Optical filter and display using the same

A technology of filters and appliances, applied in the fields of filters, optics, instruments, etc., can solve problems such as filters that have not yet been found

Inactive Publication Date: 2006-06-21
DAI NIPPON PRINTING CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] As mentioned above, in the past, even if the light absorbing ability with a wavelength of 800nm-1100nm and the light absorbing function near 590nm can be temporarily exhibited in one layer, it is difficult to make it last for a long time. As far as the inventors know, no practical application has been found. unique, durable filter

Method used

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  • Optical filter and display using the same
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  • Optical filter and display using the same

Examples

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Embodiment

[0170] Examples and comparative examples are given below to further specifically illustrate the present invention. These descriptions are not intended to limit the present invention. In the following, Ph represents a phenyl group, and Pc represents a phthalocyanine.

Synthetic example 1

[0171] Synthesis example 1: Synthesis of phthalocyanine dye (A)

[0172] In a 250ml four-necked flask, charge 20g (34 mmol) of 3-phenoxy-4,5-bis(2,5-dichlorophenoxy)-6-fluorophthalonitrile, 2g (13 mmol) of vanadium trichloride and 30 ml of n-octanol were stirred at 170°C while bubbling nitrogen, and kept for about 4 hours. Cool to normal temperature afterwards, add 15g (136 mmol) PhCH 2 NH 2 and 120ml of benzonitrile, and incubated at 90°C for about 5 hours. The reaction solution was cooled, and it was precipitated by the phthalonitrile method, and then vacuum-dried to obtain 180g VOPc (2,5-Cl 2 PhO) 8 (PhO) 4 (PhCH 2 NH) 4 . The maximum absorption wavelength when the phthalocyanine-based dye (A) was dispersed in a polyester-based resin (Bylon 200, manufactured by Toyobo Co., Ltd.) was 878 nm.

Synthetic example 2

[0173] Synthesis Example 2: Synthesis of Phthalocyanine Pigment (B)

[0174] Use 1g (10 millimoles) cupric chloride to replace vanadium trichloride, in addition the synthetic same with compound (A), obtain 180g CuPc (2,5-Cl 2 PhO) 8 (PhO) 4 (PhCH 2 NH) 4 . The maximum absorption wavelength when the phthalocyanine dye (D) was dispersed in a polyester resin (Bylon 200, manufactured by Toyobo Co., Ltd.) was 810 nm.

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Abstract

The present invention relates to an optical filter comprising at least a pigment having a maximum absorption wavelength in the wavelength range of 800nm-1100nm and a pigment having maximum absorption wavelength in the wavelength range of 570-610nm in the same layer. The pigment layer of the pigment is characterized in that the pigment layer does not substantially contain two or more ionic pigment compounds having different cationic moieties. The invention also relates to a display in which the above-mentioned filter is arranged on the viewing side of the display. The present invention can provide a highly durable optical filter and a display in which the interaction between pigments is suppressed even if a plurality of pigments are mixed in the same pigment layer, and the spectral characteristics do not change even after long-term use.

Description

Background technique [0001] In recent years, research on electronic displays such as plasma displays (hereinafter referred to as "PDPs") has been vigorously developed. Near-infrared rays with a wavelength of 800nm-1100nm generated by the light emitters of these displays sometimes cause malfunctions of peripheral appliances using near-infrared rays, such as remote controls of home appliances. Therefore, it is indispensable to provide a near-infrared ray absorbing filter including a near-infrared ray-absorbing pigment in front of the display. Usually, as a component that absorbs near-infrared rays of the above-mentioned wavelengths, a pigment that absorbs near-infrared rays is generally used in these near-infrared-ray absorbing filters. [0002] The dyes that absorb near-infrared rays generally use anthraquinone-based dyes, naphthoquinone-based dyes, phthalocyanine-based dyes, squalyrium-based dyes, ginmonium-based dyes, dithiamol-based dyes, etc. (for example, JP-A-11-323121, ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G02B5/20H01J17/00
CPCG02B5/22
Inventor 中津川雄二
Owner DAI NIPPON PRINTING CO LTD
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