Liquid crystal panel

Provided is a liquid crystal panel. The liquid crystal panel includes a glass substrate, a black matrix and a common electrode which are sequentially stacked. The common electrode completely covers the black matrix. The black matrix comprises a plurality of rows of first shading lines and a plurality of rows of second shading lines. The first shading lines and the second shading lines are perpendicular to and intersect with each other. The glass substrate is further provided with a first signal source located on one side of the black matrix and a plurality of rows of first metal lines disposed on one side facing away from the glass substrate to connect the first signal source and the first metal lines of the common electrode. The first metal lines covering the first shading lines replace common lines located outside the display area of the array substrate.

CROSS REFERENCE

This application is a National Phase of International Application Number PCT/CN2018/105782, filed Sep. 14, 2018, and claims the priority of Chinese Patent Application No. 201810788169.6, entitled “Liquid crystal panel”, filed on Jul. 18, 2018, the disclosure of which is incorporated herein by reference in its entirety.

FIELD OF THE INVENTION

The present invention relates to a liquid crystal display device field, and more particularly to a liquid crystal panel of narrow frame.

BACKGROUND OF THE INVENTION

In the current environment of the liquid crystal display industry generally pursuing a narrow frame and a large screen occupation ratio, reducing the frame size of the liquid crystal panel is an important research direction. Although the industry has already controlled the frame size of the array substrate by means of Gate Driver on Array (GOA) driving technology, etc., since the common line area remains around the frame of array substrate, further reduction of the frame of array substrate is limited.

The common line is connected with an external signal source (such as a PCB board, etc.) on the liquid crystal panel and a common electrode for providing a reference potential to the common electrode on the liquid crystal panel. Thus, the current trace of the common line of the liquid crystal display still needs to surround the position around the display area of the array substrate and occupies a large amount of space, thus further reduction of the width of the frame of the liquid crystal panel is limited.

SUMMARY OF THE INVENTION

The present application proposes a circuit optimized liquid crystal panel, which can provide a reliable reference potential for a common electrode while eliminating use of a large number of common lines. The present application includes the following technical solutions:

a liquid crystal panel, comprising a color filter substrate, wherein the color filter substrate comprises a glass substrate, a black matrix and a common electrode which are sequentially stacked, and the common electrode completely covers the black matrix, and the black matrix comprises a plurality of rows of first shading lines extending in a first direction and a plurality of rows of second shading lines extending in a second direction, and the first shading lines and the second shading lines are perpendicular to and intersect with each other, and the glass substrate is further provided with a first signal source located on one side of the black matrix in the first direction, and a plurality of rows of first metal lines are disposed on one side of the black matrix facing away from the glass substrate, and each row of first metal lines at least covers a portion of a row of the first shading line in the first direction, and the plurality of rows of the first metal lines are used to connect the first signal source and the common electrode.

The plurality of rows of the first shading lines and the plurality of rows of the second shading lines enclose a plurality of sub-pixel regions, and the liquid crystal panel further comprises color filters, and the color filters are located in the sub-pixel regions, and each of the color filters completely covers the corresponding sub-pixel region, and the color filters are located between the common electrode and the glass substrate.

A surface of the glass substrate facing the common electrode is a first plane, and in a stacking direction of the common electrode and the glass substrate, a maximum distance of the color filter from the first plane is greater than a maximum distance of the first metal line from the first plane.

In the second direction, a projection of the first metal line on the first shading line is received in the first shading line or aligned with the first shading line.

A number of the first metal lines is equal to a number of the first shading lines, and each row of the first metal lines correspondingly covers a row of the first shading lines.

The first metal line completely covers the first shading line in the first direction.

The liquid crystal panel further comprises an array substrate, wherein the array substrate is provided with a fan-out area on one side in a periphery of a display area facing the first signal source in the first direction, and a projection of the first signal source in the fan-out area is received in the fan-out area.

The black matrix is provided with a second signal source on one side of the first direction away from the first signal source, and a plurality of rows of second metal lines are disposed on one side of the black matrix facing away from the glass substrate, and each row of second metal lines at least covers a portion of a row of the first shading line in the first direction, and the first metal lines and the second metal lines are alternately arranged along the second direction, and the second metal lines are used to connect the second signal source and the common electrode.

The array substrate is also provided with a fan-out area on one side in a periphery of a display area facing the second signal source in the first direction, and a projection of the second signal source in the fan-out area is received in the fan-out area.

A sum of a number of the second metal lines and a number of the first metal lines is equal to a number of the first shading lines.

The liquid crystal panel further comprises a plurality of rows of third metal lines extending along the second direction, wherein each row of the third metal lines at least covers a portion of a row of the second shading line, and each row of the second metal line is at least electrically connected to two rows of the first metal lines, simultaneously.

The glass substrate is further provided with a third signal source located on one side of the black matrix in the second direction, and the plurality of rows of the third metal lines are used to connect the third signal source and the common electrode.

A projection of the third metal line on the second shading line is received in the second shading line or aligned with the second shading line.

A number of the third metal lines is equal to a number of the second shading lines, and each row of the third metal lines correspondingly covers a row of the second shading lines.

The third metal line completely covers the second shading line in the second direction.

In the liquid crystal panel according to the present application, the liquid crystal panel is shaded from light and the potential reference is provided by the color filter substrate in which the glass substrate, the black matrix and the common electrode are sequentially stacked. The potential reference of the common electrode is provided by the first signal source, and conduction of the potential reference is achieved by connecting the common electrode and the first metal line of the first signal source. The first metal line at least covers a portion of a row of the first shading line in the first direction. Namely, the trace of the first metal line is arranged along a path of the first shading line. Since the first metal line connects the first signal source and the common electrode simultaneously, the first metal line may replace a common line previously located around the array substrate of the liquid crystal panel to connect the common electrode and the first signal source to achieve potential balance. Specifically, the first metal lines replace the common line wiring on three sides outside the display area of the array substrate, and the potential reference balance of the common electrode is realized by an electrical connection between the first signal source and the common electrode. After eliminating the common lines on the three sides, the frame width of the array substrate at these three sides can be further reduced to achieve the effect of narrowing frames. It can be understood that the liquid crystal display obtains a prominent narrow frame effect due to being equipped with the liquid crystal panel described in the present application. Furthermore, electronic device equipped with the liquid crystal display also promotes the user experience due to the narrow frame effect.

DETAILED DESCRIPTION OF PREFERRED EMBODIMENTS

The embodiments of the present application are described in detail with the technical matters, structural features, achieved objects, and effects with reference to the accompanying drawings as follows. It is clear that the described embodiments are part of embodiments of the present application, but not all embodiments. Based on the embodiments of the present application, all other embodiments to those of ordinary skill in the premise of no creative efforts obtained, should all be considered within the scope of protection of the present application.

Please refer toFIG. 1,FIG. 2andFIG. 5. The liquid crystal panel200includes a color filter substrate100. The color filter substrate100includes a glass substrate10, a black matrix20and a common electrode30. The glass substrate10and the black matrix20and the common electrode30are sequentially stacked in a direction perpendicular to the glass substrate10. The black matrix20is located between the glass substrate10and the common electrode30. The common electrode30serves as a component for providing a reference potential to the outside of the color filter substrate100, and completely covers the black matrix20. The black matrix20includes a plurality of rows of first shading lines21extending in a first direction001and a plurality of rows of second shading lines22extending in a second direction002. Specifically, each row of the first shading lines21is perpendicular to and intersect with the plurality of rows of the second shading lines22. Each row of the second shading lines22is perpendicular to and intersect with the plurality of rows of the first shading lines21. The glass substrate100is further provided with a first signal source40located on one side of the black matrix20in the first direction001. The first signal source40extends a plurality of rows of first metal lines50to the black matrix20. The first metal lines50are disposed on one side of the black matrix20facing away from the glass substrate10, and at least cover portions of the first shading lines21in the first direction001. Specifically, each row of the first metal lines50independently corresponds to a row of the first shading lines21, and the first metal line50cover at least a portion of a length of the corresponding first shading line21direction001.

It can be understood that since the common electrode30is made of a conductive material, the first metal line50is also made of a conductive material. Besides, the common electrode30and the first metal line50are both located on one side of the black matrix20facing away from the glass substrate10, and the common electrode30and the plurality of rows of the first metal lines50are all electrically connected. Thereby, the first metal line50can simultaneously connect the first signal source40and the common electrode30. The first signal source40provides a reference potential to the color filter substrate100when the liquid crystal panel200is in operation. The reference potential is conducted to the common electrode30through the first metal line50. Since the first metal lines50are arranged in multiple rows, a relatively complete coverage to the common electrode30can be achieved. Therefore, the first metal lines50can replace the common lines in the existing design, thereby realizing the function of providing the potential reference to the common electrode30. Furthermore, since the first metal line50is located within the black matrix20and the black matrix20is located within the display area of the liquid crystal panel200, the first metal line50does not occupy the non-display area of the liquid crystal panel200as the common lines described above, and thus the non-display area of the liquid crystal panel200can be reduced. Specifically, the display area of the liquid crystal panel200has a rectangular shape. The first signal source40is disposed on one side of the display area of the liquid crystal panel200in the first direction001. The common lines in the prior art are usually located on the array substrate300of the liquid crystal panel200, and the first signal source40is also generally located on the array substrate300, thereby widening the area of the array substrate300. In the liquid crystal panel200of the present application, the common lines originally disposed on the array substrate300are replaced by the first signal source40and the first metal lines50disposed on the color filter substrate100. Therefore, the arrangement of the common lines on the array substrate300is eliminated, thereby reducing the frame width and obtaining a better narrow frame effect.

It can be understood that for the position relationship between the first metal line50and the common electrode30, in the embodiment ofFIG. 2, the first metal line50is located between the black matrix20and the common electrode30. When the common electrode30provides the reference potential to the outside, the common electrode30also serves as an outermost surface of the color filter substrate100, and provides the reference potential to the outside. In other embodiments, the first metal lines50may also be disposed on one side of the common electrode30facing away from the glass substrate10. Namely, the first metal lines50and the common electrode30together form the outermost surface of the color filter substrate100, and provide the reference potential to the outside. Because of the operational properties of the common electrode30, it is only necessary to ensure that the reference potential supplied to the outside is accurately uniform, and the outer surface thereof does not need to be in contact with the outside. Therefore, the first metal lines50, which are also made of a conductive material and possess the same potential, can also provide the reference potential to the outside together with the common electrode30without affecting the normal operation of the liquid crystal panel200. Specifically, the position relationship between the first metal lines50and the common electrode30can be flexibly set by specific process conditions.

Specifically, in order to facilitate a clearer description, the first shading lines21and the second shading lines22in the black matrix20are enlarged in each figure of the present application, and the corresponding first metal lines50are also enlarged with the same ratio. In the actual product, the actual density of the first shading lines21and the second shading lines22in the black matrix20of the liquid crystal panel200is much smaller than the illustration, and the line widths of the first shading lines21and the second shading lines22are also far smaller than the illustration.

On the other hand, when the first metal lines50that the first signal source40needs to drive are excessive, in order to reduce the loading, a plurality of the first signal sources40may be disposed on the same side of the black matrix20, and the plurality of the first signal sources40are electrically connected to the common electrode30through the first metal lines50, and the plurality of the first signal sources40provide the potential reference to the common electrode30.

Please refer toFIG. 1, the plurality of rows of the first shading lines21and the plurality of rows of the second shading lines22enclose a plurality of sub-pixel regions23on the color filter substrate100. It can be understood that after the cell process is accomplished with the color filter substrate100, the sub-pixel regions23are configured to transmit colored light while the black matrix20is configured to block light passing through the outside of the sub-pixel regions23. In the COA-based panel, since the color filter is disposed on the array substrate, the sub-pixel regions23are only used to transmit the light.

In the embodiment ofFIG. 3, the color filters60are disposed on the color filter substrate100. Then, the color filters60are disposed in the sub-pixel regions23. Each of the color filters60completely covers the corresponding sub-pixel region23. Alternatively, the color filters60are separately disposed on the liquid crystal panel100. The black matrix20is filled in spaces among the color filters60, and the black matrix20is configured to block light, and the light between two adjacent color filters60is prevented from passing through the color filter substrate100. Please refer toFIG. 4. The color filters60are located between the common electrode30and the glass substrate10. It can be understood that the color filters60may include a “red, green, blue” three-color filters arranged in sequence, or some other color filters such as “red, green, blue, white” arranged in sequence.

Furthermore, a direction in which the glass substrate10faces the common electrode30is defined as a third direction003. In the third direction003, a surface of the glass substrate10close to the common electrode30is a first plane11. A height of the color filter60in the third direction003needs to be greater than a height of the first metal line50in the third direction003. Namely, the most distal dimension of the color filter60from the first plane11is greater than the most distal dimension of the first metal line50from the first plane11. Thus, this ensures that the color filters60are closer to the external device relative to the first metal lines50. Due to the insulating properties, the color filter60is uncharged itself. The color filter can provide a certain protection to the first metal lines50when an accidental contact occurs between the color filter substrate100and an external device (such as the array substrate300). When the color filter60is scratched or indented by the outside, the first metal line50can continue to maintain the shape without being damaged, and the electrical function can be maintained to be normal. At the expense of the partial filtering effect, the electrical balance of the entire color filter substrate100can be still maintained.

In one embodiment, for the size of the first metal line50in the second direction002, a projection of the first metal line50on the first shading line21is received in the first shading line21or aligned with the first shading line21, Namely, the first metal line50does not exceed a size range of the first shading line21in the second direction002. Thus, the light-passing area of the sub-pixel region23is the area enclosed by the first shading line21and the second shading line22, so as to avoid that the first metal line50is beyond the first shading line21, and shades the light that should pass through the sub-pixel region23to lower the overall amount of the light passing through the liquid crystal panel100to decrease the overall brightness.

It can be understood that the arrangement of the first metal lines50in the second direction002has no influence on whether the color filters60are located on the liquid crystal panel100or not. Namely, this embodiment can be applied to both the color filter substrate100including the color filter60and the color filter substrate100in which the color filter60is not configured according to the COA technology.

Specifically, as shown inFIG. 1andFIG. 3, a number of the first metal lines50can be equal to a number of the first shading lines21(inFIG. 1), and can be less than the number of the first shading lines21. When the number of the first metal lines50is less than the number of the first shading lines21, the first metal lines50are preferably distributed evenly on the first shading lines21along the second direction002(inFIG. 3). Certainly, in other embodiments, when the number of the first metal lines50is less than the number of the first shading lines21, the first metal lines50may not be evenly distributed on the first shading lines21. It can be understood that when the number of the first metal lines50is equal to the number of the first shading lines21, i.e. each row of the first metal lines50correspondingly covers a row of the first shading lines21. The first metal line50can be in more fully contact with the common electrode30to achieve a better balance potential effect.

In one embodiment, the first metal line50completely covers the first shading line21in the first direction001. Namely, the first metal line50completely penetrates the black matrix20along the first direction001. After such arrangement, the common electrode30covering on the black matrix20can be connected with the first metal lines40in the first direction001to better achieve the control of the potential reference of the common electrode30by the first metal line50.

As shown in the embodiment ofFIG. 5, the color filter substrate100and the array substrate300are stacked in the third direction003. The array substrate300is provided with a fan-out area310on one side in a periphery of a display area301facing the first signal source40in the first direction001. The fan-out area310is used to provide scan signals and data signals for the array substrate300. A projection of the first signal source40in the fan-out area310is received in the fan-out area310. Because of the presence of the fan-out area310, the area of the array substrate300is larger than the area of the color filter substrate100. By configuring the projection of the first signal source40to be received in the fan-out area310, a defect that a total area of the liquid crystal panel200is increased because an occupied area of the first signal source40is excessively large can be avoided.

As aforementioned, when the first metal lines50that the first signal source40needs to drive are excessive, in order to reduce the loading, a plurality of the first signal sources40may be disposed on the same side of the black matrix20, Please refer to another embodiment ofFIG. 6, the black matrix20is provided with a second signal source41on one side away from the first signal source40in the first direction001. A plurality of rows of second metal lines51is disposed on one side of the black matrix20facing away from the glass substrate10. Each row of second metal lines51at least covers a portion of a row of the first shading line21in the first direction001, and the first metal lines50and the second metal lines51are alternately arranged along the second direction002, and the second metal lines51are used to connect the second signal source41and the common electrode30. Such arrangement can also reduce the driving stress of the single first signal source40, so that the potential balance of the entire common electrode30can be further ensured.

It can be understood that the shape and thickness of the second metal lines51are preferably similar to the arrangement of the first metal lines50. Namely, the width of the second metal line51in the second direction002does not exceed the first shading line21, and a distance of the second metal line51in the third direction003from the first plane11is preferably smaller than a distance of the color filter60from the first plane11. Meanwhile, for covering the common electrode30as possible, a sum of the number of the second metal lines51and the number of the first metal lines50is preferably equal to the number of the first shading lines21. Furthermore, in case that the array substrate300is also provided with a fan-out area310on one side of the display area301adjacent to the second signal source41, a projection of the second signal source41on the array substrate300is also preferably received in the fan-out area310.

Please refer to embodiment ofFIG. 7, the color filter substrate100further includes a plurality of rows of third metal lines52. The plurality of rows of third metal lines52extend along the second direction002, and each row of the third metal lines52at least covers a portion of a row of the second shading line22in the second direction002. Furthermore, each row of the second metal line52is at least electrically connected to two rows of the first metal lines50, simultaneously. Alternatively, each row of the third metal lines52conducts a row of the first metal lines50and a row of the second metal lines51. As shown in the embodiment ofFIG. 7, the plurality of rows of first metal lines50extend independently from one another in the first direction001to perform potential balance function on the common electrode30adjacent to the connection region after being connected with the common electrode30. Since the respective rows of first metal lines50are different in process, material and stroke distance, there may be slight differences in current transmitting rate. Therefore, at the position in the first direction001away from the first signal source40, a large potential difference may be formed between the rows of the first metal lines50, and eventually, the potential reference on one side of the color film substrate100away from the first signal source40possesses a relatively more nonuniform phenomenon. After the third metal lines52are introduced, the third metal lines52may connect the plurality of rows of first metal lines50in series in the second direction002. Each row of the first metal lines50can be electrically balanced under the series connection of the third metal lines52. The neutralization due to nonuniform potential due to the different current transmitting rates is achieved. Namely, the third metal lines52can balance the potential difference among the first metal lines50, which contributes to a more accurate potential reference of the common electrode30. Certainly, in the embodiment in which the color film substrate100is further provided with the second metal lines51, the third metal lines52may also balance the potential difference between the first metal lines50and the second metal lines51.

It can be understood that the third metal line52is preferably disposed to across the first metal line50as possible. Similar to the embodiment ofFIG. 7, the third metal lines52completely cover each row of the first metal lines50in the second direction002. Furthermore, similar to the arrangement of the first metal lines50, the size of the third metal line52in the first direction001is received in the second shading line22or aligned with the second shading line22; a distance of the third metal line52in the third direction003from the first plane11is preferably smaller than a distance of the color filter60from the first plane11; a number of the third metal lines52is preferably equal to a number of the second shading lines22, and the effect thereof is also similar to the effect of the first metal lines50.

Furthermore, as shown inFIG. 8, the color filter substrate100is provided with a third signal source42on one side of the black matrix20in the second direction002. Thereby, the plurality of rows of third metal lines52are used to connect the third signal source42and the common electrode30. The cooperation of the third signal source42with the first signal source40, or the cooperation of the third signal source42with the second signal source41and the first signal source40can further ensure the potential balance on the common electrode30. Furthermore, in case that the array substrate300is also provided with a fan-out area310on one side of the display area301adjacent to the third signal source42, a projection of the third signal source42on the array substrate300is also preferably received in the fan-out area310.

It can be understood that when the liquid crystal panel200of the present application is equipped in the liquid crystal display, the frame of the liquid crystal display can be further narrowed, the effect of the narrow frame is realized, and the user experience is improved. The electronic device also improves the quality of the product because of the effect of the narrow frame after being equipped with the liquid crystal display including the liquid crystal panel200of the present application.

The foregoing electronic device may be any device having communication and storage functions, such as a smart device with network capabilities, illustrated as a tablet computer, a mobile phone, an e-reader, a remote controller, a personal computer (PC), a notebook computer, an in-vehicle device, a network television, a wearable device, etc.