Abstract:
An overhead running vehicle 10 uses an absolute position sensor or an encoder to detect its own position. The overhead running vehicle 10 then reports its own position and state to a system controller 14 via a communication line also used as an electricity feeding line. Further, the overhead running vehicle 10 intercepts reports from other overhead running vehicles 10 to avoid collisions or deadlocks. The system controller 14 and each overhead running vehicle 10 can determine the positions and state of other overhead running vehicles 10. This enables the system to be efficiently operated.
Abstract:
The differential drive circuit generates a differential drive signal having a root mean square value defined by a digital input value. The differential drive signal includes a first differential component and a second differential component. The circuit comprises a first differential component generator and a second differential component generator. The first differential component generator is for counting the clock signal to generate successive values of a periodic count. Each of the values includes a most-significant bit. The first differential component generator is additionally for generating the first differential component in response to successive ones of the most-significant bit of the count. The second differential component generator is for generating the second differential component in response to the digital input value and the successive values of the count.
Abstract:
A semiconductor color sensor implemented without the use of color filters. Fabricating photodiodes using different semiconductor materials provide photodiodes with different sensitivities vs. wavelengths. A first embodiment uses photodiodes with different junction depths. A shallow junction depth produces a photodiode with its sensitivity peak in shorter wavelengths, while a deeper junction depth produces a photodiode with its sensitivity peak in longer wavelengths. Amorphous as well as crystalline structures may be used. A second embodiment uses photodiodes with different materials, such as Silicon-Germanium (SiGe) which has a longer wavelength peak sensitivity, and Silicon (Si) which has a shorter wavelength peak sensitivity in comparison. More than two photodiodes having different wavelength sensitivities may be used. Sensing current ratios between pairs of diodes allows color balance to be maintained.
Abstract:
A display device for providing optical feedback includes light sources, each for emitting light in a different respective wavelength range, electro-optical elements defining pixels of an image, each for selectively passing light in one of the wavelength ranges and a sensor for measuring the intensity of light output from a portion of the electro-optical elements. To provide the optical feedback, a controller activates one of the light sources, alters those electro-optical elements within the portion of the electro-optical elements that are arranged to pass light in the wavelength range of a select one of the light source and reads out the measured intensity from the sensor. Based on the measured light intensity, the controller adjusts an illumination parameter associated with the select light source.
Abstract:
An ultrasonic device determines a position of a user-controlled object within a virtual mouse region. The ultrasonic device includes an ultrasonic transmitter, spatially separated ultrasonic receivers and a processor. The ultrasonic transmitter produces an ultrasonic pulse and radiates the ultrasonic pulse into the virtual mouse region. The ultrasonic receivers receive a reflected ultrasonic pulse reflected from the user-controlled object within the virtual mouse region and produce respective reflected ultrasonic signals in response thereto. The processor determines the position of the user-controlled object within the virtual mouse region based on the reflected ultrasonic signals, and generates a position signal indicative of the position.
Abstract:
Sports equipment includes an embedded optical sensor. The embedded optical sensor includes an image array and a navigation engine. The navigation engine receives image information originating from the image array and performs a correlation on the image information to calculate overlap of images and to determine shift between images in order to detect motion.
Abstract:
The pen input device has both a movement detection system and a position detection system that collectively track the position of the pen input device during a writing operation on a writing surface. The pen input device has a writing tip capable of performing a writing operation in contact with the writing surface. A controller is operable to activate the movement detection system continuously during the writing operation and to activate the position detection system intermittently during the writing operation. The movement detection system is operable to determine movement data that represent changes between successive positions of the writing tip. The position detection system is operable to determine position data that represents a position of the writing tip on the writing surface.
Abstract:
A wavelength selective switching device and method for selectively transmitting optical signals based on wavelength utilizes diffraction to spatially separate the optical signals of different wavelengths such that the optical signal of a selected wavelength can be selectively transmitted. The wavelength selective switching device selectively rotates the polarization components of the optical signals such that the polarization states of the polarization components are the same in both incoming and outgoing directions at the diffraction grating. Thus, a diffraction grating with a high grating line frequency (e.g. greater than 900 grating lines per mm for signals in the 1550 nm wavelength range) can be used for diffracting the polarization components of the optical signals in both the incoming and outgoing directions.
Abstract:
An electrochemical device having an electrode plate assembly that includes: (a) at least one first electrode; (b) at least one second electrode; and (c) a separator interposed between the first electrode and the second electrode, the electrode plate assembly including a PTC device. The use of the electrochemical device according to this invention makes it possible to efficiently manufacture secondary batteries with a simple structure, a high reliability and a high electrical capacity.
Abstract:
Apparatus, packaging, and methods of manufacture of an integrated circuit are provided. The integrated circuit includes a component of a first type fabricated on a first substrate containing a first material, and a component of a second type fabricated on a second substrate containing a second material. The first material has better compatibility than the second material with fabrication and/or performance of the component of the first type, while the second material has better compatibility than the first material with fabrication and/or performance of the component of the second type. Also described, is a method of making the above-mentioned integrated circuit, the method including, among other steps, the step of disposing the first and second substrates opposite one another, and the step of establishing an electrical connection between the components.