Discharge lamp electronic ballast luminaire and vehicle with same

A luminaire, comprising a discharge lamp electronic ballast, wherein the discharge lamp electronic ballast comprises:

• a DC-DC converter circuit configured to convert a voltage of a DC power supply so as to output DC power;
• an inverter circuit configured to convert the DC power into AC power to supply the power to a discharge lamp;
• and
• a controller configured to control the DC-DC converter circuit and the inverter circuit,
• wherein the controller comprises:
• a voltage detector configured to detect a voltage value of the DC power supply or a value corresponding to the voltage value;
• and
• a temperature detector configured to detect a temperature of the ballast or a value corresponding to the temperature of the ballast,
• wherein the controller is configured:
• during a first time period from a point in time when the discharge lamp is started and a second time period after the first time period, to supply the discharge lamp with power larger than power to be supplied during a stable operation of the discharge lamp;
• to supply the discharge lamp with a rated output for a fixed time after the second time period, thereby supplying the discharge lamp with power equal to or larger than a fixed value until a first time elapses from a start of the discharge lamp, the first time including the first time period, the second time period and the fixed time;
• and
• to reduce the power supplied to the discharge lamp when the first time elapses from the start of the discharge lamp, thereby supplying the lamp with power for the stable operation,
• wherein the controller is further configured to set the first time based on a detection result of the voltage detector and a detection result of the temperature detector.

A vehicle, comprising:

• a luminaire comprising a discharge lamp electronic ballast, wherein the discharge lamp electronic ballast comprises:
• a DC-DC converter circuit configured to convert a voltage of a DC power supply so as to output DC power;
• an inverter circuit configured to convert the DC power into AC power to supply the power to a discharge lamp;
• and
• a controller configured to control the DC-DC converter circuit and the inverter circuit,
• wherein the controller comprises:
• a voltage detector configured to detect a voltage value of the DC power supply or a value corresponding to the voltage value;
• and
• a temperature detector configured to detect a temperature of the ballast or a value corresponding to the temperature of the ballast,
• wherein the controller is configured:
• during a first time period from a point in time when the discharge lamp is started and a second time period after the first time period, to supply the discharge lamp with power larger than power to be supplied during a stable operation of the discharge lamp;
• to supply the discharge lamp with a rated output for a fixed time after the second time period, thereby supplying the discharge lamp with power equal to or larger than a fixed value until a first time elapses from a start of the discharge lamp, the first time including the first time period, the second time period and the fixed time;
• and
• to reduce the power supplied to the discharge lamp when the first time elapses from the start of the discharge lamp, thereby supplying the lamp with power for the stable operation,
• wherein the controller is further configured to set the first time based on a detection result of the voltage detector and a detection result of the temperature detector.