CN111929954A - display device - Google Patents

Abstract

The invention discloses a display device. The switch array substrate of the display device is provided with a display area and a non-display area, and comprises a signal line, a third conductive layer, a second electrical bridging part and a grid drive circuit. The signal line, the third conductive layer, the second electrical bridging part and the gate drive circuit are positioned in the non-display area. The signal line comprises a first conductive layer, at least one second conductive layer and a plurality of first electrical bridging parts, the first conductive layer and the second conductive layer are arranged in an overlapped mode, and two ends of the second conductive layer are electrically connected with the first conductive layer through the first electrical bridging parts respectively. The first conductive layer is electrically connected with the gate driving circuit through the second electrical bridging part and the third conductive layer. The display device of the invention can effectively reduce the resistance value of the signal wire, thereby improving the problem of overlarge resistance and capacitance load of the signal wire.

Description

display device

technical field

The present invention relates to a display device, in particular, to a display device of an array substrate grid drive integration technology.

Background technique

With the advancement of science and technology, flat-panel display devices have been widely used in various fields, especially liquid crystal display devices, which have gradually replaced traditional cathode ray tube display devices due to their superior characteristics such as thin body, low power consumption and no radiation. , and applied to many types of electronic products, such as mobile phones, portable multimedia devices, notebook computers, LCD TVs and LCD screens, etc.

In the manufacturing technology of flat-panel display devices, the components of the gate drive circuit are fabricated on the switch array substrate by the thin film transistor process, so as to save the cost of the scan driver integrated circuit (IC), which is called the gate on array substrate. , GOA) technology. In the design of the display device of the GOA technology, one of the main problems to be solved by the manufacturer is the problem of signal attenuation caused by excessive RC loading of the signal line.

SUMMARY OF THE INVENTION

In view of the shortcomings of the prior art, the inventors obtained the present invention after research and development. The purpose of the present invention is to provide a display device, which can effectively reduce the resistance value of the signal line, thereby improving the problem that the resistance-capacitance load of the signal line is too large.

The present invention provides a display device including a switch array substrate and a pair of facing substrates. The opposite substrate is arranged opposite to the switch array substrate. The switch array substrate has a display area and a non-display area, and includes a signal line, a third conductive layer, a second electrical bridge portion and a gate drive circuit. The signal line is located in the non-display area. The signal line includes a first conductive layer, at least one second conductive layer and a plurality of first electrical bridges. The first conductive layer and the second conductive layer are overlapped and arranged. The two ends are respectively electrically connected to the first conductive layer through a first electrical bridge portion. The third conductive layer and the second electrical bridge are located in the non-display area. The gate driving circuit is located in the non-display area, and the first conductive layer is electrically connected to the gate driving circuit through the second electrical bridge portion and the third conductive layer.

In one embodiment, when the number of gate driving circuits is two, the two gate driving circuits are respectively located on opposite sides outside the display area.

In one embodiment, the gate driving circuit has a driving element, the switch array substrate further includes a switching element and a scanning line, the switching element is located in the display area, and the driving element is electrically connected to the switching element through the scanning line.

In one embodiment, the signals are respectively transmitted to the driving elements of the gate driving circuit through the signal lines.

In one embodiment, the switch array substrate further includes a first insulating layer and a second insulating layer, the first electrical bridge portion includes a first through hole, a second through hole and a conductive layer, and the first insulating layer cover the first conductive layer, the second conductive layer is arranged on the first insulating layer, the second insulating layer covers the second conductive layer and the first insulating layer, the first through hole is located in the first insulating layer and the second insulating layer, the second The through hole is located in the second insulating layer, and the first conductive layer is electrically connected to the second conductive layer through the first through hole, the conductive layer and the second through hole.

In one embodiment, at least one second conductive layer has two overlapping second conductive layers, and two ends of the two second conductive layers are respectively electrically connected to the first conductive layer.

The present invention further provides a display device including a switch array substrate and a pair of facing substrates. The switch array substrate has a display area and a non-display area, and includes a signal line, a third conductive layer and a second electrical bridge, a gate driving circuit, a first insulating layer and a second insulating layer . The signal line is located in the non-display area. The signal line includes a first conductive layer, at least one second conductive layer and a plurality of first electrical bridges. The first conductive layer and the second conductive layer are overlapped and arranged. The two ends are respectively electrically connected to the first conductive layer through a first electrical bridge portion. The third conductive layer and the second electrical bridge are located in the non-display area. The gate driving circuit is located in the non-display area, and the gate driving circuit has a driving element. The first conductive layer is electrically connected to the driving element through the second electrical bridge portion and the third conductive layer. The first insulating layer covers the first conductive layer, and the second conductive layer is disposed on the first insulating layer. The second insulating layer covers the second conductive layer and the first insulating layer, wherein the first electrical bridge portion includes a first through hole, a second through hole and a conductive layer, and the first through hole is located between the first insulating layer and the first insulating layer. Two insulating layers, the second through hole is located in the second insulating layer, and the first conductive layer is electrically connected to the second conductive layer through the first through hole, the conductive layer and the second through hole. The opposite substrate is arranged opposite to the switch array substrate.

Based on the above, in the display device of the present invention, at least one second conductive layer is disposed above the first conductive layer for transmitting signals, and the first conductive layer and the second conductive layer are connected through two first electrical bridges. The structural design of the two conductive layers being electrically connected and overlapping enables the signal line used for signal transmission in the display device to effectively reduce its resistance value, thereby improving the problem that the resistance and capacitance load of the signal line is too large.

Description of drawings

The accompanying drawings, which are included to provide a further understanding of the embodiments of the present application, constitute a part of the specification, are used to illustrate the embodiments of the present application, and together with the written description, serve to explain the principles of the present application. Obviously, the drawings in the following description are only some embodiments of the present application, and for those of ordinary skill in the art, other drawings can also be obtained from these drawings without creative effort. In the attached image:

FIG. 1 and FIG. 2 are different schematic diagrams of a display device according to a preferred embodiment of the present invention, respectively.

FIG. 3 is a partial circuit schematic diagram of the switch array substrate of FIG. 2 .

FIG. 4 is a schematic top view of a signal line corresponding to a region of FIG. 3 .

FIG. 5 is a schematic cross-sectional view taken along line A-A in FIG. 4 .

FIG. 6 is a schematic diagram of steps of a method for reducing the resistance-capacitance load of a signal line of a display device according to the present invention.

Detailed ways

Specific structural and functional details disclosed herein are merely representative and for purposes of describing example embodiments of the present application. The application may, however, be embodied in many alternative forms and should not be construed as limited only to the embodiments set forth herein.

In the description of this application, it should be understood that the terms "center", "lateral", "top", "bottom", "left", "right", "vertical", "horizontal", "top", The orientation or positional relationship indicated by "bottom", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings, which is only for the convenience of describing the present application and simplifying the description, rather than indicating or implying the indicated device. Or elements must have a particular orientation, be constructed and operate in a particular orientation, and therefore should not be construed as a limitation of the present application. In addition, the terms "first" and "second" are only used for descriptive purposes, and should not be construed as indicating or implying relative importance or implying the number of indicated technical features. Thus, a feature defined as "first" or "second" may expressly or implicitly include one or more of that feature. In the description of this application, unless stated otherwise, "plurality" means two or more. Additionally, the term "comprising" and any variations thereof are intended to cover non-exclusive inclusion.

In the description of this application, it should be noted that, unless otherwise expressly specified and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense, for example, it may be a fixed connection or a detachable connection Connection, or integral connection; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be internal communication between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood in specific situations.

The terminology used herein is for the purpose of describing specific embodiments only and is not intended to limit the exemplary embodiments. As used herein, the singular forms "a", "an" and "an" are intended to include the plural unless the context clearly dictates otherwise. It should also be understood that the terms "comprising" and/or "comprising" as used herein specify the presence of stated features, integers, steps, operations, units and/or components, but do not preclude the presence or addition of one or more Other features, integers, steps, operations, units, components and/or combinations thereof.

The display device and the method for reducing the resistance-capacitance load of the signal line according to the preferred embodiment of the present invention will be described below with reference to the related drawings, wherein the same elements will be described with the same reference symbols.

FIG. 1 and FIG. 2 are different schematic diagrams of a display device according to a preferred embodiment of the present invention, respectively.

As shown in FIG. 1 , the display device 1 includes a switch array substrate 11 and a pair of opposite substrates 12 . The switch array substrate 11 and the opposite substrate 12 are disposed opposite to each other and can be used to display images. The display device 1 is a flat display device, such as a liquid crystal display device (LCD) or an organic light emitting diode display device (OLED). The display device 1 of the present embodiment is an example of a liquid crystal display device. Therefore, a liquid crystal layer 13 can be sandwiched between the switch array substrate 11 and the opposite substrate 12 . In addition, the switch array substrate 11 of this embodiment is a display substrate, and the opposite substrate 12 is a color filter substrate as an example. However, in other embodiments, the black matrix layer or the filter layer on the color filter substrate can also be disposed on the switch array substrate 11 , so that the switch array substrate 11 becomes a BOA (BM on array) substrate , or become a COA (color filter on array) substrate, which is not limited in the present invention.

As shown in FIG. 2 , the switch array substrate 11 has a display area (Active Area) AA and a non-display area NAA. The display area AA is an area on the switch array substrate 11 that can be used to display images, and light can pass through the display area AA And reach the person watching the screen. On the other hand, the non-display area NAA is an area on the switch array substrate 11 where the image screen cannot be displayed. The display device 1 of the present embodiment is a display device with integrated gate driving of an array substrate. Therefore, in addition to an array formed by switching elements, the switch array substrate 11 can also include at least one gate driving circuit. The circuit is located in the non-display area NAA, so it will not block the penetration of light.

Please refer to FIG. 2 and FIG. 3 , wherein FIG. 3 is a partial circuit diagram of the switch array substrate 11 of FIG. 2 .

The switch array substrate 11 may include a plurality of switching elements T (only one switching element T is shown in FIG. 3 ), a plurality of scanning lines (only two scanning lines Gn and Gn+1 are shown in FIG. 3 ), and at least one gate driving circuit ( FIG. 3 ). Only one gate drive circuit 141a) is shown. The plurality of switching elements T can be thin film transistors (TFTs), respectively, located in the display area AA of the switching array substrate 11 , and can be arranged in an array. In addition, the present embodiment takes two gate driving circuits 141a and 141b as an example. The gate driving circuits 141a and 141b are fabricated on the switch array substrate 11 by the thin film transistor process, so they can be called GOA (Gate on Array) circuits. In this way, the cost of the integrated circuit (IC) of the gate driving circuit can be saved. Further, the cost of the display device 1 is reduced.

The gate driving circuits 141a and 141b respectively have a plurality of driving elements 1411. The driving elements 1411 are, for example, shift registers, and the plurality of driving elements 1411 can be respectively connected to as many as located in the display area AA through a plurality of scanning lines. The gates of the switching elements T are electrically connected, and when the scanning lines respectively receive the scanning signals output by the driving elements 1411 of the gate driving circuits 141a and 141b, the switching elements T can be turned on in sequence. In this embodiment, the two gate driving circuits 141a and 141b are located in the non-display area NAA, and are respectively located on opposite sides outside the display area AA, so that the display device 1 can be a display capable of bilateral driving.

In addition, the display device 1 may further include a timing control circuit and a source driving circuit (not shown in the figure), and the source driving circuit may be respectively connected with the plurality of switch array substrates 11 through a plurality of data lines (not shown). The pixel electrodes (not shown) of each pixel are electrically connected. The timing control circuit is electrically connected to the source driving circuit and the gate driving circuit 141a and 141b, respectively. The timing control circuit can transmit the vertical clock (CLK) signal and the vertical synchronization signal to the gate driving circuits 141a and 141b, convert the video signal received from the external interface into the data signal used by the source driving circuit, and transmit the data signal , the horizontal clock signal and the horizontal synchronization signal to the source drive circuit. In addition, the gate driving circuits 141a and 141b can sequentially turn on the scan lines through the driving element 1411 according to the vertical clock signal and the vertical synchronization signal. When the scan line is turned on, the source driving circuit can transmit the data signal corresponding to each row of pixels to the pixel electrode of each pixel through the data line, so that the display device 1 can display images.

Since the gate driving circuits 141a and 141b need to receive the signals (such as the vertical clock signal and the vertical synchronization signal) transmitted by the timing control circuit, the switch array substrate 11 of the present embodiment needs to have more components besides the above-mentioned components. A signal line is provided for signal transmission. Therefore, the switch array substrate 11 may further include at least one signal line SL, for example, the signal line SL may be used to transmit a vertical clock signal or a vertical synchronization signal, or transmit other electrical signals to the gate driving circuits 141a and 141b.

In the embodiment of FIG. 3 , the non-display area NAA of the switch array substrate 11 is illustrated with four signal lines SL as an example to transmit signals S1 - S4 to the driving elements 1411 of the gate driving circuit 141 a respectively, and then Not limited to this, in different embodiments, different numbers of signal lines SL can be set according to actual design requirements, and the connection between these signal lines SL and the driving element 1411 of the gate driving circuit 141a can also be determined according to different designs. are different and are not limited here.

Please refer to FIG. 3 in conjunction with FIG. 4 and FIG. 5 , wherein FIG. 4 is a schematic top view of the signal line SL corresponding to area B in FIG. 3 , and FIG. 5 is a schematic cross-sectional view along line A-A in FIG. 4 . FIG. 5 still shows the liquid crystal layer 13 and the opposite substrate 12 of the display device 1 .

As shown in FIGS. 3 to 5 , taking the signal line SL for transmitting the signal S4 as an example, the signal line SL may include a first conductive layer 111 , at least one second conductive layer 112 and a plurality of first electrical bridges B1 , The switch array substrate 11 may further include a third conductive layer 113 and a second electrical bridge portion B2. In addition, the switch array substrate 11 of this embodiment may further include a first insulating layer 115 , a second insulating layer 116 and a transparent substrate 117 . Among them, the first conductive layer 111, the second conductive layer 112 of the signal line SL and the plurality of first electrical bridge parts B1, the third conductive layer 113, the second electrical bridge part B2, the first insulating layer 115, the second electrical bridge part B2 Both the insulating layer 116 and the gate driving circuit 141a are located in the non-display area NAA.

The first conductive layer 111 of the signal line SL can be electrically connected to the driving element 1411 through the second electrical bridge portion B2 and the third conductive layer 113. Therefore, the signals S1 to S4 can pass through the corresponding first conductive layer 111, the third conductive layer 113 and the corresponding first conductive layer 111, respectively. The two electrical bridge portion B2 and the third conductive layer 113 are electrically connected to the corresponding driving element 1411 of the gate driving circuit 141a, so that the driving element 1411 can output a scan signal and conduct each pixel located in the display area AA through the corresponding scanning line. the switching element T.

In addition, the first conductive layer 111 is disposed on the transparent substrate 117 , the first insulating layer 115 covers the first conductive layer 111 , the second conductive layer 112 is disposed on the first insulating layer 115 , and the second insulating layer 116 covers the second conductive layer 112 and the first insulating layer 115 , so that the first insulating layer 115 is sandwiched between the first conductive layer 111 and the second conductive layer 112 . Two ends of the second conductive layer 112 are respectively electrically connected to the first conductive layer 111 through a first electrical bridge portion B1 , so that the first conductive layer 111 and the second conductive layer 112 are overlapped.

The first electrical bridge portion B1 in this embodiment may include a first through hole H1 , a second through hole H2 and a conductive layer C. The first through hole H1 is located in the first insulating layer 115 and the second insulating layer 116 , and the second through hole H2 is located in the second insulating layer 116 , and the conductive layer C is disposed on the second insulating layer 116 and filled in the first through hole H2 . The holes H1 and the second through holes H2 are respectively in contact with the first conductive layer 111 and the second conductive layer 112 for electrical connection, so that the first conductive layer 111 can pass through the first through hole H1, the second through hole H2 and the conductive layer. C is electrically connected to the second conductive layer.

Specifically, in the display device 1 of the present embodiment, another conductive layer: the second conductive layer 112 is respectively provided on the first conductive layer 111 of the signal lines SL for transmitting the signals S1 to S4, and the second conductive layer 112 is arranged on the second conductive layer 112. Two ends of the conductive layer 112 are respectively provided with a first electrical bridge portion B1, so that the second conductive layer 112 and the first conductive layer 111 are overlapped and electrically connected through the two first electrical bridge portions B1. By arranging another conductive layer (the second conductive layer 112 ) above the signal lines SL (the first conductive layer 111 ) for transmitting the signals S1 - S4 , and through the two first electrical bridge parts B1 to make the two conductive layers The structural design of the electrically connected and overlapping arrangement enables the signal line SL for transmitting the signal of the display device 1 to effectively reduce its resistance value, thereby improving the problem that the resistance and capacitance load of the signal line SL is too large.

It is worth noting that, in this embodiment, a second conductive layer 112 and the first conductive layer 111 are overlapped as an example, but it is not limited to this. In different embodiments, the number of the second conductive layers 112 There may be two or more (not shown), two or more of the second conductive layers 112 may overlap the first conductive layer 111 respectively, and both ends of the two second conductive layers 112 are also It can be electrically connected to the first conductive layer 111 through the corresponding first electrical bridge portions B1 respectively, which is not limited in the present invention.

The material of the first conductive layer 111 , the second conductive layer 112 or the third conductive layer 113 can be a single-layer or multi-layer structure composed of metal (for example, aluminum, copper, silver, molybdenum, or titanium) or its alloy; or , the first conductive layer 111 , the second conductive layer 112 or the third conductive layer 113 can also be made of transparent conductive materials, such as indium tin oxide (ITO), indium zinc oxide (IZO), aluminum zinc oxide It is not limited to transparent conductive materials such as aluminum oxide (AZO), cadmium tin oxide (CTO), tin oxide (SnO2), or zinc oxide (ZnO). In addition, the first insulating layer 115 or the second insulating layer 116 may be an organic material such as organic silicon oxide compound, or an inorganic material such as silicon nitride, silicon oxide, silicon oxynitride, silicon carbide, aluminum oxide, hafnium oxide, or The multilayer structure of the above-mentioned materials is not limited. In addition, the conductive layer C can be made of the same material and process as the first conductive layer 111 , the second conductive layer 112 or the third conductive layer 113 , or the conductive layer C can also be made of a transparent conductive material, such as It is made by using the same material and process as the pixel electrode, which is not limited by the present invention.

FIG. 6 is a schematic diagram of steps of a method for reducing the resistance-capacitance load of a signal line of a display device according to the present invention. Here, the above-mentioned display device 1 is taken as an example, and the specific technical content and means of the display device 1 have been described in detail above, and will not be further described. As shown in FIG. 6 , the method for reducing the resistance-capacitance load of a signal line of a display device includes step S01 : both ends of the second conductive layer 112 are electrically connected to the first conductive layer 111 through a first electrical bridge portion B1 respectively, so that the second conductive layer 112 is electrically connected to A conductive layer 111 and the second conductive layer 112 are overlapped. Other technical means for reducing the resistance-capacitance load of the signal line are also described in detail above, and will not be repeated here.

To sum up, in the display device of the present invention, at least one second conductive layer is disposed above the first conductive layer for transmitting signals, and the first conductive layer and the second conductive layer are connected through two first electrical bridges. The structural design of the two conductive layers being electrically connected and overlapping enables the signal line used for signal transmission in the display device to effectively reduce its resistance value, thereby improving the problem that the resistance and capacitance load of the signal line is too large.

The above description is exemplary only, not limiting. Any equivalent modifications or changes without departing from the spirit and scope of the present invention should be included in the scope of the claims.

Claims (10)

1. A display device, characterized in that, comprising: A switch array substrate has a display area and a non-display area, and includes: a signal line, located in the non-display area, the signal line includes a first conductive layer, at least one second conductive layer and a plurality of first electrical bridges, the first conductive layer and the second conductive layer The layers are overlapped, and both ends of the second conductive layer are electrically connected to the first conductive layer through one of the first electrical bridges respectively; a third conductive layer and a second electrical bridge, located in the non-display area; and a gate driving circuit, located in the non-display area, the first conductive layer is electrically connected to the gate driving circuit through the second electrical bridge portion and the third conductive layer; and A pair of facing substrates are arranged opposite to the switch array substrate. 2 . The display device of claim 1 , wherein when the number of the gate driving circuits is two, the two gate driving circuits are respectively located on opposite sides outside the display area. 3 . 3. The display device of claim 1, wherein the gate driving circuit has a driving element, and the switch array substrate further comprises: a switch element located in the display area; and A scan line, the driving element is electrically connected to the switching element through the scan line. 4 . The display device according to claim 3 , wherein the driving elements of the gate driving circuit respectively transmit signals through the signal lines. 5 . 5. The display device of claim 1, wherein the switch array substrate further comprises: a first insulating layer, the first insulating layer covers the first conductive layer, and the second conductive layer is disposed on the first insulating layer. 6. The display device of claim 5, wherein the switch array substrate further comprises: A second insulating layer covers the second conductive layer and the first insulating layer. 7 . The display device of claim 1 , wherein the first electrical bridge portion comprises a first through hole, a second through hole and a conductive layer, and the first through hole is located in the the first insulating layer and the second insulating layer, the second through hole is located in the second insulating layer, the first conductive layer passes through the first through hole, the conductive layer and the second through hole The hole is electrically connected to the second conductive layer. 8 . The display device of claim 1 , wherein the at least one second conductive layer has two of the second conductive layers, and two ends of the two second conductive layers are respectively connected to the second conductive layer. 9 . A conductive layer is electrically connected. 9 . The display device of claim 1 , wherein the display device is a liquid crystal display device or an organic light emitting diode display device. 10 . 10. A display device, comprising: A switch array substrate has a display area and a non-display area, and includes: a signal line, located in the non-display area, the signal line includes a first conductive layer, at least one second conductive layer and a plurality of first electrical bridges, the first conductive layer and the second conductive layer The layers are overlapped, and both ends of the second conductive layer are electrically connected to the first conductive layer through one of the first electrical bridges respectively; a third conductive layer and a second electrical bridge, located in the non-display area; a gate driving circuit located in the non-display area, the gate driving circuit has a driving element, the first conductive layer is connected to the driving element through the second electrical bridge portion, the third conductive layer Component electrical connection; a first insulating layer covering the first conductive layer, the second conductive layer disposed on the first insulating layer; and A second insulating layer covering the second conductive layer and the first insulating layer, wherein the first electrical bridge portion includes a first through hole, a second through hole and a conductive layer, the first electrical bridge portion includes a first through hole, a second through hole and a conductive layer. A through hole is located in the first insulating layer and the second insulating layer, the second through hole is located in the second insulating layer, and the first conductive layer passes through the first through hole and the conductive layer. and the second through hole is electrically connected to the second conductive layer; and A pair of facing substrates are arranged opposite to the switch array substrate.

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