公开(公告)号：CA2325614A1

公开(公告)日：2001-06-10

申请号：CA2325614

申请日：2000-11-10

Applicant: IBM

Inventor： DESGREZ SIMON ,  SAKAGUCHI YOSHITAMI

IPC: G02F1/133 ,  G02F1/1345 ,  G09G3/20 ,  G09G3/36 ,  H04N5/66 ,  G02F1/136

Abstract: It is one object of the present invention to reduce the number of inputs to an LCD driver and to reduce manufacturing costs by employing the COG & WOA technique. For a l iquid crystal display device, source driver ICs 20, among which video signals are transmitted and distributed via a video I/F 3, are cascade-connected, and the connection lin es to the source driver ICs 20 are reduced as much as possible to employ the COG & WOA technique. That is, a liquid crystal display device comprises: a liquid crystal cell 2, which forms an image display area on a substrate, and a source driver 7, which applies a voltage to the liquid crystal cell 2 based on a video signal input via a video I/F 3. The source driver 7 include s a plurality of source driver ICs 20 that are mounted on the same substrate as the liquid crystal cell 2 and that are cascade-connected by signal lines.

公开(公告)号：JP2003015613A

公开(公告)日：2003-01-17

申请号：JP2001200190

申请日：2001-06-29

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーション

Inventor： SAKUMA KATSUYUKI ,  SAKAGUCHI YOSHITAMI

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

CPC classification number: G09G3/3688 ,  G09G3/3648 ,  G09G2310/027 ,  G09G2320/0276 ,  G09G2330/02 ,  G09G2330/021

Abstract: PROBLEM TO BE SOLVED: To solve the problems such as fusion of power source wiring or the like even in the case of adopting the wiring incapable of securing a sufficient current capacity in an LCD panel. SOLUTION: This liquid crystal display device comprises a liquid crystal cell 2 forming a picture display area on a substrate, a source driver 7 for applying voltage to the liquid crystal cell 2 by using source driving ICs 20 supplied with power in a line saying form, and an LCD controller 4 for processing the signals received from a host side via a video I/F 3 and outputting the signals to be supplied to the source driver ICs 20, and this source driver 7 shifts each timing to start writing in the liquid crystal cell 2 the plurality of source driver ICs 20 among a plurality of the source driver ICs 20, to avoid concentration of the consumption current.

Abstract translation: 要解决的问题：即使在不能在LCD面板中确保足够的电流容量的布线的情况下，也能够解决诸如电源布线等的融合的问题。 解决方案：该液晶显示装置包括在基板上形成图像显示区域的液晶单元2，通过使用以线路形式提供电源的源极驱动IC20向液晶单元2施加电压的源极驱动器7， 以及LCD控制器4，用于经由视频I / F 3处理从主机侧接收的信号，并输出要提供给源极驱动器IC 20的信号，并且该源极驱动器7移动每个定时以开始写入液晶 在多个源极驱动器IC 20中的多个源极驱动器IC 20中，使电池2分离，以避免消耗电流的集中。

公开(公告)号：JP2001281686A

公开(公告)日：2001-10-10

申请号：JP2000086670

申请日：2000-03-27

Applicant: IBM

Inventor： SAKAGUCHI YOSHITAMI

IPC: G02F1/1345 ,  G09G3/20 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To reduce differences among voltages applied to chain-connected individual LSIs. SOLUTION: The liquid crystal display device comprises a liquid crystal cell forming an image display area on a substrate, plural driver LSIs which are arranged on this substrate and apply a voltage to the liquid crystal cell and a wiring structure which supplies voltages to reference voltage generators (Vref) 11-14 of the plural driver LSIs and is arranged on this substrate, and this wiring structure stepwise changes wiring resistance from a voltage supply point 17, supplies voltages to the reference voltage generators (Vref) 11-14 by an outward wiring 15 and a return wiring 16, and further these outward wiring 15 and return wiring 16 are connected in a single-stroke drawing form and supplies the voltages from the voltage supply point 17.

公开(公告)号：JP2001195031A

公开(公告)日：2001-07-19

申请号：JP34222199

申请日：1999-12-01

Applicant: IBM

Inventor： SAKAGUCHI YOSHITAMI ,  MIZUTANI MASAHIKO

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36 ,  G09G5/02 ,  H04N5/202 ,  H04N9/69

Abstract: PROBLEM TO BE SOLVED: To reduce the number of inputs of a LCD(liquid crystal display) driver chip and to suppress the variation among chips to be small. SOLUTION: A 10-bit 2-ary counter 202 free-runs in synchronism with a system clock. A 10-bit 5-staged shift register 200 stores the gamma correction data received from a PC. Comparators 204 compare the value X of the 2-ary counter 202 with values Ys stored in 10-bit registers to convert the gamma correction data into pulse widths. Outputs of the comparators 204 are latched in D-FFs 206 in synchronism with the system clock. Time-voltage transforming units 208 generate reference potentials for gamma correction by subjecting outputs of the D-FFs 206 to LPFs.

公开(公告)号：JPH0877683A

公开(公告)日：1996-03-22

申请号：JP21405494

申请日：1994-09-07

Applicant: IBM

Inventor： SAKAGUCHI YOSHITAMI

IPC: G06F17/15 ,  G01H3/00 ,  G11B19/02

Abstract: PURPOSE: To classify rotary devices for every kind of driving sounds. CONSTITUTION: A divider 20 divides for every predetermined time interval, time series data of an amplitude of a driving sound of an HDD 12 which is digitally converted by a converter 18, and generates a group of time series data for every frame. An analyzer 22 converts each of the group of time series data to a power spectrum. A cycle operator 24 sets a point of the highest auto- correlation of a leading frame and each of the other frames as a candidate for one cycle of the driving sound, detects a point of the highest auto-correlation starting at a leading time series data of the leading frame and the candidate, and specifies a cycle of the driving sound based on a frame of the candidate of the detected point of the highest auto-correlation and the leading frame. A comparator 28 compares a sample of approximately the same cycle as the cycle of the driving sound of the HDD 12 stored in a memory device 30 with the power spectrum of one cycle through a cross-correlation. A judging device 32 classifies the HDD 12 on the basis of the comparison result.

公开(公告)号：JP2005150274A

公开(公告)日：2005-06-09

申请号：JP2003383522

申请日：2003-11-13

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： SAKAGUCHI YOSHITAMI ,  NAKANO DAIKI ,  IMURA KENICHI ,  MEGATA KEITOKU ,  TAGUCHI TOMOYUKI

IPC: G01R31/00 ,  G01R31/26 ,  G01R31/28 ,  G09F9/00 ,  H01L27/12 ,  H01L29/786 ,  H01L51/50 ,  H05B33/14

CPC classification number: G01R31/2621 ,  G01R31/2831 ,  H01L27/12

Abstract: PROBLEM TO BE SOLVED: To provide an inspection device which precisely inspects a characteristic of TFT which supplies current to respective pixels constituting a display device. SOLUTION: The inspection device 10 inspects TFT (Thin-Film Transistor) supplying current to a light-emitting element. The device is provided with a first current supply circuit 100 supplying drain current between a drain and a source of TFT, a gate voltage adjusting circuit 110 adjusting gate voltage applied to a gate of TFT so that specified current which is previously decided flows between the drain and the source of TFT and a measuring part 120 for measuring gate voltage adjusted by the gate voltage adjusting circuit. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：提供一种检查装置，其精确地检查向组成显示装置的各个像素提供电流的TFT的特性。 检测装置10检查向发光元件供给电流的TFT（薄膜晶体管）。 该器件设置有在TFT的漏极和源极之间提供漏极电流的第一电流源电路100，栅极电压调整电路110，调整施加到TFT的栅极的栅极电压，使得预先确定的规定电流在漏极 TFT的源极和用于测量由栅极电压调节电路调节的栅极电压的测量部分120。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2005134421A

公开(公告)日：2005-05-26

申请号：JP2003366947

申请日：2003-10-28

Applicant: Internatl Business Mach Corp ,  インターナショナル・ビジネス・マシーンズ・コーポレーションInternational Business Maschines Corporation

Inventor： NAKANO DAIKI ,  SAKAGUCHI YOSHITAMI

IPC: H05B33/10 ,  G09F9/00 ,  H01L51/50 ,  H05B33/12 ,  H05B33/14

CPC classification number: G09G3/006 ,  G09G3/3225

Abstract: PROBLEM TO BE SOLVED: To provide an inspection instrument of active matrix panel and an inspection method of active matrix panel capable of obtaining a highly accurate measurement result to which features at every factors are added by using plural times of measurement results for pixel circuits matrically arranged and performing inspections by means of a statistical technique. SOLUTION: The inspection instrument of active matrix panel for inspecting characteristics of an active matrix panel before OLED formation is provided with a roller-shaped contact probe 18 which has at least the surface made of conductive material and is successively brought into pressing contact with pixel electrodes formed on the active matrix panel while rotating, a probe control circuit 19 for applying a voltage necessary for the measurement to a TFT array whose pixel electrodes are contacted by the roller-shaped contact probe 18 and a computer 12 which measures a current flowing through the TFT array with the voltage applied thereto and statistically processes the measurement results. COPYRIGHT: (C)2005,JPO&NCIPI

Abstract translation: 要解决的问题：为了提供有源矩阵面板的检查装置和有源矩阵面板的检查方法，能够通过使用多个像素的测量结果来获得每个因素上的特征的高精度测量结果 电路顺序排列，并通过统计技术进行检查。 解决方案：用于在OLED形成之前检测有源矩阵面板的特性的有源矩阵面板的检查仪器设置有至少具有由导电材料制成的表面并连续地进行压接的辊状接触探针18 在旋转时形成在有源矩阵面板上的像素电极，用于将测量所需的电压施加到像素电极与辊状接触探针18接触的TFT阵列的探测控制电路19和测量电流的计算机12 以施加电压的方式流过TFT阵列并统计处理测量结果。 版权所有（C）2005，JPO＆NCIPI

公开(公告)号：JP2002341832A

公开(公告)日：2002-11-29

申请号：JP2001145686

申请日：2001-05-15

Applicant: IBM

Inventor： SAKAGUCHI YOSHITAMI ,  SAKUMA KATSUYUKI

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/36

Abstract: PROBLEM TO BE SOLVED: To suppress adverse effect on an analog output voltage caused by the switching corresponding to digital input data. SOLUTION: The liquid crystal display device is provided with a pulse generating circuit 21 which is a liquid crystal driver to supply voltage to be applied to liquid crystal cells forming an image display region and generates a plurality of reference pulses that are weighted for pulse generating density, pulse selecting/synthesizing circuits 23 which generate pulse trains by selecting/synthesizing necessary reference pulses based on digital input data of the reference pulses and integrating circuits (low pass filters) 25 which integrate the pulse trains generated by the circuits 23 and output analog voltages for gamma correction. The number of switchings per unit time of the pulse trains generated by the circuits 21 and 23 does not change in a prescribed range of gamma correction digital input data.

公开(公告)号：JP2001174843A

公开(公告)日：2001-06-29

申请号：JP35178499

申请日：1999-12-10

Applicant: IBM

Inventor： SAKAGUCHI YOSHITAMI ,  DEGURE SIMON

IPC: G02F1/133 ,  G02F1/1345 ,  G09G3/20 ,  G09G3/36 ,  H04N5/66

Abstract: PROBLEM TO BE SOLVED: To attain cost reduction by realization of a COG(chip on glass) and a WOA(wiring on array) by reducing the number of inputs of LCD(liquid crystal display) drivers. SOLUTION: The COG and the WOA are realized by reducing wirings to respective source divers IC 20 as much as possible while cascading the source drivers IC 20 to which the video signal inputted through a video I/F(interface) 3 is distributed in a liquid crystal display device. That is, this device is provided with a liquid crystal cell 2 forming a picture display area and a source driver 7 applying voltages to the liquid crystal cell 2 based on the video signal inputted through the video I/F 3 on a substrate and the driver 7 has plural source drivers IC 20 which are mounted on the same substrate on which the cell 2 is mounted and, also, which are cascaded by using signal lines.

公开(公告)号：JPH11338423A

公开(公告)日：1999-12-10

申请号：JP13290498

申请日：1998-05-15

Applicant: IBM

Inventor： YAMADA FUMIAKI ,  SAKAGUCHI YOSHITAMI

IPC: G02F1/133 ,  G09G3/20 ,  G09G3/34 ,  G09G3/36 ,  H04N5/74 ,  H04N9/31

Abstract: PROBLEM TO BE SOLVED: To provide a driving principle of a color display by taking the difference of sensitivities of human eyes against flickers of each color, a TFT liquid crystal display module structure suitable for this method, and a two-board system projection type display device. SOLUTION: Concerning a critical fusion frequency in which a flicker comes not to be felt and to be seen fused, G(green) is the highest, and also the sensitivity of human eyes is the highest, therefore, the number of writing of a G(green) color is made more than those of other primary colors or the display period thereof is taken longer, and instead of a repeating unit, R, G, B, by which a color image is usually driven sequentially a repeating unit, R, G, B, G, is newly set, to thereby set a refresh rate relative to important G as a necessary and sufficient one. Therefore, without degrading a display quality, a refresh frequency as a whole is reduced and the power consumption of a display element is reduced, and a requirement concerning a time response speed is mitigated.