Light source device, control method therefor, lighting device, monitor device, and image display device

A control method of a light source device, comprising:

• (a) emitting a laser beam;
• (b) pulse-driving the laser beam;
• (c) converting a wavelength of a laser beam into a predetermined wavelength;
• (d) detecting an intensity of the laser beam emitted in step (c);
• and
• (e) controlling a drive condition of the laser beam emitted in step (c) based on the intensity detected in step (d),
• wherein step (e) includes
• (f) controlling, in response to the intensity detected in step (d) in a present pulse drive condition being outside a predetermined range, a drive condition of the laser beam to extract an optimum pulse drive condition, and sets the extracted optimum pulse drive condition to the drive condition of the laser beam instead of the present pulse drive condition, and
• step (f) includes
• (g) restoring, in extracting the optimum drive condition, the present pulse drive condition in a predetermined period of time after replacing the present pulse drive condition with a predetermined pulse drive condition for extracting the optimum pulse drive condition.

A light source device comprising:

• a light source that emits light, the light having at least one wavelength;
• a power supply that supplies power to the light source;
• a wavelength conversion unit that converts the at least one wavelength of the light emitted from the light source to a predetermined wavelength, the wavelength conversion unit comprising at least one light incident side and at least one light emitting side, wherein at least a portion of the light emitted from the light source enters the wavelength conversion unit through the at least one light incident side and converted light having the predetermined wavelength exits the wavelength conversion unit through the at least one light emitting side;
• and
• a control unit that controls at least one variable affecting the light being emitted from the light source, such that the control unit optimizes an operating condition of the light source to ensure that the wavelength conversion unit operates at a substantially optimal condition.