A projector light source, a projector light source driving device and a driving method thereof
A driving device and projector technology, applied in the field of projector light source, can solve the problem of inability to complete the matching supply of projector manufacturers, and achieve the effects of improving the distribution of starting energy, ensuring reliable and stable operation, and optimizing lighting circuits.
Active Publication Date: 2015-12-02
珠海视鼎科技有限公司
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Problems solved by technology
Therefore, it is impossible to complete the supporting supply to the complete projector manufacturer, so as to realize the complete localization of the core light source system of the projector.
Method used
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[0045] The present invention will be further described below in conjunction with the accompanying drawings.
[0046] A projector light source provided by the present invention adopts a replaceable wick projection lamp structure and a high-performance electrode for a high-intensity gas discharge lamp. The high-performance electrode for a high-intensity gas discharge lamp is in a bullet-shaped electrode configuration. Inject mercury with a concentration of >0.15mg / mm3 and 10 into the bulb 4 Pa contains a mixture of argon gas and oxygen gas, and oxygen gas accounts for 0.1%-0.5% of the total volume of the two.
[0047] The halogen-tungsten cycle in operation improves the service life of the lamp and the stability of the point light source. In the technology of the present invention, mercuric bromide is added to form a halogen tungsten cycle, and a certain amount of oxygen is actively added to promote the reduction of halides such as mercuric bromide. When the lamp is working, t...
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The invention discloses a projector light source. A projecting lamp structure with a replaceable lamp wick and a high-performance electrode used for a high-intensity gas discharge lamp are adopted, the high-performance electrode used for the high-intensity gas discharge lamp is of a warhead-shaped electrode structure, mercury and argon are injected into a projector light source lamp wick blister shell, mercury bromide, oxygen and 85 Kr gas are further injected into the projector light source lamp wick blister shell, and therefore a short-arc ultra-high voltage mercury lamp can be in breakdown at 2KV to form stable arc discharge. The invention further provides a starting device matched with the projector light source. The starting device is composed of a power input part, a constant-power circuit, a full-bridge driving circuit, a full-bridge phase inverter circuit, an igniting circuit, a current detecting circuit, a voltage detecting circuit, a single-chip microcomputer, a constant-power MOS tube driving circuit used for constant-power circuit control, and a communication interface. The invention further provides a starting method matched with the projector light source in order to achieve a lower staring voltage and a shorter starting time, improve stability of the projection lamp source and prolong the service life of the projection lamp source.
Description
technical field [0001] The invention relates to a projector light source, in particular to a projector light source with an ultra-low starting voltage and a driving device thereof. Background technique [0002] The mainstream light source products used by projectors are short-arc ultra-high pressure mercury lamps. The basic principle is to fill the sealed quartz glass tube discharge bulb with mercury and halogen, and set two electrodes with opposite poles in the bulb. When the two electrodes are connected to the starting high-voltage voltage, a high potential difference is generated between the two electrodes and high heat is generated at the same time, mercury is vaporized into high-pressure mercury vapor, and the high-pressure mercury vapor is excited and discharged under the action of the high voltage difference to complete the lamp. Start and enter the working state. However, the volume of the bulb shell is very small, and the number of initial electrons obtained by nat...
Claims
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IPC IPC(8): H01J61/16H05B41/14G03B21/14
Inventor 沈立张蔚东余明云
Owner 珠海视鼎科技有限公司