Liquid crystal display device

• US 20080074604A1
• Filed: 11/07/2007
• Published: 03/27/2008
• Est. Priority Date: 12/18/2000
• Status: Active Grant

• Current Assignee: Japan Display Incorporated
• Original Assignee: Hitachi, Ltd.
• Inventors: Iwakabe, Yasushi, Yanagawa, Kazuhiko, Wakagi, Masatoshi, Nakayoshi, Yoshiaki
• Granted Patent: US 7,542,121 B2
• Time in Patent Office: Days
• US Class Current: 349/153
• CPC Class Codes: G02F 1/13306 Circuit arrangements or driving methods for the control of single liquid crystal cells G02F1/132, G02F1/133382 take precedence
• CPC Class Codes: G02F 1/1333 Constructional arrangements; Manufacturing methodsG02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133305 Flexible substrates, e.g. plastics, organic film
• CPC Class Codes: G02F 1/133334 Electromagnetic shields
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/133354 Arrangements for aligning or assembling substrates
• CPC Class Codes: G02F 1/133512 Light shielding layers, e.g. black matrix G02F1/136209 takes precedence
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/13398 Spacer materials; Spacer properties
• CPC Class Codes: G02F 1/1341 Filling or closing of cells
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/136286 Wiring, e.g. gate line, drain line
• CPC Class Codes: G02F 1/13629 Multilayer wirings
• CPC Class Codes: G02F 1/136295 Materials; Compositions; Manufacture processes
• CPC Class Codes: G02F 1/1368 in which the switching element is a three-electrode device G02F1/136277 takes precedence
• CPC Class Codes: G02F 2201/503 Arrangements improving the resistance to shock
• CPC Class Codes: G02F 2202/02 organic material

Abstract

There is provided a liquid crystal display device in which light leaks near spacers are prevented. The liquid crystal display device controls the optical transmissivity of a liquid crystal layer interposed between substrates disposed in opposition to each other, by means of an electric field generated in the layer-thickness direction of the liquid crystal layer, includes spacers formed on a liquid-crystal-side surface of one of the substrates, signal lines formed on a liquid-crystal-side surface of the other substrate, an insulating film formed to cover the signal lines, and electrodes formed on the upper surface of the insulating film, each of which serves as one electrode contributing to control of the optical transmissivity of the liquid crystal layer. Each of the spacers has a vertex surface disposed in opposition to any of the signal lines, and a portion of each of the electrodes is extended to the upper surface of a corresponding one of the signal lines and the extended portion is opposed to a part of the vertex surface of a spacer disposed in opposition to the corresponding one of the signal lines.

Claims

1. A liquid crystal display device comprising:

substrates disposed in opposition to each other with a liquid crystal interposed therebetween;

driver chips mounted on one of the substrates in an area other than an area in which the liquid crystal is sealed;

the driver chips being electrically connected to signal lines formed to run in an area in which the liquid crystal is sealed, with a stacked structure being interposed between the driver chips and the signal lines, an inorganic material layer and an organic material layer being stacked in that order in the stacked structure; and

an alignment mark formed in a layer underlying the stacked structure in the vicinity of each of the driver chips,

the inorganic material layer which covers the alignment mark being left in a shape which is coaxially coincident with the alignment mark and is similar to, but larger than, the alignment mark, the vicinity of the inorganic material layer being removed.

2. A liquid crystal display device according to claim 1, wherein the organic material layer is removed from the alignment mark and the periphery thereof.

3. A liquid crystal display device comprising:

substrates disposed in opposition to each other with a liquid crystal interposed therebetween,

driver chips mounted on one of the substrates in an area other than an area in which the liquid crystal is sealed;

the driver chips being electrically connected to signal lines formed to run in an area in which the liquid crystal is sealed, with a stacked structure being interposed between the driver chips and the signal lines, an inorganic material layer and an organic material layer being stacked in that order in the stacked structure; and

an alignment mark formed in a layer underlying the stacked structure in the vicinity of each of the driver chips;

the inorganic material layer which covers the alignment mark being moved in a region over the alignment mark as well as in the vicinity of the region.

4. A liquid crystal display device comprising:

substrates disposed in opposition to each other with a liquid crystal interposed therebetween;

driver chips mounted on one of the substrates in an area other than an area in which the liquid crystal is sealed;

the driver chips being electrically connected to signal lines formed to run in an area in which the liquid crystal is sealed, with a stacked structure being interposed between the driver chips and the signal lines, an inorganic material layer and an organic material layer being stacked in that order in the stacked structure; and

an alignment mark formed in a layer underlying the stacked structure in the vicinity of each of the driver chips;

the inorganic material layer which covers the alignment mark being moved in a region over the alignment mark as well as in the vicinity of the region.