Abstract: A method and apparatus determining an intensity of light flux. First, a photodiode or LED is charged by reverse-biasing to a fixed voltage. The fixed voltage is a sum of a threshold voltage and a predetermined offset voltage. Then, a time to discharge the photodiode to the threshold voltage by a photo current is measured to determine an intensity of light producing the photocurrent.

Abstract: In a real-time retail display system, displays are updated with content in an interactive manner based upon current behavior of the consumers and historical trends. A network of sensors provides real-time information to the system, including a combination behavioral and demographic data. Based upon available data, the system updates the displays as a function of the content presented, demographic information, and consumer behavior.

Abstract: An automatic backlight turns on before a user hits a key, but only in dark lighting conditions. A capacitive proximity sensor detects active handling of the device and the backlight itself is used as a light sensor. The circuit requires only a single additional capacitor and three free I/O pins to implement on typical microprocessor-based systems (such as remote controls). Because the system uses the current backlight LED as a sensor, devices can often be upgraded to include this feature without changing the existing packaging.

Abstract: An automatic backlight turns on before a user hits a key, but only in dark lighting conditions. A capacitive proximity sensor detects active handling of the device and the backlight itself is used as a light sensor. The circuit requires only a single additional capacitor and three free I/O pins to implement on typical microprocessor-based systems (such as remote controls). Because the system uses the current backlight LED as a sensor, devices can often be upgraded to include this feature without changing the existing packaging.

Abstract: The present invention provides an automatic picture taking system at a theme park. The system is passive, with guests photographed automatically from a plurality of cameras distributed throughout the theme park. When a picture is taken, the camera broadcasts a code signal that is associated with that picture or image. A code receiver carried or worn by the guest receives the code and stores it in a memory associated with the receiver. The system assumes that any guest that receives the code must have been in the picture when it was taken. At any time, a guest may elect to review the pictures taken so far of the guest by visiting a location for that purpose. When the pictures are taken digitally, for example, the pictures can be provided by a central server to any of a number of locations. The guest may elect to purchase some or all of the pictures that include the guest. In one embodiment, the images are photographs, while in others the images may be videos or a combination of photographs and videos.

Abstract: A wireless liquid sensing system includes a beverage container and a table top for holding the container. Embedded in the walls and bottom of the container are two electrically conductive plates coupled to a transponder wire coil. A reader radiates an RF signal at a predetermined frequency through a reader antenna. A microprocessor, also coupled to the transponder coil and the two plates, is powered by a rectifier circuit that gains power from then radiated RF signal. The microprocessor amplitude modulates the RF signal in accordance with the amount of liquid in the container. The reader can then detect this modulation with a peak detector to sense the amount of the substance in the container when the transponder antenna is inductively coupled to the reader antenna at the predetermined frequency.

Abstract: A system records a sequence of frames of a video in circular buffers. Each buffer is configured to store the frames in a sequential order. Disjoint sets of frames are selected from the video. There is one set of frames for each buffer such that a first set selects a first fraction of the frames, each subsequent set of frames is a smaller fraction then a previous set of frames, and a last set of selected frames includes remaining frames. The sets of frames are stored sequentially in the corresponding buffers.

Abstract: A multi-user touch system includes a surface on which are a pattern of mounted antennas. A transmitter transmits uniquely identifiable signals to each antenna. Receivers are capacitively coupled to different users, the receivers are configured to receive the uniquely identifiable signals. A processor then associates a specific antenna with a particular users when multiple users simultaneously touch any of the antennas.

Abstract: A multi-user touch system includes a surface on which are a pattern of mounted antennas. A transmitter transmits uniquely identifiable signals to each antenna. Receivers are capacitively coupled to different users, the receivers are configured to receive the uniquely identifiable signals. A processor then associates a specific antenna with a particular users when multiple users simultaneously touch any of the antennas.

Abstract: A telephone handset dynamically buffers a real-time audio signal. The handset includes a microphone and a speaker connected to a telephone network interface. A proximity sensor is located near the speaker of the handset. The proximity sensor is connected to a circuit for measuring a coupling between the handset and an ear of a user. A buffer continuously records the real-time audio signal. The recorded signal can than be played back after the handset is first removed from the ear of the user, and second re-applied with the ear of the user using a time-compressed audio signal, until the playback signal is resynchronized with the real-time audio signal.

Abstract: A system and method for utilizing electronic tokens to increase broadcasting tokens is disclosed. Electronic tokens comprise encoded data that are embedded within broadcasting content and radiated from broadcast appliances, such as in the inaudible ranges of an acoustic spectrum or in an electromagnetic spectrum. The radiated tokens are then captured by a token capture device (TCD) possessed by a consumer. Upon receipt of the token from the broadcast, the TCD processes the token and becomes of value to the consumer. For example, the token may cause the TCD to light up, indicating that the consumer has won a prize. A TCD having indication of token receipt thereon may then be redeemed by the consumer for a prize, thus generating incentive for viewing the broadcast and using the TCD to capture the tokens embedded therein.

Abstract: An apparatus detects individual guest interactions in an installation (10) for entertaining one or more guests (12). The apparatus comprises one or more directional, velocity-dependent sensors (24), each motion sensor having a field of view covering a different one of the guests. The motion sensor generates a guest-interaction signal (26) when the guest in its field of view moves in an appropriate manner. The motion sensor can be arranged directly above or in front of the guest, depending on the type of motion that is desired to be detected. The sensor can employ an ultrasonic signal to detect motion, which is less susceptible to light and radio-frequency interference. A controller (22) responds to the guest-interaction signals and manipulates a plurality of guest interfaces (18,20,21).

Abstract: A CMOS level shift circuit with active pull-up uses a pair of pull up transistors activated during the period when an output node needs to be rapidly pulled up. The pull up transistors are activated by the outputs of a combinatorial logic or memory circuit detecting when a change of input signal has occurred and activating the respective pull up transistor to bring the output to the proper state.