Abstract:
A digital camera includes a CCD imager, and a CCD output signal from the CCD imager is clamped in an analog clamp area by an analog clamp circuit, and then, converted into a digital signal by an A/D converter. The digital signal is thereafter applied to a clamp level calculation circuit which calculates a clamp level of the digital signal, whereby the digital signal can be subjected to digital clamping by a first subtraction circuit.
Abstract:
A quantum effect device which operates in a mesoscopic region and eliminates the need for making monochromatic electron waves for the operation and moreover can operate in a high temperature region. The quantum effect device comprises a first waveguide for connecting a first region and a second region, wherein carriers are injected into the first region and emitted from the second region, a second waveguide being branched off from the center of the first waveguide and connected to a third region, and a control region being formed in the branch part of the first and second waveguides for controlling a potential barrier. When the potential barrier is low, the control region emits carriers on the first waveguide from the second region and when the potential barrier is high, the control region leads carriers into the second waveguide from the first waveguide by quantum-mechanical reflection for emitting the carriers from the third region. The quantum effect device further includes a carrier injection region formed using a single potential barrier or resonant tunneling structure between the first region and the control region for speeding up the operation.
Abstract:
On the bottom face of a measurement section, measurement electrodes and a reference electrode are formed and a solution supply pipe is opened. Then, if a predetermined electrolytic solution is supplied from the solution supply pipe, the electrolytic solution can be held on an electrolytic solution holding surface on the lower end of the measurement section, utilizing the with surface tension thereof for providing a gas reception portion. Since the electrolytic solution is exposed directly to the air, substances in a vapor phase (particularly, odor substances) are diffused into the electrolytic solution, causing an electric state to change. The substances in the vapor phase can be detected by detecting the electric state change. The electrolytic solution held on the lower face of the measurement section can be updated by further supplying more electrolytic solution.
Abstract:
A videophone at e.g., a called location, receives sound signals, video signals and control signals through a communication circuit from a communication line and originating at, e.g., a calling videophone. A start signal detecting means, within the called videophone detects a storage start requesting signal from received control signals originating at a calling videophone. At the time of such detection, a coding circuit within the called videophone again encodes the video signals, that are received by the communication circuit and continuously decoded by a decoding circuit, and transmitted by the calling videophone but only by one frame therefrom and stores the frame into a storage circuit. After storing the one frame, a change-over circuit in the called videophone switches to the storage circuit to continuously store the subsequent incoming coded video and sound signals for eventual playback.
Abstract:
A distortion reducing circuit in an FM receiver comprises a distortion detector for receiving the output of an FM demodulating circuit. The distortion detector comprises a high pass filter, the output of which is applied to a capacitor so that the same is rapidly charged. The conduction of the transistor is changed as a function of the charge voltage across the capacitor and a high frequency component in the output of the FM demodulating circuit is reduced in association with the conduction of the transistor.
Abstract:
Provided are a light emitting module and a manufacturing method thereof, the light emitting module having improved heat radiation properties and improved adhesion between a sealing resin for sealing a light emitting element and other members. A light emitting module 10 includes: a metal substrate 12; a concave part 18 provided by partially denting an upper surface of the metal substrate 12; a light emitting element 20 accommodated in the concave part 18; and a sealing resin 32 covering the light emitting element 20. A convex part 11 is further provided on the upper surface of the metal substrate 40 in a region thereof surrounding the concave part 18. The sealing resin 32 is allowed to adhere to the convex part 11, thereby improving adhesion strength between the sealing resin 32 and the metal substrate 12.
Abstract:
An optical pickup device provides an ultraresolving prism between a semiconductor laser and an objective lens so as to reduce light intensity at around a cross sectional center of a laser beam, thereby generating ultraresolution thereon. An optical detector is disposed at a signal detecting position where the laser beam reflected by an optical disk is converged. The optical detector has a detecting element for receiving a main lobe and a pair of detecting elements for receiving a pair of side lobes. A peak of a shielding portion of the prism is inclined to a track center of the optical disk so that the side lobes are oppositely shifted from the track center. Thus, tracking error signals are obtained on the basis of detected signals in the side lobes.
Abstract:
A frequency control circuit of an FM modulator with a small number of external parts and a low number of IC pins, including a non-linear D/A converter, a current generator circuit and an emitter-coupled multivibrator. The non-linear D/A converter for giving an analog optimum resistance value depending on digital frequency control signals includes a plurality of resistors weighted by K.sup.n (1
Abstract:
A circuit for performing pre-mastered pit/pre-mastered groove discrimination on an optical disk while an optical pickup traces and traverses tracks. Output signals applied to the input terminal from light receiving elements are summed in an adder circuit and are then applied to first and second transistors. The output signal from the first transistor Is that obtained by envelope detecting the output signal of the adder circuit and is subtracted with the output signal of the second transistor in the subtracter circuit. Then the output signal of the subtracter is compared with a reference value Vref in a comparator circuit. The comparator's output signal according to the result of comparison Is applied to a retrigger monostable multivibrator, which generates an output signal according to the result of pre-mastered pit/pre-mastered groove discrimination. Thus a pre-mastered pit/pre-mastered groove discrimination can be performed with accuracy even while the light pickup traverses pre-mastered pits and pre-mastered grooves.
Abstract:
An image information processor for a liquid crystal display by a digital driver is intended to provide image display near to a source image by making continuous-tone image display by pseudo representations. The image information processor generates L-bit image display data based on P-bit source image data, L being less than P. Added to source image data of a picture element of the Nth frame (where N is a natural number of 2 or greater) is error data corresponding to the picture element of the (N-1)th frame at the same position as the picture element of the Nth frame. The high-order L bits of the P-bit data resulting from the addition are used as image display data of the picture element of the Nth frame and at least one bit of the remaining low-order bit data is held as error data of the picture element of the Nth frame. Thus, error data of a picture element of one frame is added to the same picture element of the next frame, thereby lessening the brightness difference between both the picture elements and smoothing a time change in brightness.