CN115953992B

CN115953992B - Display panel and display device

Info

Publication number: CN115953992B
Application number: CN202211733938.5A
Authority: CN
Inventors: 陆逸明; 赵剑
Original assignee: Shanghai Tianma Microelectronics Co Ltd
Current assignee: Shanghai Tianma Microelectronics Co Ltd
Priority date: 2022-12-30
Filing date: 2022-12-30
Publication date: 2024-06-04
Anticipated expiration: 2042-12-30
Also published as: CN115953992A

Abstract

The application discloses a display panel and a display device, wherein a plurality of heating wires are introduced into a display area, so that the heating wires heat the display panel under the control of heating voltage signals in a low-temperature environment, the normal use requirement of the display panel in the low-temperature environment is met, the situation that a first driving component and a second driving component need to interact with each other through a first connecting wire is considered, a heating bus for transmitting the heating voltage signals overlaps with the first connecting wire to generate a capacitive coupling effect is considered, and therefore, in the starting stage and/or the closing stage of the heating wires, the heating voltage signals are gradually changed from a current voltage signal to a target voltage signal, so that the capacitive coupling effect of the heating voltage signals and the signals on the first connecting wire is reduced, the signal on the first connecting wire is an active signal, the smaller capacitive coupling effect can be quickly recovered, the abnormal display caused by the capacitive coupling effect is effectively avoided, and the display reliability of a display in the low-temperature environment is improved.

Description

Display panel and display device

Technical Field

The present application relates to the field of display technologies, and in particular, to a display panel and a display device.

Background

The liquid crystal has both the birefringence peculiar to the crystal and the fluidity of the liquid. The liquid crystal display is a display device manufactured by using liquid crystal molecules to change optical characteristics thereof under the action of an external electric field, and has been widely used in various displays and electronic instruments. However, the liquid crystal material limits, the response time of the liquid crystal at low temperature is prolonged, and after the response time of the liquid crystal is prolonged, the display image quality is deteriorated, and the problems of tailing, smearing and the like of dynamic images can occur, so that the visual effect is affected.

However, many lcd devices need to operate at low temperature, for example, in the field of vehicle-mounted display, the display device needs to quickly enter a normal operating state after being started at low temperature, so how to effectively improve the display reliability of the display device in a low-temperature environment is a technical problem to be solved by those skilled in the art.

Disclosure of Invention

In order to solve the above technical problems, embodiments of the present application provide a display panel and a display device, so as to effectively improve display reliability of a display in a low-temperature environment.

In order to achieve the above purpose, the embodiment of the present application provides the following technical solutions:

a display panel comprising a display region and a non-display region at least partially surrounding the display region;

The display area is provided with a plurality of first signal lines extending along a first direction, a plurality of second signal lines extending along a second direction and a plurality of heating wires, and the first direction and the second direction are intersected;

The non-display area is provided with a first driving component electrically connected with the first signal wire, a second driving component electrically connected with the second signal wire, and a first voltage end and a second voltage end which are electrically connected with the heating wiring, wherein the first driving component and the second driving component are electrically connected through a first connecting wire, and the heating wiring is electrically connected with the first voltage end through a first heating bus and is electrically connected with the second voltage end through a second heating bus;

The first connection line overlaps the first heating bus line and/or the first connection line overlaps the second heating bus line in a direction perpendicular to a plane in which the display panel is located;

The first voltage terminal receives a heating voltage signal, the working time of the heating voltage signal comprises a first time period, the first time period corresponds to the starting stage or the closing stage of the heating wire, and the heating voltage signal is gradually changed from the current voltage signal to the target voltage signal in the first time period.

A display device comprises the display panel.

Compared with the prior art, the technical scheme has the following advantages:

according to the display panel and the display device provided by the embodiment of the application, the plurality of heating wires are led in the display area, the heating wires are electrically connected with the first voltage end through the first heating bus of the non-display area, the heating voltage signals are received, and the heating wires are electrically connected with the second voltage end through the second heating bus of the non-display area, so that the heating wires heat the display panel under the control of the heating voltage signals in a low-temperature environment, and the normal use requirement of the display panel in the low-temperature environment is met.

Meanwhile, considering that a first driving component and a second driving component are further arranged in the non-display area, the first driving component is electrically connected with a plurality of first signal lines in the display area, the second driving component is electrically connected with a plurality of second signal lines in the display area, and driving signals or cascading signals are required to be interacted between the first driving component and the second driving component through the first connecting lines. However, in a direction perpendicular to the plane of the display panel, the first connection line inevitably overlaps the first heating bus and/or the second heating bus, so that a larger capacitive coupling effect is generated during the start-up phase and the shut-down phase of the heating wiring, and the signal on the first connection line is influenced, resulting in abnormal display. Therefore, in the display panel and the display device provided by the embodiments of the present application, the heating voltage signal is gradually changed from the current voltage signal to the target voltage signal in the start-up phase and/or the close phase of the heating trace, so that the capacitive coupling effect between the heating voltage signal and the signal on the first connection line is reduced, and the signal on the first connection line is an active signal, so that the smaller capacitive coupling effect can be quickly recovered, and display abnormality caused by the capacitive coupling effect is effectively avoided.

Therefore, the display panel and the display device provided by the embodiment of the application not only introduce the heating wire to heat the display panel in the low-temperature environment, but also control the heating voltage signal on the heating wire to effectively avoid the influence of the heating voltage signal on the first connecting wire, thereby effectively improving the display reliability of the display in the low-temperature environment.

Drawings

In order to more clearly illustrate the embodiments of the application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described, it being obvious that the drawings in the following description are only some embodiments of the application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic plan view of a display panel according to an embodiment of the application;

FIG. 2 is a schematic diagram of another planar structure of a display panel according to an embodiment of the application;

FIG. 3 is a schematic diagram of a display panel according to another embodiment of the present application;

FIG. 4 is a schematic cross-sectional view of a display panel according to an embodiment of the application;

FIG. 5 is a schematic diagram of another planar structure of a display panel according to an embodiment of the application;

Fig. 6 is a schematic diagram of a heating voltage signal received by a first voltage terminal in the display panel according to the embodiment of the application;

fig. 7 is a schematic diagram of a voltage signal on a corresponding first connection line when a first voltage terminal receives a heating voltage signal in the display panel according to the embodiment of the application;

fig. 8 is a schematic diagram of a voltage signal on a corresponding first connection line when a first voltage terminal receives an original heating voltage signal in the display panel according to the embodiment of the application;

Fig. 9 is a schematic diagram of another heating voltage signal received by the first voltage terminal in the display panel according to the embodiment of the application;

Fig. 10 is a schematic diagram of another heating voltage signal received by the first voltage terminal in the display panel according to the embodiment of the application;

Fig. 11 is a schematic diagram of a voltage signal on a corresponding first connection line when a first voltage terminal receives another heating voltage signal in the display panel according to the embodiment of the application;

Fig. 12 is a schematic diagram of another heating voltage signal received by the first voltage terminal in the display panel according to the embodiment of the application;

Fig. 13 is a schematic diagram of a voltage signal on a corresponding first connection line when a first voltage terminal receives a further heating voltage signal in the display panel according to the embodiment of the application;

fig. 14 is a schematic plan view of a display panel according to an embodiment of the application;

Fig. 15 is a schematic plan view of a display device according to an embodiment of the application.

Detailed Description

The following description of the embodiments of the present application will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present application, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present application, but the present application may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present application is not limited to the specific embodiments disclosed below.

As described in the background section, how to effectively improve the display reliability of a display in a low-temperature environment is a technical problem to be solved by those skilled in the art.

In view of the above, an embodiment of the present application provides a display panel 100, and fig. 1 to 3 are schematic plan views of three plan structures of the display panel provided in the embodiment of the present application, as shown in fig. 1 to 3, the display panel 100 includes a display area AA and a non-display area NA at least partially surrounding the display area AA;

The display area AA is provided with a plurality of first signal lines 10 extending in a first direction X, and a plurality of second signal lines 20 and a plurality of heating traces 30 extending in a second direction Y, the first direction X and the second direction Y intersecting;

the non-display area NA is provided with a first driving assembly 110 electrically connected to the first signal line 10, a second driving assembly 120 electrically connected to the second signal line 20, and a first voltage terminal 130 and a second voltage terminal 140 electrically connected to the heating trace 30, the first driving assembly 110 and the second driving assembly 120 are electrically connected through the first connection line 40, and the heating trace 30 is electrically connected to the first voltage terminal 130 through the first heating bus 50 and to the second voltage terminal 140 through the second heating bus 60;

The first connection line 40 overlaps the first heating bus line 50 and/or the first connection line 40 overlaps the second heating bus line 60 in a direction perpendicular to a plane in which the display panel 100 is located;

The first voltage terminal 130 receives the heating voltage signal U, the working time of the heating voltage signal U includes a first period T1, the first period T1 corresponds to the start-up phase or the shut-down phase of the heating trace 30, and the heating voltage signal U gradually changes from the current voltage signal to the target voltage signal in the first period T1.

In the display panel 100 provided in the embodiment of the present application, as shown in fig. 1-3, a plurality of heating traces 30 are introduced into the display area AA, a first end (non-arrow end in fig. 1-3) of the heating trace 30 is electrically connected with the first voltage end 130 through the first heating bus 50 of the non-display area NA, receives the heating voltage signal U, and a second end (arrow end in fig. 1-3) of the heating trace 30 is electrically connected with the second voltage end 140 through the second heating bus 60 of the non-display area NA, so that the heating trace 30 heats the display panel 100 under the control of the heating voltage signal U in a low-temperature environment, thereby meeting the normal use requirement of the display panel 100 in the low-temperature environment.

In the embodiment of the present application, the first voltage terminal 130 receives the heating voltage signal U, which is a positive voltage terminal, and the second voltage terminal 140 is a negative voltage terminal, and a certain dc voltage signal is provided to the heating trace 30 through the first voltage terminal 130 and the second voltage terminal 140, so that the heating trace 30 generates heat to heat the display panel 100.

Alternatively, the display panel 100 provided by the embodiment of the application is a liquid crystal display panel, and fig. 4 is a schematic cross-sectional view of the display panel 100 provided by the embodiment of the application, as shown in fig. 4, the display panel 100 includes an array substrate 101 and a color film substrate 102 disposed opposite to each other, and liquid crystal molecules disposed between the array substrate 101 and the color film substrate 102. The heating trace 30 may be disposed on the array substrate 101, or may be disposed on the color film substrate 102, or may be disposed on both the array substrate 101 and the color film substrate 102, which may perform a heating function on the liquid crystal in a low-temperature environment, so as to meet a use requirement of the display panel 100 in the low-temperature environment.

Compared with the prior art that a heater is arranged outside the display panel to heat the display panel, the display panel 100 provided by the embodiment of the application has the advantages that the heating wire 30 is closer to the liquid crystal molecules by introducing the plurality of heating wires 30 into the display area AA, the heat generated by the heating wire 30 can directly act on the liquid crystal molecules to heat the liquid crystal molecules in the display panel, the heating speed is improved, the display can quickly reach the normal working state under the condition of low-temperature starting in the vehicle-mounted display field, and the structure of the display panel is greatly simplified compared with the scheme of additionally introducing the heater in the prior art.

In addition, the display panel 100 provided by the embodiment of the application can control the heating voltage signal U according to the need, so that the display panel 100 is heated according to the need, so as to keep the liquid crystal molecules at a proper working temperature, reduce the viscous resistance of the liquid crystal molecules, improve the state change speed of the liquid crystal molecules, and be beneficial to improving the tailing phenomenon of the display image and improving the display quality.

In this embodiment of the present application, optionally, the first signal line 10 is a gate signal line, the second signal line 20 is a data signal line, at this time, the area defined by two adjacent gate signal lines and two adjacent data signal lines is a pixel area, and when the gate signal line provides a conducting signal to the pixel area, the liquid crystal molecules corresponding to the pixel area deflect in response to the data signal on the data signal line, so as to realize the display of the picture. Of course, alternatively, the first signal line 10 is a data signal line, and the second signal line 20 is a gate signal line. The following description will proceed with taking the first signal line 10 as a gate signal line and the second signal line 20 as a data signal line as an example.

When the first signal line 10 is a gate signal line and the second signal line 20 is a data signal line, as shown in fig. 1 to 3, the second driving component 120 is a control chip IC1, and the control chip IC1 provides a data signal to the second signal line 20 through the first lead 21 on one hand and provides a driving signal or a cascade signal to the first driving component 110 through the first connection line 40 on the other hand.

Alternatively, as shown in fig. 1 to 3, the first driving assembly 110 may include a gate driving circuit including a shift register ASG in cascade, and the shift register ASG is electrically connected to the first signal line 10 to supply the scan signal to the first signal line 10. It should be noted that, the first driving component 110 may be disposed only on one side of the display area AA in the first direction X (e.g. on the left side or the right side of the display area AA in fig. 1-3), so as to implement single-sided driving, and of course, the first driving component 110 may also be disposed on two opposite sides of the display area AA in the first direction X (e.g. on the left side and the right side of the display area AA in fig. 1-3), so as to implement double-sided driving.

At this time, the second driving component 120 (the control chip IC 1) needs to be electrically connected to the first driving component 110 through the first connection line 40 to provide a driving signal for the first driving component 110, so as to control the shift register ASG in the first driving component 110 to scan the first signal line 10 in the display area AA from top to bottom, or from bottom to top, for example, to realize a function of row-by-row display.

As another alternative, as shown in fig. 5, fig. 5 is a schematic plan view of a display panel according to an embodiment of the present application, it can be seen that the first driving component 110 may also include at least one gate driving chip IC2, where the gate driving chip IC2 is electrically connected to the first signal line 10 through the second lead 11 to provide the scan signal to the first signal line 10.

At this time, the second driving assembly 120 (the control chip IC 1) includes a timing control module, and the timing control module in the second driving assembly 120 is electrically connected to the first driving assembly 110 through the first connection line 40 to provide a timing cascade signal for the first driving assembly 110.

It can be seen that the first driving component 110 and the second driving component 120 need to perform the interaction of the driving signal or the cascade signal through the first connection line 40. However, in a direction perpendicular to the plane of the display panel 100, as shown in fig. 1 to 3 and 5, the first connection line 40 inevitably overlaps the first heating bus line 50 and/or the second heating bus line 60, wherein fig. 1 and 5 show a case where the first connection line 40 overlaps the first heating bus line 50, fig. 2 shows a case where the first connection line 40 overlaps the second heating bus line 60, and fig. 3 shows a case where the first connection line 40 overlaps both the first heating bus line 50 and the second heating bus line 60. Also, as shown in fig. 1 to 3 and 5, the lead wire connecting the second driving assembly 120 (control chip IC 1) and the second signal line 20 may overlap the first heating bus 50 or the second heating bus 60. As shown in fig. 3, the leads connecting the first driving assembly 110 and the first signal line 10 may also overlap the first heating bus 50 or the second heating bus 60.

The heating voltage signal U is usually a direct current voltage signal, that is, the heating voltage signal U is directly increased from the current voltage signal to the target voltage signal in the start-up phase of the heating trace 30, and similarly, the heating voltage signal U is also directly reduced from the current voltage signal to the target voltage signal in the shut-down phase of the heating trace 30, so that the heating voltage signal U is greatly changed in a very short time in both the start-up phase and the shut-down phase of the heating trace 30, and then, a larger capacitive coupling effect is generated at the overlapping position of the first connecting line 40 and the first heating bus 50 and/or the overlapping position of the first connecting signal line 40 and the second heating bus 60, which affects the signal on the first connecting line 40, resulting in abnormal display.

Therefore, in the display panel provided by the embodiment of the application, the heating voltage signal U is gradually changed from the current voltage signal to the target voltage signal in the start-up phase and/or the close phase of the heating trace 30, so that the capacitive coupling effect between the heating voltage signal U and the signal on the first connection line 40 is reduced, and the signal on the first connection line 40 is an active signal, so that the smaller capacitive coupling effect can be quickly recovered, and the abnormal display caused by the capacitive coupling effect can be avoided.

It should be noted that, when the first connection line 40 overlaps the first heating bus 50, as shown in fig. 1, 3 and 5, since the first heating bus 50 is directly electrically connected to the first voltage terminal 130, the heating voltage signal U received by the first voltage terminal 130 is controlled to gradually change to the target voltage signal, so as to reduce the capacitive coupling effect at the overlapping position of the first connection line 40 and the first heating bus 50. When the first connection line 40 overlaps the second heating bus 60, as shown in fig. 2, since the first voltage terminal 130, the first heating bus 50, the plurality of heating traces connected in parallel, the second heating bus 60 and the second voltage terminal 140, which are electrically connected in sequence, form a current path, the heating voltage signal U received by the first voltage terminal 130 is controlled to gradually change to the target voltage signal, and the capacitive coupling effect at the overlapping position of the first connection line 40 and the second heating bus 60 is reduced through the current path.

Similarly, the heating voltage signal U received by the first voltage terminal 130 is controlled to gradually change to the target voltage signal, so that the capacitive coupling effect at the overlapping portion of the lead wire for connecting the second driving component 120 (the control chip IC 1) and the second signal line 20 and the first heating bus 50 or the second heating bus 60 is reduced, and the capacitive coupling effect at the overlapping portion of the lead wire for connecting the first driving component 110 and the first signal line 10 and the first heating bus 50 or the second heating bus 60 is reduced.

Therefore, in the display panel provided by the embodiment of the application, the heating trace 30 is introduced to heat the display panel 100 in the low-temperature environment, and the heating voltage signal U on the heating trace 30 is controlled to effectively avoid the influence of the heating voltage signal U on the signal on the first connection line 40, so that the display reliability of the display in the low-temperature environment is effectively improved.

In the embodiment of the present application, the working time of the heating voltage signal U includes a first time period T1, where the first time period T1 corresponds to the start-up phase or the close phase of the heating wire 30, and in the first time period T1, the heating voltage signal U gradually changes from the current voltage signal to the target voltage signal. The implementation manner in which the heating voltage signal U gradually changes from the present voltage signal to the target voltage signal in the first period T1 is specifically described below.

Optionally, in an embodiment of the present application, as shown in fig. 6, the first period T1 includes n first sub-periods T1 arranged in sequence, the heating voltage signal of the (k+1) th first sub-period T1 is closer to the target voltage signal than the heating voltage signal in the (k) th first sub-period T1, and the heating voltage signal in any first sub-period T1 is unchanged, where 1.ltoreq.k.ltoreq.n-1, and k and n are integers.

As shown in fig. 6, the heating voltage signal U in the present embodiment is a step-wise heating voltage signal, denoted by U1. Specifically, in the 1 st first sub-period t1, the heating voltage signal U1 keeps U1 (1) unchanged, then the heating voltage signal U1 is changed to U1 (2), and in the 2 nd first sub-period t1, U1 (2) is closer to the target voltage signal U1 (x) than U1 (1), and so on, in the kth first sub-period t1, the heating voltage signal U1 keeps U1 (k) unchanged, then the heating voltage signal is changed to U1 (k+1), and in the kth+1th first sub-period t1, the U1 (k+1) is closer to the target voltage signal U1 (x) than the U1 (k), and finally, the heating voltage signal U1 is changed to the target voltage signal U1 (x) after keeping U1 (n) unchanged in the nth first sub-period t 1.

That is, in the present embodiment, the heating voltage signal U1 is changed from the current voltage signal U1 (1) to the target voltage signal U1 (x) in a step-like manner in the first period T1, and the heating voltage signal U1 is changed slowly in the first period T1, so that the capacitive coupling effect of the heating voltage signal U1 on the signal on the first connection line 40 is weak, and the signal on the first connection line 40 is an active signal, and the smaller capacitive coupling effect can be recovered quickly, thereby effectively avoiding abnormal display caused by the capacitive coupling effect.

In contrast, fig. 6 also shows a case where the original heating voltage signal U0, which is directly changed from the present voltage signal to the target voltage signal, is changed with time during the on-phase or the off-phase of the heating trace 30, that is, during the first period T1, it can be seen that the original heating voltage signal U0 is directly changed from the present voltage signal to the target voltage signal in an extremely short time.

It will be appreciated that in this embodiment, there is a very short period between the k+1th first sub-period t1 and the k first sub-period t1 for rapidly changing the heating voltage signal U1 from U1 (k) which remains unchanged during the k first sub-period t1 to U1 (k+1) which remains unchanged during the k+1th first sub-period t1, but this period is very short compared to the k+1th first sub-period t1 and the k first sub-period t1 which is negligible.

It should be noted that, in the present embodiment, although the heating voltage signal U1 is rapidly changed from U1 (k) to U1 (k+1) in a shorter time between the k+1th first sub-period t1 and the kth first sub-period t1, the difference between U1 (k) and U1 (k+1) is smaller, especially, is much smaller than the difference between the initial heating voltage signal U1 (1) and the target heating voltage signal U1 (x), so that the capacitive coupling effect generated at the overlapping portion of the first connection line 40 and the first heating bus 50 and/or the overlapping portion of the first connection signal line 40 and the second heating bus 60 is small, and the signal on the first connection line 40 is an active signal, and the smaller capacitive coupling effect can be rapidly recovered, thereby effectively avoiding the abnormal display caused by the capacitive coupling effect.

In this embodiment, the (k+1) th first sub-period t1 may be equal to the (k) th first sub-period t1 or may be unequal to the (k) th first sub-period t1, as the case may be.

It should be noted that, the number of segments n of the first sub-period T1 divided by the first period T1 is not limited, but n is greater than or equal to 2, but it is understood that the larger n is, i.e., the greater the number of segments of the first sub-period T1 divided by the first period T1 is, the slower the heating voltage signal U1 changes to the target voltage signal U1 (x), and the weaker the capacitive coupling effect on the signal on the first connection line 40 is. However, considering that the signal on the first connection line 40 is an active signal, the smaller capacitive coupling effect can be recovered quickly, so n can be properly selected, so that the capacitive coupling effect on the signal on the first connection line 40 can be weaker, and the heating voltage signal U1 can be changed to the target voltage signal U1 (x) more quickly, so that the heating trace 30 heats the display panel 100 more quickly.

Fig. 7 further shows a schematic diagram of the change of the voltage signal W1 on the first connection line 40 with time when the first voltage terminal 130 receives the step-type heating voltage signal U1 provided in this embodiment, in contrast, fig. 8 shows a schematic diagram of the change of the voltage signal W0 on the first connection line 40 with time when the first voltage terminal 130 receives the original heating voltage signal U0, and in contrast, fig. 7 and fig. 8 show that when the first voltage terminal 130 receives the original heating voltage signal U0, the original heating voltage signal U0 changes to the target heating signal in a very short time, so that the voltage signal W0 on the first connection line 40 fluctuates greatly, and when the first voltage terminal 130 receives the step-type heating voltage signal U1 provided in this embodiment, the voltage signal W0 on the first connection line 40 fluctuates less, the heating voltage signal U1 is changed from U1 (k) to U1 (k+1) rapidly only in a short time between the k1 first sub-time period t1, and the first sub-time period t1 is slightly changed, and the abnormal coupling effect on the first connection line 40 is avoided, which is an abnormal coupling effect due to the fact that the first connection line is slightly lost.

Alternatively, in another embodiment of the present application, as shown in fig. 9, the first period T1 includes m second sub-periods T2 sequentially arranged, and the heating voltage signal in any one of the second sub-periods T2 continuously changes in a direction approaching the target voltage signal.

As shown in fig. 9, the heating voltage signal U in the present embodiment is a continuously variable heating voltage signal, denoted by U2. Specifically, at the beginning of the 1 st second sub-period t2, the heating voltage signal U2 is U2 (1), then in the 1 st second sub-period t2, the heating voltage signal U2 is continuously changed from U2 (1) to U2 (2), the U2 (2) is closer to the target voltage signal U2 (x) than the U2 (1), and so on, at the beginning of the j th second sub-period t2, the heating voltage signal U2 is U2 (j), then in the j th second sub-period t2, the heating voltage signal U2 is continuously changed from U2 (j) to U2 (j+1), finally, at the beginning of the m th second sub-period t2, the heating voltage signal U2 is U2 (m), and in the m th second sub-period t2, the heating voltage signal U2 is continuously changed from U2 (m) to the target voltage signal U2 (x).

That is, in the present embodiment, the heating voltage signal U2 is continuously and slowly changed from the current voltage signal U2 (1) to the target voltage signal U2 (x) in the first period T1, and since the heating voltage signal U2 is slowly changed in the first period T1, the capacitive coupling effect of the heating voltage signal U2 on the signal on the first connection line 40 is weak, and the signal on the first connection line 40 is an active signal, the smaller capacitive coupling effect can be quickly recovered, and thus abnormal display caused by the capacitive coupling effect can be effectively avoided.

It should be noted that, the form of continuous change of the heating voltage signal U2 in any second sub-period t2 is not limited in the present application, i.e., the heating voltage signal U2 may be continuously changed in a diagonal form, a curved form, or the like in a direction approaching the target voltage signal in any second sub-period t 2.

It should be noted that, the present application is not limited to the same form of the continuous change of the heating voltage signal U2 in any two second sub-periods t2, i.e. in one second sub-period t2, the heating voltage signal U2 may continuously change in a diagonal manner, and in the other second sub-period t2, the heating voltage signal U2 may also continuously change in a diagonal manner, but may also continuously change in a form other than a diagonal manner, such as a curve. Even if the form of the continuous change of the heating voltage signal U2 in the two second sub-periods t2 is the same, the change slope of the heating voltage signal U2 in the two second sub-periods t2 may be the same or may be different.

Alternatively, in one embodiment of the present application, as shown in fig. 9, the heating voltage signal U2 in each second sub-period t2 continuously changes in a diagonal direction toward the target voltage signal, and at this time, the change of the heating voltage signal U2 in each second sub-period t2 is easy to control, so long as the heating voltage signal at the beginning of each second sub-period t2 and the change slope of the heating voltage signal U2 in each second sub-period t2 are set. In this embodiment, the slope of the change of the heating voltage signal U2 in the second sub-period t2 may be the same or different, as the case may be.

It should be noted that, in the present application, whether the heating voltage signal corresponding to the end of the j-th second sub-period t2 is equal to the heating voltage signal corresponding to the start of the j+1th second sub-period t2 is not limited.

Optionally, in an embodiment of the present application, as shown in fig. 9, a heating voltage signal corresponding to an end of the j-th second sub-period t2 is equal to a heating voltage signal corresponding to a start of the j+1th second sub-period t2, where 1.ltoreq.j.ltoreq.m-1, and j and m are integers. At this time, the second sub-periods t2 are immediately adjacent in sequence, that is, the end of the j-th second sub-period t2 is the start of the j+1th second sub-period t 2.

Optionally, in another embodiment of the present application, as shown in fig. 10, the heating voltage signal corresponding to the beginning of the j+1th second sub-period t2 is closer to the target voltage signal U2 (x) than the heating voltage signal corresponding to the end of the j-th second sub-period t2, where 1.ltoreq.j.ltoreq.m-1, and j and m are integers. At this time, the heating voltage signal corresponding to the start of the jth second sub-period t2 is U2 (j), the heating voltage signal corresponding to the end of the jth second sub-period t2 is U2 (j) ', the heating voltage signal corresponding to the start of the j+1th second sub-period t2 is U2 (j+1), U2 (j) ' is closer to the target voltage signal U2 (x) than U2 (j), and U2 (j+1) is closer to the target voltage signal U2 (x) than U2 (j) '.

In this embodiment, similarly to between the k+1th first sub-period t1 and the k first sub-period t1 in fig. 6, there is also a very short period between the end of the j-th second sub-period t2 and the beginning of the j+1th second sub-period t2 for rapidly changing the heating voltage signal U2 from the heating voltage signal U2 (j)' corresponding to the end of the j-th second sub-period t2 to the heating voltage signal U2 (j+1) corresponding to the beginning of the j+1th second sub-period t2, but the period is not Chang Duan, which is negligible compared to the j+1th second sub-period t2 and the j-th second sub-period t 2.

In the foregoing two embodiments, the j+1th second sub-period t2 may be equal to the j-th second sub-period t2 or may be unequal to the j-th second sub-period t2, as the case may be.

It should be noted that, the number m of the second sub-period divided by the first period T1 is not limited, but m is greater than or equal to 2, but it is understood that the larger m is, i.e. the more the number of the second sub-period T2 divided by the first period T1 is, the slower the heating voltage signal U2 changes to the target voltage signal U2 (x), and the weaker the capacitive coupling effect on the signal on the first connection line 40 is. However, considering that the signal on the first connection line 40 is an active signal, the smaller capacitive coupling effect can be recovered quickly, so that m can be properly selected, so that the capacitive coupling effect on the signal on the first connection line 40 can be weaker, and the heating voltage signal U2 can be changed to the target voltage signal U2 (x) more quickly, so that the heating trace 30 heats the display panel 100 more quickly.

Fig. 11 further shows a schematic diagram of the change of the voltage signal W2 on the first connection line 40 with time when the first voltage terminal 130 receives the continuously variable heating voltage signal U2 shown in fig. 9, and it can be seen from comparison with fig. 8 that the voltage signal W2 on the first connection line 40 fluctuates less when the first voltage terminal 130 receives the continuously variable heating voltage signal U2 shown in fig. 9, and the signal on the first connection line 40 is an active signal, so that the display abnormality caused by the capacitive coupling effect can be effectively avoided.

Alternatively, in still another embodiment of the present application, as shown in fig. 12, the first period T1 includes first sub-periods T1 and second sub-periods T2 alternately arranged, the heating voltage signal in any one of the first sub-periods T1 is unchanged, and the heating voltage signal in any one of the second sub-periods T2 is continuously changed in a direction approaching the target voltage signal.

As shown in fig. 12, the heating voltage signal in this embodiment is a mixture of the aforementioned step-by-step heating voltage signal U1 and the continuously variable heating voltage signal U2, that is, a mixed heating voltage signal, denoted by U3. Specifically, in the 1 st first sub-period t1, the heating voltage signal U3 keeps U3 (1) unchanged, then in the 1 st second sub-period t2, the heating voltage signal U3 continuously changes from U3 (1) to U3 (2), then in the 2 nd first sub-period t1, the heating voltage signal U3 keeps U3 (2) unchanged, and so on, in the i th first sub-period t1, the heating voltage signal U3 keeps U3 (i) unchanged, then in the i th second sub-period t2, the heating voltage signal U3 continuously changes from U3 (i) to U3 (i+1) until the heating voltage signal U3 changes to the target voltage signal U3 (x).

That is, in the present embodiment, the heating voltage signal U3 is kept unchanged in the first sub-period t1, and continuously changes to the target voltage signal U3 (x) in the second sub-period t2, and the first sub-period t1 and the second sub-period t2 are alternately changed. Since the heating voltage signal U3 changes slowly in the first period T1, the capacitive coupling effect of the heating voltage signal U3 on the signal on the first connection line 40 is weak, and the signal on the first connection line 40 is an active signal, so that the smaller capacitive coupling effect can be quickly recovered, and display abnormality caused by the capacitive coupling effect can be effectively avoided.

It should be noted that, in the present application, whether the first sub-period T1 is the starting period of the first period T1 or the second sub-period T2 is the starting period of the first period T1 is not limited, that is, the first sub-period T1 is the starting period of the first period T1, and at this time, the heating voltage signal U3 is kept unchanged, and then continuously changes to the target voltage signal U (x), where the two steps are alternately performed; alternatively, the second sub-period T2 is a starting period of the first period T1, and the heating voltage signal U3 is continuously changed to the target voltage signal U3 (x) and then is kept unchanged, and the two periods are alternately performed.

It should be noted that, in the second sub-period t2, the heating voltage signal U3 may continuously change to a direction approaching the target voltage signal U3 (x) according to a slope, but the present application is not limited thereto, and the second sub-period t2 may further include a plurality of sub-periods, and the heating voltage signal U3 in each sub-period continuously changes to a direction approaching the target voltage signal U3 (x). The form of the continuous change of the heating voltage signal U3 in each time period may be the same or different, and the change slope of the heating voltage signal U3 in each time period may be the same or different.

It should be noted that, in the present embodiment, the different first sub-periods t1 may be the same or different, and similarly, the different second sub-periods t2 may be the same or different, and the first sub-period t1 and the second sub-period t2, that is, in the present application, the first sub-period t1 and the second sub-period t2 are divided only to distinguish the variation trend of the heating voltage signal, and do not correspond to the time duration.

It should be noted that, the number y of the first sub-period T1 and the second sub-period T2 divided by the first period T1 is not limited, but y is not less than 2, but it is understood that the larger y is, i.e. the more the number of the first sub-period T1 and the second sub-period T2 divided by the first period T1 is, the slower the heating voltage signal U3 changes to the target voltage signal U3 (x), and the weaker the capacitive coupling effect on the signal on the first connection line 40 is. However, considering that the signal on the first connection line 40 is an active signal, the small capacitive coupling effect can be quickly recovered, so y can be properly selected, so that the capacitive coupling effect on the signal on the first connection line 40 is weak, and the heating voltage signal U3 can be quickly changed to the target voltage signal U3 (x), so that the heating trace 30 can quickly heat the display panel 100.

Fig. 13 further shows a schematic diagram of the change of the voltage signal W3 on the first connection line 40 with time when the first voltage terminal 130 receives the hybrid heating voltage signal U3 shown in fig. 12, and as can be seen from comparison with fig. 8, the voltage signal W3 on the first connection line 40 fluctuates less when the first voltage terminal 130 receives the hybrid heating voltage signal U3 shown in fig. 12, and since the signal on the first connection line 40 is an active signal, the smaller capacitive coupling effect can be recovered quickly, so that abnormal display caused by the capacitive coupling effect can be avoided.

Optionally, in one embodiment of the present application, as shown in fig. 6, 9, 10 and 12, the first period T1 corresponds to a start-up period of the heating trace 30, and in the first period T1, the heating voltage signal U is gradually increased from the current voltage signal to the target voltage signal, so that the heating voltage signal U is slowly increased to the target voltage signal during the start-up period of the heating trace 30, thereby reducing a capacitive coupling effect between the heating voltage signal U and the signal on the first connection line 40, and at this time, the target voltage signal is greater than the initial voltage signal.

Optionally, in another embodiment of the present application, the first period T1 corresponds to a closing phase of the heating trace 30, and the heating voltage signal U is gradually reduced from the current voltage signal to the target voltage signal during the first period T1, so that the heating voltage signal U is slowly reduced to the target voltage signal during the closing phase of the heating trace 30, thereby reducing a capacitive coupling effect between the heating voltage signal U and the signal on the first connection line 40, and at this time, the target voltage signal is smaller than the initial voltage signal.

Optionally, in one embodiment of the present application, as shown in fig. 6, 10 and 12, the operation time of the heating voltage signal U further includes a second period T2, and the heating voltage signal U maintains the target voltage signal for the second period T2 after being changed to the target voltage signal over the first period T1.

For example, during the start-up phase of the heating trace 30, after the heating voltage signal U is slowly increased to the target voltage signal, the heating voltage signal U is kept at the target voltage signal for a second period T2, and the display panel 100 is heated for a period of time. After the display panel 100 does not need to be heated, that is, in the closing stage of the heating trace 30, the heating voltage signal U is slowly reduced to the target voltage signal, and then the heating voltage signal U is kept at the target voltage signal in the second period T2, and the heating trace 30 is turned on again until the display panel 100 needs to be heated again.

Alternatively, in one embodiment of the present application, as shown in fig. 14, the display panel 100 further includes a heating control assembly 150, and the heating control assembly 150 is electrically connected to the first voltage terminal 130 for inputting the heating voltage signal U to the first voltage terminal 130.

Optionally, the heating control component 150 includes an analog-to-digital conversion circuit (ADC circuit) or a resistive-inductive series circuit (RL circuit), and may also include other circuit structures that can provide the heating voltage signal provided by any of the above embodiments.

Alternatively, in one embodiment of the present application, as shown in fig. 14, the display area AA has a first side A1 and a second side A2 opposite to each other along the second direction Y, and the first voltage terminal 130 is located at the first side A1 of the display area AA;

The display panel 100 further includes a flexible circuit board 160 positioned at the first side A1 of the display area AA, and the heating control assembly 150 is positioned in the flexible circuit board 160. That is, in the present embodiment, the flexible circuit board 160 is a heating flexible circuit board for supplying a heating voltage signal to the heating trace 30.

Alternatively, in one embodiment of the present application, as shown in fig. 14, the second driving assembly 120 is located at the first side A1 of the display area AA and is electrically connected to the flexible circuit board 160. That is, in the present embodiment, the flexible circuit board 160 is also a display flexible circuit board for providing signals to the second driving assembly 120, and at this time, the display flexible circuit board and the heating flexible circuit board are integrated on one flexible circuit board 160, thereby greatly saving space and simplifying the overall structure of the display panel.

As shown in fig. 14, the first voltage terminal 130 includes a plurality of first pins 131 to be electrically connected with the heating control assembly 150 in the flexible circuit board 160, to receive the heating voltage signal U, and the second voltage terminal 140 includes a plurality of second pins 141. Since the first voltage terminal 130 is a positive voltage terminal and the second voltage terminal 140 is a negative voltage terminal, the heating voltage signal U received by the first voltage terminal 130 actually acts between the first voltage terminal 130 and the second voltage terminal 140, so that the heating trace 30 generates heat under the heating voltage signal to heat the display panel 100.

Alternatively, in another embodiment of the present application, the display flexible circuit board and the heating flexible circuit board may be provided separately.

Alternatively, in one embodiment of the present application, as shown in fig. 1 to 3, 5 and 14, the display area AA has a first side A1 and a second side A2 opposite in the second direction Y, and has a third side A3 and a fourth side A4 opposite in the first direction X;

The display panel 100 includes two first voltage terminals 130 and two second voltage terminals 140, and the two first voltage terminals 130 and the two second voltage terminals 140 are located at a first side A1 of the display area AA;

In the first direction X, the two second voltage terminals 140 are located between the two first voltage terminals 130, and the second driving component 120 is located between the two second voltage terminals 140;

the first driving assembly 110 is located at the third side A3 and/or the fourth side A4 of the display area AA.

Considering that when the heating voltage signal U is provided to the plurality of heating traces 30 through the first heating bus 50 by using one first voltage terminal 130, the power consumed on the first heating bus 50 is greater, and the heating efficiency of the heating trace 30 on the display area AA is lower. Therefore, in the present embodiment, two first voltage terminals 130 are introduced to be electrically connected with the first heating bus 50, and the two first voltage terminals 130 simultaneously provide the heating voltage signal U to the first heating bus 50, which is beneficial to improving the heating driving capability and the heating efficiency. In addition, each heating trace 30 in the display area AA is in a parallel connection relationship, and after two first voltage ends 130 are electrically connected with the first heating buses 50, the two first voltage ends 130 are led in, which is equivalent to a bilateral driving mode, so that the first heating buses 50 electrically connected with the two first voltage ends 130 are also in a parallel connection relationship, and therefore, the total impedance on the first heating buses 50 can be reduced, the power consumed on the first heating buses 50 can be reduced, more effective power can be obtained by the heating trace 30, and the heating efficiency of the heating trace 30 on the display area AA can be improved. Accordingly, in the present embodiment, two second voltage terminals 140 are also introduced.

In this embodiment, the first voltage terminal 130 and the second voltage terminal 140 are disposed on the same side as the second driving component 120, and optionally, the first voltage terminal 130 and the second voltage terminal 140 are disposed on the lower frame of the display panel at the same time, and because the flexible circuit board needs to be disposed at the lower frame to provide signals for the second driving component 120, the flexible circuit board required by the first voltage terminal 130 and the second voltage terminal 140 can be shared with the flexible circuit board that provides signals for the second driving component 120, that is, the display signal and the heating voltage signal share the same flexible circuit board, which is beneficial to simplifying the overall structure of the display panel.

In addition, in the present embodiment, along the first direction X, the two second voltage terminals 140 are located between the two first voltage terminals 130, and the second driving component 120 is located between the two second voltage terminals 140, so that the layout in the display panel is more compact, and the overall structure of the display panel is also facilitated to be simplified.

Optionally, in one embodiment of the present application, as shown in fig. 14, the first heating bus 50 is led out from one first voltage terminal 130, extends around the display area AA to the second side A2 of the display area AA, and extends around the display area AA to the first side A1 of the display area to be electrically connected with the other first voltage terminal 130;

The second heating bus 60 extends along the first direction X at the first side A1 of the display area AA, and is electrically connected to two second voltage terminals 140.

In this embodiment, only the first heating bus 50 is led out from one first voltage terminal 130, extends around the display area AA to the second side A2 of the display area AA, and then extends around the display area AA to the first side A1 of the display area to be electrically connected with the other first voltage terminal 130, so that the first heating bus 50 is electrically connected with each heating trace 30 at the second side A2 of the display area AA, and the second heating bus 60 electrically connected with the second voltage terminal 140 is electrically connected with each heating trace 30 only by extending along the first direction X at the first side A1 of the display area AA, and no winding is required on other sides of the display area AA, thereby being beneficial to simplifying the wiring structure in the display panel.

Based on the same inventive concept, an embodiment of the present application further provides a display device, as shown in fig. 13, where the display device 200 includes the display panel 100 provided in any of the above embodiments. Since the display panel has been described in detail in the foregoing embodiments, the details are not repeated here. The display device may be any electronic apparatus having a display function, such as a touch display screen, a mobile phone, a tablet computer, a notebook computer, an electronic book, or a television.

In summary, the display panel and the display device provided by the embodiments of the present application introduce a plurality of heating traces in the display area, so that the heating traces heat the display panel under the control of the heating voltage signal in the low-temperature environment, and the normal use requirement of the display panel in the low-temperature environment is satisfied. Meanwhile, considering that signal interaction is required between the first driving component and the second driving component through the first connecting wire, and the heating bus for transmitting the heating voltage signal is overlapped with the first connecting wire to generate a capacitive coupling effect, therefore, in the starting stage and/or the closing stage of the heating wiring, the heating voltage signal is gradually changed from the current voltage signal to the target voltage signal, so that the capacitive coupling effect of the heating voltage signal and the signal on the first connecting wire is reduced, and the signal on the first connecting wire is an active signal, the smaller capacitive coupling effect can be quickly recovered, display abnormality caused by the capacitive coupling effect can be effectively avoided, and the display reliability of the display in a low-temperature environment is improved.

In the description, each part is described in a parallel and progressive mode, and each part is mainly described as a difference with other parts, and all parts are identical and similar to each other.

The features described in the various embodiments of the present disclosure may be interchanged or combined with one another in the description to enable those skilled in the art to make or use the application. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A display panel comprising a display region and a non-display region at least partially surrounding the display region;

The non-display area is provided with a first driving component electrically connected with the first signal line, a second driving component electrically connected with the second signal line, and a first voltage end and a second voltage end which are electrically connected with the heating wiring, the first driving component and the second driving component are electrically connected through a first connecting line, and the heating wiring is electrically connected with the first voltage end through a first heating bus and is electrically connected with the second voltage end through a second heating bus;

The first connection line overlaps the first heating bus line in a direction perpendicular to a plane in which the display panel is located, and/or the first connection line overlaps the second heating bus line;

the first voltage terminal receives a heating voltage signal, the working time of the heating voltage signal comprises a first time period, the first time period corresponds to a starting stage or a closing stage of the heating wire, and the heating voltage signal is gradually changed from a current voltage signal to a target voltage signal in the first time period;

the first time period comprises n first sub-time periods which are sequentially arranged, the heating voltage signal in the (k+1) th first sub-time period is closer to the target voltage signal than the heating voltage signal in the (k) th first sub-time period, the heating voltage signal in any one of the first sub-time periods is unchanged, wherein k is more than or equal to 1 and less than or equal to n-1, and k and n are integers;

or the first time period comprises m second sub-time periods which are sequentially arranged, and the heating voltage signal in any one of the second sub-time periods continuously changes to a direction approaching to the target voltage signal;

Or the first time period comprises a first sub-time period and a second sub-time period which are alternately arranged, the heating voltage signal in any one of the first sub-time periods is unchanged, and the heating voltage signal in any one of the second sub-time periods is continuously changed to a direction approaching to the target voltage signal.

2. The display panel according to claim 1, wherein the first period includes m second sub-periods arranged in sequence, and a heating voltage signal in any one of the second sub-periods continuously changes in a direction approaching the target voltage signal;

and the heating voltage signal corresponding to the tail end of the j-th second sub-time period is equal to the heating voltage signal corresponding to the start end of the j+1th second sub-time period, wherein j is more than or equal to 1 and less than or equal to m-1, and j and m are integers.

3. The display panel according to claim 1, wherein the first period includes m second sub-periods arranged in sequence, and a heating voltage signal in any one of the second sub-periods continuously changes in a direction approaching the target voltage signal;

The heating voltage signal in each second sub-time period continuously changes in a diagonal direction to a direction approaching the target voltage signal.

4. The display panel of claim 1, wherein the first period of time corresponds to a start-up phase of the heating trace, and wherein the heating voltage signal gradually increases from a current voltage signal to a target voltage signal during the first period of time.

5. The display panel of claim 1, wherein the first period corresponds to a turn-off phase of the heating trace, and wherein the heating voltage signal gradually decreases from a current voltage signal to a target voltage signal during the first period.

6. The display panel of claim 1, wherein the on-time of the heating voltage signal further comprises a second time period, the heating voltage signal maintaining the target voltage signal for the second time period after being changed to the target voltage signal over the first time period.

7. The display panel of claim 1, further comprising a heating control assembly electrically connected to the first voltage terminal for inputting the heating voltage signal thereto.

8. The display panel of claim 7, wherein the heating control assembly comprises an analog-to-digital conversion circuit or a resistive-inductive series circuit.

9. The display panel of claim 7, wherein the display area has first and second sides opposite along the second direction, the first voltage terminal being located on the first side of the display area;

The display panel further includes a flexible circuit board positioned on a first side of the display area, and the heating control assembly is positioned in the flexible circuit board.

10. The display panel of claim 9, wherein the second driving assembly is located on a first side of the display area and is electrically connected to the flexible circuit board.

11. The display panel of claim 1, wherein the display area has first and second sides opposite in the second direction and has third and fourth sides opposite in the first direction;

The display panel comprises two first voltage ends and two second voltage ends, and the two first voltage ends and the two second voltage ends are positioned on a first side of the display area;

Along the first direction, the two second voltage ends are positioned between the two first voltage ends, and the second driving component is positioned between the two second voltage ends;

The first driving assembly is located at the third side and/or the fourth side of the display area.

12. The display panel of claim 11, wherein the first heating bus is led from one of the first voltage terminals, extends around the display area to the second side of the display area, and extends around the display area to the first side of the display area to electrically connect with the other of the first voltage terminals;

the second heating bus extends along the first direction at the first side of the display area and is electrically connected to two second voltage ends.

13. A display device comprising the display panel of any one of claims 1-12.