Method and device for coating alignment film
A coating method and coating device technology, which are applied to the device, spray device, spray device and other directions for coating liquid on the surface, can solve the problems of inability to spray, the uniformity of the surface of the alignment film cannot be guaranteed, etc., to improve product quality. rate, improve uniformity, and ensure the effect of product quality
Inactive Publication Date: 2014-04-16
TCL CHINA STAR OPTOELECTRONICS TECH CO LTD
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Problems solved by technology
For high-viscosity alignment liquid, the existing inkjet printing technology cannot effectively eject it, and the uniformity of the alignment film surface cannot be guaranteed
Method used
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[0031] see figure 2 , the present invention provides a method for coating an alignment film, comprising the following steps:
[0032] Step 1. Provide a substrate to be coated with an alignment film, and place the substrate to be coated with an alignment film on a worktable capable of moving back and forth, left, and right.
[0033] The substrate to be coated with an alignment film is a thin film transistor array substrate or a color filter film substrate. The workbench can be controlled by a control device to move back and forth, back and forth, left and right.
[0034] Step 2, providing a pressurized tank, and placing a certain amount of alignment liquid in the pressurized tank.
[0035] The main components of the alignment liquid are polyimide, N-methylpyrrolidone (NMP), butyl glycol ether (BC) and the like.
[0036] Step 3, providing a supply tank, and transporting the alignment liquid in the pressurized tank to the supply tank through a pump.
[0037] The supply tank,...
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The invention relates to a method and device for coating an alignment film. The method comprises the steps that firstly, a substrate of the alignment film to be coated is provided, and the substrate is placed on a workbench which is capable of moving back and forth and left and right; secondly, a pressurizing groove is provided, and a certain number of alignment solutions is arranged in the pressurizing groove; thirdly, a feeding groove is provided, and an infusion pump is used for conveying the alignment solutions in the pressurizing groove to the feeding groove; fourthly, a feeding pipeline is connected with an alignment solution spray nozzle, the feeding pipeline is heated, and the viscosity of the alignment solutions is reduced so that the alignment solutions can smoothly enter the alignment solution spray nozzle; fifthly, the substrate of the alignment film to be coated is coated with the low-viscosity alignment solutions through the alignment solution spray nozzle, the workbench is moved back and forth according to the needs in the coating process to enable the substrate to be evenly coated with the alignment solutions, and coating of the alignment film can be finished. By means of the method and device, the evenness of the surface of the alignment film is improved, the product quality is guaranteed, and the product yield is improved.
Description
technical field [0001] The invention relates to liquid crystal display manufacturing technology, in particular to an alignment film coating method and device. Background technique [0002] A Liquid Crystal Display (LCD) has many advantages such as a thin body, power saving, and no radiation, and has been widely used. However, as we all know, liquid crystal displays are passive light-emitting devices, and the liquid crystal material itself does not emit light. Therefore, most of the liquid crystal displays currently on the market are backlight liquid crystal displays, which include a liquid crystal display panel and a backlight module. [0003] The working principle of the liquid crystal display panel is to place liquid crystal molecules between two parallel glass substrates, and control the liquid crystal molecules to change direction by applying a driving voltage on the two glass substrates, refracting the light from the backlight module to produce a picture. Usually, a li...
Claims
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IPC IPC(8): G02F1/1337B05D1/02B05C9/14
CPCG02F1/133723B05B1/02B05D1/02B05B9/04B05B9/002B05B9/0403B05B13/0221
Inventor 陈杰
Owner TCL CHINA STAR OPTOELECTRONICS TECH CO LTD