Liquid crystal display device having video signal driving circuit mounted on one side and housing

• US 5,640,216 A
• Filed: 04/07/1995
• Issued: 06/17/1997
• Est. Priority Date: 04/13/1994
• Status: Expired due to Term

• Current Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Original Assignee: Hitachi Device Engineering Co., Ltd. (Hitachi, Ltd.), Hitachi, Ltd.
• Inventors: Suzuki, Masahiko, Kobayashi, Naoto, Imajo, Yoshihiro, Kondo, Hironori, Yarita, Katsuhiko, Toriyama, Yoshio, Hasegawa, Kaoru
• Primary Examiner(s): Sikes, William L.
• Assistant Examiner(s): Malinowski, Walter J.
• Application Number:
  US08/419,000
• Time in Patent Office: 802 Days
• Field of Search: 359/83, 359/69, 359/82, 359/88, 359/48, 359/49, 359/50, 361/681, 345/206
• US Class Current: 349/58
• CPC Class Codes: G02F 1/133308 Support structures for LCD panels, e.g. frames or bezels
• CPC Class Codes: G02F 1/133328 Segmented frames
• 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 2201/465 Snap -fit
• CPC Class Codes: H05K 1/141 One or more single auxiliary printed circuits mounted on a main printed circuit, e.g. modules, adapters H05K1/142 and H05K1/147 take precedence
• CPC Class Codes: H05K 3/36 Assembling printed circuits with other printed circuits H05K7/142 takes precedence
• CPC Class Codes: H05K 3/361 Assembling flexible printed circuits with other printed circuits

Abstract

Herein disclosed are a liquid crystal display device and a data processing device, which can have their frame portions reduced in area to reduce the size and weight by extracting the terminals of video signals to only one side of a liquid crystal display panel and by arranging a video signal line driving circuit substrate to be connected with the terminals, only at one side of the display panel.

Claims

1. A liquid crystal display device comprising:

a liquid crystal display panel;

in which first and second insulating substrates are superposed at a predetermined gap such that their faces respectively formed with transparent pixel electrodes and an orientation film are opposed to each other, in which said two substrates are adhered to each other through a seal member applied in a frame shape on the edge portions between said two substrates while sealing a liquid crystal in said seal member between said two substrates, and in which a plurality of scanning signal lines and video signal lines arrayed on said opposed face of said first insulating substrate have their individual terminals disposed outside of said seal member;

wherein a video signal line driving circuit substrate is arranged on only one of the longer sides of said display panel and is connected with the terminals of said video signal lines, wherein no circuit substrate is arranged at the other side of said display panel which is arranged with said video signal line driving circuit substrate; and

wherein the liquid crystal display panel includes two sides extending perpendicular to the side having the video signal line driving circuit substrate arranged thereat, one of the two perpendicular sides having a scanning signal line driving circuit substrate arranged thereat and the other of the two perpendicular sides having a circuit substrate including a power source circuit and a conversion circuit arranged thereat.

2. A data processing device comprising:

said video signal line driving circuit substrate is arranged above the display of a display unit when said liquid crystal display device according to claim 1 is assembled as said display unit in a predetermined data processing device.

3. A liquid crystal display device comprising:

a liquid crystal display panel sealing a liquid crystal between two superposed transparent glass substrates,

a plurality of circuit substrates arranged at the two, three or four sides of the peripheral portion of said liquid crystal display panel,

a light guide plate for a back light arranged below said liquid crystal display panel,

a metallic shield casing for accommodating said liquid crystal display panel and said circuit substrates, and

a mold casing monolithically molded for accommodating said back light, said metallic shield casing and said mold casing being united by fitting their individual fitting members,

wherein said liquid crystal display panel is formed with a single plate portion so that said liquid crystal display panel and said light guide plate are held through an elastic member between said single plate portion and said light guide plate and fixed in said device,

a fluorescent tube arranged in the vicinity of at least one side face of said light guide plate,

at least one optical sheet arranged on the upper face of said light guide plate,

wherein at least one of the four sides of said at least one optical sheet has its end portion protruded and placed on the side wall of said mold casing, an elastic member is interposed between said optical sheet on said side wall and the lower face of an upper transparent glass substrate of said liquid crystal display panel, said shield casing and said mold casing are united by fitting their individual portions.

4. A liquid crystal display device comprising:

a liquid crystal display panel,

a plurality of circuit substrates arranged on the outer circumferential portion of said liquid crystal display panel,

a light guide plate arranged below said liquid crystal display panel,

a fluorescent tube arranged on at least one side face of said light guide plate,

a metallic shield casing for accommodating said liquid crystal display panel and said circuit substrate together, and

a mold casing monolithically molded for accommodating said light guide plate and said fluorescent tube,

wherein two cables having their individual one ends connected with the two ends of said fluorescent tube are accommodated in a groove which is made integral with the side wall of said mold casing, and

wherein said mold casing is notched at a portion corresponding to an exothermic portion mounted on said circuit substrates.

5. A liquid crystal display device comprising:

a liquid crystal display panel,

a plurality of circuit substrates arranged on the outer circumferential portion of said liquid crystal display panel,

a light guide plate arranged below said liquid crystal display panel,

a fluorescent tube arranged on at least one side face of said light guide plate,

a metallic shield casing for accommodating said liquid crystal display panel and said circuit substrates together,

a mold casing monolithically molded for accommodating said light guide plate and said fluorescent tube,

wherein two cables having their individual one ends connected with the two ends of said fluorescent tube are accommodated in a groove which is made integral with the side wall of said mold casing, and

wherein said mold casing is notched at a portion corresponding to an exothermic portion mounted on said circuit substrates, and

a hybrid integrated circuit formed by hybridly integrating a portion of a sub-circuit is packaged in at least one of said circuit substrates.