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UV irradiation device

An irradiating device, ultraviolet technology, applied in nonlinear optics, instruments, optics, etc., can solve the problems of the decline of the reliability of the liquid crystal panel, the thermal influence of the liquid crystal panel, etc.

Active Publication Date: 2017-11-28
TOSHIBA LIGHTING & TECH CORP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

In order to polymerize the monomer, it is effective to irradiate ultraviolet rays with a high absorption spectrum around 250nm, but if irradiated with ultraviolet rays below 300nm, it will affect the liquid crystal panel and may reduce the reliability of the liquid crystal panel
In addition, light with a wavelength longer than 380nm may have a thermal effect on the liquid crystal panel

Method used

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Embodiment Construction

[0019] Embodiments for carrying out the invention will be described below.

[0020] An ultraviolet irradiation device according to an embodiment will be described with reference to the drawings. figure 1 It is a figure for demonstrating embodiment concerning an ultraviolet irradiation apparatus.

[0021] figure 1 It is a schematic diagram of an ultraviolet irradiation device used in the photo-alignment process of a liquid crystal panel. The ultraviolet irradiation device includes a casing 1 . The case 1 is made of metal or the like that is excellent in reflectivity of ultraviolet rays, and has a space formed therein. In this space, the first light source and the second light source are arranged. The first light source is a tubular first fluorescent lamp 2 , and a plurality of them are arranged in parallel so that the tube axes are substantially parallel. The second light source is a tubular second fluorescent lamp 3 , and a plurality of them are arranged in parallel betwe...

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PUM

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Abstract

The present invention provides an ultraviolet irradiation device capable of irradiating strong ultraviolet rays with respect to 310nm to 380nm, especially 320nm to 350nm. In the ultraviolet irradiation device according to the embodiment, a plurality of first fluorescent lamps 2 formed with a phosphor layer 22 including LaPO4:Ce as a phosphor having a peak wavelength at 310 nm to 340 nm are arranged in parallel, and the first fluorescent lamps 2 are located between the first fluorescent lamps 2. A plurality of second fluorescent lamps 3 in which a phosphor layer including YPO4:Ce as a phosphor having a peak wavelength at 340 nm to 360 nm is formed are arranged in parallel.

Description

technical field [0001] Embodiment of this invention relates to the ultraviolet irradiation apparatus used for the manufacturing process of a liquid crystal panel, etc. Background technique [0002] In the manufacturing process of a liquid crystal panel, in order to control alignment generally, the photo-alignment process called PSA (Polymer Sustained Alignment, polymer sustained alignment) process is performed. This step is a step of irradiating ultraviolet rays to a liquid crystal panel including a liquid crystal and a monomer as a photoreactive substance to polymerize the monomer to control the orientation of the liquid crystal. For irradiation of ultraviolet rays, as in Patent Document 1, an ultraviolet lamp is mainly used. [0003] Here, the monomer has the highest absorption spectrum at around 250 nm, and tends to decrease as it goes to longer wavelengths. In order to polymerize the monomer, it is effective to irradiate ultraviolet rays with a high absorption spectrum...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G02F1/1337
Inventor 日野弘喜藤冈纯田内亮彦
Owner TOSHIBA LIGHTING & TECH CORP