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US 8,264,166 B2Granted
Amp control system by controlling outputs of a buck DC-DC converter
OwnerChien-Chih Kuoinventor
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OwnerChien-Chih Kuoinventor
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A lamp control system includes at least one lamp structure; comprising: a lamp body; a ballast connected to the lamp body; the ballast including: a first stage for converting AC current into DC current and boosting of voltage; a buck DC-DC converter; a transistor of the buck DC-DC converter having an input end; a PWM controller being installed between an output end of the lamp body and the input end of the transistor; a frequency controllable oscillator being connected to the PWM controller and an oscillation controlling processor being connected to the frequency controller oscillator for generating instructions to change the oscillation frequency of the oscillator and thus to adjust the modulation frequency of the PWM controller; sensors about voltages, currents, and illuminations are installed for light strength control, temperature control, auto-turning on and off of the HID lamp, power control and time and illumination control.
A lamp control system mainly by controlling outputs of a buck DC-DC converter;
Dependencies are inferred from the claim text.
From the US filing history. Foreign family members aren’t listed.
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With semiconductor devices and specially adapted for lamps without preheating electrodes, e.g. for high-intensity discharge lamps, high-pressure…:…
Energy efficient lighting technologies
Electric heating
Energy-efficient buildings
About 4 years 4 months of term left · ends 13 Feb 2031 (estimated)
The present invention is related to lamps, and in particular to a lamp control system by controlling outputs of a buck DC-DC converter. Furthermore, sensors about voltages, currents, and illuminations are installed for light strength control, temperature control, auto-turning on and off of the HID lamp, power control and time and illumination control.
With reference to FIG. 1, the relation of the voltage with respect to time of the actuation of an HID lamp is illustrated. In FIG. 2, the relation of the current with respect to time of the actuation of the HID lamp is illustrated. When the HID lamp is actuated, the internal gas will convert to a form of plasma. The voltage between two electrodes of the lamp tube will operate with a specific range. When the HID lamp is steady, the light efficiency of the HID lamp is controlled by adjusting the current, while the variation of the voltage between the two electrodes is small.
The power sources of the HID lamps may be AC source or DC source. After an HID lamp is light up, to sustain the temperature between the two electrodes, if the temperature of the electrodes descends too quickly, the electrons cannot be stimulated. Then the HID lamp will distinguish.
FIG. 1 shows the relationship of the HID lamp actuation voltage versus time.
FIG. 2 shows the relationship of the HID lamp actuation current versus time.
FIGS. 3-1 and 3-2 show the functional block of an HID ballast, where FIG. 3-1 is suitable for an AC HID lamp and FIG. 3-2 shows a DC HID lamp.
In order that those skilled in the art can further understand the present invention, a description will be provided in the following in details. However, these descriptions and the appended drawings are only used to cause those skilled in the art to understand the objects, features, and characteristics of the present invention, but not to be used to confine the scope and spirit of the present invention defined in the appended claims.
The structure of the present invention will be described herein with reference to the attached drawings. The present invention is suitable for AC or DC driving lamps. However, in the following the AC driving HID lamp is used in the description of the invention, while this is only a preferred embodiment, but it is not used to confine the scope of the present invention.
With reference to FIGS. 3-1 and 3-2, the internal structure of an HID ballast if illustrated. The structure in FIG. 3-1 is suitable for AC driving HID lamp. FIG. 3-2 shows a DC driving HID lamp. Since most HID lamp is driven by AC signal, general public power source has voltages between 110 to 240V which can not be provide to HID lamps. Thus the voltage adjust ballasts are necessary.