VEHICULAR VIDEO MIRROR SYSTEM

• US 20120140080A1
• Filed: 02/17/2012
• Published: 06/07/2012
• Est. Priority Date: 03/02/2000
• Status: Active Grant

• Current Assignee: Donnelly Corporation (Magna International Incorporated)
• Original Assignee: Donnelly Corporation (Magna International Incorporated)
• Inventors: Taylor, David W., McCarthy, Kevin C., Lynam, Niall R., Schofield, Kenneth
• Granted Patent: US 8,271,187 B2
• Time in Patent Office: Days
• US Class Current: 348/148
• CPC Class Codes: B60C 23/0408 transmitting the signals by non-mechanical means from the wheel or tyre to a vehicle body mounted receiver
• CPC Class Codes: B60N 2/976 massaging systems
• CPC Class Codes: B60Q 1/2665 on rear-view mirrors lighting devices for vehicle interior on or for rear-view mirrors B60Q3/258
• CPC Class Codes: B60Q 5/006 indicating risk of collision between vehicles or with pedestrians
• CPC Class Codes: B60Q 9/00 Arrangement or adaptation of signal devices not provided for in one of main groups B60Q1/00 - B60Q7/00 , e.g. haptic signalling
• CPC Class Codes: B60R 1/00 Optical viewing arrangements; Real-time viewing arrangements for drivers or passengers using optical image capturing systems, e.g. cameras or video systems specially adapted for use in or on vehicles
• CPC Class Codes: B60R 1/088 using a cell of electrically changeable optical characteristic, e.g. liquid-crystal or electrochromic mirrors
• CPC Class Codes: B60R 1/12 Mirror assemblies combined with other articles, e.g. clocks
• CPC Class Codes: B60R 1/28 with an adjustable field of view
• CPC Class Codes: B60R 11/04 Mounting of cameras operative during drive; Arrangement of controls thereof relative to the vehicle
• CPC Class Codes: B60R 2001/1215 with information displays
• CPC Class Codes: B60R 2001/1253 with cameras, video cameras or video screens
• CPC Class Codes: B60R 2300/105 using multiple cameras
• CPC Class Codes: B60R 2300/207 using multi-purpose displays, e.g. camera image and navigation or video on same display
• CPC Class Codes: B60R 2300/301 combining image information with other obstacle sensor information, e.g. using RADAR/LIDAR/SONAR sensors for estimating risk of collision
• CPC Class Codes: B60R 2300/406 using wireless transmission
• CPC Class Codes: B60R 2300/806 for aiding parking
• CPC Class Codes: B60R 2300/8066 for monitoring rearward traffic
• CPC Class Codes: B60R 2300/8093 for obstacle warning
• CPC Class Codes: G01C 21/20 Instruments for performing navigational calculations G01C21/24, G01C21/26 take precedence
• CPC Class Codes: G01C 21/26 : specially adapted for navigation in a road network
• CPC Class Codes: G01C 21/36 : Input/output arrangements for on-board computers
• CPC Class Codes: G01C 21/365 : Guidance using head up displays or projectors, e.g. virtual vehicles or arrows projected on the windscreen or on the road itself
• CPC Class Codes: G01S 13/862 : Combination of radar systems with sonar systems
• CPC Class Codes: G01S 13/865 : Combination of radar systems with lidar systems
• CPC Class Codes: G01S 13/867 : Combination of radar systems with cameras
• CPC Class Codes: G06T 2207/30252 : Vehicle exterior; Vicinity of vehicle
• CPC Class Codes: G06T 5/80 : Geometric correction
• CPC Class Codes: G06V 20/58 : Recognition of moving objects or obstacles, e.g. vehicles or pedestrians; Recognition of traffic objects, e.g. traffic signs, traffic lights or roads
• CPC Class Codes: H04N 23/90 : Arrangement of cameras or camera modules, e.g. multiple cameras in TV studios or sports stadiums
• CPC Class Codes: H04N 5/265 : Mixing
• CPC Class Codes: H04N 7/181 : for receiving images from a plurality of remote sources
• CPC Class Codes: H04N 7/183 : for receiving images from a single remote source

Abstract

A video mirror system for a vehicle includes an interior rearview mirror assembly having an electrochromic reflective element and a video display screen disposed to the rear of the reflective element. The video display screen, when actuated, emits light that passes through a transflective mirror reflector of the reflective element to be visible to a driver of the vehicle viewing the reflective element. The video display screen includes a thin film transistor liquid crystal display element that is back lit by a plurality of white light emitting light emitting diodes. A camera having a field of view rearward of the vehicle is mounted at the rear of the vehicle and, during a reversing maneuver of the vehicle, a video output of the camera is displayed by the video display screen as video images so as to assist the driver in reversing the equipped vehicle.

Claims

1. A video mirror system for a vehicle, said video mirror system comprising:

an interior rearview mirror assembly attached at an interior portion of a vehicle equipped with said video mirror system, said interior rearview mirror assembly comprising an electrochromic reflective element;

wherein said electrochromic reflective element comprises a front substrate and a rear substrate with an electrochromic medium sandwiched therebetween;

wherein a first surface of said front substrate faces generally towards a driver of the equipped vehicle when said interior rearview mirror assembly is attached at the interior portion of the equipped vehicle, and wherein a second surface of said front substrate is opposite said first surface of said front substrate and has a transparent conductive coating established thereat;

wherein a third surface of said rear substrate has a transflective mirror reflector established thereat and wherein a fourth surface of said rear substrate is opposite said third surface of said rear substrate;

wherein said electrochromic medium contacts said transparent conductive coating at said second surface of said front substrate and said transflective mirror reflector at said third surface of said rear substrate;

a video display screen disposed to the rear of said fourth surface of said rear substrate of said reflective element, wherein said video display screen, when actuated, emits light that passes through said transflective mirror reflector of said reflective element to be visible to a driver of the equipped vehicle viewing said first surface of said front substrate of said reflective element;

wherein said video display screen comprises a thin film transistor liquid crystal display element;

wherein said liquid crystal display element is back lit by a plurality of white light emitting light emitting diodes;

wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually deliver a luminous efficiency of at least about 1 lumen per watt;

wherein the presence of said video display screen is only principally visible to the driver of the equipped vehicle, who is viewing said interior rearview mirror assembly when it is attached at the interior portion of the equipped vehicle, when said liquid crystal display element is back lit;

wherein said reflective element is at least about 15 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed;

wherein a camera having a field of view rearward of the equipped vehicle is mounted at the rear of the equipped vehicle and wherein, during a reversing maneuver of the equipped vehicle, a video output of said camera is displayed by said video display screen as video images so as to assist the driver in reversing the equipped vehicle; and

wherein said video display screen is operable to display at least one of (i) an instruction, (ii) an icon, (iii) a character, (iv) a symbol and (v) indicia.

2. The video mirror system of claim 1, wherein said reflective element is at least about 20 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

3. The video mirror system of claim 1, wherein said reflective element is at least about 25 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

4. The video mirror system of claim 1, wherein said reflective element is at least about 60 percent reflective of visible light incident at said first surface of said front substrate of said reflective element.

5. The video mirror system of claim 1, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually deliver a luminous efficiency of at least about 3 lumens per watt.

6. The video mirror system of claim 1, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually deliver a luminous efficiency of at least about 7 lumens per watt.

7. The video mirror system of claim 1, wherein said plurality white light emitting light emitting diodes comprises at least four white light emitting light emitting diodes, and wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 1 lumen per watt.

8. The video mirror system of claim 7, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 3 lumens per watt.

9. The video mirror system of claim 7, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 5 lumens per watt.

10. The video mirror system of claim 7, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 7 lumens per watt.

11. The video mirror system of claim 7, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 15 lumens per watt.

12. The video mirror system of claim 7, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 20 lumens per watt.

13. The video mirror system of claim 1, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually pass at least about 100 milliamps forward current.

14. The video mirror system of claim 1, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually pass a forward current in the range of about 20 milliamps to about 100 milliamps.

15. The video mirror system of claim 1, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually provide a radiation pattern having a cone of at least about 30 degrees.

16. The video mirror system of claim 15, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually provide a radiation pattern having a cone of up to about 160 degrees.

17. The video mirror system of claim 1, wherein said interior rearview mirror assembly comprises a circuit board.

18. The video mirror system of claim 17, wherein electronic components of said circuit board are commonly utilized to control (i) electrochromic activity of said electrochromic reflective element and (ii) said video display screen.

19. The video mirror system of claim 18, wherein said circuit board supports light emitting diodes.

20. The video mirror system of claim 1, wherein at least one of said front substrate and said rear substrate has a thickness of about 1.6 mm or less.

21. The video mirror system of claim 1, comprising a control operable to control at least one accessory of the equipped vehicle in accordance with a characteristic of an occupant of the equipped vehicle.

22. The video mirror system of claim 21, wherein said at least one accessory comprises a seat adjustment system operable to adjust a seat of the equipped vehicle in accordance with a biometric characteristic of an occupant of the equipped vehicle.

23. The video mirror system of claim 22, wherein said seat adjustment system is operable to adjust a seat of the equipped vehicle in response to biometric data, said biometric data pertaining to the occupant of the seat of the equipped vehicle.

24. The video mirror system of claim 23, wherein the occupant of the equipped vehicle is the driver of the equipped vehicle and wherein said at least one accessory comprises a mirror adjustment system that is operable to at least one of (a) adjust a setting of said interior rearview mirror assembly of the equipped vehicle responsive at least in part to said biometric data and (b) adjust a setting of an exterior rearview mirror assembly of the equipped vehicle responsive at least in part to said biometric data.

25. The video mirror system of claim 1, comprising a control operable to communicate with an external service provider via a wireless communication link between the equipped vehicle and the external service provider.

26. The video mirror system of claim 25, wherein said control receives an input from the driver of the equipped vehicle, and responsive thereto, establishes said wireless communication link between the equipped vehicle and the external service provider, and wherein said control controls at least one accessory of the equipped vehicle responsive to a geographic location of the equipped vehicle as determined by a global positioning system of the equipped vehicle, and wherein data from the external service provider is downloaded to said control via said wireless communication link, and wherein said control comprises memory for storing downloaded data at least after said wireless communication link established between said control and the external service provider is disconnected.

27. The video mirror system of claim 26, wherein said downloaded data comprises downloaded driving instruction data useful for instructing the driver of the equipped vehicle how to drive from an initial location to a destination location, and wherein driving instructions derived at least in part from said downloaded driving instruction data are displayed by said video display screen for viewing by the driver of the equipped vehicle, and wherein said driving instructions are displayed by said video display screen in a step-by-step manner, with at least some driving instruction steps being displayed by said video display screen after said wireless communication link between said control and the external service provider is disconnected.

28. The video mirror system of claim 27, wherein said driving instructions comprise at least two driving instructions with each of said at least two driving instructions being coded or associated with or linked to a respective geographic location, and wherein each driving instruction is displayed by said video display screen only when the then current actual geographic position of the equipped vehicle at least generally corresponds to the particular geographic location coded or associated with or linked to said each driving instruction.

29. The video mirror system of claim 28, wherein said control provides an alert to the driver of the equipped vehicle when the actual geographic position of the equipped vehicle is not where it should be.

30. The video mirror system of claim 1, wherein an overlay indicative of an intended path of rearward travel of the equipped vehicle overlays said video images displayed by said video display screen.

31. The video mirror system of claim 30, wherein said overlay indicates distance.

32. The video mirror system of claim 31, wherein said overlay indicates distance to an object detected by an object detection system of the equipped vehicle.

33. The video mirror system of claim 32, wherein said object detection system comprises an ultrasonic object detection system.

34. A video mirror system for a vehicle, said video mirror system comprising:

an interior rearview mirror assembly attached at an interior portion of a vehicle equipped with said video mirror system, said interior rearview mirror assembly comprising an electrochromic reflective element;

wherein said electrochromic reflective element comprises a front substrate and a rear substrate with an electrochromic medium sandwiched therebetween;

wherein a first surface of said front substrate faces generally towards a driver of the equipped vehicle when said interior rearview mirror assembly is attached at the interior portion of the equipped vehicle, and wherein a second surface of said front substrate is opposite said first surface of said front substrate and has a transparent conductive coating established thereat;

wherein a third surface of said rear substrate has a transflective mirror reflector established thereat and wherein a fourth surface of said rear substrate is opposite said third surface of said rear substrate;

wherein said electrochromic medium contacts said transparent conductive coating at said second surface of said front substrate and said transflective mirror reflector at said third surface of said rear substrate;

a video display screen disposed to the rear of said fourth surface of said rear substrate of said reflective element, wherein said video display screen, when actuated, emits light that passes through said transflective mirror reflector of said reflective element to be visible to a driver of the equipped vehicle viewing said first surface of said front substrate of said reflective element;

wherein said video display screen comprises a thin film transistor liquid crystal display element;

wherein said liquid crystal display element is back lit by a plurality of white light emitting light emitting diodes;

wherein the presence of said video display screen is only principally visible to the driver of the equipped vehicle, who is viewing said interior rearview mirror assembly when it is attached at the interior portion of the equipped vehicle, when said liquid crystal display element is back lit;

wherein said reflective element is at least about 15 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed;

wherein a camera having a field of view rearward of the equipped vehicle is mounted at the rear of the equipped vehicle and wherein, during a reversing maneuver of the equipped vehicle, a video output of said camera is displayed by said video display screen as video images so as to assist the driver in reversing the equipped vehicle;

wherein said video display screen is operable to display at least one of (i) an instruction, (ii) an icon, (iii) a character, (iv) a symbol and (v) indicia;

wherein said interior rearview mirror assembly comprises a circuit board;

wherein electronic components of said circuit board are commonly utilized to control (i) electrochromic activity of said electrochromic reflective element and (ii) said video display screen; and

wherein said circuit board supports light emitting diodes.

35. The video mirror system of claim 34, wherein said reflective element is at least about 20 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

36. The video mirror system of claim 34, wherein said reflective element is at least about 25 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

37. The video mirror system of claim 34, wherein said reflective element is at least about 60 percent reflective of visible light incident at said first surface of said front substrate of said reflective element.

38. The video mirror system of claim 34, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually provide a wide-angle radiation pattern having a cone of at least about 30 degrees.

39. The video mirror system of claim 38, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually provide a wide-angle radiation pattern having a cone of up to about 160 degrees.

40. The video mirror system of claim 34, wherein an overlay indicative of an intended path of rearward travel of the equipped vehicle overlays said video images displayed by said video display screen.

41. The video mirror system of claim 40, wherein at least one of (a) said overlay indicates distance, (b) said overlay indicates distance to an object, (c) said overlay indicates distance to an object detected by an object detection system of the equipped vehicle, and (d) said overlay indicates distance to an object detected by an ultrasonic object detection system of the equipped vehicle.

42. The video mirror system of claim 34, wherein said plurality white light emitting light emitting diodes comprises at least four white light emitting light emitting diodes, and wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 3 lumens per watt.

43. The video mirror system of claim 42, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 7 lumens per watt.

44. The video mirror system of claim 42, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 20 lumens per watt.

45. The video mirror system of claim 34, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually pass a forward current in the range of about 20 milliamps to about 100 milliamps.

46. A video mirror system for a vehicle, said video mirror system comprising:

an interior rearview mirror assembly attached at an interior portion of a vehicle equipped with said video minor system, said interior rearview mirror assembly comprising an electrochromic reflective element;

wherein said electrochromic reflective element comprises a front substrate and a rear substrate with an electrochromic medium sandwiched therebetween;

wherein a first surface of said front substrate faces generally towards a driver of the equipped vehicle when said interior rearview mirror assembly is attached at the interior portion of the equipped vehicle, and wherein a second surface of said front substrate is opposite said first surface of said front substrate and has a transparent conductive coating established thereat;

wherein a third surface of said rear substrate has a transflective mirror reflector established thereat and wherein a fourth surface of said rear substrate is opposite said third surface of said rear substrate;

wherein said electrochromic medium contacts said transparent conductive coating at said second surface of said front substrate and said transflective mirror reflector at said third surface of said rear substrate;

a video display screen disposed to the rear of said fourth surface of said rear substrate of said reflective element, wherein said video display screen, when actuated, emits light that passes through said transflective mirror reflector of said reflective element to be visible to a driver of the equipped vehicle viewing said first surface of said front substrate of said reflective element;

wherein said video display screen comprises a thin film transistor liquid crystal display element;

wherein said liquid crystal display element is back lit by a plurality of white light emitting light emitting diodes;

wherein the presence of said video display screen is only principally visible to the driver of the equipped vehicle, who is viewing said interior rearview mirror assembly when it is attached at the interior portion of the equipped vehicle, when said liquid crystal display element is back lit;

wherein said reflective element is at least about 15 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed;

wherein a camera having a field of view rearward of the equipped vehicle is mounted at the rear of the equipped vehicle and wherein, during a reversing maneuver of the equipped vehicle, a video output of said camera is displayed by said video display screen as video images so as to assist the driver in reversing the equipped vehicle; and

wherein an overlay indicative of an intended path of rearward travel of the equipped vehicle overlays said video images displayed by said video display screen.

47. The video mirror system of claim 46, wherein said overlay at least one of (a) indicates distance, (b) indicates distance to an object, (c) indicates distance to an object detected by an object detection system of the equipped vehicle, and (d) indicates distance to an object detected by an ultrasonic object detection system of the equipped vehicle.

48. The video mirror system of claim 46, wherein said reflective element is at least about 20 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

49. The video mirror system of claim 48, wherein said reflective element is at least about 60 percent reflective of visible light incident at said first surface of said front substrate of said reflective element.

50. The video mirror system of claim 46, wherein said reflective element is at least about 25 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

51. The video mirror system of claim 46, wherein said plurality white light emitting light emitting diodes comprises at least four white light emitting light emitting diodes, and wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 3 lumens per watt.

52. The video mirror system of claim 51, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 5 lumens per watt.

53. The video mirror system of claim 51, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 15 lumens per watt.

54. The video mirror system of claim 46, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually pass a forward current in the range of about 20 milliamps to about 100 milliamps.

55. The video mirror system of claim 46, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually pass at least about 100 milliamps forward current.

56. A video mirror system for a vehicle, said video mirror system comprising:

an interior rearview mirror assembly attached at an interior portion of a vehicle equipped with said video mirror system, said interior rearview mirror assembly comprising an electrochromic reflective element;

wherein said electrochromic reflective element comprises a front substrate and a rear substrate with an electrochromic medium sandwiched therebetween;

wherein a first surface of said front substrate faces generally towards a driver of the equipped vehicle when said interior rearview mirror assembly is attached at the interior portion of the equipped vehicle, and wherein a second surface of said front substrate is opposite said first surface of said front substrate and has a transparent conductive coating established thereat;

wherein a third surface of said rear substrate has a transflective mirror reflector established thereat and wherein a fourth surface of said rear substrate is opposite said third surface of said rear substrate;

wherein said electrochromic medium contacts said transparent conductive coating at said second surface of said front substrate and said transflective mirror reflector at said third surface of said rear substrate;

a video display screen disposed to the rear of said fourth surface of said rear substrate of said reflective element, wherein said video display screen, when actuated, emits light that passes through said transflective mirror reflector of said reflective element to be visible to a driver of the equipped vehicle viewing said first surface of said front substrate of said reflective element;

wherein said video display screen comprises a thin film transistor liquid crystal display element;

wherein said liquid crystal display element is back lit by a plurality of white light emitting light emitting diodes;

wherein said plurality white light emitting light emitting diodes comprises at least four white light emitting light emitting diodes, and wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 3 lumens per watt;

wherein the presence of said video display screen is only principally visible to the driver of the equipped vehicle, who is viewing said interior rearview mirror assembly when it is attached at the interior portion of the equipped vehicle, when said liquid crystal display element is back lit;

wherein said reflective element is at least about 20 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed;

wherein a camera having a field of view rearward of the equipped vehicle is mounted at the rear of the equipped vehicle and wherein, during a reversing maneuver of the equipped vehicle, a video output of said camera is displayed by said video display screen as video images so as to assist the driver in reversing the equipped vehicle; and

wherein an overlay indicative of an intended path of rearward travel of the equipped vehicle overlays said video images displayed by said video display screen.

57. The video mirror system of claim 56, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 7 lumens per watt.

58. The video mirror system of claim 56, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 15 lumens per watt.

59. The video mirror system of claim 56, wherein said overlay at least one of (a) indicates distance, (b) indicates distance to an object, (c) indicates distance to an object detected by an object detection system of the equipped vehicle, and (d) indicates distance to an object detected by an ultrasonic object detection system of the equipped vehicle.

60. The video mirror system of claim 56, wherein said reflective element is at least about 60 percent reflective of visible light incident at said first surface of said front substrate of said reflective element.

61. The video mirror system of claim 56, wherein said reflective element is at least about 25 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

62. The video minor system of claim 56, wherein at least some of said plurality of white light emitting light emitting diodes are operable to each individually pass a forward current in the range of about 20 milliamps to about 100 milliamps.

63. A video mirror system for a vehicle, said video mirror system comprising:

an interior rearview mirror assembly attached at an interior portion of a vehicle equipped with said video mirror system, said interior rearview mirror assembly comprising an electrochromic reflective element;

wherein said electrochromic reflective element comprises a front substrate and a rear substrate with an electrochromic medium sandwiched therebetween;

wherein a first surface of said front substrate faces generally towards a driver of the equipped vehicle when said interior rearview mirror assembly is attached at the interior portion of the equipped vehicle, and wherein a second surface of said front substrate is opposite said first surface of said front substrate and has a transparent conductive coating established thereat;

wherein a third surface of said rear substrate has a transflective mirror reflector established thereat and wherein a fourth surface of said rear substrate is opposite said third surface of said rear substrate;

wherein said electrochromic medium contacts said transparent conductive coating at said second surface of said front substrate and said transflective mirror reflector at said third surface of said rear substrate;

a video display screen disposed to the rear of said fourth surface of said rear substrate of said reflective element, wherein said video display screen, when actuated, emits light that passes through said transflective mirror reflector of said reflective element to be visible to a driver of the equipped vehicle viewing said first surface of said front substrate of said reflective element;

wherein said video display screen comprises a thin film transistor liquid crystal display element;

wherein said liquid crystal display element is back lit by a plurality of white light emitting light emitting diodes;

wherein said plurality white light emitting light emitting diodes comprises at least four white light emitting light emitting diodes, and wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 3 lumens per watt;

wherein each of said at least four white light emitting light emitting diodes is operable to individually pass a forward current of at least about 20 milliamps;

wherein the presence of said video display screen is only principally visible to the driver of the equipped vehicle, who is viewing said interior rearview mirror assembly when it is attached at the interior portion of the equipped vehicle, when said liquid crystal display element is back lit;

wherein said reflective element is at least about 15 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed;

wherein a camera having a field of view rearward of the equipped vehicle is mounted at the rear of the equipped vehicle and wherein, during a reversing maneuver of the equipped vehicle, a video output of said camera is displayed by said video display screen as video images so as to assist the driver in reversing the equipped vehicle; and

wherein said interior rearview mirror assembly comprises a circuit board, and wherein said circuit board supports light emitting diodes.

64. The video mirror system of claim 63, wherein each of said at least four white light emitting light emitting diodes is operable to each individually pass at least about 100 milliamps forward current.

65. The video mirror system of claim 63, wherein each of said at least four white light emitting light emitting diodes is operable to each individually pass a forward current in the range of about 20 milliamps to about 100 milliamps.

66. The video mirror system of claim 63, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 7 lumens per watt.

67. The video mirror system of claim 63, wherein each of said at least four white light emitting light emitting diodes is operable to individually deliver a luminance efficiency of at least about 15 lumens per watt.

68. The video mirror system of claim 63, wherein said reflective element is at least about 20 percent transmitting to visible light incident at said fourth surface of said rear substrate of said reflective element at where said video display screen is disposed.

69. The video mirror system of claim 68, wherein said reflective element is at least about 60 percent reflective of visible light incident at said first surface of said front substrate of said reflective element.

70. The video mirror system of claim 63, wherein electronic components of said circuit board are commonly utilized to control (i) electrochromic activity of said electrochromic reflective element and (ii) said video display screen.

71. The video mirror system of claim 63, wherein said video display screen is operable to display at least one of (i) an instruction, (ii) an icon, (iii) a character, (iv) a symbol and (v) indicia.

72. The video mirror system of claim 63, wherein an overlay indicative of an intended path of rearward travel of the equipped vehicle overlays said video images displayed by said video display screen.

73. The video mirror system of claim 72, wherein said overlay at least one of (a) indicates distance, (b) indicates distance to an object, (c) indicates distance to an object detected by an object detection system of the equipped vehicle, and (d) indicates distance to an object detected by an ultrasonic object detection system of the equipped vehicle.