Light irradiation apparatus
First Claim
Patent Images
1. A light irradiation apparatus comprising:
- a light source generating ultraviolet light;
a polarizer polarizing the ultraviolet light generated in the light source; and
a filter, separate from the polarizer, blocking off the polarized light from the polarizer except an effective wavelength band of light for a photo alignment,wherein the filter includes a high pass filter blocking off a short wavelength band of light and a low pass filter blocking off a long wavelength band of light,wherein the short wavelength band is in a wavelength range below 250 nm,wherein the long wavelength band is in a wavelength range above 300 nm,wherein the polarizer includes a plurality of quartz plates,wherein the polarizer has an extinction ratio range of 34;
1˜
20;
1,wherein a collimator is configured between the filter and a substrate to guide the light from the filter toward a substrate,wherein the light source includes a lamp having a high peak value within the effective wavelength band of about 200 nm˜
330 nm.
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Abstract
A light irradiation apparatus adapted to form an alignment of an LCD device through a photo alignment process is disclosed. The light irradiation apparatus includes a light source generating ultraviolet light, a polarizer polarizing the ultraviolet light generated in the light source, and a filter blocking off the polarized light from the polarizer except an effective wavelength band of light for a photo alignment.
17 Citations
1 Claim
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1. A light irradiation apparatus comprising:
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a light source generating ultraviolet light; a polarizer polarizing the ultraviolet light generated in the light source; and a filter, separate from the polarizer, blocking off the polarized light from the polarizer except an effective wavelength band of light for a photo alignment, wherein the filter includes a high pass filter blocking off a short wavelength band of light and a low pass filter blocking off a long wavelength band of light, wherein the short wavelength band is in a wavelength range below 250 nm, wherein the long wavelength band is in a wavelength range above 300 nm, wherein the polarizer includes a plurality of quartz plates, wherein the polarizer has an extinction ratio range of 34;
1˜
20;
1,wherein a collimator is configured between the filter and a substrate to guide the light from the filter toward a substrate, wherein the light source includes a lamp having a high peak value within the effective wavelength band of about 200 nm˜
330 nm.
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Specification
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Current AssigneeLG Display Co., Ltd.
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Original AssigneeLG Display Co., Ltd.
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InventorsShin, Dong Cheon
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Primary Examiner(s)Allen, Stephone B
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Assistant Examiner(s)MADONNA, JEFFREY E
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Application NumberUS12/654,068Publication NumberTime in Patent Office1,700 DaysField of Search349 92- 94, 349123-124, 349139-140, 349/191, 250/504.R, 359/361, 35948502-48504, 359/352US Class Current359/352CPC Class CodesG02B 27/286 for controlling or changing...G02B 5/003 Light absorbing elementsG02B 5/201 in the form of arraysG02B 5/208 for use with infrared or ul...G02B 5/3075 for use in the UV G02B5/306...G02F 1/133788 by light irradiation, e.g. ...
