then heated and cured in a heating furnace. Can be formed. The numerical values described above are merely examples, and the present disclosure is not limited to these numerical values. The above-described manufacturing method is merely an example.

  For example, an aluminum material or a sapphire glass material can be used as the heat conductive material constituting the substrate 101. However, the present disclosure is not limited to this configuration. The heat conductive material which comprises the board | substrate 101 should just be a material with favorable heat conductivity, and the process as a board | substrate being easy.

  A motor 104 for rotating the substrate 101 is attached to the phosphor wheel 103. The motor 104 is, for example, a spindle motor, but the present disclosure does not limit the type of the motor 104.

  As shown in FIG. 2B, the rotor 104a of the motor 104 is attached to the other surface of the substrate 101 (the back surface of the surface on which the phosphor 102 is disposed), and a support member (not shown) that supports the phosphor wheel device 100. ) To which the stator 104b of the motor 104 is attached. Note that in this embodiment, for convenience, the other surface of the substrate 101 is a back surface. In the motor 104, the rotor 104a is rotationally driven by supplying a driving voltage to the stator 104b through the flexible substrate 105.

  As shown in FIG. 1C and FIG. 2B, a fan member 210 in which a plurality of blades 211 are formed by bending a stainless steel sheet is attached to the back surface of the substrate 101.

  As shown in FIGS. 1A to 3C, the blade 211 is formed by cutting and raising a stainless steel sheet so that the fan member 210 is substantially perpendicular to the substrate 101 when the fan member 210 is attached to the substrate 101. . Further, when the fan member 210 is attached to the substrate 101, the blade 211 has a predetermined inclination (for example, 30 degrees) with respect to the radial direction of the phosphor wheel 103 from the center O of the substrate 101 (the rotation axis of the motor 104). It is formed at substantially equal intervals so as to extend in a straight line while being held and to be located on the inner side (center O side) than the arrangement position of the phosphor 102. The fan member 210 is formed such that when the fan member 210 is attached to the substrate 101, the distance from the blade 211 to the phosphor 102 is equal to or greater than the height of the blade 211 (for example, 5 mm). In addition, said numerical value is only an example and this indication is not limited to these numerical values at all.

  The fan member 210 is provided with a screw hole 213 corresponding to the screw hole 106 of the substrate 101, and an opening 212 corresponding to the rotor 104 a of the motor 104 is provided in the center of the fan member 210.

  The rotor 104 a of the motor 104 is fitted into the opening 212 of the fan member 210. The fan member 210 is screwed into a screw hole 213 of the fan member 210 by a screw (not shown) inserted into the screw hole 106 from the front (front) surface side of the substrate 101. Fixed to. Further, the rotor 104a of the motor 104 is also screwed and fixed to the substrate 101 by this screw. That is, the fan member 210 and the rotor 104a of the motor 104 are fastened together and fixed to the substrate 101 by screws that fasten the screw holes 106 and the screw holes 213.

  As described above, the fan member 210 is attached to the substrate 101 so as to rotate integrally with the phosphor wheel 103. Therefore, when the phosphor wheel 103 is rotationally driven by the motor 104, the plurality of blades 211 also rotate in the circumferential direction of the phosphor wheel 103 around the rotation axis of the motor 104. Thus, an air flow is generated by the plurality of blades 211.

  In the projection display apparatus, when the brightness of the excitation light output from the excitation light source is increased to increase the brightness of the display image, the phosphor irradiated with the excitation light becomes higher in temperature and the phosphor is deteriorated. Easy to progress. Further, when the temperature of the phosphor becomes high, the light emission rate decreases and the light emission luminance decreases. Also, the motor is likely to deteriorate at high temperatures. Therefore, it is desirable that the phosphor wheel in which the motor is integrated be used while being appropriately cooled.

  As described above, in the phosphor wheel 103 in the present embodiment, when the phosphor wheel 103 is rotationally driven by the motor 104, an air flow is generated by the plurality of blades 211. Therefore, the phosphor 102 heated by excitation light and the substrate 101 heated by the heat of the phosphor 102 are effectively cooled by the air flow generated by the rotation of the plurality of blades 211 together with the substrate 101. Can do.

  In the phosphor wheel device 100 according to the present embodiment, the stainless steel sheet metal is used for the fan member 210. Therefore, the fan member 210 can be formed with a thin material in a strong and inexpensive manner.

  The material of the fan member 210 is not limited to stainless steel. The fan member 210 may be formed of a steel plate or the like obtained by rust-proofing an iron plate.

[1-2. Construction]
Next, the structure of the phosphor wheel device 100 will be described with reference to FIGS.

  FIG. 4 is a diagram schematically showing an example of the first structure of phosphor wheel device 100 in the first exemplary embodiment.

  FIG. 5 is a diagram schematically showing an example of the second structure of phosphor wheel device 100 according to the first exemplary embodiment.

  FIG. 6 is a diagram schematically showing an example of the third structure of phosphor wheel device 100 in the first exemplary embodiment.

  In the following, description will be made using an XYZ orthogonal coordinate system for convenience. 4 to 6, the direction perpendicular to the back surface of the substrate 101 is defined as + Y direction, the radial direction of the substrate 101 is defined as + X direction, and the radial direction of the substrate 101 orthogonal to the X axis is defined as + Z direction.

  Hereinafter, the first structure (phosphor wheel device 100), the second structure (phosphor wheel device 100a), and the third structure (phosphor wheel device 100b) will be described in this order.

[1-2-1. First structure]
The substrate of the phosphor wheel device may be formed of a material that easily reflects light (reflective material).

  In the first structure shown in FIG. 4, the substrate 101 of the phosphor wheel device 100 is made of a reflective material such as aluminum.

  In addition, at least a region of the front surface of the substrate 101 where the phosphor 102 is disposed is processed (for example, mirrored) on the front surface to reflect the light emitted from the phosphor 102. Is formed. For example, the entire front surface of the substrate 101 may be mirror-finished.

  In the first structure, the blue excitation light B emitted from an excitation light source (not shown) is advanced in the + Y direction (from the bottom to the top in the drawing) as shown in FIG. To do. If the phosphor 102 is a red phosphor, the phosphor 102 irradiated with the excitation light B emits red light R. If the phosphor 102 is a green phosphor, the phosphor 102 irradiated with the excitation light B emits green light G. Some of the light emission (R, G) of these phosphors 102 is emitted from the phosphor 102 in the −Y direction (from the top to the bottom in the drawing). Further, another part of the light emission (R, G) of the phosphor 102 is emitted from the phosphor 102 in the + Y direction, reflected by the front surface of the substrate 101, and the front surface (front surface) of the substrate 101. ) From the surface in the -Y direction.

  Thus, in the first structure, the red light R and the green light G emitted from the phosphor wheel device 100 in the −Y direction can be obtained.

  In the phosphor wheel device 100, the distance L from the blade 211 to the phosphor 102 is set to be equal to or higher than the height H of the blade 211. This is due to the following reason. The air flow generated by the rotating blades 211 moves while gradually increasing the speed in the direction indicated by the solid arrow in the figure. In the phosphor wheel device 100, in order to cool the phosphor 102, it is required that an air flow having a sufficient speed is generated near the position where the phosphor 102 is disposed. However, it has been experimentally confirmed that if the blade 211 is too long, the air flow cannot obtain a sufficient speed near the position where the phosphor 102 is disposed, and a sufficient cooling effect cannot be obtained. On the other hand, by setting the distance L from the blades 211 to the phosphors 102 to be equal to or higher than the height H of the blades 211, the air flow increases during the distance L, and the vicinity of the position where the phosphors 102 are disposed. It has been confirmed by experiments that an air flow sufficient to cool the phosphor 102 is generated.

  For this reason, in the phosphor wheel device 100, the distance L from the blade 211 to the phosphor 102 is set to be equal to or higher than the height H of the blade 211, thereby realizing a sufficient cooling effect. . In the experiment, it was confirmed that a cooling effect of 50 ° C. to 80 ° C. can be obtained by providing the blade 211 on the phosphor wheel device 100 under the above-described conditions. However, this cooling effect varies depending on various conditions, and the present disclosure is not limited to these values.

[1-2-2. Second structure]
The substrate of the phosphor wheel device may be formed of a material that hardly reflects light (non-reflective material).

  In the second structure shown in FIG. 5, the substrate 101a of the phosphor wheel device 100a is made of a non-reflective material.

  However, in such a case, in the phosphor wheel device 100a, the surface of the substrate 101a where the phosphor 102 is disposed is processed to reflect light between the substrate 101a and the phosphor 102 (for example, It is assumed that the reflective film 300 that has been mirror-finished is provided by coating. That is, in the second structure, the reflective film 300 is provided on the substrate 101 a and the phosphor 102 is provided on the reflective film 300. Therefore, in the second structure, the phosphor wheel device 100a includes the phosphor wheel 103a including the substrate 101a, the reflective film 300, and the phosphor 102.

  In the second structure, similarly to the first structure, blue excitation light B emitted from an excitation light source (not shown) is advanced in the + Y direction to irradiate the phosphor 102. The phosphor 102 irradiated with the excitation light B emits a part of the emission (R, G) from the phosphor 102 in the −Y direction, and the other part of the emission (R, G) from the phosphor 102 + Y. Emits in the direction. The light emission (R, G) of the phosphor 102 traveling in the + Y direction is reflected by the front surface of the reflective film 300 provided on the substrate 101a, and is similar to the first structure shown in FIG. The light is emitted in the −Y direction from the front surface of 101a.

  Thus, in the second structure, as in the first structure, red light R and green light G emitted from the phosphor wheel device 100a in the −Y direction can be obtained.

  In the second structure, the reflective film 300 is provided on the substrate 101a so as to correspond to at least the region where the phosphor 102 is provided, but the surface of the substrate 101a on which the phosphor 102 is provided is provided. The reflective film 300 may be provided on the entire surface.

  Also in the phosphor wheel device 100a, the distance L from the blade 211 to the phosphor 102 is set to be equal to or higher than the height H of the blade 211, thereby realizing a sufficient cooling effect.

[1-2-3. Third structure]
The substrate of the phosphor wheel device may be formed of a material that transmits light (light transmitting material).

  In the third structure shown in FIG. 6, the substrate 101b of the phosphor wheel device 100b is made of a light transmitting material such as sapphire glass.

  In such a case, in the phosphor wheel device 100b, excitation light (for example, blue light B) is transmitted through the surface of the substrate 101b on which the phosphor 102 is disposed, and light emission (for example, green light G) of the phosphor 102 is transmitted. A dichroic film 400 having a characteristic of reflecting mixed light of red light R. (hereinafter referred to as yellow light Ye) is provided by coating. That is, in the third structure, the dichroic film 400 is provided on the substrate 101b, and the phosphor 102 is provided on the dichroic film 400. Therefore, in the third structure, the phosphor wheel device 100b includes the phosphor wheel 103b including the substrate 101b, the dichroic film 400, and the phosphor 102. In the following, an example in which excitation light is blue light B and phosphor 102 is formed of a phosphor material that emits yellow light Ye is shown.

  In the third structure, unlike the first and second structures, blue excitation light (blue light B) emitted from an excitation light source (not shown) is emitted in the −Y direction as shown in FIG. Proceed (from top to bottom in the drawing) and irradiate the phosphor 102 from the back side of the substrate 101b. The excitation light B passes through the substrate 101b and the dichroic film 400 and is irradiated to the phosphor 102, thereby exciting the phosphor 102.

  The phosphor 102 irradiated with the excitation light B emits a part of the emission (yellow light Ye) from the phosphor 102 in the −Y direction, and the other part of the emission (yellow light Ye) from the phosphor 102 + Y. Emits in the direction. The light emission (yellow light Ye) of the phosphor 102 traveling in the + Y direction is reflected by the dichroic film 400 provided on the substrate 101b and emitted from the front (front) surface of the substrate 101b in the -Y direction.

  A part of the excitation light (blue light B) passes through the phosphor 102 without being used for exciting the phosphor 102 and is emitted from the phosphor 102 in the −Y direction. As a result, the light emitted from the phosphor 102 becomes mixed light of the yellow light Ye and the blue light B, that is, white light W.

  Thus, in the third structure, white light W can be obtained as light emitted in the −Y direction from the phosphor wheel device 100b.

  Also in the phosphor wheel device 100b, the distance L from the blade 211 to the phosphor 102 is set to be equal to or higher than the height H of the blade 211, thereby realizing a sufficient cooling effect.

[1-3. Effect]
As described above, in the present embodiment, the phosphor wheel device includes the phosphor wheel, the motor, and the plurality of blades. The phosphor wheel includes a disk-shaped substrate and a phosphor disposed in a circumferential direction on one surface of the substrate. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor.

  In this phosphor wheel device, it is desirable that the blades are arranged on the other surface of the substrate so as to be located inside the phosphor arrangement position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  In this phosphor wheel device, a fan member having a plurality of blades may be fixedly provided on the other surface of the substrate.

  In this phosphor wheel device, the fan member may be formed by bending a metal plate.

  In this phosphor wheel device, at least a region of the one surface of the substrate where the phosphor is disposed may have a front surface that is processed so as to reflect light emitted from the phosphor.

  In this phosphor wheel device, the substrate may be formed of a heat conductive material.

  According to the present embodiment, a phosphor, a substrate, or the like that has been heated by excitation light and has risen in temperature can be effectively cooled by an air flow generated by the rotation of a plurality of blades together with the substrate.

  Each of the phosphor wheel devices 100, 100a, and 100b is an example of a phosphor wheel device. Each of the phosphor wheels 103, 103a, and 103b is an example of a phosphor wheel. The motor 104 is an example of a motor. The blade 211 is an example of a blade. Each of the substrates 101, 101a, and 101b is an example of a substrate. The phosphor 102 is an example of a phosphor. The fan member 210 is an example of a fan member. Stainless steel sheet metal is an example of a metal plate that forms a fan member. Each of aluminum and sapphire glass is an example of a thermally conductive material that forms a substrate. Aluminum is an example of a material whose surface can be processed so as to reflect the light emitted from the phosphor. The reflective film 300 is an example of a front surface that is processed so as to reflect the light emitted from the phosphor. Blue light B is an example of excitation light.

(Embodiment 2)
Hereinafter, the phosphor wheel device 120 according to the second embodiment will be described with reference to FIGS. 7A to 10.
[2-1. Constitution]
FIG. 7A is a plan view showing a front surface of phosphor wheel device 120 in the second exemplary embodiment. FIG. 7B is a side view of phosphor wheel device 120 in the second exemplary embodiment. FIG. 7C is a plan view showing the back surface of phosphor wheel device 120 in the second exemplary embodiment.

  FIG. 8A is a perspective view showing a front surface of phosphor wheel device 120 in the second exemplary embodiment. FIG. 8B is a perspective view showing the back surface of phosphor wheel device 120 in the second exemplary embodiment.

  FIG. 9A is a plan view showing the back surface of fan member 220 provided in phosphor wheel device 120 in the second exemplary embodiment. FIG. 9B is a side view of fan member 220 provided in phosphor wheel device 120 in the second exemplary embodiment. FIG. 9C is a plan view showing a front surface of fan member 220 provided in phosphor wheel device 120 in the second exemplary embodiment.

  FIG. 10 is a perspective view of fan member 220 provided in phosphor wheel device 120 in the second exemplary embodiment.

  In the second embodiment, the same components as those in the first embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the first embodiment, the fan member 210 in which the plurality of blades 211 are formed by bending a stainless steel sheet metal has been described. The phosphor wheel device 120 shown in the second embodiment is different from the phosphor wheel device 100 shown in the first embodiment in that a fan member 220 having a plurality of blades 221 is formed by cutting aluminum. There is in point. Except for this point, phosphor wheel device 120 in the second embodiment is substantially the same as phosphor wheel device 100, phosphor wheel device 100a, or phosphor wheel device 100b shown in the first embodiment. Since they are the same, redundant description is omitted.

  As shown in FIGS. 9A to 10, the plurality of blades 221 are integrally formed with the fan member 220.

  As shown in FIGS. 7A to 10, the blade 221 is formed to be substantially perpendicular to the substrate 101 when the fan member 220 is attached to the substrate 101. Further, the shape of the blade 221 is curved while having a predetermined inclination with respect to the radial direction of the phosphor wheel 103 from the center O (rotation axis of the motor 104) of the substrate when the fan member 220 is attached to the substrate 101. And is formed at substantially equal intervals so as to be located on the inner side (center O side) than the arrangement position of the phosphor 102. Further, the fan member 220 is formed such that the distance from the blade 221 to the phosphor 102 is equal to or higher than the height of the blade 221 when the fan member 220 is attached to the substrate 101.

  Note that the blade 221 may not be curved. For example, the blade 221 may have the same shape as the blade 211 shown in the first embodiment.

  The fan member 220 is provided with a screw hole 223 corresponding to the screw hole 106 of the substrate 101, and an opening 222 corresponding to the rotor 104 a of the motor 104 is provided in the center of the fan member 220.

  The rotor 104 a of the motor 104 is fitted into the opening 222 of the fan member 220. 7A to 8B, the fan member 220 is configured such that the screw hole 106 of the substrate 101 and the screw hole 223 of the fan member 220 are screwed with screws (not shown), so that the motor 104 It is fixed to the substrate 101 together with the rotor 104a.

  As described above, in the second embodiment, the fan member 220 is attached to the substrate 101 so as to rotate integrally with the phosphor wheel 103 as in the first embodiment. Therefore, when the phosphor wheel 103 is rotationally driven by the motor 104, the plurality of blades 221 also rotate in the circumferential direction of the phosphor wheel 103 around the rotation axis of the motor 104. Thus, an air flow is generated by the plurality of blades 221.

  Therefore, also in the present embodiment, the phosphor 102, the substrate 101, and the like that have been heated by the excitation light and have risen in temperature can be effectively cooled by the air flow generated by the rotation of the plurality of blades 221 together with the substrate 101. it can.

  In addition, although the process restrictions arise when pressing a metal plate, since the fan member 220 of the phosphor wheel device 120 is formed by cutting aluminum, in the present embodiment, such a fan member 220 is formed. The fan member 220 can be formed without being restricted by constraints. For example, since the wheel (portion contacting the substrate) and the fan (a plurality of blades) can be configured separately, they can be formed of aluminum having different properties. For example, a high-purity aluminum alloy having excellent thermal conductivity can be used for the wheel material, and an aluminum alloy having excellent workability and high rigidity can be used for the fan portion.

  In the second embodiment, the configuration example in which the fan member 220 is attached to the phosphor wheel 103 having the first structure shown in FIG. 4 in the first embodiment has been described. You may attach to the phosphor wheel 103a which has the 2nd structure shown, or the phosphor wheel 103b which has the 3rd structure shown in FIG.

[2-2. Effect]
As described above, in the present embodiment, the phosphor wheel device includes the phosphor wheel, the motor, and the plurality of blades. The phosphor wheel includes a disk-shaped substrate and a phosphor disposed in a circumferential direction on one surface of the substrate. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor.

  In this phosphor wheel device, it is desirable that the blades are arranged on the other surface of the substrate so as to be located inside the phosphor arrangement position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  Therefore, also in the present embodiment, the phosphor, the substrate, and the like that have been heated by the excitation light and have increased in temperature can be effectively cooled by the air flow generated by the rotation of the plurality of blades together with the substrate.

  The phosphor wheel device 120 is an example of the phosphor wheel device. The blade 221 formed integrally with the fan member 220 by cutting aluminum is an example of a blade.

(Embodiment 3)
Hereinafter, the phosphor wheel device 130 according to the third embodiment will be described with reference to FIGS. 11A and 11B.
[3-1. Constitution]
FIG. 11A is a perspective view showing a front surface of phosphor wheel device 130 according to the third exemplary embodiment. FIG. 11B is a perspective view showing the back surface of phosphor wheel device 130 in the third exemplary embodiment.

  In the third embodiment, the same components as those in the first embodiment or the second embodiment are denoted by the same reference numerals, and redundant description is omitted.

  In the first embodiment, the example in which the fan member 210 having the plurality of blades 211 is attached to the substrate 101 to configure the phosphor wheel device 100 has been described. In the second embodiment, the example in which the phosphor wheel device 120 is configured by attaching the fan member 220 having the plurality of blades 221 to the substrate 101 has been described. The phosphor wheel device 130 shown in the third embodiment is different from the phosphor wheel devices 100 and 120 shown in the first and second embodiments in that a plurality of blades 230 are integrally formed with the substrate 111 to form the substrate 111. There is in point. Except for this point, phosphor wheel device 130 in the third embodiment is substantially the same as phosphor wheel device 100, phosphor wheel device 100a, or phosphor wheel device 100b shown in the first embodiment. Since they are the same, redundant description is omitted.

  The phosphor wheel device 130 includes a disk-shaped substrate 111 made of a heat conductive material. A plurality of blades 230 are formed integrally with the substrate 111 on the back surface (the surface on which the motor 104 is attached) of the substrate 111. The board 111 is provided with a screw hole 223 for screwing the rotor 104a of the motor 104. The substrate 111 is formed together with the plurality of blades 230 by, for example, die casting using aluminum as a material. A phosphor 102 is formed on the front surface (surface on which the motor 104 is not attached) of the substrate 111 by the same method as in the first embodiment. Then, the rotor 104 a of the motor 104 is fixed to the substrate 101 by being screwed into the screw hole 223 of the substrate 111. In addition, since the shape of the blade | wing 230 is substantially the same as the blade | wing 221 demonstrated in Embodiment 2, duplication description is abbreviate | omitted.

  Also in the third embodiment, the blade 230 rotates integrally with the substrate 111 as in the first and second embodiments. Therefore, when the substrate 111 is rotationally driven by the motor 104, the plurality of blades 230 are similarly rotated, and an air flow is generated by the plurality of blades 230.

  Therefore, also in the present embodiment, the phosphor 102, the substrate 111, and the like that have been heated by the excitation light and increased in temperature can be effectively cooled by the air flow generated by the rotation of the plurality of blades 230 together with the substrate 111. it can.

  In the present embodiment, since the plurality of blades 230 are integrally formed with the substrate 111, it is not necessary to provide a fan member separately from the substrate.

  In addition, since the plurality of blades 230 are formed integrally with the substrate 111, the thermal conductivity from the substrate 111 to the blades 230 is higher than the configuration in which the fan member is attached to the substrate. Accordingly, in the substrate 111, the blades 230 themselves function as heat dissipation members. Therefore, in the present embodiment, phosphor wheel device 130 can be cooled more effectively.

  In addition, the manufacturing method of the board | substrate 111 is not limited to die-casting at all, For example, you may form by cold forging.

  In Embodiment 3, the substrate 111 has the first structure shown in FIG. 4 in Embodiment 1, but the second structure shown in FIG. 5 or the third structure shown in FIG. It may be.

[3-2. Effect]
As described above, in the present embodiment, the phosphor wheel device includes the phosphor wheel, the motor, and the plurality of blades. The phosphor wheel includes a disk-shaped substrate and a phosphor disposed in a circumferential direction on one surface of the substrate. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor.

  In this phosphor wheel device, it is desirable that the blades are arranged on the other surface of the substrate so as to be located inside the phosphor arrangement position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  In this phosphor wheel device, the plurality of blades and the substrate may be integrally formed.

  Also in the present embodiment, the phosphor, the substrate, and the like that have been heated by the excitation light and have risen in temperature can be effectively cooled by the air flow generated by the rotation of the plurality of blades together with the substrate.

  The phosphor wheel device 130 is an example of the phosphor wheel device. The substrate 111 is an example of a substrate. The blades 230 formed integrally with the substrate 111 by die casting using aluminum as a material are an example of the blades.

(Embodiment 4)
Hereinafter, the phosphor wheel device housing 500 according to the fourth embodiment will be described with reference to FIG.
[4-1. Constitution]
FIG. 12 is a sectional view of phosphor wheel device housing 500 according to the fourth embodiment. In the present embodiment, as shown in FIG. 12, for the sake of convenience, description will be made using an XYZ orthogonal coordinate system set in the same manner as in FIG.

  In the present embodiment, a configuration example in which the phosphor wheel device 100 described in the first embodiment is stored in the storage housing 500 will be described. However, the phosphor wheel device housed in the housing case 500 may be the phosphor wheel device 120 described in the second embodiment or the phosphor wheel device 130 described in the third embodiment.

  The phosphor wheel device 100 housed in the housing case 500 has the first structure shown in FIG. 4 in the first embodiment, but the phosphor wheel device having the second structure shown in FIG. 100a may be stored in the storage housing 500.

  In the fourth embodiment, the same constituent elements as those in the first to third embodiments are denoted by the same reference numerals, and redundant description is omitted.

  When the phosphor 102 formed in the phosphor wheel device 100 is excited by excitation light such as laser light to emit light, and the emitted light is used as a light source of an illumination device, when dust or the like adheres to the surface of the phosphor 102, There is a possibility that the dust is burned onto the phosphor 102 and the light emission luminance of the phosphor 102 is lowered. Therefore, it is desirable that the phosphor wheel device 100 be sealed in the housing case 500.

  The storage housing 500 includes a lid body 510 and a container body 520. The lid 510 and the container 520 are made of a material having excellent thermal conductivity, such as aluminum. That is, the housing case 500 is formed of a material having excellent thermal conductivity.

  The container body 520 is configured such that the phosphor wheel device 100 is accommodated therein and a lid 510 can be attached. By attaching the lid body 510 to the container body 520, the storage housing 500 has a flat rectangular parallelepiped shape. In addition, the container body 520 is supplied with excitation light at a position facing the phosphor 102 of the phosphor wheel device 100 housed in the housing case 500 and emits light emitted from the phosphor 102. The window portion 530 is opened. The first window portion 530 is formed in a shape that allows the first lens unit 540 to be fitted therein. The storage housing 500 is attached to, for example, a cabinet 600 of a projection display apparatus.

  The container body 520 to which the lid body 510 is attached is in a state in which the inside is sealed by fitting the first lens unit 540 into the first window portion 530. That is, the storage case 500 is a sealed case, and dust can be prevented from entering the storage case 500 from the outside.

  The first lens unit 540 includes a first lens 541 and a second lens 542 held by the lens holding frame 543. In the cabinet 600, an optical system is provided so that excitation light emitted from an excitation light source (not shown) is irradiated in the + Y direction (from the bottom to the top in the drawing) as shown by a one-dot chain line in FIG. Is set.

  Note that the distance between the first lens unit 540 and the phosphor 102 needs to be set based on the focal length of the first lens unit 540. For this reason, if the blade 211 is provided on the same surface as the surface on which the phosphor 102 is disposed in the phosphor wheel device, a design restriction such as limiting the height of the blade 211 occurs. However, in the phosphor wheel device 100, since the blades 211 are provided on the back surface of the surface on which the phosphor 102 is disposed, such a restriction does not occur, and the degree of freedom in design is relatively high. The same applies to other phosphor wheel devices shown in the present disclosure.

  The excitation light is condensed on the phosphor 102 formed on the substrate 101 of the phosphor wheel device 100 by the first lens 541 and the second lens 542. Then, the condensed excitation light is applied to the phosphor 102 to excite the phosphor 102. At this time, the phosphor 102 formed on the substrate 101 is heated by the condensed excitation light, and the temperatures of the phosphor 102 and the substrate 101 rise. In general, the phosphor 102 deteriorates as the temperature rises, and the light emission efficiency decreases. Therefore, it is desirable to cool the phosphor 102 to suppress them.

  The light emitted from the phosphor 102 excited by the excitation light is emitted in the −Y direction (from the top to the bottom in the drawing) through the second lens 542 and the first lens 541 as indicated by a one-dot chain line in FIG.

  A heat sink structure 580 having a plurality of fins 581 is provided on the inner surface side and the outer surface side of the lid 510. The heat sink structure 580 is an example of a heat exchange element. A heat sink structure 550 having a plurality of fins 551 is provided on the inner surface side and outer surface side of the side surface of the container body 520. The heat sink structure 550 is an example of a heat exchange element. As described above, the housing case 500 includes the heat sink structures 550 and 580 which are examples of heat exchange elements.

  The phosphor wheel device 100 is installed in the housing case 500 so that the substrate 101 rotates about the AA axis. When the phosphor wheel 103 is driven to rotate by the motor 104, the plurality of blades 211 rotate together with the substrate 101, and an air flow is generated in the storage housing 500 by the rotating blades 211.

  FIG. 13 is a diagram schematically showing an air flow generated in phosphor wheel device storage housing 500 in the fourth exemplary embodiment. In FIG. 13, the rotation direction of the phosphor wheel 103 and the rough flow of the air flow are indicated by arrows. In addition, in FIG. 13, the top view which looked at the phosphor wheel apparatus 100 from the back surface side is shown.

  As shown in FIG. 13, the air flow generated by the rotation of the plurality of blades 211 flows toward the heat sink structure 550 and flows along the surfaces of the plurality of fins 551 constituting the heat sink structure 550. The heat sink structure 550 is disposed at such a position. Although not shown, the same applies to the heat sink structure 580. Thereby, the heat of the air heated by the phosphor wheel 103 is conducted to the heat sink structures 550 and 580, and the heat sink structures 550 and 580 are heated. As described above, since the heat sink structures 550 and 580 are formed of a material having excellent thermal conductivity such as aluminum, heat exchange with the outside air is always performed through the fins 551 and 581. As a result, the heat sink structures 550 and 580 are cooled, and the air passing through the fins 551 and 581 is cooled. The air thus cooled returns to the phosphor wheel 103 again, whereby the phosphor wheel 103 is cooled.

  As shown in FIG. 12, cooling fans 610 may be provided in the vicinity of the side surfaces of the storage housing 500. The air generated by the cooling fan 610 cools the heat sink structures 550 and 580 as cooling air, so that the air inside the housing case 500 can be cooled more efficiently.

  As described above, in the housing case 500, the air heated by the heat generated when the phosphor 102 is irradiated with the excitation light becomes an air flow by the blades 211 of the fan member 210, and the air flow is the heat sink structure 550, 580. It flows along the surface. Thereby, the heat in the storage housing 500 is radiated to the outside through the heat sink structures 550 and 580.

  In the present embodiment, the heat sink structure 580 is integrally formed with the lid body 510 and the heat sink structure 550 is integrally formed with the container body 520. Therefore, it is not necessary to provide a heat sink separately from the housing case 500.

  Although FIG. 12 shows a configuration example in which the heat sink structure 580 is provided on the lid 510, the housing case may be configured without providing the heat sink structure on the lid.

  FIG. 14 is a cross-sectional view showing another example of phosphor wheel device housing 501 in the fourth embodiment.

  The storage housing 501 includes a lid 561 and the container body 520 shown in FIG.

  Unlike the cover 510 shown in FIG. 12, the cover 561 shown in FIG. 14 does not have a heat sink structure. Except for this point, the storage case 501 shown in FIG. 14 is substantially the same as the storage case 500 shown in FIG.

  As described above, the housing 501 may be configured by providing the heat sink structure 550 only in the container body 520 without providing the heat sink structure in the lid body 561. With this configuration, the lid 561 can be easily formed.

[4-2. Effect]
As described above, in the present embodiment, the phosphor wheel device housing case has the heat exchange element, and the phosphor wheel device is sealed and accommodated. The phosphor wheel device includes a phosphor wheel, a motor, and a plurality of blades. The phosphor wheel has a disk-shaped substrate and a phosphor disposed on one surface of the substrate in the circumferential direction. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor.

  In this phosphor wheel device, it is desirable that the blades are arranged on the other surface of the substrate so as to be located inside the phosphor arrangement position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  The phosphor wheel device housing case may include a first window portion that receives excitation light and emits light emitted from the phosphor. By fitting the first lens unit into the first window, the phosphor wheel device is hermetically housed in the phosphor wheel device housing.

  In the present embodiment, a phosphor, a substrate, or the like that has been heated by excitation light and has risen in temperature can be effectively cooled by an air flow generated when a plurality of blades rotate together with the substrate.

  Further, the heat in the housing can be radiated to the outside through the heat exchange element.

  Each of the storage cases 500 and 501 is an example of a phosphor wheel device storage case. Each of the phosphor wheel devices 100, 100a, 120, and 130 is an example of a phosphor wheel device that is hermetically stored in a phosphor wheel device housing. Each of the heat sink structures 550 and 580 is an example of a heat exchange element. The first window 530 is an example of a first window. The first lens unit 540 is an example of a first lens unit. The phosphor wheel 103 is an example of a phosphor wheel. The motor 104 is an example of a motor. The substrate 101 is an example of a substrate. The blade 211 is an example of a blade. The phosphor 102 is an example of a phosphor.

(Embodiment 5)
Hereinafter, the phosphor wheel device storage housing 502 of the fifth embodiment will be described with reference to FIG.
[5-1. Constitution]
FIG. 15 is a cross-sectional view of phosphor wheel device storage housing 502 according to the fifth embodiment. In this embodiment, as shown in FIG. 15, for the sake of convenience, description will be made using an XYZ orthogonal coordinate system set in the same manner as in FIG.

  In the present embodiment, a configuration example will be described in which the phosphor wheel device 100b having the third structure shown in FIG. The phosphor wheel device housed in the housing housing 502 may be the phosphor wheel device 120 described in the second embodiment or the phosphor wheel device 130 described in the third embodiment. However, this phosphor wheel device has the third structure shown in FIG.

  Note that in the fifth embodiment, the same components as those in the first to fourth embodiments are denoted by the same reference numerals, and redundant description is omitted.

  The storage housing 502 includes a lid body 562 having a structure different from that of the lid body 510 shown in the fourth embodiment, and a container body 520 having substantially the same structure as the container body 520 shown in the fourth embodiment. . The lid body 562 and the container body 520 are formed of a material having excellent thermal conductivity, such as aluminum. That is, the housing case 502 is made of a material having excellent thermal conductivity. In addition, the overlapping description about the container body 520 is omitted.

  Note that the mechanism for cooling the substrate 101b in the storage housing 502 is substantially the same as the mechanism for cooling the substrate 101 in the storage housings 500 and 501 described in the fourth embodiment, and thus redundant description is omitted.

  The lid 562 is provided with a second window 563 for allowing excitation light to enter the back side of the phosphor 102 of the phosphor wheel device 100b housed in the housing housing 502. The second window portion 563 is formed in a shape in which the second lens unit 570 can be fitted. The first lens unit 540 is fitted into the first window portion 530 of the container body 520, and the second lens unit 570 is fitted into the second window portion 563 of the lid body 562, so that the inside of the storage housing 502 is sealed. It will be in the state. That is, the storage housing 502 is a sealed housing, and dust can be prevented from entering from the outside. The storage housing 502 is attached to, for example, a device cabinet 602.

  The second lens unit 570 is configured by attaching a third lens 572 for collecting incident excitation light to the light incident member 571.

  In the cabinet 602, an optical system is set so that the excitation light emitted from the excitation light source is irradiated in the −Y direction (from the top to the bottom in the drawing) as shown by a one-dot chain line in FIG. Yes.

  This excitation light is condensed by the third lens 572 onto the phosphor 102 formed on the substrate 101b of the phosphor wheel device 100b. At this time, as shown in FIG. 6, the excitation light passes through the substrate 101 b and the dichroic film 400 from the back side of the substrate 101 b and is irradiated to the phosphor 102 to excite the phosphor 102. The phosphor 102 formed on the substrate 101b is heated by the condensed excitation light, and the temperature of the substrate 101b rises. The heated phosphor 102 is desirably cooled as described above.

  The mixed light (white light W) of the light emitted from the phosphor 102 excited by the excitation light and the excitation light that has not been used for excitation and passed through the phosphor 102 is, as shown by a one-dot chain line in FIG. The light passes through the lens 542 and the first lens 541 and is emitted in the −Y direction (from the top to the bottom in the drawing).

  In the storage casing 502 configured as described above, as in the storage casings 500 and 501 described in the fourth embodiment, air heated by heat generated when the phosphor 102 is irradiated with excitation light is An air flow is generated by the blades 211 of the fan member 210 and flows along the surface of the heat sink structure 550, and the heat in the housing case 502 is radiated to the outside through the heat sink structure 550.

[5-2. Effect]
As described above, in the present embodiment, the phosphor wheel device housing case has the heat exchange element, and the phosphor wheel device is sealed and accommodated. The phosphor wheel device includes a phosphor wheel, a motor, and a plurality of blades. The phosphor wheel has a disk-shaped substrate and a phosphor disposed on one surface of the substrate in the circumferential direction. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor.

  In this phosphor wheel device, it is desirable that the blades are arranged on the other surface of the substrate so as to be located inside the phosphor arrangement position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  The phosphor wheel device housing case may include a first window portion that emits light emitted from the phosphor and a second window portion that emits excitation light. When the first lens unit is fitted into the first window portion and the second lens unit is fitted into the second window portion, the phosphor wheel device is hermetically stored.

  Also in the present embodiment, the phosphor, the substrate, and the like that have been heated by the excitation light and have risen in temperature can be effectively cooled by the air flow generated by the rotation of the plurality of blades together with the substrate.

  Further, the heat in the housing can be radiated to the outside through the heat exchange element.

  The housing case 502 is an example of a phosphor wheel device housing case. The phosphor wheel devices 100b, 120, and 130 are examples of phosphor wheel devices that are hermetically housed in a phosphor wheel device housing. The heat sink structure 550 is an example of a heat exchange element. The first window 530 is an example of the first window. The second window portion 563 is an example of a second window portion. The first lens unit 540 is an example of a first lens unit. The second lens unit 570 is an example of a second lens unit. The substrate 101b is an example of a substrate. The blade 211 is an example of a blade. The phosphor 102 is an example of a phosphor.

(Embodiment 6)
Hereinafter, a projection display apparatus (hereinafter also referred to as “projector”) according to the sixth embodiment will be described with reference to FIG.
[6-1. Constitution]
FIG. 16 is a diagram schematically illustrating a configuration example of the projection display apparatus (projector 1000) according to the sixth embodiment. A projector 1000 shown in FIG. 16 is a liquid crystal projector using a liquid crystal panel as a light modulation element.

  The light modulation element is an element for modulating the red light R, the green light G, and the blue light B based on the video signal to generate video light.

  In the present embodiment, a configuration example will be described in which projector 1000 includes phosphor wheel device 100b having the third structure shown in FIG. 6 in the first embodiment. Further, in the present embodiment, a configuration example in which the phosphor wheel device 100b is directly installed in the projector 1000 without using the housing case described above is shown. The phosphor wheel device included in projector 1000 may be phosphor wheel device 120 described in the second embodiment or phosphor wheel device 130 described in the third embodiment. However, this phosphor wheel device has the third structure shown in FIG.

  In this embodiment, as shown in FIG. 16, for the sake of convenience, description will be made using an XYZ orthogonal coordinate system. In FIG. 16, the direction perpendicular to the substrate 101b of the phosphor wheel device 100b (the traveling direction of excitation light) is the + X direction, the radial direction of the substrate 101b is the + Y direction, and the radial direction of the substrate 101b perpendicular to the Y axis is + Z. The direction.

  Note that in the sixth embodiment, the same components as those in the first to fifth embodiments are denoted by the same reference numerals, and redundant description is omitted.

  The projector 1000 includes a cabinet 601, a blue laser diode 710, a collimator lens 720, lenses 730, 740, and 820, a diffusion plate 750, a light incident member 571, a phosphor wheel device 100b, and a lens holding frame 543. The first lens 541, the second lens 542, the third lens 572, the integrator lenses 811 and 812, the first dichroic mirror 841, the second dichroic mirror 842, the first mirror 843, and the second mirror 844. A third mirror 845, polarizing plates 851, 852, and 853, a blue liquid crystal panel device 861, a green liquid crystal panel device 862, a red liquid crystal panel device 863, a prism 870, and a projection lens 880.

  In projector 1000, each component is stored in cabinet 601 indicated by a double line. The projector 1000 includes an intake fan (not shown) for cooling the heat generating components in the cabinet 601. The projector 1000 is configured to take outside air into the cabinet 601 by an intake fan and exhaust the heated air heated by the heat-generating components to the outside of the cabinet 601.

  The projector 1000 is configured to take in outside air through a filter (not shown) so that dust is not taken in during intake. Therefore, in projector 1000, this filter prevents dust from entering projector 1000 from the outside.

  A blue laser diode 710 as an example of an excitation light source is configured to emit blue light B as excitation light in the + X direction (from left to right in the drawing). The blue light B emitted from the blue laser diode 710 is collimated by the collimating lens 720, converged by the lens 730 and the lens 740 constituting the afocal system, and then enters the diffusion plate 750.

  The blue light B incident on the diffusion plate 750 is diffused by the diffusion plate 750 and enters the third lens 572 disposed in the light incident member 571. The blue light B that has passed through the third lens 572 is condensed on the phosphor 102 formed on the substrate 101b of the phosphor wheel device 100b. At this time, as shown in FIG. 6, the blue light B (excitation light) passes through the substrate 101 b and the dichroic film 400 from the back side of the substrate 101 b and is irradiated to the phosphor 102 to excite the phosphor 102. . The phosphor 102 formed on the substrate 101b is heated by the condensed excitation light, and the temperature of the substrate 101b rises. The heated phosphor 102 is desirably cooled as described above.

  The mixed light (white light W) of the light emitted from the phosphor 102 excited by the excitation light (yellow light Ye) and the excitation light (blue light B) that has not been used for excitation and passed through the phosphor 102 is shown in FIG. As shown by a one-dot chain line, the light passes through the second lens 542 and the first lens 541 held by the lens holding frame 543 and is emitted in the + X direction (from left to right in the drawing).

  The white light W emitted from the first lens 541 passes through the pair of integrator lenses 811 and 812, is uniformed, passes through the lens 820, and enters the first dichroic mirror 841. The first dichroic mirror 841 has a characteristic of transmitting the blue light B and reflecting other colors of light (green light G and red light R). Therefore, among the white light W emitted from the first lens 541, the blue light B is transmitted through the first dichroic mirror 841, and the light of other colors is reflected by the first dichroic mirror 841. The blue light B transmitted through the first dichroic mirror 841 is reflected by the first mirror 843, passes through the polarizing plate 851, and enters the blue liquid crystal panel device 861.

  The light (green light G, red light R) reflected by the first dichroic mirror 841 enters the second dichroic mirror 842. The second dichroic mirror 842 has a characteristic of reflecting the green light G and transmitting the red light R. Accordingly, among the light reflected by the first dichroic mirror 841, the green light G is reflected by the second dichroic mirror 842, and the red light R is transmitted through the second dichroic mirror 842. The green light G reflected by the second dichroic mirror 842 passes through the polarizing plate 852 and enters the green liquid crystal panel device 862.

  The red light R transmitted through the second dichroic mirror 842 is reflected by the second mirror 844 and the third mirror 845, passes through the polarizing plate 853, and enters the red liquid crystal panel device 863.

  The blue light B incident on the blue liquid crystal panel device 861 is modulated based on the blue video signal to become blue video light. The green light G incident on the green liquid crystal panel device 862 is modulated based on the green video signal to become green video light. The red light R that has entered the red liquid crystal panel device 863 is modulated based on a red video signal to be red video light. The blue image light, the green image light, and the red image light are combined by the prism 870 and enter the projection lens 880. The projection lens 880 enlarges and projects the image light combined by the prism 870 onto a screen (not shown).

  In the projector 1000 configured as described above, the plurality of blades 211 rotate together with the substrate 101b, whereby an air flow is generated in the projector 1000 by the rotating blades 211. Therefore, the air heated by the heat generated when the phosphor 102 is irradiated with excitation light is cooled by the outside air taken in by the intake fan (not shown) included in the projector 1000. Therefore, in the projector 1000, the phosphor 102, the substrate 101b, and the like heated by the excitation light can be efficiently cooled.

  FIG. 16 shows a configuration example in which the phosphor wheel device 100b is directly installed in the projector 1000 without using the housing. However, in order to enhance the effect of preventing dust from adhering to the phosphor wheel device 100b, it is desirable to store the phosphor wheel device 100b in the housing and install it in the projector.

  FIG. 17 is a diagram schematically showing another configuration example of the projection display apparatus (projector 1010) according to the sixth embodiment. A projector 1010 shown in FIG. 17 is a liquid crystal projector using a liquid crystal panel as a light modulation element, similarly to the projector 1000 shown in FIG.

  In projector 1010, unlike projector 1000 shown in FIG. 16, phosphor wheel device 100b is housed in housing housing 502 shown in FIG. 14 in the fifth embodiment and installed in cabinet 602. A cooling fan 610 for cooling the storage case 502 is provided at a position where air can be blown to the heat sink structure 550 of the storage case 502.

  Except for these points, projector 1010 shown in FIG. 17 is substantially the same as projector 1000 shown in FIG.

  In the configuration example shown in FIG. 17, since the phosphor wheel device 100b is housed in the housing housing 502, the effect of preventing dust from adhering to the phosphor 102 can be enhanced. That is, it is possible to enhance the effect of preventing the light emission of the phosphor 102 from being lowered due to the adhesion of dust.

  Also in the projector 1010 configured as described above, the plurality of blades 211 rotate together with the substrate 101b, so that an air flow caused by the rotating blades 211 is generated in the housing housing 502. Therefore, the air heated by the heat generated when the phosphor 102 is irradiated with the excitation light is efficiently cooled through the heat sink structure 550 included in the housing case 502. That is, in the projector 1010, the phosphor 102, the substrate 101b, and the like heated by the excitation light can be efficiently cooled.

[6-2. Effect]
As described above, in the present embodiment, the projection display apparatus includes a phosphor wheel device, a phosphor wheel device housing, an excitation light source that generates excitation light for exciting the phosphor, and an image signal. A light modulation element that modulates the light emission of the phosphor to generate image light. The phosphor wheel device includes a phosphor wheel, a motor, and a plurality of blades. The phosphor wheel has a disk-shaped substrate and a phosphor disposed on one surface of the substrate in the circumferential direction. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor. The phosphor wheel device housing case has a heat exchange element, and encloses and stores the phosphor wheel device.

  In the phosphor wheel device, it is desirable that the blades are disposed on the other surface of the substrate so as to be located on the inner side of the phosphor disposed position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  In the present embodiment, a phosphor, a substrate, or the like that has been heated by excitation light and has risen in temperature can be effectively cooled by an air flow generated when a plurality of blades rotate together with the substrate.

  Each of the projectors 1000 and 1010 is an example of a projection display apparatus. Each of the blue liquid crystal panel device 861, the green liquid crystal panel device 862, and the red liquid crystal panel device 863 is an example of a light modulation element. The blue laser diode 710 is an example of an excitation light source. The phosphor wheel devices 100b, 120, and 130 are examples of phosphor wheel devices that are hermetically housed in a phosphor wheel device housing. The substrate 101b is an example of a substrate. The phosphor 102 is an example of a phosphor. The housing case 502 is an example of a phosphor wheel device housing case. The heat sink structures 550 and 580 are examples of heat exchange elements. The blade 211 is an example of a blade.

(Embodiment 7)
Hereinafter, the projection display apparatus according to the seventh embodiment will be described with reference to FIGS.
[7-1. Constitution]
FIG. 18 is a diagram schematically illustrating a configuration example of the projection display apparatus (projector 1020) according to the seventh embodiment. A projector 1020 shown in FIG. 18 is a DMD projector using a DMD (Digital Mirror Device) as a light modulation element.

  FIG. 19 is a plan view showing the surface on which phosphor 102 is formed of phosphor wheel device 100 provided in the projection display apparatus (projector 1020) according to the seventh embodiment.

  In the present embodiment, the projector 1020 accommodates the phosphor wheel device 100 having the first structure shown in FIG. 4 in the first embodiment in the housing 500 shown in FIG. 12 in the fourth embodiment. A configuration example installed in the cabinet 600 will be described. The phosphor wheel device included in projector 1020 may be phosphor wheel device 120 described in the second embodiment or phosphor wheel device 130 described in the third embodiment. The phosphor wheel device 100 housed in the housing case 500 has the first structure shown in FIG. 4 in the first embodiment, but the phosphor wheel device having the second structure shown in FIG. 100a may be stored in the storage housing 500. Further, the housing case for housing the phosphor wheel device 100 may be the housing body 501 shown in FIG.

  Further, the projector 1020 includes a cooling fan 610 for cooling the housing 500 at a position where air can be blown to the heat sink structures 550 and 580 of the housing 500.

  In this embodiment, as shown in FIG. 18, for the sake of convenience, description will be made using an XYZ orthogonal coordinate system. In FIG. 18, the direction perpendicular to the substrate 101 of the phosphor wheel device 100 (the direction opposite to the traveling direction of the excitation light) is the + Y direction, the radial direction of the substrate 101 is the + X direction, and the radius of the substrate 101 orthogonal to the X axis. The direction is the + Z direction.

  In the phosphor wheel device 100 housed in the housing case 500, the red phosphor 102a, the green phosphor 102b, and the non-fluorescent material in which the phosphor 102 is not formed on the substrate 101 as shown in FIG. The body forming portion 102c is formed in order along the circumferential direction with a substantially constant width.

  Note that in the seventh embodiment, the same components as those in the first to sixth embodiments are denoted by the same reference numerals, and redundant description is omitted.

  The projector 1020 includes a cabinet 600, blue laser diodes 710 and 711, collimating lenses 720 and 721, lenses 730, 731, 740, 741, 913 and 914, diffusion plates 750 and 751, a dichroic mirror 910, 1 lens 541, second lens 542, phosphor wheel device 100, cooling fan 610, housing case 500, condenser lens 911, rod integrator 912, mirrors 915 and 916, DMD 917, and projection lens 918.

  In projector 1020, each component is stored in cabinet 600. Projector 1020 includes an intake fan (not shown) for cooling the heat generating components in cabinet 600. The projector 1020 is configured to take outside air into the cabinet 600 by an intake fan and exhaust the heated air heated by the heat-generating parts to the outside of the cabinet 600.

  A blue laser diode 710, which is an example of an excitation light source, is configured to emit blue light B as excitation light in the -Y direction (from top to bottom in the drawing). The blue light B emitted from the blue laser diode 710 is collimated by the collimating lens 720, converged by the lens 730 and the lens 740 constituting the afocal system, and then enters the diffusion plate 750.

  The blue light B incident on the diffusion plate 750 is diffused by the diffusion plate 750 and then enters the dichroic mirror 910.

  The dichroic mirror 910 is disposed with an inclination of 45 degrees with respect to the optical axis. The dichroic mirror 910 transmits blue light B and reflects light of other colors (red light R and green light G). Therefore, the blue light B that has passed through the diffusion plate 750 passes through the dichroic mirror 910. The blue light B that has passed through the dichroic mirror 910 is condensed on the phosphor 102 formed on the substrate 101 of the phosphor wheel device 100 by the first lens 541 and the second lens 542, and irradiates the phosphor 102.

  Since the substrate 101 of the phosphor wheel device 100 is rotationally driven by the motor 104, the region of the phosphor wheel device 100 (the excitation blue light B is present at the condensing position of the first lens 541 and the second lens 542). The region to be irradiated is sequentially changed to the red phosphor 102a, the green phosphor 102b, and the non-phosphor forming portion 102c. During the period in which the red phosphor 102a is irradiated with the excitation blue light B, the red phosphor 102a is excited and the red phosphor 102a emits red light R. During the period when the excitation blue light B is applied to the green phosphor 102b, the green phosphor 102b is excited and the green phosphor 102b emits green light G. By this condensed excitation light, the red phosphor 102a and the green phosphor 102b formed on the substrate 101 are heated, and the temperature of the substrate 101 rises. The heated red phosphor 102a and green phosphor 102b are desirably cooled as described above.

  Note that the blue laser diode 710 is controlled to be extinguished during a period in which the non-phosphor forming portion 102c exists at the condensing position of the first lens 541 and the second lens 542. Accordingly, the non-phosphor forming portion 102c is not irradiated with the excitation blue light B.

  The red light R emitted from the red phosphor 102a and the green light G emitted from the green phosphor 102b are emitted from the substrate 101 in the −Y direction, respectively. Then, the red light R and the green light G emitted in the −Y direction pass through the second lens 542 and the first lens 541, are reflected by the dichroic mirror 910, are collected by the condenser lens 911, and then the rod integrator. The light enters the incident end 912.

  In the projector cabinet 600, apart from the blue laser diode 710, a blue laser diode 711 configured to emit blue light B in the + X direction (from left to right in the drawing) is provided. The blue laser diode 711 is turned on only during a period in which the blue laser diode 710 is turned off (that is, a period in which the non-phosphor forming portion 102c is at the condensing position of the first lens 541 and the second lens 542), and the blue laser diode 710 is turned on. The lighting period is controlled to be turned off.

  The blue light B emitted from the blue laser diode 711 is collimated by the collimator lens 721 and then enters the lens 731. The blue light B that has passed through the lens 731 is collimated by the lens 741, enters the diffusion plate 751, and is diffused by the diffusion plate 751. The blue light B that has passed through the diffusion plate 751 passes through the dichroic mirror 910, is collected by the condenser lens 911, and then enters the incident end of the rod integrator 912.

  In this way, the red light R, the green light G, and the blue light B are sequentially incident on the incident end of the rod integrator 912 (that is, in a time division manner). The red light R, blue light B, and green light G propagate through the rod integrator 912 and are sequentially emitted from the emission end of the rod integrator 912.

  The light emitted from the rod integrator 912 passes through the lens 913 and the lens 914, is reflected by the mirror 915 and the mirror 916, and enters the DMD 917. The DMD 917 modulates the red light R, the green light G, and the blue light B based on the video signal to generate video light.

  The image light generated by the DMD 917 is emitted from the DMD 917 in the + Y direction and enters the projection lens 918. The projection lens 918 enlarges and projects the image light emitted from the DMD 917 onto a screen (not shown).

  Also in the projector 1020 configured as described above, the plurality of blades 211 rotate together with the substrate 101, so that an air flow caused by the rotating blades 211 is generated in the housing case 500. Therefore, the air heated by the heat generated when the phosphor 102 is irradiated with the excitation light is efficiently cooled through the heat sink structures 550 and 580 included in the housing case 500. That is, the projector 1020 can efficiently cool the phosphor 102, the substrate 101, and the like heated by the excitation light.

[7-2. Effect]
As described above, in the present embodiment, the projection display apparatus includes a phosphor wheel device, a phosphor wheel device housing, an excitation light source that generates excitation light for exciting the phosphor, and an image signal. A light modulation element that modulates the light emission of the phosphor to generate image light. The phosphor wheel device includes a phosphor wheel, a motor, and a plurality of blades. The phosphor wheel has a disk-shaped substrate and a phosphor disposed on one surface of the substrate in the circumferential direction. The motor rotationally drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel, and extend in the radial direction of the phosphor wheel from the rotating shaft of the motor. The phosphor wheel device housing case has a heat exchange element, and encloses and stores the phosphor wheel device.

  In the phosphor wheel device, it is desirable that the blades are disposed on the other surface of the substrate so as to be located on the inner side of the phosphor disposed position. In addition, the distance from the blade to the phosphor is preferably set to be equal to or higher than the height of the blade.

  Also in the present embodiment, the phosphor, the substrate, and the like that have been heated by the excitation light and have risen in temperature can be effectively cooled by the air flow generated by the rotation of the plurality of blades together with the substrate.

  The projector 1020 is an example of a projection display apparatus. The DMD 917 is an example of a light modulation element. The blue laser diode 710 is an example of an excitation light source. The phosphor wheel devices 100, 120, and 130 are examples of the phosphor wheel device that is hermetically housed in the phosphor wheel device housing. The motor 104 is an example of a motor. The substrate 101 is an example of a substrate. Each of the phosphor 102, the red phosphor 102a, and the green phosphor 102b is an example of a phosphor. Each of the storage cases 500 and 501 is an example of a phosphor wheel device storage case. The heat sink structures 550 and 580 are examples of heat exchange elements. The blade 211 is an example of a blade.

(Other embodiments)
As described above, Embodiments 1 to 7 have been described as examples of the technology disclosed in the present application. However, the technology in the present disclosure is not limited to this, and can also be applied to embodiments in which changes, replacements, additions, omissions, and the like are performed. Moreover, it is also possible to combine each component demonstrated in the said Embodiment 1-7, and it can also be set as a new embodiment.

  The present disclosure can be applied to a phosphor wheel device used in a projection image display device, a phosphor wheel device housing case that houses the phosphor wheel device, and a projection image display device including the phosphor wheel device. It is. Specifically, the present disclosure is applicable to a liquid crystal projector, a DMD projector, and the like.

100, 100a, 100b, 120, 130 Phosphor wheel device 101, 101a, 101b, 111 Substrate 102 Phosphor 103, 103a, 103b Phosphor wheel 104 Motor 104a Rotor 104b Stator 105 Flexible substrate 106, 213, 223 Screw hole 210, 220 Fan member 211, 221, 230 Blade 212, 222 Opening 300 Reflective film 400 Dichroic film 500, 501, 502 Storage housing 510, 561, 562 Lid 520 Container body 530 First window 540 First lens unit 541 First 1 lens 542 2nd lens 543 Lens holding frame 550, 580 Heat sink structure 551, 581 Fin 563 2nd window 570 2nd lens unit 571 Light incident member 572 3rd lens 600, 601, 602 Cabinet 610 Cooling fan 710, 711 Blue laser diode 720, 721 Collimate lens 730, 731, 740, 741, 820, 913, 914 Lens 750, 751 Diffuser plate 811, 812 Integrator lens 841 First dichroic mirror 842 Second dichroic mirror 843 First mirror 844 Second mirror 845 Third mirror 851, 852, 853 Polarizing plate 861 Blue liquid crystal panel device 862 Green liquid crystal panel device 863 Red liquid crystal panel device 870 Prism 880, 918 Projection lens 910 Dichroic mirror 911 Condensing lens 912 Rod integrator 915,916 Mirror 917 DMD
1000, 1010, 1020 projector

Claims (18)

A phosphor wheel having a disk-shaped substrate and a phosphor disposed in a circumferential direction on one surface of the substrate;
A motor that rotationally drives the phosphor wheel;
A plurality of blades fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel and extending in a radial direction of the phosphor wheel from a rotation shaft of the motor,
Phosphor wheel device. The blade is disposed on the other surface of the substrate so as to be located on the inner side of the position where the phosphor is disposed.
The phosphor wheel device according to claim 1. The distance from the blade to the phosphor was set to be higher than the height of the blade,
The phosphor wheel device according to claim 2. A fan member having the plurality of blades is fixed to the other surface of the substrate;
The phosphor wheel device according to claim 1. The fan member is formed by bending a metal plate,
The phosphor wheel device according to claim 4. The plurality of blades and the substrate are integrally formed,
The phosphor wheel device according to claim 1. In the region where at least the phosphor is disposed on the one surface of the substrate, a front surface is processed so as to reflect light emitted from the phosphor.
The phosphor wheel device according to claim 1. The substrate is
Made of thermally conductive material,
The phosphor wheel device according to claim 1. The substrate is
Formed of aluminum alloy,
The phosphor wheel device according to claim 8. The substrate is
Formed of sapphire glass,
The phosphor wheel device according to claim 8. A phosphor wheel device housing housing that has a heat exchange element and seals and stores the phosphor wheel device,
The phosphor wheel device includes:
A phosphor wheel having a disk-shaped substrate and a phosphor disposed in a circumferential direction on one surface of the substrate;
A motor that rotationally drives the phosphor wheel;
A plurality of blades fixed to the other surface of the substrate so as to rotate integrally with the phosphor wheel and extending in a radial direction of the phosphor wheel from a rotation shaft of the motor,
Phosphor wheel device housing. The blade is disposed on the other surface of the substrate so as to be located on the inner side of the position where the phosphor is disposed.
The phosphor wheel device housing case according to claim 11. The distance from the blade to the phosphor was set to be higher than the height of the blade,
The phosphor wheel device housing case according to claim 12. A first window portion for entering excitation light and emitting light emitted from the phosphor,
By fitting the first lens unit into the first window portion, the phosphor wheel device is hermetically stored.
The phosphor wheel device housing case according to claim 11. A first window that emits light emitted from the phosphor;
A second window part for entering the excitation light,
The first lens unit is fitted into the first window part, and the second lens unit is fitted into the second window part, whereby the phosphor wheel device is hermetically stored.
The phosphor wheel device housing case according to claim 11. A phosphor wheel having a disk-shaped substrate and a phosphor disposed in a circumferential direction on one surface of the substrate, a motor for driving the phosphor wheel to rotate, and the phosphor wheel rotating together. A plurality of blades fixed to the other surface of the substrate and extending in the radial direction of the phosphor wheel from the rotating shaft of the motor, and a phosphor wheel device comprising:
A phosphor wheel device housing housing that has a heat exchange element and seals and stores the phosphor wheel device;
An excitation light source for generating excitation light for exciting the phosphor;
An optical modulation element that modulates incident light based on a video signal to generate video light,
Projection display device. The blade is disposed on the other surface of the substrate so as to be located on the inner side of the position where the phosphor is disposed.
The projection display apparatus according to claim 16. The distance from the blade to the phosphor was set to be higher than the height of the blade,
The projection display apparatus according to claim 17.

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