In-vehicle device remote control system and method

• US 20080001708A1
• Filed: 05/03/2007
• Published: 01/03/2008
• Est. Priority Date: 06/19/2006
• Status: Active Grant

• Current Assignee: DENSO Corporation
• Original Assignee: DENSO Corporation
• Inventors: Nakashima, Kazuhiro, Ogino, Kenichi, Teshima, Kentarou
• Granted Patent: US 7,663,471 B2
• Time in Patent Office: Days
• US Class Current: 340/5.72
• CPC Class Codes: B60Q 1/247 for illuminating the close surroundings of the vehicle, e.g. to facilitate entry or exit for reverse drive B60Q1/22; by opening a side door B60Q1/323
• CPC Class Codes: B60Q 2400/40 Welcome lights, i.e. specific or existing exterior lamps to assist leaving or approaching the vehicle
• CPC Class Codes: B60R 2225/00 Means indicating the functioning state of the alarm system, e.g. indicating arming, using leds
• CPC Class Codes: B60R 25/2009 Antitheft state indicator
• CPC Class Codes: B60R 25/245 where the antenna reception area plays a role
• CPC Class Codes: G07C 2009/00793 by Hertzian waves
• CPC Class Codes: G07C 9/00309 operated with bidirectional data transmission between data carrier and locks

Abstract

In an in-vehicle device remote control system, a vehicle-side device determines in which detection area an electronic key exists based on a response signal transmitted from the key in response to request signals, and a control door to be operated in correspondence to the detection area in which the key exists. The vehicle-side device notifies a user that the key is an authorized one by light, sound, display or the like on the determined control door. With this operation, it is readily recognized by the user because the user is approaching the control door.

Claims

1. An in-vehicle device remote control system, comprising:

a plurality of transmitters that are disposed at a plurality of given positions of a vehicle and transmit transmission request signals, which form different detection areas outside doors of the vehicle;

a mobile device that transmits a response signal in response to the transmission request signal when entering the detection areas;

a receiver that is disposed in the vehicle and receives the response signal of the mobile device;

determining means that executes a given matching process with respect to the response signal of the mobile device for determining that the mobile device is an authorized mobile device when matching is confirmed;

operation control means that controls an operation state of the in-vehicle device based on a determination of the determining means that the mobile device is the authorized mobile device;

control door determining means that determines a detection area in which the mobile device exists based on the response signal of the mobile device and the transmission request signals of the transmitters and sets a door corresponding to the determined detection area as a control door;

a memory device that stores a notifying operation with respect to each control door; and

notifying means that executes the notifying operation of the control door determined based on storage contents of the memory device.

2. The in-vehicle device remote control system as in claim 1, wherein:

at least a part of the transmitters transmit the transmission request signal in a given period when the vehicle is parked and the doors are locked;

the operation control means executes unlocking of the doors of the vehicle in response to the response signal of the mobile device, which is the authorized mobile device.

3. The in-vehicle device remote control system as in claim 1, further comprising:

environment determining means that determines an environment around the vehicle,

wherein the memory device stores a plurality of notifying operations different from each other in correspondence to different determined environments with respect to each control door, respectively, and

wherein the notifying means executes the notifying operation stored in the memory device in relation to the control door and the determined environment.

4. The in-vehicle device remote control system as in claim 3, wherein:

the memory device stores a notifying operation by light as one of the notifying operations;

the environment determining means includes brightness determining means for determining brightness around the vehicle; and

the notifying means executes the notifying operation using the light when the brightness around the vehicle is determined to be dark.

5. The in-vehicle device remote control system as in claim 3, wherein:

the memory device stores a notifying operation by sound as one of the notifying operations;

the environment determining means includes noise determining means for determining noise level around the vehicle; and

the notifying means executes the notifying operation using the sound when the noise level around the vehicle is small.

6. The in-vehicle device remote control system as in claim 1, wherein:

the memory device is capable of being changed with respect to the notifying operations from an external side.

7. An in-vehicle device remote control method for a vehicle comprising:

transmitting a plurality of response request signals from the vehicle in different directions in surrounding areas of the vehicle so that a response signal is received from a mobile device in response to any one of the response request signals;

receiving the response signal from the mobile device;

determining a location of the mobile device based on a relation between transmitted response request signals and a received response signal;

notifying a reception of the response signal to an outside of the vehicle by a device provided near a door which is closest to a determined location of the mobile device.

8. The in-vehicle device remote control method for a vehicle as in claim 7, further comprising:

detecting an environment condition of the vehicle; and

changing a mode of a notification in correspondence to a detected environment condition.

9. The in-vehicle device remote control method for a vehicle as in claim 8, wherein:

the mode of a notification is selected from a plurality of modes of notification stored in a memory as a function of a plurality of environment conditions of the vehicle.

10. An in-vehicle device remote control method for a vehicle comprising:

transmitting a plurality of response request signals from the vehicle in different directions in surrounding areas of the vehicle so that a response signal is received from a mobile device in response to any one of the response request signals;

receiving the response signal from the mobile device;

determining an environment condition of the vehicle; and

notifying a reception of the response signal to an outside of the vehicle by light or sound in a mode variable with a determined environment condition of the vehicle.