CROSS-REFERENCE TO RELATED APPLICATION

This application claims priority to and the benefit of Korean Patent Application No. 10-2019-0038044 filed in the Korean Intellectual Property Office on Apr. 1, 2019, the entire contents of which are incorporated herein by reference.

BACKGROUND

1. Field

Some example embodiments of the present disclosure relate to a display device, a photomask, and a manufacturing method of a display device.

2. Description of the Related Art

Display devices such as organic light emitting diode displays and liquid crystal display have become widely used. In general, a display device includes a plurality of pixels, which are units for displaying an image, and a driving unit. The driving unit includes a data driver for applying a data voltage to the pixels, and a gate driver for applying a gate signal for controlling the transfer of the data voltage.

The gate driver and the data driver may be mounted on a printed circuit board (PCB) in the form of a chip, to be connected to the display panel. Alternatively, in the case of a gate driver which does not require high mobility of a channel of a thin film transistor, it may be integrated on a display panel without forming it as a separate chip.

The above information disclosed in this Background section is only for enhancement of understanding of the background of the invention and therefore it may contain information that does not constitute prior art.

SUMMARY

Aspects of some example embodiments may include a display device and a manufacturing method of a display device in which a dead space is minimized or reduced and luminance is relatively uniform throughout a display area.

Aspects of some example embodiments may include a photomask that can prevent or reduce defects of open-circuits due to disconnection of fan-out wires or short-circuits between adjacent fan-out wires during fan-out wiring patterning.

According to some example embodiments, a display device includes: a substrate including a display area and a peripheral area; a first wiring layer configured to transfer a gate signal in the display area; a second wiring layer configured to transfer a data voltage in the display area; a data fan-out including a first data fan-out wire connected to the second wiring layer; and a data flexible printed circuit board electrically connected to the first data fan-out wire in the peripheral area, wherein the first data fan-out wire includes a first zigzag portion having a zigzag shape and a first straight portion that extends from the first zigzag portion, and a width of the first straight portion is larger than a width of the first zigzag portion.

According to some example embodiments, the data fan-out may further include a second data fan-out wire adjacent to the first data fan-out wire, the second data fan-out wire may include a second zigzag portion having a zigzag shape and a second straight portion that extends from the second zigzag portion, each of the first zigzag portion and the second zigzag portion may include portions that extend in a first direction and portions that extend in a second direction crossing the first direction, and a minimum distance between the first zigzag portion and the second zigzag portion may be larger than a distance between the portions that extend in the first direction of the first zigzag portion.

According to some example embodiments, the second data fan-out wire may be closer to a center of the data fan-out than the first data fan-out wire, and a length of the second zigzag portion may be longer than a length of the first zigzag portion.

According to some example embodiments, a length of the first straight portion may be longer than a length of the second straight portion.

According to some example embodiments, a width of the first data fan-out wire may be larger than a width of the second data fan-out wire.

According to some example embodiments, the gate flexible printed circuit board may include a data driver integrated circuit.

According to some example embodiments, the peripheral area may include a gate driver.

According to some example embodiments, the display device may further include: a gate fan-out including a first gate fan-out wire connected to the first wiring layer; and a gate flexible printed circuit board electrically connected to the first gate fan-out wire in the peripheral area of the substrate, wherein the first gate fan-out wire may include a third zigzag portion having a zigzag shape and a third straight portion that extends from the third zigzag portion, and a width of the third straight portion may be larger than a width of the third zigzag portion.

According to some example embodiments, the gate fan-out may further include a second gate fan-out wire adjacent to the first gate fan-out wire, the second gate fan-out wire may include a fourth zigzag portion having a zigzag shape and a fourth straight portion that extends from the fourth zigzag portion, each of the third zigzag portion and the fourth zigzag portion may include portions that extend in a first direction and portions that extend in a second direction crossing the first direction, and a minimum distance between the third zigzag portion and the fourth zigzag portion may be larger than a distance between the portions that extend in the second direction in the second zigzag portion.

According to some example embodiments, the second gate fan-out wire may be closer to a center of the gate fan-out than the first gate fan-out wire, and a length of the fourth zigzag portion may be longer than a length of the third zigzag portion.

According to some example embodiments, a length of the third straight portion may be longer than a length of the fourth straight portion.

According to some example embodiments, a width of the first gate fan-out may be larger than a width of the second gate fan-out wire.

According to some example embodiments, a photomask includes: a transmissive portion configured to transmit light; and a blocking portion configured to block light, wherein the blocking portion may include a first zigzag portion having a zigzag shape and a first straight portion that extends from the first zigzag portion, and a width of the first straight portion may be larger than a width of the first zigzag portion.

According to some example embodiments, the blocking portion may include a first slit, and the first slit may extend from the first zigzag portion to the first straight portion.

According to some example embodiments, the blocking portion may further include: a second zigzag portion having a zigzag shape; a second straight portion extending from the second zigzag portion; and a second slit extending from the second zigzag portion to the second straight, wherein each of the first zigzag portion and the second zigzag portion may include portions that extend in a first direction and portions that extend in a second direction crossing the first direction, and a minimum distance between the first zigzag portion and the second zigzag portion may be larger than a distance between the portions that extend in the first direction in the first zigzag portion.

According to some example embodiments, a length of the second zigzag portion may be longer than a length of the first zigzag portion.

According to some example embodiments, in a manufacturing method of a display device, the method includes: forming a conductive layer on a substrate; forming a photoresist film on the conductive layer; forming a photoresist pattern by exposing and developing the photoresist film using a photomask; and forming a zigzag portion and a straight portion of a fan-out wire by etching the conductive layer, and a width of a straight portion of the fan-out wire may be larger than a width of a zigzag portion of the fan-out wire.

According to some example embodiments, the photomask may include a blocking portion having a shape corresponding to the fan-out wire and a transmissive portion as an outer region, and the blocking portion may include a slit formed along a direction in which the blocking portion extends.

According to some example embodiments, a width of the fan-out wire formed in the forming of the zigzag portion and the straight portion of the fan-out wire may be smaller than a width of the blocking portion of the photomask.

According to some example embodiments, the fan-out wire may be electrically connected to a data driving integrated circuit or a gate driving integrated circuit.

According to some example embodiments, even when a distance between the flexible printed circuit board and the display area is narrow, uniform luminance can be obtained throughout the display area, and the dead space can be reduced.

Further, defects of open-circuits due to disconnection of fan-out wires or short-circuits between adjacent fan-out wires can be prevented or reduced by adjusting a width of the fan-out wires or a distance therebetween.

In addition, resolution of the photomask may be increased by using the photomask including the slit when the fan-out wires are formed.

