Relaying key code signals through a remote control device

• US 8,004,389 B1
• Filed: 08/04/2009
• Issued: 08/23/2011
• Est. Priority Date: 12/16/2003
• Status: Expired due to Term

• Current Assignee: Universal Electronics, Inc.
• Original Assignee: UEI Cayman Incorporated (Universal Electronics, Inc.)
• Inventors: Mui, Daniel SauFu
• Primary Examiner(s): BROWN, VERNAL U
• Application Number:
  US12/462,526
• Time in Patent Office: 749 Days
• Field of Search: 340/825.69, 340/825.22, 340/5.61, 340/4.62, 341/176, 341/174
• US Class Current: 340/13.24
• CPC Class Codes: G08C 15/04 the signals being modulated on carrier frequencies
• CPC Class Codes: G08C 17/00 Arrangements for transmitting signals characterised by the use of a wireless electrical link
• CPC Class Codes: G08C 17/02 using a radio link
• CPC Class Codes: G08C 19/28 using pulse code
• CPC Class Codes: G08C 23/04 using light waves, e.g. infrared

Abstract

Upon receiving a keystroke indicator signal from a remote control device, a key code generator device identifies a codeset usable to communicate with a selected consumer device. The keystroke indicator signal contains an indication of a pressed key, which corresponds to a function of the selected consumer device. Using the identified codeset and the key indication, the key code generator device generates a key code and modulates that key code onto a radio frequency carrier signal, thereby generating a first key code signal. The remote control device receives the first key code signal from the key code generator device and modulates the key code onto an infrared frequency carrier signal, thereby generating a second key code signal. The remote control device relays the key code to the selected consumer device in the second key code signal. The key code causes the selected consumer device to perform the desired function.

Claims

1. A method comprising:

(a) receiving a keystroke indicator signal from a remote control device, wherein the keystroke indicator signal indicates a key on said remote control device that a user has selected;

(b) generating a key code within a key code generator device using the keystroke indicator signal, wherein said key code is part of a codeset that controls an electronic consumer device;

(c) modulating said key code onto a carrier signal, thereby generating a key code signal;

(d) transmitting said key code signal from said key code generator device; and

(e) identifying said codeset by detecting electromagnetic interference on a power cord of said key code generator device.

2. A method comprising:

(a) receiving a keystroke indicator signal from a remote control device, wherein the keystroke indicator signal indicates a key on said remote control device that a user has selected;

(b) generating a key code within a key code generator device using the keystroke indicator signal, wherein said key code is part of a codeset that controls an electronic consumer device;

(c) modulating said key code onto a carrier signal, thereby generating a key code signal;

(d) transmitting said key code signal from said key code generator device; and

(e) identifying said codeset using input from a user of said remote control device, wherein said codeset is identified when said user stops pressing a key on said remote control device.

3. The method of claim 2, wherein said user is prompted by autoscan functionality to press said key on said remote control device.

4. A remote control device comprising:

a receiver that receives a first key code signal, wherein said first key code signal is generated by modulating a key code onto a first carrier signal, said first carrier signal falling within a radio frequency band;

a transmitter that transmits a second key code signal, wherein said second key code signal is generated by modulating said key code onto a second carrier signal, said second carrier signal falling within an infrared frequency band; and

a keypad that includes a key that corresponds to said key code, wherein said key code corresponds to a function of an electronic consumer device, and wherein said remote control device is contained within a single structure.

5. The remote control device of claim 4, wherein said remote control device is taken from the group consisting of:

a learning remote control device, a cell phone, an RF-enabled personal digital assistant (PDA), an RF-enabled wrist watch, and an RF-enabled keyboard.

6. The remote control device of claim 4, wherein a codeset comprises timing information and a plurality of key codes, wherein each of said plurality of key codes corresponds to a different function of said electronic consumer device, wherein said key code is a binary number, and wherein said timing information defines how said binary number is modulated onto said first carrier signal.

7. The remote control device of claim 4, wherein said key code is part of a codeset, and wherein said codeset is not stored on said remote control device.

8. The remote control device of claim 4, wherein said modulating to generate said first key code signal is performed according to a first codeset, and wherein said remote control device stores no codeset other than said first codeset.

9. The remote control device of claim 4, wherein said key code is part of a codeset that includes a plurality of key codes, wherein each one of said plurality of key codes corresponds to a different function of the electronic consumer device, and wherein no more than a single one of said plurality of key codes is present on said remote control device at any given time.

10. The remote control device of claim 4, further comprising:

a microcontroller that determines that a user of said remote control device has selected said key and that modulates said key code onto said second carrier signal.

11. The remote control device of claim 4, wherein said modulating said key code onto said first carrier signal is performed by an electronic consumer device taken from the group consisting of:

a television, a stereo radio, a digital video disk player, a video cassette recorder, a personal computer, a set-top cable television box and a set-top satellite box.

12. A remote control device, comprising:

a keypad;

an RF receiver;

an IR transmitter; and

means for receiving a key code from said RF receiver and for sending said key code to said IR transmitter such that said key code is modulated onto an IR carrier signal, said IR carrier signal with said key code modulated thereon being transmitted from said remote control device by said IR transmitter, wherein said remote control device is contained within a single structure.

13. The remote control device of claim 12, wherein said key code is not stored on said remote control device immediately prior to said means receiving the key code.

14. The remote control device of claim 12, wherein said key code is part of a codeset, and wherein said codeset is not stored on said remote control device.

15. The remote control device of claim 12, wherein said means is a microcontroller.

16. The remote control device of claim 12, wherein said means is for sending said key code to said IR transmitter and for sending a second key code to said IR transmitter without simultaneously storing both said key code and said second key code on said means, wherein said key code corresponds to a selected function of a first electronic consumer device, and wherein said second key code corresponds to said selected function of a second electronic consumer device.