CN1740879A - Fan-out wire area for flat panel displays - Google Patents

Abstract

The fan-out wire area is used for connecting a driving circuit of a flat panel display and a display area and comprises a plurality of first single-layer wires and at least one second single-layer wire. One end of each first single-layer wire is connected to the driving circuit, and the other end of each first single-layer wire is connected to the display area. One end of the second single-layer conducting wire is connected to the driving circuit, and the other end of the second single-layer conducting wire is connected to the display area, wherein the metal layer to which the first single-layer conducting wires belong is different from the metal layer to which the second single-layer conducting wire belongs.

Description

Fan-out wire area for flat panel displays

technical field

The invention relates to a flat display, in particular to a fan-out wire area for the flat display.

Background technique

Flat panel displays, such as liquid crystal displays, plasma displays, etc., have the advantages of high image quality, small size, light weight, and wide application range, so they are widely used in consumer products such as mobile phones, notebook computers, desktop displays, and televisions. Electronic products have gradually replaced traditional cathode ray tube displays and become the mainstream of displays. The so-called large area, high resolution and other requirements have also become the key to the demands of these flat panel displays.

FIG. 1 is a schematic diagram illustrating a conventional structure of a flat panel display. In the flat panel display 100 , the driving chips in the data driving circuit 104 and the scanning driving circuit 106 respectively provide signals to the data lines and the scanning lines in the display area 102 through respective fan-out wire regions 108 . Since the distance between the pins of the driver chip is small and the distance between the data lines or scanning lines is large, the area of the end of the fan-out wire area 108 closer to the driving circuits 104 and 106 will be smaller, and the area of the end closer to the display area 102 will be larger. , thus presenting a fan-shaped area.

FIG. 2 is a schematic diagram illustrating a conventional fan-out conductor area. Generally speaking, the fan-out wire area 108 uses different single-layer metal layers to form the wires 208 according to the different driving circuits 104 or 106 connected thereto. For example, the fan-out wire area 108 connected to the data driving circuit 104, its wire 208 is formed by the second metal layer (Metal II; M2) of the display panel; the fan-out wire area 108 connected to the scan driving circuit 106, its wire 208 is formed by the first metal layer (MetalI; M1) of the display panel.

However, with the improvement of the resolution of the flat panel display and the narrowing of the frame size of the display, the spacing between the wires 208 is also reduced, approaching the limit allowed by the design rule. Furthermore, in order to avoid affecting the signal quality due to different transmission path lengths, the wires 208 in the fan-out wire area 108 sometimes need extra twists and turns to provide transmission paths with equal impedance, which also takes up more space. Therefore, the prior art of using a single metal layer to form all the wires 208 in the same fan-out wire area 108 can no longer meet the current needs and cannot be used to produce higher resolution, thinner size and higher display quality. flat screen display.

Contents of the invention

Therefore, one aspect of the present invention is to provide a fan-out wire area of a flat panel display, which is used to manufacture a flat panel display with higher resolution, thinner size and higher display quality.

According to a preferred embodiment of the present invention, the fan-out wire region includes a plurality of wires. Each wire is composed of a single metal layer, and the metal layer of at least one wire is different from the metal layer of other wires.

According to another preferred embodiment of the present invention, the fan-out wire region is located on a glass substrate of a flat panel display and includes a plurality of wires. The wires are respectively formed by a first metal layer or a second metal layer on the glass substrate, wherein at least one wire is arranged on the first metal layer, at least another wire is arranged on the second metal layer, and each wire is not Will be set across layers.

According to another preferred embodiment of the present invention, the fan-out wire area is used to connect a driving circuit and a display area of a flat panel display, and includes a plurality of first single-layer wires and at least one second single-layer wire. One end of the first single-layer wires is connected to the driving circuit, and the other end is connected to the display area. One end of the second single-layer wire is connected to the driving circuit, and the other end is connected to the display area, wherein the metal layer to which the first single-layer wires belong is different from the metal layer to which the second single-layer wire belongs.

Description of drawings

In order to make the above and other objects, features, advantages and embodiments of the present invention more comprehensible, the accompanying drawings are described in detail below. In the attached picture:

FIG. 1 is a schematic diagram showing the existing structure of a flat panel display;

FIG. 2 is a schematic diagram illustrating an existing fan-out conductor area;

FIG. 3 is a schematic diagram illustrating the structure of a flat-panel display according to a preferred embodiment of the present invention;

FIG. 4A is a schematic diagram illustrating a fan-out wire region according to a preferred embodiment of the present invention;

FIG. 4B is a schematic diagram illustrating a fan-out wire area according to another preferred embodiment of the present invention;

FIG. 4C is a schematic diagram illustrating a fan-out wire region according to another preferred embodiment of the present invention; and

FIG. 5 is a cross-sectional side view illustrating a preferred embodiment of the present invention.

simple notation

100: flat panel display 102: display area

104: Data drive circuit 106: Scan drive circuit

108: Fan-out wire area 208: Wire

300: flat panel display 302: display area

304: Data drive circuit 306: Scan drive circuit

308: Fan-Out Wire Area

408a, 408b, 408c: fan-out conductor area

418: Wire 428: Wire

502: Display area 508: Fan-out wire area

510: glass substrate 518: wire

527: plug 538: connecting line

Detailed ways

The present invention uses different single-layer metal layers to form individual wires in the same fan-out wire area, and improves the distribution density of wires in the fan-out wire area through multiple metal layers and each wire will not be arranged across layers. It is used for making flat panel displays with higher resolution, thinner size and higher display quality.

FIG. 3 is a schematic diagram illustrating the structure of a flat panel display according to a preferred embodiment of the present invention. The flat panel display 300 includes a display area 302 , a data driving circuit 304 and a scanning driving circuit 306 . The flat panel display 300 can be, for example, a liquid crystal display, a plasma display, an organic electroluminescence display, an optical interference display or other suitable flat panel displays.

The driving chips located in the data driving circuit 304 and the scanning driving circuit 306 respectively provide signals to the data lines and the scanning lines in the display area 302 through respective fan-out wire areas 308 . Since the distance between the pins of the driver chip is small and the distance between the data lines or scan lines is large, the area of the fan-out conductor area 308 will be smaller closer to the end of the driving circuit, and the area closer to the end of the display area will be larger, thus presenting a fan-shaped area. .

FIG. 4A is a schematic diagram illustrating a fan-out wire region according to a preferred embodiment of the present invention. The fan-out wire area 408 a includes a plurality of wires 418 and 428 . Each conducting wire 418 is formed solely by the first metal layer M1, and each conducting wire 428 is independently constituted by the second metal layer M2. That is, each wire 418 or 428 is composed of a single metal layer M1 or M2, and the metal layer of at least one wire is different from that of the other wires.

On the one hand, the fan-out wire region 408 a is located on a glass substrate of a flat panel display and includes a plurality of wires 418 and 428 . The wires 418 and 428 are respectively formed by a first metal layer M1 or a second metal layer M2 on the glass substrate, wherein at least one wire (that is, the wire 418) is arranged on the first metal layer M1, and at least another wire (that is, the wire 428) is disposed on the second metal layer M2. Moreover, each wire 418 or 428 will not be arranged across layers, and a single wire must be formed by a single metal layer M1 or M2 alone.

On the other hand, please refer to FIG. 3 and FIG. 4A, the fan-out wire area 408a is used to connect the display area 302 of the flat-panel display 300 and the driving circuit 304 or 306, and includes a plurality of first single-layer wires 418 and at least one The second single-layer wire 428 . One end of the first single-layer wire 418 is connected to the driving circuit 304 or 306 , and the other end is connected to the display area 302 . One end of the second single-layer wire 428 is connected to the driving circuit 304 or 306 , and the other end is connected to the display area 302 .

The first metal layer M1 to which the first single-layer wire 418 belongs is different from the second metal layer M2 to which the second single-layer wire 428 belongs. Furthermore, the single-layer wires 418 and 428 are connected one-to-one to a plurality of pins of the driving circuit 304 or 306 , that is, pins of the driving chip.

FIG. 4B is a schematic diagram illustrating a fan-out wire region according to another preferred embodiment of the present invention. FIG. 4C is a schematic diagram illustrating a fan-out wire region according to another preferred embodiment of the present invention. Referring to FIG. 4A to FIG. 4C , the relationship between different single-layer wires belonging to different single-layer metal layers will be described below.

According to a preferred embodiment of the present invention, the wires 418 and 428 can be repeatedly arranged in a predetermined order in the fan-out wire region 408 a according to the metal layers to which they belong. Even, the two adjacent wires 418 and 428 are located in different metal layers, that is, if one of them is located in the first metal layer M1, the other adjacent to it is located in the second metal layer M2.

As shown in FIG. 4A , the conductive wires 418 and 428 belonging to different single metal layers are arranged alternately, that is, the conductive wire 418 located in the first metal layer M1 is on both sides of the conductive wire 428 located in the second metal layer M2 . Alternatively, as shown in FIG. 4B , the wire 428 of the second metal layer M2 may also be directly above the wire 418 of the first metal layer M1 .

In this way, the minimum distance between the two wires 418 on the first metal layer M1 can be equal to the limit allowed by the design rules, and the minimum distance between the two wires 428 on the second metal layer M2 can also be equal to the minimum allowed by the design rules. limit. Through this arrangement, since the two adjacent wires 418 and 428 belong to different single-layer metal layers M1 and M2, the distance between them can be smaller than the limit allowed by the design rules, so the number of wires in the fan-out wire area can be increased, and Improve the quality of the signal it transmits.

Those skilled in the art can choose the arrangement of the conductive wires 418 and the conductive wires 428 according to the requirements of the design and specifications, and are not limited to the one-to-one corresponding arrangement shown in FIG. 4A or FIG. 4B . As shown in FIG. 4C , a single wire 428 located in the second metal layer M2 can also be arranged between the two wires 418 of the first metal layer M1 and between the two wires 418 to moderately increase the wire density in the fan-out wire area. .

5 is a cross-sectional side view of a preferred embodiment of the present invention, illustrating how the wires located in the first metal layer M1 in the fan-out wire area are connected to the display elements located in the second metal layer M2 in the display area. More specifically, when the connection lines 538 of the display elements (not shown) in the display area 502 are located on the second metal layer M2 above the glass substrate 510 , the lines located on the first metal layer M1 in the fan-out line region 508 518 , form a through hole on the first metal layer M1 and the second metal layer M2 first, and connect to the connection line 538 through the conductive layer 527 connecting the two through holes.

In other words, the single-layer wires included in the fan-out wire area of the above-mentioned preferred embodiment can be connected to the connection lines (such as data lines) located on a metal layer different from the single-layer wires as long as the bonding holes and the conductive layer are used in the display area. or scanline). Therefore, compared with the prior art using wires entirely composed of the second metal layer M2 to connect the data driving circuit, and using wires entirely composed of the first metal layer M1 to connect the scan driving circuit, these preferred embodiments The data driving circuit or the scanning driving circuit can be connected by using a fan-out wire area including different single-layer wires at the same time.

Although the present invention is disclosed above with preferred embodiments, it is not intended to limit the present invention. Those skilled in the art can make some changes and modifications without departing from the spirit and scope of the present invention, so the protection scope of the present invention It shall prevail as defined in the appended claims.

Claims (12)

1. A fan-out conductor area for a flat panel display, comprising: A plurality of wires, each wire is composed of a single metal layer, and the metal layer of at least one wire is different from the metal layer of other wires. 2. The fan-out wire area of a flat panel display as claimed in claim 1, wherein the wires are repeatedly arranged in a predetermined order in the fan-out wire area according to the metal layers to which they belong. 3. The fan-out wire area of a flat panel display as claimed in claim 1, wherein two adjacent wires are respectively formed of different single metal layers. 4. The fan-out wire area of the flat panel display as claimed in claim 1, wherein the wires are located above the glass substrate of the flat panel display. 5. A fan-out wire area located on a glass substrate of a flat panel display, the fan-out wire area comprising: A plurality of wires are respectively formed by a first metal layer or a second metal layer on the glass substrate, wherein at least one wire is arranged on the first metal layer, and at least another wire is arranged on the second metal layer, and Individual wires are not set across layers. 6. The fan-out wire area as claimed in claim 5, wherein the wires are repeatedly arranged in a predetermined order in the fan-out wire area according to the metal layers to which they belong. 7. The fan-out conductor area as claimed in claim 5, wherein two adjacent conductors are respectively formed of different metal layers. 8. A fan-out wire area for connecting a drive circuit and a display area of a flat-panel display, the fan-out wire area comprising: A plurality of first single-layer wires, one end of the first single-layer wires is connected to the driving circuit, and the other end is connected to the display area; and At least one second single-layer wire, one end of the second single-layer wire is connected to the driving circuit, and the other end is connected to the display area, wherein the metal layer to which the first single-layer wires belong is different from that of the second single-layer wire The metal layer to which the wire belongs. 9 . The fan-out wire area as claimed in claim 8 , wherein the single-layer wires are connected one-to-one to a plurality of pins of the driving circuit. 10. The fan-out wire area as claimed in claim 8, wherein the single-layer wires are repeatedly arranged in a predetermined order in the fan-out wire area according to their metal layers. 11. The fan-out conductor region as claimed in claim 8, wherein two adjacent single-layer conductors are located on different metal layers. 12. The fan-out wire region as claimed in claim 8, wherein the single-layer wires are located above the glass substrate of the flat panel display.

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