Abstract: A projector includes a light source that emits excitation light, a fluorescent body that converts the excitation light into fluorescence, a liquid crystal optical modulation device that modulates light output from the fluorescent body, an optical sensor that detects at least one of the excitation light passing through the fluorescent body and the fluorescence converted by the fluorescent body, and a control device that controls at least one of the light source and the liquid crystal optical modulation device based on a detection result of the optical sensor.

Abstract: A projector includes a light source that emits excitation light, a fluorescent body that converts the excitation light into fluorescence, a liquid crystal optical modulation device that modulates light output from the fluorescent body, an optical sensor that detects at least one of the excitation light passing through the fluorescent body and the fluorescence converted by the fluorescent body, and a control device that controls at least one of the light source and the liquid crystal optical modulation device based on a detection result of the optical sensor.

Abstract: A projector includes a light source that emits excitation light, a fluorescent body that converts the excitation light into fluorescence, a liquid crystal optical modulation device that modulates light output from the fluorescent body, an optical sensor that detects at least one of the excitation light passing through the fluorescent body and the fluorescence converted by the fluorescent body, and a control device that controls at least one of the light source and the liquid crystal optical modulation device based on a detection result of the optical sensor.

Abstract: A light source control device is for controlling a solid-state light source array having a plurality of solid-state light sources connected in series to each other, and includes a detector (a current detection resistor, voltage detection resistors, and operational amplifiers) adapted to detect at least one of a voltage applied to the solid-state light source array and a current supplied to the solid-state light source array, and a control circuit adapted to determine whether or not discontinuity of at least one of the voltage and the current is present using a detection result of the detector, and change control of one of the current and electrical power performed on the solid-state light source array if it is determined that the discontinuity is present.

Abstract: A projection-type display device according to an embodiment of the invention modulates light emitted from a solid-state light source array and projects the modulated light on a screen. The projection-type display device includes a power source device that generates power used for driving the solid-state light source array using power supplied from a power source, an instant interruption detecting circuit that detects an instant interruption of the power source, and a control device that, in a case where the instant interruption of the power source is detected by the instant interruption detecting circuit, performs control of extinguishing the solid-state light source array during at least a part of an instant interruption period until recovery after the detection of the instant interruption of the power source.

Abstract: A lighting device which lights the discharge lamp, includes: a converting circuit which converts the direct current into an alternating current; a pulse generating circuit which generates a high voltage pulse; and a trigger circuit which causes the pulse generating circuit to generate the high voltage pulse, wherein the pulse generating circuit includes a primary winding and a secondary winding and generates the high voltage pulse by increasing a current input to the secondary winding based on a current input to the primary winding, and the trigger circuit includes a high pass filter; a first capacitor which stores and discharges charges input via the high pass filter; and a third switching element which outputs an output current from a second capacitor connected in parallel to the converting circuit to the primary winding if an output voltage from the first capacitor exceeds a threshold.

Abstract: A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp includes: a pulse generating circuit which produces a high-voltage pulse and applies the high-voltage pulse to the electrode; wherein the pulse generating circuit includes an inductor whose output end is connected with the electrode, and a capacitor connected with the output end of the inductor to produce free oscillation of current applied to the electrode in cooperation with the inductor.

Abstract: A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp, includes: a converting circuit which converts inputted direct current into alternating current; a pulse generating circuit which produces a high-voltage pulse from the alternating current received from the converting circuit and applies the high-voltage pulse to the electrode; and a trigger circuit which is disposed between the converting circuit and causes the pulse generating circuit to apply the high-voltage pulse to the electrode, wherein the trigger circuit allows the pulse generating circuit to apply the high-voltage pulse to the electrode in accordance with a drive frequency of the converting circuit.

Abstract: A light source control device is for controlling a solid-state light source array having a plurality of solid-state light sources connected in series to each other, and includes a detector (a current detection resistor, voltage detection resistors, and operational amplifiers) adapted to detect at least one of a voltage applied to the solid-state light source array and a current supplied to the solid-state light source array, and a control circuit adapted to determine whether or not discontinuity of at least one of the voltage and the current is present using a detection result of the detector, and change control of one of the current and electrical power performed on the solid-state light source array if it is determined that the discontinuity is present.

Abstract: A projector includes: a light source that emits excitation light; a fluorescent body that converts the excitation light into fluorescence; a liquid crystal optical modulation device that modulates light output from the fluorescent body; an optical sensor that detects at least one of the excitation light passing through the fluorescent body and the fluorescence converted by the fluorescent body; and a control device that controls at least one of the light source and the liquid crystal optical modulation device based on a detection result of the optical sensor.

Abstract: A projection-type display device according to an embodiment of the invention modulates light emitted from a solid-state light source array and projects the modulated light on a screen. The projection-type display device includes a power source device that generates power used for driving the solid-state light source array using power supplied from a power source, an instant interruption detecting circuit that detects an instant interruption of the power source, and a control device that, in a case where the instant interruption of the power source is detected by the instant interruption detecting circuit, performs control of extinguishing the solid-state light source array during at least a part of an instant interruption period until recovery after the detection of the instant interruption of the power source.

Abstract: A lighting device which lights the discharge lamp, includes: a converting circuit which converts the direct current into an alternating current; a pulse generating circuit which generates a high voltage pulse; and a trigger circuit which causes the pulse generating circuit to generate the high voltage pulse, wherein the pulse generating circuit includes a primary winding and a secondary winding and generates the high voltage pulse by increasing a current input to the secondary winding based on a current input to the primary winding, and the trigger circuit includes a high pass filter; a first capacitor which stores and discharges charges input via the high pass filter; and a third switching element which outputs an output current from a second capacitor connected in parallel to the converting circuit to the primary winding if an output voltage from the first capacitor exceeds a threshold.

Abstract: A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp, includes: a converting circuit which converts inputted direct current into alternating current; a pulse generating circuit which produces a high-voltage pulse from the alternating current received from the converting circuit and applies the high-voltage pulse to the electrode; and a trigger circuit which is disposed between the converting circuit and causes the pulse generating circuit to apply the high-voltage pulse to the electrode, wherein the trigger circuit allows the pulse generating circuit to apply the high-voltage pulse to the electrode in accordance with a drive frequency of the converting circuit.

Abstract: A lighting device which supplies power to an electrode of a discharge lamp to turn on the discharge lamp includes: a pulse generating circuit which produces a high-voltage pulse and applies the high-voltage pulse to the electrode; wherein the pulse generating circuit includes an inductor whose output end is connected with the electrode, and a capacitor connected with the output end of the inductor to produce free oscillation of current applied to the electrode in cooperation with the inductor.

Abstract: A switching power supply includes: a coil; and a pedestal fixed to the coil, the pedestal includes a supporting member configured to support the coil in such a manner as to form a space through which air flows on a surface of the coil attached to the pedestal.

Abstract: A switching power supply includes: a coil; and a pedestal fixed to the coil, the pedestal includes a supporting member configured to support the coil in such a manner as to form a space through which air flows on a surface of the coil attached to the pedestal.

Abstract: A projection lens (46) is located at an end of an optical unit (4) of approximately planarly-viewed L-shape, the projection lens enlarging and projecting a color image combined by a cross dichroic prism of an optical device body and including a linearly-advancing barrel (46B) fixed to a head (49) formed on an optical component casing, a cam barrel (46C) provided with a lever (46A), zoom-magnification converting lenses, focus-adjusting lenses and fixed lens, the linearly-advancing barrel (46B) and the cam barrel (46C) being made of polycarbonate, where a control board is disposed above a projection lens (46) to planarly cover the projection lens (46).

Abstract: A projection lens (46) is located at an end of an optical unit (4) of approximately planarly-viewed L-shape, the projection lens enlarging and projecting a color image combined by a cross dichroic prism of an optical device body and including a linearly-advancing barrel (46B) fixed to a head (49) formed on an optical component casing, a cam barrel (46C) provided with a lever (46A), zoom-magnification converting lenses, focus-adjusting lenses and fixed lens, the linearly-advancing barrel (46B) and the cam barrel (46C) being made of polycarbonate, where a control board is disposed above a projection lens (46) to planarly cover the projection lens (46).