Lapis Semiconductor Co., Ltd.

Oki Semiconductor Co., Ltd.

Nidec Tosok Corporation

Mitsubishi Denki Kabushiki Kaisha

Japan Aviation Electronics Industry, Limited

Lapis Technology Co., Ltd.

Nec Corporation

Kyb Corporation

Oki Electric Industry Co., Ltd.

Koji Higuchi

Atsushi Hirama

Hideaki Hasegawa

Kenichi Shiibayashi

Hiroshi Tsuchi

Yutaka Hashimoto

Osamu Hashiguchi

Yoshiyuki Kobayashi

Yoshinori Mizusawa

Koji Yamazaki

Manabu Nishimizu

Kunihiro Harayama

Takashi Shiono

Yoshiyuki Maki

Kohei Kubo

Hisashi Ishida

Tomoyuki Fujita

Seiya Matsuo

Shigehiro Kataoka

Hitoshi Sakamoto

Takashi Kuwahara

Hiroyoshi Ichikura

Koichiro Akatsuka

Yasuhiro Shirai

Masahiro Yamauchi

Takamitsu Eto

Takeshi Nosaka

Kunihiro Kajita

Yuushi Shutou

Shouji Umesato

Tomokazu Ikeda

Noriyo Sasaoka

Kazuhiro Honma

An output amplifier which includes a drive voltage generating unit that generates a positive drive voltage and a negative drive voltage corresponding to a difference between an input voltage and an output voltage, an output unit including a first transistor and a second transistor forming a complementary output between a positive power supply terminal and a negative power supply terminal, the first transistor flowing out the current from the positive power supply terminal to the output terminal corresponding to the positive drive voltage, and the second transistor flowing the current from the output terminal into the negative power supply terminal corresponding to the negative drive voltage, and clamp voltage generating circuits that apply a positive clamp voltage corresponding to the input voltage to the positive power supply terminal and apply a negative clamp voltage corresponding to the input voltage to the negative power supply terminal.

Output amplifier, source driver, and display apparatus

A display drive device includes a common voltage generating circuit that applies a voltage obtained by amplifying a reference common voltage to a common electrode as a common voltage, a reference gamma voltage generating circuit generating first to kth reference gamma voltages corresponding to predetermined gamma characteristics, a gamma compensation circuit receiving a voltage of the common electrode from the display panel and generating first to kth compensated reference gamma voltages obtained by adjusting voltage values of the first to kth reference gamma voltages based on a difference between the received voltage of the common electrode and the reference common voltage, and data drivers, each receives the first to kth compensated reference gamma voltages, generates grayscale voltages based on the first to kth compensated reference gamma voltages, selects a grayscale voltage corresponding to a brightness level indicated by a video signal, and supplies the grayscale voltage to each data line.

Display drive device, reference gamma voltage supply device, and display device

An electric oil pump includes a motor including a motor shaft, a pump assembly including a vane pump driven by the motor to suction and discharge oil, and an inverter to drive the motor. The motor includes a rotor, a stator on a side outward from the rotor in a radial direction, and a motor housing containing the rotor and the stator. The motor housing includes a suction port through which the vane pump suctions oil from outside, and a discharge port through which the vane pump discharges oil to outside. The motor housing includes flat surface portions in a portion of an outer periphery thereof. The suction port and the discharge port are located in a first surface of side surfaces which are the flat surface portions of the motor housing and are parallel or substantially parallel to the axial direction.

Electric oil pump

A display driver is provided. A designation of an output timing at each of first and koutput channels is received, and first and second delay pulse signals are generated at respective output timings of the first and the koutput channels. First to kfirst direction delay shift signals where a first delay pulse signal is present after a delay increased for each output channel from the first toward the koutput channel are generated. First to ksecond direction delay shift signals where a second delay pulse signal is present after the delay increased for each output channel from the ktoward the first output channel are generated. One whose timing at which a delay pulse signal is present is earlier is selected from each of the direction delay shift signals corresponding to the same output channel, and set as first to koutput timing signals.

Display driver adjusting output timings of driving voltages at output channels

The present invention includes a common voltage generation part, a reference gamma voltage generation part, a gamma compensation part, a gradation voltage generating circuit, and a DA conversion part. The common voltage generation part generates a common voltage by amplifying a reference common voltage and applies the common voltage to a common electrode of a display panel. The reference gamma voltage generation part generates reference gamma voltages. The gamma compensation part takes in a voltage of the common electrode as a feedback common voltage from the display panel and generates compensation reference gamma voltages in which voltage values of the respective reference gamma voltages are adjusted on the basis of a difference between the feedback common voltage and the reference common voltage. The gradation voltage generating circuit generates gradation voltages on the basis of the compensation reference gamma voltages. The DA conversion part selects a gradation voltage corresponding to a display data piece from the gradation voltages.

Display driver and display device having variable refresh rate synchronization function suppressing flicker occurrence

A display device and data driver are provided. The display device includes a plurality of data drivers provided for a predetermined number of data lines in a plurality of data lines. The plurality of data drivers receive the serialized video data signal from the display controller, generate a modulated data timing signal whose period changes within the one frame period, and supply a gradation voltage signal to each of the predetermined number of data lines for each of data periods based on a data timing of the modulated data timing signal, each of data periods corresponding to the data timing of the modulated data timing signal.

Display device and data driver

An electric pump provided with a pump unit configured to discharge working oil by being rotationally driven by an electric motor includes: a drive shaft configured to transmit rotational driving force from the electric motor to a rotor of the pump unit; a rotation-detection shaft provided coaxially with the drive shaft, the rotation-detection shaft being configured to be rotated together with the rotor; and a rotation detector unit configured to detect rotation of the rotation-detection shaft. The rotation-detection shaft has: an engagement portion configured to engage with the rotor; and a detection-target portion facing the rotation detector unit, and an outer diameter of the detection-target portion is set so as to be larger than an outer diameter of the engagement portion.

Electric pump

An electric pump device includes a motor having a rotor and a stator portions, a pump portion and a housing. The stator portion has a stator core, and coils each having a winding portion and a crossover portion. The housing has a housing body portion having a tubular shape and extending in the axial direction, and a flange portion expanding radially outward from the outer peripheral surface of the housing body portion. The flange portion has an end surface that faces toward one side in the axial direction and is disposed in the axial direction between a first and a second virtual plane. The first and the second virtual planes pass through parts of the stator core, the winding portion, and the crossover portion located respectively closest to one and the other sides in the axial direction and expanding in a direction perpendicular to a central axis.

Electric pump device and attachment structure of electric pump device

A control device is provided for controlling a rotation speed of an electric oil pump, including a motor and a pump mechanism connected to the motor, based on a command value input from a host device. The control device includes: a first calculator calculating a first duty value of current to be output to the motor based on a deviation between the command value and a rotation speed of the motor; a second calculator calculating a second duty value of current to be output to the motor based on a deviation between a current limit value of the motor and a current value of the motor; and a drive current determiner comparing the first duty value calculated by the first calculator and the second duty value calculated by the second calculator, and selecting the lower duty value as a duty value of current that drives the motor.

Control device of electric oil pump and electric oil pump

The pump device includes a motor portion that includes a shaft rotating about a central axis and a pump portion that is driven by a motor portion via the shaft. The pump portion includes a pump rotor that rotates along with the shaft and a pump housing that includes an accommodation portion that accommodates the pump rotor. The pump housing includes a pump body that includes a first bearing portion that supports the shaft and a pump cover with an accommodation portion disposed between the pump cover and the pump body. The pump cover includes a flow path through which oil is discharged and suctioned, and includes a second bearing portion that rotatably supports the shaft and that communicates with the flow path. An end portion of the shaft on one side in the axial direction is disposed at the second bearing portion or inside the flow path.

Pump device

Display device and data driver for display device

A display device includes a display panel, a gate driver that supplies scan signals to a first to nth scan lines, a data driver that supplies gradation voltage signals corresponding to a video data signal to a plurality of data lines, and a display controller that supplies the video data signal to the data driver. The display controller supplies a first to nth pieces of display data to the data driver in units of display data pairs each including a kth piece of display data and an (n+1&#x2212;k)th piece of display data. The gate driver supplies the scan signals to the plurality of scan lines. Each of the scan signals has different pulse widths depending on distance from the data driver to the respective first to nth scan lines. The data driver supplies the gradation voltage signals to the plurality of data lines on the basis of supply of the display data pairs from the display controller.

Display device and display controller

An electric oil pump apparatus includes an electric oil pump including a housing main body that accommodates a motor and a pump driven by the motor, a flange portion formed on the housing main body, and a control circuit case for accommodating a control circuit, and a base plate attached to the electric oil pump. The base plate includes an annular main body fixed to the housing main body, and a sealing member located between the annular main body and the housing main body. The annular main body includes a first surface located on one side, a second surface located on the other side, a first through hole for passing the housing main body therethrough, and an annular stepped portion configured to accommodate the sealing member, and formed along an inner edge of the first through hole. The first surface of the base plate is opposed to the flange portion.

Electric oil pump apparatus and base plate for electric oil pump

An output circuit includes a differential amplifier including an inverting input terminal, non-inverting input terminals and an output terminal, and outputs, from the output terminal, a voltage having a level corresponding to a weighted average of respective input voltage levels of the non-inverting input terminals, when the output voltage level is equal to a input voltage level of the inverting input terminal, and outputs a voltage having a level corresponding to a difference between a level corresponding to a weighted average of the respective input voltage levels of the non-inverting input terminals and the input voltage level, when which the output voltage level is different from the input voltage level; and a delay circuit that generates a delay voltage responding with a predetermined time constant with respect to a change in the output voltage level and supplies the delay voltage to the inverting input terminal.

Output circuit, data line driver, and display device

A display device driver includes: a pixel drive voltage application unit; and a delay controller. The pixel drive voltage application unit converts a plurality of pixel data pieces into a plurality of pixel drive voltages, the pixel data pieces respectively representing luminance levels of respective pixels based on a video signal, the pixel drive voltages respectively having voltage values corresponding to the luminance levels, and applies the converted pixel drive voltages to the display device. The delay controller controls the pixel drive voltage application unit to apply the plurality of pixel drive voltages to the display device, the plurality of pixel drive voltages being sequentially delayed in units of groups, the groups each including t pixel drive voltages, and sets delay time designated by delay time designation signals as delay time to delay each of the pixel drive voltages.

Display device driver having pixel drive voltage delay selection

Growing community of inventors

Yokohama, Japan

Koji Higuchi