| Patent application number | Description | Published |
|---|
| 20090179571 | Method for Detecting Faults During Operation of High-Pressure Discharge Lamp Using Electronic Ballasts - According to the invention, a state automaton is used when operating a high-pressure discharge lamp on a ballast operated by means of a microprocessor in order to prevent certain malfunctions. | 07-16-2009 |
| 20090267529 | Circuit Arrangement and Method for the Operation of a High-Pressure Gas Discharge Lamp - Disclosed is a circuit arrangement for supplying a lamp wattage to a high-pressure gas discharge lamp (Lp) in the form of an alternating current having an operating frequency, said operating frequency being frequency-modulated within large limits. The time characteristic of the operating frequency is selected such that more power is supplied to the lamp at greater frequencies, thus reducing the risk of exciting acoustic resonance in the lamp. Amplitude modulation through the frequency response of an interface (L | 10-29-2009 |
| 20090295302 | Circuit Arrangement and Method for Operating a High-Pressure Discharge Lamp - A circuit arrangement for operating a high pressure discharge lamp includes a bridge circuit with at least two switches, a control device controlling the switches. The bridge circuit is a half-bridge circuit having exactly two switches. The control device switches on and off in an alternating manner, the first switch and the second switch of the bridge circuit having a first frequency. When the first switch is switched off for controlling the other switch with a rectangular signal of a second frequency which is greater than the first frequency and a predeterminable connection duration. The circuit also includes a tension measuring device measuring an actual value of tension over the high pressure discharge lamp. A reference device provides at least one upper threshold value for the voltage via the high pressure discharge lamp. A comparison device compares the actual voltage over the high pressure discharge lamp with the threshold value. | 12-03-2009 |
| 20090295308 | Method for Operating High-Pressure Lamps Without Hotstarting and Luminaire Having Two High-Pressure Discharge Lamps - High-pressure discharge lamps can only be restarted in the hot state at a very high starting voltage. In order to avoid hotstarting, a method for operating high-pressure discharge lamps without hotstarting comprises two high-pressure discharge lamps ( | 12-03-2009 |
| 20100270939 | Method And Electronic Ballast for Operating a High Pressure Discharge Lamp - A method for operating a high pressure discharge lamp with the aid of a high frequency signal is disclosed. The high pressure discharge lamp comprises at least one first ( | 10-28-2010 |
| 20110018459 | Method and Operating Device for Minimizing the Insulation Stress of a High-Pressure Discharge Lamp System - A method for minimizing the insulation stress of a high-pressure discharge lamp system, with an operating device, which generates a high voltage for starting the high-pressure discharge lamp, wherein a starting voltage time sum applied during lamp starting is minimized, the starting voltage time sum is the sum of all time segments Z | 01-27-2011 |
| Patent application number | Description | Published |
|---|
| 20090267529 | Circuit Arrangement and Method for the Operation of a High-Pressure Gas Discharge Lamp - Disclosed is a circuit arrangement for supplying a lamp wattage to a high-pressure gas discharge lamp (Lp) in the form of an alternating current having an operating frequency, said operating frequency being frequency-modulated within large limits. The time characteristic of the operating frequency is selected such that more power is supplied to the lamp at greater frequencies, thus reducing the risk of exciting acoustic resonance in the lamp. Amplitude modulation through the frequency response of an interface (L | 10-29-2009 |
| 20090295302 | Circuit Arrangement and Method for Operating a High-Pressure Discharge Lamp - A circuit arrangement for operating a high pressure discharge lamp includes a bridge circuit with at least two switches, a control device controlling the switches. The bridge circuit is a half-bridge circuit having exactly two switches. The control device switches on and off in an alternating manner, the first switch and the second switch of the bridge circuit having a first frequency. When the first switch is switched off for controlling the other switch with a rectangular signal of a second frequency which is greater than the first frequency and a predeterminable connection duration. The circuit also includes a tension measuring device measuring an actual value of tension over the high pressure discharge lamp. A reference device provides at least one upper threshold value for the voltage via the high pressure discharge lamp. A comparison device compares the actual voltage over the high pressure discharge lamp with the threshold value. | 12-03-2009 |
| 20090295308 | Method for Operating High-Pressure Lamps Without Hotstarting and Luminaire Having Two High-Pressure Discharge Lamps - High-pressure discharge lamps can only be restarted in the hot state at a very high starting voltage. In order to avoid hotstarting, a method for operating high-pressure discharge lamps without hotstarting comprises two high-pressure discharge lamps ( | 12-03-2009 |
| 20100270939 | Method And Electronic Ballast for Operating a High Pressure Discharge Lamp - A method for operating a high pressure discharge lamp with the aid of a high frequency signal is disclosed. The high pressure discharge lamp comprises at least one first ( | 10-28-2010 |
| 20110018459 | Method and Operating Device for Minimizing the Insulation Stress of a High-Pressure Discharge Lamp System - A method for minimizing the insulation stress of a high-pressure discharge lamp system, with an operating device, which generates a high voltage for starting the high-pressure discharge lamp, wherein a starting voltage time sum applied during lamp starting is minimized, the starting voltage time sum is the sum of all time segments Z | 01-27-2011 |
