CN100353215C - Wiring structure and flat panel display - Google Patents

Abstract

A wiring structure comprises a plurality of wires connected between a plurality of pixel terminals and a plurality of signal terminals of a flat panel display, each wire comprises a first material part and a second material part, and the impedance of the first material part is different from that of the second material part, and each wire has equal impedance value by using the characteristics, thereby achieving the purpose of synchronously transmitting signals, and preventing the flat panel display from generating asynchronous signals due to different impedance values of each wire, thereby causing unstable display images.

Description

Wiring structure and flat panel display

【Technical field】

The present invention relates to a wiring structure, in particular to a wiring structure with a plurality of wires made of two-phase heterogeneous materials with the same impedance.

【Background technique】

Generally, flat panel displays, such as liquid crystal displays (LCD), need to provide signal transmission paths through multiple wires when various integrated circuits (IC) transmit signals to pixel terminals. As the display screen of liquid crystal displays becomes larger and larger, As a result, the panel is getting bigger and bigger, which causes the pitch of the pixel terminals to be greater than the pitch of the signal terminals of the integrated circuit itself. Different pitches make the length of each wire used to transmit signals different, resulting in different impedances. This situation affects the display quality.

FIG. 1 shows a schematic diagram of a known wiring structure. The traditional wire configuration method is shown in Figure 1. Traditionally, a single material is used for one-stage wiring. Due to the different characteristics of the pixel terminal pitch P ₁ of the liquid crystal display and the signal terminal pitch P ₂ of the integrated circuit, As a result, the wiring distances between the pixel terminals G ₁ -G _N+1 and the signal terminals T ₁ -TN ₊₁ are not equal, resulting in different wiring impedances and affecting the display quality. FIG. 2 shows a schematic diagram of another known wiring structure. As shown in Figure 2, although it has been changed to two-stage wiring, even if the wiring width is adjusted one by one, it is difficult to achieve the same wiring impedance due to the limitation of the internal wiring space of the LCD, which will still affect the display quality.

【Content of invention】

Therefore, the main object of the present invention is to provide a wiring structure, especially related to a wiring structure using a plurality of wires made of two-phase heterogeneous materials having the same impedance.

In order to achieve the above object, the present invention proposes a wiring structure, which is connected between a plurality of pixel terminals and a plurality of signal terminals of a flat-panel display, each wire includes a first material part and a second material part, and the second The impedances of the first and second material parts are different, and each conductor adopts a two-section straight line configuration, and has a turning point to define each conductor as a first line segment and a second line segment; wherein, the first line segment of each conductor The first line segments of each wire are parallel to each other, and the second line segments of each wire are parallel to each other; the first material part and the second material part of each wire are connected by a connecting part, and the connecting part of each wire is arranged on the first line The connecting part of the segment or each wire is set on the second line segment, and the above-mentioned characteristics are used to make each wire have an equal impedance value, so as to achieve the purpose of synchronous signal transmission, so that the flat-panel display will not be affected by the impedance value of each wire. Different signals are not synchronized, resulting in unstable display images.

The present invention also proposes a flat-panel display, which includes: a panel for displaying images, including at least a plurality of pixel terminals; a plurality of integrated circuits for driving the panel, at least including a plurality of signal terminals, the signal terminals The pitch of the pixel terminals is smaller than the pitch of the pixel terminals; a wiring structure includes a plurality of wires connected between the pixel terminals and the signal terminals, and each wire includes a first material part and a second material part, the impedances of the first and second material parts are different, and each wire has an equal impedance value, and each wire adopts a two-section straight line configuration, and has a turning point to connect each The wire is defined as a first line segment and a second line segment; wherein, the first line segment of each wire is parallel to each other, and the second line segment of each wire is parallel to each other; the first material part and the second material part of each wire The connection is via a continuation portion, and each continuation portion of the conductor is disposed on the first line segment or each conductor continuation portion is disposed on the second line segment.

In order to make the above objects, features, and advantages of the present invention more comprehensible, several preferred embodiments are exemplified below and described in detail in conjunction with the accompanying drawings.

【Description of drawings】

Figure 1 shows a schematic diagram of a known wiring structure;

FIG. 2 shows a schematic diagram of another known wiring structure;

Fig. 3 represents the schematic diagram of wiring structure of the present invention;

Fig. 4 represents the disposition diagram of the connection part of the present invention;

FIG. 5 shows a block diagram of the flat panel display of the present invention.

Symbol Description:

10-connection part, 20-first material part, 30-second material part, 40-flat panel display, 50-panel, 60-integrated circuit (IC), L ₁ ~ L _N+1 - multiple wires, G ₁ ～G _N+1 - a plurality of pixel terminals, T ₁ ～T _N+1 - a plurality of signal terminals, P ₁ - the pitch of a plurality of pixel terminals, P ₂ - the pitch of a plurality of signal terminals, W ₁ - the first line segment, W ₂ - the second line segment.

【Detailed ways】

Embodiment one:

FIG. 3 shows a schematic diagram of the wiring structure of the present invention. As shown in Figure 3, the wiring structure includes a plurality of wires L ₁ -L _N+1 connected to a plurality of pixel terminals G ₁ -G _N+1 and a plurality of signal terminals T ₁ -T _{N+1 of} the flat-panel display Each of the wires L ₁ ~L _N+1 includes a first material part 20 and a second material part 30, and the impedances of the two material parts are different, wherein each wire L ₁ ~L _N+1 adopts two Segmented straight line configuration, and has a turning point to define each wire L ₁ ~ L _N+1 as a first line segment W ₁ and a second line segment W ₂ ; the first line segment of each wire L ₁ ~ L _N+1 The line segments W ₁ are parallel to each other, and the second line segments W ₂ of the wires L ₁ to L _N+1 are parallel to each other, and a connecting portion 10 is further provided on the first line segment W ₁ to connect the first material of each wire The portion 20 and the second material portion 30 use the above characteristics to make each of the wires L ₁ -L _N+1 have equal impedance values.

Fig. 4 is a diagram showing the configuration of the connection part of the present invention. As shown in Figure 4, in order to make each wire L ₁ ~L _N+1 have an equal impedance value, the first material part 20 and the second material part 30 at both ends of the wire are deducted by using the principle of the same length in the parallel line direction, Calculated by the remaining length, it can be seen from Figure 4 that the distance a in the oblique direction must be greater than the distance b in the straight direction. This phenomenon can ensure that the configuration of the connection part 10 must be on a straight line extending in the direction of the signal terminal, and can also ensure the configuration space of the connection part 10 It will not be affected by the movement of the wire in the oblique direction.

After determining the connection part 10, it can be seen that each wire L ₁ ~ N _{+ 1} is composed of the first material part 20 and the second material part 30, and the impedance of each wire L ₁ ~ L _N+1 can be completely equal. , where, if you want to obtain the same characteristics of the impedance of each wire, the values of the parameters in Figure 4 can be obtained by the following formula, a/WA×x=(bc)/WA×x+c/WB×mx, then have to

c=(a-b)×WB/m×WA-WB, where

c: the straight-line distance from the first material part 20 of b

WA: Line width of the second material part

WB: Line width of the first material part

x: resistivity of the second material part

mx: resistivity of the first material part

Referring to the first wire L ₁ , use the formula to obtain the configuration position of the connection part 10 of another wire L _N+1 , and it can also be under different conditions, such as the first material part 20 and the second material part 30 have different line widths , You can also use the above formula to obtain the same result for each wire impedance.

Embodiment two:

FIG. 5 shows a block diagram of the flat panel display of the present invention. As shown in FIG. 5 , the flat panel display 40 includes a panel 50 for displaying images, including at least a plurality of pixel terminals G ₁ -G _N+1 , and a plurality of integrated circuits 60 for driving the panel 50 , including at least a plurality of signal terminals. T ₁ to T _N+1 , the pitch P ₂ of the signal terminals is smaller than the pitch P ₁ of the pixel terminals, one wiring structure includes a plurality of wires L ₁ to L _N+1 , and a plurality of wires L ₁ ~L _N+1 is connected between the pixel terminals G ₁ ~G _N+1 and the signal terminals T ₁ ~T _N+1 , and each wire L ₁ ~L _N+1 includes a first material part 20 and a second material part 30, the impedances of the two material parts are different, and each wire L ₁ ~ L _N+1 has the same impedance value, the principle of its wiring structure is as shown in the first embodiment, using the above characteristics Make each wire L ₁ ~L _N+1 have the same impedance value, so as to achieve the purpose of synchronous signal transmission, so that the flat panel display 40 will not produce different signals due to the different impedance values of each wire L ₁ ~L _N+1 Synchronization, resulting in unstable display images.

Although the present invention is described above through two preferred embodiments, they do not limit the present invention, and any person skilled in the art can make changes and modifications without departing from the spirit and scope of the present invention Therefore, the protection scope of the present invention should be determined by the appended claims.

Claims (2)

1, a kind of distribution structure is applicable to flat-panel screens, and this flat-panel screens comprises a plurality of pixel terminals and a plurality of signal terminal at least, and wherein, the pitch of described pixel terminal is greater than the pitch of described signal terminal, and this distribution structure comprises:

A plurality of leads, be connected between described pixel terminal and the described signal terminal, each lead comprises one first material part and one second material part, the impedance difference of this first and second materials part, and each lead has equal resistance value, each lead adopts the configuration mode of two-part straight line, and has a turning point each lead is defined as one first line segment and one second line segment;

Wherein, first line segment of each lead is parallel to each other, and second line segment of each lead is parallel to each other; First material part of each lead is connected by the part that continues with second material part, and the part that continues of each lead all is arranged on this first line segment or the part that continues of each lead all is arranged on this second line segment.

2, a kind of flat-panel screens comprises:

A panel in order to show image, comprises a plurality of pixel terminals at least;

A plurality of integrated circuit in order to drive this panel, comprise a plurality of signal terminals at least, and the pitch of this signal terminal is less than the pitch of described pixel terminal;

A distribution structure, comprise a plurality of leads, described a plurality of lead is connected between described pixel terminal and the described signal terminal, each lead comprises one first material part and one second material part, the impedance difference of this first and second materials part, and each lead has equal resistance value, and each lead adopts the configuration mode of two-part straight line, and has a turning point each lead is defined as one first line segment and one second line segment;

Wherein, first line segment of each lead is parallel to each other, and second line segment of each lead is parallel to each other; First material part of each lead is connected by the part that continues with second material part, and the part that continues of each lead all is arranged on this first line segment or the part that continues of each lead all is arranged on this second line segment.

Images