Nec Corporation

Kyowa Hakko Kirin Co., Limited

Shuji Ishihara

Koichiro Nishimura

Takashi Mimura

Masahiro Hoshikawa

Provided are a method for purifying mitomycin C, comprising a step of recrystallizing crude mitomycin C crystals using a high-purity methanol; mitomycin C obtainable by the method; and the like.

Method for purifying mitomycin C

An active matrix liquid crystal display panel is composed of a number of liquid crystal display elements arranged in the form a matrix, each of the liquid crystal display elements being composed of an individual display electrode, a common electrode, and a liquid crystal material sandwiched between the individual display electrode and the common electrode. The individual display electrode of each of the liquid crystal display elements is selectively activated through an associated active element. A liquid crystal display element connected to a defective active element is modified by burning the associated color filter and/or heating the liquid crystal to render the liquid crystal translucent to become a half tone display element, so that the liquid crystal display element connected to the defective active element becomes overshadowed or inconspicuous when the display panel is in operation.

Device and method for reducing the observability of a defective pixel in

A timing pulse generator comprises a flip-flop set by a gate pulse (or a horizontal synchronizing pulse), a NAND gate receiving an inverted gate pulse and an inverted output of the flip-flop, an oscillator controlled by the output from the NAND gate and producing a first clock pulse, a means for producing a second clock pulse in response to the first clock pulse to clock the flip-flop, and a counter counting the first clock pulse and being reset by the output from the flip-flop.

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Tokyo, Japan

Shuji Ishihara