Vehicular distance measuring system with integral mirror display

• US 5,303,205 A
• Filed: 07/02/1992
• Issued: 04/12/1994
• Est. Priority Date: 02/26/1990
• Status: Expired due to Fees

• Current Assignee: Trend Tec, Inc.
• Original Assignee: Trend Tec, Inc.
• Inventors: Wayne, Thomas R., Gauthier, Dale R.
• Primary Examiner(s): Pihulic, Daniel T.
• Application Number:
  US07/908,267
• Time in Patent Office: 649 Days
• Field of Search: 367/108, 367/99, 367/107, 367/909, 367/188, 340/435, 340/436, 219/219
• US Class Current: 367/108
• CPC Class Codes: B60Q 1/0023 the element being a sensor, e.g. distance sensor, camera
• CPC Class Codes: B60Q 9/005 using a video camera
• CPC Class Codes: B60Q 9/007 providing information about the distance to an obstacle, e.g. varying sound
• CPC Class Codes: B60R 2300/101 using cameras with adjustable capturing direction
• CPC Class Codes: B60R 2300/103 using camera systems provided with artificial illumination device, e.g. IR light source
• CPC Class Codes: B60R 2300/105 using multiple cameras
• CPC Class Codes: B60R 2300/106 using night vision 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 2300/303 using joined images, e.g. multiple camera images
• CPC Class Codes: B60R 2300/8026 in addition to a rear-view mirror system
• CPC Class Codes: B60R 2300/8053 for bad weather conditions or night vision
• CPC Class Codes: G01S 15/86 Combinations of sonar systems with lidar systems; Combinations of sonar systems with systems not using wave reflection
• CPC Class Codes: G01S 15/931 of land vehicles
• CPC Class Codes: G01S 2015/938 in the bumper area
• CPC Class Codes: G01S 3/7864 T.V. type tracking systems
• CPC Class Codes: G01S 7/52004 Means for monitoring or calibrating short-range imaging G01S7/5205
• CPC Class Codes: G01S 7/521 Constructional features
• CPC Class Codes: G01S 7/64 Luminous indications G01S7/62 takes precedence ; short-range imaging G01S7/52076
• CPC Class Codes: Y10S 367/909 Collision avoidance

Abstract

A vehicular distance measuring system includes a distance measuring device for detecting a distance to an object and, in response, supplying a distance signal. An ultrasonic transducer mounted in a vehicle taillight or running light assembly is used to ultrasonically detect and range objects in back of, and along side a vehicle in which the system is installed. A display includes (i) a vehicular mirror having an image reflecting surface with a transparent window portion located therein, and (ii) a digital display mounted on the vehicular mirror and viewable through the window portion. The digital display is responsive to the distance signal for displaying the detected distance to the object. The distance measuring device includes a comparator for comparing the distance to the object with a predetermined threshold distance and, in response, supplying a display unblank signal. The digital display is responsive to the display unblank signal for selectively blanking the digital display and displaying the detected distance to the object. The display includes an illumination device such as light emitting diodes (LEDs) responsive to the display unblank signal for illuminating the digital display.

Claims

1. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal; and

a display structure including

(i) a vehicular mirror having an image reflecting surface with a window portion located therein, and

(ii) a digital display mounted on said vehicular mirror and viewable through said window portion, said digital display being activated in continuous response to said distance signal for displaying the detected distance to the object.

6. The vehicular distance measuring system according to claim 1, wherein said distance measuring device includes:

an ultrasonic transceiver responsive to a transmit signal for emitting an ultrasonic wave and for receiving a reflected ultrasonic wave and, in response, supplying a received signal;

timing circuitry for measuring a time period between the emission of the ultrasonic wave by said ultrasonic transmitter and reception of said reflected ultrasonic wave by said ultrasonic transceiver; and

distance conversion circuitry responsive to said measured time period for supplying said distance signal.

8. The vehicular distance measuring system according to claim 1, where said digital display is electronic and includes a binary-coded-decimal (BCD) decoder receiving said distance signal and, in response, supplying a display driver signal, said electronic digital display responsive to said display driver signal for displaying said detected distance to the object.

9. The vehicular distance measuring system according to claim 8, wherein said electronic digital display comprises a pair of liquid crystal displays (LCDs).

10. The vehicular distance measuring system according to claim 8, wherein said electronic digital display comprises a pair of light emitting diode displays (LEDs.)

11. The vehicular distance measuring system according to claim 1, wherein said display includes mounting means attaching said display to an outer portion of a vehicle.

12. The vehicular distance measuring system according to claim 1, further comprising heater means for electrically heating said vehicular mirror.

13. The vehicular distance measuring system according to claim 1, wherein said window comprises a pellicular mirror.

14. The vehicular distance measuring system according to claim 1, wherein said window is transparent.

2. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal; and

a display structure including

(i) a vehicular mirror having an image reflecting surface with a window portion located therein, and

(ii) a digital display mounted on said vehicular mirror and viewable through said window portion, said digital display being activated in continuous response to said distance signal for displaying the detected distance to the object; and

,

a combination vehicular light and sensor housing including

(i) a shell,

(ii) a light emitter mounted in said shell for supplying visible light,

a transducer mounted in said shell for emitting and receiving a probe signal for measuring said distance to said object, and

(iv) a lens mounted to said shell for transmitting said visible light.

3. The vehicular distance measuring system according to claim 2 wherein said lens includes an aperture aligned with said transducer.

4. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal; and

a display structure including

(i) a vehicular mirror having an image reflecting surface with a window portion located therein, and

(ii) a digital display mounted on said vehicular mirror and viewable through said window portion, said digital display being activated in continuous response to said distance signal for displaying the detected distance to the object; and

,

means for comparing the distance to the object with a predetermined threshold distance and, in response, supplying a display unblank signal, said digital display responsive to said display unblank signal for selectively (i) blanking the digital display and (ii) displaying the detected distance to the object.

5. The vehicular distance measuring system according to claim 4, said display further comprising an illumination source responsive to said display unblank signal for illuminating said digital display.

7. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal; and

a display structure including

(i) a vehicular mirror having an image reflecting surface with a window portion located therein, and

(ii) a digital display mounted on said vehicular mirror and viewable through said window portion, said digital display being activated in continuous response to said distance signal for displaying the detected distance to the object;

an ultrasonic transceiver responsive to a transmit signal for emitting an ultrasonic wave and for receiving a reflected ultrasonic wave and, in response, supplying a received signal;

timing circuitry for measuring a time period between the emission of the ultrasonic wave by said ultrasonic transmitter and reception of said reflected ultrasonic wave by said ultrasonic transceiver;

distance conversion circuitry responsive to said measured time period for supplying said distance signal; and

,

a combination vehicular light and sensor housing including

(i) a shell,

(ii) light emitting source mounted in said shell for supplying visible light,

(iii) means for mounting said ultrasonic transceiver in said shell, and

(iv) a lens mounted to said shell for transmitting said visible light.

15. A vehicular distance measuring system, comprising:

a distance measuring device including

(i) a first sensor channel for detecting a distance to an object located in a first space and, in response, supplying a first sensor signal, and

(ii) a processor responsive to said first sensor channel for supplying a first distance signal; and

a distance display system including

(i) a vehicular side view mirror mounted on the exterior of this vehicle having an image reflecting surface and a first window located in a portion of said image reflecting surface, and

(ii) a first digital display mounted on said vehicular side view mirror, said numeric display visible through said first transparent window and activated in continuous response to said first distance signal for displaying the detected distance to the object.

24. The vehicular distance measuring system according to claim 15, wherein said first window comprises a pellicular mirror.

25. The vehicular distance measuring system according to claim 15, wherein said first window is transparent.

16. A vehicular distance measuring system, comprising:

a distance measuring device including

(i) a first sensor channel for detecting a distance to an object located in a first space and, in response, supplying a first sensor signal, and

(ii) a processor responsive to said first sensor channel for supplying a first distance signal; and

a distance display system including

(i) a vehicular side view mirror mounted on the exterior of this vehicle having an image reflecting surface and a first window located in a portion of said image reflecting surface, and

(ii) a first digital display mounted on said vehicular side view mirror, said numeric display visible through said first transparent window and activated in continuous response to said first distance signal for displaying the detected distance to the object;

wherein said processor supplies an unblank display signal to said numeric display in response to detecting the object within a predetermined distance, said first digital display is responsive to said unblank display signal for selectively blanking and displaying said detected distance.

17. The vehicular distance measuring system according to claim 16, said first digital display comprises an electronic display and a display illumination source responsive to said unblank display signal from said distance measuring means for illuminating said electronic digital display.

18. The vehicular distance measuring system according to claim 17, wherein said first electronic digital display is selectively actuated in response to said unblank display signal with a detected distance greater than said predetermined distance and displays the detected distance less than said predetermined distance.

19. The vehicular distance measuring system according to claim 16, said distance display system further comprising a display illumination source responsive to a signal from said processor for illuminating said electronic digital display.

20. The vehicular distance measuring system according to claim 16,

said distance measuring device including a second sensor channel for detecting a distance to an object located in a second space and, in response, supplying a second sensor signal, said processor responsive to said second sensor channel for supplying a second distance signal;

said vehicular rear view mirror having a second window located in a portion of said image reflecting surface spaced from said first window, and a second digital display mounted on said vehicular rear view mirror, said second digital display being visible through said second transparent window and responsive to said second distance signal for displaying the second detected distance.

21. The vehicular distance measuring system according to claim 20, said distance measuring device including display blanking means for selectively blanking said first and second digital displays in response to no object being detected by said respective first and second sensor channels within predetermined threshold distances.

22. The vehicular distance measuring system according to claim 21, further comprising display illumination means for selectively illuminating said first and second numeric displays in response to said first and second sensor channels respectively detecting an object within said predetermined threshold distances.

23. The vehicular distance measuring system according to claim 16, said first sensor channel comprising:

an ultrasonic transmitter responsive to a transmit signal for emitting an ultrasonic wave;

an ultrasonic receiver for receiving a reflected ultrasonic wave and, in response, supplying a received signal;

timing circuitry for measuring a time period between the emission of the ultrasonic wave by said ultrasonic transmitter and reception of said reflected ultrasonic wave by said ultrasonic receiver; and

distance conversion circuitry responsive to said measured time period for supplying said distance signal.

26. A vehicular distance measuring system mounted in a vehicle for detecting a distance to an object, comprising:

control circuitry for supplying a transmit signal and, responsive to a received echo signal, supplying a distance signal;

ultrasonic transducer means mounted on an exterior surface of said vehicle and responsive to said transmit signal for emitting an ultrasonic wave and for receiving a reflected ultrasonic wave and, in response, supplying said received echo signal;

a side view mirror mounted outside of said vehicle for observing an object at a rear of the vehicle, said side view mirror including a reflective surface; and

an electronic digital display mounted on said side view mirror and observable through a window in said reflective surface, said numeric display responsive to said distance signal for displaying numeric distance data.

27. The vehicular distance measuring system according to claim 26, said control means including display blanking means responsive to said received echo signal for blanking said electronic digital display whereby display of numeric data by said electronic digital display is suppressed responsive to no object being detected within a predetermined threshold distance from the vehicle.

28. A vehicular light and sensor housing assembly, comprising:

a vehicular mountable shell;

light emitting means mounted in said shell for supplying visible light;

a transducer mounted in said shell for emitting and receiving a probe signal for measuring a distance; and

a lens mounted to said shell for transmitting said visible light and said probe signal.

29. The vehicular light and sensor housing assembly according to claim 28 wherein said probe signal comprises ultrasonic wave energy.

30. The vehicular light and sensor housing assembly according to claim 28, further comprising means for sealing said lens to said shell to prevent entry of contaminants into said housing.

31. The vehicular light and sensor housing assembly according to claim 28 wherein said transducer includes means to transmitting and receiving ultrasonic wave energy.

32. The vehicular light and sensor housing assembly according to claim 31 wherein said lens includes an aperture aligned with said transducer.

33. The vehicular light and sensor housing assembly according to claim 31 wherein said lens comprises a plastic cover translucent to said visible light with a window portion substantially transparent to said ultrasonic wave energy.

34. The vehicular light and sensor housing assembly according to claim 28, further including means for mounting said shell to an exterior of a motor vehicle.

35. The vehicular light and sensor housing assembly according to claim 28 wherein said light emitting means comprises and incandescent lamp and means for supplying electric power to said incandescent lamp.

36. A vehicular position monitoring system comprising:

at least one sensor mounted on an exterior of a vehicle and having an output;

a processor arranged to derive information from said output of said at least one sensor indicative of vehicle position;

at least one vehicular mirror having a reflecting surface; and

a display mounted within said mirror to be visible through an aperture in said reflecting surface, said display being activated in continuous response to the output of said sensor.

37. The vehicular position monitoring system of claim 36, further comprising means for maintaining said aperture in a reflective condition when said display is not activated.

38. The vehicular position monitoring system of claim 37, wherein said means for maintaining said aperture in a reflective state comprises a pellicular mirror.

46. The vehicular position monitoring system of claim 36, further comprising at least one additional aperture and one additional display mounted so as to be visible through said aperture in said reflecting surface.

53. The vehicular position monitoring system of claim 36, wherein said display comprises an electronic display.

39. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal; and

a display structure including;

(i) a vehicular mirror having an image reflecting surface with an aperture located therein, and

(ii) an electronic digital display mounted in said vehicular mirror in a position substantially offset from the latitudinal axis of said mirror, said electronic digital display being viewable through said aperture and activated responsive to said distance signal so as to display the detected distance to the object.

40. The vehicular distance measuring system of claim 39, wherein said vehicular mirror is arranged as a rear view mirror within said vehicle.

41. The vehicular distance measuring system of claim 39, wherein said vehicular mirror is arranged as a side view mirror mounted on the exterior of the vehicle.

42. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal, said distance measuring device comprising;

means for comparing the distance to the object with a predetermined threshold distance and, in response, supplying a display unblank signal; and

a display structure including

(i) a vehicular mirror having an image reflecting surface with an aperture located therein, and

(ii) an electronic digital display mounted in said vehicular mirror and viewable through said aperture portion, said electronic digital display being responsive to said distance signal for displaying the detected distance to the object, and being responsive to said display unblank signal for selectively displaying the detected distance to the object.

43. The vehicular distance measuring system of claim 42, wherein said display structure further comprises an illumination source responsive to said display unblank signal for illuminating said electronic digital display.

44. The vehicular distance measuring system of claim 43, wherein said vehicular mirror is arranged as a rear view mirror.

45. The vehicular distance measuring system of claim 43, wherein said vehicular mirror is arranged as a side view mirror mounted to the exterior of said vehicle.

47. A vehicular distance measuring system, comprising:

a distance measuring device arranged to detect a distance to an object and, in response, to output a distance signal; and

a display structure including

(i) a vehicular mirror having an image reflecting surface with an aperture located therein,

(ii) an electronic digital display mounted in said vehicular mirror and viewable through said aperture, said electronic digital display responsive to said distance signal for displaying the detected distance to the object, and

(iii) means for maintaining said aperture in a reflective state when said display is not activated.

48. The vehicular distance measuring system of claim 47, wherein said means for maintaining said aperture in a reflective state comprises a pellicular mirror.

49. The vehicular distance measuring system of claim 47, wherein said vehicular mirror is arranged as a rear view mirror inside of said vehicle.

50. The vehicular distance measuring system of claim 47, wherein said vehicular mirror is arranged as a side view mirror mounted on the exterior of said vehicle.

51. The vehicular distance measuring system of claim 47, wherein said aperture is substantially offset from the latitudinal axis of said vehicular mirror.

52. The vehicular position monitor system of claim 47, wherein all of said apertures are substantially offset from the latitudinal axis of the vehicular mirror.

54. A method of monitoring objects behind a vehicle comprising the steps of:

(a) backing said vehicle;

(b) receiving signals corresponding to objects behind said vehicle responsive to backing said vehicle;

(c) processing said signals into data indicative of said objects; and

(d) displaying said data on a rear view mirror of said vehicle continuously responsive to said signals.