Panasonic Liquid Crystal Display Co., Ltd.

Hitachi Displays, Ltd.

Hitachi, Ltd.

Japan Display Inc.

Hitachi Device Engineering Co., Ltd.

Other

Renesas Technology Corp.

Yoshihisa Ooishi

Junichi Maruyama

Kikuo Ono

Goki Toshima

Hideyuki Nakanishi

Hiroyuki Nitta

Genshiro Kawachi

Shinji Yasukawa

Kenta Endo

Takashi Shoji

Misa Owa

Tsutomu Furuhashi

Hiroshi Watanabe

Toshikazu Koudo

Toshimitsu Watanabe

Kazuo Kita

Hidetoshi Kida

Takeshi Maeda

Nobuaki Kabuto

Ryutaro Oke

Mitsuo Nakajima

Masato Ishii

Mutsumi Suzuki

Yoshihiro Imajo

Ikuko Mori

Toshiki Onishi

Junichi Ikoma

Sachiko Yamazaki

Shisei Katou

Hideyuki Noguchi

Yoshiaki Nakayoshi

Naoki Takada

Hiroshi Kurihara

Naruhiko Kasai

Norio Mamba

Daisuke Kajita

Masaaki Kitajima

Takahiro Kobayashi

Satoru Tsunekawa

Yoshiki Kurokawa

Masahiko Suzuki

Koji Hosogi

Yoshio Umeda

Fumio Haruna

Kazuyoshi Kawabe

Hirobumi Koshi

Kenichi Ono

Akihiro Watanabe

Tomohide Ohira

Junichi Satoh

Masahiro Fukata

Takayuki Tajiri

Kuniaki Amano

Hideki Abe

Atsuhiko Higa

A display device includes data lines extending in a first direction, gate lines extending in a second direction, a source driver that supplies a data signal to the data lines, a gate driver that supplies a gate signal to the gate lines, and a timing controller that determines scan order of the gate lines and outputs image data to the source driver based on the scan order. The timing controller determines the scan order of the gate lines based on an input image corresponding to input image data input from an outside, and switches first scan order and second scan order in each frame, the first scan order and the second scan order being different from each other in the scan order.

Liquid crystal display device and method of driving the same

A liquid crystal display device that performs phase inversion drive in which a phase of a polarity of a data voltage is inverted in predetermined timing while performing frame inversion drive in which a positive-polarity data voltage and a negative-polarity data voltage are alternately output to a data line in each one or plurality of frames. In a first frame immediately after the phase is inverted, the source driver outputs a second data voltage to the data line in initial first periods of a horizontal scanning period, the second data voltage being closer to the common voltage than a first data voltage corresponding to input image data, and outputs the first data voltage to the data line in a second period after the first period in the horizontal scanning period.

Liquid crystal display device

A display apparatus includes an image display region having pixels sectioned by scanning signal lines and video signal lines, scanning connecting lines, thin film transistors, selection signal lines connected to gate electrodes of the thin film transistors, plural ones of the thin film transistors connected to different ones of the scanning connecting lines being connected to one of the selection signal lines; and a scanning signal drive circuit. The scanning signal drive circuit performs a normal scanning mode in which pulse signals are supplied in turn to plural ones of the scanning connecting lines connected to the one of the selection signal lines, and in the normal scanning mode, a fall timing of the gate-on voltage differs from a fall timing of a last one of the pulse signals supplied to the plural ones of the scanning connecting lines during the selection period.

Display device having a rise timing of a gate-on voltage that differs from a rise timing of a first pulse signal

A display device comprises: data lines extending in a first direction; gate lines extending in a second direction, and being divided into groups each of which has the gate lines adjacent in the first direction; selection signal supplying wirings each of which is provided in each group, and connected to each control electrode of the selector transistors corresponding to the group; gate voltage supplying wirings connected to the other conductive electrode of each of the selector transistors corresponding to the group; and wherein a gate driver supplies a second gate voltage having a voltage level lower than that of a first gate voltage to at least one of the gate voltage supplying wirings in each of the groups before supplying the first gate voltage in order to turn on a pixel transistor disposed in an intersection portion of the data line and the gate line.

Display device and drive method of the display device

Display device having a fall timing of a gate-on voltage that differs from a fall timing of a last pulse signal

A display device includes an image display area that includes pixels sectioned by scanning signal lines and video signal lines, first scanning connection lines connected to scanning signal lines, first thin film transistors, first selection signal lines, second thin film transistors, second selection signal lines, and a scanning signal drive circuit connected to the first scanning connection lines, the first selection signal lines, and the second selection signal lines, wherein the scanning signal drive circuit sequentially supplies a pulse signal to the first scanning connection lines in a selection period in which a gate-on voltage is applied to the one of the first selection signal lines, and the scanning signal drive circuit applies a gate-off voltage to the one of the second selection signal lines corresponding to the one of the first selection signal lines to which the gate-on voltage is applied.

Display device

A liquid crystal display device includes: a liquid crystal display unit that displays, for each of frames, an image based on an input image signal; a drive unit that applies a voltage based on the input image signal to pixels of the liquid crystal display unit; and a control unit that controls an amplitude of the voltage applied to the pixels. The drive unit applies, in one of the frames, a voltage of the same polarity to the pixels connected to one of the source signal lines. The control unit includes: a temperature-information acquiring unit that acquires temperature information of the drive unit; and a filter unit that acquires high-frequency and low-frequency components of the input image signal in a substantial extending direction of the source signal lines. The control unit controls the amplitude of the applied voltage using the temperature information and an output value of the high-frequency component.

In the case where the gray-scale value of the pixel X is the minimum gray-scale value, the data line driving circuit () outputs a video signal having a voltage obtained by correcting the positive polarity minimum gray-scale voltage corresponding to the minimum gray-scale value only when outputting a positive polarity video signal. In the above, the data line driving circuit () outputs the video signal having the voltage obtained by correcting the positive polarity minimum gray-scale voltage, using a voltage correction amount larger than that which is used in outputting the video signal having the voltage obtained by correcting the positive polarity gray-scale voltage corresponding to the intermediate gray-scale value.

Liquid crystal display device with grey-scale voltage correction

A display device includes a display portion having gate and source signal lines, and a plurality of pixels, a gate driver that outputs gate signals, a source driver that outputs source signals, and a controller that causes the display portion to display an image at a frame frequency. The controller sets the frame frequency to a first frame frequency Fwhen the image is a moving picture, and the controller sets the frame frequency to a second frame frequency Flower than Fwhen the image is a still picture. The gate driver outputs the gate signals to the gate signal lines in an aligned order of gate signal lines in a second direction when the frame frequency is F, and the gate driver outputs the gate signals to the gate signal lines in different order from the array order when the frame frequency is F

Reducing deterioration in display quality of a displayed image on a display device

A liquid crystal display device which includes one image signal line which is connected to a plurality of pixels, a scanning line drive part which outputs an ON voltage to the respective pixels in a predetermined order, and a data line drive part which outputs image signal voltages. The data line drive part outputs a gray level signal voltage corresponding to a gray level value of the pixel as an image signal voltage in a first period, and outputs a correction gray level signal voltage different from the gray level signal voltage as an image signal voltage in a second period which precedes the first period. The liquid crystal display device further includes a control part which generates the correction gray level signal voltage based on the gray level value of the pixel and one or plurality of gray level values of pixels which precede the pixel in order.

Liquid crystal display device with correction unit to generate correction gray level signal voltages

A data line driving section () outputs a video signal voltage for each pixel to a data line (DL) for each predetermined period in order. In outputting a video signal voltage for a pixel, the data line driving section () outputs a gradation signal voltage having a voltage corresponding to a gradation value of the pixel as the video signal voltage during a second part of the predetermined period, and outputs a correction gradation signal voltage different from the gradation signal voltage as the video signal voltage during a first part of the predetermined period. A control section () changes a relationship between the correction gradation signal voltage and the gradation signal voltage based on a combination of the gradation value of the pixel and a gradation value of a pixel preceding the pixel.

Liquid crystal display device that suppresses deterioration of image quality

Provided is a liquid crystal display device, including: a data line; a plurality of pixel circuits; an output grayscale value generating circuit for outputting an output grayscale value obtained by correcting a display grayscale value indicating a grayscale potential having one of positive polarity and negative polarity; and a data-line driving circuit for selectively outputting an output potential having one of positive polarity and negative polarity corresponding to the output grayscale value to the data line. The data-line driving circuit outputs the potential so that the positive-polarity output potential corresponding to a smallest output grayscale value becomes lower than a positive-polarity grayscale potential indicated by a smallest one of the display grayscale values and that the negative-polarity output potential corresponding to the smallest output grayscale value becomes higher than a negative-polarity grayscale potential indicated by the smallest one of the display grayscale values.

A liquid crystal display device includes: a plurality of pixel circuits which is arranged in a matrix shape; a plurality of data lines; a selection unit which sequentially selects the plurality of pixel circuits for every group which is fewer in number than the number of rows of the pixel circuits; a control unit which sequentially changes the pixel circuits included in the groups; and a data signal supply unit which outputs a data signal to each data line. Each of the plurality of sequentially selected pixel circuits is connected to each of the different data lines.

Growing community of inventors

Yokohama, Japan

Yoshihisa Ooishi