Display device and testing method thereof

Abstract

A display device and a testing method thereof are disclosed, in which a defect caused by an overflow of an organic film constituting an encapsulation film can be detected. The display device comprisesa substrate including a display area where pixels are arranged, and a pad area including a plurality of pads formed outside the display area; an encapsulation film covering the display area, including at least one inorganic film and at least one organic film; a dam arranged between the display area and the pad area; and a conductive testing line arranged between the dam and the pad area and not electrically connected with another conductive line or electrode arranged on the substrate.

Description

[0001] Cross References to Related Applications [0002] This application claims the benefit of Korean Patent Application No. 10-2016-0111737 filed on Aug. 31, 2016, which is incorporated herein by reference as if fully set forth herein for all purposes. technical field [0003] The invention relates to a display device and a testing method thereof. Background technique [0004] Recently, with the advancement of the information age, demands for display devices for displaying images have increased in various forms. Accordingly, various display devices have been used, such as liquid crystal display (LCD) devices, plasma display panel (PDP) devices, and organic light emitting display (OLED) devices. [0005] Among display devices, an organic light emitting display device is a self-luminous device, and has an advantage of being more excellent in viewing angle and contrast than those of a liquid crystal display device. In addition, since the organic light emitting display devic...

AI Technical Summary

Problems solved by technology

[0007] Organic light emitting diodes have a problem in that organic light emitting diodes may be 2 O and O 2 degraded by external factors

[0012] If the organic film 30b overflows toward the pad portion formed outside, electrical contact is not achieved due to the organic film 30b, whereby there arises a problem that a driving defect or a lighting test defect may occur

[0013] Meanwhile, since the organic film 30b has excellent coating properties, but its barrier properties are not good, the organic film 30b should be encapsulated by the second inorganic film 30c

However, if the organic film 30b overflows outside the region where the encapsulation film 30 will be formed, the organic film 30b is not encapsulated by the second inorganic film 30c, as figure 2 shown, and H 2 O, O 2 etc. penetrate into the organic light-emitting layer through the exposed organic film 30b, and another problem that arises from this is that the organic light-emitting diode 20 is degraded.

[0014] As described above, although various problems arise in the case where the organic film 30b overflows outside the area where the encapsulation film 30 is to be formed, since the polymer as the material of the organic film 30b is transparent, another problem occurs Due to: Defects cannot be detected with the naked eye

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