NANO CRYSTAL DISPLAY

• US 20140055440A1
• Filed: 02/12/2013
• Published: 02/27/2014
• Est. Priority Date: 08/21/2012
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Inventors: CHO, Se Hyoung, KIM, YEUN TAE, CHAI, CHONGCHUL, LEE, Sunhwa, JUNG, MEEHYE, WON, SUNGHWAN
• Granted Patent: US 9,035,926 B2
• Time in Patent Office: Days
• US Class Current: 345/212
• CPC Class Codes: G02F 1/133377 Cells with plural compartments or having plurality of liquid crystal microcells partitioned by walls, e.g. one microcell per pixel
• CPC Class Codes: G02F 1/133388 with constructional differences between the display region and the peripheral region
• CPC Class Codes: G02F 1/1339 Gaskets; Spacers; Sealing of cells
• CPC Class Codes: G02F 1/136204 Arrangements to prevent high voltage or static electricity failures
• CPC Class Codes: G02F 1/136209 Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
• CPC Class Codes: G02F 1/136222 Colour filters incorporated in the active matrix substrate
• CPC Class Codes: G09G 3/36 using liquid crystals
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence
• CPC Class Codes: G09G 3/3677 suitable for active matrices only

Abstract

A nano crystal display includes a display panel including a display area and a non-display area, a data driver which applies data voltages to pixels through data lines, a gate driver disposed in the non-display area and which sequentially applies gate signals to the pixels through gate lines in response to control signals, a control signal line part disposed in the non-display area and which applies the control signals to the gate driver, a cover layer which extends in a column direction and covers the gate driver and the control signal line part, and a sub-electrode which extends in the column direction and covers the cover layer. The pixels display gray scales corresponding to the data voltages provided through the data lines in response to the gate signals.

Claims

1. A nano crystal display comprising:

a display panel comprising a display area, in which a plurality of pixels is arranged, and a non-display area;

a data driver which applies data voltages to the pixels through a plurality of data lines;

a gate driver disposed in the non-display area and which sequentially applies gate signals to the pixels through a plurality of gate lines in response to control signals;

a control signal line part disposed in the non-display area and which applies the control signals to the gate driver;

a cover layer which extends in a column direction and covers the gate driver and the control signal line part; and

a sub-electrode which extends in the column direction and covers the cover layer,

wherein the pixels display grayscales corresponding to the data voltages provided through the data lines in response to the gate signals.

2. The nano crystal display of claim 1, wherein the gate driver comprises a plurality of transistors which operates based on the control signals.

3. The nano crystal display of claim 2, wherein the display panel further comprises:

a substrate, on which the control signal line part and the transistors are disposed; and

a black matrix disposed on the substrate corresponding to the non-display area and which covers the control signal line part and the transistors, and

the cover layer is disposed on the black matrix overlapping a first area of the substrate in which the transistors and the control signal line part are disposed.

4. The nano crystal display of claim 3, wherein the sub-electrode is upwardly spaced apart from the black matrix by a predetermined distance in the first area and contacts the black matrix at left and right boundaries of the first area.

5. The nano crystal display of claim 3, further comprising:

a roof layer disposed on the black matrix and which extends in the column direction and covers the sub-electrode.

6. The nano crystal display of claim 5, wherein each of the cover layer, the sub-electrode and the roof layer extends to upper and lower boundaries of an area, in which the gate driver is disposed, when viewed in a plan view.

7. The nano crystal display of claim 5, further comprising:

a sealing layer disposed on the roof layer and which covers the non-display area.

8. The nano crystal display of claim 3, further comprising:

an insulating layer disposed on the black matrix,

wherein the sub-electrode is upwardly spaced apart from the insulating layer by a predetermined distance in the first area and contacts the insulating layer at left and right boundaries of the first area.

9. The nano crystal display of claim 3, further comprising:

a bridge electrode disposed on the black matrix in the first area.

10. The nano crystal display of claim 9, wherein

the control signal line part comprises:

a control line; and

the bridge electrode electrically connects the control line to a transistor of the transistors through a contact hole defined in the black matrix.

11. The nano crystal display of claim 3, further comprising:

a discharge line disposed on the substrate corresponding to the non-display area outside the first area,

wherein the sub-electrode is electrically connected to the discharge line through a contact hole defined in the black matrix.

12. The nano crystal display of claim 11, wherein the discharge line is applied with a ground voltage.

13. The nano crystal display of claim 1, wherein each of the pixels comprises:

a substrate including a pixel area and a boundary area surrounding at least a portion of the pixel area;

a thin film transistor disposed on the substrate;

a first electrode disposed on the pixel area and connected to the thin film transistor;

a second electrode extending in a row direction and upwardly spaced apart from the first electrode by a predetermined distance in the pixel area, wherein a tunnel shaped cavity is defined between the first electrode and the second electrode;

an image display part disposed in the tunnel shaped cavity and which displays an image in response to an electric field generated by the first and second electrodes;

a roof layer disposed on the second electrode; and

a sealing layer disposed on the roof layer and which covers the display area to seal the tunnel shaped cavity.

14. The nano crystal display of claim 13, wherein the image display part is a liquid crystal layer.

15. The nano crystal display of claim 13, wherein the first electrode comprises:

a first trunk portion having a cross shape;

a plurality of branch portions extending from the first trunk portion in a radial shape; and

a plurality of micro-slits defined between the branch portions.

16. A nano crystal display comprising:

a substrate including a display area, in which a plurality of pixels is arranged, and a non-display area adjacent to the display area, wherein the pixels are connected to a plurality of gate lines and a plurality of data lines crossing the gate lines;

a gate driver disposed in the non-display area of the substrate and which sequentially applies gate signals to the pixels through the gate lines in response to control signals;

a control signal line part disposed in the non-display area of the substrate and which applies the control signals to the gate driver;

a sub-electrode which extends in a column direction and covers the gate driver and the control signal line part; and

a roof layer which extends in the column direction and covers the sub-electrode,

wherein the pixels display grayscales corresponding to data voltages provided through the data lines in response to the gate signals, and

the sub-electrode is upwardly spaced apart from the substrate by a predetermined distance in a first area of the substrate, in which the gate driver and the control signal line part are disposed,

wherein the sub-electrode is disposed substantially close to the substrate at left and right boundaries of the first area, and

a tunnel shaped cavity is defined between the substrate and the sub-electrode.

17. The nano crystal display of claim 16, further comprising:

a black matrix disposed on the substrate; and

a sealing layer disposed on the roof layer and which covers the non-display area,

wherein the gate driver comprises a plurality of transistors which operates based on the control signals,

the black matrix covers the control signal line part and the transistors of the gate driver, and

the sub-electrode is upwardly spaced apart from the black matrix in the first area and contacts the black matrix at the left and right boundaries of the first area such that the tunnel shaped cavity is defined between the black matrix and the sub-electrode.

18. The nano crystal display of claim 16, wherein a plurality of openings is defined in each of the sub-electrode and the roof layer.

19. The nano crystal display of claim 18, further comprising:

a liquid crystal layer disposed in the tunnel shaped cavity.

20. The nano crystal display of claim 18, further comprising:

a sealing layer disposed on the roof layer and which covers the non-display area,

wherein the sealing layer is disposed in the openings and the tunnel shaped cavity.