Liquid crystal cell assembly and liquid crystal cell manufacturing method

• US 7,605,901 B2
• Filed: 03/28/2007
• Issued: 10/20/2009
• Est. Priority Date: 03/30/2006
• Status: Active Grant

• Current Assignee: Ortus Technology Co., Ltd. (TOPPAN Holdings, Inc.)
• Original Assignee: Casio Computer Company Limited
• Inventors: Iwasaki, Makoto, Nishino, Toshiharu, Yoshino, Masao, Danjo, Shinji
• Primary Examiner(s): Nelms; David
• Assistant Examiner(s): NGUYEN, THANH NHAN P
• Application Number:
  US11/729,417
• Publication Number:
  US 20070228381A1
• Time in Patent Office: 937 Days
• Field of Search: 349/153, 349/190, 349/187, 257/72
• US Class Current: 349/153
• CPC Class Codes: G02F 1/133351 Manufacturing of individual cells out of a plurality of cells, e.g. by dicing
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells

Abstract

A liquid crystal cell assembly includes a first substrate member on which at least first electrodes are formed on each of cell regions which respectively correspond to liquid crystal cells and are arranged to be adjacent to each other, a second substrate member on which at least a second electrode opposing the first electrodes is formed on each cell region to correspond to each cell region of the first substrate member, and frame-like seal members which are arranged between the first substrate member and second substrate member, include common sides each formed by continuously connecting at least two adjacent side, are formed into frames that respectively define the cell regions, and bond the first and second substrate members.

Claims

1. A liquid crystal cell assembly comprising:

a first substrate member on which at least first electrodes are formed in each of a plurality of cell regions, the cell regions being arranged to respectively correspond to liquid crystal cells and to be adjacent to each other;

a second substrate member on which, for each of the cell regions, at least a second electrode is formed to oppose the first electrodes formed in the cell region;

frame-like seal members which are arranged between the first and second substrate members, are formed into frames that respectively define the cell regions, and bond the first and second substrate members, wherein adjacent frame-like seal members have common sides formed by continuously linking at least two adjacent sides of the adjacent frame-like seal members;

cross electrodes which are formed on the first substrate member at positions of the adjacent cell regions which are outside the frame-like seal members and are close to each other via boundaries of the adjacent cell regions;

cross connecting portions connected to the second electrodes, wherein the cross connecting portions are formed on the second substrate member at positions of the adjacent cell regions which are outside the frame-like seal members, are close to each other via the boundaries of the adjacent cell regions, and correspond to the cross electrodes formed on the first substrate member; and

common cross members which are integrally formed, between the first and second substrate members at positions where the cross electrodes and the cross connecting portions of the adjacent cell regions oppose each other, wherein the common cross members extend across the boundaries of the adjacent cell regions, and are arranged to electrically connect the cross electrodes and the cross connecting portions of the respective cell regions.

2. An assembly according to claim 1, wherein each of the common sides is formed to extend across a boundary between adjacent cell regions and has a width that is wider than widths of remaining sides of the frame-like seal members.

3. An assembly according to claim 1, wherein the cell regions comprise screen areas surrounded by the frame-like seal members, respectively, and terminal array portions which are located outside the screen areas and on each of which a terminal electrode connecting to at least one of the first and second electrodes is arranged, and

wherein the common sides of the adjacent frame-like seal members are not provided at portions of the adjacent cell regions corresponding to the terminal array portions.

4. An assembly according to claim 1, wherein the cell regions form rectangles each including three boundaries along an outer shape of one frame-like seal member and a boundary where a terminal of a terminal array portion is arranged, and

wherein in each frame-like seal member, a side which is formed along at least one of the three boundaries of the corresponding cell region excluding the boundary where the terminal of the terminal array portion is arranged forms a common side together with a corresponding side of the frame-like seal member of an adjacent cell region.

5. An assembly according to claim 1, wherein, in each frame-like seal member, two sides which are formed along, of three boundaries of the corresponding cell region excluding a boundary where a terminal of a terminal array portion is arranged, two boundaries which oppose each other through the boundary where the terminal is arranged, form common sides together with corresponding sides of the frame-like seal members of adjacent cell regions.

6. An assembly according to claim 1, wherein, in each frame-like seal member, a filling hole to fill liquid crystals is formed in a side of the frame-like seal member provided along a boundary of the corresponding cell region which opposes a boundary of the cell region where a terminal of a terminal array portion is arranged, and two sides of the frame-like seal member which are formed along boundaries of the cell region excluding the boundary where the terminal is arranged and the boundary that opposes the boundary where the terminal is arranged form common sides together with corresponding sides of the frame-like seal members of adjacent cell regions.

7. An assembly according to claim 1, wherein at least one of:

(i) at least one set of the cross electrodes that are close to each other via a boundary between two adjacent cell regions, and (ii) at least one set of the cross connecting portions that are close to each other via boundary between two adjacent cell regions, is formed of a conductive film which is continuous so as to extend across the boundary between the two adjacent cell regions.

8. An assembly according to claim 1, wherein at least one of:

(i) at least one set of the cross electrodes that are close to each other via a boundary between two adjacent cell regions, and (ii) at least one set of the cross connecting portions that are close to each other via boundary between two adjacent cell regions, is formed to be symmetric about the boundary between the two adjacent cell regions.

9. A liquid crystal cell manufacturing method comprising:

forming a first substrate member on which at least first electrodes are formed in each of a plurality of cell regions, the cell regions being arranged to respectively correspond to liquid crystal cells and to be adjacent to each other;

forming a second substrate member on which, for each of the cell regions, at least a second electrode is formed to oppose the first electrodes formed in the cell region;

forming frame-like seal members, which define the cell regions, respectively, on at least one of a surface of the first substrate member where the first electrodes are formed and a surface of the second substrate member where the second electrodes are formed, such that adjacent frame-like seal members have common sides formed by continuosusly linking at least one side of each of the adjacent frame-like seal members to each other;

forming a cell assembly by adhering the first and second substrate members such that the surfaces of the first and second substrate members where the respective electrodes are formed oppose each other; and

separating the cell assembly into individual liquid crystal cells by segmenting the first substrate member, the second substrate member, and the seal members for the respective cell regions along perimeters of the cell regions, wherein each of the common sides is segmented along a segmentation line;

wherein the method further comprises;

forming first connection terminals on the surface of the first substrate member where the first electrodes are formed, at positions of the adjacent cell regions which are adjacent to each other via the segmentation lines of the adjacent cell regions;

forming second connection terminals on the surface of the second substrate member where the second electrodes are formed, at positions of the adjacent cell regions which are adjacent to each other via the segmentation lines of the adjacent cell regions to oppose the first connection terminals, wherein the second connection terminals are connected to the second electrodes and extend to positions which are outside the frame-like seal members; and

forming a common conductive cross member by coating, at least on two of the first connection terminals which are adjacent to each other via one of the segmentation lines or two of the second connection terminals which are adjacent to each other via one of the segmentation lines, to electrically connect the opposing first connection terminals and the second connection terminals, wherein the common conductive cross member is segmented along said one of the segmentation lines when separating the cell assembly into the individual liquid crystal cells.

10. A method according to claim 9, wherein the cell regions comprise screen areas surrounded by the frame-like seal members, respectively, and terminal array portions which are located outside the screen areas and on each of which terminal electrodes connecting to at least the second electrodes are arranged, and

wherein the common sides of the adjacent frame-like seal members are not provided at portions of the cell regions corresponding to the terminal array portions.

11. A method according to claim 9, wherein in each frame-like seal member, two sides which are formed along, of three boundaries of the corresponding cell region excluding a boundary where terminals of a terminal array portion are arranged, two boundaries which oppose each other through the boundary where the terminals are arranged, form common sides together with corresponding sides of the frame-like seal members of adjacent cell regions.

12. A method according to claim 9, wherein each of the frame-like seal members is formed to have a filling hole to fill liquid crystals in a side of the frame-like seal member provided along a boundary of the corresponding cell region which opposes a boundary of the cell region where terminals of a terminal array portion are arranged, and two sides of the frame like seal member which are formed along boundaries of the cell region, excluding the boundary where the terminals of the terminal array portion are arranged and the opposing boundary where the filling hole is formed, form common sides together with corresponding sides of the frame-like seal members of adjacent cell regions.

13. A method according to claim 9, wherein the frame-like seal members are formed on at least one of the surface of the first substrate member where the first electrodes are formed and the surface of the second substrate member where the second electrodes are formed, by coating of a seal material with a dispenser.

14. A method according to claim 9, wherein each set of the first connection terminals that are adjacent to each other via the segmentation line between two adjacent cell regions is formed from a conductive film which is continuous to extend across a boundary between the two adjacent cell regions.

15. A method according to claim 9, wherein each set of the first connection terminals that are adjacent to each other via the segmentation line between two adjacent cell regions is formed to be axi-symmetric about a boundary between the two adjacent cell regions.

16. A method according to claim 9, wherein the cross member is formed by coating with a dispenser on at least one of the surface of the first substrate member where the first electrodes are formed and the surface of the second substrate member where the second electrodes are formed.

17. A liquid crystal cell manufacturing method comprising:

forming first electrodes and terminals to form a terminal array portion where terminals respectively connecting to the first electrodes are arranged continuously in two perpendicular directions, for respective first substrate regions each of which corresponds to one liquid crystal cell, on a plate surface of a first substrate member including an area that provides liquid crystal cell substrates, the first electrodes being formed in respective screen areas, to display an image, of the first substrate regions;

forming a second electrode, which opposes the first electrodes formed in one of the first substrate regions on the first substrate member, for respective second substrate regions each of which corresponds to one liquid crystal cell, the second electrodes being arranged on a plate surface of a second substrate member including an area that provides liquid crystal cell substrates so as to correspond to the screen areas of the first substrate regions;

forming frame-like seal members, on at least one of the first and second substrate members, to surround the screen areas, respectively, the frame-like seal members having a common sides which are continuous between adjacent frame-like seal members to extend across boundaries between adjacent first substrate regions or second substrate regions;

arranging the first and second substrate members such that the second substrate regions oppose the screen areas of the first substrate regions, respectively, and bonding the first and second substrate members through the frame-like seal members; and

segmenting the bonded first and second substrate members along segmentation lines on boundaries of the first substrate regions and the second substrate regions and simultaneously segmenting the common sides of the frame-like seal members;

wherein the method further comprises;

forming first connection terminals on the surface of the first substrate member where the first electrodes are formed, at positions of adjacent first substrate regions which are adjacent to each other via the segmentation lines of the adjacent first substrate regions;

forming second connection terminals on the surface of the second substrate member where the second electrodes are formed, at positions of adjacent second substrate regions which are adjacent to each other via the segmentation lines of the adjacent second substrate regions to oppose the first connection terminals, wherein the second connection terminals are connected to the second electrodes and extend to positions which are outside the frame-like seal members; and

forming a common conductive cross member by coating, at least on two of the first connection terminals which are adjacent to each other via one of the segmentation lines or two of the second connection terminals which are adjacent to each other via one of the segmentation lines, to electrically connect the opposing first connection terminals and the second connection terminals, wherein the common conductive cross member is segmented along said one of the segmentation lines when separating the cell assembly into the individual liquid crystal cells.