KR20010039307A - Field emission display - Google Patents

Abstract

PURPOSE: A field emission display is provided to use driving circuit easily, to improve emission efficiency, to reduce much of leakage between pixel comparing the existing three line RGB driving method by driving RGB using two line method. CONSTITUTION: A panel has many of cathode line and many of gate line to be orthogonal with cathode line and many of anode line that is installed on the top in a definite interval with many of gate line. R and B line of cathode line is connected horizontally in common. Odd cathode line has many of electrode structure that G line is made a predetermined shift and located specially against above G line. Even cathode line has electrode structure to be opposite to the structure of above odd cathode line. R and B line between adjacent gate line is connected mutually in a zigzag at above gate line. G line between adjacent gate line is connected mutually in a zigzag. Above anode line has definite number of terminal and does a switching motion.

Description

Field emission display

FIELD OF THE INVENTION The present invention relates to field emission displays, and more particularly, to field emission displays adapted to implement RGB using two lines.

One pixel of a conventional field emission display (FED) consists of a cathode, a gate, and an anode portion, and the anode portion and the cathode portion are divided into R / G / B, respectively, and the R / G / B of the anode portion The electrodes of the phosphor are commonly connected. And, the cathode portion is divided electrodes are used to transfer the video signal to each R / G / B line.

An example of a conventional field emission display device (see USP 5,160,871) has a configuration as shown in FIG.

The field emission display of FIG. 1 has a structure in which the duty ratio is reduced to 1/4 by dividing the cathode 14 in the gate direction. In other words, the gate electrodes 15 are bundled in four lines at the same time and scanned in the form of a common bus 16 to reduce the duty ratio.

In Fig. 1, on the insulating substrate 10, terminal lead members 11a and 11b, such as films, an insulating layer 12 having through holes, and a base electrode 13 in response to video signals from an external circuit. And a cathode 14 for generating an electron beam in response to the video signal.

The base electrode 13 is electrically connected to the terminal lead members 11a and 11b through the conductive member 17, respectively. That is, the base electrode 13a is connected to the terminal lead member 11a and the base electrode 13b is connected to the terminal lead member 11b.

The cathode 14 is configured to face the gate electrode 15 while maintaining a predetermined interval on the base electrode 13. The gate electrodes 15 are continuously arranged in the vertical direction (arrow B) of the screen of the image display device to switch the scanning lines.

The terminal lead member 11a is continuously aligned in the horizontal direction (arrow A) according to a predetermined pitch, and extends from the end portion of the insulating substrate 10 to the center portion.

The length of the terminal lead member 11b disposed on the terminal lead member 11a to be electrically insulated from the terminal lead member 11a is shorter than the length of the terminal lead member 11a.

In the above-described field emission display of FIG. 1, the cathode 14 is divided into four layers and the gate electrodes are simultaneously connected by four lines to be electrically connected to one of the common buses 16. For example, the resolution of 640x480 Assuming that the panel with 4 is divided into 4, the effect is reduced to a resolution of 640 × 120. That is, since the duty ratio of 640 × 480 becomes 1/480 and the duty ratio of 640 × 120 becomes 1/120, the improvement of the duty ratio increases the brightness of the screen by four times during driving.

However, according to the field emission display of FIG. 1 described above, a process of forming a gate electrode pad by overlapping a large number of gate lines is complicated, and a contact between a base electrode and an electrode providing a video signal is complicated. The problem is that the resistance between the cathode line and the metal tip which is the electron emission source increases. The image quality is lowered because crosstalk cannot be prevented for each phosphor.

In addition, according to the field emission display of FIG. 1, since the pad has a stacked structure, electrical contact between the upper pad and the lower pad is difficult, and since the pad has a two-layer structure, it is difficult to connect with the driving stage.

In addition, the laminated structure in FIG. 1 described above requires a further process in the existing process, thereby causing a problem in that the manufacturing process becomes complicated.

In addition, the configuration of FIG. 1 is relatively inefficient due to the increase in the number of pads used and the number of pads is increased due to the increase in the number of cathode pads. There are many problems.

Accordingly, an object of the present invention is to provide a field emission display device which reduces crosstalk between pixels of an anode and reduces the effective pad area by reducing the number of pads of a cathode. .

Another object of the present invention is to provide a field emission display device which reduces power consumption of a driving stage and enables dividing driving without using a diaphragm structure within the current effective area.

In order to achieve the above objects, a field emission display device according to an exemplary embodiment of the present invention is provided on a plurality of cathode lines, a plurality of gate lines orthogonal to the cathode lines, and a plurality of gate lines disposed above the gate lines. A field emission display having a panel with a plurality of anode lines, wherein

The cathode line is opposite to the odd-numbered cathode line and the odd-numbered cathode line structure having a plurality of electrode structures in which R and B lines are horizontally connected in common and G lines are separately shifted by a predetermined value with respect to the R line. Consists of even-numbered cathode lines with an electrode structure,

R and B lines between neighboring gate lines in the gate line are zigzag interconnected, and G lines between neighboring gate lines are zigzag interconnected.

The anode line is characterized in that the switching operation with a certain number of terminals.

1 is a view showing an arrangement of an electron beam generating portion of a conventional field emission display;

2 is a front view of an RGB formed on a cathode according to an embodiment of the present invention,

3 shows an arrangement of gates for an emitter array in accordance with an embodiment of the present invention;

4 is a view showing an arrangement of an anode and a cathode according to an embodiment of the present invention,

5 is a front view showing a state in which a cathode, a gate, an anode, and a pixel are arranged according to an embodiment of the present invention;

6 to 21 illustrate pixel driving of a field emission display device according to an exemplary embodiment of the present invention;

22 is a timing diagram of an anode switching pulse and a gate scan pulse applied to an embodiment of the present invention.

<Explanation of symbols for the main parts of the drawings>

10: insulated substrate 11a, 11b: terminal lead member

12: insulation layer 13, 13a, 13b: base electrode

14 cathode 15 gate electrode

16: common bus

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

2 is a front view of an RGB formed over a cathode according to an embodiment of the invention. In Fig. 2, the odd-numbered cathode lines are positioned with the R and B lines horizontally connected in common, and the G lines are shifted about 1/2 of the R lines separately below them. The odd-numbered cathode lines have a plurality of RGB line structures of this type.

The even-numbered cathode lines have an electrode structure opposite to the odd-numbered cathode line structures. That is, in the RGB configuration of the even-numbered cathode line, only the G line is located on the line corresponding to the R- and B-line of the odd-numbered cathode line, and the R and B lines are separately horizontally connected in common below. The even-numbered cathode lines have a plurality of RGB line structures of this type.

3 illustrates an arrangement of gates for an emitter array in accordance with an embodiment of the present invention. In Fig. 3, the R and B lines between adjacent gate lines are zigzag interconnected, and the G lines between mutually adjacent gate lines are zigzag interconnected. The sort order follows the order of the numbers on the array. The gate lines are scanned according to a number group, and the order thereof is 1, 2, 3, 2, 3, 2, 3, ..., 2, 3, 1 in order.

In Fig. 3, the first and last gate lines are connected in the same array as 1, and the other gate lines are connected in the array of 2 and 3.

4 is a view showing an arrangement of an anode and a cathode according to an embodiment of the present invention. In FIG. 4, the anode has two terminals A and B and performs repeated switching in the order of A and B. When the terminal A occupies 2/3 of the time of one screen frame time, the terminal B occupies 1/3 and switches repeatedly.

Accordingly, the cathode, gate, anode, and pixels are arranged as shown in FIG. 5 by the above-described configuration.

In the present invention, when the conventional resolution is 640 x RGB x 480, 1920 lines are required at the cathode and 480 lines are required at the gate. However, using the structure of the embodiment of the present invention, the cathode requires 1280 lines and the gate requires 480 lines. That is, the use of the number of cathode pads is reduced without increasing the number of gate pads, thereby ensuring a stable pad spacing.

In the case of the conventional bi-division driving, it is difficult to secure the pad area due to the increase in the number of pads, so that it is difficult to drive it without using the layer structure shown in FIG. 1, but using the structure of the embodiment of the present invention, Sufficient pad space for the divided drive is secured to allow the divided drive.

On the other hand, as shown in Figure 5 in order for the pixel to emit light on the entire screen, the following driving operation.

First, when the anode terminal A is collectively turned on and the gate scans the first gate line as shown in FIG. 6, the G line of the cathode is selected and the first line of the gate emits light at the anode. Subsequently, as shown in FIG. 7, the third gate line is scanned, at which time the G line of the cathode is selected and the second and third lines of the gate emit light at the anode. Thereafter, as shown in FIG. 8, the fifth gate line is scanned, at which time the G line of the cathode is selected and the fourth and fifth lines of the gate emit light at the anode.

Then, as shown in FIG. 9, when the seventh gate line is scanned, the G line of the cathode is selected, and the sixth and seventh lines of the gate emit light at the anode. Next, as shown in FIG. 10, when the ninth gate line is scanned, the G line of the cathode is selected, and the eighth and ninth lines of the gate emit light at the anode. Scanning to the final G gate line in this manner results in FIG. 11.

Then, as shown in FIG. 12, the second gate line is scanned, wherein the cathode's R / B (the first B of the gate and the second R of the gate) emits light at the anode. Subsequently, as shown in FIG. 13, when the fourth gate line is scanned, the cathode R / B (the third B of the gate and the fourth R of the gate) emits light at the anode. Then, as shown in FIG. 14, the sixth gate line is scanned, wherein the cathode R / B (the fifth B of the gate and the sixth R of the gate) is emitted from the anode. Then, as shown in FIG. 15, when the eighth gate line is scanned, the cathode R / B (the seventh B of the gate and the eighth R of the gate) emits light at the anode. Then, as shown in FIG. 16, when the tenth gate line is scanned, the R / B of the cathode (the ninth B of the gate and the tenth R of the gate) emits light at the anode.

Then, when the anode terminal A is turned off, the anode terminal B is turned on, and the second gate line is scanned again as shown in FIG. 17, the R / B of the cathode (the first R of the gate and the second B of the gate) becomes Light is emitted from the anode. 18, when the fourth gate line is scanned, the cathode R / B (the third R of the gate and the fourth B of the gate) emits light at the anode. And, as shown in FIG. 19, the sixth gate line is scanned, wherein the cathode's R / B (the fifth R of the gate and the sixth B of the gate) is emitted from the anode.

Thereafter, as shown in FIG. 20, when the eighth gate line is scanned, the R / B of the cathode (the seventh R of the gate and the eighth B of the gate) is emitted from the anode. As shown in FIG. 21, when the tenth gate line is scanned, the R / B of the cathode (the ninth R of the gate and the tenth B of the gate) is emitted from the anode.

22 is a timing diagram of an anode switching pulse and a gate scan pulse applied to an embodiment of the present invention.

When the anode terminal A is turned on, the gate G line is scanned at the time T1, and video information of the green G is transmitted at the time T1. In addition, the gate BR line is scanned at time T2, and video information of blue (B) and red (R) is transmitted at the time T2. When the anode terminal B is turned on, the gate RB is scanned at time T3, and video information of red (R) and blue (B) is transmitted at the time T3. As the RGB video information is sequentially transmitted, crosstalk between pixels emitting from the anode is minimized.

According to the present invention as described above, since the two-line system is used to drive RGB, it is easier to use the driving circuit than the conventional three-line RGB driving method, and the luminous efficiency can be improved, and crosstalk between pixels is substantially eliminated. You can.

In addition, according to the present invention, the effective area of the pad is reduced compared to the conventional RGB thin line, thereby reducing the line resistance, and the number of cathode lines is reduced because the two lines are used to configure the pixels, thereby driving the cathode line. The number can be reduced.

Meanwhile, the present invention is not limited only to the above-described embodiments, but may be modified and modified within the scope not departing from the gist of the present invention, and the technical idea due to such modifications and variations is within the scope of the following claims. Should be seen.

Claims (3)

A field emission display device comprising: a panel having a plurality of cathode lines, a plurality of gate lines orthogonal to the cathode lines, and a plurality of anode lines disposed above the plurality of gate lines at a predetermined distance; The cathode line is opposite to the odd-numbered cathode line and the odd-numbered cathode line structure having a plurality of electrode structures in which R and B lines are horizontally connected in common and G lines are separately shifted by a predetermined value with respect to the R line. Consists of even-numbered cathode lines with an electrode structure, R and B lines between neighboring gate lines in the gate line are zigzag interconnected, and G lines between neighboring gate lines are zigzag interconnected. And the anode line has a predetermined number of terminals for switching operation. The method of claim 1, And the G line is shifted about 1/2 of the R line. The method of claim 1, And wherein the anode line has two terminals and repeatedly switches.