Display panel, display device and repairing method of display panel

The present application provides a display panel, a display device and a repairing method of the display panel, the display panel includes: a color filter substrate; an array substrate opposite to the color filter substrate and provided with a plurality of pixel areas at intervals, and each of the pixel areas including a signal line and a light-emitting diode electrically connected with the signal line; a liquid crystal layer located between the array substrate and the color filter substrate; a common electrode located on a surface of the color filter substrate facing the liquid crystal layer; and a plurality of compensation electrodes arranged at intervals and located on a surface of the array substrate facing the liquid crystal layer, the common electrode is opposite to the compensation electrodes, and the plurality of compensation electrodes corresponding to the plurality of light-emitting diodes one by one.

CROSS REFERENCE TO RELATED APPLICATIONS

The present application claims priority to a Chinese patent application No. 202010977083.5, filed on Sep. 16, 2020 with the China National Intellectual Property Administration, entitled “display panel, display device and repairing method of display panel”, the entirety content of which is incorporated herein by reference.

TECHNICAL FIELD

The present application relates to a technology field of display devices, particularly relates to a display panel, a display device and a repairing method of display panel.

BACKGROUND

With a rapid development of the display panel industry, the manufacturing process technology of the display panel has become more mature. Display panels using light-emitting diodes (LEDs) are also becoming more and more popular. However, during the manufacturing process, the light-emitting diodes may often be damaged due to certain factors, thereby increasing the possibility of repairing the display panels. In order to avoid this problem, the related art adopts a method of installing a plurality of light-emitting diodes in the pixels of a display panel. Although this method can reduce the possibility of repairing the display panel, it leads to an increase of the cost of the light-emitting diodes and a reduction of the available space in the pixels of the display panel.

The above content is only used to assist the understanding of the technical solution of the present application, and does not mean that the above content is recognized as prior art.

SUMMARY

A main purpose of the present application is to provide a display panel, aiming at reducing a number of the light-emitting diodes and production cost.

In order to realize the above-mentioned purpose, the present application provides a display panel, including:

a color filter substrate;

an array substrate opposite to the color filter substrate and provided with a plurality of pixel areas at intervals, each of the plurality of pixel areas comprising a signal line and a light-emitting diode electrically connected with the signal line;

a liquid crystal layer located between the array substrate and the color filter substrate;

a common electrode located on a surface of the color filter substrate facing the liquid crystal layer; and

a plurality of compensation electrodes arranged at intervals and located on a surface of the array substrate facing the liquid crystal layer, the common electrode being opposite to the plurality of compensation electrodes, and the plurality of compensation electrodes corresponding to the plurality of one light-emitting diodes one by one.

In one embodiment of the present application, the compensation electrodes are located above the signal lines.

In one embodiment of the present application, the common electrode is a transparent electrode, and the compensation electrode is a conductive electrode.

In one embodiment of the present application, further including a repairing line for connecting a compensation electrode corresponding to an abnormal light-emitting diode with a corresponding signal line when at least one of the abnormal light-emitting diodes is detected.

In one embodiment of the present application, a voltage applied to a compensation electrode corresponding to the abnormal light-emitting diode is U1, and a voltage applied to a compensation electrode adjacent to the abnormal light-emitting diode is U2, wherein U2>U1.

The present application also provides a repairing method of a display panel, applied on the display panel, including:

providing a color filter substrate and an array substrate are opposite to the color filter substrate, the array substrate being provided with a plurality of pixel areas at intervals, and each of the plurality of pixel areas being provided with a signal line and a light-emitting diode electrically connected with the signal line;

providing a liquid crystal layer to be located between the array substrate and the color filter substrate;

providing a common electrode to be located on a surface of the color filter substrate facing the liquid crystal layer;

providing a plurality of compensation electrodes to be arranged at intervals and located on a surface of the array substrate facing the liquid crystal layer, the common electrode being opposite to the plurality of compensation electrodes, and one compensation electrode corresponding to one light-emitting diode;

performing a detection process to determine whether at least one light-emitting diode is abnormal; and

performing a repairing process to connect the compensation electrodes that corresponds to an abnormal light-emitting diode with a corresponding signal line when at least one of abnormal light-emitting diodes is detected.

In one embodiment of the present application, before performing a detection process, further includes: putting the compensation electrodes above the signal lines.

In one embodiment of the present application, when a repairing process is performed, a step taken is: applying a voltage U1 to a compensation electrode corresponding to the abnormal light-emitting diode, and applying a voltage U2 to a compensation electrode adjacent to the abnormal light-emitting diode, wherein U2>U1.

In one embodiment of the present application, before performing a repairing process, further includes: providing a repairing line for connecting a compensation electrode corresponding to an abnormal light-emitting diode with the corresponding signal line when at least one of the abnormal light-emitting diodes is detected.

The present application also provides a display device, includes the above-mentioned display panel.

The display panel of the present application includes a color filter substrate, an array substrate, a liquid crystal, a common electrode and a plurality of compensation electrode, an array substrate is opposite to the color filter substrate and provided with a plurality of pixel areas at intervals, and each of the plurality of pixel areas comprises a signal line and a light-emitting diode electrically connected with the signal line; a liquid crystal layer is located between the array substrate and the color filter substrate; a common electrode is located on a surface of the color filter substrate facing the liquid crystal layer; a plurality of compensation electrodes are arranged at intervals and located on a surface of the array substrate facing the liquid crystal layer, the common electrode is opposite to the plurality of compensation electrodes, and one compensation electrode corresponding to one light-emitting diode. In such way, when a light-emitting diode is abnormal, a deflection direction of liquid crystal molecules in the liquid crystal layer is adjusted through a corresponding compensation electrode, thereby controlling a direction of the light, so as to solve the technical problem of dishomogeneous brightness of the display panel caused by the abnormal light-emitting diodes. The present application adjusts the deflection direction of the liquid crystal molecules in the liquid crystal layer through the compensation electrodes, thereby controlling a direction of the light. For there is no need to set a spare light-emitting diode in a pixel area to solve the technical problem of the dishomogeneous brightness of the display panel caused by abnormal light-emitting diodes, the number of light-emitting diodes and saving production costs are reduced.

The realization of the purposes, functional characteristics, and advantages of the present application will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

DETAILED DESCRIPTION OF THE EMBODIMENTS

The technical solutions in the embodiments of the present application will be clearly and completely described in conjunction with the drawings in the embodiments of the present application as below. Obviously, the described embodiments are only a portion of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by one of ordinary skill in the art without any creative work shall fall within the protection scope of the present application.

It should be noted that all directional indications (such as up, down, left, right, front, back . . . ) in the embodiments of the present application are only set to explain the relative position relationship, movement situation, etc. between components in a specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will change accordingly.

In the present application, unless otherwise specifically stipulated and defined, the terms “connect”, “fix”, etc. should be interpreted broadly, such as, “fix” can be a fixed connection, a detachable connection, or be integrated as a whole, a mechanical connection or an electrical connection, directly connected or indirectly connected through an intermediate medium, and an internal communication between two components or an interaction relationship between two components. Unless otherwise specifically defined, for one of ordinary skill in the art, the specific meaning of the above terms in the present application can be understood according to the specific situation.

In addition, the description of “first”, “second”, etc. involved in the present application are only set for descriptive purposes, and cannot be understood as indicating or implying their relative importance or implicitly indicating a number of indicated technical features. Therefore, the features defined with “first”, “second” may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but must be based on what can be achieved by one of ordinary skill in the art. When a combination of technical solutions is contradictory or cannot be achieved, it should be considered that such a combination of technical solutions does not exist, and is not within the protection scope required by the present application.

The present application provides a display panel100.

Referring toFIGS. 1 and 3, in the embodiments of the present application, the display panel100includes:

a color filter substrate10;

an array substrate20opposite to the color filter substrate10and provided with a plurality of pixel areas21at intervals, each of the plurality of pixel areas21including a signal line211and a light-emitting diode212electrically connected with the signal line211;

a liquid crystal layer30located between the array substrate20and the color filter substrate10;

a common electrode40located on a surface of the color filter substrate10facing the liquid crystal layer30; and

a plurality of compensation electrodes50arranged at intervals and located on a surface of the array substrate20facing the liquid crystal layer30, the common electrode40being opposite to the plurality of compensation electrodes50, and the plurality of compensation electrodes212corresponding to the plurality of light-emitting diodes50one by one.

Specifically, the array substrate20is a transparent substrate, such as a glass substrate, a quartz substrate, etc. The array substrate20includes a plurality of pixel areas21arranged in an array. Signal lines211are insulated from each other and intersect to define the plurality of pixel areas21. The signal lines211include horizontal signal lines and vertical signal lines perpendicular to the horizontal signal lines, and two adjacent horizontal signal lines211and two adjacent vertical signal lines211enclose a pixel area21.

The signal lines211are made of conductive material, such as aluminum alloy, chromium, etc. The light emitting diode212is provided in one of the pixel areas21and is electrically connected with one of the horizontal signal lines and one of the vertical signal lines. The common electrode40is located on the surface of the color filter substrate10facing the liquid crystal layer30. The common electrode40is opposite to the plurality of compensation electrodes50. One compensation electrode50corresponds to one light emitting diode212. When the display panel100displays normally, there is no need to apply a voltage across the common electrode40and the compensation electrodes50, liquid crystal molecules in the liquid crystal layer30do not deflect and produce no prism effect. When a common voltage is applied across the common electrode40and the compensation electrodes50, and a high voltage is applied to an adjacent compensation electrode50, the liquid crystals without being applied with a high voltage are deflected and have a lower refractive index, and the liquid crystal molecules applied with the high voltage have a higher refractive index, the optical effect produced can be equivalent to a thin prism. When passing through the thin prism, the light will deflect to one side to achieve the light deflection. It should be noted that only half of the light (that is, extraordinary light) will deflect (that is, changes its direction), and the other half of the light (ordinary light) will not change its direction.

The display panel100of the present application includes: a color filter substrate10, an array substrate20, a liquid crystal layer30, a common electrode40and a plurality of compensation electrode50. The array substrate20is opposite to the color filter substrate10. The array substrate20is provided with a plurality of pixel areas21at internals. Each of the plurality of pixel areas21is provided with a signal line211and a light-emitting diode212electrically connected with the signal line211. The liquid crystal layer30is located between the array substrate20and the color filter substrate10. The common electrode40is located on a surface of the array substrate20facing the liquid crystal layer30. The plurality of compensation electrodes50are arranged at internals and located on a surface of the color filter substrate10facing the liquid crystal layer30. The common electrode40is opposite to the plurality of compensation electrodes50. One compensation electrode50corresponds to one light-emitting diode212. When a light-emitting diode212is abnormal, a deflection direction of liquid crystal molecules in the liquid crystal layer30is adjusted through a corresponding compensation electrode50, thereby controlling a direction of the light, so as to solve the technical problem of dishomogeneous brightness of the display panel caused by the abnormal light-emitting diode212. The present application adjusts the deflection direction of the liquid crystal molecules in the liquid crystal layer30through the compensation electrodes50, thereby controlling a direction of the light. For there is no need to set a spare light-emitting diode212in a pixel area21to solve the technical problem of the dishomogeneous brightness of the display panel100caused by abnormal light-emitting diodes212, the number of light-emitting diodes212and production costs are reduced.

Further, in order to avoid affecting a display effect of the display panel, the compensation electrodes50are located above the signal lines211. Each of the compensation electrode50is strip-shaped and an extension direction of the compensation electrode50is same as an extension direction of the signal lines211. For example, if the compensation electrodes50are arranged above the vertical signal lines, the extension direction of the compensation electrodes50are consistent with a vertical direction.

Further, the common electrode40is a transparent electrode, and the compensation electrodes50are conductive electrodes.

In this embodiment, the common electrode40is a transparent electrode made from at least one of an indium tin oxide (ITO), indium zinc oxide (IZO), zinc oxide (ZnO), indium oxide (In2O3), indium gallium oxide (IGO) and aluminum zinc oxide (AZO). The compensation electrodes50are conductive electrodes, for example they can be metal, metal oxide or organic conductive layers. The purpose of the present application is to control deflection directions of liquid crystal molecules through the common electrode40and the compensation electrodes50. Generally, the common electrode40and the compensation electrodes50are connected with their corresponding substrates by floating connection.

Please refer toFIG. 2, the display panel100further includes a repairing line60. When at least one of the light-emitting diodes212is abnormal, the repairing line60is for connecting a compensation electrode50corresponding to the abnormal light-emitting diode212with a corresponding signal line211.

In this embodiment, an abnormality of a light-emitting diode212may be that the light-emitting diode212is damaged or a circuit connected thereto is abnormal, resulting that the light-emitting diode212does not emit light. The repairing line60is a laser-repairing line. When at least one of the light-emitting diodes212is abnormal, the repairing line60electrically connects the compensation electrode50corresponding to the light-emitting diode212with the corresponding signal line211. A voltage is applied across the compensation electrode50and the common electrode40to control a deflection direction of the liquid crystal molecules, thereby controlling the direction of light.

Further, due to light of a normal light-emitting diode212is more bright, in order to deflect light of a normal light-emitting diode212to an adjacent abnormal light-emitting diode212and make the liquid crystal molecules deflect, a voltage applied to a compensation electrode corresponding to the abnormal light-emitting diode is U1, and a voltage applied to a compensation electrode adjacent to the abnormal light-emitting diode is U2, where U2>U1.

The present application also provides a repairing method of display panel, applied on the display panel100. The specific structure of the display panel100refers to the above-mentioned embodiments. Due to the repairing method of the display panel adopts all the technical solutions of the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which won't be repeated here.

Please refer toFIG. 4, the repairing method of display panel adopts steps as below:

S10, providing a color filter substrate10and an array substrate20opposite to the color filter substrate10, the array substrate20being provided with a plurality of pixel areas21at intervals, and each of the plurality of pixel areas21being provided with a signal line211and a light-emitting diode212electrically connected with the signal line211;

S20, providing a liquid crystal layer30to be located between the array substrate20and the color filter substrate10;

S30, providing a common electrode40to be located on a surface of the color filter substrate10facing the liquid crystal layer30;

S40, providing a plurality of compensation electrodes50to be arranged at intervals and located on a surface of the array substrate20facing the liquid crystal layer30, the common electrode40being opposite to the plurality of compensation electrodes50, and the plurality of compensation electrodes212corresponding to the plurality of light-emitting diodes50one by one;

S50, performing a detection process to determine whether at least one light-emitting diode212is abnormal; and

S60, performing a repairing process to connect the compensation electrodes that corresponds to an abnormal light-emitting diode with a corresponding signal line when the abnormal light-emitting diodes is detected.

In this embodiment, there are two light-emitting diodes212, one is P1 and the other is P2. When the light-emitting diodes212are normal, the display panel100operates normally according to the structure shown inFIG. 1. The detection process may include at least one of an electrical detection process or an optical detection process. The optical detection process adopts a light source to generate an excitation light to induce the light-emitting diode212to emit fluorescence, and adopts a scan camera to detect a situation of the fluorescence emitted by the diode212at a specific wavelength, thereby determining whether the light-emitting diode212is damaged. The electrical detection process adopts a probe to give a signal required by the light-emitting diode212to the light-emitting diode212, thereby determining whether the light-emitting diode212operates normally. For example, if the detection result shows that the light-emitting diodes212of all pixel areas21are normal, there is no need to perform the repairing process. If the detection result shows that the light-emitting diode212of a certain pixel area21is malfunction, it is determined that the light emitting diode212is abnormal.

When a certain light-emitting diode212such as light-emitting diode P2 is abnormal, a repairing process is performed. A compensation electrode50corresponding to the abnormal light-emitting diode P2 is connected with the corresponding signal line211, so that a high voltage is applied to a compensation electrode50corresponding to the light-emitting diode P1, and a low voltage is applied to the compensation electrode50corresponding to the light-emitting diode P2, a uneven electric field is formed, resulting that some liquid crystal molecules deflect. As shown inFIG. 3, the light-emitting diode P1 is normal, at this time, the light emitted by the light-emitting diode P1 will be deflected correspondingly according to the deflection of the liquid crystal molecules, thereby a part of the light will be shared to the abnormal light-emitting diode P2, so that there is no obvious dark spot and the problem of the related art is avoided.

Please refer toFIG. 5, before performing the detection process, the method further includes the following steps:

S70, putting the compensation electrodes50above signal lines211. The compensation electrodes50are put above the signal lines211through floating connection to avoid affecting the display effect.

Further, the repairing process further includes:

applying a voltage U1 to a compensation electrode50corresponding to the abnormal light-emitting diode212, and applying a voltage U2 to a compensation electrode50adjacent to the abnormal light-emitting diode212, where U2>U1.

Please refer toFIG. 6, before performing the repairing process, the method further includes the following steps:

S80, providing a repairing line60for connecting a compensation electrode50corresponding to an abnormal light-emitting diode212with the corresponding signal line211when at least one of the light-emitting diodes212is abnormal.

In this embodiment, there are two light-emitting diodes212, one is P1 and the other is P2. When the light-emitting diodes212are normal, the display panel100operates normally according to the structure shown inFIG. 1. When a certain light-emitting diode212such as P2 is normal, the repairing line60which is a laser-repairing line connects a compensation electrode50corresponding to the light-emitting diode P1 with the signal line211, so that a high voltage is applied to the compensation electrode50corresponding to the light-emitting diode P1, and a low voltage is applied to the compensation electrode50corresponding to the light-emitting diode P2, thereby forming a high and low uneven electric field, resulting that some liquid crystal molecules deflect. As shown inFIG. 3, the light-emitting diode P1 is normal, at this time, the light emitted by the light-emitting diode P1 will be deflected correspondingly according to the deflection of the liquid crystal molecules, thereby a part of the light will be shared to the abnormal light-emitting diode P2, so that the dark spot is not obvious, thereby solving the problem of the prior art.

The present application also provides a display device, which includes a display panel100. A specific structure of the display panel100refers to the above-mentioned embodiments. Due to the display device adopts all the technical solutions of all the above-mentioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which won't be repeated here.

The display device can be products or elements with display functions, such as a liquid crystal panel, an electronic paper, an LED panel, a liquid crystal TV, a liquid crystal display, a digital photo frame, a mobile phone, a tablet computer, etc., especially the display device using liquid crystal prism.

The above descriptions are only optional embodiments of the present application, and do not limit the scope of the present application. Under the concept of the present application, the equivalent structure transformations made by using the description and drawings of the present application, or direct/indirect applications to other related technical fields are all included in the claimed scope of the present application.