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08/16/07 - USPTO Class 349 |  56 views | #20070188693 | Prev - Next | About this Page  349 rss/xml feed  monitor keywords

Drive ic and display device having the same

USPTO Application #: 20070188693
Title: Drive ic and display device having the same
Abstract: In a drive IC and a display device having the same, the drive IC includes a plurality of bumps disposed on a lower surface of the drive IC and aligned in a plurality of rows along an edge of the drive IC. The bumps aligned in different rows from each other are juxtaposed in a direction perpendicular to a direction in which the bumps are aligned. Accordingly, when the drive IC is mounted on a display panel using an anisotropic conductive film, the anisotropic conductive film may be smoothly flowed through a space defined by the bumps of the drive IC, thereby improving electric properties of the drive IC and display device. (end of abstract)



Agent: Cantor Colburn, LLP - Bloomfield, CT, US
Inventors: Seong-Yong HWANG, Sung-Chul KANG, Weon-Sik OH, Cheol-Yong JEONG, Jin-Suk LEE, Ju-Young YOON, Won-Gu CHO
USPTO Applicaton #: 20070188693 - Class: 349152000 (USPTO)

Drive ic and display device having the same description/claims


The Patent Description & Claims data below is from USPTO Patent Application 20070188693, Drive ic and display device having the same.

Brief Patent Description - Full Patent Description - Patent Application Claims
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CROSS-REFERENCE TO RELATED APPLICATION

[0001] This application relies for priority upon Korean Patent Application No. 2003-10819 filed on Feb. 20, 2003, the contents of which are herein incorporated by reference in its entirety.

BACKGROUND OF THE INVENTION

[0002] 1. Field of the Invention

[0003] The present invention relates to a drive IC (Integrated Circuit) and a display device having the same, and more particularly to a drive IC having an electrically improved reliability and a display device having the same.

[0004] 2. Description of the Related Art

[0005] Recently, electronic instruments, for example, such as a mobile communication terminal, a digital camera, a notebook computer, etc., include an image display device so as to display an image. As an image display device, a flat panel display device, representatively such as an LCD (Liquid Crystal Display) device, is mainly used.

[0006] The LCD device, generally, includes a drive IC mounted on an LCD panel thereof. Particularly, a mobile communication terminal needs an LCD device having low power consumption and slim-type small size.

[0007] The LCD device having the slim-type small size is driven by means of a drive IC so-called one chip IC. In recent, an LCD device to which a COG (Chip On Glass) manner is applied is broadly used. The COG manner is a method that a drive IC is directly mounted on an LCD panel.

[0008] In the LCD panel to which the COG manner is applied, an ACF (Anisotropic Conductive Film) including a resin with a conductive ball is positioned on a plurality of electrode pads formed on the LCD panel and the drive IC is compressed with the electrode pads. A plurality of bumps disposed under the drive IC is electrically connected to the electrode pads through the conductive ball.

[0009] The ACF is outwardly extruded from the drive IC due to compression of the drive IC while the drive IC is mounted on the LCD panel. However, the conductive ball is moved to an outside of the drive IC with the resin and stacked up on a peripheral area of the bumps by colliding with bumps.

[0010] As a result, the bumps on which the conductive ball is stacked up may be electrically shorted to adjacent bumps. Also, since an adhesive force between the bumps and the conductive ball is deteriorated, an electrical connection between the drive IC and the electric pads may be opened.

BRIEF SUMMARY OF THE INVENTION

[0011] The present invention provides a drive IC having an electrically improved reliability.

[0012] The present invention also provides a display device having the above drive IC.

[0013] In one aspect of the invention, a drive IC includes electrode terminals aligned in a plurality of columns along a first direction parallel to an edge line of a semiconductor substrate and aligned in a plurality of rows along a second direction perpendicular to the first direction, and bumps disposed on the electrode terminal.

[0014] In another aspect of the invention, a drive IC includes electrode terminals aligned in a plurality of columns along a first direction parallel to an edge line of a semiconductor substrate and bumps disposed on the electrode terminals. The electrode terminals include first electrode terminals aligned in a first column and second electrode terminals aligned in a second column adjacent to the first column. Distances between adjacent two first electrode terminals are uniform and the second electrode terminals are positioned at areas corresponding to areas between the first electrode terminals aligned in the first column.

[0015] Each of the bumps has a predetermined length extended in a second direction perpendicular to the first direction. The bumps include first bumps disposed on the first electrode terminals and second bumps disposed on the second electrode terminals. The second bumps are separated from the first bumps and the separated distance between the first and second bumps is greater than a half of the predetermined length.

[0016] In further aspect of the invention, a display device includes a display panel and a drive IC electrically connected to the display panel.

[0017] The display panel includes a display area on which a gate line, a data line perpendicular to the gate line and a plurality of pixels are formed and a peripheral area on which electrode pads extended from the gate and data lines are formed. The peripheral area is disposed adjacent to the display area.

[0018] The drive IC includes electrode terminals aligned in a plurality of columns along a first direction parallel to an edge line of a semiconductor substrate and aligned in a plurality of rows along a second direction perpendicular to the first direction and bumps disposed on the electrode terminal.

[0019] In further aspect of the invention, a display device includes a display panel and a drive IC electrically connected to the LCD panel.

[0020] The display panel includes a display area on which a gate line, a data line perpendicular to the gate line and a plurality of pixels are formed and a peripheral area on which electrode pads extended from the gate and data lines are formed. The peripheral area is disposed adjacent to the display area.

[0021] The drive IC includes electrode terminals aligned in a plurality of columns along a first direction parallel to an edge line of a semiconductor substrate and bumps disposed on the electrode terminals.

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Brief Patent Description - Full Patent Description - Patent Application Claims

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Driver module structure
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Curing method and apparatus
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Liquid crystal cells, elements and systems

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