Oral controller method and apparatus

• US 5,233,662 A
• Filed: 11/05/1991
• Issued: 08/03/1993
• Est. Priority Date: 11/05/1991
• Status: Expired due to Term

• Current Assignee: Chris S. Christensen
• Original Assignee: Chris S. Christensen
• Inventors: Christensen, Chris S.
• Primary Examiner(s): Isen, Forester W.
• Application Number:
  US07/787,896
• Time in Patent Office: 637 Days
• Field of Search: 381/70, 341/21, 340/825.19, 340/407
• US Class Current: 381/70
• CPC Class Codes: A61F 4/00 Methods or devices enabling patients or disabled persons to operate an apparatus or a device not forming part of the body operating or control means for prostheses A61F2/48, A61F2/68
• CPC Class Codes: G06F 3/011 Arrangements for interaction with the human body, e.g. for user immersion in virtual reality blind teaching G09B21/00

Abstract

An oral controller and related method for lingual control of remote apparatus are disclosed. Preferably, the controller includes a mouthpiece having an intraoral structure and lingual transducer electronics including an array of photosensitive switches the light beams of which are selectively temporarily interruptible by the placement of the user'"'"'s tongue in a light beam'"'"'s path. A normally open electrical contact switch and associated circuitry including one or more batteries are provided for detecting closure of this switch when the mouthpiece is properly placed in the user'"'"'s mouth, at which time controller circuitry within a separate housing is activated and the photosensitive switches are operated at a low, battery-saving duty cycle. Openings of the photosensitive switches are detected, and their sequence encoded and transmitted, e.g. in the form of an audio signal or a luminous, ultrasonic or RF (modulated) carrier signal, to a remote wireless receiver capable of decoding the lingual placement sequences into symbolic control codes, e.g. computer commands. Preferably, the transmitter or receiver produces an audible tone representing the control code to provide aural feedback to the user. In a proposed modification to the invention, all switch, transducer and transmitter circuitry, including the battery or batteries, are housed in a modified mouthpiece structure the weight of which is partly supported by the user'"'"'s chin.

Claims

1. A method of orally controlling a device through selective placement of the tongue, comprising the following steps:

selectively placing the tongue in the aperture of one of a plurality of intraoral sensors positioned at predetermined locations in the mouth to cause a change of state in the output of said sensor;

selectively placing the tongue in the same or another selected sensor to cause a change of state in the output of the sensor selected; and

detecting and interpreting the outputs of said plurality of sensors in accordance with a coding scheme to produce commands for controlling a device that may be remote from the user.

2. The method as in claim 1 in which said step of placing the tongue in the aperture of an intraoral sensor includes interrupting a light beam to open a photosensitive switch.

3. The method as in claim 1 in which said step of placing the tongue includes selectively placing the tongue in one or another of three predetermined locations in the mouth, each said location being the location of the aperture of one of three intraoral sensors positioned in the mouth.

4. An oral controller comprising:

a mouthpiece including a plurality of intraoral sensors, each sensor including an aperture for receiving the tip of the user'"'"'s tongue therein to cause the sensor to output a signal;

a transmitter operatively coupled with said sensors for generating a signal stream indicative of the sequential activation of selected sensors by the user for transmission to a remote receiver; and

a receiver responsive to said signal stream, said receiver decoding said signal stream into one or more coded symbols for controlling a device remote from the user based upon the user'"'"'s selective operation of said mouthpiece sensors in accordance with a predetermined language.

5. The controller of claim 4, wherein said transmitter generates a signal stream that is audible to the user, thereby providing aural feedback aiding accurate tongue placement.

6. An oral controller comprising:

a mouthpiece including an intraoral region having plural normally closed switches operable by the selective placement of a user'"'"'s tongue proximate thereto;

a mouth-placement detection circuit coupled with said mouthpiece for applying power to said switches upon detection that said mouthpiece is in contact with the user'"'"'s mouth;

a transmitter operatively coupled with said switches, said transmitter detecting the opening of each of said switches and generating a signal stream indicative thereof for transmission to a remote receiver; and

a receiver responsive to said signal stream, said receiver decoding said signal stream into one or more coded symbols for controlling a device remote from the user based upon the user'"'"'s selective operation of said switches in accordance with a predetermined language.

7. The controller of claim 6, wherein said switches are photosensitive and are energized periodically at a predefined low duty cycle to preserve power.

8. A lingual transducer comprising:

an intraoral structure including a normally open switch that is closed when said structure is placed is placed in a user'"'"'s mouth, said structure further including at least one photosensitive switch the coupleable terminals of which are supplied with a voltage upon closure of said normally open switch, sad photosensitive switch thereafter being normally closed by a light beam and being actuable by lingual placement in the path of said beam momentarily to interrupt the same and to open said photosensitive switch, and

electronics coupleable with sad structure for detecting such closure of sad normally open switch, supplying thereupon such voltage to said photosensitive switch, detecting such actuation of said photosensitive switch and generating a signal indicative of such lingual placement in the path of said beam.

9. The transducer of claim 8, wherein said intraoral structure includes plural photosensitive switches, further comprising a transmitter operatively coupled with said photosensitive switches, said transmitter detecting openings of said switches and generating a coded signal indicative thereof.

10. The transducer of claim 9, wherein said coded signal is a modulated infrared carrier.

11. The transducer of claim 8, wherein said signal is audible to the user, thereby providing aural feedback aiding accurate lingual placement.