Mitsubishi Chemical Corporation

Mitsubishi Kagaku Media Co., Ltd.

Canon Kabushiki Kaisha

Lapis Semiconductor Co., Ltd.

Oki Electric Industry Co., Ltd.

Nippon Sanso Corporation

Takashi Ohno

Michikazu Horie

Masae Kubo

Masaaki Mizuno

Natsuko Nobukuni

Haruo Kunitomo

Hironobu Mizuno

Hiroyuki Hoshino

Hideyuki Kubo

Akio Okamuro

Ken-Ichi Takada

Masakuni Kawagoe

Takahiro Imayoshi

Masao Komatsu

Kanako Tsuboya

Hiroshi Tsuchi

Yasuhiro Kowa

Kenjirou Kiyono

Yoshihiro Noda

Hitoshi Doi

Jouji Ooki

Ikuo Miura

Kenjiro Kiyono

Kenichi Takada

Ken' Ichi Takada

Ken'Ichi Takada

Naoki Taniguchi

A source driver includes a data latch unit that outputs acquired pixel data, a gradation voltage conversion unit that acquires the pixel data outputted from the data latch unit and converts the pixel data to gradation voltages, an output unit that amplifies and outputs the gradation voltages to source lines, and a timing control unit that controls the timing of the output of the pixel data from the data latch unit. The timing control unit performs control such that the longer a source line is from a source driver to a pixel column, the smaller the timing difference is between acquisition of the pixel data by the data latch unit and the output of the pixel data.

Source driver that adjusts a timing of outputting of pixel data based on a length of a source line, and display device

A driver IC has a rectangular shape, and includes a first input terminal group in which first input terminals are disposed at intervals along a first long side, that is opposite a side that faces a display section, from a first short side. A second input terminal group is provided in which second input terminals are disposed at intervals along a second long side that faces the display section, from the first short side. An output terminal group is provided in which output terminals that output signals to the display section are disposed at intervals along the second long side from a position, which is spaced apart for a predetermined distance from where the second input terminals are disposed, to a second short side. A terminal group is not provided at positions that oppose the output terminal group at the first long side.

Display panel

The present invention provides a display panel including: a first input terminal group in which input terminals are disposed at intervals along first long side of a rectangular driver IC facing a panel end portion; a second input terminal group in which input terminals are disposed at intervals along the second long side of the driver IC facing a display section; a first wiring group connected to the first input terminal group, that extends under the first short side of the driver IC and extends out from between the driver IC and the panel body; and a second wiring group connected to the second input terminal group, that passes under the second long side of the driver IC and extends out from between the driver IC and the panel body.

A multilayer-type optical recording medium having a translucent recording/reproducing functional layer containing a first protective layer, a second protective layer, a recording layer, a third protective layer, a reflective layer and a fourth protective layer in this order relative to incident laser light. The second protective layer and the fourth protective layer are made of the same kind of material. The refractive index of the second protective layer is higher by at least 0.3 than the refractive index of the first protective layer. When the film thickness of the second protective layer is set as D2, the film thickness of the fourth protective layer is set as D4, and the reflectivity before recording when the laser light is focused on the recording layer is set as R, the derivatives d(R)/d(D2) and d(R)/d(D4) have opposite signs from each other.

Optical recording medium

A rewritable optical recording medium including: a substrate having a guide groove formed thereon, a phase-change type recording layer, a portion in a crystalline state of the phase-change type recording layer corresponds to an unrecorded or erased state, and a portion in an amorphous state of the phase-change type recording layer corresponds to a recorded state, so that an amorphous mark corresponding to the recorded state is formed upon irradiation with a recording laser beam. The phase-change type recording layer contains Sb as a main component, and further contains Ge and/or Te, a content of Ge is from 1 atomic % to 30 atomic %, and a content of Te is from 10 atomic % to 30 atomic %, and in the phase-change type recording layer, Sb/Te is at least 4.5, and the atomic ratio of Ge to Te is from 1:3 to 1:20.

Rewritable optical recording medium and optical recording method

A phase-change recording material used for an information recording medium utilizing a crystalline state as a non-recorded state and an amorphous state as a recorded state, which has the composition of the following formula (1) as the main component:(SbSn)GeTeM1&#x2003;&#x2003;formula (1)wherein each of x, y, z and w represents atomicity, x, z and w are numbers which satisfy 0.01&#x2266;x&#x2266;0.5, 0&#x2266;z&#x2266;0.3 and 0&#x2266;w&#x2266;0.1, respectively, and the element M1 is at least one element selected from the group consisting of In, Ga, Pt, Pd, Ag, rare earth elements, Se, N, O, C, Zn, Si, Al, Bi, Ta, W, Nb and V, and

Phase-change recording material used for information recording medium and information recording medium employing it

A rewritable optical recording medium includes a substrate and a phase-change type recording layer. A portion in a crystalline state corresponds to an unrecorded or erased state, and a portion in an amorphous state correspond to a recorded state, to record EFM modulated information by forming amorphous marks by irradiating the recording layer with a recording laser beam, and the recording is carried out by irradiating a recording laser beam having a wavelength of about 780 nm through an optical system having a numerical aperture NA of 0.5 or 0.55, at 24-times velocity or 32-times velocity of the reference velocity.

Provided is an optical recording method for recoding information on a phase-change optical recording medium at a low linear velocity by use of a divided pulse method. When forming a plurality of recording marks by use of a constant divided pulse number m, a light irradiation time period of recording light for recording a recording mark having a time length of nT is divided in the order of {&#x3b1;T, &#x3b2;T, &#x3b1;T, &#x3b2;T, . . . , &#x3b1;T, &#x3b2;T, . . . , &#x3b1;T, &#x3b2;T} (in which m is a natural number representing a divided pulse number, &#x3b1;(1&#x2266;i&#x2266;m) is a real number greater than 0, &#x3b2;(1&#x2266;i&#x2266;m&#x2212;1) is a real number greater than 0, and &#x3b2;is a real number equal to or above 0). Then, the recording light having increased recording power Pwfor recording the shortest recording mark is applied so as to provide m satisfying a relation that an average value Pwof the recording power Pwat the time periods of &#x3b1;T for forming the shortest recording mark is greater than an average value Pwof the recording power Pwat the time periods of &#x3b1;T for forming the longest recording mark (Pw&#x3e;Pw).

Optical recording method

In a rewritable compact disc having a wobble groove on a substrate, crystal and amorphous states of a phase-change recording layer are an unrecorded/erased state and a recorded state, respectively. When the recording layer is exposed to recording light, amorphous marks assuming the recorded state are formed. At any of 2-, 4- and 8-times velocities with respect to a reference velocity (1-times velocity) whose linear velocity is 1.2-1.4 m/s, modulation mof a recorded signal when the recording light of approximately 780 nm in wavelength irradiates the recording layer via an optical system with NA=0.5 or 0.55 is 60-80%. A topmost level Rof reflectivity of the eye pattern of the recorded signal during retrieving at the 1-times velocity is 15-25%, and a jitter of the individual length of marks and inter-mark spaces during retrieving at 1-times velocity is 35 ns or less. Recording at 8-times or higher velocities is thereby realized without any risk of impairing the read-compatibility with the conventional CD-RW specifications at least at 4-times velocity.

Rewritable optical recording medium, recording method on the same, and optical disc recording/retrieving apparatus

An optical information recording medium for recording information by a plurality of record mark lengths, wherein the shortest mark length is at most 0.5 &#x3bc;m, and a crystal state is an unrecorded or erased state and an amorphous state is a recorded state, wherein the erasing is carried out by recrystallization which substantially proceeds by crystal growth from an interface between the amorphous portion or a melt portion and a peripheral crystal portion; and an optical recording method suitable therefore. The medium of the present invention has characteristics that overwriting can be made at a high speed, the jitter of mark edge is small, mark length modulation recording can be made at a high density, and the formed mark is excellent in the stability with the lapse of time.

Optical information recording medium and optical recording method

In an optical recording method used when information is recorded in a phase-change recording layer of a large-capacity rewritable optical recording medium such as a DVD-RW, one block pulse is used as a recording pulse for forming one recording mark when a recording velocity is higher than a recording linear velocity at which the rewritable optical recording medium can be rewritten, whereas a pulse train comprised of a plurality of short pulses is used as the recording pulse for forming one recording pulse when the recording velocity is within recording linear velocities at which the rewritable optical recording medium can be rewritten, whereby high-velocity recording is realized.

Phase-change recording layer optical recording method

In a rewritable compact disc having a wobble groove on a substrate, crystal and amorphous states of a phase-change recording layer are an unrecorded/erased state and a recorded state, respectively. When the recording layer is exposed to recording light, amorphous marks assuming the recorded state are formed. At any of 2-, 4- and 8-times velocities with respect to a reference velocity (1-times velocity) whose linear velocity is 1.2&#x2013;1.4 m/s, modulation mof a recorded signal when the recording light of approximately 780 nm in wavelength irradiates the recording layer via an optical system with NA=0.5 or 0.55 is 60&#x2013;80%. A topmost level Rof reflectivity of the eye pattern of the recorded signal during retrieving at the 1-times velocity is 15&#x2013;25%, and a jitter of the individual length of marks and inter-mark spaces during retrieving at 1-times velocity is 35 ns or less. Recording at 8-times or higher velocities is thereby realized without any risk of impairing the read-compatibility with the conventional CD-RW specifications at least at 4-times velocity.

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Kanagawa, Japan

Takashi Ohno