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Multicolor display device

A display and emission device technology, applied in the field of multi-color display devices

Inactive Publication Date: 2000-01-19
THE TRUSTEES FOR PRINCETON UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the fluorescent media in such devices are deposited using patterning techniques such as photolithography which are expensive to implement

Method used

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Examples

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example 1

[0044] Example 1: Creating a Passive Image with UV Backlighting

[0045] To print fluorescent images or pixel arrays with an inkjet printer or other ink delivery system, the ink is first prepared to match the optimum viscosity with the other resolution characteristics of the selected printer. These inks consist of a carrier solvent, about 1-10 wt% of a matrix material and 0.001-0.05 wt% of a fluorescent dye. The dye is chosen to achieve the desired color (typically red, green or blue) and the matrix material is chosen to give a stable film that supports the dye and prevents aggregation. The press's three reservoirs are filled with red, green and blue inks. Images are printed directly onto polymer or glass substrates. The various inks are mixed at each pixel by the inkjet printer as needed to achieve the proper color. The brightness of each pixel can be adjusted by changing the amount of ink deposited on each pixel. A small amount of ink will allow most of the irradiating l...

example 2

[0046] Example 2. Generation of Passive Image Using OLED Backlighting

[0047] To print fluorescent images or pixel arrays with an inkjet printer or other ink delivery system, the ink is first prepared to match the optimum viscosity with the other resolution characteristics of the selected printer. These inks consist of a carrier solvent, about 1-10 wt% of a matrix material and 0.001-0.05 wt% of a fluorescent dye. The dye is chosen to achieve the desired color (typically red, green or blue) and the matrix material is chosen to give a stable film that supports the dye and prevents aggregation. The press's three reservoirs are filled with red, green and blue inks, and the image is printed directly on a polymer or glass substrate. The various inks are mixed at each pixel by the inkjet printer as needed to achieve the proper color. The color of each pixel is directly determined by the ratio of the respective red, green and blue inks. The thickness of the fluorescent film will b...

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Abstract

A multicolor display device includes a transparent substrate (22), red and green fluorescent dyes (21) ink jet printed onto the substrate, a conductive layer (23) deposited over the red and green dye, an organic blue light emitting layer (24) deposited over the conductive layer, and an electrical contact deposited onto the blue light emitting layer.

Description

field of invention [0001] The present invention relates to display devices, and more particularly to multicolor display devices having fluorescent dyes deposited by inkjet printing. background of the invention [0002] It is well known that display devices utilizing fluorescent media absorb light and emit light at longer wavelengths. See, for example, US Patent 5,294,870 to Tang et al. entitled "Organic Electroluminescent Multicolor Image Display Device," which is incorporated herein by reference. However, the phosphor medium in such devices is deposited using patterning techniques such as photolithography which are expensive to implement. Therefore, there is a need for a method in which a fluorescent medium can be cheaply and accurately deposited on a substrate to produce a multi-color display device. Summary of the invention [0003] The invention relates to a display device comprising a substrate and a fluorescent dye deposited on the substrate. The present invention...

Claims

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Application Information

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IPC IPC(8): H05B33/12
Inventor 马克・E・汤普森斯蒂芬・R・弗里斯特
Owner THE TRUSTEES FOR PRINCETON UNIV
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