Light source control device, projector, and light source control method

摘要

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.

主权项

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.