Source: https://patents.google.com/patent/WO1999023524A1/en
Timestamp: 2020-05-26 08:53:17
Document Index: 268638971

Matched Legal Cases: ['Application No. 08', 'Application No. 08', 'Application No. 08', 'art 801', 'arts 800', 'art 801', 'arts 1007']

WO1999023524A1 - Eyeglass interface system - Google Patents
Eyeglass interface system Download PDF
WO1999023524A1
WO1999023524A1 PCT/US1998/022889 US9822889W WO9923524A1 WO 1999023524 A1 WO1999023524 A1 WO 1999023524A1 US 9822889 W US9822889 W US 9822889W WO 9923524 A1 WO9923524 A1 WO 9923524A1
eyeglass interface
PCT/US1998/022889
WO1999023524A8 (en
Mark B. Spitzer
The Microoptical Corporation
1997-10-30 Priority to US6443097P priority Critical
1997-10-30 Priority to US60/064,430 priority
1998-10-29 Application filed by The Microoptical Corporation filed Critical The Microoptical Corporation
1999-05-14 Publication of WO1999023524A1 publication Critical patent/WO1999023524A1/en
1999-06-24 Publication of WO1999023524A8 publication Critical patent/WO1999023524A8/en
210000003128 Head Anatomy 0 claims description 20
G02C11/06—Hearing aids
An eyeglass interface system (100) is provided which integrates interface systems within eyewear. The system includes a display assembly (102) and one or more audio and/or video assemblies mounted to an eyeglass frame. The display assembly is mounted to one temple and provides an image which can be viewed by the user. The audio or video assembly (108) is mounted to the other temple and is in communication with the display assembly. The audio or video assembly may comprise a camera assembly and/or an audio input assembly, such as a microphone and/or speakers.
TITLE Eyeglass Interface System
Ritchey, in U.S. Pat. Nos . 5,130,794 and 5,495,576, discloses a panoramic display and its use in an audio-visual virtual reality/telepresence system. This system is designed specifically to allow immersive interaction with a remote or virtual object. An electronic camera in the nose frame of eyewear has been offered for sale by one organization that provides covert surveillance devices.
BRIEF SUMMARY OF THE INVENTION Full portability for many of these interface systems requires reduction to the portable scale of the user interface. For most applications, it is desirable to have an audio/video interface which is compact and allows hands-free or nearly hands-free operation. In addition, it is desirable that such an interface be unobtrusive and not detract from the appearance of the user. The eyeglass interface system of present invention addresses the need for such an interface, by integrating the complete audio/video interface within eyewear . The eyeglass interface system uses an eyeglass optical system or display assembly such as that in accordance with U.S. Patent Application No. 08/844,098, filed on April 18, 1997, the disclosure of which is incorporated by reference herein. More particularly, the eyeglass interface system of the present invention comprises an eyeglass frame having first and second lens holders and first and second temples configured to be supported on a user's head. The display assembly used in the eyeglass interface system comprises an image source supported by the first temple, an optical pathway disposed internally within the first lens to receive light from the image source, and an insert in the first lens to redirect light on the optical pathway to the user's eye, as described more particularly in U.S. Pat. Application No. 08/844,098. An audio and/or video assembly is mounted to the second temple, preferably in communication with the display assembly. The audio and/or video assembly is operative to receive or transmit audio and/or video signals. Interface circuitry is provided in communication with the display assembly and the audio and/or video assembly.
In a typical configuration according to the present invention, the display assembly is mounted within one half of the eyeglasses. The audio and/or video assembly comprises a camera assembly mounted within the other half. The system may also include audio transducers (microphone and/or speakers) which provide audio data and/or which collect sound for recording, digital signal processing and analysis. In this way, the microphone may also provide voice activated commands to the system. Additionally, the eyeglass system may include batteries and an RF or infrared communication system to eliminate the need for a cable to the glasses. Various types of systems may be formed using one or more of the subsystems. In its most complete form, the present eyeglass interface system includes the following subsystems or assemblies: an audio input assembly for collecting speech input from the user, a display assembly, an audio output assembly, a camera assembly, and a head-tracking assembly to provide a computer with the position of the user's head. Thus, the eyeglass interface system includes audio, video, tracking and power modules .
The eyeglass interface system of the present invention provides computer input and output in highly compact forms, preferably entirely within eyeglasses, which look to the casual observer like ordinary eyewear. In some embodiments of the invention, the subsystems or assemblies are entirely concealed within the eyeglass frame and lenses. The invention comprises not only the integration of the hardware subsystems within an eyeglass frame, but also the integration of the subsystems with hardware and software intended for specific functions .
The integration of the camera and display within eyewear according to the present invention provides eyewear that is more compact and therefore easier to wear than prior art devices, and is more aesthetically appealing, because it looks like eyeglasses. The present invention uses optics embedded in the eyeglass lens rather than suspending them in a mount , making the system more durable . The present invention incorporates audio and video inputs as well as outputs. The audio assembly may be integrated into the eyeglass frame. Details of the visual display are not used in conjunction with normal hearing, and therefore one embodiment of the present system integrating an audio assembly seeks to avoid attenuating external sounds. The current system allows the user to interact with computer generated or other electronically relayed information without requiring the occlusion of the actual surroundings.
Fig. 1 is an isometric view of an eyeglass interface system according to the present invention; Fig. 2 is a top plan view of an eyeglass interface system incorporating a camera system;
Fig. 6 is a top plan view of a still further embodiment incorporating a camera system; Fig. 7 is a schematic view of an eyeglass interface system operable with optical character recognition;
Fig. 11 is a side view of an eyeglass temple incorporating an audio system; Fig. 12 is a partial top plan view of the eyeglass system of Fig. 11; Fig. 13 is an exploded view of a temple of an eyeglass interface system incorporating integrated circuits in a multi -chip module;
Fig. 14 is a cross-sectional view taken along line 840-840 in Fig. 13;
Fig 20 is a top plan view of an eyeglass interface system with plug-in module; and
DETAILED DESCRIPTION OF THE INVENTION Fig. 1 illustrates an eyeglass interface system 100 according to the present invention. Within one half of the eyeglass system is mounted a display assembly 102, and within the other half is mounted a camera assembly 104. The display assembly, as well as some aspects of a camera assembly, are described in U.S. Pat. Application No. 08/844,098. Additional subsystems or assemblies include an audio output subsystem
108 an audio input subsystem 106 such as a microphone, an interconnection subsystem 110, and a power subsystem 112, such as internal batteries. Any number or all of these subsystems may be integrated to form an eyeglass interface system according to the present invention. The integration of a camera assembly within eyewear is important for a number of applications, including image acquisition, data input by character recognition, bar code scanning, face recognition, and the like. The key factors which must be addressed in order to integrate a camera within eyewear are (i) portability, and (ii) making the camera adjustable so that it is aimed precisely where the user is looking with his or her eyes. This second factor is key for data input by character recognition. For example, if one is looking at a notepad and writing characters, the camera can be positioned within the eyewear so that the notepad is within the field of view of the camera. The characters written by the user can then be photographed by the camera and fed to a character recognition processor. Such a system can replace the keyboard as the data input device for portable applications. Currently, such functions are provided by touch sensitive screens, such as on the Palm Pilot and other pen-based data entry devices. A camera has the distinct advantage that it can work with ordinary pencil and paper. A scanner may also be built from a camera mounted within eyewear. Text that the user reads can be automatically fed to the computer, recognized, and stored.
The camera's field of view is obtained through the lens 280 held within frame front 200. This facilitates concealment of the camera. Further concealment may be obtained by tinting the lens, or by using polarization coatings, or by other means known in the art. If concealment is not desired, the camera may be mounted on the outside of the temple. It should also be recognized that the camera may be mounted on either the left side (as shown in Fig. 2), or the right side. Alternatively, cameras may be mounted on both sides of the eyeglasses .
Fig. 7 illustrates a data input system based on optical character recognition. A user wearing the eyeglasses with camera, as described above, views a written object 700. The camera provides the raw video data to a video processor 704 (also known as a frame grabber) which stores in the memory of a computer 706 an image of the scene taken by the camera. The image is processed by the character recognition code in the computer 706 to determine the nature of the information and may be output to a display 708. In the same manner as text input is derived from a keyboard, the characters are stored in a buffer until the code detects a control character
(the equivalent of a carriage return) . The instruction is then executed. In a similar manner, the device may operate as a scanner. Images are stored in memory and a code is executed to construct a large image from the sequential frames. Another application involves the collection of video imagery. The video is collected by the camera and provided to the video processor which compresses the video stream and stores it within memory.
A bar code reading system may be built using the integrated system. It comprises eyeglass optics, display and camera as shown in Fig. 8. The image of the bar code is centered in the eyepiece of the right lens 280 so that the bar code stripes 710 are relayed to the image sensor 510. The camera system may be provided with autofocus as previously described. As shown in Fig. 9, the image from the sensor is provided electronically via video interface 712 to a computer 714 that employs character or pattern recognition to decode the stripes . The computer can be programmed with look-up tables 716 for universal price codes or any other bar codes, so that the output of the computer is then the decoded information in alpha-numeric characters, symbols or graphics. These characters are relayed electronically from the computer 714 via a display interface 718 to the display 720 mounted within the eyeglasses, so that the user sees the decoded information in the display.
In all of the above applications, it is necessary for the camera to record the view that the user has . The advantage of a camera mounted in eyewear is obtained, because the camera is aimed at the user's subject by virtue of its alignment within the eyeglasses.
Many important devices can be constructed with this simple arrangement. If the camera sensor comprises a long wavelength infrared focal plane array or other sensor, then the device allows the user to have vision in the long wavelength range which is well suited for vision through smoke. Firefighters use long wavelength sensors to find people in smoke-filled buildings in which the performance of ordinary vision is poor. Additionally, systems of this type can be configured for enhanced night vision by using infrared image sensors, or by using highly sensitive low-light image sensors. The system can also serve in surveillance applications in which imagery from one set of eyeglasses is transmitted to a second set. This allows a surveillance team to share images .
As shown in Fig. 11, a bone conductivity transducer 810 serving as the speaker may be mounted to the temple 800 of an eyeglass frame so as to be in contact with the skull at a point approximately centered over the ear. The transducer may be mounted on a sliding mechanism in the manner of the camera sensor described earlier. The transducer is mounted on the inside of the temple for adequate contact to the head. The temples are provided with adequate tension so as to press the transducer comfortably to the skin. The sliding mechanism allows the user to adjust the position for best fit. The transducer is in communication with the rest of the system through leads 820 which may extend through a cavity 830 within the temples (Fig. 12) . The leads may be made from flexible stranded insulated wire, flexible coaxial cable, or flexible circuitry based on Kapton or other polymeric material. By using flexible material, the position of the transducer may be adjusted without strain to the leads.
One or more bone conduction microphones may be mounted within the eyeglass frame, including within the nose piece, to sense the vibration produced by the user's speech. Alternative positions for bone conduction microphones are along the temple or at the back of a temple behind the ear. In some cases the microphone may be mounted in an attached earpiece which may be inserted into the ear. Alternatively a directional air conduction audio microphone may be used by placing it at the bottom of the eyeglass frame oriented so as to preferentially detect the sound of the user's speech. A plurality of microphones may be used in order to make possible the implementation of noise reduction techniques using analog or digital signal processing. For certain applications, it is desirable to sense ambient sound instead of or in addition to the user's speech. In that case, an air conduction microphone similar to ones used in hearing aids may be used in any convenient place along the eyeglass frame. For the particular application of assisting the hearing impaired, the microphone would be so oriented so that sound coming from the area in front of the user is preferentially detected, in alignment with the camera direction if one is used. Alternatively, an external microphone may be used for this application. In order to accommodate the integrated circuits and flexible interconnect circuitry within the eyeglass temple, the eyeglass temple may be made hollow so as to house the circuits. Additionally, if the temple is made from metal or is metal coated, the circuits can be shielded so that the radio frequency interference from the internal circuits is minimized. Although flexible Kapton circuitry may be used as a substrate and interconnect for the internal electronics, alternatively it is possible to design a multichip module
(MCM) and package using the eyeglass temple as a housing, as illustrated in Fig. 13. The metal temple 800 is provided with a cavity 846 having a mounting edge 845 designed to fit with a second part 801 which has an edge 847 that mounts against edge 845. The two parts 800 and 801 mounted together form a closed cavity. Part 801 forms the substrate for an MCM and is coated with multi-layer ceramic and conductive patterned layers 848 as is known in the art which provide the interconnection paths to the integrated circuits 849 that are mounted in die form upon the layer 848. Fig. 14 shows a cross section taken along line 840 which shows the enclosure formed when temple 800 is joined to the MCM substrate 801. The MCM may be connected electrically to the other subsystems by wires or flexible interconnect which are not shown in the figures .
The use of an IR system is illustrated in Fig. 18. A notebook computer or other device 995 is viewed by a user along lines of sight 992 or other similar lines of sight to the device, resulting in a general orientation of the head toward the screen or keyboard of device 995. An LED and detector pair 994 which sends and receives IR signals is positioned on the device 995 so as to be near or within the field of view of the device 995, as shown in Fig. 18. Ray 991 is incident upon a light receiving area of the eyeglasses, defined for example by lens 950 in Fig. 19. The light 991 collected by lens 950 enters the main lens 280 and reflects from the back side of mirror 276 toward IR LED and detector pair 930. Other optical configurations are possible, including locating the pair 930 in the other main lens, and/or configured without the need for mirror 276 or lens 950. Additionally, if the camera is provided with an IR sensor, the detection of the signal may be made directly at the camera sensor 510. The integration of microphones, speakers, camera and display within or upon the eyeglass frames makes possible a wide range of communication and recording devices, in addition to computer input and output devices. A multi-media interface module, comprising one, several, or all of the audio and video subsystems, has numerous applications when combined with the appropriate circuitry. Fig. 20 illustrates a system with a plug-in module 1001 located on a strap 1002 behind the head. The strap may contain within it batteries, electronic circuits, and wires and may also be fitted to hold the glasses in position in the conventional manner. The strap may be flat if it contains Kapton flex circuitry, or it may have a rectangular or other cross section. The glasses may be fitted with audio transducers 1004, electronics 1005 to drive a flat panel display 1006, a camera sensor 1008 and related electronic and mechanical parts 1007 as previously described herein. Alternatively, the internal circuitry of the plug- in module 1001 may be permanently mounted within the eyeglass frame 1003. If the circuitry is too large for integration in the eyeglass frame, and is also too large for head mounting, the strap 1002 may be lengthened so that the plug- in module 1001 can be placed in a pocket or worn on a belt.
The interface system may be connected to an information sending unit or may be fitted with an RF receiver for reception of critical information, located within module 1001. This information system may be, but is not limited to, a general function computer such as a notebook computer. For example, a receiver may be mounted in the eyeglass frame to display simple alpha-numeric characters. A transmitter in communication with this receiver may be provided with a blood pressure or other vital sign monitoring device, so that a surgeon may be provided with vital sign data for a patient. In this way the data is available to the surgeon in a hands- free manner and without the need for the surgeon to look away from the incision. Many other similar information systems are possible. For example, an electronics engineer may be provided with a display of the output of an oscilloscope or network analyzer. In this way, the engineer can see the output of the measurement device without the need to look away from the device under test.
The camera and microphone within the glasses allow the system to perform many of the functions of a camcorder or still camera. Audio and video may be recorded in electronic memory and then may be transmitted to tape or disk storage media. The advantages over current camcorders are that the interface system, including the camera, is largely hands- free. The only requirement is that the user activate the recorder either by spoken command or by the use of buttons on the recording device. A head tracking position sensor can be used to stabilize the image. In such a device, the recording device (for example, tape recorder, recordable digital video disk system, recordable compact disk system) are located in module 1001. The camera system comprises standard CCD or CMOS image sensors that are commercially available from Texas Instruments, Kodak, and other sources. These sensors are used in camcorders and electronic cameras. The image sensors are combined with the eyeglass optics so that the camera has a view of the world as seen by the user's eye. The camera may be mounted in the same optical system as the display, or as shown in Fig. 1, the camera system optics may be mounted for use in the right eye, and the display system optics for use in the left eye. The head tracking module is useful for augmented reality applications in which information displayed by the interface system is superimposed on the user's field of view by the optical system. For example, computers are used to calculate position from global positioning satellites to provide navigation information to a user. If the system also has information on the direction of gaze of the user, by virtue of a head-tracker sensor, symbols may be provided that are registered to the field of view, such as street names. When the user looks toward a side street, the computer may calculate the position of the intersection of the streets and present the name of the crossing street to the user. Many other applications of augmented reality are possible.
The tracking sensors may comprise either magnetic and gravity sensors that determine position from the earth's magnetic and gravitational fields, or from other artificial magnetic fields. Sensors may be mounted in module 1001 if it is held against the head or alternatively within the eyeglass frame. The magnetic sensor may be based on the Hall effect or may use flux gate magnetometers. Any sensor that detects magnetic field strength and direction may be used in this application, provided the sensor is small enough to fit within an eyeglass frame or module. An alternative is to position magnetic sensors within module 1001 which is worn upon the shoulders of the user, and to place small magnets within the glasses frame. In this way the magnetic sensors can determine the user's head position. Many other types of sensors may be used for the head tracking system, including miniature gyroscopic or other inertial sensors, ultrasonic sensors, and even systems that use images from the camera system to detect head movement . The eyeglass module can be used for video conferencing.
In this application, the interface system comprises a display, camera, associated optics, and audio system in communication, either by wire or local RF, with a transceiver which is itself in communication with the video conferencing partner. Video conferencing systems with standard CRT video and microphone/speaker audio are known in the art. In the present invention, the user receives information in audio and video form through the system interface (display and audio subsystems) and transmits information from the system interface, this information being collected from the microphone and camera. In a video conference, the user transmits to the conference images he sees. Alternatively, the user may face a mirror to transmit his own image. The improvement over the prior art is the high degree of portability offered by this invention. Many surveillance systems are possible using the interface system, including systems in which the surveillance is concealed by the eyeglass frame. The system may be used by law enforcement personnel to transmit audio and video between agents, in a manner similar to the video conferencing application. For example, an agent on the street may see an image collected by an agent on a roof top. Another application involves patient monitoring in hospital intensive care units. A third surveillance application comprises a baby monitor. The glasses may receive images and audio from a camera located in a nursery so that the parent may see and hear the baby from anywhere in the house .
The interface system may be applied in telepresence systems, in which the user receives visual and audio information from a remote source, as if he were present at the remote source. A transmitter at the remote source collects information from the environment and sends it to the receiver. As shown in Fig. 21, the remote system is configured with two cameras, one in each eye as shown, and two microphones near the left and right ears. The receiving system comprises an interface module fitted with two displays and two audio transducers so that the resulting receiving system displays information as it is collected from the transmitting sensor. In this manner, the user has the sensation of presence at the remote location. The invention is not to be limited by what has been particularly shown and described, except as indicated by the appended claims.
1. An eyeglass interface system comprising: an eyeglass frame having first and second lens holders and first and second temples configured to be supported on a user' s head; a first lens disposed within the first lens holder and a second lens disposed within the second lens holder; and a display assembly comprising: an image source supported by the first temple, an optical pathway disposed internally within the first lens to receive light from the image source, and an insert in the first lens to redirect light on the optical pathway to the user's eye; an audio or video assembly mounted to the second temple and in communication with the display assembly, the audio or video assembly operative to receive or transmit audio or video signals; and interface circuitry in communication with the display assembly and the audio or video assembly.
2. The eyeglass interface system of claim 1, wherein the audio or video assembly includes a camera assembly.
13. The eyeglass interface system of claim 1, wherein at least one of the first and second temples is hollow and the interface circuitry comprises a multi-chip module disposed within the at least one of the first or second temples.
15. The eyeglass interface of claim 1, wherein the interface module is mounted on a strap attached to the first and second temples .
17. The eyeglass interface system of claim 1, wherein the interface circuitry further comprises a connection to remote electronics .
18. The eyeglass interface system of claim 16, wherein the connection to remote electronics comprises an electrical wire, an infrared link, a radio frequency link, or a fiber optical cable.
21. An eyeglass interface system comprising: an eyeglass frame having first and second lens holders and first and second temples configured to be supported on a user's head; a first lens disposed within the first lens holder and a second lens disposed within the second lens holder; and a camera assembly mounted to the first temple, the camera assembly having a lens directed to view the field of view through the first lens.
22. The eyeglass interface system of claim 21, further comprising an image source assembly comprising: an image source supported by the second temple; an optical pathway disposed internally within the second lens to receive light from the image source; and an insert in the second lens to redirect light on the optical pathway to the user's eye.
23. The eyeglass interface system of claim 22, wherein the camera assembly is in communication with the image source assembly to feed images viewed by the camera assembly to the image source assembly.
24. The eyeglass interface system of claim 21, further comprising a processor in communication with the camera assembly, the processor operative to receive video images from the camera assembly and recognize the video images as commands .
31. The eyeglass interface system of claim 21, further comprising an audio transducer mounted to one of the first or second temples .
32. The eyeglass interface system of claim 21, wherein the audio transducer comprises a speaker or a microphone.
34. The eyeglass interface system of claim 32, wherein the audio transducer is slidingly mounted to one of the first or second temples.
39. The eyeglass interface system of claim 37, wherein the base is slidably mounted to the temple within one or more tracks .
55. An eyeglass interface system comprising: an eyeglass frame having a lens holder assembly configured to hold a pair of lenses and first and second temples configured to be supported on a user's head; a cavity formed within the first temple; an audio or video assembly mounted to one of the first or second temples, the audio or video assembly operative to receive or transmit audio or video signals; interface circuitry in communication with the audio or video assembly, the interface circuitry comprising a multi- chip module disposed within the cavity.
56. The eyeglass interface system of claim 55, wherein the multi-chip module includes a substrate comprising conductive patterned layers .
57. The eyeglass interface system of claim 55, wherein the substrate is formed on a cover member configured to close the cavity in the first temple.
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EP98955183A EP1027627B1 (en) 1997-10-30 1998-10-29 Eyeglass interface system
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DE69840547A DE69840547D1 (en) 1997-10-30 1998-10-29 Interface system for glasses
WO1999023524A1 true WO1999023524A1 (en) 1999-05-14
WO1999023524A8 WO1999023524A8 (en) 1999-06-24
ID=22055919
PCT/US1998/022889 WO1999023524A1 (en) 1997-10-30 1998-10-29 Eyeglass interface system
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EP (1) EP1027627B1 (en)
JP (1) JP2001522063A (en)
CA (1) CA2307877C (en)
DE (1) DE69840547D1 (en)
WO (1) WO1999023524A1 (en)
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1999-06-24 AL Designated countries for regional patents
1999-06-24 CFP Corrected version of a pamphlet front page
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