Hitachi, Ltd.

Hitachi Device Engineering Co., Ltd.

Hitachi Video & Information

Tomohide Ohira

Tatsuhisa Fujii

Tatsuyuki Fumikura

Hitomi Madokoro

Mitsugu Katayama

Takeshi Maeda

Yasuyuki Kudo

Tsutomu Furuhashi

Hiroyuki Mano

Hiroyuki Nitta

Yoshihisa Ooishi

Tatsuhiro Inuzuka

Shinji Uchida

Hiroshi Kunihara

The present invention can realize better display of a dynamic image, and in addition, can make storage capacity of a memory smaller. A data conversion circuitcompares display dataof an n-th frame from the outside and display dataof the (n&#x2212;1)-th frame stored in the memoryto generate a driving data signalto deliver to a driver. Each time when a memory control circuitreads display data q, q, q, qcorresponding to 20 pixels out of the display dataof the (n&#x2212;1)-th frame, the memory control circuitcompresses display data d&#x2013;dof 20 pixels out of the display dataof the n-th frame from the outside to generated d, d, d, d, and stores the generated data into the same area where the display data q, q, q, qof the display data of the (n&#x2212;1)-th frame have been stored.

Display controller and display device provided therewith

A liquid crystal controller for controlling display of a liquid crystal display device of passive matrix type includes gray scale processing being performed on input data before being written in a frame memory for frame frequency conversion and gray scale processing being performed after the frequency conversion and reading of the data from the frame memory so that an amount of information of display data written in the frame memory can be reduced. Further, since the gray scale display pattern is switched by the same switching frequency as the converted frame frequency, pattern movement and flicker of the gray scale display portions can be reduced.

Liquid crystal controller and liquid crystal display unit

A liquid crystal display including a plurality of parallel display electrodes wired over an electrode substrate, terminals for the display electrodes led out to the end portion of the electrode substrate and connected to TCPs, the terminals having pitches smaller than those of the display electrodes, and leadout wirings for connecting the display electrodes and the terminals. The leadout wirings each consist of a portion extending from a respective display electrode as it is, a portion extended from the respective terminals as it is, and almost parallel, inclined linear wiring that connects the two extended portions. The length of the two extended portions and the width of the inclined linear wiring are adjusted so that the wiring resistances of the individual leadout wirings are substantially equal.

Liquid crystal display with substantially equal resistances for sets of

An object of this invention is to make uniform the gap in the frame edge portion of the liquid crystal device and the wiring resistances and to improve the display quality and minimize the frame edge area to the limit. To achieve the above object, the liquid crystal display of this invention comprises a plurality of parallel display electrodes 40-n wired over the electrode substrate 311 (312); terminals 41-n for the electrodes 40-n led out to the end portion of the electrode substrate 311 (312) and connected to TCPs, the terminals 41-n having pitches smaller than those of the electrodes 40-n; and leadout wirings 331 (332) for connecting the electrodes 40-n and the terminals 41-n. The leadout wirings 331 (332) each consist of a portion extended from the respective electrode 40-n as it is, a portion extended from the respective terminals 41-n as it is, and almost parallel, inclined linear wiring 42-n that connects the two extended portions. The length of the two extended portions and the width of the inclined linear wiring 42-n are adjusted so that the wiring resistances of the individual leadout wirings 331 (332) are almost the same.

Liquid crystal display with color filters and sizes of inclined linear

A dynamic scattering matrix LCD, which requires a low expenditure of electric power without deteriorating contrast even when it is used for a high speed response STN liquid crystal display, includes a plurality of data line transparent electrodes, a plurality of scanning line transparent electrodes, data line drivers which selectively supply one of two levels of a first voltage signal to each of the data line transparent electrodes according to contents of a display image, scanning line drivers which selectively supply one of three levels of a second voltage signal to each of the scanning line transparent electrodes according to a control signal, and a voltage supply circuit which supplies the first voltage signal to the data line drivers and the second voltage signal to the scanning line drivers. The voltage supply circuit produces the two levels of the first voltage signal from two predetermined voltages without boosting the two predetermined voltages, and produces the highest and lowest levels of the three levels of the second voltage signal by boosting the two levels of the first voltage signal.

Dynamic scattering matrix liquid crystal display having voltage booster

Growing community of inventors

Yokohama, Japan

Tomohide Ohira