Securable cover with electrically activatable light inhibiting lens for vehicle lights

• US 8,256,940 B2
• Filed: 09/16/2009
• Issued: 09/04/2012
• Est. Priority Date: 09/16/2009
• Status: Active Grant

• Current Assignee: Control Solutions Incorporated (ADAMA Ltd.)
• Original Assignee: Control Solutions Incorporated (ADAMA Ltd.)
• Inventors: Brown, Alyn, Wiff, James
• Primary Examiner(s): Ton, Anabel
• Application Number:
  US12/560,861
• Publication Number:
  US 20110063864A1
• Time in Patent Office: 1,084 Days
• Field of Search: 362/509, 362/464, 701/36, 359265-275, 359/296
• US Class Current: 362/509
• CPC Class Codes: F21S 41/645 by electro-optic means, e.g. liquid crystal or electrochromic devices
• CPC Class Codes: F41H 5/0407 Transparent bullet-proof laminatesinformative reference: layered products essentially comprising glass in general B32B17/06, e.g. B32B17/10009; manufacture or composition of glass, e.g. joining glass to glass C03; permanent multiple-glazing windows, e.g. with spacing therebetween, E06B3/66
• CPC Class Codes: F41H 5/26 Peepholes; Windows; Loopholesmanufacture or composition of glass C03; Covers therefor informative reference: transparent bullet-proof laminates F41H5/0407; layered products essentially comprising glass B32B17/06

Abstract

A cover for use in connection with a vehicle light having a light source and a light reflector is provided. A lens of the cover has an electrically activatable material switchable between a light inhibiting state and a light transmissive state. The electrically activatable material prevents the transmission of visible light from entering into and reflecting out from the vehicle light when the electrically activatable material is set to the light inhibiting state. The lens has an area without having the electrically activatable material such that visible light from the light source is also to pass through the area. A baffle having the electrically activatable material extends from the body of the lens. The baffle blocks a portion of the visible light that passes through the area of the lens from traveling in certain directions when the electrically activatable material is in the light inhibiting state.

Claims

1. A cover for use in connection with a vehicle light, the vehicle light having a light source and a light reflector, comprising:

a lens having an electrically activatable material switchable between a light inhibiting state and a light transmissive state, the electrically activatable material prevents the transmission of visible light from entering into and reflecting out from the vehicle light when the electrically activatable material is set to the light inhibiting state;

the lens having an area without the electrically activatable material such that visible light from the light source is able to pass through the area; and

a baffle extending from a body of the lens, the baffle comprising the electrically activatable material such that the baffle blocks a portion of the visible light that passes through the area of the lens when the electrically activatable material is in the light inhibiting state.

2. The cover of claim 1 wherein the electrically activatable material comprises at least one layer of electrochromatic film.

3. The cover of claim 2 wherein the at least one layer of electrochromatic film is affixed to at least one layer of a transparent material of the lens.

4. The cover of claim 3 wherein the transparent material is a glass or a polycarbonate material.

5. The cover of claim 4 wherein the transparent material is glass material comprising at least one of:

(a) plexiglass; and

(b) bullet resistant glass.

6. The cover of claim 2 wherein the electrochromatic film is disposed between layers of transparent material of the lens.

7. The cover of claim 6 wherein the lens is housed in a bezel adapted to be removably affixed to the vehicle light.

8. The cover of claim 2 further comprising a coupling device adapted to electrically couple, at least in part, the electrically activatable material to an electrical power source;

and

an actuator adapted to prompt switching of the electrically activatable material of the lens between the light inhibiting state and the light transmissive state.

9. The cover of claim 8 wherein the area without the electrically activatable material further comprises a slot opening of the lens.

10. The cover of claim 9 wherein the baffle is integral with the lens.

11. The cover of claim 10 wherein the baffle further comprises a substantially vertical wall spaced apart from the body of the lens wherein the substantially vertical wall is adapted to block visible light when the electrically activatable material is in the light inhibiting state.

12. The cover of claim 11 wherein the baffle further comprises a lateral partition that connects the substantially vertical wall to the body of the lens and wherein the lateral partition is adapted to block visible light when the electrically activatable material is in the light inhibiting state.

13. The cover of claim 12 wherein the substantially vertical wall of the baffle is spaced apart from and aligned in a substantially parallel direction with the slot opening.

14. The cover of claim 13 wherein the length of the substantially vertical wall is greater than the length of the slot opening.

15. The cover of claim 13 wherein a bottom end of the slot opening is positioned above a bottom end of the substantially vertical wall of the baffle.

16. The cover of claim 13 wherein only a portion of reflected light that has reflected off the light reflector from the light source exits the lens through the slot opening and an opening between the substantially vertical wall of the baffle and a lower wall of the body of the lens.

17. The cover of claim 8 wherein the baffle is adapted to block light rays originating from the light source from traveling in a generally upward and forward direction from the vehicle when the electrically activatable material is set to the light inhibiting state.

18. The cover of claim 8 wherein the lens and the baffle block external ambient light from traveling into the vehicle light to prevent the external ambient light from reflecting off the light reflector when the electrically activatable material is set to the light inhibiting state.

19. The cover of claim 1 wherein the electrically activatable material comprises at least one of:

(a) suspended particle device (SPD) material;

(b) liquid crystal display (LCD) material; and

(c) phase dispersed liquid crystals (PDLCs).

20. The cover of claim 1 wherein the vehicle light is a military combat vehicle light or a security vehicle light.

21. The cover of claim 20 wherein the electrically activatable material is adapted to selectively pass light of a particular spectrum and block out light at wavelengths outside of the spectrum.

22. The cover of claim 21 wherein the electrically activatable material selectively passes light ranging from 700 nanometers to 1200 nanometers.

23. The cover of claim 20 wherein the electrically activatable material becomes opaque upon being electrically energized and the electrically activatable material becomes transparent upon being electrically de-energized.

24. The cover of claim 23 wherein the electrically activatable material becomes electrically energized upon reaching a voltage potential threshold such that the lens having the baffle does not allow the transmission of ambient light into the light reflector of the vehicle light when the electrically activatable material is electrically energized.

25. The cover of claim 23 wherein the electrically activatable material of the lens and the baffle is adapted to block the transmission of ambient light from entering the vehicle light upon being electrically energized.

26. The cover of claim 20 wherein the electrically activatable material becomes opaque upon being electrically de-energized and the electrically activatable material becomes transparent upon being electrically energized.

27. The cover of claim 26 wherein the electrically activatable material becomes electrically de-energized upon reaching of a voltage potential threshold such that the lens having the baffle does not allow the transmission of ambient light into the light reflector of the vehicle light when the electrically activatable material is electrically de-energized.

28. The cover of claim 26 wherein the electrically activatable material of the lens and the baffle is adapted to block the transmission of ambient light from entering the vehicle light upon being electrically de-energized.

29. The cover of claim 20 wherein the actuator is positioned at a control panel within the vehicle and wherein the actuator comprises at least one of:

(a) a switch;

(b) panel touch screen;

(c) button; and

(d) sensor.

30. The cover of claim 20 wherein the actuator comprises at least one of:

(a) a hardwired switch;

(b) a software switch; and

(c) wireless control.

31. The cover of claim 20 wherein the electrical power source comprises at least one of:

(a) vehicle power coupled with a control panel of the vehicle;

(b) a vehicle battery coupled with the control panel of the vehicle; and

(c) an accessory battery coupled with the control panel, the control panel adapted to re-charge the accessory battery based on conditions of a vehicle battery.

32. The cover of claim 20 wherein the lens is secured to the light reflector of the vehicle light.

33. A method of utilizing a cover for use in connection with a vehicle light, the vehicle light having a light source and a light reflector, comprising:

providing a lens having an electrically activatable material switchable between a light inhibiting state and a light transmissive state, the electrically activatable material prevents the transmission of visible light from entering into and reflecting out from the vehicle light when the electrically activatable material is set to the light inhibiting state;

providing an area of the lens without the electrically activatable material such that the visible light from the light source is able to pass through the area; and

extending a baffle from a body of the lens, the baffle comprising the electrically activatable material such that the baffle is adapted to block a portion of the visible light that passes through the area of the lens when the electrically activatable material is in the light inhibiting state.

34. The method of claim 33 wherein the electrically activatable material comprises at least one layer of electrochromatic film and further comprising:

affixing the at least one layer of electrochromatic film to at least one layer of transparent material of the lens.

35. The method of claim 34 further comprising disposing the electrochromatic film between layers of transparent material of the lens.

36. The method of claim 33 further comprising electrically coupling, at least in part, the electrically activatable material to an electrical power source;

and

switching the electrically activatable material between the light inhibiting state and the light transmissive state.

37. The method of claim 36 further comprising electrically activating the electrically activatable material from a crew compartment of the vehicle.

38. The method of claim 36 further comprising permanently securing the lens to the light reflector of the vehicle light.

39. The method of claim 36 wherein the area without the electrically activatable material further comprises a slot opening of the lens and wherein the baffle is integral with the lens.

40. The method of claim 39 further comprising providing a substantially vertical wall spaced apart from the body of the lens wherein the substantially vertical wall is adapted to block visible light when the electrically activatable material is in the light inhibiting state.

41. The method of claim 40 further comprising blocking visible light with a lateral partition of the baffle when the electrically activatable material is in the light inhibiting state, the lateral partition connects the substantially vertical wall to the body of the lens.

42. The method of claim 41 further comprising spacing the substantially vertical wall of the baffle apart from and in a substantially parallel direction with the slot opening.

43. The method of claim 42 further comprising positioning a bottom end of the slot opening above a bottom end of the substantially vertical wall of the baffle.

44. The method of claim 42 further comprising permitting only a portion of reflected light that has reflected off the light reflector from the light source to exit the lens through the slot opening and an opening between the substantially vertical wall of the baffle and a lower wall of the body of the lens.

45. The method of claim 36 further comprising blocking, with the baffle, light rays originating from the light source from traveling in a generally upward and forward direction from the vehicle when the electrically activatable material is set to the light inhibiting state.

46. The method of claim 33 wherein the electrically activatable material comprises at least one of:

(a) suspended particle device (SPD) material;

(b) liquid crystal display (LCD) material; and

(c) phase dispersed liquid crystals (PDLCs).