Method of minimizing absorption of visible light in ink compositions comprising infrared metal-dithiolene dyes

• US 7,465,342 B2
• Filed: 04/02/2004
• Issued: 12/16/2008
• Est. Priority Date: 04/07/2003
• Status: Expired due to Fees

• Current Assignee: BASF SE
• Original Assignee: Silverbrook Research Pty Limited
• Inventors: Hall, Lachlan Everett, Silverbrook, Kia, Vonwiller, Simone Charlotte, Starling, Scott Matthew, Papadakis, Alexandra Artemis, Lapstun, Paul, Ridley, Damon Donald
• Primary Examiner(s): Shah; Manish S
• Assistant Examiner(s): Martin; Laura E
• Application Number:
  US10/815,628
• Publication Number:
  US 20040196345A1
• Time in Patent Office: 1,719 Days
• Field of Search: 347/100
• US Class Current: 106/31.13
• CPC Class Codes: G06F 3/014 Hand-worn input/output arrangements, e.g. data gloves
• CPC Class Codes: G06F 3/0321 by optically sensing the absolute position with respect to a regularly patterned surface forming a passive digitiser, e.g. pen optically detecting position indicative tags printed on a paper sheet constructional details of pen-shaped pointing devices G06F3/03545, G06F3/03542, G06F3/037
• CPC Class Codes: G06K 7/10554 Moving beam scanning
• CPC Class Codes: G06K 7/10623 Constructional details
• CPC Class Codes: G06K 7/10693 for omnidirectional scanning
• CPC Class Codes: G06K 7/10722 Photodetector array or CCD scanning
• CPC Class Codes: G06K 7/10772 Moved readers, e.g. pen, wand
• CPC Class Codes: G06Q 10/00 Administration; Management
• CPC Class Codes: G06Q 10/087 Inventory or stock management, e.g. order filling, procurement or balancing against orders
• CPC Class Codes: G06Q 20/20 Point-of-sale [POS] network systems
• CPC Class Codes: G06Q 30/02 Marketing; Price estimation or determination; Fundraising
• CPC Class Codes: G06Q 30/0207 Discounts or incentives, e.g. coupons or rebates
• CPC Class Codes: G06Q 30/0212 Chance discounts or incentives
• CPC Class Codes: G06Q 30/0217 involving input on products or services in exchange for incentives or rewards
• CPC Class Codes: G06Q 30/0236 Incentive or reward received by requiring registration or ID from user
• CPC Class Codes: G06Q 30/0259 based on store location
• CPC Class Codes: G06Q 30/0267 Wireless devices
• CPC Class Codes: G06Q 30/0601 Electronic shopping [e-shopping]
• CPC Class Codes: H04N 25/59 by controlling the amount of charge storable in the pixel, e.g. modification of the charge conversion ratio of the floating node capacitance
• CPC Class Codes: H04N 25/671 for non-uniformity detection or correction
• CPC Class Codes: H04N 25/745 : Circuitry for generating timing or clock signals
• CPC Class Codes: H04N 25/75 : Circuitry for providing, modifying or processing image signals from the pixel array
• CPC Class Codes: H04N 25/767 : Horizontal readout lines, multiplexers or registers
• CPC Class Codes: H04N 25/778 : comprising amplifiers shared between a plurality of pixels, i.e. at least one part of the amplifier must be on the sensor array itself
• CPC Class Codes: H04N 3/1568 : for disturbance correction or prevention within the image-sensor, e.g. biasing, blooming, smearing correction circuits H04N25/62
• CPC Class Codes: H04N 5/33 : Transforming infrared radiation cameras or camera modules for generating image signals from infrared radiation H04N23/20; circuitry of SSIS for transforming infrared radiation into image signals H04N25/20

Abstract

A method of minimizing absorption of visible light in an ink composition. The ink composition includes an IR-absorbing metal-dithiolene dye. The method includes preselecting the dye such that it includes a moiety for reducing intermolecular interactions between adjacent dye molecules. The method is suitable for use in connection with page-based interactive systems employing invisible inks.

Claims

1. A method of minimizing absorption of visible light in an ink composition comprising an IR-absorbing metal-dithiolene dye, wherein the dye is preselected from a metal-dithiolene of formula (II):

2. The method of claim 1, wherein M is Ni.

3. The method of claim 1, wherein j is 1 and k is 2.

4. The method of claim 1, wherein said dye comprises a —

C(C_1-4alkyl)₂-bridging group.

5. The method of claim 1, wherein n is 1.

6. The method of claim 1, wherein W is a substituent comprising a group of formula —

CO₂Z, —

SO₃Z, —

OSO₃Z, —

PO₃Z or —

OPO₃Z, wherein Z is H or a water-soluble cation.

7. The method of claim 6, wherein W is of formula —

(CH₂)_t—

SO₃Z, wherein t is 0 or an integer from 1 to 6, and Z is H or a water-soluble cation.

8. The method of claim 6, wherein W is of formula —

CH₂SO₃H, —

CH₂SO₃Na or —

CH₂SO₃K.