Patent
Method for producing a liquid crystal panel
| العنوان: | Method for producing a liquid crystal panel |
|---|---|
| Patent Number: | 6,195,149 |
| تاريخ النشر: | February 27, 2001 |
| Appl. No: | 08/860,098 |
| Application Filed: | July 22, 1997 |
| مستخلص: | A method for producing a liquid crystal panel by forming a plurality of liquid crystal sealing-in areas between a transparent pair of large-area substrates and dividing the liquid crystal sealing-in areas into separate liquid crystal sealing-in areas. The method includes (A) forming transparent electrodes which form a plurality of liquid crystal panels on a surface of each of the large-area substrates, (B) forming seals, each of which surround the transparent electrode required to form one liquid crystal panel, on one of the large-area substrates in order to form liquid crystal injection openings, and forming liquid crystal injection openings in the seals, (C) bonding together the large-area substrates such that their transparent electrodes face each other, with the seals interposed therebetween, (D) removing a portion of one of the pair of large-area substrates such that the liquid crystal injection opening is exposed to the outside, (E) injecting liquid crystal into the liquid crystal sealing-in area through the liquid crystal injection opening exposed to the outside, and then sealing the liquid crystal injection opening with a sealing agent, and (F) dividing the pair of large-area substrates into separate panels after the liquid crystal injection. According to this method, liquid crystal injection can be performed without completely cutting the large-area liquid crystal panel so that the production steps are simplified. |
| Inventors: | Kodera, Takumi (Suwa, JPX); Gyota, Kozo (Suwa, JPX); Obata, Fumio (Suwa, JPX); Murata, Masami (Suwa, JPX) |
| Assignees: | Seiko Epson Corporation (Tokyo, JPX) |
| Claim: | What is claimed is |
| Claim: | 1. A method for producing a liquid crystal panel by forming a plurality of liquid crystal sealing-in areas between a pair of large-area substrates, at least one of said substrates being a light-transmitting substrate, and cutting said plurality of liquid crystal scaling-in areas into separate areas, said method comprising |
| Claim: | forming transparent electrodes which form a plurality of liquid crystal panels on a surface of each substrate of said pair of large-area substrates; |
| Claim: | forming a plurality of seals, each of which surround said transparent electrodes required to form one liquid crystal panel, on the electrode-formed surface of one of said pair of large-area substrates to form said plurality of liquid crystal sealing-in areas, and forming liquid crystal injection openings in each of said plurality of seals; |
| Claim: | bonding together said pair of large-area substrates such that said transparent electrodes of a first one of said pair of large-area substrate faces said transparent electrodes of a second one of said pairs of said large-area substrates, with said seals interposed between said substrates; |
| Claim: | removing a portion of one of said pair of large-area substrates bonded together such that at least one of said liquid crystal injection openings is exposed; |
| Claim: | injecting liquid crystal into said liquid crystal sealing-in area through at least one of said liquid crystal injection openings, and then scaling said liquid crystal injection opening; and |
| Claim: | dividing said pair of bonded large-area substrates into separate liquid crystal panels after the liquid crystal injection. |
| Claim: | 2. A method for producing a liquid crystal panel according to claim 1, further comprising forming an active element group, connected to said transparent electrodes for electrical conduction, on a surface of one of said pair of large-area substrates. |
| Claim: | 3. A method for producing a liquid crystal panel according to claim 1, wherein said pair of large-area substrates are glass substrates, and wherein said step of removing a portion of one of said pair of large-area substrates comprises forming a cut on a surface of one of said glass substrates, and cutting along said cut by applying a force to said cut, in order to remove a portion of one of said large-area substrates. |
| Claim: | 4. A method for producing a liquid crystal panel according to claim 3, wherein said step of removing a portion of one of said pair of large-area substrates comprises removing said portion from at least one of said large-area substrates, with a gap formed around said portion to be removed formed by said cutting. |
| Claim: | 5. A method for producing a liquid crystal panel according to claim 1, wherein said step of forming a plurality of seals comprises forming said plurality of seals such that said liquid crystal injection openings in said seals are arranged in straight lines, and wherein said step of removing a portion of one of said pair of large-area substrates comprises forming two linear cuts along a direction of arrangement of said plurality of liquid crystal injection openings disposed in straight-lines, and removing a long-and-narrow portion, bordered by said linear cuts, from one of said large-area substrates. |
| Claim: | 6. A method for producing a liquid crystal panel according to claim 5, wherein said step of removing a portion of one of said pair of large-area substrates comprises removing the long-and-narrow portion from said large-area substrate, while panel sections disposed on both sides of said long-and-narrow portion are shifted away from said long-and-narrow portion, and wherein said method further comprises hardening at least one of said plurality of seals after said step of removing a portion of one of said pair of large-area substrates. |
| Claim: | 7. A method for producing a liquid crystal panel according to claim 5, wherein said two linear surface cuts are formed such that said long-and-narrow portion tapers from narrow to wide from the inner side to the outer side of said portion. |
| Claim: | 8. A method for producing a liquid crystal panel according to claim 5, wherein said step of forming a plurality of seals comprises forming two or more rows of said plurality of seals arranged such that said liquid crystal injection openings are disposed in straight lines, with said liquid crystal openings of said seals adjacent to each other and of different rows, forming pairs of openings, facing each other. |
| Claim: | 9. A method for producing a liquid crystal panel according to claim 1, wherein said step of removing a portion of one of said pair of large-area substrates comprises removing a window-shaped portion from one of said pair of large-area substrates. |
| Claim: | 10. A method for producing a liquid crystal panel according to claim 9, wherein said step of forming a plurality of seals comprises forming two or more rows of said plurality of seals arranged such that said liquid crystal injection openings are disposed in straight lines, with said liquid crystal openings of said seals adjacent to each other and of different rows, forming pairs of openings, facing each other, and wherein said step of removing a portion of one of said pair of large-area substrates comprises cutting out and removing a window-shaped portion from one of said large-area substrates such that said liquid crystal injection openings forming a pair of facing openings are exposed to the outside at the same time. |
| Claim: | 11. A method for producing a liquid crystal panel by forming a plurality of liquid crystal sealing-in areas between a pair of large-area substrates, at least one of said substrates being a light-transmitting substrate, and dividing said plurality of liquid crystal sealing-in areas into separate areas, said method comprising |
| Claim: | forming transparent electrodes which form a plurality of liquid crystal panels and a connecting terminal connected thereto on a surface of each substrate of said pair of large-area substrates; |
| Claim: | forming a plurality of seals, each of which surround said transparent electrodes required to form one liquid crystal panel, on the electrode-formed surface of one of said pair of large-area substrates to form said plurality of liquid crystal scaling-in areas, forming liquid crystal injection openings in each of said plurality of seals, and forming connecting terminal sections around each of said liquid crystal sealing-in areas; |
| Claim: | bonding together said pair of large-area substrates such that said transparent electrodes of a first one of said pair of large-area substrate faces said transparent electrodes of a second of said pair of large-area substrates, with said seals interposed between said substrates; |
| Claim: | removing a portion of one of said pair of large-area substrates bonded together such that at least one of said liquid crystal injection openings and at least one of said connecting terminal sections are exposed; |
| Claim: | injecting liquid crystal into said liquid crystal sealing-in area through at least one of said liquid crystal injection opening, and then sealing said liquid crystal injection opening; and |
| Claim: | 12. A method for producing a liquid crystal panel according to claim 11, wherein said step of removing a portion of one of said pair of large-area substrates comprises two separate steps of removing a portion of said large-area substrate such that at least one of said liquid crystal injection openings is exposed to the outside, and removing a portion of said large-area substrate such that at least one of said connecting terminal sections is exposed to the outside. |
| Claim: | 13. A method for producing a liquid crystal panel according to claim 11, further comprising performing an electrical test through said connecting terminal section exposed to the outside, wherein said electrical test is performed between said injecting of said liquid crystal and said dividing of said pair of bonded large-area substrates. |
| Claim: | 14. A method for producing a liquid crystal panel according to claim 11, wherein said step of removing a portion of one of said pair of large-area substrates comprises removing long-and-narrow portions of said pair of large-area substrates such that said long-and-narrow portion of said one large-area substrate intersects said long-and-narrow portion of said other large-area substrate. |
| Claim: | 15. A method for producing a liquid crystal panel according to claim 11, wherein said pair of large-area substrates are glass substrates, and wherein said step of removing a portion of one of said pair of large-area substrates comprises forming a cut in a surface of one of said glass substrates, and cutting along said cut by applying a force to said cut, whereby a portion of one of said large-area substrates is removed. |
| Claim: | 16. A method for producing a liquid crystal panel according to claim 15, wherein said step of removing a portion of one of said pair of large-area substrates comprises removing said portion from said large-area substrate, with a gap formed around said portion to be removed formed by said cutting. |
| Claim: | 17. A method for producing a liquid crystal panel according to claim 15, wherein a cut is formed such that said long-and-narrow portion tapers from narrow to wide from the inner side to the outer side of said portion. |
| Claim: | 18. A method for producing a liquid crystal panel according to claim 13, wherein said electrical test is performed after connection of at least one electrical member to said connecting terminal section. |
| Current U.S. Class: | 349/187; 349/189; 349/190 |
| Current International Class: | G02F 11339; G02F 11341 |
| Patent References Cited: | 4094058 June 1978 Yasutake et al. 5459597 October 1995 Yamamoto et al. 5492582 February 1996 Ide et al. 5629787 May 1997 Tsubota et al. |
| Primary Examiner: | Sikes, William L. |
| Assistant Examiner: | Duong, Tai V. |
| Attorney, Agent or Firm: | Oliff & Berridge, PLC |
| رقم الانضمام: | edspgr.06195149 |
| قاعدة البيانات: | USPTO Patent Grants |
| الوصف غير متاح. |