Jvc Kenwood Corporation

Takayuki Iwasa

Shunsuke Izawa

Hiroyuki Kawanaka

Hirotomo Itou

A semiconductor wafer includes: a rectangular circuit formation region provided on the semiconductor wafer; an electronic circuit formed in the circuit formation region; a first seal ring formed along each of four outer peripheral parts of the circuit formation region so as to surround an outer periphery of the circuit formation region; and a second seal ring formed, in parallel with the first seal ring, on outer peripheral parts other than at least one outer peripheral part out of the four outer peripheral parts of the circuit formation region.

Semiconductor wafer and method of manufacturing semiconductor chip

Each of multiple pixels of a spatial light modulator of an optical node device includes: a first switching circuit and a first signal holding circuit that sample and hold normal gradation data or inverted gradation data; and a second switching circuit and a second signal holding circuit that sample the normal or inverted gradation data held in the first signal holding circuit at a common timing to the multiple pixels, hold the normal or inverted gradation data for one subframe period, and apply the normal or inverted gradation data to a reflective electrode. The spatial light modulator drive unit applies alternating current voltage having positive polarity and a negative polarity to liquid crystal by inverting voltage in a common electrode of a liquid crystal display element and supplies a voltage having an amplitude different from an amplitude between the normal and inverted gradation data to the common electrode.

Optical node device

According to one embodiment, a reflective liquid crystal display apparatus includes a plurality of pixels and a temperature sensor. Further, the temperature sensor included in the reflective liquid crystal display apparatus is formed in one or more regions among a plurality of pixel regions partitioned into rows and columns. The reflective liquid crystal display apparatus can thereby measure the temperature of the pixels more accurately at real time compared with the case of using a temperature sensor attached onto a heatsink.

Reflective liquid crystal display apparatus including pixels and temperature sensor

A liquid crystal display apparatus includes a shift register unit that sequentially takes in a video signal including s-bit width for the number of columns of a plurality of pixels, a 1-line latch unit that concurrently outputs a plurality of the video signals taken by the shift register unit, comparator units that convert the plurality of video signals output from the 1-line latch unit into a plurality of analog voltages, respectively, and an analog switch unit that switches whether or not the plurality of analog voltages are supplied to the plurality of data lines, respectively.

Liquid crystal display apparatus and method of manufacturing the same

According to an embodiment, a liquid crystal display apparatus includes a plurality of sense amplifiers for amplifying respective potential differences between a plurality of positive-polarity pixel drive voltages read out from a plurality of pixels of a row to be inspected to a plurality of first data lines and a plurality of negative-polarity pixel drive voltages read out from the plurality of pixels of the row to be inspected to a plurality of second data lines, each of the pixels including a switch transistor for switching whether a positive-polarity pixel drive voltage applied to a pixel drive electrode is output to a corresponding first data line, and a switch transistor for switching whether a negative-polarity pixel drive voltage applied to the pixel drive electrode is supplied to a corresponding second data line.

Liquid crystal display device and method for inspecting pixels thereof

According to an embodiment, a liquid crystal display device includes a plurality of pixels and a control circuit, each of the pixels includes a first switch, a second switch, a first storage unit, a second storage unit, a liquid crystal display element, and a control circuit, and the control circuit is configured to simultaneously overwrite the subframe data held in the first storage unit provided in each of the plurality of pixels with fixed data, and to simultaneously transfer the fixed data held in the first storage unit to the second storage unit by turning on the second switch provided in each of the plurality of pixels.

Liquid crystal display device and driving method therefor

A liquid crystal display apparatus includes a plurality of sense amplifiers configured to amplify respective potential differences between a plurality of positive-polarity pixel drive voltages read out from a plurality of pixels of a row to be inspected to a plurality of positive-polarity data lines and a plurality of negative-polarity pixel drive voltages read out from a plurality of pixels of a row to be inspected to a plurality of negative-polarity data lines, in which each of the pixels includes a first switch transistor configured to switch whether or not to output a positive-polarity pixel drive voltage before it is applied to a pixel drive electrode to a corresponding positive-polarity data line and a second switch transistor configured to switch whether or not to supply a negative-polarity pixel drive voltage before it is applied to the pixel drive electrode to a corresponding negative-polarity data line.

Liquid crystal device, wavelength selection optical switch apparatus, and pixel inspection method of liquid crystal device

A liquid crystal display apparatus includes a plurality of pixels that form a plurality of pixel pairs, each of the pixel pairs being adjacent two pixels in one column, in which, in each of the pixel pairs, a first switch transistor that switches whether or not to output a voltage of a video signal written into one of the pixels to a corresponding data line and a second switch transistor that switches whether or not to output a voltage of a video signal written into the other one of the pixels to a corresponding data line are composed in such a way that they are controlled to be turned on or off by a common switch selection signal for reading.

According to one embodiment, each pixel of a liquid crystal display device includes: a switch configured to sample subframe data; a storage unit configured to hold the subframe data sampled by the switch, the storage unit and the switch constituting an SRAM cell; and a conductive switch disposed between a liquid crystal display element and an adjacent pixel. A range of a source voltage of NMOS and PMOS transistors constituting each inverter constituting the storage unit of one pixel is configured to be able to be set separately from a range of a source voltage of NMOS and PMOS transistors constituting each inverter constituting the storage unit of another pixel.

Liquid crystal display device and pixel inspection method therefor

Provided is a liquid crystal display device that includes pixels and a pixel control unit. Each pixel individually includes: a display element; a first switching unit configured to sample subframe data; a first signal holding unit configured to form a static random access memory to store the subframe data; a second switching unit configured to output the subframe data stored; and a second signal holding unit configured to form a dynamic random access memory to apply output data to the pixel electrode. The pixel control unit performs, for individual subframes, operations of: after writing into all of the plurality of pixels by repeatedly writing the subframe data to the first signal holding unit for the individual pixels in units of rows; turning on the second switching units; and rewriting stored content in the second signal holding units with the subframe data stored in the first signal holding unit.

Liquid crystal display device

Provided is a liquid crystal display device that includes: pixels, a pixel control unit, and a common voltage generation unit. The pixel includes: a display element; a first switching unit configured to sample each frame data; a first holding unit configured to form an SRAM, and to hold sub-frame data sampled; a second switching unit configured to output the sub-frame data; and a second holding unit configured to form a DRAM, and configured of which stored content is rewritten by the sub-frame data. The pixel control unit is configured to repeat writing the sub-frame data into the first holding units, and to operate to rewrite the stored content in the second holding units. The common voltage generation unit is configured to change a voltage value of a common voltage from a first voltage value to a second voltage value determined based on at least the one frame period.

A liquid crystal display includes a pixel circuit having a first hold unit, a second hold unit, a transfer control unit and a pixel unit. The first hold unit selectively holds a higher or lower driving voltage which is arbitrarily set between a ground potential and a power-supply voltage, according to a row selection signal from a vertical scanning unit and a logical value of data from a horizontal scanning unit. The second hold unit selectively holds the higher or lower driving voltage held in the first hold unit. The transfer control unit transfers to the second hold unit, the higher or lower driving voltage held in the first hold unit according to a trigger pulse. The pixel unit drives a liquid crystal according to a potential difference between the higher or lower driving voltage held in the second hold unit and a voltage supplied to a common electrode thereof.

Liquid crystal display

A LCD device includes pixels formed of column data lines and row scanning lines. The pixel includes a display element; a first switching unit that performs sampling on each frame data of an input video signal; a first holding unit that configures an SRAM, and holds sub frame data; a second switching unit that causes the sub frame data held in the first holding unit; and a second holding unit that configures a DRAM, and applies output data to the pixel electrode, a pixel control unit that performs an operation of repeating writing the sub frame data in the first holding unit, turning on the second switching units, and rewriting memory content of the second holding units; and a timing control unit. A delay of a certain period of time is sequentially given to a timing at which the pixel control unit turns on the second switching unit.

Liquid crystal display (LCD) device

A liquid crystal display device includes an inspection control unit configured to alternately perform a first inspection operation in which an inspection signal is input from a first column data line connected to one pixel of the two pixels in each of the pairs into the one pixel and is read out to a second column data line connected to another pixel through the other pixel of the two pixels in each of the pairs and a second inspection operation in which an inspection signal is input from the second column data line into the other pixel and is read out to the first column data line through the one pixel, on all of the plurality of pixels in a unit of pixels in each row when the pixels being inspected.

Growing community of inventors

Yokohama, Japan

Takayuki Iwasa