公开(公告)号：EP0831356A4

公开(公告)日：1998-11-04

申请号：EP95919659

申请日：1995-05-29

Applicant: IBM

Inventor： SHINOHARA MASAMI ,  UDA MITSURU ,  ENAMI KUNIO

IPC: G02F1/1339 ,  H04N9/31 ,  G02F1/13

CPC classification number: H04N9/3105 ,  G02F1/13394

Abstract: A projection liquid crystal display using liquid crystal light valves, having columnar spacers formed in pixel array regions, and designed to prevent deterioration of contrast and minimize persistence. Three liquid crystal light valves corresponding to red, green and blue include a plurality of columnar spacers for keeping predetermined cell gaps in pixel array regions. The columnar spacers in the pixel array regions are disposed in such a manner that they do not overlap when projected on a screen.

公开(公告)号：JPH0933891A

公开(公告)日：1997-02-07

申请号：JP18138995

申请日：1995-07-18

Applicant: IBM

Inventor： ENAMI KUNIO ,  TOMOOKA TAKATOSHI

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

Abstract: PROBLEM TO BE SOLVED: To improve picture quality in a display image even when a data voltage applied period is short. SOLUTION: A gate line driver 34 applies a gate voltage to many pieces of gate lines G1-Gm successively for a prescribed period each. A data line is grouped to four groups (d1A-dnA: A group, d1B-dnB: B group, diC-DnC: C group, diD-dnD: D group) respectively consisting of (n) pieces of data lines, and a data line driver 40 and a multiplexer 38 apply a data voltage to respective data lines of prescribed data line group in the prescribed period successively for the data line groups A-D. A precharge controller 44 and a voltage switch circuit 46 apply a precharge voltage (+V1 or -V1 ) of the same polarity as the data voltage next applied to respective data lines to respective data line groups A-D through a transistor 42 between the time when the data voltage is applied the last time and the time the data voltage is applied next.

公开(公告)号：DE69629985D1

公开(公告)日：2003-10-23

申请号：DE69629985

申请日：1996-07-04

Applicant: IBM

Inventor： ENAMI KUNIO ,  TOMOOKA TAKATOSHI

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

Abstract: A gate line driver (34) sequentially applies the gate voltage to a number of gate lines G1 - Gm by predetermined duration. Data lines are grouped into four groups each consisting of n lines (d1A - dnA: group A, d1B - dnB: group B, d1C - dnC: group C, and d1D - dnD: group D). A data line driver (40) and a multiplexer (38) sequentially perform for the data line groups A - D in the above predetermined duration application of data voltage to each data line in a predetermined data line group. A precharge controller (44) and a voltage switching circuit (46) apply to each of the data line groups A - D, through a transistor (42), a precharge voltage (+V1 or -V1) with the same polarity with that of data voltage being applied next time during the time from previous application of the data voltage to next application of it.

公开(公告)号：DE69629985T2

公开(公告)日：2004-07-15

申请号：DE69629985

申请日：1996-07-04

Applicant: IBM

Inventor： ENAMI KUNIO ,  TOMOOKA TAKATOSHI

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

Abstract: A gate line driver (34) sequentially applies the gate voltage to a number of gate lines G1 - Gm by predetermined duration. Data lines are grouped into four groups each consisting of n lines (d1A - dnA: group A, d1B - dnB: group B, d1C - dnC: group C, and d1D - dnD: group D). A data line driver (40) and a multiplexer (38) sequentially perform for the data line groups A - D in the above predetermined duration application of data voltage to each data line in a predetermined data line group. A precharge controller (44) and a voltage switching circuit (46) apply to each of the data line groups A - D, through a transistor (42), a precharge voltage (+V1 or -V1) with the same polarity with that of data voltage being applied next time during the time from previous application of the data voltage to next application of it.

公开(公告)号：DE69530425T2

公开(公告)日：2003-12-18

申请号：DE69530425

申请日：1995-05-29

Applicant: IBM

Inventor： SHINOHARA MASAMI ,  UDA MITSURU ,  ENAMI KUNIO

IPC: G02F1/1339 ,  H04N9/31 ,  G02F1/13

Abstract: The present invention relates to a projection type liquid crystal display device and a method for the manufacture thereof. It is the object of the present invention to provide a liquid crystal display device having pillar-shape spacers formed in pixel array regions with improved display properties by preventing the degradation of contrast and the occurrence of residual images, and a method for the manufacture of such a liquid crystal display device. In the liquid crystal display device comprising three liquid crystal light valves for displaying images corresponding to red (R), green (G) and blue (B), and having a plurality of pillar-shape spacers for maintaining a prescribed cell gap formed in their pixel array regions, a plurality of pillar-shape spacers formed in their pixel array regions are provided at locations which do not overlap with each other when images are projected on the screen.

公开(公告)号：DE69530425D1

公开(公告)日：2003-05-22

申请号：DE69530425

申请日：1995-05-29

Applicant: IBM

Inventor： SHINOHARA MASAMI ,  UDA MITSURU ,  ENAMI KUNIO

IPC: G02F1/1339 ,  H04N9/31 ,  G02F1/13

Abstract: The present invention relates to a projection type liquid crystal display device and a method for the manufacture thereof. It is the object of the present invention to provide a liquid crystal display device having pillar-shape spacers formed in pixel array regions with improved display properties by preventing the degradation of contrast and the occurrence of residual images, and a method for the manufacture of such a liquid crystal display device. In the liquid crystal display device comprising three liquid crystal light valves for displaying images corresponding to red (R), green (G) and blue (B), and having a plurality of pillar-shape spacers for maintaining a prescribed cell gap formed in their pixel array regions, a plurality of pillar-shape spacers formed in their pixel array regions are provided at locations which do not overlap with each other when images are projected on the screen.