Organic light emitting display device and method of inspecting the same

Patent metadata

Field	Value
Publication number	US-9495893-B2
Application number	US-201314021233-A
Country	US
Kind code	B2
Filing date	Sep 9, 2013
Priority date	Apr 3, 2013
Publication date	Nov 15, 2016
Grant date	Nov 15, 2016

Abstract

An organic light emitting display device includes a display panel including a display area in which pixels are arranged and a non-display area disposed in vicinity of the display area, a scan driver applying scan signals to the pixels, a source driver chip connected to the non-display area to apply a data voltage to the pixels and generating an input signal, a light emitting control driver applying light emitting control signals to the pixels, a detecting capacitor disposed in the non-display area, and first and second test lines connected between the source driver chip and the detecting capacitor to apply the input signal to the detecting capacitor. The source driver chip outputs a charging time of the detecting capacitor on the basis of the input signal as an output signal.

First claim

What is claimed is:

1. An organic light emitting display device, comprising:
a display panel including a display area in which a plurality of pixels are arranged and a non-display area disposed in a vicinity of the display area;
a scan driver applying scan signals to the pixels;
a source driver chip connected to the non-display area to apply data voltages to the pixels and generating an input signal;
a light emitting control driver applying light emitting control signals to the pixels;
a detecting capacitor disposed in the non-display area to provide a voltage change generated in a bending area of the display panel; and
first and second test lines connected between the source driver chip and the detecting capacitor and transmitting the input signal to the detecting capacitor,
the source driver chip outputs the change of the voltage charged in the detecting capacitor as an output signal.

2. The organic light emitting display device of claim 1 , wherein the non-display area comprises:
a first non-display area disposed adjacent to a first side of the display area and connected to the source driver chip;
a third non-display area disposed adjacent to a third side of the display area and opposite to the first side;
a second non-display area disposed adjacent to a second side of the display area and between the first side and the third side, and including the scan driver disposed in the second non-display area; and
a fourth non-display area disposed adjacent to a fourth side of the display area and opposite to the second side, and including the light emitting control driver disposed in the fourth non-display area,
the detecting capacitor is disposed in the second, third, and fourth non-display areas.

3. The organic light emitting display device of claim 2 , wherein the source driver chip comprises a defect detection part that generates the input signal and applies the generated input signal to the detecting capacitor through the first and second test lines.

4. The organic light emitting display device of claim 3 , wherein the defect detection part comprises:
a first node connected to the first test line; and
a second node connected to the second test line,
the defect detection part outputs the output signal measured between the first node and the second node.

5. The organic light emitting display device of claim 2 , wherein the detecting capacitor comprises:
a first electrode connected to the first test line;
a second electrode connected to the second test line and overlapped with the first electrode; and
an insulating layer disposed between the first electrode and the second electrode.

6. The organic light emitting display device of claim 5 , wherein the first electrode is disposed at a position outer than the scan driver in the second non-display area and the second electrode is disposed at a position outer than the light emitting control driver in the fourth non-display area.

7. A method of inspecting an organic light emitting display device, the method comprising:
preparing a display panel including a display area in which a plurality of pixels are arranged and a non-display area disposed adjacent to the display area, in which a detecting capacitor is disposed to provide a voltage change generated in a bending area of the display panel, and a source driver chip connected to the non-display area;
applying an input signal generated by the source driver chip to the detecting capacitor;
outputting the change of the voltage charged in the detecting capacitor as an output signal; and
detecting a defect in the display panel by comparing the time signal corresponding to the voltage change of the output signal to a predetermined time period.

8. The method of claim 7 , wherein the detecting of the defect of the display panel comprises:
determining whether the display panel in a normal state when the time corresponding to the voltage change of the output signal is equal to the predetermined time period; and
determining whether the display panel in an abnormal state in which the defect occurs when the time corresponding to the voltage change of the output signal is smaller than the predetermined time period.

9. The method of claim 7 , wherein the organic light emitting display device further comprises:
a scan driver applying scan signals to the pixels;
a light emitting control driver applying light emitting control signals to the pixels; and
first and second test lines connected between the source driver chip and the detecting capacitor and transmitting the input signal to the detecting capacitor, and
the source driver chip applies a data voltage to the pixels and outputs the change of the voltage charged in the detecting capacitor as the output signal.

10. The method of claim 9 , wherein the non-display area comprises:
a first non-display area disposed adjacent to a first side of the display area and connected to the source driver chip;
a third non-display area disposed adjacent to a third side of the display area and opposite to the first side;
a second non-display area disposed adjacent to a second side of the display area and between the first side and the third side, and including the scan driver disposed in the second non-display area; and
a fourth non-display area disposed adjacent to a fourth side of the display area and opposite to the second side, and including the light emitting control driver disposed in the fourth non-display area,
the detecting capacitor is formed in the second, third, and fourth non-display areas.

11. The method of claim 10 , wherein the source driver chip comprises a defect detection part that generates and applies the input signal to the detecting capacitor through the first and second test lines, the defect detection part comprises:
a first node connected to the first test line; and
a second node connected to the second test line;
the defect detection part outputs the output signal measured between the first node and the second node.

12. The method of claim 10 , wherein the detecting capacitor comprises:
a first electrode connected to the first test line;
a second electrode connected to the second test line and overlapped with the first electrode; and
an insulating layer disposed between the first electrode and the second electrode,
the first electrode is disposed at a position farther than the scan driver in the second non-display area, and
the second electrode is disposed at a position farther than the light emitting control driver in the fourth non-display area.

13. An organic light emitting display device, comprising:
a display panel including
a display area in which a plurality of pixels are arranged and
a non-display area disposed adjacent to the display area;

a scan driver applying scan signals to the pixels;
a source driver chip connected to the non-display area to apply a data voltage to the pixels and generate an input signal;
a light emitting control driver applying light emitting control signals to the pixels;
first, second, and third detecting capacitors disposed in the non-display area to provide a voltage change generated in a bending area of the display panel; and
a plurality of test lines connected between the source driver chip and the first, second, and third detecting capacitors,
the source driver chip selectively applies the input signal to the first, second, and third detecting capacitors through the test lines and selectively outputs the change of the voltage charged in the first, second, and third detecting capacitors as an output signal.

14. The organic light emitting display device of claim 13 , wherein the non-di

Assignees

• Samsung Display Co Ltd

Inventors

• Park Sung Un

Classifications

• G09G3/3208

  organic, e.g. using organic light-emitting diodes [OLED] · CPC title

• G09G3/3275

  Details of drivers for data electrodes · CPC title

• G09G3/006 Primary

  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

• G09G2320/0626

  for control of overall brightness · CPC title

• G09G2300/0426

  Layout of electrodes and connections · CPC title