JP5811754B2 - Blinking light generator, time-division light generator, and projector - Google Patents

Description

  The present invention relates to a blinking light generation device, a time division light generation device, and a projector.

  The projector emits light emitted from a light source to a reflective display element such as a digital micromirror device or a transmissive display element such as a liquid crystal shutter array panel, and an image formed by the display element is projected onto a screen by a projection lens. To do. Conventionally, projectors that use high-intensity discharge lamps as light sources have been mainstream. However, in recent years, there have been many developments of projectors that use light emitting elements such as light emitting diodes, laser diodes, and organic electroluminescence elements as light sources, and phosphors that convert the color of light emitted from the light sources as necessary. Yes. For example, Japanese Unexamined Patent Application Publication No. 2004-341105 (Patent Document 1) discloses a projector using a light emitting diode and a phosphor wheel. This light emitting diode emits ultraviolet light as excitation light, and the excitation light emitted from the light emitting diode is sequentially and repeatedly irradiated onto the red phosphor layer, the green phosphor layer and the blue phosphor layer of the rotating phosphor wheel. . Then, since the red phosphor layer, the green phosphor layer, and the blue phosphor layer are sequentially and repeatedly excited, red light, green light, and blue light are sequentially emitted from the phosphor wheel.

JP 2004-341106 A

  On the other hand, instead of using a single light-emitting diode, a red light-emitting diode, a green light-emitting diode, and a blue light-emitting diode are used, and these light-emitting diodes are sequentially turned on in a time-sharing manner, so that red, green, and blue light are emitted. Techniques have also been proposed in which the axes are overlapped by an optical system such as a dichroic mirror. If a light emitting diode of any color is weaker than other light emitting diodes, a phosphor may be used for light emission of that color. By irradiating the phosphor with, light of that color is generated from the phosphor. However, when the excitation light is locally irradiated on the phosphor, the phosphor is likely to be deteriorated and the phosphor has a short life. Therefore, by forming the phosphor on the rotating wheel plate, it is possible to prevent the excitation light from being locally irradiated to a part of the phosphor and to extend the life of the phosphor.

  The wheel plate is obtained by processing a rolled plate wound in a coil shape. Therefore, the wheel plate is slightly curved in a cylindrical surface shape. As the curved wheel plate rotates, the distance from the intersection of the optical axis of the condensing lens and the phosphor to the condensing lens varies. Then, the spot diameter of the excitation light irradiated on the phosphor varies depending on the irradiation position, and uniform fluorescence does not occur.

  Therefore, the problem to be solved by the present invention is that when the phosphor formed on the curved wheel plate is irradiated with excitation light, even if the irradiation position of the excitation light changes due to the rotation of the wheel plate, the phosphor emits from the phosphor. It is to make the fluorescence uniform.

In order to solve the above-described problems, a blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, and one surface of both surfaces is formed in a cylindrical convex shape. A wheel plate having a cylindrical concave surface on the other surface, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and an emission light source from the excitation light source. A condensing optical system for condensing the excited excitation light on the phosphor layer, a phase detection unit for detecting the rotational phase of the wheel plate, and the excitation light source based on the rotational phase detected by the phase detection unit. A light source control unit that blinks, and the light source control unit surrounds a first radius along the generatrix direction of the one surface of the wheel plate of the phosphor layer during rotation of the wheel plate. The excitation light when an arc-shaped irradiation region straddling along the direction and orthogonal to the first radius does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. the light source is lit, the first radius and linearly becomes fourth radii, the second straddle the radius and the third radius in the circumferential direction, arcuate unirradiated region does not cross the first radius The excitation light source is turned off when passing through the optical axis of the condensing optical system.

The blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is a cylindrical concave surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit straddles the first radius along the generatrix direction of the one surface of the wheel plate along the circumferential direction of the phosphor layer during the rotation of the wheel plate. Half When the arc-shaped first irradiation region that does not cross the pair of the second radius and the third radius orthogonal to each other passes through the optical axis of the condensing optical system, the first radius is linear with the first radius. The excitation light source is turned on when an arc-shaped second irradiation region that straddles four radii along the circumferential direction and does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the second radius in the circumferential direction and not across the first radius and the fourth radius passes through the optical axis of the condensing optical system, and the third radius The excitation light source is extinguished when an arc-shaped second non-irradiation region straddling the first radius and the fourth radius across the circumferential direction passes through the optical axis of the condensing optical system.

  The blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is a cylindrical concave surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit is configured to rotate a third of the phosphor layers perpendicular to a pair of first and second radii along a generatrix direction of the one surface of the wheel plate during rotation of the wheel plate. The excitation light source is turned on when the arc-shaped irradiation region that spans the diameter in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, The excitation light source is extinguished when an arc-shaped non-irradiation region straddling the radius and the second radius in the circumferential direction passes through the optical axis of the condensing optical system.

The blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is a cylindrical concave surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit is configured to rotate a third of the phosphor layers perpendicular to a pair of first and second radii along a generatrix direction of the one surface of the wheel plate during rotation of the wheel plate. When the arc-shaped first irradiation region straddling the diameter in the circumferential direction and not across the first radius and the second radius passes through the optical axis of the condensing optical system, and linearly with the third radius The excitation light source is turned on when an arc-shaped second irradiation region that straddles the fourth radius in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the first radius in the circumferential direction and not across the third radius and the fourth radius passes through the optical axis of the condensing optical system, and the second radius The excitation light source is extinguished when an arc-shaped second non-irradiation region that straddles the third radius and the fourth radius across the circumferential direction passes through the optical axis of the condensing optical system.

A blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is a cylindrical convex surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit straddles the first radius along the generatrix direction of the one surface of the wheel plate along the circumferential direction of the phosphor layer during the rotation of the wheel plate. Half Is turned the excitation light source when the arc-shaped illumination area does not cross the pair of second radius and the third radius perpendicular passes through the optical axis of said focusing optical system with respect to, said first radius An arc-shaped non-irradiation region that crosses the fourth radius, the second radius, and the third radius along the circumferential direction along the circumferential direction and does not cross the first radius passes through the optical axis of the condensing optical system. When doing so, the excitation light source is turned off.

A blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is a cylindrical convex surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit straddles the first radius along the generatrix direction of the one surface of the wheel plate along the circumferential direction of the phosphor layer during the rotation of the wheel plate. Half When the arc-shaped first irradiation region that does not cross the pair of the second radius and the third radius orthogonal to each other passes through the optical axis of the condensing optical system, the first radius is linear with the first radius. The excitation light source is turned on when an arc-shaped second irradiation region that straddles four radii along the circumferential direction and does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the second radius in the circumferential direction and not across the first radius and the fourth radius passes through the optical axis of the condensing optical system, and the third radius The excitation light source is extinguished when an arc-shaped second non-irradiation region straddling the first radius and the fourth radius across the circumferential direction passes through the optical axis of the condensing optical system.

  A blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is a cylindrical convex surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit is configured to rotate a third of the phosphor layers perpendicular to a pair of first and second radii along a generatrix direction of the one surface of the wheel plate during rotation of the wheel plate. The excitation light source is turned on when the arc-shaped irradiation region that spans the diameter in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, The excitation light source is extinguished when an arc-shaped non-irradiation region straddling the radius and the second radius in the circumferential direction passes through the optical axis of the condensing optical system.

A blinking light generator according to the present invention is rotated by a rotation driver and the rotation driver, is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is a cylindrical convex surface A wheel plate formed in a shape, a phosphor layer formed on the one surface of the wheel plate, an excitation light source that emits excitation light, and excitation light emitted from the excitation light source to the phosphor layer A condensing optical system for condensing, a phase detector for detecting a rotational phase of the wheel plate, and a light source controller for blinking the excitation light source based on the rotational phase detected by the phase detector. The light source control unit is configured to rotate a third of the phosphor layers perpendicular to a pair of first and second radii along a generatrix direction of the one surface of the wheel plate during rotation of the wheel plate. When the arc-shaped first irradiation region straddling the diameter in the circumferential direction and not across the first radius and the second radius passes through the optical axis of the condensing optical system, and linearly with the third radius The excitation light source is turned on when an arc-shaped second irradiation region that straddles the fourth radius in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the first radius in the circumferential direction and not across the third radius and the fourth radius passes through the optical axis of the condensing optical system, and the second radius The excitation light source is extinguished when an arc-shaped second non-irradiation region that straddles the third radius and the fourth radius across the circumferential direction passes through the optical axis of the condensing optical system.

  According to the present invention, even if the curved wheel plate is rotating, in the irradiation region, since the fluctuation range of the distance from the intersection of the optical axis of the condensing optical system and the phosphor layer to the condensing optical system is small, The fluctuation range of the spot diameter of the excitation light irradiated on the phosphor is also small. Therefore, even if the irradiation position of the excitation light is changed by the rotation of the wheel plate, uniform fluorescence is emitted from the phosphor layer.

It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the 1st Embodiment of this invention. It is the schematic which showed the blinking light generator with the partial cross section along II-II of FIG. It is the fragmentary sectional view which looked at the surface along III-III of FIG. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the 1st Embodiment of this invention. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the 2nd Embodiment of this invention. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the 2nd Embodiment of this invention. It is the fragmentary sectional view which showed the fluorescent substance wheel and rotation drive of the blinking light generator which concern on the 3rd Embodiment of this invention. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the same embodiment. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the same embodiment. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the 4th Embodiment of this invention. It is the top view which showed the fluorescent substance wheel of the blinking light generator which concerns on the 4th Embodiment of this invention. It is the top view which showed the optical unit of the projector which concerns on the 5th Embodiment of this invention. FIG. 2 is a block diagram showing a projector according to the same embodiment.

  EMBODIMENT OF THE INVENTION Below, the form for implementing this invention is demonstrated using drawing. However, the embodiments described below are given various technically preferable limitations for carrying out the present invention, but the scope of the present invention is not limited to the following embodiments and illustrated examples.

[First Embodiment]
FIG. 1 is a plan view of the phosphor wheel 2. FIG. 2 is a schematic view showing the flashing light generator 1 together with a cross section of the phosphor wheel 2 shown by looking at the surface along II-II shown in FIG. 1 in the direction of the arrow. FIG. 3 is a cross-sectional view showing a surface along III-III in FIG. 1 as seen in the direction of the arrow.

  The flashing light generator 1 includes a phosphor wheel 2, a spindle motor 6 that rotates the phosphor wheel 2, a motor driver 12 that drives the spindle motor 6, an excitation light source 8 that emits excitation light, and excitation light. A condensing optical system 9 that condenses the light source 8 on the phosphor wheel 2, a light source control unit 10 that blinks the excitation light source 8, and a phase sensor 11 that detects the rotational phase of the phosphor wheel 2 are provided. The phosphor wheel 2 has a wheel plate 3, a phosphor layer 4 and a timing mark 5.

  The wheel plate 3 is a circular plate, more specifically, a copper plate, an aluminum plate, a stainless plate, or other metal plate. One surface 3 a of the wheel plate 3 is subjected to mirror polishing, silver vapor deposition, or other mirror surface processing, and a reflective surface is formed on one surface 3 a of the wheel plate 3. Therefore, the wheel plate 3 is a reflecting plate.

  The spindle motor 6 is a rotary drive. The drive shaft 7 of the spindle motor 6 is attached to the wheel plate 3 so as to be orthogonal to the wheel plate 3. Specifically, the mounting hole 3c passes through the central portion of the wheel plate 3 from one surface 3a to the other surface 3b, the drive shaft 7 of the spindle motor 6 is inserted into the mounting hole 3c, and the drive shaft 7 is It is fixed to the wheel plate 3. Hereinafter, the axial direction refers to the direction in which the drive shaft 7 extends, the circumferential direction refers to the circumferential direction around the drive shaft 7, and the radial direction refers to the direction orthogonal to the drive shaft 7. .

  A phosphor layer 4 is formed on one surface 3 a of the wheel plate 3. As viewed in the axial direction, the phosphor layer 4 is formed in an annular shape so as to extend in the circumferential direction about the drive shaft 7. The phosphor layer 4 is not formed in an annular shape, but the phosphor layer 4 may be formed on the entire one surface 3 a of the wheel plate 3, or the central angle about the drive shaft 7. It may be formed in a fan shape of 120 ° or more, or may be formed in an arc belt shape having a central angle of 120 ° or more around the drive shaft 7. It is preferable that the phosphor layer 4 is formed in an annular shape or formed on the entire one surface 3 a of the wheel plate 3 so that the center of gravity of the wheel plate 3 overlaps the drive shaft 7.

  A ring-shaped recess may be formed in one surface 3a of the wheel plate 3, and the phosphor layer 4 may be embedded in the recess. Even when the recess is formed, the recess is mirror-finished.

  The wheel plate 3 is obtained by punching a rolled plate. Since the rolled plate before punching is wound in a coil shape, the wheel plate 3 is curved in a cylindrical shape. Therefore, one surface 3a of the wheel plate 3 is formed in a cylindrical convex shape, and the other surface 3b is formed in a cylindrical concave shape.

  Since one surface 3a of the wheel plate 3 is a cylindrical convex surface, as shown in FIG. 1, the one surface 3a of the wheel plate 3 has a first radius along the generatrix direction (ridgeline direction) of the surface 3a. There is 3d1. The one surface 3a of the wheel plate 3 has a second radius 3d2 and a third radius 3d3 orthogonal to the first radius 3d1. The second radius 3d2 and the third radius 3d3 are in a straight line, and the second radius 3d2 and the third radius 3d3 form a diameter. One surface 3a of the wheel plate 3 has a fourth radius 3d4 along the generatrix direction (ridgeline direction) of the surface 3a. The first radius 3d1 and the fourth radius 3d4 are in a straight line, and the first radius 3d1 and the fourth radius 3d4 form a diameter. Further, in the phosphor layer 4, an arcuate region 4a that straddles the first radius 3d1 along the circumferential direction and does not straddle the second radius 3d2, the third radius 3d3, and the fourth radius 3d4 is referred to as an irradiation region 4a. The arcuate region 4b that straddles the second radius 3d2, the third radius 3d3, and the fourth radius 3d4 along the circumferential direction and does not straddle the first radius 3d1 is referred to as a non-irradiated region 4b. The irradiation region 4a is a region extending in an arc shape in the circumferential direction around the first radius 3d1, and the non-irradiation region 4b is a region extending in an arc shape in the circumferential direction around the fourth radius 3d4. A combination of the region 4a and the non-irradiation region 4b becomes an annular region. The central angle of the irradiated region 4a is more than 0 ° and less than 180 °, the central angle of the non-irradiated region 4b is more than 180 ° and less than 360 °, and the sum of these is 360 °. For example, the central angle of the irradiation region 4a is 120 °, and the central angle of the non-irradiation region 4b is 240 °.

  An excitation light source 8 is disposed around the phosphor wheel 2 and the spindle motor 6. The excitation light source 8 is a light emitting diode or a laser diode array. The laser diode array is a plurality of laser diodes arranged in a two-dimensional array.

  The excitation light source 8 emits excitation light. The wavelength band of the excitation light emitted from the excitation light source 8 is not particularly limited, but the excitation light is preferably monochromatic visible light. For example, the excitation light emitted from the excitation light source 8 is light in a blue wavelength band. The excitation light emitted from the excitation light source 8 may be ultraviolet light.

  A condensing optical system 9 is disposed between the excitation light source 8 and one surface 3 a of the wheel plate 3. The condensing optical system 9 is composed of one or a plurality of lenses. The condensing optical system 9 may have a reflecting mirror, and the optical axis of the condensing optical system 9 may be bent by the reflecting mirror.

  The optical axis of the condensing optical system 9 intersects the excitation light source 8. In addition, the optical axis of the condensing optical system 9 is substantially parallel to the drive shaft 7, and the optical axis of the condensing optical system 9 is shifted radially outward from the drive shaft 7. The distance from the intersection of the optical axis of the condensing optical system 9 and the wheel plate 3 to the drive shaft 7 is substantially equal to the distance from the drive shaft 7 to the phosphor layer 4. Therefore, the optical axis of the condensing optical system 9 passes through the phosphor layer 4. When the excitation light source 8 emits light, the excitation light emitted from the excitation light source 8 is condensed on the phosphor layer 4 by the condensing optical system 9. The direction in which the excitation light travels is the direction from one surface 3a of the wheel plate 3 toward the other surface 3b.

  When excitation light emitted from the excitation light source 8 enters the phosphor layer 4, the phosphor layer 4 is excited by the excitation light and emits fluorescence. As long as the wavelength band of the fluorescence emitted from the phosphor layer 4 is different from the wavelength band of the excitation light emitted from the excitation light source 8, the wavelength band of the fluorescence is not particularly limited. However, the fluorescence emitted from the phosphor layer 4 is preferably monochromatic visible light. More preferably, the color of the fluorescence emitted from the phosphor layer 4 is another color among the three primary colors of light. For example, the fluorescence emitted from the phosphor layer 4 is light in the green wavelength band.

  Timing marks 5 are formed on the peripheral side surface of the wheel plate 3. The number of timing marks 5 may be 1 or 2 or more. When there are a plurality of timing marks 5, the timing marks 5 are arranged along the circumferential direction.

  On the outer side of the peripheral side surface of the wheel plate 3, the phase sensor 11 is disposed to face the peripheral side surface of the wheel plate 3. The phase sensor 11 detects each time the timing mark 5 passes the proximity position facing the phase sensor 11 by the rotation of the wheel plate 3, and outputs a pulse signal to the light source control unit 10. That is, the phase sensor 11 detects the rotational phase of the wheel plate 3. The phase sensor 11 is an optical sensor including a light projecting element and a light receiving element. The phase sensor 11 may be one or a plurality of hall elements provided in the motor 6 instead of the optical sensor that detects the timing mark 5, or may be a rotary encoder provided in the motor 6.

  The motor driver 12 drives the spindle motor 6 in accordance with a command from the light source control unit 10. The light source control unit 10 controls the rotational speed of the spindle motor 6 via the motor driver 12. For example, the light source control unit 10 controls the spindle motor 6 at a constant speed and changes / adjusts the rotational speed of the spindle motor 6.

  Further, the light source control unit 10 blinks the excitation light source 8 and controls the blinking cycle and lighting / extinguishing timing of the excitation light source 8 based on the rotational phase detected by the phase sensor 11. Specifically, the light source control unit 10 turns on the excitation light source 8 when the irradiation region 4a of the phosphor layer 4 intersects the optical axis of the condensing optical system 9 (the optical axis of the excitation light), and does not irradiate the light. When the region 4b intersects the optical axis of the condensing optical system 9, the excitation light source 8 is turned off. Since the rotational phase of the wheel plate 3 detected by the phase sensor 11 is output to the light source control unit 10, the light source control unit 10 is configured such that the irradiation region 4 a has the optical axis of the condensing optical system 9 (the optical axis of the excitation light). ) And the timing at which the non-irradiated region 4b passes through the optical axis of the condensing optical system 9 can be recognized.

Next, the operation of the blinking light generator 1 will be described.
When the light source controller 10 operates the spindle motor 6, the wheel plate 3 is rotated by the spindle motor 6. During the rotation of the wheel plate 3, the rotation phase of the wheel plate 3 is detected by the phase sensor 11, and the rotation phase detected by the phase sensor 11 is output to the light source control unit 10. During the rotation of the wheel plate 3, the light source control unit 10 blinks the excitation light source 8 at a timing based on the rotational phase detected by the phase sensor 11. That is, when the irradiation region 4 a passes through the optical axis of the condensing optical system 9, the light source control unit 10 turns on the excitation light source 8 and the non-irradiation region 4 b passes through the optical axis of the condensing optical system 9. The light source control unit 10 turns off the excitation light source 8 when it is in operation. Therefore, excitation light is irradiated to the irradiation region 4a in the phosphor layer 4, but excitation light is not irradiated to the non-irradiation region 4b.

  When excitation light enters the irradiation region 4 a of the phosphor layer 4, the phosphor layer 4 is excited by the excitation light, and fluorescence in a wavelength band different from that of the excitation light is emitted from the phosphor layer 4. Further, even if part of the excitation light passes through the phosphor layer 4, the excitation light is reflected by the one surface 3 a of the wheel plate 3, and the phosphor layer 4 is excited by the reflected light, so that the phosphor layer 4 Fluoresce from. Therefore, the excitation light is converted into fluorescence having a color different from that of the excitation light by the phosphor layer 4. Fluorescence emitted from the phosphor layer 4 is diffused light having low convergence and directivity. The fluorescence optical axis (the fluorescence optical axis is a virtual light extending from the phosphor layer 4 in the direction in which the luminous intensity becomes maximum). Is the optical axis of the condensing optical system 9. The fluorescence emitted from the phosphor layer 4 is projected in a predetermined direction by the optical unit.

  As described above, since the wheel plate 3 is curved in a cylindrical shape, when the wheel plate 3 is rotated, the condensing optical system 9 is determined from the intersection of the optical axis of the condensing optical system 9 and the phosphor layer 4. The distance to fluctuates. Even if there is such a variation in distance, the irradiation region 4a straddles the first radius 3d1 along the generatrix direction (ridgeline direction) of the one surface 3a of the wheel plate 3, but is orthogonal to the first radius 3d1. Since the radii 3d2 and 3d3 are not straddled, the fluctuation range of the distance from the intersection of the optical axis of the condensing optical system 9 and the phosphor layer 4 to the condensing optical system 9 is small in the irradiation region 4a. For this reason, the spot diameter of the excitation light incident on the irradiation region 4a does not vary greatly, and the excitation light is uniform and uniform regardless of the position in the irradiation region 4a. Therefore, uniform and uniform fluorescence is emitted regardless of the position where the excitation light enters the irradiation region 4a.

  As shown in FIG. 4, the light source control unit 10 includes the second irradiation region when the first irradiation region 4 a 1 of the phosphor layer 4 passes through the optical axis of the condensing optical system 9 (the optical axis of excitation light). The excitation light source 8 is turned on when 4a2 passes the optical axis of the condensing optical system 9 (the optical axis of the excitation light), and when the first non-irradiation region 4b1 passes the optical axis of the condensing optical system 9 and The excitation light source 8 may be turned off when the second non-irradiation region 4b2 passes through the optical axis of the condensing optical system 9. Here, the first irradiation region 4a1 is an arcuate region of the phosphor layer 4 that straddles the first radius 3d1 along the circumferential direction and does not straddle the second radius 3d2, the third radius 3d3, and the fourth radius 3d4. Say. The second irradiation region 4a2 is an arcuate region of the phosphor layer 4 that straddles the fourth radius 3d4 along the circumferential direction and does not straddle the first radius 3d1, the second radius 3d2, and the third radius 3d3. The first non-irradiation region 4b1 is an arcuate region of the phosphor layer 4 that straddles the second radius 3d2 along the circumferential direction and does not straddle the first radius 3d1, the third radius 3d3, and the fourth radius 3d4. . The second non-irradiated region 4b2 is an arcuate region of the phosphor layer 4 that straddles the third radius 3d3 along the circumferential direction and does not straddle the first radius 3d1, the second radius 3d2, and the fourth radius 3d4. . The first irradiation region 4a1 is a region that extends in an arc shape in the circumferential direction around the first radius 3d1, and the second irradiation region 4a2 is a region that extends in an arc shape in the circumferential direction around the fourth radius 3d4. The first non-irradiation region 4b1 is a region that extends in a circular arc shape around the second radius 3d2, and the second non-irradiation region 4b2 is a circular arc shape around the third radius 3d3 in the circumferential direction. It is an expanded area. The sum of the central angles of the irradiation regions 4a1, 4a2 and the non-irradiation regions 4b1, 4b2 is 360 °, and the combination of the irradiation regions 4a1, 4a2 and the non-irradiation regions 4b1, 4b2 becomes an annular region. For example, the central angles of the irradiation regions 4a1 and 4a2 are 60 °, and the central angles of the non-irradiation regions 4b1 and 4b2 are 120 °.

[Second Embodiment]
The second embodiment is different from the first embodiment in lighting / extinguishing timing of the excitation light source 8. The second embodiment and the first embodiment are the same except for the timing of turning on / off the excitation light source 8.

  Here, since the one surface 3a of the wheel plate 3 is a cylindrical convex surface, as shown in FIG. 5, the one surface 3a of the wheel plate 3 has a first radius 3g1 along the generatrix direction of the surface 3a. And a second radius 3g2. The first radius 3g1 and the second radius 3g2 are in a straight line, and the first radius 3g1 and the second radius 3g2 form a diameter. The one surface 3a of the wheel plate 3 has a third radius 3g3 and a fourth radius 3g4 orthogonal to the first radius 3g1 and the second radius 3g2. The third radius 3g3 and the fourth radius 3g4 are in a straight line, and the third radius 3g3 and the fourth radius 3g4 form a diameter. Among the phosphor layers 4, an arcuate region 4c that straddles the third radius 3g3 along the circumferential direction and does not straddle the first radius 3g1, the second radius 3g2, and the fourth radius 3g4 is referred to as an irradiation region 4c. An arcuate region 4d that straddles the radius 3g1, the second radius 3g2, and the fourth radius 3g4 along the circumferential direction and does not straddle the third radius 3g3 is referred to as a non-irradiation region 4d. The irradiation region 4c is a region that extends in a circular arc shape around the third radius 3g3, and the non-irradiation region 4d is a region that extends in a circular arc shape around the fourth radius 3g4. The central angle of the irradiated region 4c is more than 0 ° and less than 180 °, the central angle of the non-irradiated region 4d is more than 180 ° and less than 360 °, and the sum of these is 360 °. For example, the central angle of the irradiation region 4c is 120 °, and the central angle of the non-irradiation region 4d is 240 °.

  The light source control unit 10 (see FIG. 2) controls the blinking cycle and lighting / extinguishing timing of the excitation light source 8 based on the rotational phase detected by the phase sensor 11. That is, the light source control unit 10 turns on the excitation light source 8 when the irradiation region 4 c of the phosphor layer 4 intersects the optical axis of the condensing optical system 9, and the non-irradiation region 4 d is the light of the condensing optical system 9. When crossing the axis, the excitation light source 8 is turned off.

  When the wheel plate 3 is rotating, the variation range of the distance from the intersection of the optical axis of the condensing optical system 9 and the phosphor layer 4 to the condensing optical system 9 is small in the irradiation region 4c. Therefore, the spot diameter of the excitation light incident on the irradiation region 4c does not vary greatly. Therefore, uniform and uniform fluorescence is emitted regardless of the position where the excitation light enters the irradiation region 4c.

  As shown in FIG. 6, the light source control unit 10 includes the second irradiation region when the first irradiation region 4 c 1 of the phosphor layer 4 passes through the optical axis of the condensing optical system 9 (the optical axis of the excitation light). The excitation light source 8 is turned on when 4c2 passes the optical axis of the condensing optical system 9 (the optical axis of the excitation light), and when the first non-irradiation region 4d1 passes the optical axis of the condensing optical system 9 and The excitation light source 8 may be turned off when the second non-irradiation region 4d2 passes through the optical axis of the condensing optical system 9. Here, the first irradiation region 4c1 is an arcuate region of the phosphor layer 4 that straddles the third radius 3g3 along the circumferential direction and does not straddle the first radius 3g1, the second radius 3g2, and the fourth radius 3g4. Say. The second irradiation region 4c2 is an arcuate region of the phosphor layer 4 that straddles the fourth radius 3g4 along the circumferential direction and does not straddle the first radius 3g1, the second radius 3g2, and the third radius 3g3. The first non-irradiated region 4d1 is an arcuate region of the phosphor layer 4 that straddles the first radius 3g1 along the circumferential direction and does not straddle the second radius 3g2, the third radius 3g3, and the fourth radius 3g4. . The second non-irradiation region 4d2 is an arcuate region of the phosphor layer 4 that straddles the second radius 3g2 along the circumferential direction and does not straddle the first radius 3g1, the third radius 3g3, and the fourth radius 3g4. . The first irradiation region 4c1 is a region that extends in a circular arc shape around the third radius 3g3, and the second irradiation region 4c2 is a region that extends in a circular arc shape around the fourth radius 3g4. The first non-irradiation region 4d1 is a region that extends in an arc shape in the circumferential direction around the first radius 3g1, and the second non-irradiation region 4d2 is in an arc shape in the circumferential direction around the second radius 3g2. It is an expanded area. The sum of the central angles of the irradiation regions 4c1 and 4c2 and the non-irradiation regions 4d1 and 4d2 is 360 °, and the combination of the irradiation regions 4c1 and 4c2 and the non-irradiation regions 4d1 and 4d2 becomes an annular region. For example, the central angles of the irradiation regions 4c1 and 4c2 are 60 °, and the central angles of the non-irradiation regions 4d1 and 4d2 are 120 °.

[Third Embodiment]
The third embodiment is different from the first embodiment in the curvature of the wheel plate 3. That is, as shown in FIG. 7, the wheel plate 3 is curved in a cylindrical shape so as to be opposite to the curve of the wheel plate 3 in the first embodiment, and the surface 3a on which the phosphor layer 4 is formed is a cylindrical concave surface. The other surface 3b is formed in a cylindrical convex shape.

  Since one surface 3a of the wheel plate 3 is a cylindrical concave surface, as shown in FIG. 8, the one surface 3a of the wheel plate 3 has a first along the generatrix direction (valley direction) of the surface 3a. There is a radius 3j1. Further, the one surface 3a of the wheel plate 3 has a second radius 3j2 and a third radius 3j3 orthogonal to the first radius 3j1. The second radius 3j2 and the third radius 3j3 are in a straight line, and the second radius 3j2 and the third radius 3j3 form a diameter. One surface 3a of the wheel plate 3 has a fourth radius 3j4 along the generatrix direction of the surface 3a. The first radius 3j1 and the fourth radius 3j4 are linear, and the first radius 3j1 and the fourth radius 3j4 form a diameter. Further, in the phosphor layer 4, the arc-shaped region 4e that straddles the first radius 3j1 along the circumferential direction and does not straddle the second radius 3j2, the third radius 3j3, and the fourth radius 3j4 is referred to as an irradiation region 4e. The arcuate region 4f that straddles the second radius 3j2, the third radius 3j3, and the fourth radius 3j4 along the circumferential direction and does not straddle the first radius 3j1 is referred to as a non-irradiation region 4b. The irradiation region 4e is a region extending in an arc shape in the circumferential direction around the first radius 3j1, and the non-irradiation region 4f is a region extending in an arc shape in the circumferential direction around the fourth radius 3j4. The combination of the region 4e and the non-irradiation region 4f is an annular region. The central angle of the irradiated region 4e is more than 0 ° and less than 180 °, the central angle of the non-irradiated region 4f is more than 180 ° and less than 360 °, and the sum of these is 360 °. For example, the central angle of the irradiation region 4a is 120 °, and the central angle of the non-irradiation region 4f is 240 °.

  The light source control unit 10 (see FIG. 2) controls the blinking cycle and lighting / extinguishing timing of the excitation light source 8 based on the rotational phase detected by the phase sensor 11. That is, the light source control unit 10 turns on the excitation light source 8 when the irradiation region 4 e of the phosphor layer 4 intersects the optical axis of the condensing optical system 9, and the non-irradiation region 4 f is the light of the condensing optical system 9. When crossing the axis, the excitation light source 8 is turned off.

  When the wheel plate 3 is rotating, the fluctuation range of the distance from the intersection of the optical axis of the condensing optical system 9 and the phosphor layer 4 to the condensing optical system 9 is small in the irradiation region 4e. Therefore, the spot diameter of the excitation light incident on the irradiation region 4e does not vary greatly. Therefore, uniform and uniform fluorescence is emitted regardless of the position where the excitation light enters the irradiation region 4e.

  The third embodiment and the first embodiment are the same except for the curve of the wheel plate 3 and the turn-on / off timing of the excitation light source 8.

  As shown in FIG. 9, the light source control unit 10 detects the second irradiation region when the first irradiation region 4 e 1 of the phosphor layer 4 passes through the optical axis of the condensing optical system 9 (the optical axis of the excitation light). The excitation light source 8 is turned on when 4e2 passes the optical axis of the condensing optical system 9 (the optical axis of the excitation light), and when the first non-irradiation region 4f1 passes the optical axis of the condensing optical system 9 and The excitation light source 8 may be turned off when the second non-irradiation region 4f2 passes through the optical axis of the condensing optical system 9. Here, the first irradiation region 4e1 is an arcuate region of the phosphor layer 4 that straddles the first radius 3j1 along the circumferential direction and does not straddle the second radius 3j2, the third radius 3j3, and the fourth radius 3j4. Say. The second irradiation region 4e2 refers to an arc-shaped region of the phosphor layer 4 that straddles the fourth radius 3j4 along the circumferential direction and does not straddle the first radius 3j1, the second radius 3j2, and the third radius 3j3. The first non-irradiation region 4f1 is an arcuate region of the phosphor layer 4 that straddles the second radius 3j2 along the circumferential direction and does not straddle the first radius 3j1, the third radius 3j3, and the fourth radius 3j4. . The second non-irradiated region 4f2 refers to an arc-shaped region of the phosphor layer 4 that straddles the third radius 3j3 along the circumferential direction and does not straddle the first radius 3j1, the second radius 3j2, and the fourth radius 3j4. . The first irradiation region 4e1 is a region that extends in an arc shape in the circumferential direction around the first radius 3j1, and the second irradiation region 4e2 is a region that extends in an arc shape in the circumferential direction around the fourth radius 3j4. The first non-irradiation region 4f1 is a region that extends in a circular arc shape around the second radius 3j2, and the second non-irradiation region 4f2 is a circular arc shape around the third radius 3j3 in the circumferential direction. It is an expanded area. The sum of the central angles of the irradiation regions 4e1 and 4e2 and the non-irradiation regions 4f1 and 4f2 is 360 °, and the combination of the irradiation regions 4e1 and 4e2 and the non-irradiation regions 4f1 and 4f2 is an annular region. For example, the central angles of the irradiation regions 4e1 and 4e2 are 60 °, and the central angles of the non-irradiation regions 4j1 and 4j2 are 120 °.

[Fourth Embodiment]
The fourth embodiment and the third embodiment are different in lighting / extinguishing timing of the excitation light source 8. The fourth embodiment and the third embodiment are the same except for the timing of turning on / off the excitation light source 8.

  Here, since one surface 3a of the wheel plate 3 is a cylindrical concave surface, as shown in FIG. 10, the one surface 3a of the wheel plate 3 is along the generatrix direction (valley direction) of the surface 3a. There are a first radius 3r1 and a second radius 3r2. The first radius 3r1 and the second radius 3r2 are in a straight line, and the first radius 3r1 and the second radius 3r2 form a diameter. The one surface 3a of the wheel plate 3 has a third radius 3r3 and a fourth radius 3r4 orthogonal to the first radius 3r1 and the second radius 3r2. The third radius 3r3 and the fourth radius 3r4 are in a straight line, and the third radius 3r3 and the fourth radius 3r4 form a diameter. Among the phosphor layers 4, an arcuate region 4g that straddles the third radius 3r3 along the circumferential direction and does not straddle the first radius 3r1, the second radius 3r2, and the fourth radius 3r4 is referred to as an irradiation region 4g. An arcuate region 4h that straddles the radius 3gr, the second radius 3r2, and the fourth radius 3r4 along the circumferential direction and does not straddle the third radius 3r3 is referred to as a non-irradiated region 4h. The irradiation region 4g is a region extending in an arc shape in the circumferential direction around the third radius 3r3, and the non-irradiation region 4h is a region extending in an arc shape in the circumferential direction around the fourth radius 3r4. The central angle of the irradiated region 4g is more than 0 ° and less than 180 °, the central angle of the non-irradiated region 4h is more than 180 ° and less than 360 °, and the sum of these is 360 °. For example, the central angle of the irradiated region 4g is 120 °, and the central angle of the non-irradiated region 4h is 240 °.

  The light source control unit 10 (see FIG. 2) controls the blinking cycle and lighting / extinguishing timing of the excitation light source 8 based on the rotational phase detected by the phase sensor 11. That is, the light source control unit 10 turns on the excitation light source 8 when the irradiation region 4g of the phosphor layer 4 intersects the optical axis of the condensing optical system 9, and the non-irradiation region 4h is the light of the condensing optical system 9. When crossing the axis, the excitation light source 8 is turned off.

  When the wheel plate 3 is rotating, the fluctuation range of the distance from the intersection of the optical axis of the condensing optical system 9 and the phosphor layer 4 to the condensing optical system 9 is small in the irradiation region 4g. Therefore, the spot diameter of the excitation light incident on the irradiation region 4g does not vary greatly. Therefore, uniform and uniform fluorescence is emitted regardless of the position where the excitation light enters the irradiation region 4g.

  As shown in FIG. 11, the light source control unit 10 includes the second irradiation region when the first irradiation region 4g1 of the phosphor layer 4 passes the optical axis of the condensing optical system 9 (the optical axis of the excitation light). When 4g2 passes through the optical axis of the condensing optical system 9 (the optical axis of the excitation light), the excitation light source 8 is turned on, and when the first non-irradiation region 4h1 passes through the optical axis of the condensing optical system 9, The excitation light source 8 may be turned off when the second non-irradiation region 4h2 passes through the optical axis of the condensing optical system 9. Here, the first irradiation region 4g1 is an arcuate region of the phosphor layer 4 that straddles the third radius 3r3 along the circumferential direction and does not straddle the first radius 3r1, the second radius 3r2, and the fourth radius 3r4. Say. The second irradiation region 4g2 refers to an arcuate region of the phosphor layer 4 that straddles the fourth radius 3r4 along the circumferential direction and does not straddle the first radius 3r1, the second radius 3r2, and the third radius 3r3. The first non-irradiation region 4h1 is an arcuate region of the phosphor layer 4 that straddles the first radius 3r1 along the circumferential direction and does not straddle the second radius 3r2, the third radius 3r3, and the fourth radius 3r4. . The second non-irradiated region 4h2 is an arcuate region of the phosphor layer 4 that straddles the second radius 3r2 along the circumferential direction and does not straddle the first radius 3r1, the third radius 3r3, and the fourth radius 3r4. . The first irradiation region 4g1 is a region that extends in a circular arc shape around the third radius 3r3, and the second irradiation region 4g2 is a region that extends in a circular arc shape around the fourth radius 3r4. The first non-irradiation region 4h1 is a region that extends in a circular arc shape around the first radius 3r1, and the second non-irradiation region 4h2 is a circular arc shape around the second radius 3r2 in the circumferential direction. It is an expanded area. The sum of the central angles of the irradiation regions 4g1, 4g2 and the non-irradiation regions 4h1, 4h2 is 360 °, and the combination of the irradiation regions 4g1, 4g2 and the non-irradiation regions 4h1, 4h2 becomes an annular region. For example, the central angles of the irradiation regions 4g1 and 4g2 are 60 °, and the central angles of the non-irradiation regions 4h1 and 4h2 are 120 °.

[Fifth Embodiment]
Next, with reference to FIG. 12 and FIG. 13, the time division light generation device 50 including the blinking light generation device 1 in any one of the first to fourth embodiments will be described, and the time division light generation device 50 will be described. The projector 100 provided will be described. FIG. 13 is a plan view mainly explaining the optical unit of the projector 100. FIG. 9 is a schematic block diagram showing the projector 100.

  As shown in FIGS. 12 and 13, the projector 100 includes a display element 40, a time-division light generator 50, a light source side optical system 80, a projection optical system 90, and the like.

  The time-division light generator 50 sequentially emits red light, green light, and blue light in time division. The time-division light generation device 50 generates the green light that is fluorescent light and blinks it, the first light source 52 that generates blue light, the second light source 53 that generates red light, The optical axis of the blue light emitted from the first light source 52, the optical axis of the red light emitted from the second light source 53, and the optical axis of the green light emitted from the blinking light generator 1 are overlapped, and these red light, green light And an optical system 70 for emitting blue light. Here, the light source control unit 10 of the blinking light generator 1 not only controls the blinking cycle and lighting / extinguishing timing of the excitation light source 8, but also the blinking cycle and lighting / extinguishing of the first light source 52 and the second light source 53. It also controls timing.

  As shown in FIG. 12, the excitation light source 8 of the blinking light generator 1 is arranged in a two-dimensional array and includes a plurality of laser diodes 8 a that emit blue laser excitation light.

The condensing optical system 9 of the blinking light generator 1 includes a plurality of collimating lenses 9a, a plurality of reflecting mirrors 9b, a lens group 9c, and a lens group 9d.
Collimating lenses 9a are respectively disposed facing the laser diodes 8a of the excitation light source 8, and the laser excitation light emitted from each laser diode 8a is collimated by the collimating lens 9a.

  The reflection mirror 9b is opposed to the laser diode 8a and the collimating lens 9a so as to be inclined with respect to the optical axis of the laser excitation light emitted from the laser diode 8a, and the optical axis of the laser excitation light collimated by the collimating lens 9a is reflected. 90 ° conversion is performed by the mirror 9b. These reflection mirrors 9b are arranged stepwise, the optical axis interval of the laser excitation light emitted from the laser diode 8a is narrowed by these reflection mirrors 9b, and the luminous flux group of the laser excitation light reflected by these reflection mirrors 9b occupies. The cross-sectional area becomes narrower than the cross-sectional area occupied by the light flux group of the laser excitation light before being reflected by the reflecting mirror 9b. The lens group 9c and the lens group 9d are arranged so that their optical axes are in a straight line. The optical axes of the lens group 9 c and the lens group 9 d are substantially orthogonal to the optical axis of the excitation light source 8. The lens group 9c and the lens group 9d converge the light flux group of the laser excitation light reflected by the plurality of reflection mirrors 9b on the phosphor layer 4 of the phosphor wheel 2, and combine the light flux group of the laser excitation light into one. Put together.

  The phosphor layer 4 emits green fluorescence by blue excitation light. The laser diode 8a emits ultraviolet light, and the phosphor layer 4 may emit green fluorescence by ultraviolet light.

The first light source 52 is a blue light emitting diode, and is arranged so that its optical axis is parallel to the optical axis of the excitation light source 8.
The second light source 53 is a red light emitting diode, and is arranged so that the optical axis thereof is parallel to the optical axes of the lens groups 9c and 9d.

  The optical system 70 includes a first dichroic mirror 71, a second dichroic mirror 72, a lens group 73, a lens 74, a lens group 75, and a lens 76.

  The lens group 73 is opposed to the first light source 52. The lens group 73 and the lens 74 are arranged so that their optical axes are in a straight line. The lens group 73 and the lens 74 are arranged so that their optical axes are orthogonal to the optical axes of the lens group 9c and the lens group 9d between the lens group 9c and the lens group 9d.

  The first dichroic mirror 71 is disposed between the lens group 73 and the lens 74 and between the lens group 9c and the lens group 9d. The first dichroic mirror 71 obliquely intersects with the optical axes of the lens groups 9c and 9d at 45 ° and obliquely intersects with the optical axes of the lens groups 73 and 74 at 45 °. The first dichroic mirror 71 transmits light in the blue wavelength band and reflects light in the green wavelength band.

  The lens group 75 is opposed to the second light source 53. The lens group 75 and the lens 76 are arranged so that their optical axes are in a straight line. The lens group 75 and the lens 76 are arranged so that their optical axes are orthogonal to the optical axes of the lens group 73 and the lens 74 on the opposite side of the first light source 52 with respect to the lens 74.

  The second dichroic mirror 72 is disposed between the lens group 75 and the lens 76 and is disposed on the opposite side of the first light source 52 with respect to the lens 74. The second dichroic mirror 72 obliquely intersects with the optical axes of the lens group 73 and the lens 74 at 45 ° and obliquely intersects with the optical axes of the lens group 75 and the lens 76 at 45 °. The second dichroic mirror 72 reflects light in the blue and green wavelength bands and transmits light in the red wavelength band.

  The light source control unit 10 shown in FIG. 13 also controls the blinking cycle and the turn-on / off timing of the excitation light source 8, the first light source 52, and the second light source 53 based on the rotational phase detected by the phase sensor 11. Specifically, the light source control unit 10 sequentially turns on the excitation light source 8, the first light source 52, and the second light source 53 in a time-sharing manner, and prevents them from being turned on at the same time. The light source 52 and the second light source 53 are blinked. Accordingly, when the excitation light source 8 is turned on, the first light source 52 and the second light source 53 are turned off. When the first light source 52 is turned on, the second light source 53 and the excitation light source 8 are turned off. When the light source 53 is turned on, the excitation light source 8 and the first light source 52 are turned off.

  When the excitation light source 8 is turned on and the first light source 52 and the second light source 53 are turned off, as shown in FIG. 12, the optical axis of the excitation light (blue light) emitted from the excitation light source 8 is 90 by the reflection mirror 9b. After being converted, the excitation light is reflected toward the lens group 9c. The excitation light reflected by the reflection mirror 9b passes through the lens group 9c, the first dichroic mirror 71, and the lens group 9d, and enters the irradiation region 4a, the irradiation region 4c, the irradiation region 4e, or the irradiation region 4g of the phosphor layer 4. . At this time, the excitation light emitted from the excitation light source 8 is condensed on the phosphor layer 4 by the reflection mirror 9b, the lens group 9c, and the lens group 9d. The green light emitted from the phosphor layer 4 by the irradiation of the excitation light passes through the lens group 9d. The optical axis of green light that has passed through the lens group 9 d is converted by 90 ° by the first dichroic mirror 71, and the green light is reflected toward the lens 74 by the first dichroic mirror 71. The green light reflected by the first dichroic mirror 71 passes through the lens 74. The optical axis of the green light is converted by 90 ° by the second dichroic mirror 72, the green light is reflected toward the lens 76 by the second dichroic mirror 72, and the reflected light passes through the lens 76. At this time, the green light emitted from the phosphor layer 4 is condensed on the light guide device 81 (described later in detail) by the lens group 9d, the lens 74, and the lens 76.

  When the first light source 52 is turned on and the second light source 53 and the excitation light source 8 are turned off, the blue light emitted from the first light source 52 passes through the lens group 73, the first dichroic mirror 71, and the lens 74. For this reason, the optical axis of the blue light transmitted through the first dichroic mirror 71 overlaps the optical axis of the green light reflected by the first dichroic mirror 71. The blue light that has passed through the lens 74 is reflected toward the lens 76 by the second dichroic mirror 72, and the reflected light passes through the lens 76. At this time, the blue light emitted from the first light source 52 is condensed on the light guide device 81 by the lens group 73, the lens 74, and the lens 76.

  When the second light source 53 is turned on and the excitation light source 8 and the first light source 52 are turned off, red light emitted from the second light source passes through the lens group 75, the second dichroic mirror 72, and the lens 76. For this reason, the optical axis of the red light transmitted through the second dichroic mirror 72 overlaps the optical axes of the green light and the blue light reflected by the second dichroic mirror 72. At this time, the red light emitted from the second light source 53 is condensed on the light guide device 81 by the lens group 75 and the lens 76.

  The color of light emitted from the first light source 52, the color of light emitted from the second light source 53, and the color of fluorescence emitted from the phosphor layer 4 are merely examples, and may be different colors. The color of excitation light emitted from the first light source 52, the color of light emitted from the second light source 53, and the color of fluorescence emitted from the phosphor layer 4 are the three primary colors of light, and are preferably different from each other.

  The light source side optical system 80 projects red light, green light, and blue light emitted from the time-division light generator 50 onto the display element 40. The light source side optical system 80 includes a light guide device 81, a lens 82, an optical axis conversion mirror 83, a condenser lens group 84, an irradiation mirror 85, and an irradiation lens 86.

  The light guide device 81 and the lens 82 are arranged so that their optical axes are aligned with the optical axis of the lens 76 of the time-division light generating device 50. The condensing lens group 84 is arranged so that its optical axis intersects the optical axis of the lens 82. The optical axis conversion mirror 83 is oblique to the optical axis at a position where the optical axis of the lens 82 and the optical axis of the condenser lens group 84 intersect. The light guide device 81 is a light tunnel or a light rod. The light guide device 81 reflects the red light, the green light, and the blue light emitted from the time-division light generation device 50 a plurality of times or totally reflects the red light, the green light, and the blue light on the side surface, thereby uniformly distributing the red light, the green light, and the blue light. Of luminous flux. The lens 82 projects and collects red light, green light, and blue light guided by the light guide device 81 toward the optical axis conversion mirror 83. The optical axis conversion mirror 83 reflects the red light, green light, and blue light projected by the lens 82 toward the condenser lens group 84. The condenser lens group 84 projects and collects red light, green light, and blue light reflected by the optical axis conversion mirror 83 toward the irradiation mirror 85. The irradiation mirror 85 reflects the light projected by the condenser lens group 84 toward the display element 40.

  The display element 40 modulates the red light, the green light, and the blue light irradiated by the irradiation mirror 85 of the light source side optical system 80 for each pixel (for each spatial light modulation element) according to the image data. Is a reflective spatial light modulator that forms Specifically, the display element 40 is a digital micromirror device (DMD) having a plurality of movable micromirrors arranged in a two-dimensional array.

  The display element 40 may be a transmissive spatial light modulator (for example, a liquid crystal shutter array panel: a so-called liquid crystal display) instead of the reflective spatial light modulator. In that case, the optical design of the light source side optical system 80 is changed so that the optical axes of red light, green light, and blue light irradiated by the light source side optical system 80 overlap with the optical axes of the projection optical system 90 described later. The display element 40 is disposed between the projection optical system 90 and the light source side optical system 80.

  The projection optical system 90 is provided so as to face the display element 40, and the optical axis of the projection optical system 90 extends back and forth to intersect the display element 40 (specifically, orthogonal). The projection optical system 90 projects light reflected by the display element 40 forward, and projects an image formed by the display element 40 onto a screen. The projection optical system 90 is a variable focus type lens that includes a movable lens group 91, a fixed lens group 92, and the like, and has a zoom function and a focus function. The projection optical system 90 can change the focal length and can be focused by moving the movable lens group 91 by a lens motor or the like.

  As shown in FIG. 9, the projector 100 includes a CPU 30, a main memory 31, a program memory 32, an operation / display unit 33, an input unit 34, an audio processing unit 35, a speaker 36, an image processing unit 37, a display driving unit 38, and a system. A bus 39 is further provided.

  The input unit 34 includes, for example, a pin jack (RCA) type video input terminal, a D-sub 15 type RGB input terminal, an HDMI (High-Definition Multimedia Interface) standard image / audio input terminal, and a USB (Universal Serial Bus) connector. A video signal and an audio signal are input from an external device having a wired connection.

Image signals of various standards input from the input unit 34 are input to the image processing unit 37 via the system bus 39.
The image processing unit 37 unifies the input image signal into an image signal of a predetermined format suitable for projection, appropriately writes the image signal in a built-in display buffer memory, and then reads out the written image signal for display driving. Send to part 38.

  The display driver 38 multiplies a frame rate according to a predetermined format, for example, 60 [frames / second], the number of color component divisions, and the number of display gradations according to the transmitted image signal. The display element 40 is driven by time-division driving. Specifically, when the display element 40 is irradiated with red light, the display drive circuit controls each movable micromirror (each spatial modulation element) of the display element 40 according to the image data (for example, PWM control). Thus, the time ratio (duty ratio) in which the red light is reflected toward the projection optical system 90 described later is controlled for each movable micromirror. As a result, a red image is formed by the display element 40. The same applies when the display element 40 is irradiated with green light or blue light. The operation of the display drive unit 38 and the operation of the display drive unit 38 are synchronized based on, for example, the rotational phase detected by the phase sensor 11.

  The operation / display unit 33 includes a remote control light receiving unit provided on the front and rear surfaces of the projector 100 and a key input / indicator unit provided on the upper surface of the housing. The operation / display unit 33 outputs to the CPU 30 a key operation signal based on a key operated by a user using a key input / indicator unit of the projector 100 main body or a remote controller dedicated to the projector 100.

  The sound processing unit 35 includes a sound source circuit such as a PCM sound source, converts the sound signal given during the projection operation into an analog signal, drives the speaker 36 to emit sound, or generates a beep sound or the like as necessary.

  The CPU 30 controls all the operations of the sound processing unit 35, the image processing unit 37, and the display driving unit 38. The CPU 30 is directly connected to the main memory 31 and the program memory 32. The main memory 31 is composed of DRAM and functions as a work memory for the CPU 30. The program memory 32 is configured by an electrically rewritable nonvolatile memory, and stores an operation program executed by the CPU 30 and various fixed data.

Although the embodiment of the present invention has been described above, the scope of the present invention is not limited to the above-described embodiment, but includes the scope of the invention described in the claims and the equivalent scope thereof.
The invention described in the scope of claims attached to the application of this application will be added below. The item numbers of the claims described in the appendix are as set forth in the claims attached to the application of this application.
[Appendix]
<Claim 1>
A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius The excitation light source is turned on when an arcuate irradiation region that does not cross a pair of second radius and third radius orthogonal to each other passes through the optical axis of the condensing optical system, and the first radius and An arc-shaped non-irradiation region that straddles the fourth radius, the second radius, and the third radius, which are just before, along the circumferential direction and does not cross the first radius passes through the optical axis of the condensing optical system. The flashing light generator is characterized in that the excitation light source is turned off when performing.
<Claim 2>
A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius When the arc-shaped first irradiation region that does not cross the pair of the second radius and the third radius orthogonal to each other passes through the optical axis of the condensing optical system, the first radius is linear with the first radius. The excitation light source is turned on when an arc-shaped second irradiation region that straddles four radii along the circumferential direction and does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the second radius in the circumferential direction and not across the first radius and the fourth radius passes through the optical axis of the condensing optical system, and the third radius An arc-shaped first non-irradiation region that straddles the first radius and the fourth radius across the circumferential direction is the optical axis of the condensing optical system Flashing light generator, characterized in that turns off the excitation light source as it passes through.
<Claim 3>
A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. The excitation light source is turned on when the arc-shaped irradiation region that does not straddle the first radius and the second radius passes through the optical axis of the condensing optical system. And the excitation light source is extinguished when an arc-shaped non-irradiation region that straddles the second radius in the circumferential direction and does not straddle the third radius passes through the optical axis of the condensing optical system. Flashing light generator.
<Claim 4>
A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. When the arc-shaped first irradiation region that crosses the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, it becomes linear with the third radius. The excitation light source is turned on when an arc-shaped second irradiation region that spans the fourth radius in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, When the arc-shaped first non-irradiation region that crosses the first radius in the circumferential direction and does not cross the third radius and the fourth radius passes through the optical axis of the condensing optical system, and the second radius An arc-shaped first non-irradiation region that extends in the circumferential direction and does not cross the third radius and the fourth radius is the condensing optical system. Flashing light generator, characterized in that turns off the excitation light source when passing through the optical axis.
<Claim 5>
A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius The excitation light source is turned on when an arcuate irradiation region that does not cross a pair of second radius and third radius orthogonal to each other passes through the optical axis of the condensing optical system, and the first radius and An arc-shaped non-irradiation region that straddles the fourth radius, the second radius, and the third radius, which are just before, along the circumferential direction and does not cross the first radius passes through the optical axis of the condensing optical system. The flashing light generator is characterized in that the excitation light source is turned off when performing.
<Claim 6>
A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius When the arc-shaped first irradiation region that does not cross the pair of the second radius and the third radius orthogonal to each other passes through the optical axis of the condensing optical system, the first radius is linear with the first radius. The excitation light source is turned on when an arc-shaped second irradiation region that straddles four radii along the circumferential direction and does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the second radius in the circumferential direction and not across the first radius and the fourth radius passes through the optical axis of the condensing optical system, and the third radius An arc-shaped first non-irradiation region that straddles the first radius and the fourth radius across the circumferential direction is the optical axis of the condensing optical system Flashing light generator, characterized in that turns off the excitation light source as it passes through.
<Claim 7>
A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. The excitation light source is turned on when the arc-shaped irradiation region that does not straddle the first radius and the second radius passes through the optical axis of the condensing optical system. And the excitation light source is extinguished when an arc-shaped non-irradiation region that straddles the second radius in the circumferential direction and does not straddle the third radius passes through the optical axis of the condensing optical system. Flashing light generator.
<Claim 8>
A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. When the arc-shaped first irradiation region that crosses the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, it becomes linear with the third radius. The excitation light source is turned on when an arc-shaped second irradiation region that spans the fourth radius in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, When the arc-shaped first non-irradiation region that crosses the first radius in the circumferential direction and does not cross the third radius and the fourth radius passes through the optical axis of the condensing optical system, and the second radius An arc-shaped first non-irradiation region that extends in the circumferential direction and does not cross the third radius and the fourth radius is the condensing optical system. Flashing light generator, characterized in that turns off the excitation light source when passing through the optical axis.
<Claim 9>
The blinking light generator according to any one of claims 1 to 8,
A first light source that emits light of a color different from the fluorescent color emitted from the phosphor layer;
A second light source that emits light of a color different from the color of fluorescence emitted from the phosphor layer and the emission color of the first light source;
An optical system for emitting the light by overlapping the optical axis of the fluorescence emitted from the phosphor layer, the optical axis of the light emitted from the first light source, and the optical axis of the light emitted from the second light source. And comprising
The time-division light generator, wherein the light source control unit sequentially turns on the excitation light source, the first light source, and the second light source in a time-sharing manner.
<Claim 10>
A time-division light generator according to claim 9;
A display element for forming an image by modulating light emitted from the optical system for each pixel;
A projector comprising: a projection optical system that projects an image formed by the display element.

DESCRIPTION OF SYMBOLS 1 Flashing light generator 2 Phosphor wheel 3 Wheel board 3a One surface 3b The other surface 3d1, 3g1, 3j1, 3r1 First radius 3d2, 3g2, 3j2, 3r2 Second radius 3d3, 3g3, 3j3, 3r3 Third radius 3d4, 3g4, 3j4, 3r4 Fourth radius 4 Phosphor layer 4a, 4c, 4e, 4g Irradiation region 4a1, 4c1, 4e1, 4g1 First irradiation region 4a2, 4c2, 4e2, 4g2 Second irradiation region 4b, 4d, 4f 4h Non-irradiation area 4b1, 4d1, 4f1, 4h1 First non-irradiation area 4b2, 4d2, 4f2, 4h2 Second non-irradiation area 6 Spindle motor (rotary drive)
8 Excitation light source 9 Condensing optical system 10 Light source controller 11 Phase sensor (phase detector)
40 Display Element 50 Time-Division Light Generator 70 Optical System 90 Projection Optical System 100 Projector

Claims (10)

A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius The excitation light source is turned on when an arcuate irradiation region that does not cross a pair of second radius and third radius orthogonal to each other passes through the optical axis of the condensing optical system, and the first radius and An arc-shaped non-irradiation region that crosses the fourth radius, the second radius, and the third radius along the circumferential direction along the circumferential direction and does not cross the first radius passes through the optical axis of the condensing optical system. The flashing light generator is characterized in that the excitation light source is turned off when performing. A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius When the arc-shaped first irradiation region that does not cross the pair of the second radius and the third radius orthogonal to each other passes through the optical axis of the condensing optical system, the first radius is linear with the first radius. The excitation light source is turned on when an arc-shaped second irradiation region that straddles four radii along the circumferential direction and does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the second radius in the circumferential direction and not across the first radius and the fourth radius passes through the optical axis of the condensing optical system, and the third radius the optical axis of the arcuate second non-irradiation region does not cross the first radius and the fourth radius crossing the circumferential direction the light converging optical system Flashing light generator, characterized in that turns off the excitation light source as it passes through. A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. The excitation light source is turned on when the arc-shaped irradiation region that does not straddle the first radius and the second radius passes through the optical axis of the condensing optical system. And the excitation light source is extinguished when an arc-shaped non-irradiation region that straddles the second radius in the circumferential direction and does not straddle the third radius passes through the optical axis of the condensing optical system. Flashing light generator. A rotary drive;
A wheel plate that is rotated by the rotary drive and is curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical convex shape, and the other surface is formed in a cylindrical concave shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. When the arc-shaped first irradiation region that crosses the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, it becomes linear with the third radius. The excitation light source is turned on when an arc-shaped second irradiation region that spans the fourth radius in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, When the arc-shaped first non-irradiation region that crosses the first radius in the circumferential direction and does not cross the third radius and the fourth radius passes through the optical axis of the condensing optical system, and the second radius arcuate second non-irradiation region is the light converging optical system which straddles the circumferential direction does not cross the third radius and the fourth radius Flashing light generator, characterized in that turns off the excitation light source when passing through the optical axis. A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius The excitation light source is turned on when an arcuate irradiation region that does not cross a pair of second radius and third radius orthogonal to each other passes through the optical axis of the condensing optical system, and the first radius and An arc-shaped non-irradiation region that crosses the fourth radius, the second radius, and the third radius along the circumferential direction along the circumferential direction and does not cross the first radius passes through the optical axis of the condensing optical system. The flashing light generator is characterized in that the excitation light source is turned off when performing. A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit straddles a first radius along the generatrix direction of the one surface of the wheel plate, along the circumferential direction, in the phosphor layer, during rotation of the wheel plate, and the first radius When the arc-shaped first irradiation region that does not cross the pair of the second radius and the third radius orthogonal to each other passes through the optical axis of the condensing optical system, the first radius is linear with the first radius. The excitation light source is turned on when an arc-shaped second irradiation region that straddles four radii along the circumferential direction and does not cross the second radius and the third radius passes through the optical axis of the condensing optical system. The arc-shaped first non-irradiation region straddling the second radius in the circumferential direction and not across the first radius and the fourth radius passes through the optical axis of the condensing optical system, and the third radius the optical axis of the arcuate second non-irradiation region does not cross the first radius and the fourth radius crossing the circumferential direction the light converging optical system Flashing light generator, characterized in that turns off the excitation light source as it passes through. A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. The excitation light source is turned on when the arc-shaped irradiation region that does not straddle the first radius and the second radius passes through the optical axis of the condensing optical system. And the excitation light source is extinguished when an arc-shaped non-irradiation region that straddles the second radius in the circumferential direction and does not straddle the third radius passes through the optical axis of the condensing optical system. Flashing light generator. A rotary drive;
A wheel plate that is rotated by the rotation driver and curved in a cylindrical shape, one of the two surfaces is formed in a cylindrical concave shape, and the other surface is formed in a cylindrical convex shape;
A phosphor layer formed on the one surface of the wheel plate;
An excitation light source that emits excitation light;
A condensing optical system for condensing the excitation light emitted from the excitation light source on the phosphor layer;
A phase detector for detecting the rotational phase of the wheel plate;
A light source controller that blinks the excitation light source based on the rotational phase detected by the phase detector;
The light source control unit includes a third radius orthogonal to the pair of first and second radii along the generatrix direction of the one surface of the wheel plate in the phosphor layer during rotation of the wheel plate. When the arc-shaped first irradiation region that crosses the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, it becomes linear with the third radius. The excitation light source is turned on when an arc-shaped second irradiation region that spans the fourth radius in the circumferential direction and does not cross the first radius and the second radius passes through the optical axis of the condensing optical system, When the arc-shaped first non-irradiation region that crosses the first radius in the circumferential direction and does not cross the third radius and the fourth radius passes through the optical axis of the condensing optical system, and the second radius arcuate second non-irradiation region is the light converging optical system which straddles the circumferential direction does not cross the third radius and the fourth radius Flashing light generator, characterized in that turns off the excitation light source when passing through the optical axis. The blinking light generator according to any one of claims 1 to 8,
A first light source that emits light of a color different from the fluorescent color emitted from the phosphor layer;
A second light source that emits light of a color different from the color of fluorescence emitted from the phosphor layer and the emission color of the first light source;
An optical system for emitting the light by overlapping the optical axis of the fluorescence emitted from the phosphor layer, the optical axis of the light emitted from the first light source, and the optical axis of the light emitted from the second light source. And comprising
The time-division light generator, wherein the light source control unit sequentially turns on the excitation light source, the first light source, and the second light source in a time-sharing manner. A time-division light generator according to claim 9;
A display element for forming an image by modulating light emitted from the optical system for each pixel;
A projector comprising: a projection optical system that projects an image formed by the display element.

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