Fujitsu Corporation

Sharp Kabushiki Kaisha Corporation

Fujitsu Display Technologies Corporation

Katsunori Tanaka

Katsuhiko Kishida

Koichi Katagawa

Hirofumi Miyamoto

Hidefumi Yoshida

Yuichi Inoue

Toshiaki Suzuki

Yoshihisa Taguchi

Mikio Oshiro

Toshiya Onodera

Tetsuya Kobayashi

Kazutaka Hanaoka

Hisashi Yamaguchi

Seiji Tanuma

Takatoshi Mayama

Satoshi Sekido

Makoto Ohashi

Takeshi Gotoh

Shinpei Nagatani

Katsuyoshi Hiraki

Takae Ito

Takashi Sasabayashi

Masaki Miyahara

Tsutomu Kai

Toshimitsu Minemura

Masanori Nakamura

Tosiya Onodera

Hiroshi Yamazaki

Fumiaki Yamada

Koshu Yonemura

Motohiko Fukuhara

Hiroyuki Isogai

Mikio Oshio

Kazuya Toyota

Fumiko Shiono

The display device is provided with a precharge power source that supplies only precharge voltages (precharge voltages corresponding to the maximum gradation value for each of the positive polarity and the negative polarity) corresponding to one gradation value. The source driver includes a data voltage generation circuit configured to generate data voltage depending on input data and an output circuit configured to apply the data voltage to each source bus line after applying precharge voltage. The output circuit changes the length of the precharging period during which the precharge voltage is applied to each source bus line, depending on input data.

Display device performing precharge of video signal lines and drive method thereof

A liquid crystal display device includes a panel having pixel electrodes arranged at intersections of a plurality of signal lines via switching elements for transmitting display data and a plurality of scanning lines for transmitting control signals, and a control circuit for controlling the panel. The liquid crystal panel is divided into first pixel regions and second pixel regions adjacent to the first pixel regions. The control circuit carries out impulse driving in which the control signals transmitted to each of the scanning lines are activated two times in one frame period for displaying an image. The control circuit writes the display data in either one of the pixel regions and writes reset data in the other pixel regions when the control signals are activated once of the two times. By writing the reset data in the pixel regions, the display data written in an immediately preceding frame are reset. In consecutive frames, the display data written in the pixel regions are always reset in one frame period. Therefore, blurring in a moving image can be alleviated. Since writing the display data and the reset data is carried out separately in the first pixel regions and in the second pixel regions, flicker is prevented from occurring in a display screen.

Apparatus and method to improve quality of moving image displayed on liquid crystal display device

A liquid crystal display apparatus includes a liquid crystal display unit, a plurality of data driving units which provide image data to said liquid crystal display unit, and a control unit which enables said plurality of data driving units to take in the image data simultaneously if the image data to be provided to said data driving units are identical.

Liquid crystal display apparatus and reduction of electromagnetic interference

In a liquid crystal display device in which picture elements are arranged in a matrix form, a fixed time before a display data voltage is supplied to the picture element by a data line and a scan line, a pre-write voltage at a gradation value having a high speed of response to a change in gradation is supplied to the picture element regardless of the gradation value of a picture after response. When the display data voltage is supplied to the picture element, the pre-write voltage is always supplied to the picture element to thereby increase the response speed of liquid crystal constituting the liquid crystal display device regardless of the gradation value of a picture after response, so as to display quickly a picture on a display section.

Matrix display device having switching circuit for selecting either a picture voltage or a pre-write voltage for picture elements

Since the drive data for display or their correction values are stored in correspondence with the combination of the upper bits of the current frame image data and the upper bits of the previous frame image data, the capacity of the high-speed memory circuit that stores the conversion table can be reduced. Accompanying the reduction in the capacity of the conversion table, since the precision of the display drive data or their correction values becomes lower, an interpolation circuit is provided and, by means of an interpolation calculation the display, drive data or their correction values having increased precision is generated and consequently the input image data is corrected to generate the display drive data.

Liquid crystal display control circuit that performs drive compensation for high-speed response

A display has a display panel of a first aspect ratio and is able to display on the display panel an image of a second aspect ratio whose width element is larger than that of the first aspect ratio. The display has a gate driver, a data driver, and a timing controller. The gate driver sequentially selects gate lines of the display panel. The data driver stores data for one gate line and supplies the data to one of the gate lines selected by the gate driver. The timing controller supplies control signals to the gate and data drivers so that predetermined data is displayed in top and bottom non-image areas of the display panel during a vertical blanking period. The display is capable of displaying images of different sizes.

Display and method of and drive circuit for driving the display

A driving circuit for a matrix-type panel includes a control circuit which causes image data to be supplied to the matrix-type panel when a synchronization between the image data and an operation of the matrix-type panel is established after a supply of a given timing signal necessary for an operation of the control circuit is stopped and is then restarted.

Matrix-type panel driving circuit and method and liquid crystal display device

A method of forming a laminated glass substrate structure suitable for use in a display device or the like, includes the steps of: a) preparing a first glass substrate having first and second main faces; b) preparing a second glass substrate having third and fourth main faces; c) after the steps a) and b), adhering the first and second glass substrates with a space formed therebetween and with the third main face facing to the second main face; and d) after the step c), performing a smoothing process relative to all edges excepting one edge among edges defining the first main face. The laminated glass substrate structure provides an improved load resistance.

Laminated glass substrate structure and its manufacture

A flexible printed circuit having wiring patterns printed on a flexible resin film, comprising a narrow flexible area having first wiring patterns and constituting a flexible wiring part and a broad connection area adapted to be adhered to a main board and having second wiring patterns connected to the first wiring patterns and adapted to be electrically connected to wiring patterns on the main board. The second wiring patterns serve to electrically connect the first wiring patterns of the flexible wiring part to the wiring patterns on the main board. Also included is a conductive adhesion surface formed on the broad connection area along a side of the main board, having a width larger than a width of the first wiring patterns, and extending from an inside of a region to an outside thereof. The region is defined in the broad connection area by extending a boundary of the flexible area into the broad connection area. A flexible printed circuit can be provided which has a high peel-off resistance to an applied stress.

Flexible printed circuit and connected printed circuit structure

A display device includes a display panel having display pixels arranged in matrix formation. A first driver circuit sequentially supplies image data to vertical lines of the display panel in synchronism with a first clock signal. A second driver circuit sequentially drives horizontal lines in synchronism with a second clock signal. A control circuit controls a drive timing at which the second driver circuit sequentially drives the horizontal lines so that identical image data equal to one horizontal line is supplied, from the first driver circuit in synchronism with the first clock signal, to two consecutive horizontal lines every N horizontal lines (N is an integer) in accordance with an enlargement ratio at which an image is enlarged in a vertical direction and is displayed on the display panel.

Liquid crystal display device and display method of the same

A driving circuit for driving an LCD, using frame modulation, includes: a data converting circuit for frame modulation having at least two averaged patterns for use in averaging brightness during frame modulation and converting display data using the averaged patterns and a display data detecting circuit for detecting the logical states of at least two leading dots specified in said display data. The data converting circuit for frame modulation controls switching of the at least two averaged patterns according to the result of detection. This configuration makes it possible to substantially prevent the occurrence of flickers irrespective of the display pattern. This contributes to realization of an excellent display.

Frame modulation driving circuit and method for liquid crystal display

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Kawasaki, Japan

Katsunori Tanaka