Light blocking apparatus for vehicle mirror assembly

• US 8,432,600 B2
• Filed: 07/30/2009
• Issued: 04/30/2013
• Est. Priority Date: 07/30/2009
• 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): Martinez, Joseph P
• Application Number:
  US12/512,858
• Publication Number:
  US 20110026092A1
• Time in Patent Office: 1,370 Days
• Field of Search: 359/265, 359/267, 359/263, 359/884, 349/113
• US Class Current: 359/263
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: G02F 1/1334 based on polymer dispersed liquid crystals, e.g. microencapsulated liquid crystals
• CPC Class Codes: G02F 1/133553 Reflecting elements associated to illuminating devices G02F1/133605
• CPC Class Codes: G02F 1/157 Structural association of cells with optical devices, e.g. reflectors or illuminating devices

Abstract

A mirror assembly is provided having a mirror for use in connection with a vehicle, such as a military combat vehicle. An electrically activatable material is positioned at the mirror of the vehicle. The electrically activatable material prevents the reflectivity of visible light off the mirror when the electrically activatable material is switched to a light-blocking state. A coupling device electrically couples the electrically activatable material to an electrical power source. An actuation device is adapted to switch the electrically activatable material of the vehicle mirror assembly to the light-blocking state in response to user operation such that the electrically activatable material prevents the reflectivity of visible light off the vehicle mirror to reduce the observability of the vehicle mirror.

Claims

1. A mirror assembly for a vehicle, the mirror assembly having a mirror with a reflective surface, comprising:

an electrically activatable material positioned at the mirror in which the electrically activatable material prevents the reflectivity of visible light off the mirror when the electrically activatable material is in a light-blocking state, wherein the electrically activatable material comprises at least one layer of electrochromatic film;

a coupling device adapted to electrically couple, at least in part, the electrically activatable material to an electrical power source, wherein the electrical power source comprises at least one of vehicle power, a vehicle battery, and an accessory battery coupled to the vehicle battery; and

an actuator adapted to switch the electrically activatable material to the light-blocking state such that the electrically activatable material prevents the reflectivity of visible light off the vehicle mirror to reduce the observability of the vehicle mirror.

2. The mirror assembly of claim 1 wherein the at least one layer of electrochromatic film is positioned at a front portion of the reflective surface of the mirror.

3. The mirror assembly of claim 1 wherein the at least one layer of electrochromatic film is positioned between a front clear substrate material and the reflective surface of the mirror.

4. The mirror assembly of claim 1 wherein the mirror assembly is configured to be attached to a military combat vehicle or a security vehicle and 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).

5. The mirror assembly of claim 4 wherein the electrically activatable material is adapted to block out substantially all ambient light from reflecting off the mirror.

6. The mirror assembly of claim 4 wherein the electrically activatable material is adapted to selectively pass light of a particular spectrum to the reflective surface of the mirror for reflection and block out light at wavelengths outside the spectrum.

7. The mirror assembly of claim 4 wherein the electrically activatable material is adapted to selectively pass infrared light to be reflected off the reflective surface of the mirror.

8. The mirror assembly of claim 7 wherein the electrically activatable material selectively passes light ranging from 700 nanometers to 1200 nanometers.

9. The mirror assembly of claim 1 wherein the electrically activatable material further comprises a layer of electrochromatic material overlying one portion of the mirror such that substantially all ambient light is blocked from reflecting off the one portion of the mirror when the layer of electrochromatic material is in the light-blocking state and wherein the mirror has another, portion without a layer of electrochromatic material in which the other portion is adapted to continuously reflect ambient light.

10. The mirror assembly of claim 1 wherein the electrically activatable material becomes opaque upon being electrically energized and the electrically activatable material becomes transparent upon being electrically de-energized.

11. The mirror assembly of claim 10 wherein the electrically activatable material becomes electrically energized upon reaching a voltage potential threshold such that the electrically activatable material does not allow the reflectivity of ambient light off the reflective surface of the mirror when the electrically activatable material is energized.

12. The mirror assembly of claim 10 wherein the electrically activatable material is adapted to block ambient light from reflecting off the mirror upon being electrically energized.

13. The mirror assembly of claim 1 wherein the electrically activatable material becomes opaque upon being electrically de-energized and the electrically activatable material becomes transparent upon being electrically energized.

14. The mirror assembly of claim 13 wherein the electrically activatable material becomes electrically de-energized upon removal of a voltage potential threshold such that the electrically activatable material does not allow the reflectivity of ambient light off the reflective surface of the mirror when the electrically activatable material is electrically de-energized.

15. The mirror assembly of claim 13 wherein the electrically activatable material is adapted to block ambient light from reflecting off the mirror upon being electrically de-energized.

16. The mirror assembly of claim 1 wherein the actuation device is positioned adjacent to the mirror.

17. The mirror assembly of claim 1 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.

18. The mirror assembly of claim 1 wherein the actuator comprises at least one of:

(a) a hardwired switch;

(b) a software switch; and

(c) wireless control.

19. The mirror assembly of claim 1 wherein the at least one of the vehicle power, the vehicle battery, and the accessory battery is coupled with a control panel of the vehicle.

20. The mirror assembly of claim 1 wherein the electrical power source comprises the accessory battery and wherein the accessory battery is coupled with the control panel, the control panel is adapted to re-charge the accessory battery based on conditions of a vehicle battery.

21. A mirror assembly for a vehicle, comprising:

an electrically activatable mirror having an electrically activatable material in which the electrically activatable material is switchable between a light-transmissive state and a reflective state wherein, in the light-transmissive state, light is blocked after passing through the electrically activatable material such that light is not reflected off the mirror;

a coupling device adapted to 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 mirror of the vehicle between the light-transmissive state and the reflective state.

22. The mirror assembly of claim 21 wherein the electrically activatable material acts as a switchable mirror such that the switchable mirror allows light to pass when switched to the light-transmissive state and reflects light to be reflected off the switchable mirror when switched to the reflective state.

23. The mirror assembly of claim 22 wherein the switchable mirror switches from being reflective in a de-energized state to being light-transmissive in an energized state.

24. The mirror assembly of claim 22 wherein the switchable mirror switches from being light-transmissive in a de-energized state to being reflective in an energized state.

25. The mirror assembly of claim 22 wherein the mirror assembly is configured to be attached to a military combat vehicle or a security vehicle and wherein the electrically activatable mirror further comprises a light-absorbing layer and in which the electrically activatable material is positioned adjacent to the light absorbing material.

26. The mirror assembly of claim 25 wherein the electrically activatable mirror further comprises a clear cover layer, the electrically activatable material is positioned between the clear cover layer and the light-absorbing layer of the electrically activatable mirror.

27. The mirror assembly of claim 26 wherein the clear cover layer is formed of transparent glass or plastic.

28. The mirror assembly of claim 26 wherein the electrically activatable material functions as a mirror when switched to the reflective state such that incident light passes through the clear cover layer to reflect off the electrically activatable material.

29. The mirror assembly of claim 28 wherein the electrically activatable material becomes transparent when switched to the light-transmissive state such that incident light passes through the clear cover layer and through the electrically activatable material to be absorbed by the light-absorbing material.

30. The mirror assembly of claim 22 wherein the electrically activatable material becomes electrically energized upon reaching a voltage potential threshold such that the electrically activatable material becomes light-transmissive when energized.

31. The mirror assembly of claim 22 wherein the electrically activatable material becomes electrically de-energized upon removal of a voltage potential threshold such that the electrically activatable material becomes light-transmissive upon being electrically de-energized.

32. The mirror assembly of claim 22 wherein the actuator is positioned adjacent to the mirror.

33. The mirror assembly of claim 22 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.

34. The mirror assembly of claim 22 wherein the actuator comprises at least one of:

(a) a hardwired switch;

(b) a software switch, or (c) wireless control.

35. The mirror assembly of claim 22 wherein the electrical power source comprises vehicle power and wherein the vehicle power is coupled with a control panel of the vehicle.

36. The mirror assembly of claim 22 wherein the electrical power source comprises a vehicle battery and wherein the vehicle battery is coupled with a control panel of the vehicle.

37. The mirror assembly of claim 22 wherein the electrical power source comprises an accessory battery and wherein the accessory battery is coupled with the control panel, the control panel is adapted to re-charge the accessory battery based on conditions of a vehicle battery.

38. A method of blocking visible light from reflecting off a reflective surface of a mirror in a mirror assembly for a vehicle, comprising:

providing an electrically activatable material at the mirror, the electrically activatable material prevents the reflectivity of visible light off the mirror when the electrically activatable material is in a light-blocking state, wherein the electrically activatable material comprises at least one layer of electrochromatic film;

coupling, at least in part, the electrically activatable material to an electrical power source, wherein the electrical power source comprises at least one of vehicle power, a vehicle battery, and an accessory battery coupled to the vehicle battery; and

switching the electrically activatable material from a light-transmissive state to the light-blocking state such that, in the light-blocking state, the electrically activatable material prevents the reflectivity of visible light off the vehicle mirror to reduce observability of the vehicle mirror.

39. The method of claim 38 further comprising positioning the at least one layer of electrochromatic film at a front portion of the reflective surface of the mirror.

40. The method of claim 38 further comprising positioning the at least one layer of electrochromatic film between a front clear substrate material and the reflective surface of the mirror.

41. The method of claim 38 wherein the mirror assembly is configured to be attached to a military combat vehicle or a security vehicle and 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).

42. The method of claim 41 further comprising blocking out substantially all ambient light from reflecting off the mirror.

43. The method of claim 41 further comprising selectively passing light of a particular spectrum to the reflective surface of the mirror for reflection, and

blocking out light at wavelengths outside the spectrum.

44. The method of claim 41 further comprising selectively passing infrared light to be reflected off the reflective surface of the mirror.

45. The method of claim 44 further comprising selectively passing light ranging from 700 nanometers to 1200 nanometers.

46. The method of claim 38 further comprising substantially blocking all ambient light from reflecting off one portion of the mirror when the electrochromatic material is in the light-blocking state, and

continuously reflecting ambient light off another portion of the mirror.

47. The method of claim 38 further comprising electrically energizing the electrically activatable material such that the electrically activatable material becomes opaque, and

de-energizing the electrically activatable material such that the electrically activatable material becomes transparent.

48. The method of claim 38 further comprising electrically de-energizing the electrically activatable material such that the electrically activatable material becomes opaque, and

electrically energizing the electrically activatable material such that the electrically activatable material becomes transparent.

49. The method of claim 38 further comprising coupling at least one of vehicle power, the vehicle battery, and the accessory battery with a control panel of the vehicle.

50. The method of claim 38 wherein the electrical power source comprises the accessory battery and further comprising coupling the accessory battery with a control panel of the vehicle, and

recharging the accessory battery based on conditions of the vehicle battery.

51. A method of utilizing a mirror assembly for a vehicle, comprising:

providing an electrically activatable mirror having an electrically activatable material in which the electrically activatable material is switchable between a light-transmissive state and a reflective state wherein, in the light-transmissive state, light is blocked after passing through the electrically activatable material such that the light is not reflected off the mirror;

coupling, at least in part, the electrically activatable material to an electrical power source; and

switching the electrically activatable material of the mirror of the vehicle between the light-transmissive state and the reflective state.

52. The method of claim 51 wherein the electrically activatable material acts as a switchable mirror, and further comprising

allowing light to pass when the switchable minor is switched to the light-transmissive state, and

reflecting light off the switchable minor when switched to the reflective state.

53. The method of claim 52 further comprising switching the switchable minor from being reflective in a de-energized state to being light-transmissive in an energized state.

54. The method of claim 52 further comprising switching the switchable minor from being light-transmissive in a de-energized state to being reflective in an energized state.

55. The method of claim 52 wherein the electrically activatable minor is used in connection with a military combat vehicle or a security vehicle and further comprising

positioning the electrically activatable material adjacent to a light-absorbing material.

56. The method of claim 55 further comprising positioning the electrically activatable material between a clear cover layer and the light-absorbing layer of the electrically activatable mirror.

57. The method of claim 56 further comprising prompting the electrically activatable material to function as a mirror when switched to the reflective state such that incident light passes through the clear cover layer to reflect off the electrically activatable material.

58. The method of claim 57 further comprising prompting the electrically activatable material to become transparent when switched to the light-transmissive state such that incident light passes through the clear cover layer and through the electrically activatable material to be absorbed by the light-absorbing material.

59. The method of claim 52 wherein the electrical power source comprises vehicle power and further comprising coupling the vehicle power with a control panel of the vehicle.

60. The method of claim 52 wherein the electrical power source comprises a vehicle battery and further comprising coupling the vehicle battery with a control panel of the vehicle.

61. The method of claim 52 wherein the electrical power source comprises an accessory battery and further comprising coupling the accessory battery with the control panel, and

recharging the accessory battery based on conditions of the vehicle battery.