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Coating head unit

A technology of coating heads and liquid crystals, applied in coatings, devices for coating liquid on surfaces, optics, etc., can solve problems such as processing errors of moving components and changes in assembly errors

Inactive Publication Date: 2013-03-27
TOP ENG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, even if an operation signal of the same magnitude is input to the moving member driving unit each time, the displacement of the moving member may vary due to, for example, processing errors, assembly errors, or degradation or failure of the moving member driving unit

Method used

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Embodiment Construction

[0029] Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0030] At least one coating head unit according to the invention is arranged in the LC coater. The coating head unit applies liquid crystal to the glass panel while moving relative to the glass panel. The coating head unit according to the present invention coats liquid crystals using a volume control method in which liquid crystals are discharged from the receiving space when the volume of the liquid crystal receiving space is reduced by movement of the moving member. The coating head unit of the present invention is characterized by displacement measuring means for measuring the displacement between before and after the movement of the moving member. In the present invention, two methods for measuring the displacement of the moving member will be disclosed. The first method of measurement is to indirectly measure the displacement of the mov...

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Abstract

The present invention discloses a coating head unit used for coating liquid crystal onto a glass panel during the manufacturing process of LCDs. The coating head unit comprises a discharging means, a mobile member, a stationary member and a displacement measuring means. The discharging means comprises a liquid crystal receiving member. The liquid crystal receiving member comprises a liquid crystal discharging channel and a liquid crystal receiving space arranged in the liquid crystal discharging channel. The discharging means also comprises a mobile piece movably arranged in the liquid crystal receiving space. When the mobile piece is moved to reduce the volume of the receiving space, liquid crystal is discharged out of the receiving space through the liquid crystal discharging channel. The mobile member is moved along the movement direction of the mobile piece together with the mobile piece. The stationary member is stationary in the movement direction relative to the mobile piece. The displacement measuring means measures the displacement of the mobile member relative to the stationary member.

Description

technical field [0001] The present invention relates to a coating head unit of a LC (liquid crystal) coating machine for coating liquid crystal on a glass panel in the process of manufacturing an LCD (liquid crystal display). Background technique [0002] An LCD (Liquid Crystal Display) is an image display that displays a desired image by independently supplying data signals based on image information to liquid crystal cells arranged in a matrix shape and thereby controlling light transmittance of the liquid crystal cells. [0003] To manufacture LCDs, a vacuum injection method was used in the past, but recently a method of coating liquid crystals has been widely used. The liquid crystal coating method involves coating liquid crystal directly on a glass panel, and applying pressure by bonding another glass panel to the above glass panel so that the coated liquid crystal is evenly coated on the entire area of ​​the glass panel, thereby forming liquid crystal layer. [0004]...

Claims

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Application Information

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IPC IPC(8): B05C11/10G02F1/1341
CPCB05C5/00B05C11/10G02F1/13
Inventor 郑载宽
Owner TOP ENG CO LTD
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