Discharge lamp drive device, light source device, projector, and discharge lamp drive method

Patent metadata

Field	Value
Publication number	US-10568192-B2
Application number	US-201816229700-A
Country	US
Kind code	B2
Filing date	Dec 21, 2018
Priority date	Dec 25, 2017
Publication date	Feb 18, 2020
Grant date	Feb 18, 2020

Abstract

A discharge lamp drive device includes a discharge lamp driver configured to supply drive electric current to a discharge lamp having a first electrode and a second electrode, a control unit configured to control the discharge lamp driver; and a storage unit configured to store a plurality of drive patterns of the drive electric current. The control unit is configured to select one drive pattern from among the plurality of drive patterns based on machine learning, and implement the selected drive pattern. The control unit is configured to adjust a drive electric power supplied to the discharge lamp based on illumination level information relating to an illumination level of the discharge lamp, while performing switching among the drive patterns based on the machine learning, in a case where an inter-electrode voltage of the discharge lamp is larger than a given voltage value.

First claim

What is claimed is:

1. A discharge lamp drive device comprising:
a discharge lamp driver configured to supply drive electric current to a discharge lamp having a first electrode and a second electrode;
a control unit configured to control the discharge lamp driver; and
a storage unit configured to store a plurality of drive patterns of the drive electric current,
wherein the control unit is configured to select one drive pattern from among the plurality of drive patterns based on machine learning, and implement the selected drive pattern, and
wherein the control unit is configured to adjust a drive electric power supplied to the discharge lamp based on illumination level information relating to an illumination level of the discharge lamp, while performing switching among the drive patterns based on the machine learning, in a case where an inter-electrode voltage of the discharge lamp is larger than a given voltage value.

2. The discharge lamp drive device according to claim 1 ,
wherein the illumination level information includes the inter-electrode voltage, and
wherein the control unit adjusts the drive electric power so as to decrease the illumination level of the discharge lamp according to an increase in the inter-electrode voltage, in a case where the inter-electrode voltage is larger than the given voltage value.

3. The discharge lamp drive device according to claim 2 ,
wherein the control unit adjusts the drive electric power so as to decrease the illumination level of the discharge lamp by a given amount of change with respect to an amount of the increase in the inter-electrode voltage, in a case where the inter-electrode voltage is larger than the given voltage value.

4. The discharge lamp drive device according to claim 1 ,
wherein the control unit adjusts the drive electric power so as to maintain the illumination level of the discharge lamp as constant without depending on the inter-electrode voltage, in a case where the inter-electrode voltage is equal to or lower than the given voltage value.

5. The discharge lamp drive device according to claim 4 ,
wherein the control unit supplies the drive electric current whose electric current value is constant to the discharge lamp, in a case where the inter-electrode voltage is equal to or lower than the given voltage value.

6. The discharge lamp drive device according to claim 1 , further comprising:
an illumination level sensor configured to measure an illumination level of light emitted from the discharge lamp,
wherein the illumination level information includes a value measured by the illumination level sensor.

7. A projector comprising:
a discharge lamp configured to emit light;
the discharge lamp drive device according to claim 1 ;
a light modulation device configured to modulate the light emitted from the discharge lamp according to an image signal; and
a projection optical system configured to project the light modulated by the light modulation device.

8. A projector comprising:
a discharge lamp configured to emit light;
the discharge lamp drive device according to claim 2 ;
a light modulation device configured to modulate the light emitted from the discharge lamp according to an image signal; and
a projection optical system configured to project the light modulated by the light modulation device.

9. A projector comprising:
a discharge lamp configured to emit light;
the discharge lamp drive device according to claim 3 ;
a light modulation device configured to modulate the light emitted from the discharge lamp according to an image signal; and
a projection optical system configured to project the light modulated by the light modulation device.

10. A projector comprising:
a discharge lamp configured to emit light;
the discharge lamp drive device according to claim 4 ;
a light modulation device configured to modulate the light emitted from the discharge lamp according to an image signal; and
a projection optical system configured to project the light modulated by the light modulation device.

11. A projector comprising:
a discharge lamp configured to emit light;
the discharge lamp drive device according to claim 5 ;
a light modulation device configured to modulate the light emitted from the discharge lamp according to an image signal; and
a projection optical system configured to project the light modulated by the light modulation device.

12. A projector comprising:
a discharge lamp configured to emit light;
the discharge lamp drive device according to claim 6 ;
a light modulation device configured to modulate the light emitted from the discharge lamp according to an image signal; and
a projection optical system configured to project the light modulated by the light modulation device.

13. An discharge lamp drive method configured to supply drive electric current to a discharge lamp having a first electrode and a second electrode to drive the discharge lamp, the method comprising:
selecting one drive pattern from among a plurality of drive patterns of the drive electric current based on machine learning;
implementing the selected drive pattern; and
adjusting a drive electric power supplied to the discharge lamp based on illumination level information relating to an illumination level of the discharge lamp, while performing switching among the drive patterns based on the machine learning, in a case where an inter-electrode voltage of the discharge lamp is larger than a given voltage value.

Assignees

• Seiko Epson Corp

Inventors

• Suzuki Junichi
• Kono Masaru

Classifications

• G03B21/2026

  Gas discharge type light sources, e.g. arcs · CPC title

• H05B41/14

  Circuit arrangements · CPC title

• H04N9/3155

  for controlling the light source (light source control per se H05B35/00 – H05B47/00; control of an illumination source for displays in general G09G3/3406) · CPC title

• H01J61/86

  with discharge additionally constricted by close spacing of electrodes, e.g. for optical projection · CPC title

• H05B41/38

  Controlling the intensity of light · CPC title