KR200173165Y1 - Connection structure of flat panel display device - Google Patents

Abstract

The present invention discloses an improved connection structure of a flat panel display device such as a PDP.

Conventionally, in order to connect the auxiliary electrodes to which the common voltage is to be applied to the common, the front end of the auxiliary electrode is connected in a connection pattern so that the outermost auxiliary electrode is connected to the outermost connection electrode of the connector. There was a problem that a separate connection port must be configured for each device standard.

In the present invention, by providing a L-shaped connection end at the outer end of the connection pattern, the pitch of the connection port is uniform, so that the connection port can be configured universally.

Description

Connection structure of flat panel display device

1 is an electrode arrangement diagram of a flat plate device having an auxiliary electrode.

2a and 2b are plan views showing conventional connection structures for common connection of auxiliary electrodes,

3 is a plan view showing a connection structure of the present invention.

Explanation of symbols on the main parts of the drawings

1: connection end

2: extension part

3: connection

P: Substrate

S: auxiliary electrode

Y: (optional) electrode

Y1: (outermost) selection electrode

FPC: Connection

I1, I2: Insulation Sheet

E: connection electrode

E1: Common electrode

The present invention relates to a flat panel display device, and more particularly, to a connection structure for common connection of a common electrode.

As the trend of light and short size of electronic products is gradually increasing, the application area of flat panel display devices is expanding rapidly. Liquid crystal display (LCD) has already become a portable image device and plasma Display devices (PDP, Plasma Display Panel) and electroluminescent devices (FED, Field Emission Display) are being actively developed.

Such a flat panel display device is composed of a segment method for displaying a fixed image and a dot matrix method for displaying an arbitrary image. The dot matrix method is X as shown in FIG. , The two electrodes X and Y cross each other on the two substrates in the Y direction, and the intersections basically have a structure in which each pixel constitutes each pixel.

The dot matrix type flat panel display device is generally driven by a scan method. Since a display of a moving image requires several tens of frames per second, a duty cycle for selecting each pixel is several tens of microseconds. It is very short time.

In particular, in a discharge device such as a PDP, since the discharge is not immediately started when the corresponding pixel is selected, the duration of the discharge is further shortened, resulting in a problem of failing to achieve high luminance.

Accordingly, the auxiliary electrode S, to which a predetermined voltage is applied, is used to improve the light emission luminance by forming charges in advance to quickly initiate discharge and maintaining discharge of the corresponding pixel until the next selection.

Since the auxiliary electrodes S should be arranged for each pixel, they are alternately arranged adjacent to one electrode (for example, Y).

An electrode pad is formed at an end of the substrate to connect the electrodes X, Y, and X to the outside of the sealing space, and the electrode pad of the substrate on which the auxiliary electrode S is formed is provided with an electrode Y and an auxiliary electrode ( S) is alternately drawn out, and a scan or data voltage is selectively applied to each electrode Y, and a predetermined common voltage is applied to the auxiliary electrode S. FIG.

As a result, the electrode pads must be individually connected to each other and the auxiliary electrodes S must be connected to each other. Conventionally, connection structures such as 2a and 2b have been used.

First, as shown in FIG. 2A, the electrode Y and the auxiliary electrode S of the electrode pad are connected to the driving circuit PCB with a connection port FPC such as a flexible panel connector (FPC). In this structure, the connection between the electrode (Y) and the auxiliary electrode (S) is separated and the auxiliary electrode (S) side is connected in common.

This connection structure is complicated by the configuration and connection of the driving circuit (PCB) because the auxiliary circuit (S) has to be connected to the driving circuit (PCB) by providing a dedicated multiplexer or by common jumper wire (jumper wire). There is a problem.

On the other hand, in the configuration of FIG. 2B, the front end of the auxiliary electrode S is drawn outward from the front end of the electrode Y in the electrode pad of the substrate P, and the connection pattern K is laterally disposed between the ends of the respective auxiliary electrodes S. FIG. Cross-extended common connection is performed, and the connection electrode E1 at one end of the connection electrode E of the connection port FPC 'is brought into contact with the external auxiliary electrode S1.

This connection structure does not have the same problem as that of the drive circuit PCB as in the structure of FIG. 2A, but there is a problem that a separate connection port FPC 'needs to be manufactured separately for each device specification.

That is, the connection port FPC 'such as the FPC forms a connection electrode E between the two insulating sheets I1 and I2 by using a copper foil, and the pitch between the other connection electrodes E. Since the pitch d 'of the outer connection electrode E1 for connecting the auxiliary electrode S1 is half of that of d1), a dedicated connection port FPC' must be manufactured and used separately for each element.

In addition, since the common voltage is supplied to one side of the connection pattern K, the common voltage is lowered due to the voltage drop caused by the resistance as it is farther from the connection portion. As a result, in the case of a large sized device, a large luminance difference is generated between the connection part and a part far from it, making it impossible to provide a uniform image.

In view of the above-described problems, an object of the present invention is to provide a connection structure of a flat panel display device capable of using a general-purpose connection port and solving a luminance difference due to voltage drop.

In order to achieve the above object, in the connection structure according to the present invention, the selection electrode and the auxiliary electrode are alternately arranged, and the front end of the auxiliary electrode is drawn outward from the front end of the selection electrode and connected to each other in a cross-sectional connection pattern. In one connection structure, at least one end of the connection pattern has an extension portion extending in the extension direction of the connection pattern and a connection portion bent 90 degrees therefrom and extending in the direction of the selection electrode and the auxiliary electrode. It characterized in that to form.

According to one feature of the present invention, the distance between the connecting portion of the connection end and the center of the outermost selection electrode corresponds to the pitch of the selection electrodes, thereby making it possible to make the pitch of the connection electrode of the connection port such as FPC uniform. It can be used for general purposes.

On the other hand, according to another feature of the present invention, the connection end is provided at both ends of the connection pattern and the common voltage is applied by the connection electrodes at both ends of the connection port. As a result, unevenness in luminance due to voltage drop can be improved.

Such desirable features and other advantages of the present invention will become more apparent from the following description of the preferred embodiments with reference to the accompanying drawings.

In FIG. 3, one substrate P of the flat panel display element supports the functions of the selection electrode Y and the selection electrode Y to distinguish the plurality of electrodes (Y, auxiliary electrodes) to be used for pixel selection. The auxiliary electrodes S are alternately arranged, and are drawn out to the outer ends of the substrates P, respectively, to form electrode pads to be connected to a driving circuit (not shown) by a connection port FPC such as an FPC.

For example, when the device is a PDP, each auxiliary electrode S serves to promote and / or maintain the discharge of the pixel selected by the selection electrode Y by applying a common voltage.

The front end of each auxiliary electrode S extends outward from the front end of the selection electrode Y, and the connection pattern K crosses horizontally between the front ends so that a predetermined voltage is applied to at least one point of the connection pattern K. When supplied, the common voltage is applied to all the auxiliary electrodes S, that is, the common connection is performed.

According to a feature of the present invention, one end of the connection pattern K, preferably at both ends, is selected from an end of the extension part 3 and the extension part 3 extending by a predetermined length in the extension direction of the connection pattern K. An approximately L-shaped connecting end 1 having a connecting portion 2 which is bent by 90 ° in the extending direction of the electrode Y or the auxiliary electrode S and extended by another predetermined length is formed.

Although the selection electrode (Y) and the auxiliary electrode (S), and the connection pattern (K) and the connection end (1) has been described functionally separated, it can be formed at the same time by the printing of the conductive paste in the manufacturing of the device.

On the other hand, the extension length of the extension part 3 or the distance between the connection part 2 and the center of the electrode S or Y1 at the outer end adjacent thereto is set to make the pitch between the connection electrodes E and E1 uniform in the connection port FPC. It is desirable to be.

That is, when the outermost electrode inside the connection end 1 is the selection electrode Y1 as shown, the distance d between the center of the connection portion 2 of the connection end 1 and the outermost selection electrode Y1 d. Is set equal to the pitch d of the select electrodes Y. On the other hand, even when the outermost electrode inside the connection terminal 1 is the auxiliary electrode S, the distance d between the center of the selection electrode Y1 and the connection portion 2 immediately inside is the pitch of the selection electrodes Y. d1).

The reason is that the connecting electrodes F of the connection port FPC are connected in a 1: 1 correspondence with respect to each selection electrode Y of the electrode pad of the substrate P, so that the connection part 2 of the connection end 1 is closest to the selection electrode Y. When the distance d between the centers of the external selection electrodes Y1 is equal to the pitch d1 of the selection electrodes Y, the connection electrodes E to be connected to the selection electrodes Y on the connection port FPC are connected. This is because the pitches of all the connection electrodes E and E1 including the connection electrode E1 to be connected to the stage 1 can be set to d1 constantly.

According to such a structure, the connection port FPC can be used universally with respect to the element of the same electrode pitch. In other words, the pitch of the connection electrodes E of the connection port FPC is different from the conventional configuration of FIG. When the connection port (FPC) of the required width is delivered, the connection port (FPC) of the corresponding standard can be obtained, so that it can be used universally.

On the other hand, the connection port FPC such as FPC forms the connecting electrodes E and E1 with copper foil on one insulating sheet I1, and the other insulating sheet I2 having a shorter length than the upper insulating sheet I1 is formed thereon. The connection port FPC is actually joined to the electrode pad of the board | substrate P by the electrically conductive adhesive etc. in the state which turned over 180 degree in the state shown in figure.

Here, the front end of the auxiliary electrode S and the connection pattern K are insulated with the insulating sheet I2 on the upper side (actually the lower side) of the drawing, and the connection electrode E exposed on the other insulating sheet I1. The front end is contacted with the front ends of the selection electrodes Y and Y1, respectively.

Accordingly, it is preferable that the inner end of the connection portion 2 of the connection end 1 extends to the inner side than the outer end of the selection electrode Y. Then, the connection electrodes E and E1 of the connection port FPC are connected to each of the selection electrode Y and the connection end 1, respectively, without the insulated sheet I2 being cut out so that the entire substrate P can be connected. do.

On the other hand, the connection end 1 of the present invention is preferably formed at both ends of the connection pattern (K). Each connection terminal 1 is connected to the connection electrode E1 at both ends of the connection port FPC to receive the same common voltage. Then, since the same potential is supplied at both ends of the connection pattern K, the substrate P is large. In this case, the problem of luminance unevenness due to voltage drop can be greatly alleviated.

As described above, according to the present invention, if the same pitches of the connection ports FPC are the same between the select electrodes Y, the devices can be commonly used in devices of any standard, thereby reducing the manufacturing cost and connection man-hour of the connection ports FPC. It is possible to realize a great effect in realizing a flat panel display device having excellent characteristics such as uniform luminance.

Claims (5)

A plurality of selection electrodes for driving pixels and auxiliary electrodes to which a common voltage is applied are alternately arranged, and leading ends of the auxiliary electrodes are drawn outward from the ends of the selection electrodes and connected to each other in a connection pattern transversely. In the connection structure of a flat panel display element, at least one end of the connection pattern K extends in the extending direction of the connection pattern K, and is bent by 90 degrees from the selection electrode (B). A connecting structure (1) having a L-shape having a connecting portion (1) having a connecting portion (2) extending in the direction of Y, Y1 and the auxiliary electrode (S). The center distance d between the connection portion 2 of the connection terminal 1 and the selection electrode Y1 at the outermost end of the plurality of selection electrodes Y and Y1 is the plurality of selection electrodes. A connection structure of a flat panel display element, characterized by the same as the pitch d of (Y). The flat panel display element connection structure according to claim 1, wherein the connection end (1) is provided at both ends of the connection pattern (K). 2. The connection electrodes E of claim 1, wherein the connection electrodes E and E1 are formed between two insulating sheets I1 and I2 having different lengths. Is connected to a driving circuit in a one-to-one configuration, and the auxiliary electrodes S are connected to the connection electrode E1 at the outermost end of the connection port FPC by the connection terminal 1 in common contact. Connection structure of flat panel display element. 5. A flat panel display element connection structure according to claim 4, wherein an inner end of the connection portion (2) of the connection end (1) extends inwardly than an outer end of the selection electrode (Y).