Image drawing device and image drawing method that detects and controls laser light

1. An image drawing device comprising:

a laser light source unit configured to output laser light;

a scanner configured to scan the laser light output from the laser light source unit by reflecting the laser light;

a laser light source controller configured to control a laser light output timing of the laser light source unit and an output value of the laser light so that a drawing image based on input image data is generated by scanning of the scanner in a scanning region scanned by the scanner, and controls the laser light source unit to output characteristic detection laser light for detecting the output value of the laser light output from the laser light source unit;

a scanner controller configured to control scanning of the scanner so that the scanner scans the laser light with a predetermined amplitude; and

a characteristic detection controller configured to control the scanner controller so that the scanner performs scanning in a range in which an amplitude of scanning of the scanner exceeds a scanning range corresponding to the predetermined amplitude when an output value of the laser light output from the laser light source unit is adjusted, control the laser light source controller to output the characteristic detection laser light during scanning in a region which is outside of a region in which the drawing image is generated and beyond the scanning range corresponding to the predetermined amplitude, and adjust the output value of the laser light based on a detection result of the output value of the characteristic detection laser light,

wherein the characteristic detection controller controls the laser light source controller so that a drawing image based on image data indicating a single hue corresponding to an average hue of the input image data and a single luminance corresponding to an average luminance of the input image data is generated, instead of the drawing image based on the input image data, when the scanner is scanned with an amplitude extended from the predetermined amplitude.

2. The image drawing device according to claim 1 , wherein the characteristic detection controller controls the scanner controller to perform scanning in a range beyond the scanning range corresponding to the predetermined amplitude by performing scanning with the extended amplitude from the predetermined amplitude, when the output value of the laser light output from the laser light source unit is adjusted.

3. The image drawing device according to claim 2 , wherein the characteristic detection controller controls the laser light source controller so that the drawing image has a uniform size based on a ratio of the predetermined amplitude to the extended amplitude when the scanner is scanned with the extended amplitude.

4. The image drawing device according to claim 1 , wherein the characteristic detection controller controls the scanner controller to perform scanning in a range beyond the scanning range corresponding to the predetermined amplitude by temporarily performing scanning with the extended amplitude from the predetermined amplitude, when the output value of the laser light output from the laser light source unit is adjusted.

5. The image drawing device according to claim 4 , wherein

the scanner controller controls scanning of the scanner so that the scanner performs scanning with a predetermined amplitude in a first scanning direction and a second scanning direction, the first scanning direction corresponding to a vertical direction of the drawing image, the second scanning direction corresponding to a horizontal direction of the drawing image, and

the characteristic detection controller controls the scanner controller so that the scanner temporarily performs scanning in the first scanning direction with the extended amplitude from the predetermined amplitude, when the output value of the laser light output from the laser light source unit is adjusted.

6. The image drawing device according to claim 4 , wherein

the scanner controller controls scanning of the scanner so that the scanner performs scanning with a predetermined amplitude in a first scanning direction and a second scanning direction, the first scanning direction corresponding to a vertical direction of the drawing image, the second scanning direction corresponding to a horizontal direction of the drawing image, and

the characteristic detection controller controls the scanner controller so that the scanner temporarily performs scanning in the second scanning direction with the extended amplitude from the predetermined amplitude, when the output value of the laser light output from the laser light source unit is adjusted.

7. The image drawing device according to claim 1 , wherein

the scanner controller controls the scanner to perform scanning with a predetermined scanning center as a scanning center, and

the characteristic detection controller controls the scanner controller to perform scanning in a range beyond the scanning range corresponding to the predetermined amplitude by shifting the scanning center of the scanner from the predetermined scanning center, when the output value of the laser light output from the laser light source unit is adjusted.

8. An image drawing device comprising,

a laser light source unit configured to output laser light;

a scanner configured to scan the laser light output from the laser light source unit by reflecting the laser light;

a laser light source controller configured to control a laser light output timing of the laser light source unit and an output value of the laser light so that a drawing image based on input image data is generated by scanning of the scanner in a scanning region scanned by the scanner, and controls the laser light source unit to output characteristic detection laser light for detecting the output value of the laser light output from the laser light source unit;

a scanner controller configured to control scanning of the scanner so that the scanner scans the laser light with a predetermined amplitude; and

a characteristic detection controller configured to control the scanner controller so that the scanner performs scanning in a range in which an amplitude of scanning of the scanner exceeds a scanning range corresponding to the predetermined amplitude when an output value of the laser light output from the laser light source unit is adjusted, control the laser light source controller to output the characteristic detection laser light during scanning in a region which is outside of a region in which the drawing image is generated and beyond the scanning range corresponding to the predetermined amplitude, and adjust the output value of the laser light based on a detection result of the output value of the characteristic detection laser light,

wherein the scanner controller controls the scanner to perform scanning with a predetermined scanning center as a scanning center,

the characteristic detection controller controls the scanner controller to perform scanning in a range beyond the scanning range corresponding to the predetermined amplitude by shifting the scanning center of the scanner from the predetermined scanning center, when the output value of the laser light output from the laser light source unit is adjusted, and

when the scanner performs scanning with a scanning center shifted from the predetermined scanning center as a scanning center, the characteristic detection controller controls the laser light source controller so that a position of a drawing image drawn when scanning is performed with the predetermined scanning center as the scanning center matches a position of a drawing image drawn when scanning is performed with a scanning center shifted from the predetermined scanning center as the scanning center.

9. An image drawing device comprising,

a laser light source unit configured to output laser light;

a scanner configured to scan the laser light output from the laser light source unit by reflecting the laser light;

a laser light source controller configured to control a laser light output timing of the laser light source unit and an output value of the laser light so that a drawing image based on input image data is generated by scanning of the scanner in a scanning region scanned by the scanner, and controls the laser light source unit to output characteristic detection laser light for detecting the output value of the laser light output from the laser light source unit;

a scanner controller configured to control scanning of the scanner so that the scanner scans the laser light with a predetermined amplitude; and

a characteristic detection controller configured to control the scanner controller so that the scanner performs scanning in a range in which an amplitude of scanning of the scanner exceeds a scanning range corresponding to the predetermined amplitude when an output value of the laser light output from the laser light source unit is adjusted, control the laser light source controller to output the characteristic detection laser light during scanning in a region which is outside of a region in which the drawing image is generated and beyond the scanning range corresponding to the predetermined amplitude, and adjust the output value of the laser light based on a detection result of the output value of the characteristic detection laser light,

wherein the scanner controller controls the scanner to perform scanning with a predetermined scanning center as a scanning center,

the characteristic detection controller controls the scanner controller to perform scanning in a range beyond the scanning range corresponding to the predetermined amplitude by shifting the scanning center of the scanner from the predetermined scanning center, when the output value of the laser light output from the laser light source unit is adjusted, and

when the scanner performs scanning with a scanning center shifted from the predetermined scanning center as a scanning center, the characteristic detection controller controls the laser light source controller so that a drawing image based on image data indicating a single hue corresponding to an average hue of the input image data and a single luminance corresponding to an average luminance of the input image data is generated, instead of the drawing image based on the input image data.