Light source control device, projector, and light source control method
First Claim
1. A light source control device adapted to control a light source device having a plurality of solid-state light sources, the light source control device comprising:
- a determination section adapted to determine a duty ratio, which is a ratio between an emission time period and an extinction time period of the solid-state light sources in a control period of the light source device, based on an information representing a target light intensity, which is a light intensity of light required to be emitted from the light source device;
a drive control section adapted to generate a control signal having the duty ratio determined by the determination section, and adapted to make a phase with which at least one of the solid-state light sources is driven different from a phase with which another of the solid-state light sources is driven, thereby performing drive control of the plurality of solid-state light sources; and
a current control section adapted to control a current supplied to the solid-state light sources in accordance with the target light intensity and the duty ratio determined by the determination section,wherein the current control section has a second table representing a relationship between the light intensity of the light emitted from the light source device, the duty ratio, and the current supplied to the solid-state light sources, and supplies the solid-state light sources with the current corresponding to the target light intensity and the duty ratio using the second table.
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Accused Products
Abstract
A light source control device and a light source control method each capable of preventing the scroll noise from occurring without being affected by the characteristics of a light modulation device, and a projector equipped with the light source control device are provided. The light source device includes a duty determination section adapted to determine a duty ratio, and a drive control section adapted to perform drive control of a plurality of solid-state light sources by generating a PWM signal having the duty ratio determined by the duty ratio determination section, and adapted to make a phase with which at least one of the solid-state light sources is driven different from a phase with which another of the solid-state light sources is driven.
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Citations
10 Claims
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1. A light source control device adapted to control a light source device having a plurality of solid-state light sources, the light source control device comprising:
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a determination section adapted to determine a duty ratio, which is a ratio between an emission time period and an extinction time period of the solid-state light sources in a control period of the light source device, based on an information representing a target light intensity, which is a light intensity of light required to be emitted from the light source device; a drive control section adapted to generate a control signal having the duty ratio determined by the determination section, and adapted to make a phase with which at least one of the solid-state light sources is driven different from a phase with which another of the solid-state light sources is driven, thereby performing drive control of the plurality of solid-state light sources; and a current control section adapted to control a current supplied to the solid-state light sources in accordance with the target light intensity and the duty ratio determined by the determination section, wherein the current control section has a second table representing a relationship between the light intensity of the light emitted from the light source device, the duty ratio, and the current supplied to the solid-state light sources, and supplies the solid-state light sources with the current corresponding to the target light intensity and the duty ratio using the second table. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9)
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10. A light source control method of controlling a light source device having a plurality of solid-state light sources, the method comprising:
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determining a duty ratio, which is a ratio between an emission time period and an extinction time period of the solid-state light sources in a control period of the light source device, based on an information representing a target light intensity, which is a light intensity of light required to be emitted from the light source device; performing drive control of the plurality of solid-state light sources by generating a control signal having the duty ratio determined in the determining, and adapted to make a phase with which at least one of the solid-state light sources is driven different from a phase with which another of the solid-state light sources is driven; a current control section adapted to control a current supplied to the solid-state light sources in accordance with the target light intensity and the duty ratio determined by the determination section, wherein the current control section has a second table representing a relationship between the light intensity of the light emitted from the light source device, the duty ratio, and the current supplied to the solid-state light sources, and supplies the solid-state light sources with the current corresponding to the target light intensity and the duty ratio using the second table.
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Specification