US 12,253,770 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 Oct. 19, 2023, as Appl. No. 18/490,038.
Application 18/490,038 is a continuation of application No. 17/578,883, filed on Jan. 19, 2022, granted, now 11,835,828.
Application 17/578,883 is a continuation of application No. 15/984,873, filed on May 21, 2018, granted, now 11,256,151, issued on Feb. 22, 2022.
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 2024/0045286 A1, Feb. 8, 2024
This patent is subject to a terminal disclaimer.
Int. Cl. G02F 1/1335 (2006.01); G02F 1/1345 (2006.01); G02F 1/1362 (2006.01)
CPC G02F 1/136204 (2013.01) [G02F 1/13452 (2013.01); G02F 2202/22 (2013.01)] 20 Claims
OG exemplary drawing
 
1. A display device comprising:
a first insulating layer 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 insulating layer including a conductive film provided at an opposite side of the second insulating layer to the first insulating layer side, the conductive film overlapping the pixel area, the peripheral area, and the dummy wiring in plan view; and
a pixel layer between the first insulating layer and the second insulating layer, 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 insulating layer at the outermost edge of the first insulating layer,
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 insulating layer and is connected to a reference potential outside the first insulating layer, and
the dummy wiring is provided to discharge electric potential rise on the first insulating layer that occurs due to coupling with electric potential rise of the conductive film on the second insulating layer.