ANTI-COUNTERFEITING METHODS AND DEVICES USING SUBSTANTIALLY TRANSPARENT FLUORESCENT MATERIALS

• US 20100062194A1
• Filed: 09/04/2009
• Published: 03/11/2010
• Est. Priority Date: 09/04/2008
• Status: Abandoned Application

• Current Assignee: Xiao-Dong Sun
• Original Assignee: Xiao-Dong Sun
• Inventors: Sun, Xiao-Dong
• Application Number:
  US12/554,866
• Publication Number:
  US 20100062194A1
• Time in Patent Office: Days
• US Class Current: 428/29
• CPC Class Codes: B42D 25/00 Information-bearing cards or sheet-like structures characterised by identification or security features; Manufacture thereof printing processes to produce identification or security features B41M3/14
• CPC Class Codes: B42D 25/387 absorbing or reflecting ultraviolet light

Abstract

Embodiments relate to light emitting material integrated into the apparatus having an anti-counterfeit pattern. The light emitting material may be configured to emit visible light in response to absorption of ultraviolet light. The light emitting material may include a plurality of light emitting particles, with each of the plurality of light emitting particles having a diameter less than about 500 nanometers. Accordingly, in embodiments, the anti-counterfeit pattern may be invisible under ambient light. However, under ultraviolet light, the authenticity of a product may be identified by emission of light in the form of the anti-counterfeit pattern. In embodiments, the anti-counterfeit pattern may be in the form of a bar code, a computer readable code, and/or a symbol that verifies the authenticity of a product.

Claims

1. An apparatus comprising light emitting material integrated into the apparatus having an substantially transparent anti-counterfeit pattern, wherein:

the light emitting material is configured to emit visible light in response to absorption of ultraviolet light;

the light emitting material comprises a plurality of light emitting particles; and

each of the plurality of light emitting particles has a diameter less than about 500 nanometers.

2. The apparatus of claim 1, wherein the ultraviolet light has a wavelength greater than 320 nanometers.

3. The apparatus of claim 1, wherein the light emitting material is fluorescent material.

4. The apparatus of claim 1, wherein each of the plurality of light emitting particles has a diameter less than about 400 nanometers.

5. The apparatus of claim 4, wherein each of the plurality of light emitting particles has a diameter less than about 300 nanometers.

6. The apparatus of claim 5, wherein each of the plurality of light emitting particles has a diameter less than about 200 nanometers.

7. The apparatus of claim 6, wherein each of the plurality of light emitting particles has a diameter less than about 100 nanometers.

8. The apparatus of claim 1, wherein the light emitting material comprises:

a first material configured to emit a first visible color in response to absorption of a first bandwidth of ultraviolet light; and

a second material configured to emit a second visible color in response to absorption of a second bandwidth of ultraviolet light, wherein the second visible color is different from the first visible color.

9. The apparatus of claim 8, wherein the first bandwidth of ultraviolet light and the second bandwidth of ultraviolet light are different.

10. The apparatus of claim 8, wherein the first bandwidth of ultraviolet light and the second bandwidth of ultraviolet light are within the range of about 0 nanometers to about 480 nanometers.

11. The apparatus of claim 10, wherein the first bandwidth of ultraviolet light and the second bandwidth of ultraviolet light are within the range of about 190 nanometers to about 460 nanometers.

12. The apparatus of claim 11, wherein the first bandwidth of ultraviolet light and the second bandwidth of ultraviolet light are within the range of about 300 nanometers to about 420 nanometers.

13. The apparatus of claim 8, wherein the light emitting material comprises a third material configured to emit a third visible color in response to absorption of a third bandwidth of ultraviolet light, wherein the third visible color is different from the first visible color and the second visible color.

14. The apparatus of claim 13, wherein the first visible color, the second visible color, and the third visible color are primary colors.

15. The apparatus of claim 1, wherein the anti-counterfeit pattern is integrated into a product.

16. The apparatus of claim 1, wherein the anti-counterfeit pattern is integrated into the packaging of the product.

17. The apparatus of claim 1, wherein the anti-counterfeit pattern is invisible under ambient light.

18. The apparatus of claim 17, wherein the anti-counterfeit pattern overlays a visible pattern.

19. The apparatus of claim 18, wherein the anti-counterfeit pattern is a logo.

20. The apparatus of claim 18, wherein the anti-counterfeit pattern is at least one of a bar code, a computer readable code, and a symbol that verifies the authenticity of a product.