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A Novel Application of Ink-Jet Printing Technology on Manufacturing Color Filter for Liquid Crystal Display

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An ink-jet printing apparatus was setup to manufacture color filters. The apparatus includes a X-Y- table supporting the substrate, and a set of drop-on-demand ink-jet heads arranged on the adjustable Z-axis for coloring the filter elements. The mechanical motor drivers provide movements for the relative displacement of the substrate with respect to the ink-jet head. A processing of making color filter is discharging the predetermined color ink to the substrate, and then drying the discharged ink to form the color filter pattern. To reduce defective products caused by variance on drop position, this apparatus is additionally equipped with an optical system to detect the substrate position. This system has verified the printing behavior of three commercial print heads, HP51626A, HP51629A, and HP51645A. An image observation of the drop spot center position deviation and spot size deviation were performed. The results show the deviation range of a drop spot is within 4.01 μm, 4.10 μm, and 4.75 μm for HP51626A, HP51629A, and HP51645A, separately. This observation suggests the distance between the substrate and printhead should be closer to hide the satellite spot within main spot. In addition, the drop spot profile needs further study in order to improve its distribution characteristic on a filter element.

Document Type: Research Article

Publication date: January 1, 2001

More about this publication?
  • For more than 25 years, NIP has been the leading forum for discussion of advances and new directions in non-impact and digital printing technologies. A comprehensive, industry-wide conference, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems, including drop-on-demand ink jet, wide format ink jet, desktop and continuous ink jet, toner-based electrophotographic printers, production digital printing systems, and thermal printing systems, as well as the engineering capability, optimization, and science involved in these fields.

    Since 2005, NIP has been held in conjunction with the Digital Fabrication Conference.

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