Patent ID: 8773630

Claim:
A display device comprising: a display panel, wherein the display panel has a bonded substrate which is bonded with a seal portion having an inlet portion, in which an inlet portion of a fluid is formed, the bonded substrate comprising a TFT substrate and a color filter substrate facing the TFT substrate, the TFT substrate having an overlapping region to the color filter substrate and a non-overlapping region to the color filter substrate in plan view, a sealing material which seals the inlet portion and is arranged between the TFT substrate and the color filter substrate, a plurality of first metal film patterns which are provided in a first end portion of the non-overlapping region to confirm position and dimension precision of the sealing material, a plurality of second metal film patterns which are provided in a second end portion of the overlapping region to confirm the position and dimension precision of the sealing material, the second end portion being located on a side of the TFT substrate opposite to the first end portion, the inlet portion being arranged between a first portion of the plurality of second metal film patterns and a second portion of the plurality of second metal film patterns, a flexible printed board having a plurality of connection terminals, a plurality of external connection terminals which respectively have first rectangular pattern base portions and are provided in parallel in a first direction on the non-overlapping region of the TFT substrate, each of the plurality of external connection terminals being connected to each of the plurality of connection terminals, and each of the plurality of first metal film patterns of the non-overlapping region having a second rectangular pattern base portion of the first metal film patterns, the first metal film patterns are provided in parallel in the first direction such that a first center position of the first rectangular pattern base portion of the plurality of external connection terminals in the first direction is aligned with a second center position of the second rectangular base portion of the plurality of first metal patterns in the first direction, and a second width of the second rectangular pattern base portion in the first direction is equal to or smaller than a first width of the first rectangular base portion in the first direction.