Display device

• US 8,102,349 B2
• Filed: 07/21/2008
• Issued: 01/24/2012
• Est. Priority Date: 07/31/2007
• Status: Active Grant

• Current Assignee: Panasonic Intellectual Property Corporation of America (Panasonic Holdings Corporation)
• Original Assignee: Panasonic Liquid Crystal Display Company Limited (Panasonic Holdings Corporation)
• Inventors: Ashizawa, Keiichirou, Ichihara, Katsumi, Hirata, Masafumi
• Primary Examiner(s): Wang, Quan-Zhen
• Assistant Examiner(s): EURICE, MICHAEL
• Application Number:
  US12/176,598
• Publication Number:
  US 20090033609A1
• Time in Patent Office: 1,282 Days
• Field of Search: 345/33, 345 36- 39, 345 41- 51, 345/55, 345 84- 88, 345 90- 93, 345 98-108, 345204-214, 345/690, 345694-696, 345/698, 3151691-1694, 349/139, 349/149, 349/152
• US Class Current: 345/92
• CPC Class Codes: G02F 1/1345 Conductors connecting electrodes to cell terminals
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: H05K 1/117 Pads along the edge of rigid circuit boards, e.g. for pluggable connectors

Abstract

A liquid crystal display device includes a liquid crystal display panel which sandwiches liquid crystal in the inside thereof sealed by a TFT substrate, a color filter substrate and a sealing portion, and a flexible printed circuit board which is mounted on the TFT substrate, wherein the TFT substrate has an area larger than the color filter substrate. A plurality of scanning lines extend in a lateral direction and are arranged parallel to each other in a longitudinal direction, a plurality data signal lines extend in the longitudinal direction and are arranged parallel to each other in the lateral direction, and terminal portions corresponding to the scanning lines are formed on the TFT substrate, the terminal portion is arranged at a region that is not covered by the color filter substrate. The terminal portions and the scanning lines are connected by auxiliary lines and connection lines in order from the terminal portions. The connection lines are arranged in a region covered with the color filter substrate, and the auxiliary lines extend to both the region that is covered by the color filter substrate and the region that is not covered by the color filter substrate.

Claims

1. A liquid crystal display device including a liquid crystal display panel which sandwiches liquid crystal in the inside thereof sealed by a TFT substrate, a color filter substrate and a sealing portion, and a flexible printed circuit board which is mounted on the TFT substrate, wherein

the TFT substrate has an area larger than the color filter substrate,

a plurality of scanning lines extend in a lateral direction and are arranged parallel to each other in a longitudinal direction, a plurality of data signal lines extend in the longitudinal direction and are arranged parallel to each other in the lateral direction, and terminal portions corresponding to the scanning lines are formed on the TFT substrate, the terminal portion is arranged at a region that is not covered by the color filter substrate, the terminal portions are formed as a unit for every flexible printed circuit board, and the terminal portions and the scanning lines are connected by auxiliary lines and connection lines in order from the terminal portions,

the connection lines are arranged in a region covered with the color filter substrate, a width of the connection line at a peripheral portion of the unit is set larger than the width of the connection line at a center portion of the unit, the auxiliary line between the terminal portion and the connection line is formed of a straight line, and a width of the auxiliary line is 20 μ

m or more and is set larger than the width of the connection line at the center portion of the unit, and

the auxiliary lines extend to both the region that is covered by the color filter substrate and the region that is not covered by the color filter substrate.

2. A display device according to claim 1, wherein the width of the auxiliary line is 23 μ

m or more.

3. A display device according to claim 1, wherein the width of the auxiliary line is equal to a width of the terminal portion.

4. A liquid crystal display device including a liquid crystal display panel which sandwiches liquid crystal in the inside thereof sealed by a TFT substrate, a color filter substrate and a sealing portion, and a flexible printed circuit board which is mounted on the TFT substrate, wherein

the TFT substrate has an area larger than the color filter substrate,

a plurality of scanning lines extend in a lateral direction and are arranged parallel to each other in the longitudinal direction, a plurality of data signal lines extend in the longitudinal direction and are arranged parallel to each other in the lateral direction, and terminal portions corresponding to the data signal lines are formed on the TFT substrate, the terminal portion is arranged at a region that is not covered by the color filter substrate, the terminal portions are formed as a unit for every flexible printed circuit board, and the terminal portions and the data signal lines are connected by auxiliary lines and connection lines in order from the terminal portions,

the connection lines are arranged in a region covered with the color filter substrate, a width of the connection line at a peripheral portion of the unit is set larger than the width of the connection line at a center portion of the unit, the auxiliary line between the terminal portion and the connection line is formed of a straight line, and a width of the auxiliary line is 20 μ

m or more and is set larger than the width of the connection line at the center portion of the unit, and

the auxiliary lines extend to both the region that is covered by the color filter substrate and the region that is not covered by the color filter substrate.

5. A display device according to claim 4, wherein the width of the auxiliary line is 23 μ

m or more.

6. A display device according to claim 4, wherein the width of the auxiliary line is equal to a width of the terminal portion.

7. A liquid crystal display device including a liquid crystal display panel which sandwiches liquid crystal in the inside thereof sealed by a TFT substrate, a color filter substrate and a sealing portion, and a flexible printed circuit board which is mounted on the TFT substrate, wherein

the TFT substrate has an area larger than the color filter substrate,

a plurality of scanning lines extend in a lateral direction and are arranged parallel to each other in a longitudinal direction, a plurality of data signal lines extend in the longitudinal direction and are arranged parallel to each other in the lateral direction, and terminal portions corresponding to the scanning lines are formed on the TFT substrate, the terminal portions are formed as a unit for every flexible printed circuit board, the terminal portions and the scanning lines are connected by auxiliary lines and connection lines in order from the terminal portions, and the connection line is configured such that the connection line is formed of a straight line at a center portion of the unit and is arranged outside at a peripheral portion of the unit,

the connection lines are arranged in a region covered with the color filter substrate, a width of the connection line at a peripheral portion of the unit is set larger than the width of the connection line at a center portion of the unit, the auxiliary line is configured such that the auxiliary line is formed of a straight line at the center portion of the unit and is arranged outside in the peripheral portion of the unit, and a width of the auxiliary line is 20 μ

m or more, and

the auxiliary lines extend to both the region that is covered by the color filter substrate and a region that is not covered by the color filter substrate.

8. A display device according to claim 7, wherein the width of the auxiliary line is 23 μ

m or more.

9. A display device according to claim 7, wherein the width of the auxiliary line is equal to a width of the terminal portion.

10. A liquid crystal display device including a liquid crystal display panel which sandwiches liquid crystal in the inside thereof sealed by a TFT substrate, a color filter substrate and a sealing portion, and a flexible printed circuit board which is mounted on the TFT substrate, wherein

the TFT substrate has an area larger than the color filter substrate;

a plurality of scanning lines extend in a lateral direction and are arranged parallel to each other in a longitudinal direction, a plurality data signal lines which extend in the longitudinal direction and are arranged parallel to each other in the lateral direction, and terminal portions corresponding to the data signal lines are formed on the TFT substrate, the terminal portions are formed as a unit for every flexible printed circuit board, the terminal portions and the data signal lines are connected by auxiliary lines and connection lines in order from the terminal portions, and the connection line is configured such that the connection line is formed of a straight line at a center portion of the unit and is arranged outside at a peripheral portion of the unit,

the connection lines are arranged in a region covered with the color filter substrate, a width of the connection line at a peripheral portion of the unit is set larger than the width of the connection line at a center portion of the unit, the auxiliary line is configured such that the auxiliary line is formed of a straight line at the center portion of the unit and is arranged outside in the peripheral portion of the unit, and a width of the auxiliary line is 20 μ

m or more, and

the auxiliary lines extend to both the region that is covered by the color filter substrate and a region that is not covered by the color filter substrate.

11. A display device according to claim 10, wherein the width of the auxiliary line is 23 μ

m or more.

12. A display device according to claim 10, wherein the width of the auxiliary line is equal to a width of the terminal portion.