Keyless entry system incorporating concealable keypad

• US 7,911,321 B2
• Filed: 06/18/2009
• Issued: 03/22/2011
• Est. Priority Date: 10/26/2004
• Status: Active Grant

• Current Assignee: ADAC Plastics Incorporated (ADAC Automotive, Inc.)
• Original Assignee: ADAC Plastics Incorporated (ADAC Automotive, Inc.)
• Inventors: Meinke, Joseph, Bingle, Robert L.
• Primary Examiner(s): HOFSASS, JEFFERY A
• Application Number:
  US12/486,827
• Publication Number:
  US 20100219935A1
• Time in Patent Office: 642 Days
• Field of Search: 340/5.54, 340/5.72, 362/501
• US Class Current: 340/5.54
• CPC Class Codes: E05B 17/10 Illuminating devices on or for locks or keys; Transparent or translucent lock parts; Indicator lights
• CPC Class Codes: E05B 81/76 Detection of handle operation; Detection of a user approaching a handle; Electrical switching actions performed by door handles
• CPC Class Codes: G07C 9/0069 actuated in a predetermined sequence
• CPC Class Codes: H03K 17/9622 using a plurality of detectors, e.g. keyboard
• CPC Class Codes: H03K 2217/960785 with illumination

Abstract

A keyless entry system has a handle housing and a grip cover defining a door handle grip, a keyless entry pad defining a plurality of keys, each identified with a corresponding symbol, a plurality of sensors in proximity to the keys for detecting an object in the vicinity of the keys, an illumination source to selectively backlight the sensors and symbols, and a light-controlling membrane extending over the keyless entry pad. Entering a keyless entry code into the keyless entry pad by selecting keys in a predetermined sequence enables a latch to be selectively disposed in either a locked condition or an unlocked condition. In ambient light, the light-controlling membrane renders the symbol invisible. When the illumination source backlights the sensor and the symbol, the light-controlling membrane renders the symbol visible.

Claims

1. A keyless entry system for a door having a latch operable between a locked condition, wherein a door is prevented from opening, and an unlocked condition, wherein a door can be opened, the keyless entry system comprising:

a handle housing pivotally mountable to a door;

a grip cover for complementary engagement with the handle housing to cooperatively define a door handle grip;

a keyless entry pad associated with the grip cover, defining a plurality of keys, each one of the plurality of keys identified with a corresponding symbol to collectively form a textual representation of at least one of a vehicle and a user of a vehicle, the plurality of keys being immovable relative to the grip cover;

a plurality of sensors, each sensor in proximity to at least one of the plurality of keys and corresponding symbol, for detecting an object in the vicinity of at least one of the plurality of keys;

an illumination source adapted for selective illumination to selectively backlight the plurality of sensors and corresponding symbols; and

a light-controlling membrane extending over at least a portion of the keyless entry pad comprising a portion of the first surface;

wherein entering a keyless entry code into the keyless entry pad by selecting keys in a predetermined sequence enables a latch to be selectively disposed in either a locked condition or an unlocked condition; and

wherein in ambient light, the light-controlling membrane renders the at least one symbol invisible, and when the illumination source backlights the at least one sensor and the at least one symbol, the light-controlling membrane renders the at least one symbol visible.

2. The keyless entry system according to claim 1 wherein the keyless entry pad is formed on a door handle mounted to a door.

3. The keyless entry system according to claim 2 wherein a door handle comprises a grip, and the keyless entry pad is formed on the grip.

4. The keyless entry system according to claim 3 wherein the illumination source is mounted behind the keyless entry pad for backlighting the keys.

5. The keyless entry system according to claim 4 wherein the illumination source comprises a plurality of light sources in register with the keys for individually backlighting each key.

6. The keyless entry system according to claim 4 wherein the illumination source backlights the keys in response to at least one of the following:

a user touching at least one of the keys, a user touching the door handle grip, a user actuating a turn signal, a user activating a fob associated with a vehicle, a fob associated with a vehicle being located within a predetermined distance of a vehicle, and a user opening a door from inside a vehicle.

7. The keyless entry system according to claim 4 wherein the illumination source comprises light emitting diodes.

8. The keyless entry system according to claim 1 wherein the illumination source comprises light emitting diodes.

9. The keyless entry system according to claim 1 wherein the sensors comprise field effect sensors.

10. The keyless entry system according to claim 1 wherein the at least one symbol comprises at least one of a make and a model of a vehicle.

11. The keyless entry system according to claim 1 wherein the at least one symbol comprises only letters.

12. The keyless entry system according to claim 1 wherein the at least one symbol comprises a combination of letters and numbers.

13. The keyless entry system according to claim 1 wherein the at least one symbol comprises a logo associated with a vehicle.

14. The keyless entry system according to claim 1 wherein the at least one symbol comprises a name of a user.

15. The keyless entry system according to claim 1 wherein the at least one symbol comprises a name of a favorite sports team of a user.

16. The vehicle door handle according to claim 1 wherein the illumination source is mounted behind the plurality of sensors.

17. A vehicle door handle mounted to a door and coupled with a latch operable between a latched condition, wherein the door is prevented from opening, and an unlatched condition, wherein the door can be opened, the vehicle door handle comprising:

a grip movably mounted to the door and coupled with the latch for operating the latch between the latched and unlatched conditions, the grip having a first surface facing generally outwardly away from the door, and a second surface facing generally inwardly toward the door;

a keyless entry pad associated with the grip, comprising a portion of the first surface and defining a plurality of keys, each one of the plurality of keys identified with a corresponding symbol to collectively form a textual representation of at least one of the vehicle and a user of the vehicle, the plurality of keys being immovable relative to the grip cover;

a plurality of sensors, each sensor in proximity to at least one of the plurality of keys and corresponding symbol, for detecting an object in the vicinity of at least one of the plurality of keys;

an illumination source adapted for selective illumination to selectively backlight the plurality of sensors and corresponding symbols; and

a light-controlling membrane extending over at least a portion of the keyless entry pad comprising a portion of the first surface;

wherein entering a keyless entry code into the keyless entry pad by selecting keys in a predetermined sequence enables the latch to be selectively disposed in either a locked condition or an unlocked condition; and

wherein in ambient light, the light-controlling membrane renders the at least one symbol invisible, and when the illumination source backlights the at least one sensor and the at least one symbol, the light-controlling membrane renders the at least one symbol visible.

18. The vehicle door handle according to claim 17 wherein activating the keys in a predetermined sequence comprises selecting the at least one symbol in a predetermined sequence.

19. The vehicle door handle according to claim 17, and further comprising an illumination source holder mountable to the handle housing in adjacent disposition to the sensor keypad, and an illumination source assembly supported by the illumination source holder for backlighting the keypad.

20. The vehicle door handle according to claim 17 wherein the keyless entry pad and the plurality of sensors comprise separate and distinct assemblies.