Light source driving method and projector
View Patent ↗An object of the invention is to provide a light source driving method for supplying electric power to a light source of a projector, and to provide a projector using this light source driving method. The projector has a lamp ( 2 ) as a light source for emitting light, a lamp driving electric power control section ( 3 ) as a light source driving section for supplying electric power for operating the lamp ( 2 ), an image pickup section ( 7 ) as an image obtaining section for receiving a projected image and obtaining image data to adjust the projected image, and a synchronous signal generating section ( 5 ) for generating a signal as an operation reference. The synchronous signal generating section ( 5 ) generates a first operation signal for determining operation timing of an electric current output of the lamp driving electric power control section ( 3 ), and a second operation signal for determining operation timing for receiving the projected image and obtaining the image data by the image pickup section ( 7 ), and the lamp driving electric power control section ( 3 ) and the image pickup section ( 7 ) are synchronously operated.
1. A light source driving method for a projector that projects an image, comprising:
generating, via a synchronous signal generating process, a signal as an operation reference signal;
generating a first synchronous signal to determine operation timing of an electric current output of a light source;
generating a second operation signal to determine operation timing for receiving the projected image;
obtaining image data, to adjust the projected image, in a period of the same driving waveform in synchronization with the control of the driving waveform for supplying electric power to the light source; and
changing an electric current while lighting the light source after obtaining the image data.
2. The light source driving method of the projector according to claim 1 ,
the projector including a light source driving section for supplying the electric power for operating the light source, and an image obtaining section for receiving the projected image and obtaining the image data to adjust the projected image;
the method further comprising operating the light source driving section and the image obtaining section in synchronization with the signal generated in the synchronous signal generating process.
3. A projector for projecting an image, comprising:
a light source that emits light;
a light source driving section that supplies electric power to operate the light source;
an image obtaining section that receives the projected image and obtains the image data to adjust the projected image; and
a synchronous signal generating section that generates a signal as an operation reference,
the synchronous signal generating section generating a first operation signal to determine operation timing of an electric current output of the light source driving section, and a second operation signal to determine operation timing for receiving the projected image and obtaining the image data by the image obtaining section,
the light source driving section and the image obtaining section being synchronously operated,
the image obtaining section obtaining the image data in a period of the same driving waveform in synchronization with the control of the driving waveform for supplying the electric power to the light source, and
the light source driving section changing an electric current while lighting the light source after the image obtaining section obtains the image data.
4. The projector according to claim 3 , further comprising:
a controller that synchronizes the control of the driving waveform for supplying electric power to the light source with control of receiving the projected image and obtaining the image data to adjust the projected image.