Spray nozzle, system and method controlling fluid drops from spreading
A nozzle and droplet technology, which is applied in nonlinear optics, instruments, optics, etc., can solve the problems that the alignment liquid around the array substrate cannot diffuse and affect the shipment ratio, etc.
Inactive Publication Date: 2018-01-26
BEIJING BOE DISPLAY TECH CO LTD +1
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Problems solved by technology
Due to the defect of the droplet diffusion method, it is easy to cause the alignment liquid to not diffuse around the array substrate and the four corners. In the actual mass production process, peripheral Mura phenomena such as black Mura around the alignment liquid and yellow Mura around the alignment liquid are formed.
When defects occur, they usually occur in batches, and in severe cases, it can reach more than 20%, seriously affecting the proportion of shipments that can be made.
Method used
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[0042] In order to illustrate the present invention more clearly, the present invention will be further described below in conjunction with preferred embodiments and accompanying drawings. Similar parts in the figures are denoted by the same reference numerals. Those skilled in the art should understand that the content specifically described below is illustrative rather than restrictive, and should not limit the protection scope of the present invention.
[0043] At present, there are two main ways to solve the problem of Mura caused by uneven diffusion of the alignment liquid. One is to control the EM value of the edge position of the alignment liquid diffusion (such as figure 1 shown); the second is to open the sealing cover of the working chamber when the coated alignment droplets are pre-cured in the pre-curing equipment, so that the chamber is communicated with the outside world to promote the diffusion of the alignment liquid (as shown in Figure 2). These two methods h...
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The invention discloses a spray nozzle, a system and a method controlling fluid drops from spreading. The spray nozzle comprises at least one air feed nozzle feeding air toward an array substrate andat least one air return nozzle sucking in the opposite direction of the array substrate, wherein the air feed nozzle is arranged above a target area of the array substrate, the air return nozzle is arranged above a non-target area outside the target area of the array substrate, and the air feed nozzle and the air return nozzle cooperate with each other and apply a circulating air flow to the arraysubstrate below the spray head, so as to control fluid drops on the surface of the array substrate to spread. Due to guiding of the air flow, an alignment liquid is well sprea, so that the alignmentliquid can spread uniformly and rapidly. The system is a flexible, changeable bidirectional system, is applicable to array substrates of various sizes, and has the feasibility of mass production.
Description
technical field [0001] The present invention relates to the field of liquid crystal display, and more specifically, to a spray head, a system and a method for controlling droplet diffusion. Background technique [0002] At present, in the process of forming a box of alignment liquid in the LCD industry, there are two process methods for coating the alignment liquid: inkjet and coating, and the two methods have their own characteristics. [0003] The inkjet process uses the nozzles on the nozzle to drop droplets according to the designed program to form a pattern, and the dropped alignment liquid droplets rely on their own internal tension to spread around. Due to the defect of the droplet diffusion method, it is easy to cause the alignment liquid to not diffuse around the array substrate and the four corners. In the actual mass production process, peripheral Mura phenomena such as black Mura around the alignment liquid and yellow Mura around the alignment liquid are formed. ...
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IPC IPC(8): G02F1/1337G02F1/1339
Inventor 黎关超周波何伟王超
Owner BEIJING BOE DISPLAY TECH CO LTD