# US 7,746,439 B2 · Mounting film for liquid crystal display drive chip and method for manufacturing the same > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 7,746,439 B2 - Document ID: US7746439B2 - Status: Granted - Kind: B2 - Application number: 11/871,868 - Filed: 2007-10-12 - Published: 2008-04-17 - Granted: 2010-06-29 - Earliest claimed: 2006-10-16 - Assignees: InfoVision Optoelectronics Holdings Limited - Inventors: Akifumi Kohno - Web page: https://patentgrep.com/patent/US7746439B2 ## CPC - H05K 1/028: {Bending or folding regions of flexible printed circuits (H05K1/0283 takes precedence)} - G02F 1/13452: {Conductors connecting driver circuitry and terminals of panels} - H05K 1/148: {Arrangements of two or more hingeably connected rigid printed circuit boards, i.e. connected by flexible means} - H05K 2201/09063: Holes or slots in insulating substrate not used for electrical connections - H05K 2201/10681: Tape Carrier Package [TCP]; Flexible sheet connector - H05K: PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS - G02F: OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS ## Abstract The present invention provides a mounting film for a liquid crystal display drive chip and a method for manufacturing the same. The mounting film is provided with a slit cut from a side edge thereof, or provided with a weakened line for forming the slit. When a distance between a liquid crystal display panel and a control circuit substrate of the liquid crystal display unit is un-uniform, the opening degree of the slit is variable accordingly to accommodate variations in the distance. Such a COF mounting film for a liquid crystal display drive chip may be generally used even though a distance between the liquid crystal display panel and the control circuit substrate varies slightly. Therefore, the manufacturing cost of the liquid crystal display unit may be reduced. ## Claims ### Claim 1 A mounting film for a liquid crystal drive chip, wherein the mounting film is provided with a slit at a side edge thereof; and when a distance between a liquid crystal display panel and a control circuit substrate of the liquid crystal display unit is un-uniform, the opening degree of the slit is variable accordingly to accommodate variations in the distance. ### Claim 2 (depends on 1) The mounting film according to claim 1, wherein the mounting film is rectangular, and the slit is provided on either of the two side edges, which are arranged between the liquid crystal display panel and the control circuit substrate, of the rectangular mounting film. ### Claim 3 (depends on 2) The mounting film according to claim 2, wherein a circular through hole is formed at the tip of the slit. ### Claim 4 (depends on 1) The mounting film according to claim 1, wherein the slit is configured to be substantially parallel to an engaging side edge of the mounting film with the liquid crystal display panel or the control circuit substrate. ### Claim 5 (depends on 1) The mounting film according to claim 1, wherein a region around the slit is coated with solder resist and/or provided with dummy wirings to optimize the slit. ### Claim 6 A mounting film for a liquid crystal drive chip, wherein the mounting film is provided with a weakened line; when forces are applied to the mounting film, a slit will be formed in the mounting film along the weakened line, and when a distance between a liquid crystal display panel and a control circuit substrate of the liquid crystal display unit is un-uniform, the opening degree of the slit is variable accordingly to accommodate variations in the distance. ### Claim 7 (depends on 6) The mounting film according to claim 6, wherein the mounting film is rectangular, and one end of the weakened line is provided on either of the two side edges, which are arranged between the liquid crystal display panel and the control circuit substrate, of the rectangular mounting film. ### Claim 8 (depends on 6) The mounting film according to claim 6, wherein a circular through hole is formed at the tip of weakened line. ### Claim 9 (depends on 6) The mounting film according to claim 6, wherein the weakened line is configured to be substantially parallel to an engaging side edge of the mounting film with the liquid crystal display panel or the control circuit substrate. ### Claim 10 (depends on 6) The mounting film according to claim 6, wherein a region around the weakened line is coated with solder resist and/or provided with dummy wirings to optimize the slit formed along the weakened line. ### Claim 11 A mounting film for a liquid crystal drive chip, having a substantial rectangular shape with a pair of opposite longitudinal edges and a pair of opposite latitudinal edges, the film comprising: a pair of opposite interface regions located near to the opposite longitudinal edges, respectively; a region for mounting on the liquid crystal drive chip; and a wiring region for electrically connecting the liquid crystal drive chip and the interface regions; wherein a pair of slits or weakened lines are provided at the opposite latitudinal edges respectively and outside of the interface regions and the wiring region, an extending direction of the slits or weakened lines is substantially parallel to the longitudinal edges, and wherein when applying a moderate force on the film along a longitudinal direction, a length of the film in the longitudinal direction is variable due to the opening of the slits or the weakened lines being broken to form the slits. ### Claim 12 A mounting film for a liquid crystal drive chip, having a substantial rectangular shape with a pair of opposite longitudinal edges and a pair of opposite latitudinal edges, the film comprising: a pair of opposite interface regions located near to the opposite longitudinal edges, respectively; a region for mounting on the liquid crystal drive chip; and a wiring region for electrically connecting the liquid crystal drive chip and the interface regions; wherein a pair of slits or weakened lines are provided at the opposite latitudinal edges respectively and outside of the interface regions and the wiring region, an extending direction of the slits or weakened lines is substantially parallel to the longitudinal edges, and wherein a through hole is formed at the tip of each slit or weakened line.