Ink cartridge negative pressure control device and ink supply system using the same

Abstract

The invention provides an ink cartridge suction pressure regulating block and an ink supply system using the regulating block. The regulating block comprises a vacuum pump which is sequently connected in series with a first order suction pressure regulating block, at least a second order suction pressure regulating block and a third order suction pressure regulating block and used for regulating the suction pressure of the ink cartridge. The first order suction pressure regulating block and the third order suction pressure regulating block respectively comprises a suction pressure control valve and a buffering barrel slot that is connected in series with the suction pressure control valve. The second order suction pressure regulating block comprises a loop circuit pressure control valve and a buffering barrel slot that is connected in series with the loop circuit pressure control valve. The device can eliminate the pressure vibration generated by a vacuum pump and the suction pressurecan be decreased in grade. In the end, the stable tiny suction pressure can be obtained.

Description

technical field [0001] The invention relates to an ink box negative pressure regulating device and an ink supply system using the device. Background technique [0002] Inkjet technology has been applied in the manufacturing process of the color filter (Color Filter) of the liquid crystal display (Liquid Crystal Display, LCD). Inks of (Green, G) and blue (Blue, B) pigments are sprayed into the black matrix on a substrate at the same time, and the inks are cured to form RGB color layer patterns on the substrate. The RGB color layer can be formed at one time by using the inkjet method, which greatly simplifies the preparation process and greatly reduces the cost. The inkjet method has many advantages such as simplified manufacturing process, environmental protection, and saving raw materials. Therefore, in the preparation of color filters, the use of ink cartridge negative pressure adjustment devices is becoming more and more widespread. [0003] The inkjet head of the ink j...

AI Technical Summary

Problems solved by technology

However, the operation of the vacuum pump itself will produce pressure shocks, making the vacuum in the ink cartridge not stable enough, and the negative pressure fluctuates.

If the negative pressure is too large, it will counteract the pressure of the ink droplets ejected from the inkjet head. The possible impacts include: the size of the ejected ink droplets cannot be maintained stably or the ink droplets gradually become smaller, and the quality of the jet printing will deteriorate. , in severe cases, even the ink droplets cannot be completely dripped out

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