Display substrate, mother substrate for manufacturing the same and method of manufacturing the display substrate

Patent metadata

Field	Value
Publication number	US-9261742-B2
Application number	US-201213524516-A
Country	US
Kind code	B2
Filing date	Jun 15, 2012
Priority date	Jan 3, 2012
Publication date	Feb 16, 2016
Grant date	Feb 16, 2016

Abstract

A display substrate includes a circuit mounted part that has a driving IC mounted thereon. The circuit mounted part includes an input pad part connected to an input terminal of the driving IC and an output pad part connected to an output terminal of the driving IC. A flexible pad part connected to a terminal of a FPCB includes a driving pad part to receive a drive signal of the driving IC. A driving line part is connected to the driving pad part to be extended along a length direction of the circuit mounted part within the circuit mounted part. Connection lines are extended from the driving line part disposed within the circuit mounted part toward the output pad part. The connection lines are partially removed in a trimming area defined between the driving line and the output pad part.

First claim

What is claimed is:

1. A display substrate, comprising:
at least one circuit mounted part comprising an input pad part coupled to an input terminal of a driving integrated circuit (IC) of the at least one circuit mounted part and an output pad part coupled to an output terminal of the driving IC;
a flexible pad part coupled to a terminal of a flexible printed circuit board, the flexible pad part comprising a driving pad part to receive a drive signal of the driving IC;
an array pad part directly connected to the flexible pad part by at least one first inspection line part formed crossing a cutting line, the cutting line defining a display cell corresponding to the display substrate;
a driving line part coupled to the driving pad part to be extended along a length direction of the at least one circuit mounted part; and
a plurality of connection lines extended toward the output pad part from the driving line part and being disposed within the at least one circuit mounted part,
wherein the at least one first inspection line part crosses the cutting line at least twice.

2. The display substrate of claim 1 , wherein the driving pad part comprises a plurality of pads, and the driving line part comprises a plurality of lines connected to each of the pads, the lines being arranged parallel to each other.

3. The display substrate of claim 2 , wherein the at least one circuit mounted part is arranged in the length direction, and
the driving line part is coupled with the driving pad part and circuit mounted parts of the at least one circuit mounted part according to a one-to-plural ratio.

4. The display substrate of claim 3 , wherein the drive signal comprises a logic power signal.

5. The display substrate of claim 2 , wherein the at least one circuit mounted part is arranged in the length direction, and
the driving line part is coupled with the driving pad part and circuit mounted parts of the circuit mounted part according to a one-to-one ratio.

6. The display substrate of claim 5 , wherein the drive signal comprises at least one of a data signal, a clock signal, and an analog power signal.

7. The display substrate of claim 2 , wherein the at least one circuit mounted part is arranged in the length direction, and
the driving line part is coupled with the driving pad part and circuit mounted parts of the at least one circuit mounted part in a cascade manner.

8. The display substrate of claim 7 , wherein the drive signal comprises at least one of a gamma signal and a carry signal.

9. The display substrate of claim 1 , wherein a number of the at least one circuit mounted part is greater than a number of the flexible pad part.

10. A mother substrate, comprising:
a display cell defined by a cutting line, the display cell comprising:
at least one circuit mounted part comprising a driving integrated circuit (IC), an input pad part coupled to an input terminal of the driving IC, and an output pad part coupled to an output terminal of the driving IC;
a flexible pad part coupled to a terminal of a flexible printed circuit board, the flexible pad part comprising a driving pad part to receive a drive signal of the driving IC;
an array pad part directly connected to the flexible pad part by at least one first inspection line part formed crossing the cutting line;
a driving line part coupled to the driving pad part and extending along a length direction of the at least one circuit mounted part; and
a plurality of connection lines extended toward the output pad part from the driving line part and being disposed within the at least one circuit mounted part,
wherein the at least one first inspection line part crosses the cutting line at least twice.

11. The mother substrate of claim 10 , wherein the array pad part is disposed adjacent to the flexible pad part within the display cell to receive an inspection signal when an array inspection is performed, and the at least one first inspection line part connects the array pad part and the driving pad part crossing the cutting line, and
wherein the mother substrate further comprises:
a visual inspection (“V/I”) pad part disposed adjacent to the array pad part to receive an inspection signal when a visual inspection is performed; and
a second inspection line part connecting the V/I pad part and the array pad part.

12. The mother substrate of claim 10 , further comprising:
a trimming area defined between the driving line part and the output pad part within the circuit mounted part, wherein at least a portion of the connection lines is removed when a trimming process is performed in the trimming area.

13. The mother substrate of claim 10 , wherein the driving pad part comprises a plurality of pads corresponding to an inspection signal, and the driving line part comprises a plurality of lines connected to each of the pads and arranged in parallel.

14. The mother substrate of claim 10 , wherein the at least one circuit mounted part is arranged in the length direction, and
the driving line part is coupled to the driving pad part and circuit mounted parts of the at least one circuit mounted part according to a one-to-plural ratio.

15. The mother substrate of claim 14 , wherein the drive signal comprises a logic power signal.

16. The mother substrate of claim 10 , wherein the at least one circuit mounted part is arranged in the length direction, and
the driving line part is coupled to the driving pad part and circuit mounted parts of the at least one circuit mounted part according to a one-to-one ratio.

17. The mother substrate of claim 16 , wherein the drive signal comprises at least one of a data signal, a clock signal, and an analog power signal.

18. The mother substrate of claim 10 , wherein the at least one circuit mounted part is arranged in the length direction, and
the driving line part is coupled to the driving pad part and the at least one circuit mounted part in a cascade manner.

19. The mother substrate of claim 18 , wherein the drive signal comprises at least one of a gamma signal and a carry signal.

20. A method, comprising:
disposing a display cell defined by a cutting line;
mounting at least one circuit mounted part comprising a driving integrated circuit (“IC”), an input pad part coupled to an input terminal of the driving IC, and an output pad part coupled to an output terminal of the driving IC;
disposing a flexible pad part coupled to a terminal of a flexible printed circuit board, the flexible pad part comprising a driving pad part to receive a drive signal of the driving IC;
disposing at least one first inspection line part crossing the cutting line to directly connect an array pad part to the flexible pad part; and
disposing a driving line part coupled to the driving pad part to be extended along a length direction of the at least one circuit mounted part,
wherein a plurality of connection lines are extended toward the output pad part from the driving line part and are disposed within the at least one circuit mounted part,
wherein the driving line part is not electrically connected to the output pad part via the connection lines in response to removal of at least a portion of the connection lines, and
wherein the at least one first inspection line part crosses the cutting line at least twice.

21. The display substrate of claim 1 , wherein:
the at least one first inspection line part comprises at least three first inspection lines, and
each first inspection lines crosses the cutting line at least twice.

Assignees

• Lee Chong-Guk
• Park Sung-Dong
• Jung Seok-Hyun
• Koo Bon-Yong
• Won Joo-Yeon
• Samsung Display Co Ltd

Inventors

• Lee Chong-Guk
• Park Sung-Dong
• Jung Seok-Hyun
• Koo Bon-Yong
• Won Joo-Yeon

Classifications

• Y10T29/49002

  Electrical device making · CPC title

• G09G2300/0408

  Integration of the drivers onto the display substrate · CPC title

• G09G2330/12

  Test circuits or failure detection circuits included in a display system, as permanent part thereof · CPC title

• G02F1/13454

  Drivers integrated on the active matrix substrate (G02F1/136277 takes precedence) · CPC title

• G09G3/006

  Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays (testing individual LED's G01R31/2635; testing lamps G01R31/44; testing of optical features of LCD displays G02F1/1309) · CPC title