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Ink jet printing spray head, ink jet amount measuring system and method and ink jet amount control method

An inkjet printing and measurement system technology, applied in printing, electrical components, electric solid devices, etc., can solve the problems of the difficulty of accurate measurement of ink droplet volume and the difficulty of accurate arrangement of multiple rows of nozzles, so as to improve the accuracy of inkjet printing and ensure The effect of uniformity

Active Publication Date: 2018-02-13
BOE TECH GRP CO LTD
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Problems solved by technology

The problem brought by this method is that it is difficult to accurately arrange the multiple rows of nozzles in a straight line, and it is difficult to accurately measure the volume of ink droplets.

Method used

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  • Ink jet printing spray head, ink jet amount measuring system and method and ink jet amount control method
  • Ink jet printing spray head, ink jet amount measuring system and method and ink jet amount control method
  • Ink jet printing spray head, ink jet amount measuring system and method and ink jet amount control method

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Embodiment Construction

[0043] 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.

[0044] Such as figure 1 As shown, the nozzle of an inkjet printing device in the prior art is provided with a plurality of nozzles arranged in a multi-row matrix type. When printing, the nozzle is moved in parallel to print a certain film layer on the OLED display substrate. Realize printing pixels of the same specification with different nozzles. This nozzle solution facilitates the average amount of ink in each pixel, improves efficiency, and reduces the generation of random mura due to volume differences that exist bet...

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Abstract

The invention discloses an ink jet printing spray head, an ink jet amount measuring system and method and an ink jet amount control method. The ink jet printing spray head comprises a cavity used forcontaining ink, and multiple nozzles communicating with the cavity and used for conducting ink jet printing. The printing spray head further comprises an electricity applying device used for applyingelectric charges to ink drops passing through the nozzles, ink jet signals corresponding to the preset ink drop amount are applied to the nozzles. The charged ink drops pass through a magnetic field so that the dropping track of the ink drops can be deflected, the ink drop amount is calculated according to the ink drop dropping point positions, ink jet signals are adjusted after the ink jet amountis compared with the preset amount, and therefore the ink drops can have the preset amount. By means of the ink jet printing spray head, the ink jet amount measuring system and method and the ink jetamount control method, the deflection principle of charged particles in the magnetic field is used, the ink jet signals are changed, and the ink drop dropping positions are calculated and adjusted, so that the ink drop volume is determined, uniformity of the volume is ensured, and the ink jet printing precision of the equipment is improved.

Description

technical field [0001] The present invention relates to the field of display technology, and more particularly, to an inkjet printing nozzle, a system and method for measuring inkjet volume, and a method for controlling inkjet volume. Background technique [0002] More and more manufacturers pay attention to the production of OLED products by printing, and it has become the focus of each factory's development. The use of inkjet printing to produce OLED display products has the advantages of high material utilization and short production time. However, this method also has relatively high requirements for the printing position accuracy of the device and the ink volume accuracy. If the printing position accuracy is not enough, ink droplets cannot enter the pixels, and if the printing volume accuracy is not enough, uneven display will occur. Due to the difference in the volume of ink ejected, it is easy to cause uneven brightness of the display and various traces (mura). In or...

Claims

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Application Information

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IPC IPC(8): B41J2/135B41J2/10
CPCB41J2/10B41J2/135B41J2/2135H10K71/135
Inventor 赵德江
Owner BOE TECH GRP CO LTD
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