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System and method for operating HID lamp

A discharge lamp, high-brightness technology, applied in the field of vertical segregation, which can solve problems such as increasing circuit complexity

Inactive Publication Date: 2007-10-10
KONINK PHILIPS ELECTRONICS NV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

More advanced filters or phase modulation can overcome the short-circuit problem of the low-pass filter, but increase the complexity of the circuit

Method used

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  • System and method for operating HID lamp
  • System and method for operating HID lamp
  • System and method for operating HID lamp

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0040] Referring to Figure 1, there is shown a power supply system 11 for stabilizing a long and thin high intensity discharge lamp 10 and for reducing vertical segregation (color mixing) within the lamp 10.

[0041]System 11 provides current CS to lamp 10 during an initial operating cycle of lamp 10. 1 , whereby the current signal CS through 1 A stable operation of the lamp 10 is achieved, where the current signal CS 1 with a power frequency sweep corresponding between the frequency of the first horizontal acoustic mode of the lamp 10 and the frequency of the first radial acoustic mode of the lamp 10 (is the current signal CS 1 Twice the frequency sweep of ) frequency sweep.

[0042] System 11 then provides current signal CS to lamp 10 in a time-sequential manner 1 and the current signal CS 2 , whereby the current signal CS through 2 Operational stability and color mixing within the lamp 10 is achieved, where the current signal CS 2 It has a corresponding power frequenc...

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PUM

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Abstract

Power source systems implementing methods for reducing vertical segregation (color mixing) in a long and thin high intensity discharge lamp are disclosed. Each system provides a current frequency signal to the lamp that excites an azimuthal acoustic and longitudinal acoustic combination mode of the lamp whereby color mixing within the lamp can be achieved. Each system further adjusts the current frequency signal as needed to stabilize color mixing within the lamp.

Description

technical field [0001] The present invention generally relates to reducing vertical segregation in high intensity discharge (HID) lamps. The invention is particularly concerned with reducing vertical segregation by exciting the combined horizontal and longitudinal acoustic modes of HID lamps. Background technique [0002] Acoustic resonance is driven by periodic power input. For a sinusoidal waveform, the frequency of the power that excites the acoustic resonance is twice the frequency of the current. [0003] Reduction of vertical segregation (color mixing) in HIDs has previously been achieved by exciting a second longitudinal acoustic mode of the lamp. For long and thin lamps, the frequency at which the second longitudinal acoustic mode excites the HID lamp is lower than the frequency at which the first horizontal acoustic mode excites the HID lamp and the frequency at which the first radial acoustic mode excites the HID lamp. Before exciting the second longitudinal aco...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H05B41/292H05B41/24
CPCY02B20/208H05B41/2928Y02B20/00
Inventor J·M·克拉默
Owner KONINK PHILIPS ELECTRONICS NV