Screen ( 10 ) for a user interface of a television schedule system and process consists of an array ( 24 ) of irregular cells ( 26 ), which vary in length, corresponding to different television program lengths of one half hour to one-and-one half hours or more. The array is arranged as three columns ( 28 ) of one-half hour in duration, and twelve rows ( 30 ) of program listings. Some of the program listings overlap two or more of the columns ( 28 ) because of their length. Because of the widely varying length of the cells ( 26 ), if a conventional cursor used to select a cell location were to simply step from one cell to another, the result would be abrupt changes in the screen ( 10 ) as the cursor moved from a cell ( 26 ) of several hours length to an adjacent cell in the same row. An effective way of taming the motion is to assume that behind every array ( 24 ) is an underlying array of regular cells. By restricting cursor movements to the regular cells, abrupt screen changes will be avoided. With the cursor ( 32 ), the entire cell ( 26 ) is 3-D highlighted, using a conventional offset shadow ( 34 ). The offset shadow ( 34 ) is a black bar that underlines the entire cell and wraps around the right edge of the cell. To tag the underlying position—which defines where the cursor ( 32 ) is and thus, where it will move next—portions ( 36 ) of the black bar outside the current underlying position are segmented, while the current position is painted solid.

User interface for television schedule system

In a first heterojunction bipolar transistor (HBT) of the present invention, base layers and collector layers are respectively divided into a plurality of layers and one of the base layers provided closer to the collector layer reiogn is set lower in impurity concentration than the other thereof provided closer to an emitter layer, thus solving a problem that thermal histories during epitaxial growth or during processes cause a set impurity distribution to be destroyed due to diffusion and thus a heterojunction is shifted from a p-n junction. Since minority carriers in the base can smoothly flow toward the collector, there can be realized an excellent HBT having a very high current gain and a very high cut-off frequency. In a second HBT of the invention, a base region comprises a first base layer of a low concentration having the same energy band gap as an emitter region and to be changed to a complete depletion layer in a thermally balanced state and a graded second base layer of a high concentration, and the first and second base layers form a heterojunction, thereby realizing an excellent HBT having a high speed performance which can exhibit a sufficient grading effect while preventing deterioration of an emitter-base voltage withstanding characteristic.

Heterojunction bipolar transistor

The present invention is directed to a video recorder having user extended and automatically extended time slots. An embodiment of the present invention includes a set top box having an internal storage device, such as a hard drive where broadcasts are transferred from a broadcast input source to the storage device. The set top box is connected to an output device such as a television, which displays a graphical user interface (GUI) and an interactive program guide (IPG). The user has the option to extend a chosen time slot, in which a show is scheduled to be transferred to the storage device. The time slot may be extended before the show, after the show, or both. The system also implements an automatic extension of the time slot by default, which is used to ensure that the data is completely captured to the system, in case the broadcast and the set top box are slightly out of sync, the broadcaster unexpectedly begins a show's broadcast slightly early or late, or the show unexpectedly runs longer than the IPG indicates.

Video recorder having user extended and automatically extended time slots

Stable magnetic field measurement is enabled without collapse of polarization or fluctuation of intensity of a laser beam incident on a glass cell of an optical pumping magnetic sensor Excitation light generated with a light source, having optimized light intensity and polarized wave, through frequency stabilization, intensity control and polarized-wave control, is introduced via a polarized wave holding optical fiber to a magnetic sensor provided in a magnetic shield, and magnetic field measurement is performed by optical pumping using magneto-optical properties of spin-polarized alkali metal The magnetic sensor has a structure where a lens, a polarization optical device, the glass cell and a photodetector, are integrally accommodated in a non-magnetic case

Optical pumping magnetometer

In an automatic bread maker, after the temperature of temperature control means (7) reaches a predetermined temperature, the rate of energization of a heater (2) is fixed by control means (14), and by doing so, bread, having a predetermined baking color, can be stably prepared.

Automatic bread maker

PURPOSE: To improve the measurement accuracy and reliability and to prevent the optical coupling loss from increasing by making linear polarized light which is emitted from an input-side optical fiber incident on an output-side optical fiber through a Pockels material, a 1/4-wavelength plate, and an analyzer. CONSTITUTION: Linear polarized light emitted by a semiconductor laser 12 is made incident on the characteristic axis of polarization of the polarization plane maintaining type input-side optical fiber 13 which has an extremely small core diameter. The light is propagated in the optical fiber 13 while maintaining the linear polarization and becomes parallel light through a self-convergent lens 14, and the light is shifted in phase corresponding to a voltage applied from an electrode when passing through the Pockels material 16 to become ellipsoidal polarized light. This phase shift is converted by the analyzer 18 into intensity variation and the light is converged on the multimode type output-side light fiber 20 having a large core diameter through a self-convergence type lens 19 and propagated, so that variation in the quantity of light proportional to the level of the voltage is obtained. Consequently, a polarizer can be omitted and the light is coupled from the optical fiber 13 with the small core diameter to the optical fiber 20 with the large core diameter, so that the loss is prevented from increasing. COPYRIGHT: (C)1987,JPO&Japio

Optical fiber type voltage sensor

PURPOSE:To increase the transmission distance, by constituting the light emitting element and photo detector through the lamination of the photo detector of which center sensitivity is at the wave length region different from that of the light emitted from the light emitting elements, and reducing the transmission loss at the mono- line bidirectional communication. CONSTITUTION:The photo detecting section 23 taking the center wave length lambda2 different from that lambda1 emitted from the light emitting section 21 and the wave length region, is laminated via the photo absorbing substance 22 to form the light emitting element and photo detector 9 and 10, and the characteristics of the photo absorbing substance are constituted so that they pass the light taking the wave length lambda2 as the center wave length and absorbs the light the wabe length lambda1 as the center wave length. The elements 9 and 10 with this constitution are connected to the junction point 12 of the transmission fiber 11 to from the monoline bidirectional communication circuit. Further, the number of the junctions of communication circuit 12 reduced and the branch and coupling units are made unnecessary, to reduce the transmission loss.

Light emitting element and photo detector

PURPOSE:To enable the light signal being transmitted to be branched by wavelengths and enable the light signals of different wavelengths to be superposed by providing a multilayer dielectric film having an inclination of a specified angle with respect to the axis of transmission paths to part of the light signal transmission paths.

Light signal propagator

PURPOSE:To measure current over a wide range at high accuracy by detecting Faraday amount of rotation using two or more rays different in wavelength. CONSTITUTION:Two kinds of magnetooptic bodies 6, 7 different in Verdet constant are put in layers near a wire in which current to be measrued is flowing through a wavelength separation filter 9, and an optical body 21 provided with a mirror 8 is placed on the back side. Two kinds of laser beams 10', 11' different in wavelength are composed by a filter 12 and passed through the optic body 21. Then, it is resolved by a filter 13 and the amount of rotation of polarization is detected by polarization prisms 14, 15 and light receivers 16, 17. By this way, domains of small current and large current can be measured independently, and accurate measurement of current of each domain is made possible.

Current measuring device

PURPOSE:To obtain a stable optical output against the variation of the ambient temperature by arranging a Farady element between a semiconductor laser light source and an optical output monitor part. CONSTITUTION:A Farady element 4 is provided between a semiconductor laser 1 and a photodetector 7. Consequently, the variation of the optical output received by the photodetector 7 is the sum of the variation of the optical output accompanied with the temperature change of the semiconductor laser 1 and that due to the temperature change of absorption of the Farady element 4 for transmission of the Farady element 4 and is equal to the variation of the optical output coupled to an optical fiber 5. The variation of the optical output of the photodetector 7 is converted to an electric signal and is fed back to a power source 8 to adjust the current sent to the semiconductor 1, thereby keeping the optical output to the optical fiber 5 constant.

Kamata Osamu

Papers

Optical fiber type voltage sensor

Light emitting element and photo detector

Light signal propagator

Current measuring device

Semiconductor laser device with optical isolator