Asahi Glass Company, Limited

Optrex Corporation

Other

Makoto Nagai

Akira Nakazawa

Yoshinori Hirai

Takeshi Kuwata

Kazuyoshi Kawaguchi

Kiyoshi Tamai

Masakazu Kitamura

Satoshi Niiyama

Masao Ozeki

Hiroyuki Motegi

Shinya Tahara

Noriko Suehiro

Tomohiro Takano

A driving method for a liquid crystal display device with a cholesteric liquid crystal having a memory mode of operation including a first stage of applying a first voltage to change the state of the cholesteric liquid crystal to a homeotropic state, a second stage of applying a second voltage to change the state of the cholesteric liquid crystal to a homogeneous state or a homogeneous/planar-mixed state, and a third stage of applying a third voltage to change the state of the cholesteric liquid crystal from the homogeneous state or the homogeneous/planar-mixed state to a focalconic state.

Driving method for a cholesteric liquid crystal display device having a memory mode of operation and a driving apparatus

The liquid crystal display device includes a MLA operating circuit which reads from gradation data of [b, b, b] stored in frame memories bin a period of the first frame, and band bin periods Tand Tof the second frame to produce a column data signal([c, c, c]), and a timing control circuit which controls a latch signal to column drivers so that the time ratio of the first frame to the second frame is 4:3 and the time ration of divided selection periods in the second frame is 2:1. With this, the number of change points of voltage level applicable in selection periods can be reduced whereby occurrence of a waveform distortion is minimized and a possibility of an uneven display in the liquid crystal display device is reduced.

Driving method and driving device for a display device

A liquid crystal display (LCD) is improved. A driving method for a LCD which has a liquid crystal layer interposed between the first electrode and the second electrode so that voltages to be applied to pixels are changed, wherein voltage levels in a selection time in a Pulse Width Modulation (PWM) driving method are the same level between two successive column electrodes so as to obtain a color display or a gray scale display which corresponds to an intermediate voltage applied to a pixel.

Gray scale driving method for a birefringent liquid display service

Driving is effected by MLA under a condition of L&ne;M or (M/L&middot;(L&plus;D) )&ne;N where M represents the total number of row electrodes, L represents the number of simultaneously selected row electrodes, D represents the number of dummy row electrodes and N represents the maximum magnifying power of a column voltage wherein driving is performed at a driving bias ratio which is deviated toward the minimum bias ratio with respect to the optimum bias ratio.

Method of driving passive matrix liquid crystal display

Presented is a driving device for a liquid crystal panel , which is provided with a controller , a memory , a row selection pattern generating circuit , a row voltage generating circuit , a latch circuit B, a column voltage generating circuit and an operating circuit (a line buffer group , a comparator circuit , adder circuits A, B, a latch circuit A and an imaginary data generating circuit ), wherein an orthogonal matrix B of 6 simultaneously selected rows and 2 imaginary rows which is formed by expanding an orthogonal matrix A of 4 rows is used for a row selection pattern, and column output voltages are operated with a unit of A.

Driving device and liquid crystal display device

Driving method for a liquid crystal display device

Method of driving a picture display device

A method of driving an image display device including the steps of: dividing row electrodes of an image display device having a plurality of row electrodes and a plurality of column electrodes into a plurality of subgroups; selecting summarizingly one of the plurality of subgroups; applying voltages based on signals formed by expanding time-sequentially column vectors of an orthogonal matrix on the row electrodes; performing a gray scale display by a frame rate control (FRC) by using a plurality of frames; performing a space modulation shifting a phase of the FRC with a pixel block comprising a plurality of pixels as a unit; and wherein the phase of the space modulation is set such that a ratio of the columns each applying an equally effective voltage on all of the pixels in the column in each frame in displaying an intermediate gray scale level by all of the pixels belonging to the same subgroup is 40% or more on an average of all of the intermediate gray scale levels and all of the frames.

Multiple line simultaneous selection method for a simple matrix LCD

Growing community of inventors

Yokohama, Japan

Makoto Nagai