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Ceramic projection lamp

A technology of projection lamps and ceramics, applied in discharge lamps, gas discharge lamps, high-pressure discharge lamps, etc., can solve problems such as arc tube blackening, high working current, and changing electrode distance, so as to reduce electrode heating and improve cold end Effect of temperature and guaranteed working pressure

Inactive Publication Date: 2010-11-10
CHAOZHOU ORILITE LIGHTING
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Due to the relatively short electrode distance of the projection lamp, the operating current is relatively high, resulting in high operating temperature of the electrode tip, evaporation of the electrode material, blackening of the arc tube, and changes in the distance between the electrodes, resulting in changes in the electrical and optical properties of the light source.

Method used

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Embodiment Construction

[0026] The present invention will be described in detail below in conjunction with the embodiments and accompanying drawings.

[0027] Such as figure 1 As shown, the present invention discloses a ceramic projection lamp, which includes a discharge chamber 1, electrode tubes 2 arranged at both ends of the discharge chamber 1, and an electrode assembly 3 extending into the discharge chamber 1 through the electrode tube 2. The discharge chamber 1 and The electrode tube 2 is made of transparent ceramic material. The electrode assembly 3 is airtightly sealed with the electrode tube 2 through the solder 4. The discharge chamber 1 is filled with mercury and a small amount of metal or rare earth halide. The discharge cavity 1 is filled with a proper proportion of metal halides as luminous substances to increase the light effect and further improve the color of the light. Metal halides include Na (sodium), K (potassium), Cs, Ce, In halides, or some rare earth halides, or combinations ...

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Abstract

The invention discloses a ceramic projection lamp, which comprises a discharge chamber, electrode pipes placed at two ends of the discharge chamber and electrode components entering the discharge chamber through the electrode pipes, wherein the discharge chamber and the electrode pipes are made of a transparent material; the electrode components and the electrode pipes are airtightly sealed by solder; and mercury is filled in the discharge chamber; each electrode pipe comprises an inner pipe section and a welded groove, which are connected; the inner pipe section is close to the discharge chamber, the welded groove is positioned at the position of the end face, the inside diameter of the welded groove is greater than that of the inner pipe section, and the welded groove and the discharge chamber are airtightly sealed by the solder. The ceramic projection lamp has high illumination efficiency and good sealing effect.

Description

technical field [0001] The invention belongs to the field of ceramic light sources, in particular to a ceramic projection lamp. Background technique [0002] Projectors require high-intensity, close-to-"point light" light sources. The development of microchip technology such as DLP and LCD has promoted the development of digitalization and miniaturization of projectors, and also promoted the requirements for high-efficiency projection lamps. [0003] Ultra-high pressure quartz mercury lamps are commonly used at present. The emission spectrum of mercury under normal conditions is mainly in the ultraviolet part. visible light, its luminous efficacy can reach 60 lumens per watt. [0004] At present, the brightness of projectors is not ideal enough. Compared with flat-panel displays such as LCD and PDP, projectors often need to be used under relatively dark background light. The main reasons are: the luminous efficiency of the current ultra-high pressure mercury lamp is about...

Claims

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Application Information

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IPC IPC(8): H01J61/20H01J61/36H01J61/14H01J61/04G03B21/20
CPCH01J61/86H01J61/366
Inventor 高鞫谢灿生张万镇
Owner CHAOZHOU ORILITE LIGHTING
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