All-around display device and pixel in the same

Patent metadata

Field	Value
Publication number	US-10685603-B2
Application number	US-201816002833-A
Country	US
Kind code	B2
Filing date	Jun 7, 2018
Priority date	Jun 21, 2017
Publication date	Jun 16, 2020
Grant date	Jun 16, 2020

Abstract

An all-around display device according to embodiments includes a display panel including first to J-th display areas having pixels and respectively corresponding to surfaces, a gate driver for providing a gate signal to the display panel through first to N-th gate lines, and for providing an initialization signal to the display panel through first to N-th initialization lines, an emission driver for providing an emission control signal to the display panel through first to N-th emission control lines, a display area control driver for providing first to J-th global control signals respectively corresponding to the first to J-th display areas to selectively determine light emission of each of the first to J-th display areas, and a data driver for providing a data voltage to the display panel through data lines, wherein J is an integer that is greater than 1, and N is an integer that is greater than J.

First claim

What is claimed is:

1. An all-around display device comprising:
a display panel comprising first to J-th display areas each having a plurality of pixels and respectively corresponding to a plurality of surfaces;
a gate driver for providing a gate signal to the display panel through first to N-th gate lines, and for providing an initialization signal to the display panel through first to N-th initialization lines;
an emission driver for providing an emission control signal to the display panel through first to N-th emission control lines;
a display area control driver for providing first to J-th global control signals respectively corresponding to the first to J-th display areas to selectively determine light emission of each of the first to J-th display areas; and
a data driver for providing a data voltage to the display panel through data lines,
wherein J is an integer that is greater than 1, and N is an integer that is greater than J,
wherein each of the pixels comprises:
a fourth transistor connected between a first power source for providing a first power voltage and a first node, and comprising a gate electrode to receive the emission control signal;
a fifth transistor connected between a second node and a fourth node, and comprising a gate electrode to receive the emission control signal; and
a seventh transistor connected between an emission control line and both of the gate electrodes of the fourth and fifth transistors, and comprising a gate electrode to receive one of the first to J-th global control signals.

2. The all-around display device of claim 1 , wherein each of the pixels comprises:
a first transistor connected between a data line and the first node, and comprising a gate electrode to receive the gate signal;
a driving transistor for generating a driving current, and connected between the first node and the second node, and comprising a gate electrode connected to a third node;
a second transistor connected between the second node and the third node, and comprising a gate electrode to receive the gate signal;
a third transistor connected between the third node and an initialization power source for providing an initialization voltage, and comprising a gate electrode to receive an initialization signal;
a sixth transistor connected between the initialization power source and the fourth node, and comprising a gate electrode to receive the gate signal;
a storage capacitor connected between the first power source and the third node; and
an organic light emitting diode connected between the fourth node and a second power source for providing a second power voltage that is less than the first power voltage.

3. The all-around display device of claim 2 , wherein the display area control driver is for outputting an active level of a K-th global control signal corresponding to a K-th display area to display an image, where K is a positive integer that is less than or equal to J.

4. The all-around display device of claim 3 , wherein the K-th global control signal corresponding to the K-th display area has the same waveform as the emission control signal applied to the first emission control line.

5. The all-around display device of claim 3 , wherein the display area control driver is for outputting an inactive level of an I-th global control signal corresponding to an I-th display area to prevent an image from being displayed thereon, where I is a positive integer that is less than or equal to J.

6. The all-around display device of claim 5 , wherein the emission control signal is prevented from being applied to the gate electrodes of the fourth transistor and the fifth transistor by the I-th global control signal having the inactive level.

7. The all-around display device of claim 3 , wherein the K-th global control signal maintains the active level in frames after an image display start frame when the K-th display area displays the image during consecutive frames.

8. The all-around display device of claim 2 , wherein a non-emission period in which the emission control signal has an inactive level comprises:
a first period for initializing a voltage of the third node; and
a second period after the first period for writing the data voltage, for compensating a threshold voltage of the driving transistor, and for initializing a voltage of the fourth node.

9. The all-around display device of claim 8 , wherein, in the first period, the initialization signal has an active level, and the gate signal has an inactive level.

10. The all-around display device of claim 8 , wherein, in the second period, the initialization signal has an inactive level, and the gate signal has an active level.

11. The all-around display device of claim 1 , wherein the display panel is a flexible display panel in which each boundary between adjacent ones of the surfaces is bent.

12. The all-around display device of claim 1 , further comprising:
a touch driver for detecting a touch on the display panel; and
a timing controller for controlling the gate driver, the emission driver, the display area control driver, the data driver, and the touch driver.

13. The all-around display device of claim 12 , wherein the display area control driver is for outputting a global control signal that corresponds to a touched display area of the first to J-th display areas and that is at an active level during an active period of the emission control signal applied to the first emission control line.

14. The all-around display device of claim 12 , wherein the timing controller is for providing a control signal to the display area control driver to determine whether to activate any or all of the first to J-th global control signals based on a touch detection that is output from the touch driver.

15. The all-around display device of claim 1 , wherein a K-th global control signal is applied commonly to the pixels in a K-th display area, K being a positive integer that is less than or equal to J.

16. An all-around display device comprising:
a display panel comprising first to J-th display areas each having a plurality of pixels and respectively corresponding to a plurality of surfaces;
a gate driver for providing a gate signal to the display panel through first to N-th gate lines, and for providing an initialization signal to the display panel through first to N-th initialization lines;
an emission driver for providing an emission control signal to the display panel through first to N-th emission control lines;
a display area control driver for providing first to J-th global control signals respectively corresponding to the first to J-th display areas to selectively determine light emission of each of the first to J-th display areas; and
a data driver for providing a data voltage to the display panel through data lines,
wherein J is an integer that is greater than 1, and N is an integer that is greater than J,
wherein each of the pixels comprises:
a fourth transistor connected between a first power source for providing a first power voltage and a first node, and comprising a gate electrode; and
a fifth transistor connected between a second node and a fourth node, and comprising a gate electrode,

wherein one of the gate electrode of the fourth transistor and the gate electrode of the fifth transistor is configured to receive the emission control signal, and the other of the gate electrode of the fourth transistor and the gate electrode of the fifth transistor is configured to receive one of the first to J-th global control signals corresponding to a display area comprising the pixel.

17.

Assignees

• Samsung Display Co Ltd

Inventors

• Jeong Heesoon
• Seo Hae-Kwan

Classifications

• G09G2310/0221

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

• G09G2300/0819

  used for counteracting undesired variations, e.g. feedback or autozeroing · CPC title

• G09G3/3275

  Details of drivers for data electrodes · CPC title

• G09G3/3266

  Details of drivers for scan electrodes · CPC title

• G09G2330/027

  Arrangements or methods related to powering off a display · CPC title