Seiko Epson Corporation

Seiko Espon Corporation

Ishikawajima-shibaura Machinery Co., Ltd.

Hiroshi Horiuchi

Hiroaki Jo

Toshiyuki Kasai

Daisuke Sato

Takeshi Nozawa

Takashi Kurumisawa

Kenji Mori

Yuichi Momose

Takeshi Ushikoshi

A detection device includes a heat sensing element, a detection circuit connected to a detection node of the heat sensing element, and a read circuit connected to a read node of the detection circuit, wherein the detection circuit includes a drive transistor whose gate is controlled by the detection node. In a program period the detection node is programmed to a voltage value corresponding to the threshold voltage of the drive transistor, and in a read period following the program period the read circuit reads the detection result of the detection circuit.

Detection device, sensor device, and electronic device

A data line driving circuit connected to data lines includes a bit shift unit that outputs input digital data composed of a plurality of bits for defining the brightness of pixels or bit-shifts the plurality of bits to lower levels to output them, based on a control signal, and a supply unit that supplies the output digital data of the bit shift unit to a D/A conversion unit. The D/A conversion unit supplies gray-scale signals obtained by D/A converting the output digital data of the supply unit to the data lines.

Data line driving circuit, electro-optical device, data line driving method, and electronic apparatus

An electro-optical device includes a plurality of pixel circuits each including a light-emitting element and a driving transistor for driving the light-emitting element; data lines that are connected to the plurality of pixel circuits and that supply data signals representing light-emitting gray-scale levels to the pixel circuits; and a data line driving circuit that supplies the data signals to the pixel circuits through the data lines. In addition, the data line driving circuit applies to each pixel circuit in a predetermined sequence a forward frame period supplying a data signal having a forward bias voltage for making the light-emitting element emit light and a backward frame period supplying a data signal having a backward bias voltage for making the light-emitting element not emit light, and drives each of the pixel circuits.

Electro-optical device, method of driving the same, and electronic apparatus

To provide an electro-optical device, a driving method therefor, and an electronic apparatus which can accurately control the brightness of electro-optical elements in accordance with the signal level of a data signal. A brightness detection circuitis provided which samples power-supply current Io every time one scan line is selected and which converts the power-supply current Io into a digital voltage signal DS having a digital value corresponding to the power-supply current Io. A light-emission-period control circuitgenerates light-emission-period control signals Hto Hn in accordance with a light-emission-period adjusting signal F corresponding to the digital voltage signal DS and outputs the light-emission-period control signals Hto Hn to corresponding control-signal supply lines Gto Gn. Further, light-emission-period control transistors of the pixelswhich are connected to the corresponding control-signal supply lines Gto Gn are on/off controlled, thereby controlling the light-emission period of the electro-optical elements.

Electro-optical device, driving method therefor, and electronic apparatus

To correct brightness by measuring with accuracy and high speed variation of the brightness between pixels of an organic EL display. A first correction data memory stores a first correction data Dhy in a row direction, and a second correction data memory stores second correction data Dhx in a column direction. A first operation circuit generates a pixel correction data DH based on the first correction data Dhy and the second correction data Dhx. The pixel correction data DH is stored into a pixel correction data memory. Input gray scale data Din is corrected by the pixel correction data DH to output as output gray scale data Dout.

Electro-optical device, driving circuit and driving method thereof, and electronic apparatus

To accurately display a predetermined gray level. A first transistor Tand a second transistor Tare arranged in a first pathfrom a power lineto a constant-current circuit. A driving transistor Tdr and a current supply transistor Tc are arranged in a second pathfrom the power lineto an OLED element. A capacitor Cconnected to the gate of the driving transistor and a capacitor Cconnected to the gate of the current supply transistor Tc hold a voltage corresponding to a data current Idata-j flowing in the first path. The driving transistor Tdr controls a driving current flowing in the second pathin accordance with the voltage held in the capacitor C. The current supply transistor Tc controls the driving current flowing in the second pathin accordance with the voltage held in the capacitor C

Pixel circuit, electro-optical device, and electronic apparatus

Aspects of the invention can provide an image processing circuit for gray scale correction, an image display apparatus, and an image processing method that allow reduction in the storage capacity needed for storing correction characteristics data without increasing clock rate in relation to interpolation processing of correction characteristics. A exemplary image processing circuit according to the invention can be applied, for example, to color correction or gamma correction of color image data. Gray scale correction characteristics data for a number of gray scale levels that is less than the number of gray scale levels of input image data can be stored in first and second lookup table storing units. Considering a gray scale value of a pixel that is being considered for gray scale correction processing as an input gray scale value, the first and second lookup-table storing units are referred to, obtaining an output gray scale value corresponding to the input gray scale value and an output gray scale value corresponding to an adjacent input gray scale value. An adjacent gray scale value refers to a gray scale value that is higher by one or lower by one than another input gray scale value. Then, output gray scale values between these two adjacent output gray scale values can be calculated by linear interpolation, obtaining output values for all input gray scale values. Subsequently, gray scale correction can be performed for each pixel of input image data, outputting corrected image data.

Image processing circuit, image display apparatus, and image processing method

A signal processing unit that generates data signals for controlling gray-scale levels of electro-optical elements includes a first D/A conversion unit that generates gray-scale signals from gray-scale data for designating the gray-scale levels of the electro-optical elements; a storage unit that stores correction data indicating correction values with respect to the gray-scale signals; a second D/A conversion unit that has resolution different from that of the first D/A conversion unit, and that generates correction signals from the correction data stored in the storage unit; and a synthesizing unit that synthesizes the gray-scale signals generated by the first D/A conversion unit with the correction signals generated by the second D/A conversion unit to generate the data signals.

Electro-optical device, method of driving the same, data line driving circuit, signal processing circuit, and electronic apparatus

To provide a method for manufacturing an electro-optical device that is capable of controlling more smoothly brightness as compared with a control in every one frame and preventing large current from flowing when switching frames in a peak brightness control, a method of driving the same, and an electronic apparatus. A grayscale data average value operation unitperforms, for each line, an average value calculation of grayscale levels of images corresponding to images of an one-frame-length and outputs, based on average value for the one frame-length, mode signals Mto Mfor brightness control in each line. A driver input data converterrewrites, based on the mode signals Mto Mfrom the grayscale data average value operation unit, grayscale data HD for one line among grayscale data from a frame memoryinto grayscale data DD. The driver input data converteroutputs grayscale data DD which is image data for the one frame-length and whose brightness is adjusted in a signal generating circuit.

Electro-optical device, method of driving the same and electronic apparatus

A data transfer control device and electronic equipment that make it possible to implement high-speed data transfer while observing restriction that prevent the traversing of page boundaries. A data transfer control device that conforms to the IEEE 1394 standard comprises a page table fetch circuit for fetching a page table from another node if a page table exists in a data buffer at the initiator, a page table creation circuit for creating a virtual page table if no page table exists, and an SBP-2 core for automatically dividing transfer data into a series of packets that do not traverse page boundaries based on the thus fetched or created page table and transmitting them. The page table creation circuit creates a page table in which a portion between a start address and a Kth page boundary is an X-type page table element, a portion between the Kth and Lth page boundaries is a Y-type page table element, and a portion between the Lth page boundary and an end address is a Z-type page table element.

Data transfer control device electronic equipment and method data transfer control

The objective of the present invention is to provide a data transfer control device and electronic equipment that guarantee stable operation even if a reset that clears the node topology information occurs. When a CPU (firmware) of a data transfer control device in accordance with the IEEE 1394 standard issues a data transfer start (or resume) command during a bus reset period, the execution of that command is canceled. The fact that the command has been canceled is informed to the CPU by an interrupt. The command is canceled by using a signal that is active during the bus reset period to mask a signal that goes active when a command is issued. When a pause command is issued, the transfer processing pauses at a previously determined pause location. Transfer data is automatically divided into a series of packets to be transferred continuously by the hardware. When a resume command and a pause command for transfer data have been issued together, the CPU executes the transfer processing in steps then pauses the transfer processing.

Data transfer control device and electronic equipment

A data transfer control device and electronic equipment that make it possible to implement high-speed data transfer with reduced overhead processing of firmware and smaller hardware. A data transfer control device that conforms to the IEEE 1394 standard comprises an arbitration circuit that permits firmware (FW) transfer after the completion of one transaction (or one packet transfer) in the continuous packet transfer, if the CPU issues an FW transfer start command during the execution of continuous hardware transfer (HW transfer) processing by a SBP-2 core. If HWStart and FWStart signals go active together, the FW transfer has priority. A header area in RAM is divided into an ordinary header area and an HW header area, and an address generation circuit switches between generating addresses for the ordinary header area and addresses for the HW header area, based on an HWDMARun signal from the arbitration circuit. A data area in RAM is divided into an ORB area and a stream area for the SBP-2 core.

A decompressor disposed to start an engine by a recoil starter and at this time compression pressure within a cylinder is adapted to escape therefrom, in which a decompression valve of the decompressor is disposed vertically with respect to a crank shaft or within a crank casing, so that a decompression valve does not laterally project from the cylinder and does not interfere with a cowling, whereby a compact engine is laid out, and also an interlocking mechanism of the decompression valve with the recoil starter becomes simple. Furthermore, a cam at the recoil reel is made variable correspondingly to the kind of engine so that the decompression timing during the starting is made variable so as to obtain the most suitable starting mechanism.

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Matsumoto, Japan

Hiroshi Horiuchi