KR-20260066477-A - Method for manufacturing ultra-constant discharge lamp with improved luminous efficiency and color rendering

Abstract

The method for manufacturing an ultra-high pressure discharge lamp with improved luminous efficiency and color rendering according to the present invention relates to a method for manufacturing an ultra-high pressure discharge lamp that is improved and has a relatively increased lifespan compared to conventional ultra-high pressure discharge lamps, comprising: a light-emitting tube sealing step of filling the light-emitting tube with the discharge gas and sealing the light-emitting tube by joining the electrode rod; a lead line welding step of welding the lead line to the electrode rod joined to the light-emitting tube; and a sealed glass tube forming step that acts as an external protective film while the lead line is exposed. The invention is characterized by including a connector coupling step in which a connector connecting the lead line and the output terminal of the UCD ballast is coupled to a sealed glass tube in which the lead line is exposed; wherein the discharge gas charged in the light-emitting tube is composed of a metal additive and a fluorinated gas, wherein the metal additive is composed of one or more metal salts selected from sodium, scandium, thallium, indium, and dysprosium, and the inert gas is a mixed gas in which argon (Ar), neon (Ne), or nitrogen ( N₂ ) is added according to the purpose to xeno (Xe) gas or krypton (Kr) gas; thereby providing an ultra-high pressure discharge lamp that exhibits high efficiency and color rendering compared to an ultra-high pressure discharge lamp manufactured according to the prior art, and providing an ultra-high pressure discharge lamp with a relatively long lifespan.

Inventors

• 이재형
• 엄재웅

Assignees

• 주식회사 넥스트에코
• 엄재웅

Dates

Publication Date

20260512

Application Date

20241104

Claims (2)

1. A method for manufacturing an ultra-high pressure discharge lamp comprising a light-emitting tube, an electrode rod, a discharge gas, a lead line, a sealed glass tube, and a connector part, A light-emitting tube sealing step of filling the light-emitting tube with the discharge gas and sealing the light-emitting tube by joining the electrode rod; A lead line welding step for welding an electrode rod and a lead line coupled to the above-mentioned light-emitting tube; A step of forming a sealed glass tube that acts as an external protective film with the above lead line exposed; and The method is characterized by including a connector coupling step in which a connector connecting the lead line and the output terminal of the UCD ballast is coupled to a sealed glass tube in which the lead line is exposed. A method for manufacturing an ultra-high pressure discharge lamp with improved luminous efficiency and color rendering, characterized in that the discharge gas charged in the above-mentioned light-emitting tube is composed of a metal additive and a fluorinated gas, wherein the metal additive is composed of one or more metal salts selected from sodium, scandium, thallium, indium, and dysprosium, and the inert gas is a mixed gas in which argon (Ar), neon (Ne), or nitrogen ( N₂ ) is added according to the purpose to xeno (Xe) gas or krypton (Kr) gas.
2. In paragraph 1, the discharge gas A method for manufacturing an ultra-high pressure discharge lamp with improved luminous efficiency and color rendering, characterized by mixing xenon gas and krypton gas in a ratio of 7:3 or 5:5.

Description

Method for manufacturing ultra-constant discharge lamp with improved luminous efficiency and color rendering The present invention relates to a method for manufacturing a super-high pressure discharge (UCD) lamp, and more particularly to a method for manufacturing a super-high pressure discharge lamp in which luminous efficiency and color rendering are improved compared to conventional super-high pressure discharge lamps and the lifespan is also relatively increased. Indoor facilities such as roads, parks, and factories, and outdoor facilities such as sports fields, are equipped with lighting devices so that users can use the facilities without inconvenience at night or in dark environments. Lighting devices such as the above include LED lighting, ultra-high pressure discharge lighting, low pressure sodium lighting, ceramic metal lighting, and electrodeless fluorescent lighting, depending on the type of light source (lamp). Meanwhile, the ultra-high pressure discharge lamp (hereinafter referred to as the "UCD lamp") used in the above-mentioned ultra-high pressure discharge lighting utilizes various metals and gases; generally, mercury and metal halides are used as metals, and argon and xenon are mainly used as gases. Mercury emits ultraviolet rays during discharge, metal halides regulate the color temperature of the light, argon enhances stability during the initial stages of discharge, and xenon generates high-intensity light. UCD lamps, which have the above characteristics, have a slightly shorter lifespan compared to LED lamps that have been growing rapidly recently, but have the advantages of higher luminous efficiency and color rendering, and a relatively very low price, and are environmentally friendly as they use an extremely small amount of mercury compared to low-pressure sodium lamps or ceramic metal lamps. As a result, the use of UCD lamps as light sources for lighting devices in various fields has recently been increasing, and various studies are being conducted to improve the performance of UCD lamps. As prior art related to such UCD lamps, the invention titled 'Discharge Lamp' in application number 10-2009-0108066 has been disclosed. The above prior art relates to an innovative cathode design that dramatically improves the lifespan of a discharge lamp, and discloses a technology that promotes the reduction of lanthanum oxide and increases the supply of lanthanum by incorporating carbon into tungsten metal. The above conventional technology aims to extend the lifespan of a discharge lamp by improving the cathode design, and in particular, to promote the reduction of lanthanum oxide (La2O3) and increase the supply of lanthanum oxide (La) at the cathode. This can be achieved by dissolving carbon in a tungsten metal base of the cathode containing lanthanum oxide as an electron-emitting material, thereby solving the problem of increased cathode temperature, deformation, and flickering. Specifically, the cathode design incorporates a tungsten metal base containing dissolved carbon, lanthanum oxide (La2O3) as an electron-emitting material, and zirconium oxide (ZrO2) as a stabilizer, with the carbon concentration controlled to not exceed 100 wt. ppm (approx. 0.15 at) to prevent the electrode from melting during lamp operation. The cathode structure consists of a tip, a taper, and a body, and the carbon concentration is higher in the tip than in the taper section to optimize the lanthanum reduction and feeding process. Another prior art application number 10-2001-0036470, titled 'Method for manufacturing a discharge lamp and discharge lamp,' aims to provide a method for manufacturing a discharge lamp capable of defining the electrode spacing with high precision. Through the steps of preparing a glass pipe and one electrode assembly, inserting the electrode assembly into the glass pipe, forming a discharge tube by attaching a side tube portion to a part of the electrode assembly, and forming a pair of electrodes by selectively melting a part of the electrode structure portion, the effect of precisely controlling the electrode spacing using one electrode assembly, the effect of cleaning the inside of the discharge tube using halogen, and the effect of realizing an electrode spacing of 1 mm or less. That is, the above prior art has the effect of realizing a high-performance lamp with an electrode gap of 1 mm or less, which was difficult with prior art. As described above, ultra-high pressure discharge (UCD) lamps require relatively high efficiency, excellent color rendering, a wide operating temperature range, and an environmentally friendly manufacturing method. FIG. 1 is a diagram showing the sequence of the method for manufacturing an ultra-high pressure discharge lamp with improved luminous efficiency and color rendering according to the present invention. FIG. 2 is a drawing for explaining the structure of an ultra-high pressure discharge lamp with improved luminous efficiency and color rendering acc