CN112071255A - a display panel - Google Patents

Abstract

The present invention relates to a display panel, comprising multiple groups of wirings in a display area, wherein each group of the wirings includes a first wiring, a second wiring and a third wiring, and the first wiring has Different signal types from the second and third traces, which are arranged adjacent to the first trace, the length of the second trace and the The ratio of the distance between the second trace and the first trace is equal to the ratio of the length of the third trace to the distance between the third trace and the first trace, and the second trace The line and the third trace have different signals with the same frequency, the same high and low levels, and a phase difference of 180°. The invention has simple process and low cost, and can well eliminate the coupling effect caused by the lateral capacitance between adjacent wirings.

Description

a display panel

technical field

The present invention relates to the field of display, in particular to a display panel.

Background technique

其中，C为侧向电容，A为介电常数相关的常数，S为两条走线相对应的走线面积，d为两条走线之间的距离)。侧向电容的存在导致两条线的信号相互耦合，最终影响显示。As the integration of display panels increases, it is inevitable that two different signal traces are closely routed side by side. When the two traces are close together and have a long length (usually the entire panel length), the lateral capacitance between the two cannot be ignored (

Among them, C is the lateral capacitance, A is the constant related to the dielectric constant, S is the trace area corresponding to the two traces, and d is the distance between the two traces). The presence of lateral capacitance causes the signals of the two lines to couple to each other, which ultimately affects the display.

For example, the document CN110579920A discloses a display panel, including gate lines and data lines that are crisscrossed, sub-pixel units defined by the intersection of the gate lines and the data lines, and a first TFT switch located at the intersection of the gate lines and the data lines , a signal line arranged in parallel with the data line, etc., which realizes a narrower frame of the display panel and a more flexible display area shape. However, since the signal line (the clock signal line CKn, n is an integer ≥ 1) in the above solution is arranged in the display area and is arranged in parallel with the data line, the two lines are relatively close in distance and the length is the entire panel length, resulting in two Lateral capacitance is generated between them, which causes mutual coupling effect, and finally appears in the display problems such as vertical stripes under the macroscopic picture and uneven brightness and darkness of the pixels under the microscopic picture.

SUMMARY OF THE INVENTION

The present invention provides a display panel capable of overcoming the effects of lateral capacitance and coupling between adjacent signal lines.

Specifically, the present invention provides a display panel, which includes multiple groups of wirings in a display area, each group of the wirings includes a first wiring, a second wiring and a third wiring, and the first wiring has a The second trace and the third trace have different signal types, the second trace and the third trace are arranged adjacent to the first trace, and the length of the second trace is the same as the length of the first trace. The ratio of the distance between the second trace and the first trace is equal to the ratio of the length of the third trace to the distance between the third trace and the first trace, and the second trace and the third trace have different signals with the same frequency, the same high and low levels, and a phase difference of 180°.

Preferably, the distances between the second wiring and the third wiring are equal to the first wiring, and the lengths of the second wiring and the third wiring are the same.

Preferably, the second wiring and the third wiring are respectively located on the same side of the first wiring.

Preferably, the second wiring and the third wiring are located on two sides of the first wiring, respectively.

Preferably, the display area is divided into a first display area and a second display area, the second wiring runs through the first display area, and the third wiring runs through the second display area.

Preferably, both the second wiring and the third wiring run through the entire display area.

Preferably, the second wiring and the third wiring are respectively parallel to the first wiring.

Preferably, the first wire is a data wire, and the second wire and the third wire are signal wires.

Preferably, the second wiring and the third wiring are clock signal lines.

Beneficial effects:

In the present invention, one of the two wirings that are close to each other is set as two different wirings with signals with the same frequency, the same high and low levels, and a phase difference of 180°. The coupling effects of different traces to another trace cancel each other out, eliminating the coupling effect caused by side capacitance between the two traces originally close to each other, thereby improving the image quality. The invention has simple process and low cost, and can well eliminate the coupling effect between adjacent wirings.

Description of drawings

1 is a schematic diagram of Embodiment 1 of the present invention;

2 is a schematic diagram of Embodiment 2 of the present invention;

FIG. 3 is a schematic diagram of Embodiment 3 of the present invention.

Reference number:

AA display area; 1 the first line; 2 the second line; 3 the third line.

Detailed ways

In order to more clearly describe the embodiments of the present invention or the technical solutions in the prior art, the specific embodiments of the present invention will be described below with reference to the accompanying drawings. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative efforts, and obtain other implementations.

In order to keep the drawings concise, the drawings only schematically show the parts related to the present invention, and they do not represent its actual structure as a product. In addition, in order to make the drawings concise and easy to understand, in some drawings, only one of the components having the same structure or function is schematically shown, or only one of them is marked. As used herein, "one" not only means "only one", but also "more than one".

1-3 show schematic diagrams of specific embodiments of the present invention: a display panel, comprising multiple groups of wirings in the display area AA, each group of the wirings includes a first wiring 1, a second wiring 2 and The third trace 3, the first trace 1 has a different signal type from the second trace 2 and the third trace 3, the second trace 2 and the third trace 3 are the same as the second trace 2 and the third trace 3. A trace 1 is arranged adjacently, and the ratio of the length of the second trace 2 to the distance between the second trace 2 and the first trace 1 is equal to the length of the third trace 3 and the The ratio of the distance between the third trace 3 and the first trace 1.

The second trace 2 and the third trace 3 have different signals with the same frequency, the same high and low levels, and a phase difference of 180°.

其中，C为侧向电容，A为介电常数相关的常数，d为两条走线之间的距离，S为两条走线相对应的走线面积，S＝LW，其中，L为两条走线对应处的长度，W为两条走线对应处的走线厚度，具体的，本发明中，所述第二走线2和所述第一走线1之间的第一侧向电容为C1，所述第二走线2的长度为L1，所述第二走线2的厚度为W1，所述第二走线2与所述第一走线1之间的距离为d1，所述第三走线3和所述第一走线1之间的第二侧向电容为C2，所述第三走线3的长度为L2，所述第三走线3的厚度为W3，所述第三走线3与所述第一走线1之间的距离为d2，由于走线厚度相当，即W1和W2近似相等，因此，当L1/d1＝L2/d2时，C1≈C2，由于所述第二走线2和第三走线3的信号之间相位差为180°，这两个不同信号将所述第一侧向电容C1和第二侧向电容C2产生的耦合效应相互抵消，最终实现正常的显示。According to the calculation formula of lateral capacitance

Among them, C is the lateral capacitance, A is the constant related to the dielectric constant, d is the distance between the two traces, S is the trace area corresponding to the two traces, S=LW, where L is the two traces is the length of the corresponding part of the two traces, and W is the trace thickness of the corresponding part of the two traces. Specifically, in the present invention, the first lateral direction between the second trace 2 and the first trace 1 The capacitance is C1, the length of the second trace 2 is L1, the thickness of the second trace 2 is W1, the distance between the second trace 2 and the first trace 1 is d1, The second lateral capacitance between the third trace 3 and the first trace 1 is C2, the length of the third trace 3 is L2, the thickness of the third trace 3 is W3, The distance between the third trace 3 and the first trace 1 is d2. Since the thickness of the traces is the same, that is, W1 and W2 are approximately equal, therefore, when L1/d1=L2/d2, C1≈C2 , since the phase difference between the signals of the second trace 2 and the third trace 3 is 180°, the two different signals will cause the coupling effect generated by the first lateral capacitor C1 and the second lateral capacitor C2 They cancel each other out and finally achieve a normal display.

Preferably, the distances between the second wiring 2 and the third wiring 3 and the first wiring 1 are equal. The lengths of the second wiring 2 and the third wiring 3 are equal.

The first wire 1 may be a data wire, and correspondingly, the second wire 2 and the third wire 3 are signal wires.

Further, the second wire 2 and the third wire 3 may be clock signal wires.

Further, the second wiring 2 is routed from the side non-display area, so as to be connected to the driver IC, and the third wiring 3 is directly connected to the driver IC.

FIG. 1 specifically shows the first embodiment of the present invention, wherein the display area AA includes a first display area and a second display area, and the second wiring 2 and the third wiring 3 are located in the On the same side of the first trace 1, the second trace 2 runs through the first display area, and the third trace 3 runs through the second display area.

FIG. 2 specifically shows the second embodiment of the present invention, wherein the display area AA includes a first display area and a second display area, and the second wiring 2 and the third wiring 3 are located in the On both sides of the first trace 1, the second trace 2 runs through the first display area, and the third trace 3 runs through the second display area.

FIG. 3 specifically shows the third embodiment of the present invention, wherein the second wiring 2 and the third wiring 3 are located on both sides of the first wiring 1 respectively, and the second wiring 2 and the third wiring 3 run through the entire display area AA.

In the present invention, one of the two wirings that are close to each other is set as two different wirings (the second wiring and the third wiring) having signals with the same frequency, the same high and low levels, and a phase difference of 180°. ), due to the 180° phase difference, the coupling effects of the two different traces on the other trace (the first trace) cancel each other out, eliminating the gap between the two traces that were originally close to each other. The picture quality is improved due to the coupling effect caused by the lateral capacitance. The invention has simple process and low cost, and can well eliminate the coupling effect between adjacent wirings.

It should be noted that the above embodiments can be freely combined as required. The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the principles of the present invention, several improvements and modifications can be made. It should be regarded as the protection scope of the present invention.

Claims (10)

1. A display panel comprises a plurality of groups of wires in a display area, and is characterized in that each group of wires comprises a first wire, a second wire and a third wire, the first wire has a signal type different from that of the second wire and the third wire, the second wire and the third wire are arranged adjacent to the first wire, the ratio of the length of the second wire to the distance between the second wire and the first wire is equal to the ratio of the length of the third wire to the distance between the third wire and the first wire, and the second wire and the third wire have different signals with the same frequency, the same high and low levels and the phase difference of 180 degrees.

2. The display panel according to claim 1, wherein the second and third traces are equidistant from the first trace, and the second and third traces are equal in length.

3. The display panel according to claim 1 or 2, wherein the second trace and the third trace are respectively located on the same side of the first trace.

4. The display panel according to claim 3, wherein the display area is divided into a first display area and a second display area, the second wire penetrates through the first display area, and the third wire penetrates through the second display area.

5. The display panel according to claim 1 or 2, wherein the second trace and the third trace are respectively located at two sides of the first trace.

6. The display panel according to claim 5, wherein the display area is divided into a first display area and a second display area, the second wire penetrates through the first display area, and the third wire penetrates through the second display area.

7. The display panel according to claim 5, wherein the second traces and the third traces both extend through the entire display area.

8. The display panel according to claim 1, wherein the second and third traces are parallel to the first trace, respectively.

9. The display panel according to claim 1, wherein the first traces are data lines, and the second traces and the third traces are signal lines.

10. The display panel according to claim 9, wherein the second traces and the third traces are clock signal lines.

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