Display device
First Claim
1. A display device with a TFT substrate having a display region on which video signal lines are formed, and a terminal portion,wherein the TFT substrate has a first side at which the terminal portion exists, a second side opposite the terminal portion, a third side at a left side of the terminal portion, and a fourth side at a right side of the terminal portion;
- a first crack detection terminal is provided at the third side of the terminal portion, and a second crack detection terminal is provided at the fourth side of the terminal portion;
a crack detection line extends from the first crack detection terminal along the third, second and fourth sides; and
a first switching transistor is provided at the second side between the video signal line and the crack detection line for switching between an image display and crack detection,wherein at the second side, the crack detection line makes a turn at a first fold-back portion around a center of the second side to extend to the third side, makes a turn at a second fold-back portion around the third side to extend to the fourth side, makes a turn at a third fold-back portion around the fourth side to extend to a position around the center of the second side, makes a turn at a fourth fold-back portion around the center of the second side to extend to a position around the fourth side, and further extends along the fourth side.
2 Assignments
0 Petitions
Accused Products
Abstract
A display device is configured to provide a crack detection line running from a first crack detection terminal along a side of a TFT substrate to extend to a second crack detection terminal. A switching transistor for switching between an image display and crack detection is provided at a side opposite a terminal portion between the crack detection line and a video signal line. The crack that may cause disconnection in the crack detection line is detected by turning the switching transistor on, and applying the voltage for lighting inspection to the first crack detection terminal and the second crack detection terminal sequentially in this order.
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Citations
7 Claims
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1. A display device with a TFT substrate having a display region on which video signal lines are formed, and a terminal portion,
wherein the TFT substrate has a first side at which the terminal portion exists, a second side opposite the terminal portion, a third side at a left side of the terminal portion, and a fourth side at a right side of the terminal portion; -
a first crack detection terminal is provided at the third side of the terminal portion, and a second crack detection terminal is provided at the fourth side of the terminal portion; a crack detection line extends from the first crack detection terminal along the third, second and fourth sides; and a first switching transistor is provided at the second side between the video signal line and the crack detection line for switching between an image display and crack detection, wherein at the second side, the crack detection line makes a turn at a first fold-back portion around a center of the second side to extend to the third side, makes a turn at a second fold-back portion around the third side to extend to the fourth side, makes a turn at a third fold-back portion around the fourth side to extend to a position around the center of the second side, makes a turn at a fourth fold-back portion around the center of the second side to extend to a position around the fourth side, and further extends along the fourth side. - View Dependent Claims (2, 3, 4)
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5. A display device with a TFT substrate having a display region on which scanning lines are formed, and a terminal portion,
wherein the TFT substrate has a first side at which the terminal portion exists, a second side opposite the terminal portion, a third side at a left side of the terminal portion, and a fourth side at a right side of the terminal portion; -
a first crack detection terminal is provided at the third side of the terminal portion, and a second crack detection terminal is provided at the fourth side of the terminal portion; a crack detection line extends from the first crack detection terminal along the third, second and fourth sides; a first switching transistor is provided at the second side between the scanning line and the crack detection line for switching between an image display and crack detection; and wherein at the second side, the crack detection line makes a turn at a first fold-back portion around a center of the second side to extend to the third side, makes a turn at a second fold-back portion around the third side to extend to the fourth side, makes a turn at a third fold-back portion around the fourth side to extend to a position around the center of the second side, makes a turn at a fourth fold-back portion around the center of the second side to extend to a position around the fourth side, and further extends along the fourth side. - View Dependent Claims (6, 7)
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Specification