Display device

Patent metadata

Field	Value
Publication number	US-10186180-B2
Application number	US-201615232544-A
Country	US
Kind code	B2
Filing date	Aug 9, 2016
Priority date	Aug 26, 2015
Publication date	Jan 22, 2019
Grant date	Jan 22, 2019

Abstract

A display device includes a display panel including a first and a second non-display area, a main active area, and a sub active area, wherein the active areas each include a matrix of sub-pixels; a data driver in the first non-display area to provide image data to the matrices of sub-pixels; a main gate driver in the second non-display area to provide a corresponding gate signal to each sub-pixel in the main active area; a sub gate driver in the second non-display area to provide a corresponding gate signal to each sub-pixel in the sub active area; an auto-probe test pad in the non-display area for transmitting a first start signal received from an auto-probe signal generating device to one of the main gate driver and the sub gate driver while testing the display panel; and a signal transmission circuit connecting the main gate driver and the sub gate driver.

First claim

What is claimed is:

1. A display device, comprising:
a display panel including a first non-display area, a second non-display area, a main active area, and a sub active area, wherein the main active area and the sub active area each includes a matrix of sub-pixels;
a data driver in the first non-display area to provide image data to the matrices of sub-pixels;
a main gate driver in the second non-display area to provide a corresponding gate signal to each sub-pixel in the main active area;
a sub gate driver in the second non-display area to provide a corresponding gate signal to each sub-pixel in the sub active area;
an auto-probe test pad in the non-display area for transmitting a first start signal received from an auto-probe signal generating device to one of the main gate driver and the sub gate driver while testing the display panel; and
a signal transmission circuit to transmit signals between the main gate driver and the sub gate driver,
wherein the signal transmission circuit is activated in response to a signal which is transmitted from the outside, so that the main gate driver and the sub gate driver are sequentially driven in a forward direction, sequentially driven in a reverse direction, simultaneously driven in two directions, or sequentially driven in two directions.

2. The display device of claim 1 , wherein the first start signal is transmitted through the data driver while not testing.

3. The display device of claim 1 , wherein the main gate driver and the sub gate driver are driven sequentially in a same direction.

4. The display device of claim 1 , wherein the signal transmission circuit includes a first transistor and a second transistor.

5. The display device of claim 4 , wherein the first transistor is connected between a direction terminal on the sub gate driver and a direction terminal on the main gate driver to set a driving direction of the main gate driver and the sub gate driver.

6. The display device of claim 4 , wherein the second transistor is connected between a gate of the first transistor and a second signal line and controlled by a first signal line.

7. The display device of claim 1 , further comprising:
a second start signal,
wherein the first start signal determines a driving direction of the sub gate driver and the second start signal determines a driving direction of the main gate driver,
wherein the sub gate driver and the main gate driver are driven sequentially.

8. The display device of claim 1 , further comprising:
a second start signal,
wherein the first start signal determines a driving direction of the sub gate driver and
the second start signal determines a driving direction of the main gate driver,
wherein the sub gate driver and the main gate driver are driven simultaneously.

9. The display device of claim 1 , wherein the first start signal determines a simultaneous driving of the sub gate driver and the main gate driver in a direction.

10. The display device of claim 1 , wherein the signal transmission circuit connected between the main gate driver and the sub gate driver includes a first portion and a second portion,
wherein the first portion and the second portion each include three transistors.

11. A display device comprising:
a lower substrate;
a display area comprising a main display area and a sub display area, each of which consists of sub-pixels disposed on the lower substrate;
a data driver configured to transmit a data signal to the main display area and the sub display area;
a gate driver comprising a main gate driver transmitting a gate signal to the main display area, and a sub gate driver transmitting a gate signal to the sub display area; and
a signal transmission circuit configured to transmit signals, which are output from input and output terminals of the main gate driver and the sub gate driver, in a first direction or in a second direction,
wherein the signal transmission circuit is activated in response to a signal which is transmitted from the outside, so that the main gate driver and the sub gate driver are sequentially driven in a forward direction, sequentially driven in a reverse direction, simultaneously driven in two directions, or sequentially driven in two directions.

12. The display device of claim 11 , wherein the lower substrate comprises an auto-probe test pad disposed on a non-display area, and either or both of the main gate driver and the sub gate driver operate based on a start signal transmitted along a start signal line connected to the auto signal probe pad.

13. The display device of claim 12 , wherein the signal transmission circuit connects input and output terminals of the main gate driver and the sub gate driver or transmits a start signal to the input and output terminals of the main gate driver and the sub gate driver.

14. The display device of claim 11 , wherein the signal transmission circuit comprises:
a first transistor having a first electrode connected to a Nth terminal of the sub gate driver, and a second electrode connected to a N+1th terminal of the main gate driver; and
a second transistor comprising a gate electrode connected to a first signal line; a first electrode connected to a second signal line, and a second electrode connected to a gate electrode of the first transistor.

15. The display device of claim 14 , wherein the signal transmission circuit is activated when the first transistor is turned on.

16. The display device of claim 14 , wherein the second electrode of the first transistor is connected to a start signal line which is connected to an auto-probe test pad.

17. The display device of claim 11 , wherein the signal transmission circuit comprises:
a first signal transmission circuit configured to sequentially drive the main gate driver and the sub gate driver in a forward direction; and
a second signal transmission circuit configured to sequentially drive the main gate driver and the sub gate driver in a reverse direction.

18. The display device of claim 17 ,
wherein the first signal transmission circuit comprises:
a first transistor having a first electrode connected to a Nth forward direction terminal of the sub gate driver, and a second electrode connected to a N+1th forward direction terminal of the main gate driver;
a second transistor having a gate electrode connected to a first signal line, a first electrode connected to a second signal line, and a second electrode connected to a gate electrode of the first transistor; and
a third transistor having a gate electrode connected to a fourth signal line, a first electrode connected to a third signal line, and a second electrode connected to the gate electrode of the first transistor,

wherein the second signal transmission circuit comprises:
a fourth transistor having a first electrode connected to a Nth reverse direction terminal of the sub gate driver, and a second electrode connected to a N+1th reverse direction terminal of the main gate driver;
a fifth transistor having a gate electrode connected to the first signal line, a first electrode connected to the second signal line, and a second electrode connected to a gate electrode of the fourth transistor; and
a sixth transistor having a gate electrode connected to the fifth signal line, a first electrode connected to the third signal line, and a second electrode connected to the gate electrode of the fourth transistor.

19. The display device of claim 18 , wherein a first forward direction terminal of the sub gate driver and a Mth reverse direction terminal of the main

Assignees

• Lg Display Co Ltd

Inventors

• Park Jaehoon
• Lim Jinho
• Lee Cheolhwan
• Jeon Kyunghyun

Classifications

• G09G2310/0221

  with use of split matrices (G09G3/3644 and G09G3/3666 take precedence) · CPC title

• G09G2310/0213

  controlling the sequence of the scanning lines with respect to the patterns to be displayed, e.g. to save power · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G2300/0408

  Integration of the drivers onto the display substrate · CPC title

• G09G3/3677

  suitable for active matrices only · CPC title