US 11,835,828 B2
Liquid crystal display device having improved electrostatic discharge resistance
Yasuo Segawa, Kitagata-cho (JP); Masaaki Aota, Ogaki (JP); Tomohide Onogi, Anparhi-cho (JP); and Hiroshi Matsuda, Gifu (JP)
Assigned to Japan Display Inc., Tokyo (JP)
Filed by Japan Display Inc., Tokyo (JP)
Filed on Jan. 19, 2022, as Appl. No. 17/578,883.
Application 17/578,883 is a continuation of application No. 15/984,873, filed on May 21, 2018, granted, now 11,256,151.
Application 15/984,873 is a continuation of application No. 15/078,170, filed on Mar. 23, 2016, granted, now 10,001,685, issued on Jun. 19, 2018.
Application 15/078,170 is a continuation of application No. 14/447,243, filed on Jul. 30, 2014, granted, now 9,335,594, issued on May 10, 2016.
Application 14/447,243 is a continuation of application No. 12/003,455, filed on Dec. 26, 2007, granted, now 8,830,409, issued on Sep. 9, 2014.
Claims priority of application No. 2006-352377 (JP), filed on Dec. 27, 2006.
Prior Publication US 2022/0137468 A1, May 5, 2022
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/133 (2006.01); G02F 1/1362 (2006.01); G02F 1/1345 (2006.01)
CPC G02F 1/136204 (2013.01) [G02F 1/13452 (2013.01); G02F 2202/22 (2013.01)] 19 Claims
OG exemplary drawing
 
1. A liquid crystal display device comprising:
a first substrate including pixel electrodes and a common electrode in a pixel area and including a peripheral circuit and a dummy wiring in a peripheral area surrounding the pixel area;
a second substrate including a translucent conductive film provided at an opposite side of the second substrate to the first substrate side, the translucent conductive film overlapping the pixel area, the peripheral area, and the dummy wiring in plan view; and
a liquid crystal layer between the first substrate and the second substrate, wherein
the peripheral circuit includes a common wiring supplying a common electric potential to the common electrode, the common wiring being separated from the dummy wiring,
the dummy wiring is located between the peripheral circuit and an outermost edge of the first substrate at the outermost edge of the first substrate,
the dummy wiring is made of a continuous metal layer surrounding the pixel area and peripheral circuit on at least three sides of the first substrate and is connected to a ground potential outside the first substrate to ground the static electricity, and
the dummy wiring is provided to discharge electric potential rise on the first substrate that occurs due to coupling with electric potential rise of the translucent conductive film on the second substrate.