Display device comprising a flexible board including a first wiring portion that is narrower than a second wiring portion and wherein the second wiring portion does not overlap a terminal portion
View Patent ↗Provided is a display device, including: a display panel which includes a thin film transistor substrate (SUB 1 ) on which a terminal portion including a plurality of terminals (TR) is provided; and a drive circuit connected to the terminal portion, in which: the drive circuit includes: a flexible board (FB); and a semiconductor chip mounted on the flexible board; the flexible board (FB) includes a plurality of wirings (La) for connecting the semiconductor chip and the plurality of terminals (TR), respectively; and the plurality of wirings (La) each include: a first wiring portion (La 1 ) which overlaps a corresponding one of the plurality of terminals (TR); and a second wiring portion (La 2 ) which is positioned between the first wiring portion (La 1 ) and the semiconductor chip, the first wiring portion (La 1 ) being narrower than the second wiring portion (La 2 ).
1. A display device, comprising:
a display panel which comprises a thin film transistor substrate on which a terminal portion including a plurality of terminals is provided, the plurality of terminals being disposed at a distance from an edge portion of the thin film transistor substrate on an inner side of the thin film transistor substrate; and
a drive circuit connected to the terminal portion, wherein:
the drive circuit comprises:
a flexible board; and
a semiconductor chip mounted on the flexible board;
the flexible board comprises a plurality of wirings for connecting the semiconductor chip and the plurality of terminals, respectively; and
the plurality of wirings each comprise:
a first wiring portion which overlaps a corresponding one of the plurality of terminals; and
a second wiring portion which is positioned between the first wiring portion and the semiconductor chip,
wherein the second wiring portion has a length greater than its width,
the first wiring portion is narrower than the second wiring portion,
the second wiring portion overlaps the edge portion of the thin film transistor substrate, overlaps a part of the region between the edge portion of the thin film transistor substrate and the terminals, but does not overlap the terminal portion.
2. A display device, comprising:
a display panel which comprises a thin film transistor substrate on which a terminal portion including a plurality of terminals is provided; and
a drive circuit connected to the terminal portion, wherein:
the drive circuit comprises:
a flexible board; and
a semiconductor chip mounted on the flexible board;
the flexible board comprises a plurality of wirings for connecting the semiconductor chip and the plurality of terminals, respectively; and
the plurality of wirings each comprise:
a first wiring portion which overlaps a corresponding one of the plurality of terminals; and
a second wiring portion which is positioned between the first wiring portion and the semiconductor chip,
wherein the second wiring portion has a length greater than its width,
the first wiring portion is narrower than the second wiring portion,
a part of the flexible board overlaps a part of the thin film transistor substrate including the terminal portion;
the plurality of wirings each further comprise a third wiring portion which is positioned between the first wiring portion and the second wiring portion; and
the third wiring portion overlaps a region between the edge portion of the thin film transistor substrate and the corresponding one of the plurality of terminals, and is gradually increased in line width as being closer to the second wiring portion.
3. The display device according to claim 1 , wherein:
the plurality of terminals are arranged with a predetermined pitch;
the plurality of wirings are each formed into a rectangular cross section; and
the first wiring portion has a line width which is 0.3 times or more and 0.4 times or less of the predetermined pitch.
4. The display device according to claim 1 , wherein:
the plurality of terminals are arranged along an edge portion of the thin film transistor substrate with a predetermined pitch; and
the plurality of wirings each intersect substantially perpendicularly with the edge portion of the thin film transistor substrate, and overlap the plurality of terminals, respectively.
5. The display device according to claim 1 , wherein:
the second wiring portion extends from the semiconductor chip towards the first wiring portion.
6. A display device, comprising:
a display panel which comprises a thin film transistor substrate on which a terminal portion including a plurality of terminals is provided; and
a drive circuit connected to the terminal portion, wherein:
the drive circuit comprises:
a flexible board; and
a semiconductor chip mounted on the flexible board;
the flexible board comprises a plurality of wirings for connecting the semiconductor chip and the plurality of terminals, respectively; and
the plurality of wirings each comprise:
a first wiring portion which overlaps a corresponding one of the plurality of terminals; and
a second wiring portion which is positioned between the first wiring portion and the semiconductor chip; and
a third wiring portion which is positioned between the first wiring portion and the second wiring portion,
wherein the third wiring portion overlaps a region between an edge portion of the thin film transistor substrate and the corresponding one of the plurality of terminals, and is gradually increased in line width as being closer to the second wiring portion.
7. The display device according to claim 6 , wherein:
the second wiring portion extends from the semiconductor chip to the third wiring portion.
8. The display device according to claim 1 , wherein the plurality of wirings each further comprise a third wiring portion which is positioned between the first wiring portion and the second wiring portion; and the third wiring portion overlaps a portion of the region between the edge portion of the thin film transistor substrate and the corresponding one of the plurality of terminals.