US 8391020

Here's a concise summary of US patent 8391020:

• Title: Electro-optical device, electro-optical panel, and electronic apparatus
• Current Assignee: 138 East LCD Advancements Ltd
• Inventor: Munehide Saimen
• Filing Date: December 1, 2010
• Issue Date: March 5, 2013
• Abstract: Disclosed herein is an electro-optical device including: an electro-optical panel including a first terminal portion having a first terminal and a second terminal and a second terminal portion having a third terminal and a fourth terminal, the first and the fourth terminal being electrically connected through a first connection wiring, the second and the third terminal being electrically connected through a second connection wiring; a first circuit substrate having a first external terminal connected to the first terminal and a second external terminal connected to the second terminal through a first connection terminal portion respectively; and a second circuit substrate having a third external terminal connected to the third terminal and a fourth external terminal connected to the fourth terminal through a second connection terminal portion respectively.

Plain-Language Overview of Independent Claims:

• Independent Claim 1: This claim describes an electro-optical device. It includes an electro-optical panel with a first set of terminals (first and second terminals) and a second, adjacent set of terminals (third and fourth terminals). On the panel, the first terminal is wired to the fourth terminal, and the second terminal is wired to the third terminal. The device also has two circuit substrates: a first one connected to the first terminal portion, providing external access to the first and second terminals, and a second one connected to the second terminal portion, providing external access to the third and fourth terminals. This setup allows for checking the electrical connections between the panel and the circuit substrates using external terminals.
• Independent Claim 8: This claim describes an electro-optical device featuring an electro-optical panel with a first terminal portion and a third terminal portion, where the third terminal portion is located on the opposite side of a display region relative to the first terminal portion. The first terminal portion has first and second terminals, and the third terminal portion has fifth and sixth terminals. Critically, the first terminal is electrically connected to the fifth terminal, and the second terminal is connected to the sixth terminal, both via connection wirings on the panel. Similar to Claim 1, there's a first circuit substrate connecting to the first terminal portion and a third circuit substrate connecting to the third terminal portion, providing external terminals to test these connections. This configuration enables inspection of connection integrity even with terminal portions separated by the display region.
• Independent Claim 11: This claim describes an electro-optical panel itself, rather than a full device. It has a substrate with four distinct terminal portions: a first, second (adjacent to the first), third (between a substrate side and the first terminal portion), and fourth (between a substrate side and the second terminal portion). Each terminal portion has specific identified terminals (first-second, third-fourth, fifth-sixth, seventh-eighth, respectively). The panel includes a network of nine connection wirings that electrically link these terminals in a complex manner, allowing for comprehensive electrical testing across the various terminal portions. For example, the first terminal connects to the fourth, the first to the fifth, the second to the sixth, the third to the seventh, the fourth to the eighth, and the sixth wiring connects to the seventh wiring, creating a path between the second, third, sixth, and seventh terminals.
• Independent Claim 13: This claim broadly covers an electronic apparatus that comprises any of the electro-optical devices described in the preceding claims (such as those in Claim 1, Claim 8, or Claim 12 which refers to Claim 11).

Litigation Information:

US Patent 8391020 is currently involved in litigation.

• There is a litigation family filed worldwide.
• Two cases have been filed in the Texas Eastern District Court (case numbers 2:25-cv-00358 and 2:25-cv-00440).
• A PTAB case, IPR2025-01412, was filed but was Not Instituted due to procedural reasons.

I do not have authoritative information on the specifics of the current litigation (e.g., parties, claims asserted, current status beyond "filed," etc.) from the provided patent text, other than the dockets listed. I also cannot directly search the USPTO database or CAFC 2026 dockets for further details on these cases with the provided tools.Here's a concise summary of US patent 8391020:

• Title: Electro-optical device, electro-optical panel, and electronic apparatus
• Current Assignee: 138 East LCD Advancements Ltd
• Inventor: Munehide Saimen
• Filing Date: December 1, 2010
• Issue Date: March 5, 2013
• Abstract: Disclosed herein is an electro-optical device including: an electro-optical panel including a first terminal portion having a first terminal and a second terminal and a second terminal portion having a third terminal and a fourth terminal, the first and the fourth terminal being electrically connected through a first connection wiring, the second and the third terminal being electrically connected through a second connection wiring; a first circuit substrate having a first external terminal connected to the first terminal and a second external terminal connected to the second terminal through a first connection terminal portion respectively; and a second circuit substrate having a third external terminal connected to the third terminal and a fourth external terminal connected to the fourth terminal through a second connection terminal portion respectively.

Plain-Language Overview of Independent Claims:

• Independent Claim 1: This claim describes an electro-optical device. It includes an electro-optical panel with a first terminal portion and an adjacent second terminal portion. The first terminal portion contains first and second terminals, while the second terminal portion contains third and fourth terminals. On the electro-optical panel, the first terminal is electrically connected to the fourth terminal via a first connection wiring, and the second terminal is electrically connected to the third terminal via a second connection wiring. The device also includes a first circuit substrate with a first connection terminal portion connected to the first terminal portion of the panel, providing a first external terminal (connected to the first panel terminal) and a second external terminal (connected to the second panel terminal). Similarly, a second circuit substrate has a second connection terminal portion connected to the second terminal portion of the panel, providing a third external terminal (connected to the third panel terminal) and a fourth external terminal (connected to the fourth panel terminal). This arrangement facilitates testing the electrical connections.
• Independent Claim 8: This claim details an electro-optical device featuring an electro-optical panel with a first terminal portion and a third terminal portion. The third terminal portion is situated on the side opposite to the display region relative to the first terminal portion. The first terminal portion has first and second terminals, and the third terminal portion has fifth and sixth terminals. On the electro-optical panel, the first terminal is electrically connected to the fifth terminal via a fifth connection wiring, and the second terminal is electrically connected to the sixth terminal via a sixth connection wiring. The device further includes a first circuit substrate connected to the first terminal portion, providing a first external terminal (connected to the first panel terminal) and a second external terminal (connected to the second panel terminal). A third circuit substrate is connected to the third terminal portion, providing a fifth external terminal (connected to the fifth panel terminal) and a sixth external terminal (connected to the sixth panel terminal). This configuration allows for connection integrity checks, particularly for terminal portions located on opposing sides of the display region.
• Independent Claim 11: This claim describes an electro-optical panel. It includes a substrate on which are provided: a first terminal portion (with first and second terminals), a second terminal portion (adjacent to the first, with third and fourth terminals), a third terminal portion (between a side of the substrate and the first terminal portion, with fifth and sixth terminals), and a fourth terminal portion (between a side of the substrate and the second terminal portion, with seventh and eighth terminals). The panel incorporates a specific network of connection wirings: a first wiring connecting the first and fourth terminals; a fifth wiring connecting the first and fifth terminals; a sixth wiring connecting the second and sixth terminals; a seventh wiring connecting the third and seventh terminals; an eighth wiring connecting the fourth and eighth terminals; and a ninth wiring configured to electrically connect the sixth connection wiring and the seventh connection wiring, thereby electrically connecting the second, third, sixth, and seventh terminals. This comprehensive wiring scheme is designed for thorough connection testing.
• Independent Claim 13: This claim describes an electronic apparatus that incorporates an electro-optical device as defined in any of the preceding claims (e.g., Independent Claims 1, 8, or 12). Claim 12 refers to an electro-optical device that includes the electro-optical panel of Claim 11, along with first, second, third, and fourth circuit substrates connected to their respective terminal portions on the panel, each providing external terminals for connection testing.

Litigation Information:

US Patent 8391020 is currently active and is involved in litigation. It is listed as having "Family has litigation," with a "First worldwide family litigation filed." [cite: patents.google.com/patent/US8391020/en]

Specifically, two US cases related to this patent have been filed in the Texas Eastern District Court:

• Case number 2:25-cv-00358 [cite: patents.google.com/patent/US8391020/en]
• Case number 2:25-cv-00440 [cite: patents.google.com/patent/US8391020/en]

Additionally, a PTAB case, IPR2025-01412, was filed but was not instituted due to procedural reasons. [cite: patents.google.com/patent/US8391020/en]

As of April 26, 2026, general information regarding CAFC dockets for 2026 is available, including scheduled cases for May 2026. However, a direct search of these dockets for the specific patent number 8391020 did not return additional specific litigation details beyond what is already mentioned in the Google Patents record.