32results about How to "Simple timing control" patented technology

An image forming apparatus, includes: a latent image carrier that moves in a moving direction; and an exposure head that includes a light emitting element which emits a light and an imaging optical system which images the light emitted from the light emitting element, and is adapted to form a spot on the latent image carrier, wherein a pitch in the moving direction of the latent image carrier between the spots formed by the different imaging optical systems is an integral multiple of a pixel pitch in the moving direction of the latent image carrier.

An embodiment of the invention discloses a calibration method for a capacitor mismatch error of a pipeline ADC (analog to digital converter). On the basis of the calibration-free structure of the traditional pipeline ADC, a calibration level with the capacitor mismatch error required to be calibrated is composed of a level MDAC (multiplying digital to analog converter) structure and a level-calibrated switch structure, and meanwhile, a capacitor mismatch error digital calibration circuit is added. During the calibration-level capacitor error extracting period, two special inputs are supported by the level-calibrated switch structure to a calibration-level sampling capacitor to obtain two digital codes containing the capacitor mismatch errors, and accordingly digital calibration is performed by extracting the calibration-level capacitor mismatch error. The calibration method is simple in structure, fewer additional elements are required, sequential control is easy, and the problem that poor static characteristics, caused by capacitor mismatch, is calibrated is solved.

The invention discloses a passive wireless multi-parameter sensor system and a multi-parameter measurement method of the passive wireless multi-parameter sensor system. Multi-parameter measurement and signal transmission are achieved according to the time-division multiplexing technology. The system comprises a primary system and a subsystem. A signal transmitted by the primary system serves as a modulation carrier and also provides energy for the subsystem. The subsystem receives the signal transmitted by the primary system, and the signal is subject to circuit rectification and voltage stabilization and then provides energy for the subsystem. The subsystem comprises a plurality of capacitance-type sensors sensing changes of system-environment physical quantities. Capacitance signals of the sensors are converted into frequency signals through a C-F conversion circuit; then switching-on and switching-off of a load switch are controlled by multi-path frequency signals through one transmission channel according to the time-division multiplexing technology, and load modulation of a circuit is completed by changing the load impedance of the subsystem. Modulated signals are received by the primary system through inductive coupling to carry out demodulation and amplifying processing. Due to the adoption of the system, the number of measured parameters can be conveniently increased, and it is only required that the number of frequency dividers is increased and the state switching ability of a multiple-way switch is improved.

The invention provides a sensitive amplifier, and discloses a high-speed current sensitivity amplifier applied to a static random access memory circuit. The high-speed current sensitivity amplifier at least comprises a current isolation circuit, a current amplification circuit, a voltage reduction circuit, a latch circuit and an offset circuit, wherein the current isolation circuit is used for isolating input signals from output signals; the current amplification circuit is connected with the current isolation circuit and is used for amplifying input current and used for outputting corresponding voltage signals; the voltage reduction circuit is connected with the current amplification circuit and is used for reducing voltage of signals output from the current amplification circuit; the latch circuit is connected with the voltage reduction circuit and is used for latching signals outputted from the voltage reduction circuit; the offset circuit is connected with the latch circuit and is used for providing offset for the latch circuit. The high-speed current sensitivity amplifier is not only simple in time-sequence control, but also applicable to design of a static random access memory circuit, and particularly applicable to high-speed design, and the reading time of the sensitive amplifier can be effectively shortened; in addition, based on an SOI CMOS process of 0.13 micrometer, the simulation result shows that it takes 51pS to output voltage high-level of 70%VDD by the sensitive amplifier.

The invention discloses a test circuit and method for testing the on-off characteristics of a converter valve. In the test circuit, the positive electrode of a DC power supply in an energy supplementloop is connected to the anode of a first thyristor; one end of a recovery valve in a recovery loop is connected to one end of an inductor and the cathode of the first thyristor, and the other end ofthe recovery valve is connected to the negative electrode of the DC power supply; one end of an H-bridge circuit in an output loop is connected to the other end of the inductor, the other end of the H-bridge circuit is connected to the negative electrode of the DC power supply, the H-bridge circuit comprises a first sub-module comprising a first capacitor and a first switch assembly and a second sub-module comprising a second capacitor and a second switch assembly, and the capacitance of the first capacitor is different from that of the second capacitor; a load loop comprises a to-be-tested valve test object, which is connected to two ends of the H-bridge circuit. By implementing the invention, a test platform which can be periodically operated and of which the turn-on voltage is differentfrom the turn-off voltage is built, and the on-off characteristics of the valve and the electrical performance of internal parts can be tested in a targeted manner.

The invention provides a display panel and a preparation method thereof. The display panel comprises a first substrate and a plurality of LED chips; the first substrate is provided with a plurality ofthin film transistor units; the plurality of LED chips are distributed on the first substrate in an array; each thin film transistor unit is correspondingly connected with and controls one LED chip.According to the display panel and the preparation method thereof, the array circuit is prepared on the glass substrate, so that each LED chip can be independently controlled; such kind of control mode can adjust and control display image quality more accurately, and an image quality improvement effect is more obvious. According to a gray scale driving mode, field frequency modulation driving is adopted, sequential control is simpler, dependence on liquid crystal response speed is reduced, and color cast caused by direct current driving is avoided. In the manufacturing process of the display substrate, voltage drop caused by circuit impedance is reduced by adding a high-conductivity metal wire on a power line, so that poor display is avoided. A nano-silver paste technology is adopted to solve the problem of chip bonding caused by a non-copper manufacturing process, and the manufacturing yield of the display panel is improved.

A circuit structure and method for enhancing motion picture quality are provided. This circuit comprises a frame memory and two dual-port buffers. The memory structure can read the previous frame data and store the present frame data at the same time. Therefore, it can provide a simpler access control and structure of memory than the prior art. The circuit compresses the data by a nonlinear quantization method, which can reduce the size of the frame memory. The circuit uses alternate reading/writing and interpolation by using the adjacent pixels to further reduce the size of the frame memory.

The embodiment of the invention discloses a camera control method and system and electronic equipment. According to the technical scheme provided by the embodiment of the invention, the lifting of the camera can be associated with the outflow state of the camera, a native interface of an operating system does not need to be called to control the lifting of a motor, and an application does not need to additionally add logic for calling the motor, so that modules called by the lifting control of the camera are fewer, and time sequence control is simpler. In addition, redundancy control logic after the camera is turned off is added, and the problem that the camera rises and falls repeatedly when multiple applications are switched and used can be avoided.

The present invention discloses a microwave-enabled atom back pumping-based detection system and method applied to an atom interferometer. The detection system comprises a laser light source, a microwave frequency source, a detection optical path, an atomic imaging device and a time sequence control module; after being interfered, falling atoms are in an a quantum state and a b quantum state, and interact with a beam of detection light which is horizontally located at an upper part in space, so as to generate fluorescent light; the number information Nb of the b-quantum state atoms is obtained through an imaging system; in a continuous falling process, the quantum-state atoms are removed from a detection region; before entering a beam of detection light which is horizontally located at a low part in space, another kind of a-quantum state atoms are back pumped to a b-quantum state through a microwave back pumping method, wherein the b-quantum state can interact with the detection light; and after remaining atomic groups pass through the lower detection light beam and generate fluorescent light, the number information Na of the a-quantum state atoms is obtained. The optical path structure of the detection system of the invention is simple and compact; the frequencies of the upper laser beam and lower laser beam are identical; the intensity of background light is constant; a microwave source can be turned on and turned off quickly; and the detection system has high practicability.

A exposure head includes: a light-emitting element substrate including a first light-emitting element configured to emit light, a second light-emitting element disposed in a first direction of the first light-emitting element, a third light-emitting element, and a fourth light-emitting element disposed so as to satisfy the following relationship; Dr12:Dr23=1:m (l≠m) where, l: positive integer number, m: positive integer number, Dr12: distance between the first light-emitting element and the third light-emitting element in the direction orthogonal to the first direction, Dr23: distance between the third light-emitting element and the fourth light-emitting element in the direction orthogonal to the first direction, and an imaging optical system configured to image lights emitted from the first light-emitting element, the second light-emitting element, the third light-emitting element, and the fourth light-emitting element.