Device for checking lateral views at front/rear ends of vehicle

• US 5,756,988 A
• Filed: 06/26/1996
• Issued: 05/26/1998
• Est. Priority Date: 06/27/1995
• Status: Expired due to Fees

• Current Assignee: Yoshihisa Furuta
• Original Assignee: Yoshihisa Furuta
• Inventors: Furuta, Yoshihisa
• Primary Examiner(s): LE, QUE TAN
• Application Number:
  US08/670,443
• Time in Patent Office: 699 Days
• Field of Search: 250/216, 250/208.1, 250/203.6, 250/239, 359/726-731, 359/737-738, 340/937-939, 340/990, 340/995, 340/996, 364/423.098, 364/424.018, 364/424.019, 348/116-120, 348/153-156
• US Class Current: 250/208.1
• CPC Class Codes: B60Q 1/52 for indicating emergencies
• CPC Class Codes: B60Q 9/005 using a video camera
• 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 1/23 with a predetermined field of view
• CPC Class Codes: B60R 2300/10 characterised by the type of camera system used
• CPC Class Codes: B60R 2300/303 using joined images, e.g. multiple camera images
• CPC Class Codes: B60R 2300/802 for monitoring and displaying vehicle exterior blind spot views
• CPC Class Codes: B60R 2300/8066 for monitoring rearward traffic

Abstract

A device for checking lateral views at front/rear ends of a vehicle comprises an image pickup unit having a light path altering assembly and an image sensor and disposed at a front or rear end of a vehicle, for taking into the image sensor image information of areas on the right and left of the vehicle by way of the light path altering assembly and image information of an area ahead of the image sensor through a gap formed along an extension of an axial line of the image sensor; and a display unit provided in a room of the vehicle, for displaying the image information taken into the image sensor.

Claims

1. A device for checking lateral views at front/rear ends of a vehicle comprising:

image pickup means having a light path altering assembly and an image sensor and disposed at a front or rear end of a vehicle, the light path altering assembly constructed and arranged for the image sensor to receive image information of areas on the right and left of the vehicle by way of the light path altering assembly and to receive directly image information of an area ahead of the image sensor through a gap in the light path altering assembly formed along an extension of an axial line of the image sensor; and

display means provided in a room of the vehicle for displaying the image information taken into the image sensor.

2. The device as set forth in claim 1, wherein the image pickup means further comprises filter means disposed on a line connecting the image sensor and the gap or an extension thereof, for reducing the quantity of light of the image information taken into the image sensor through the gap to substantially the same quantity of light of the image information taken into the image sensor by way of the light path altering means.

3. The device as set forth in claim 1, wherein the image sensor comprises a charge coupled device.

4. The device as set forth in claim 1, wherein the light path altering means comprises mirror means which is disposed on both sides of a vertical plane containing an axial line of the image sensor with an angle of about 135 degrees relative to the vertical plane so as to lead the image information of areas on the right and left of the vehicle to the image sensor.

5. The device as set forth in claim 4, wherein the image pickup means further comprises filter means disposed on a line connecting the image sensor and the gap or an extension thereof, for reducing the quantity of light of the image information taken into the image sensor through the gap to substantially the same quantity of light of the image information taken into the image sensor by way of the light path altering means.

6. The device as set forth in claim 4, wherein the image sensor comprises a charge coupled device.

7. The device as set forth in claim 1, wherein the light path altering means comprises:

first mirror means disposed on both sides of a vertical plane containing an axial line of the image sensor with a predetermined angle relative to the vertical plane; and

second mirror means disposed in front of the image sensor with a reflective surface thereof being faced with the image sensor,

whereby the image information of areas on the right and left of the vehicle is lead to the image sensor by being reflected at the first mirror means and then at the second mirror means.

8. The device as set forth in claim 7, wherein the first mirror means is disposed on both sides of the vertical plane with an angle of between 115 and 135 degrees relative to the vertical plane.

9. The device as set forth in claim 7, wherein the image sensor comprises a charge coupled device.

10. The device as set forth in claim 7, wherein the image pickup means further comprises filter means disposed on a line connecting the image sensor and the gap or an extension thereof, for reducing the quantity of light of the image information taken into the image sensor through the gap to substantially the same quantity of light of the image information taken into the image sensor by way of the light path altering means.

11. The device as set forth in claim 10, wherein the image sensor comprises a charge coupled device.

12. The device as set forth in claim 1, wherein the light path altering means comprises:

first mirror means disposed on both sides of a vertical plane containing an axial line of the image sensor with a predetermined angle relative to the vertical plane; and

second mirror means disposed in front of the image sensor with a reflective surface thereof being faced with the image sensor,

whereby the image information of areas on the right and left of the vehicle is lead to the image sensor after being reflected at the first mirror means and then at the second mirror means, and wherein

the second mirror means is disposed to be inclined with a predetermined angle relative to a plane perpendicular to the axial line of the image sensor,

whereby image information of an area backward of the image sensor is taken into the image sensor after being reflected at the second mirror means.

13. The device as set forth in claim 12, wherein the image pickup means further comprises filter means disposed on a line connecting the image sensor and the gap or an extension thereof, for reducing the quantity of light of the image information taken into the image sensor through the gap to substantially the same quantity of light of the image information taken into the image sensor by way of the light path altering means.

14. The device as set forth in claim 12, wherein the image sensor comprises a charge coupled device.