Abstract: A phosphor wheel includes a disc-shaped substrate and a phosphor ring fixedly bonded to the substrate. At least three cut-out sections or openings are formed on a rim of the substrate. The shortest length from the center of the substrate to inner edges of the cut-out sections or inner edges of the openings is generally equal to a radius of an outer circumference of the phosphor ring.

Abstract: A lighting device of the present disclosure includes: an excitation light source; a phosphor for receiving an excitation light from the excitation light source and emitting a fluorescent light; a spreader for supporting the phosphor; and a reflective layer disposed between the phosphor and the spreader and reflecting the fluorescent light. The phosphor is a plurality of phosphor pieces disposed to be adjacent to each other and having the same characteristic.

Abstract: A projection-type image display apparatus of the present disclosure includes a fluorescent substance, a blue-color laser diode excitation optical system, a DMD, a projection optical system, a polarizing plate, and a depolarizing plate. The fluorescent substance has characteristics of emitting predetermined fluorescence in response to excitation light. The blue-color laser diode has a semiconductor laser that emits laser light of a wavelength with which the fluorescent substance is excited. The excitation optical system condenses light from the blue-color laser diode. The DMD is controllable by a signal from an external source. The projection optical system is an optical system that can enlarge and project an image displayed by the DMD. The polarizing plate is disposed on the output side of the projection optical system.

Abstract: A phosphor wheel module includes a substrate and a phosphor region disposed on a surface of the substrate. The phosphor region includes a phosphor that is disposed on at least a part of a circumference of a circle with a first radius from a rotation center of the substrate. The substrate includes a ventilation region and a heat conduction region. The ventilation region includes a plurality of openings that is located closer to the rotation center of the substrate than the phosphor region. The heat conduction region is located farther away from the rotation center of the substrate than the phosphor region.

Abstract: A disk-shaped substrate made of a heat conductive material is provided with, along an outer periphery of one surface of the substrate, a ring-shaped phosphor that emits light by irradiation with blue laser light that is excitation light. The substrate is provided with, on another surface of the substrate, a plurality of convex portions dotting a region corresponding to a region provided with the phosphor. In a phosphor wheel, the substrate is driven by a motor to rotate about an axis of rotation.

Abstract: A cooling device cools down a wheel having a disc shape. The wheel is hermetically enclosed in an enclosure and rotationally driven about a rotation shaft. The cooling device includes blade members that are disposed on one surface of the wheel, a heat dissipater to which a gas heated by the wheel is blown by the blade members due to rotation of the wheel, and a gas flow definer that is located inside the enclosure, and separates a flow path along which the gas that has been cooled by the heat dissipater flows before being blown to the one surface and a flow path along which the gas that has been blown to the one surface and heated flows.

Abstract: A phosphor wheel includes: a substrate; a light reflection layer disposed on one surface of the substrate; a phosphor layer; and a bonding layer which is located between and bonds the light reflection layer and the phosphor layer, wherein the bonding layer contains a particle which is higher in thermal conductivity than a base material of the bonding layer and higher in light reflectance than the light reflection layer.

Abstract: A phosphor wheel includes a disc-shaped substrate and a phosphor ring fixedly bonded to the substrate. At least three cut-out sections or openings are formed on a rim of the substrate. The shortest length from the center of the substrate to inner edges of the cut-out sections or inner edges of the openings is generally equal to a radius of an outer circumference of the phosphor ring.

Abstract: A phosphor wheel includes: a substrate; a light reflection layer disposed on one surface of the substrate; a phosphor layer; and a bonding layer which is located between and bonds the light reflection layer and the phosphor layer, wherein the bonding layer contains a particle which is higher in thermal conductivity than a base material of the bonding layer and higher in light reflectance than the light reflection layer.

Abstract: A cooling device cools down a wheel having a disc shape. The wheel is hermetically enclosed in an enclosure and rotationally driven about a rotation shaft. The cooling device includes blade members that are disposed on one surface of the wheel, a heat dissipater to which a gas heated by the wheel is blown by the blade members due to rotation of the wheel, and a gas flow definer that is located inside the enclosure, and separates a flow path along which the gas that has been cooled by the heat dissipater flows before being blown to the one surface and a flow path along which the gas that has been blown to the one surface and heated flows.

Abstract: A disk-shaped substrate made of a heat conductive material is provided with, along an outer periphery of one surface of the substrate, a ring-shaped phosphor that emits light by irradiation with blue laser light that is excitation light. The substrate is provided with, on another surface of the substrate, a plurality of convex portions dotting a region corresponding to a region provided with the phosphor. In a phosphor wheel, the substrate is driven by a motor to rotate about an axis of rotation.

Abstract: A phosphor wheel device includes: a phosphor wheel; a motor; and a plurality of blades. The phosphor wheel has: a disc-shaped substrate; and a phosphor disposed on one surface of the substrate in a circumferential direction. The motor rotatably drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, and extend in a radial direction of the phosphor wheel from an axis of rotation of the motor.

Abstract: A projection-type image display apparatus of the present disclosure includes a fluorescent substance, a blue-color laser diode excitation optical system, a DMD, a projection optical system, a polarizing plate, and a depolarizing plate. The fluorescent substance has characteristics of emitting predetermined fluorescence in response to excitation light. The blue-color laser diode has a semiconductor laser that emits laser light of a wavelength with which the fluorescent substance is excited. The excitation optical system condenses light from the blue-color laser diode. The DMD is controllable by a signal from an external source. The projection optical system is an optical system that can enlarge and project an image displayed by the DMD. The polarizing plate is disposed on the output side of the projection optical system.

Abstract: A phosphor wheel device includes: a phosphor wheel; a motor; and a plurality of blades. The phosphor wheel has: a disc-shaped substrate; and a phosphor disposed on one surface of the substrate in a circumferential direction. The motor rotatably drives the phosphor wheel. The plurality of blades are fixed to the other surface of the substrate so as to be integrally rotated with the phosphor wheel, and extend in a radial direction of the phosphor wheel from an axis of rotation of the motor.

Abstract: A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.

Abstract: The shield includes: a first dust-proof wall that is shiftable integrally with the projection lens, and has width a1 projecting from the projection lens to an A side; and a second dust-proof wall that is slidable within a range regulated by the regulator, and has length b1 on the A side. When the second dust-proof wall has length c2 shiftable to a B side, the projection lens and the second dust-proof wall form a space having length d1 on the A side, and the projection lens and the frame form a space having length e1 on the A side, a1?d1, b1?e1?d1, and b1+d1?e1?c2 are satisfied.

Abstract: A lighting device configured to output light of predetermined color includes: a plurality of solid-state light sources including at least a first solid-state light source and a second solid-state light source; a drive section configured to drive each of the plurality of solid-state light sources individually; a first phosphor for excitation by first emission light emitted from the first solid-state light source; and a second phosphor for excitation by second emission light emitted from the second solid-state light source, and first fluorescence and second fluorescence are of different color.

Abstract: A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.

Abstract: A control device includes an apparatus controller that is connected to at least one apparatus and includes a first memory which stores data for controlling the driving of the apparatus and data indicating a state of the apparatus and a reading and transmitting unit which reads each data item stored in the first memory and transmits the read data, a main controller that includes a central processing unit, a second memory, and a writing unit which writes the data transmitted from the apparatus controller to the second memory, and a full-duplex serial bus that connects the main controller and the apparatus controller. The reading and transmitting unit and the writing unit operate such that each data item stored in the first memory is read, transmitted, and stored in the second memory in a cycle equal to or less than a count cycle of a system timer.

Abstract: The shield includes: a first dust-proof wall that is shiftable integrally with the projection lens, and has width a1 projecting from the projection lens to an A side; and a second dust-proof wall that is slidable within a range regulated by the regulator, and has length b1 on the A side. When the second dust-proof wall has length c2 shiftable to a B side, the projection lens and the second dust-proof wall form a space having length d1 on the A side, and the projection lens and the frame form a space having length e1 on the A side, a1?d1, b1?e1?d1, and b1+d1?e1?c2 are satisfied.