DISPLAY PANEL, DISPLAY APPARATUS HAVING THE SAME, AND METHOD THEREOF

• US 20070195029A1
• Filed: 02/15/2007
• Published: 08/23/2007
• Est. Priority Date: 02/20/2006
• Status: Active Grant

• Current Assignee: Samsung Display Company Limited (Samsung Electronics Co. Ltd.)
• Original Assignee: Samsung Electronics Co. Ltd.
• Inventors: JEON, Jin, KIM, Hyung-Guel
• Granted Patent: US 7,903,096 B2
• Time in Patent Office: Days
• US Class Current: 345/87
• CPC Class Codes: G02F 1/13338 Input devices, e.g. touch panels
• CPC Class Codes: G02F 1/13394 spacers regularly patterned on the cell subtrate, e.g. walls, pillars G02F1/133377 takes precedence
• CPC Class Codes: G02F 1/134363 for applying an electric field parallel to the substrate, i.e. in-plane switching [IPS]
• CPC Class Codes: G06F 3/047 using sets of wires, e.g. crossed wires
• CPC Class Codes: G09G 2300/0426 Layout of electrodes and connections
• CPC Class Codes: G09G 2300/0443 with several sub-pixels for the same colour in a pixel, not specifically used to display gradations G09G3/364 takes precedence
• CPC Class Codes: G09G 2300/0465 Improved aperture ratio, e.g. by size reduction of the pixel circuit, e.g. for improving the pixel density or the maximum displayable luminance or brightness
• CPC Class Codes: G09G 3/3648 using an active matrix G09G3/367 - G09G3/3696 take precedence

Abstract

A display panel includes an array substrate and an opposite substrate. The array substrate includes a plurality of data lines, a plurality of gate lines, a plurality of first signal lines, a plurality of second signal lines and a plurality of pixels. Each of the pixels includes a pixel electrode and a common electrode insulated from the pixel electrode. The opposite substrate includes a plurality of connecting members. At least one of the connecting members is electrically connected to at least one of the first signal lines and the second signal lines by an externally provided pressure. Thus, when an externally provided pressure is applied to the display panel in order to perform a touch screen function, an alignment of the liquid crystal molecules disposed on the array substrate may not be substantially changed, and a display quality may be improved.

Claims

1. A display panel comprising:

an array substrate including a plurality of data lines, a plurality of gate lines crossing the data lines, a plurality of first signal lines substantially parallel to the gate lines, a plurality of second signal lines substantially parallel to the data lines, a plurality of pixels defined by gate lines adjacent to each other and data lines adjacent to each other, wherein each of the pixels includes a pixel electrode and a common electrode insulated from the pixel electrode; and

an opposite substrate combined with the array substrate to receive a liquid crystal layer and including a plurality of connecting members, at least one of the connecting members electrically connected to at least one of the first signal lines and the second signal lines by an externally provided pressure.

2. The display panel of claim 1, wherein the first signal lines are formed from a substantially same layer as the gate lines, and the second signal lines are formed from a substantially same layer as the data lines.

3. The display panel of claim 1, further comprising a gap-maintaining member maintaining a gap between the array substrate and the opposite substrate.

4. The display panel of claim 3, wherein the gap-maintaining member is a column spacer.

5. The display panel of claim 1, wherein each of the connecting members has a protrusion protruding from the opposite substrate and a conductive layer covering the protrusion.

6. The display panel of claim 1, wherein the array substrate further comprises:

a plurality of first sensing electrodes, each of the first sensing electrodes disposed on a respective one of the first signal lines and electrically connected to a respective one of the first signal lines; and

a plurality of second sensing electrodes, each of the second sensing electrodes disposed on a respective one of the second signal lines and electrically connected to a respective one of the second signal lines.

7. The display panel of claim 6, wherein the first and the second sensing electrodes are formed from a substantially same layer as the pixel electrode of each pixel.

8. The display panel of claim 6, wherein the first and second sensing electrodes are formed from a substantially same layer as the common electrode of each pixel.

9. The display panel of claim 1, wherein the array substrate further comprises:

a plurality of first sensing electrodes, each of the first sensing electrodes disposed on a respective one of the first signal lines and electrically connected to a respective one of the first signal lines;

a plurality of second sensing electrodes, each of the second sensing electrodes disposed on a respective one of the second signal lines and electrically connected to a respective one of the second signal lines; and

a plurality of third sensing electrodes, each of the third sensing electrodes spaced apart from the first and the second sensing electrodes and overlapped by each of the connecting members.

10. The display panel of claim 9, wherein the array substrate further comprises a common voltage line to apply a predetermined voltage to the common electrode, and each of the third sensing electrodes is electrically connected to the common voltage line.

11. The display panel of claim 9, wherein the first to the third sensing electrodes are formed from a substantially same layer as the pixel electrode of each pixel.

12. The display panel of claim 1, further comprising the liquid crystal layer between the array substrate and the opposite substrate, wherein liquid crystal molecules within the liquid crystal layer are horizontally aligned on the array substrate when the display panel is operated, and an alignment of the liquid crystal molecules is not substantially changed by the externally provided pressure.

13. A display apparatus comprising:

a display panel comprising;

an array substrate including a plurality of data lines, a plurality of gate lines crossing the data lines, a plurality of first signal lines substantially parallel to the gate lines, a plurality of second signal lines substantially parallel to the data lines, a plurality of pixels defined by gate lines adjacent to each other and data lines adjacent to each other, wherein each of the pixels comprises a pixel electrode and a common electrode insulated from the pixel electrode; and

an opposite substrate combined with the array substrate to receive a liquid crystal layer and including a plurality of connecting members, at least one of the connecting members electrically connected to at least one of the first signal lines and the second signal lines by an externally provided pressure;

a touch position detecting part detecting the first and the second signal lines electrically connected to the connecting member to output a detection signal; and

a position determining part determining position coordinates of the externally provided pressure based on the detection signal.

14. The display apparatus of claim 13, wherein the display panel further comprises a gap-maintaining member maintaining a gap between the array substrate and the opposite substrate.

15. The display apparatus of claim 14, wherein the gap-maintaining member is a column spacer.

16. The display apparatus of claim 13, wherein the array substrate further comprises:

a plurality of first sensing electrodes, each of the first sensing electrodes disposed on a respective one of the first signal lines and electrically connected to a respective one of the first signal lines; and

a plurality of second sensing electrodes, each of the second sensing electrodes disposed on a respective one of the second signal lines and electrically connected to a respective one of the second signal lines.

17. The display apparatus of claim 13, wherein the array substrate further comprises:

a plurality of first sensing electrodes, each of the first sensing electrodes disposed on a respective one of the first signal lines and electrically connected to a respective one of the first signal lines;

a plurality of second sensing electrodes, each of the second sensing electrodes disposed on a respective one of the second signal lines and electrically connected to a respective one of the second signal lines; and

a plurality of third sensing electrodes, each of the third sensing electrodes spaced apart from the first and the second sensing electrodes and overlapped by each of the connecting members.

18. The display apparatus of claim 17, wherein the array substrate further comprises a common voltage line to apply a predetermined voltage to the common electrode, and each of the third sensing electrodes is electrically connected to the common voltage line.

19. The display apparatus of claim 13, wherein the touch position detecting part comprises a voltage controlling part controlling application of an initial driving voltage to the first and the second signal lines.

20. The display apparatus of claim 13, wherein the touch position detecting part comprises a data sampling part detecting voltage variations of the first and the second signal lines and outputting a detection signal when at least one of the connecting members is electrically connected to at least one of the first signal lines and the second signal lines by the externally provided pressure.

21. The display apparatus of claim 20, wherein the data sampling part includes an operational amplifier.

22. A method of preventing display quality deterioration during a touch screen function of a liquid crystal display, the method comprising:

providing an array substrate with a pixel electrode, a common electrode, a first sensing electrode electrically connected to a first signal line, and a second sensing electrode electrically connected to a second signal line;

providing an opposite substrate with an electrically conductive connecting member protruding therefrom;

disposing a liquid crystal layer between the array substrate and the opposite substrate, liquid crystal molecules within the liquid crystal layer being horizontally aligned on the array substrate during operation of the liquid crystal display; and

,

providing an externally provided pressure on the opposite substrate to electrically connect the connecting member to the first and second signal lines via the first and second sensing electrodes on the array substrate, wherein an alignment of the liquid crystal molecules is not substantially altered by the externally provided pressure.