CROSS-REFERENCE TO RELATED APPLICATION

This U.S. non-provisional patent application claims priority under 35 U.S.C. § 119 to Korean Patent Application No. 10-2020-0015826, filed on Feb. 10, 2020, the disclosure of which is incorporated by reference herein in its entirety.

TECHNICAL FIELD

The present disclosure relates to a display apparatus, and more particularly, to a display apparatus having a flexible circuit board.

DISCUSSION OF THE RELATED ART

In a display apparatus, a circuit board is connected to a display panel after the display panel is manufactured. For example, a tape automated bonding (TAB) mounting method bonds a flexible circuit board to the display panel by using an anisotropic conductive film (ACF).

SUMMARY

The inventive concept is not limited to the concept described above, and other concepts not described will be apparently understood by those skilled in the art from the following description.

According to an exemplary embodiment of the inventive concept, a display apparatus includes a flexible circuit board including a plurality of first substrate pads arranged in a first direction and a plurality of second substrate pads arranged in the first direction. The plurality of second substrate pads may be spaced apart from the plurality of first substrate pads in a second direction crossing the first direction, and each of the plurality of second substrate pads is disposed alternately to each of the plurality of first substrate pads; a main circuit board connected to the flexible circuit board; and a display panel including a plurality of first display pads and a plurality of second display pads. The plurality of first display pads may be connected to the main circuit board through the flexible circuit board and each of the plurality of first display pads may at least partially overlap corresponding substrate pad of the plurality of first substrate pads, respectively, and each of the plurality of second display pads may at least partially overlap corresponding substrate pad of the plurality of second substrate pads, respectively. Widths of the plurality of first substrate pads and the plurality of second substrate pads in the first direction may increase by an equivalent interval in a direction away from a central axis of the flexible circuit board along the first direction, and spaced distances between neighboring display pads of the plurality of first display pads in the first direction may increase by an equivalent interval in the direction away from the central axis along the first direction, and spaced distances between neighboring display pads of the plurality of second display pads in the first direction may increase by the equivalent interval in the direction away from the central axis along the first direction.

In an embodiment of the inventive concept, width of an area in which each of the plurality of first display pads overlaps corresponding substrate pad of the plurality of first substrate pads may decrease in the direction away from the central axis along the first direction, and in the first direction, width of an area in which each of the plurality of second display pads overlaps corresponding second substrate pad of the plurality of second substrate pads may decrease in the direction away from the central axis along the first direction.

In an embodiment of the inventive concept, in the first direction, widths of the plurality of first substrate pads and the plurality of second substrate pads may be symmetric with respect to the central axis of the flexible circuit board.

In an embodiment of the inventive concept, spaced distances between neighboring substrate pads of the plurality of first substrate pads may decrease in the direction away from the central axis along the first direction, and spaced distances between neighboring substrate pads of the plurality of second substrate pads may decrease in the direction away from the central axis along the first direction.

In an embodiment of the inventive concept, in the first direction, widths of the plurality of first display pads and the plurality of second display pads may be the same as each other.

In an embodiment of the inventive concept, in the first direction, differences between widths of neighboring substrate pads of the plurality of first substrate pads may be the same as each other, and in the first direction, differences between widths of neighboring substrate pads of the plurality of second substrate pads may be the same as each other.

In an embodiment of the inventive concept, each of the plurality of first display pads may have a same width in the first direction, and each of the plurality of second display pads may have a same width in the first direction.

In an embodiment of the inventive concept, the flexible circuit board may include an insulation layer, a plurality of substrate signal lines disposed on the insulation layer, and a solder resist layer in which openings configured to expose a portion of the plurality of substrate signal lines are disposed. Each of the plurality of substrate signal lines may be connected to corresponding substrate pad of the plurality of first substrate pads or corresponding substrate pad of the plurality of second substrate pads through corresponding openings.

In an embodiment of the inventive concept, a distance between a substrate signal line of the plurality of substrate signal lines and a display pad adjacent thereto decreases in the direction away from the central axis along the first direction.

In an embodiment of the inventive concept, each of the plurality of first substrate pads may be connected to corresponding display pad of the plurality of first display pads by an anisotropic conductive film, and each of the plurality of second substrate pads may be connected to corresponding display pad of the plurality of second display pads by another anisotropic conductive film.

According to an exemplary embodiment of the inventive concept, a display apparatus includes a flexible circuit board including a plurality of first substrate pads arranged in a first direction and a plurality of second substrate pads arranged in the first direction, wherein the plurality of second substrate pads is spaced apart from the plurality of first substrate pads in a second direction crossing the first direction, and each of the plurality of second substrate pads is disposed alternately to each of the plurality of first substrate pads; a main circuit board connected to the flexible circuit board; and a display panel including a plurality of first display pads and a plurality of second display pads, where the plurality of first display pads may be connected to the main circuit board through the flexible circuit board and each of the plurality of first display pads may at least partially overlap corresponding substrate pad of the plurality of first substrate pads, respectively, and each of the plurality of second display pads may at least partially overlap corresponding substrate pad of the plurality of second substrate pads, respectively. In the first direction, width of an area in which each of the plurality of first display pads overlaps the corresponding substrate pad of the plurality of first substrate pads, respectively, may decrease in a direction away from a central axis of the flexible circuit board along the first direction, and in the first direction, width of an area in which each of the plurality of second display pads overlaps the corresponding substrate pad of the plurality of second substrate pads, respectively, may decrease in the direction away from the central axis of the flexible circuit board along the first direction.

In an embodiment of the inventive concept, in the first direction, widths of the plurality of first substrate pads and the plurality of second substrate pads may increase by an equivalent interval in the direction away from the central axis of the flexible circuit board along the first direction.

In an embodiment of the inventive concept, in the first direction, widths of the plurality of first substrate pads and the plurality of second substrate pads may be symmetric with respect to the central axis of the flexible circuit board.

In an embodiment of the inventive concept, spaced distances between neighboring substrate pads of the plurality of first substrate pads may decrease in the direction away from the central axis along the first direction, and spaced distances between neighboring substrate pads of the plurality of second substrate pads may decrease in the direction away from the central axis along the first direction.

In an embodiment of the inventive concept, in the first direction, spaced distances between neighboring display pads of the plurality of first display pads may increase by an equivalent interval in a direction away from the central axis along the first direction, and in the first direction, spaced distances between neighboring display pads of the plurality of second display pads may increase by the equivalent interval in a direction away from the central axis along the first direction.

In an embodiment of the inventive concept, in the first direction, differences between widths of neighboring substrate pads of the plurality of first substrate pads may be the same as each other, and in the first direction, differences between widths of neighboring substrate pads of the plurality of second substrate pads may be the same as each other.

In an embodiment of the inventive concept, each of the plurality of first display pads may have a same width in the first direction, and each of the plurality of second display pads may have a same width in the first direction.

In an embodiment of the inventive concept, the flexible circuit board may include an insulation layer, a plurality of substrate signal lines disposed on the insulation layer, and a solder resist layer in which openings configured to expose a portion of the plurality of substrate signal lines are disposed. Each of the plurality of substrate signal lines may be connected to corresponding substrate pad of the plurality of first substrate pads or corresponding substrate pad of the plurality of second substrate pads through corresponding openings.

In an embodiment of the inventive concept, a distance between a substrate signal line and a display pad adjacent thereto may decrease in the direction away from the central axis along the first direction.

In an embodiment of the inventive concept, each of the plurality of first substrate pads is connected to corresponding display pad of the plurality of first display pads by an anisotropic conductive film, and each of the plurality of second substrate pads may be connected to corresponding display pad of the plurality of second display pads by another anisotropic conductive film.

