Motor vehicle lighting system

• US 6,714,128 B2
• Filed: 03/18/2002
• Issued: 03/30/2004
• Est. Priority Date: 05/17/2001
• Status: Expired due to Term

• Current Assignee: DFR Acquisition Corporation
• Original Assignee: David C. Abbe, Thomas H. Rudd
• Inventors: Rudd, Thomas H., Abbe, David C.
• Primary Examiner(s): GOINS, DAVETTA WOODS
• Application Number:
  US10/100,289
• Publication Number:
  US 20020171543A1
• Time in Patent Office: 743 Days
• Field of Search: 340/468, 340/479, 340/541, 340/465, 340/464, 340/471, 362/541, 362/800, 362/499, 174/70.B, 174/68.1, 174/149.R, 174/99.B, 710/106, 710/107, 710/108, 710/109, 710/110, 710/112, 361/675, 361/42, 361/43, 361/44, 326/86
• US Class Current: 340/468
• CPC Class Codes: B60Q 1/381 with several light sources activated in sequence, e.g. to create a sweep effect
• CPC Class Codes: B60Q 1/44 for indicating braking action or preparation for braking, e.g. by detection of the foot approaching the brake pedal
• CPC Class Codes: B60Q 1/46 for giving flashing caution signals during drive, other than signalling change of direction, e.g. flashing the headlights or hazard lights
• CPC Class Codes: B62J 6/056 characterised by control means

Abstract

A motor vehicle lighting system includes a master controller, a smart light, and a hot bus. The master controller is electrically couplable to a power supply and is adapted to receive an input signal corresponding to a left turn signal, a right turn signal, a run signal, or a brake signal. The master controller also includes a digital command signal output that is produced in response to the input signal. The smart light includes a light controller and a plurality of light emitting diodes (LED'"'"'s). The light controller is adapted to control the LED'"'"'s in response to the command signal. The hot bus electrically couples the master controller to the smart light. Power and the command signal are provided to the smart light over the hot bus.

Claims

1. A motor vehicle lighting system comprising:

a master controller electrically couplable to a power supply and adapted to receive an input signal corresponding to at least one of a left turn signal, a right turn signal, a run signal, or a brake signal, the master controller having a digital command signal output that is produced in response to the input signal;

a smart light having a light controller and a plurality of light emitting diodes (LED'"'"'s), the light controller adapted to control the LED'"'"'s in response to the command signal; and

a hot bus electrically coupling the master controller to the smart light, wherein power and the command signal are provided to the smart light over the hot bus.

2. The system of claim 1, including a light socket electrically coupled to the hot bus, wherein the smart light electrically couples to the hot bus through the socket.

3. The system of claim 1, wherein:

the light controller includes a microprocessor and a memory;

the command signal identifies instructions stored in the memory; and

the microprocessor controls the LED'"'"'s in accordance with the instructions.

4. The system of claim 1, wherein the smart light is a left tail light, a right tail light, a center tail light, a front left turn light, or a front right turn light.

5. The system of claim 1, wherein:

the LED'"'"'s are of at least two different colors; and

the light controller provides separate control of the different colored LED'"'"'s.

6. The system of claim 1, wherein the smart light includes a housing surrounding a circuit board, which contains the light controller and the LED'"'"'s.

7. The system of claim 1, wherein the light controller provides two different states of energization of the LED'"'"'s.

8. The system of claim 1, wherein the smart light is a center tail light and includes a circuit board containing the plurality of LED'"'"'s, the plurality of LED'"'"'s being of red and amber colors, the amber LED'"'"'s mounted on right and left side portions of the circuit board, the light controller energizing the red LED'"'"'s at a low level for run lights and a high-level for brake lights.

9. The system of claim 8, wherein the red LED'"'"'s are separated into three groups on the circuit board:

one positioned on a center portion, one positioned on the right side portion, and one positioned on the left side portion;

each group of red LED'"'"'s being individually controllable by the light controller, the group of red LED'"'"'s on the right side portion being off when the amber LED'"'"'s on the right side portion of the circuit board are energized, and the group of red LED'"'"'s on the left side portion of the circuit board being off when the amber LED'"'"'s on the left side portion of the circuit board are energized.

10. The system of claim 1, wherein the master controller includes a bypass connection that is couplable to the input signal, whereby the input signal can bypass the master controller when enabled.

11. The system of claim 1, wherein the digital command signal comprises voltage pulses over the hot bus.

12. The system of claim 1, including at least one additional smart light coupled to the hot bus.

13. The system of claim 1, wherein the master controller includes at least one additional digital command signal output for controlling another smart light.

14. The system of claim 1, wherein the master controller is adapted to receive at least one additional input signal.

15. A method of controlling a lighting system of a motor vehicle comprising steps of:

a) receiving an input signal corresponding to at least one of a left turn signal, a right turn signal, a run signal, or a brake signal;

b) producing a digital command signal in response to the input signal;

c) providing power and the command signal to a smart light over a hot bus, the smart light having a plurality of light emitting diodes (LED'"'"'s) and a light controller; and

d) controlling the LED'"'"'s in response to the command signal using the light controller.

16. The method of claim 15, wherein the producing step b) includes producing voltage pulses over the hot bus representing bits of data.

17. The method of claim 15, wherein the controlling step d) includes switching power to the LED'"'"'s.

18. The method of claim 15, wherein:

the light controller includes a microprocessor and a memory; and

the controlling step d) includes retrieving instructions from the memory corresponding to the command signal with the microprocessor and controlling the LED'"'"'s in accordance with the instructions.