Display device capable of determining a bonding state of a driver integrated circuit therein

Patent metadata

Field	Value
Publication number	US-11404000-B2
Application number	US-202016877671-A
Country	US
Kind code	B2
Filing date	May 19, 2020
Priority date	Jul 5, 2019
Publication date	Aug 2, 2022
Grant date	Aug 2, 2022

Abstract

A display device includes a first substrate including a display area and a non-display area, pixels disposed in the display area, a driver integrated circuit located in the non-display area and connected to the pixels through data lines, a first pad portion disposed in the non-display area, a second pad portion disposed in the non-display area and connected to the driver integrated circuit, a first thin film transistor connected to one of the data lines and adjusting a first data signal, a second thin film transistor connected to another of the data lines and adjusting the first data signal, a first wiring connecting the first thin film transistor and the first pad portion, a second wiring connecting the second thin film transistor and the second pad portion, and a gate signal line connected to the first and second thin film transistors.

First claim

What is claimed is:

1. A display device, comprising:
a first substrate including a display area and a non-display area;
a plurality of pixels disposed in the display area;
a driver integrated circuit located in the non-display area and electrically connected to the plurality of pixels through a plurality of data lines;
a first pad portion disposed in the non-display area and electrically connected to a printed circuit hoard;
a second pad portion disposed in the non-display area and electrically connected to the driver integrated circuit;
a first wiring located in the non-display area and connected to the first pad portion;
a second wiring located in the non-display area and connected to the second pad portion;
a first thin film transistor electrically connecting one of the plurality of data lines to the driver integrated circuit and the first wiring;
a second thin film transistor electrically connecting another of the plurality of data lines to the driver integrated circuit and the second wiring;
a gate signal line connected to gate terminals of the first thin film transistor and the second thin film transistor; and
a driving unit that supplies a first data signal to the driver integrated circuit and a second data signal to the second pad portion.

2. The display device of claim 1 , wherein the first thin film transistor and the second thin film transistor are alternately disposed.

3. The display device of claim 1 , wherein the first wiring comprises a matching resistor.

4. The display device of claim 3 , wherein the matching resistor has a resistance value that is substantially equal to a resistance value of the second pad portion.

5. The display device of claim 1 , further comprising an adhesive portion interposed between the first pad portion and the driver integrated circuit.

6. The display device of claim 5 , wherein the adhesive portion comprises:
an adhesive layer; and
at least one conductive particle dispersed in the adhesive layer.

7. The display device of claim 1 , wherein the driving unit is configured to output a signal to the first wiring and the gate signal lit.

8. The display device of claim 7 , wherein the driving unit comprises a driver chip including:
a first port;
a second port;
a third port connected to the first wiring; and
a fourth port connected to the gate signal line.

9. The display device of claim 8 , further comprising:
a first line disposed on the first substrate and configured to transmit the first data signal output from the driver chip to the driver integrated circuit; and
a second line disposed on the first substrate and configured to apply the second data signal output from the driver chip to the second pad portion.

10. The display device of claim 1 , wherein the driver integrated circuit comprises:
a switching unit configured to switch the first data signal and transmit the first data signal to the first thin film transistor and the second thin film transistor through one of the plurality of data lines.

11. The display device of claim 1 , wherein the driver integrated circuit comprises:
a main body overlapping the second pad portion in a pad area of the first substrate; and
one or more bumps protruding from the main body at predetermined intervals.

12. The display device of claim 11 , wherein the second pad portion comprises:
one or more pad terminals that connect end portions of two adjacent bumps of the one or more bumps.

13. The display device of claim 12 , wherein the second pad portion outputs the second data signal to the second thin film transistor through the second wiring via the one or more bumps.

14. The display device of claim 1 , wherein the second pad portion is disposed at one of opposite ends of the driver integrated circuit or at each of the opposite ends of the driver integrated circuit.

15. The display device of claim 1 , wherein the first thin film transistor is configured to receive the first data signal from the driver integrated circuit, receive the second data signal from the first wiring, and output a difference signal to one or more of the plurality of pixels.

16. The display device of claim 1 , wherein the second thin film transistor is configured to receive the first data signal from the driver integrated circuit, receive the second data signal from the second pad portion, and output a difference signal to one or more of the plurality of pixels.

17. A display device, comprising:
a first substrate including a display area and a non-display area;
a plurality of pixels disposed in the display area;
a driver integrated circuit located in the non-display area and electrically connected to the plurality of pixels through a plurality of data lines;
a first pad portion disposed in the non-display area;
a second pad portion disposed in the non-display area and electrically connected to the driver integrated circuit;
a first wiring located in the non-display area and connected to the first pad portion;
a second wiring located in the non-display area and connected to the second pad portion;
a first thin film transistor electrically connecting one of the plurality of data lines to the driver integrated circuit and the first wiring;
a second thin film transistor electrically connecting another of the plurality of data lines to the driver integrated circuit and the second wiring;
a gate signal line connected to gate terminals of the first thin film transistor and the second thin film transistor;
a connection portion electrically connected to the first pad portion; and
a printed circuit board electrically connected to the connection portion,

wherein the printed circuit board comprises:
a driving unit configured to output a signal to the driver integrated circuit, the first wiring, and the gate signal line,

wherein the driving unit comprises:
a driver chip configured to output a first data signal to the driver integrated circuit and a second data signal through the first pad portion to the second pad portion.

18. The display device of claim 17 , wherein the driver chip is configured to output a gate driving signal to the first pad portion.

19. A display device, comprising:
a plurality of pixels including a plurality of first pixels and a plurality of second pixels alternately disposed in a first direction;
a plurality of first transistors and a plurality of second transistors alternately disposed in the first direction, wherein the plurality of first transistors are connected to the plurality of first pixels and the plurality of second transistors are connected to the plurality of second pixels;
a first pad portion connected to a printed circuit board;
a second pad portion connected to a driver integrated circuit;
a first wiring connecting the plurality of first transistors to the first pad portion via a matching resistor and;
a second wiring connecting the plurality of second transistors to the second pad portion; and
a driving unit that supplies a first data signal to the driver integrated circuit and a second data signal to the second pad portion,
wherein the matching resistor has a resistance value that is substantially the same as a resistance value of the second pad portion.

Assignees

• Samsung Display Co Ltd

Inventors

• Kim Youngbin

Classifications

• H10K59/8791

  Arrangements for improving contrast, e.g. preventing reflection of ambient light · CPC title

• G01R31/70

  Testing of connections between components and printed circuit boards (G01R31/68 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

• G09G2330/12

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

• G09G2300/0426

  Layout of electrodes and connections · CPC title