Connecting structure for connecting a liquid crystal display and a flexible flat cable

• US 4,842,373 A
• Filed: 03/17/1988
• Issued: 06/27/1989
• Est. Priority Date: 06/15/1987
• Status: Expired due to Term

• Current Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Original Assignee: ALPS Electric Company Limited (Alps Alpine Co., Ltd.)
• Inventors: Yamanashi, Fumiaki, Tomofuji, Makoto
• Primary Examiner(s): Miller, Stanley D.
• Assistant Examiner(s): Mai, Huy Kim
• Application Number:
  US07/170,917
• Time in Patent Office: 467 Days
• Field of Search: 350/336, 350/343, 350/334, 350/333, 350/342, 340/765
• US Class Current: 349/150
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: H05K 2201/09063 Holes or slots in insulating substrate not used for electrical connections
• CPC Class Codes: H05K 2201/10977 Encapsulated connections applying non-metallic protective coatings for encapsulating mounted components H05K3/284
• CPC Class Codes: H05K 3/284 for encapsulating mounted components H05K1/185 takes precedence
• CPC Class Codes: H05K 3/363 by soldering

Abstract

A connecting structure for connecting a liquid crystal display and a flexible flat cable by soldering electrode terminals formed over the lower glass substrate of the liquid crystal display and connecting electrodes formed over the surface of the free end of the flexible flat cable, and by solidifying the junction of the liquid crystal display and the flexible flat cable with a resin. Through holes are formed in the free end of the flexible flat cable between the connecting electrodes at an appropriate pitch so that the through holes extend lengthwise across the end of the lower glass substrate when the flexible flat cable is put in place on the lower glass substrate. A resin applied to the upper surface of the flexible flat cable spreads over the upper surface of the flexible flat cable near the upper glass substrate of the liquid crystal display and the end surface of the upper glass substrate, flows through the through holes to the backside of the flexible flat cable, and spreads over part of the lower surface of the flexible flat cable near the end of the lower glass substrate and over the end surface of the lower glass substrate. Thus, the resin can be spread over the upper and lower surfaces of the flexible flat cable and over the respective end surfaces of the upper and lower glass substrates through a single resin applying process.

Claims

1. A connecting structure for connecting a liquid crystal display having a lower glass substrate with a free end with electrode terminals formed thereon, to a flexible flat cable having connecting electrodes formed thereon, said electrode terminals and said connecting terminals being joined together by a solder layer and forming a junction, said junction being covered by a resin;

wherein the improvement comprises through holes formed in said flexible flat cable between said connecting electrodes such that said through holes extend from the surface of said lower glass substrate to an area beyond said free end of said lower glass substrate when said flexible flat cable is put in place on said lower glass substrate, and said through holes allow a resin applied to an upper surface of said flexible flat cable to flow therethrough to a lower surface thereof wherein said resin spreads over said lower surface of said flexible flat cable and further spreads over said free end of said lower glass substrate.