Seiko Epson Corporation

Seiko Epson Cpropration

Tsuyoshi Tamura

Takeshi Nomura

Robina Atsuchi

Toshiki Miyane

Teruhisa Ishikawa

Hitoshi Ota

Hisanobu Ishiyama

Noboru Itomi

Kazuo Nishizawa

Shinichi Iwata

Norio Koizumi

Atsushi Ishikawa

Zenzo Oda

Hiroaki Nomizo

Masaoki Sagara

In a first operation, in a tournament circuit, any one row of data lines is selected according to a selection signal, and a voltage of the selected data line is output to a test output terminal via an amplifier. In a second operation, a selection circuit in a first layer in the tournament circuit is in an off state between all the data lines and an input end of a selection circuit in a second layer.

Drive circuit of electro-optical device, electro-optical device, and electronic apparatus

In an electro-optical device, pixel circuits are provided corresponding to an intersection between a scanning line in an i-th row and a data line in a k-th column in a display region, and an intersection between a scanning line and data line. The pixel circuit is brought into an optical state in accordance with a voltage of a data line when a scanning line is selected. In an odd frame period, in the i-th row selection period and the (i+1)-th row, a data signal of a voltage corresponding to the i-th row and k-th column of data of the top image is output, and in an even frame period, in the i-th row selection period and the (i+1)-th row, a data signal of a voltage corresponding to the (i+1)-th row and the k-th column of data of the bottom image is output.

Electro-optical device and electronic apparatus

An optical module includes a first electro-optical device including a first pixel, a second electro-optical device including a second pixel and a third pixel, and a prism. An area of the second pixel is larger than an area of the first pixel, and an area of the third pixel is smaller than the area of the second pixel. A width of the third pixel in a direction corresponding to a first direction in a synthesized image is not less than 0.5 times and less than 1 time a width of the first pixel in the direction corresponding to the first direction, and a width of the third pixel in a direction corresponding to a second direction in the synthesized image is 0.5 times or more and less than 1 time a width of the first pixel in the direction corresponding to the second direction.

Optical module and image display device

In a display device, first to second data lines, first to second data transfer lines, first to fourth capacitance elements, a power supply line to which a fixed voltage is supplied, a first switch provided between the first data transfer line and the second capacitance element, a second switch provided between the power supply line and the second capacitance element, a third switch provided between the second data transfer line and the fourth capacitance element, a fourth switch provided between the power supply line and the fourth capacitance element, a first power supply supplying the fixed voltage to one end of the power supply line, and a second power supply supplying the fixed voltage to another end of the power supply line.

Display device and electronic apparatus

An electro-optical device includes one unit circuit provided corresponding to an intersection between one scanning line and one data line, another unit circuit provided corresponding to an intersection between the one scanning line and another data line or an intersection between another scanning line and the one data line or an intersection between another scanning line and another data line, and an electro-optical element configured to be driven by using the one unit circuit or the another unit circuit.

A display device includes a pixel circuit, a drive circuit that drives a data line connected to the pixel circuit, and a capacitor that is provided between an output node of the drive circuit and the data line. The drive circuit outputs a constant current to the output node during a driving period of which a length is set according to display data.

A display apparatus includes a pixel circuit array, a scanner-drive type drive circuit configured to sequentially drive each of blocks of data line groups in the pixel circuit array, and a control circuit configured to control the drive circuit. The control circuit receives determination information for determining whether or not a display line corresponding to display data is a black display line. Based on the determination information, the control circuit sets amplifier circuits included in the drive circuit to an operation off state or a low power consumption state during a period in which the black display line is driven.

Display apparatus and electronic apparatus

An electro-optical device includes a display unit provided with a first pixel circuit connected to a first data line, a second pixel circuit connected to a second data line, a third pixel circuit connected to a third data line, and a fourth pixel circuit connected to a fourth data line, a first data line driving circuit configured to supply a gradation signal to the first data line and the second data line, and a second data line driving circuit configured to supply a gradation signal to the third data line and the fourth data line. The first data line driving circuit and the second data line driving circuit are arranged to sandwich the display unit in a wiring direction of the first data line. A layout of the first data line driving circuit and a layout of the second data line driving circuit are in line symmetry.

A drive circuit of a display device includes a plurality of latch circuits that latch grayscale data for each block, a plurality of conversion circuits that convert grayscale data latched in a plurality of latch circuits into a plurality of analog grayscale signals, a plurality of transmission paths that transmit the plurality of analog grayscale signals, a selection circuit that generates a plurality of selection signals for selecting data lines in one block in sequence out of the plurality of data lines, and an output circuit connected between a plurality of transmission paths and the data lines in each block and that outputs the plurality of analog grayscale signals to the data lines in one block selected in sequence by the plurality of selection signals.

A display device includes a plurality of latch circuits which latch gradation data that is used to drive a plurality of data lines, a plurality of D/A converters which convert gradation data that is latched to the plurality of latch circuits to a plurality of analog signals, a plurality of amplifiers which generate a plurality of gradation signals by respectively amplifying the plurality of analog signals output from the plurality of D/A converters, and an analysis circuit that analyzes gradation data that is latched to the plurality of latch circuits and reduces direct current that flows in at least one amplifier or at least one D/A converter according to an analysis result.

Display device and electronic apparatus having analysis circuit analyzing gradation data

A power supply circuit includes: a regulator configured to receive a first power supply voltage and a third power supply voltage higher than the first power supply voltage and output a regulated voltage between the first power supply voltage and the third power supply voltage based on the third power supply voltage; and an output control circuit configured to select the first power supply voltage or the regulated voltage to output as a second power supply voltage. The output control circuit outputs the first power supply voltage as the second power supply voltage when the third power supply voltage is lower than a threshold voltage, whereas the output control circuit outputs the regulated voltage as the second power supply voltage when the third power supply voltage is higher than or equal to the threshold voltage.

Power supply circuit, circuit device, display device, and electronic apparatus

An electro-optic device includes a voltage selection circuit configured to select a higher electric potential side voltage and a lower electric potential side voltage that correspond to upper bits of data, a first output circuit configured to output a first output voltage corresponding to lower bits of data to a data line, a second output circuit having a driving capability higher than that of the first output circuit and configured to output a second output voltage corresponding to upper bits of data among the lower bits of data to the data line, and a control circuit configured to allow the first output circuit and the second output circuit to be driven during a first period, and configured to bring an output of the second output circuit into an OFF state or an almost OFF state during a second period.

Image display device having voltage selection circuit

A plurality of pixel circuits provided in a display apparatus respectively include light-emitting elements OLED, first transistors that supply driving currents to the light-emitting elements, second transistors that turn on and off connection between data lines and gates of the first transistors, and third transistors. The display apparatus has first holding capacitors that are spectively inserted and connected midway on the plurality of data lines and shift levels of driving voltages of the first transistors, and holding capacitors that respectively hold potentials of the plurality of data lines. N first holding capacitors are arranged in a column direction Y, each of the first holding capacitors having an electrode width that is smaller than a width of N pixel circuits arranged adjacent to each other in a row direction X, and that is equal to or larger than a width of one pixel circuit.

Display apparatus and electronic equipment

A plurality of pixel circuits provided in a display apparatus respectively include light-emitting elements OLED, first transistors that supply driving currents to the light-emitting elements, second transistors that turn on and off connection between data lines and gates of the first transistors, and third transistors. The display apparatus has first holding capacitors that are respectively inserted and connected midway on the plurality of data lines and shift levels of driving voltages of the first transistors, and holding capacitors that respectively hold potentials of the plurality of data lines. N first holding capacitors are arranged in a column direction Y, each of the first holding capacitors having an electrode width that is smaller than a width of N pixel circuits arranged adjacent to each other in a row direction X, and that is equal to or larger than a width of one pixel circuit.

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Hara-mura, Japan

Tsuyoshi Tamura