DISPLAY DEVICE

• US 20190310509A1
• Filed: 03/21/2019
• Published: 10/10/2019
• Est. Priority Date: 04/06/2018
• Status: Active Grant

• Current Assignee: TCL China Star Optoelectronics Technology Co. Ltd. (TCL Technology Group Corp.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: Shin, Donghee, Noh, Choong-ho, Song, Hyungjin, Lee, Jinyoung
• Granted Patent: US 10,866,473 B2
• Time in Patent Office: Days
• CPC Class Codes: G02F 1/133345 Insulating layers G02F1/1335, G02F1/1337, G02F1/135, G02F1/136 take precedence
• CPC Class Codes: G02F 1/13452 Conductors connecting driver circuitry and terminals of panels
• CPC Class Codes: G02F 1/13458 Terminal pads
• CPC Class Codes: G02F 1/136227 Through-hole connection of the pixel electrode to the active element through an insulation layer
• CPC Class Codes: G02F 1/136254 Checking; Testing
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2330/12 Test circuits or failure detection circuits included in a display system, as permanent part thereof
• CPC Class Codes: G09G 3/006 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 Class Codes: G09G 3/3607 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels display of colours in flat matrix panels other than liquid crystal displays G09G3/2003; grey scales specific for television H04N3/127
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3659 the addressing of the pixel involving the control of two or more scan electrodes or two or more data electrodes, e.g. pixel voltage dependant on signal of two data electrodes
• CPC Class Codes: H01L 27/12 the substrate being other than a semiconductor body, e.g. an insulating body
• CPC Class Codes: H01L 27/124 with a particular composition, shape or layout of the wiring layers specially adapted to the circuit arrangement, e.g. scanning lines in LCD pixel circuits wiring structures per se H01L23/52
• CPC Class Codes: H01L 27/1255 integrated with passive devices, e.g. auxiliary capacitors
• CPC Class Codes: H10K 59/131 Interconnections, e.g. wiring lines or terminals

Abstract

A display device includes a plurality of pixel rows, a first data line, a second data line, a data driver, a first test part, and a second test part. Each of the plurality of pixel rows includes a plurality of pixels. The first data line is disposed between two adjacent pixel rows among the a plurality of pixel rows. The second data line is disposed between the two adjacent pixel rows. The data driver is configured to provide at least one data signal to the first data line and the second data line. The first test part is connected to one of the first data line and the second data line, and is disposed between the plurality of pixel rows and the data driver. The second test part is electrically connected to the other of the first data line and the second data line.

Claims

1. A display device comprising:

a plurality of pixels each comprising a transistor, the transistor comprising an input electrode, an output electrode, and a control electrode disposed in a different layer than the input electrode and the output electrode;

a plurality of data lines comprising;

a plurality of main data lines disposed in a same layer as the input electrode and the output electrode; and

a plurality of fan-out data lines disposed in a same layer as the control electrode, the plurality of fan-out data lines being respectively electrically connected to first ends of the plurality of main data lines through contact holes;

a data driver electrically connected to the plurality of fan-out data lines and configured to provide a data signal to the plurality of data lines;

a plurality of first test parts disposed in the same layer as the plurality of main data lines and disposed between the plurality of pixels and the data driver, the plurality of first test parts being electrically connected to one group of data lines among a first group of data lines and a second group of data lines, the first group of data lines comprising odd-numbered data lines among the plurality of data lines, the second group of data lines comprising even-numbered data lines among the plurality of data lines; and

a plurality of second test parts extending from respective second ends of those main data lines of those data lines of the other group of data lines among the first group of data lines and the second group of data lines.

2. The display device of claim 1, wherein:

the plurality of first test parts comprises;

a plurality of first test lines overlapping, in a plan view, respective fan-out data lines of the plurality of fan-out data lines; and

a plurality of first test pads respectively extending from the plurality of first test lines, and

the plurality of second test parts comprises;

a plurality of second test lines; and

a plurality of second test pads respectively extending from the plurality of second test lines.

3. The display device of claim 2, wherein the plurality of second test pads are disposed between the plurality of second test lines and the plurality of data lines.

4. The display device of claim 2, wherein the plurality of second test lines are disposed between the plurality of second test pads and the plurality of data lines.

5. The display device of claim 2, wherein:

the plurality of first test pads are arranged in one row; and

the plurality of second test pads are arranged in a plurality rows.

6. The display device of claim 5, wherein:

the plurality of second test pads are arranged in three rows;

each (3k-2)-th (“

k”

being a natural number greater than or equal to

     1) main data line of those data lines of the other group is respectively connected to a second test pad in a first row among the plurality of second test pads;

each (3k-1)-th main data line of those data lines of the other group is respectively connected to a second test pad in a second row among the plurality of second test pads; and

each 3k-th main data line of those data lines of the other group is respectively connected to a second test pad in a third row among the plurality of second test pads.

7. The display device of claim 2, wherein:

the plurality of pixels are arranged in a plurality of columns; and

those pixels in one column among the plurality of columns and arranged in odd-numbered positions are electrically connected to a first data line among the plurality of data lines; and

those pixels in the one column and arranged in even-numbered positions are electrically connected to a second data line among the plurality of data lines, the second data line being adjacent to the first data line.

8. The display device of claim 7, further comprising:

a plurality of gate lines configured to provide gate signals to the plurality of pixels,

wherein each of the plurality of gate lines is connected to one of those pixels arranged in the odd-numbered positions and one of those pixels arranged in the even-numbered positions.

9. The display device of claim 2, wherein each of a distance between two adjacent first test lines among the plurality of first test lines and a distance between two adjacent second test lines among the plurality of second test lines is greater than or equal to about 50 μ

m and less than or equal to about 100 μ

m.

10. The display device of claim 9, wherein each of the plurality of first test lines and each of the plurality of second test lines has a length greater than or equal to about 300 μ

m and less than or equal to about 500 μ

m.

11. The display device of claim 1, further comprising:

a plurality of third test parts extending from respective second ends of those main data lines of those data lines of the first group, the plurality of third test parts comprising a plurality of first test pads,

wherein the plurality of first test parts comprises a plurality of first test lines overlapping, in a plan view, a respective plurality of fan-out data lines among the plurality of fan-out data lines, and

wherein the plurality of second test parts comprises;

a plurality of second test lines; and

a plurality of second test pads respectively extending from the plurality of second test lines.

12. The display device of claim 11, wherein the plurality of first test pads are arranged in a different row from the plurality of second test pads.

13. The display device of claim 1, wherein:

the data driver is one of a plurality of data drivers; and

the plurality of data drivers is disposed adjacent to only one side of the plurality of first test parts.

14. A display device comprising:

a plurality of pixel rows each comprising a plurality of pixels;

a first data line disposed between two adjacent pixel rows of the plurality of pixel rows;

a second data line disposed between the two adjacent pixel rows;

a data driver configured to provide at least one data signal to the first data line and the second data line;

a first test part connected to one of the first data line and the second data line, the first test part being disposed between the plurality of pixel rows and the data driver; and

a second test part electrically connected to the other of the first data line and the second data line,

wherein the plurality of pixel rows are disposed between the first test part and the second test part.

15. The display device of claim 14, wherein each of the first data line and the second data line comprises:

a main data line extending in a direction crossing the plurality of pixel rows, the main data line being disposed in a same layer as the first test part and the second test part; and

fan-out data line disposed in a different layer from the main data line, the fan-out data line being electrically connected to the main data line through a contact hole and configured to electrically connect the main data line to the data driver.

16. The display device of claim 15, wherein, in a plan view, the first test part overlaps the fan-out data line.

17. The display device of claim 16, wherein:

the first test part comprises;

a first test line extending in the direction; and

a first test pad extending from the first test line; and

the second test part comprises;

a second test line extending the direction; and

a second test pad extending from the second test line.

18. The display device of claim 17, wherein the first test line is disposed between the first test pad and the data driver.

19. The display device of claim 17, wherein the second test pad is disposed between the second test line and the plurality of pixel rows.

20. The display device of claim 17, wherein the second test line is disposed between the second test pad and the plurality of pixel rows.

21. The display device of claim 17, wherein each of the first test line and the second test line has a length greater than or equal to about 300 μ

m and less than or equal to about 500 μ

m.

22. The display device of claim 21, wherein each of the first test pad and the second test pad has a width greater than or equal to about 50 μ

m and less than or equal to about 100 μ

m.

23. The display device of claim 14, further comprising:

a plurality of gate lines configured to transmit gate signals to the plurality of pixels,

wherein each of the plurality of gate lines is connected to two pixels adjacent to one another in a direction crossing a direction of extension of the plurality of pixel rows.

24. The display device of claim 14, wherein:

each of the plurality of pixels comprises a transistor, the transistor comprises an input electrode, an output electrode, and a control electrode; and

the first test part and the second test part are disposed in a same layer as the input electrode and the output electrode.