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Lamp

A discharge capacitor and electrode technology, applied in the field of lamps, can solve the problem of insufficient ultraviolet light output

Inactive Publication Date: 2011-01-26
USHIO DENKI KK
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] This type of lamp has conventionally been mainly used as a light source for modifying the surface of the object to be processed by irradiating vacuum ultraviolet rays on the surface of the object to be processed such as a liquid crystal substrate. However, in PSA applications, the wavelength required for polymerizing monomers is The output of ultraviolet light in the wavelength range of 300-380nm is not enough

Method used

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Embodiment 1

[0036] The lamp of Example 1 is made of quartz glass with a wall thickness of 2 mm, has a total length of 200 mm, a width of 42 mm, a height of 14 mm, and a discharge gap of 10 mm, and has electrodes made of gold with a total length of 130 mm and a width of 32 mm. A discharge gas containing krypton gas and iodine gas is enclosed in the discharge vessel.

Embodiment 2

[0038] The lamp of Example 2 is made of quartz glass with a wall thickness of 2 mm, has a total length of 200 mm, a width of 42 mm, a height of 14 mm, and a discharge gap of 10 mm, and has electrodes made of gold with a total length of 130 mm and a width of 32 mm. A discharge gas containing argon and gaseous iodine is enclosed in the discharge vessel.

Embodiment 3

[0040] The lamp of Example 3 is made of quartz glass with a wall thickness of 2 mm, has a total length of 200 mm, a width of 42 mm, a height of 14 mm, and a discharge gap of 10 mm, and has electrodes made of gold with a total length of 130 mm and a width of 32 mm. A discharge gas containing a mixed gas of iodine gas and a rare gas mixed with krypton gas and argon gas at a mixing ratio of 1:1 was enclosed in the discharge vessel.

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Abstract

The invention provides a light source most adaptable for PSA use. The invention aims to provide a lamp that efficiently emits ultraviolet rays of a wavelength range of wavelengths of 300 to 380 nm necessary for polymerizing monomers, in order to provide the optimum light source for PSA (Polymer Sustained Alignment). The lamp includes a discharge vessel 1 having discharge gas containing krypton gas and iodine gas sealed in, and a pair of electrodes 5, 6 arranged so as to opposed to each other pinching the discharge space formed inside the discharge vessel for emitting ultraviolet rays of a wavelength of 342 nm by forming exciting iodine molecules. A concentration of the iodine gas contained in the discharge gas is to be 0.04 to 0.9%, and at the same time, provided a field intensity applied on the discharge space is E (kV / cm), a partial pressure of the above rare gas is p1 (kPa), and a partial pressure of the iodine gas is p2 (kPa), the following formula holds good. E / p1>=(6.6*p2+124)*exp(-0.0093*p1).

Description

technical field [0001] The present invention relates to a lamp that excites iodine molecules to emit ultraviolet light by using a discharge gas containing iodine gas and one or more rare gases selected from krypton gas and argon gas. Background technique [0002] In the manufacturing process of liquid crystal displays, the following technology is used: when constituting the pixels of liquid crystals, monomers are mixed into the liquid crystals, and the tilting direction of the liquid crystal molecules is fixed by polymerizing the monomers in a state where the liquid crystal molecules are tilted. (PSA: Polymer Sustained Alignment, polymer stabilized alignment). According to Patent Document 1 that discloses PSA, as a light source for polymerizing monomers, it is preferable to irradiate monomers with, for example, a wavelength between Ultraviolet light of 300-380 nm (paragraph 0237 of Patent Document 1). [0003] Various light sources are known as ultraviolet light sources th...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01J65/04
Inventor 松泽聪司森本幸裕
Owner USHIO DENKI KK
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