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Ink-Jet Printing Technology on Manufacturing Color Filter for Liquid Crystal Display Part I: Ink-Jet Manufacturing Processes

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A manufacturing process is developed to make color filter by discharging the predetermined color ink to the substrate, and then curing the discharged ink to form the color filter pattern. In this paper, an ink-jet printing apparatus with drop on demand multi-nozzle heads was set up 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 special inks invested by ITRI (Industrial Technology Research Institute, Taiwan), by using this system with OES self developed print head, a strip-type color filter (pixel size 113 μm * 339 μm, with 20 μm black matrix width) made by ink-jet printing method is achieved. The color coordinates of three colors (red, green and blue) on the chromaticity diagram are (0.64, 0.35), (0.31, 0.52) and (0.13, 0.13). The transmittance for red, green and blue is 90%, 80%, and 85%, respectively. Compare with commercial standard, the heat, light and chemical test results come to ΔE <5 for each color, but the alkali tests (5% NaOH & KOH) are not satisfactory. Further study to improve the ink formula is needed.
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Document Type: Research Article

Publication date: 01 January 2003

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  • For more than 30 years, IS&T's series of digital printing conferences have been the leading forum for discussion of advances and new directions in 2D and 3D printing technologies. A comprehensive, industry-wide conference that brings together industry and academia, this meeting includes all aspects of the hardware, materials, software, images, and applications associated with digital printing systems?particularly those involved with additive manufacturing and fabrication?including bio-printing, printed electronics, page-wide, drop-on-demand, desktop and continuous ink jet, toner-based systems, and production digital printing, as well as the engineering capability, optimization, and science involved in these fields. In 2016, the conference changed its name formally to Printing for Fabrication to better reflect the content of the meeting and the evolving technology of printing.

    Please note: For purposes of its Digital Library content, IS&T defines Open Access as papers that will be downloadable in their entirety for free in perpetuity. Copyright restrictions on papers vary; see individual paper for details.

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