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Inkjet printing device and method for coating alignment film

A technology of inkjet printing and alignment film, applied in printing and other directions, can solve the problems of uneven coating and slow diffusion of alignment film, and achieve the effect of accelerating diffusion and solving uneven diffusion

Inactive Publication Date: 2017-05-03
BOE TECH GRP CO LTD +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The technical problem to be solved by the present invention is the slow diffusion of the alignment film, which leads to uneven coating

Method used

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  • Inkjet printing device and method for coating alignment film
  • Inkjet printing device and method for coating alignment film
  • Inkjet printing device and method for coating alignment film

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Embodiment Construction

[0021] Embodiments of the present invention will be described in detail below with reference to the accompanying drawings.

[0022] figure 2 A cross-sectional view of the inkjet printing device according to the embodiment of the present invention in the moving direction of the inkjet head is shown.

[0023] Such as figure 2 As shown, similar to the inkjet printing device in the prior art, the inkjet head 22 on the frame 21 sprays polyimide droplets 24 to the substrate 23 to form an alignment film. Compared with the inkjet printing apparatus in the prior art, the inkjet printing apparatus according to the embodiment of the present invention further includes an air knife (air knife) 25 located behind the inkjet head 22 and fixed on the frame 21 . Herein, "rear" refers to the rear in the moving direction of the inkjet head. Air knife is a drying device, which is widely used in electronics, semiconductor and other industrial fields. It sprays drying gas to components to dry, ...

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PUM

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Abstract

The invention relates to an ink jet printing device and a method for spreading an alignment layer. The ink jet printing device comprises a machine frame and an ink jet head fixed to the machine frame, and further comprises an air knife located at the back of the ink jet head and fixed to the machine frame. By the adoption of the ink jet printing device and the method for spreading the alignment layer, diffusion of the alignment layer can be quickened, and the problem that the alignment layer is uneven in diffusion is solved.

Description

technical field [0001] The invention relates to the field of display technology, in particular to an inkjet printing device and a method for coating an alignment film. Background technique [0002] In the display industry, especially the TFT-LCD manufacturing industry, with the expansion of the production line, inkjet printing is usually used for the coating of the alignment film, which requires a low viscosity of the alignment film, usually less than 15cp. After coating by inkjet printing, the alignment film can only be diffused by the surface tension of the droplets. This method can easily cause the problems of slow diffusion of the alignment film and uneven alignment film, especially for large-size products. [0003] Figure 1A A cross-sectional view of a conventional inkjet printing device in the moving direction of an inkjet head is shown. The inkjet head 12 on the frame 11 sprays polyimide droplets 14 onto the glass substrate 13 to form an alignment film. The plan vi...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B41J2/01
Inventor 马国靖宋勇志
Owner BOE TECH GRP CO LTD
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