CN113393793A

CN113393793A - Display panel, voltage regulating circuit and method and display device

Info

Publication number: CN113393793A
Application number: CN202110650249.7A
Authority: CN
Inventors: 陈心全
Original assignee: Kunshan Govisionox Optoelectronics Co Ltd
Current assignee: Kunshan Govisionox Optoelectronics Co Ltd
Priority date: 2021-05-19
Filing date: 2021-06-10
Publication date: 2021-09-14
Anticipated expiration: 2041-06-10
Also published as: CN113393793B

Abstract

The application discloses a display panel, a voltage regulating circuit and method and a display device. The display panel includes first display area and second display area, and first display area is provided with first power cord, and the second display area is provided with the second power cord, and display panel includes: the first power supply module is electrically connected with the first power line; the second power supply module is electrically connected with a second power line; the voltage detection module is used for detecting the voltage value of a boundary point of at least one of a first power line and a second power line, the boundary point of the first power line is adjacent to the second display area, and the boundary point of the second power line is adjacent to the first display area; and the control module is used for adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the voltage value detected by the voltage detection module. According to the embodiment of the application, the problem that an obvious boundary exists between the camera display area and the non-camera display area can be solved.

Description

Display panel, voltage regulating circuit and method and display device

Cross Reference to Related Applications

The present application claims priority to chinese patent application No. 202110547093.X entitled "display panel and display device" filed on 19/05/2021, the entire contents of which are incorporated herein by reference.

Technical Field

The application relates to the technical field of display, in particular to a display panel, a voltage regulating circuit for the display panel, a voltage regulating method for the display panel and a display device.

Background

With the rapid development of electronic devices, the requirements of users on screen occupation ratio are higher and higher, so that the comprehensive screen display of the electronic devices is concerned more and more in the industry.

The design of the camera under the screen appears at present, and the camera under the screen is located below the display screen and does not influence the display function of the display screen. In order to improve the light transmittance of the camera display area, the structure of the camera display area is different from that of the non-camera display area, so that a clear boundary line exists between the two display areas during display.

Disclosure of Invention

The embodiment of the application provides a display panel, a voltage regulating circuit and method and a display device, which are used for solving the problem that an obvious boundary exists between a camera display area and a non-camera display area.

In a first aspect, an embodiment of the present application provides a display panel, where the display panel includes a first display area and a second display area, the first display area is provided with a first power line, the second display area is provided with a second power line, and the display panel includes: the first power supply module is electrically connected with the first power line; the second power supply module is electrically connected with a second power line; the voltage detection module is used for detecting the voltage value of a boundary point of at least one of a first power line and a second power line, the boundary point of the first power line is adjacent to the second display area, and the boundary point of the second power line is adjacent to the first display area; and the control module is used for adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the voltage value detected by the voltage detection module.

In a possible implementation of the first aspect, the voltage detection module includes at least one of a first transistor and a second transistor;

the first electrode of the first transistor is electrically connected with the boundary point of the first power line, the second electrode of the first transistor is electrically connected with the control module, and the grid electrode of the first transistor is electrically connected with the first control signal end;

the first pole of the second transistor is electrically connected with the boundary point of the second power line, the second pole of the second transistor is electrically connected with the control module, and the grid of the second transistor is electrically connected with the second control signal end.

In a possible implementation manner of the first aspect, the first control signal terminal and/or the second control signal terminal is/are disposed on the control module.

In a possible implementation manner of the first aspect, the first power line is electrically connected to the first power supply module through the first connection line, the second power line is electrically connected to the second power supply module through the second connection line, the second pole of the first transistor is electrically connected to the first control signal terminal through the second connection line, and/or the second pole of the second transistor is electrically connected to the second control signal terminal through the first connection line;

the voltage detection module is specifically configured to: the voltage value is detected in a blanking interval of the display panel.

In a possible implementation manner of the first aspect, the voltage detection module is configured to detect a voltage value of a boundary point of the first power line and the second power line, and the control module is specifically configured to:

calculating a first difference value between the voltage value of the boundary point of the first power line and the voltage value of the boundary point of the second power line, which are detected by the voltage detection module;

and adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the comparison result of the first difference and the first preset difference.

In a possible implementation manner of the first aspect, an area of the first display area is smaller than an area of the second display area, the voltage detection module is configured to detect a voltage value of a boundary point of the second power line, and the control module is specifically configured to:

calculating a second difference value between the voltage value provided by the first power supply module and the voltage value of the boundary point of the second power line detected by the voltage detection module;

and adjusting the voltage value of the first power supply module or the data voltage of the first display area according to the comparison result of the second difference value and the second preset difference value.

In a possible implementation manner of the first aspect, the display panel further includes a storage module, where the storage module is configured to store a lookup table of first preset difference values, and the lookup table includes a plurality of preset gray scales and a plurality of first preset difference values corresponding to the preset gray scales one to one.

In a possible implementation manner of the first aspect, the display panel further includes a storage module, where the storage module is configured to store a lookup table of second preset difference values, and the lookup table includes a plurality of preset gray scales and a plurality of second preset difference values corresponding to the plurality of preset gray scales one to one.

In a possible implementation manner of the first aspect, the first display area includes a first sub-area adjacent to the second display area, the second display area includes a second sub-area adjacent to the first display area, and the display panel further includes a determining module;

the judging module is used for judging whether the first sub-area and the second sub-area display the same picture, and the same picture comprises a white picture and a pure color picture;

if the first sub-area and the second sub-area display the same picture, the voltage detection module starts to detect the voltage value, and if the first sub-area and the second sub-area display different pictures, the voltage detection module stops detecting the voltage value.

In a second aspect, an embodiment of the present application provides a voltage regulating circuit for a display panel, where the display panel includes a first display area and a second display area, the first display area is provided with a first power line, the second display area is provided with a second power line, and the voltage regulating circuit includes:

the first power supply module is electrically connected with the first power line;

the second power supply module is electrically connected with a second power line;

the voltage detection module is used for detecting the voltage value of a boundary point of at least one of a first power line and a second power line, the boundary point of the first power line is adjacent to the second display area, and the boundary point of the second power line is adjacent to the first display area;

and the control module is used for adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the voltage value detected by the voltage detection module.

In a third aspect, an embodiment of the present application provides a voltage adjustment method for a display panel, where the display panel includes a first display area and a second display area, the first display area is provided with a first power line, and the second display area is provided with a second power line, the method includes the following steps:

detecting a voltage value of a boundary point of at least one of a first power line and a second power line, wherein the boundary point of the first power line is adjacent to a second display area of the display panel, and the boundary point of the second power line is adjacent to a first display area of the display panel;

and adjusting at least one of a voltage value of a first power supply module electrically connected with the first power line, a voltage value of a second power supply module electrically connected with the second power line, a data voltage of the first display area and a data voltage of the second display area according to the detected voltage value.

In a fourth aspect, an embodiment of the present application provides a display device, including the display panel as in the embodiment of the first aspect.

According to the display panel, the voltage regulating circuit and method and the display device provided by the embodiment of the application, on one hand, the first display area and the second display area respectively use independent power supply modules, and the voltages on the power lines of the first display area and the second display area are mutually independent, so that the problem of integral power consumption increase caused by the fact that the first display area and the second display area share the same power supply module can be solved; on the other hand, the voltage detection module is used for detecting the voltage value of the boundary point of at least one of the first power line and the second power line, and the control module is used for adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the voltage value detected by the voltage detection module, so that the brightness of the first display area and/or the second display area can be adjusted, and the boundary line existing between the first display area and the second display area is improved.

Drawings

Other features, objects, and advantages of the present application will become apparent from the following detailed description of non-limiting embodiments thereof, when read in conjunction with the accompanying drawings, in which like reference characters designate the same or similar parts throughout the figures thereof, and which are not to scale.

Fig. 1 to 3 are schematic structural diagrams of a display panel according to some embodiments of the present disclosure;

FIG. 4 is an equivalent schematic diagram of a display panel provided in an embodiment of the present application;

FIG. 5 is an equivalent schematic diagram of a display panel provided in another embodiment of the present application;

fig. 6 is a schematic structural diagram of a display panel according to still another embodiment of the present application;

FIG. 7 illustrates a waveform diagram of a tear signal provided by one embodiment of the present application;

fig. 8 is a schematic structural diagram of a display panel according to another embodiment of the present application;

fig. 9 is a schematic structural diagram of a display panel according to still another embodiment of the present application;

FIG. 10 is a flowchart illustrating a voltage adjustment method for a display panel according to an embodiment of the present disclosure;

fig. 11 is a schematic structural diagram of a display device according to an embodiment of the present application.

Detailed Description

Features and exemplary embodiments of various aspects of the present application will be described in detail below, and in order to make objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present application and are not intended to limit the present application. It will be apparent to one skilled in the art that the present application may be practiced without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present application by illustrating examples thereof.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

In the related design of the off-screen camera, in order to save the number of power supply modules, the power line of the sub display region (also referred to as the camera display region) and the power line of the main display region (also referred to as the non-camera display region) may be connected to the same power supply module, that is, the power line of the sub display region and the power line of the main display region may be connected to each other, for example, the positive voltage power line (ELVDD power line) of the sub display region and the positive voltage power line of the main display region are connected to each other and to the same power supply module, and the negative voltage power line (ELVSS power line) of the sub display region and the negative voltage power line of the main display region are connected to each other and to the same power supply module, but the applicant found that, although the number of power supply modules can be saved, the above manner may result in an increase in the positive and negative cross-voltages of the main display region, and thus in the overall power consumption of the display panel, it is also difficult to overcome the borderline existing between the main and sub display areas.

The present invention provides a display panel and a display device, which can be presented in various forms, and some examples of which will be described below with reference to the accompanying drawings.

As shown in fig. 1, the display panel 100 includes a first display area AA1 and a second display area AA 2. Illustratively, the light transmittance of the first display region AA1 may be greater than that of the second display region AA 2. A light sensing element, which may be, for example, a camera, may be disposed corresponding to the first display area AA 1. Specifically, the pixel density (Pixels Per inc, PPI) of the first display region AA1 may be set to be less than the pixel density of the second display region AA2, such that the light transmittance of the first display region AA1 is greater than the light transmittance of the second display region AA 2.

The first display area AA1 is provided with a first power line 11, and the second display area AA2 is provided with a second power line 12. The display panel 100 may include a first power supply module 21, a second power supply module 22, a voltage detection module 30, and a control module 40.

The display panel 100 may further include a non-display area NA, and the first power module 21, the second power module 22, the voltage detection module 30 and the control module 40 may be disposed in the non-display area NA.

The first power line 11 is connected to the first power supply module 21. The second power line 12 is connected to a second power supply module 22. The first power supply module 21 may be provided with a power supply terminal, and the first power line 11 is connected to the power supply terminal of the first power supply module 21. The second power supply module 22 may also be provided with a power supply terminal, and the second power line 12 is connected to the power supply terminal of the second power supply module 22.

Illustratively, the first power supply module 21 and the second power supply module 22 may be two power supply chips (power ICs).

Illustratively, the display panel 100 may support an on-screen display mode (AOD), the display panel includes an AOD power supply module, and the first power supply module 11 may be the AOD power supply module.

Illustratively, the first power line 11 and the second power line 12 may be positive voltage power lines (ELVDD power lines), that is, the first display area AA1 and the second display area AA2 respectively use different ELVDD power supplying blocks. In addition, the first display area AA1 and the second display area AA2 may use different ELVSS power supply modules, respectively.

It is understood that the first power line 11 is electrically connected to the pixel circuits within the first display area AA1 to supply a power voltage to the pixel circuits within the first display area AA 1. The second power line 12 is electrically connected to the pixel circuits in the second display area AA2 to supply a power voltage to the pixel circuits in the second display area AA 2.

For example, as shown in fig. 1, the first power line 11 may have a grid shape, and the second power line 12 may also have a grid shape, so as to reduce a voltage drop (IR drop) of the first power line 11 and the second power line 12.

Of course, the first power lines 11 may also extend along the column direction Y and be spaced apart in the row direction X, and the second power lines 12 may also extend along the column direction Y and be spaced apart in the row direction X, and the specific arrangement of the first power lines 11 and the second power lines 12 is not limited in this application.

The boundary point C1 of the first power line 11 is adjacent to the second display area AA2, and the boundary point C2 of the second power line 12 is adjacent to the first display area AA 1. It is understood that the boundary point C1 is located on the first power line 11, and the boundary point C2 is located on the second power line 12. The voltage detection module 30 is configured to detect a voltage value of a boundary point of at least one of the first power line 11 and the second power line 12. For example, the voltage detection module 30 may be configured to detect a voltage value at a boundary point C1 of the first power line 11, or the voltage detection module 30 may be configured to detect a voltage value at a boundary point C2 of the second power line 12, or the voltage detection module 30 may be configured to detect a voltage value at a boundary point C1 of the first power line 11 and a voltage value at a boundary point C2 of the second power line 12.

Illustratively, the first boundary point C1 and the second boundary point C2 may be adjacent. For example, as shown in fig. 1, the first boundary point C1 is adjacent to the second boundary point C2 and a line connecting the first boundary point C1 and the second boundary point C2 extends in the column direction Y. For another example, as shown in fig. 2 or fig. 3, the first boundary point C1 is adjacent to the second boundary point C2, and a connection line between the first boundary point C1 and the second boundary point C2 extends in the row direction X.

The brightness of the pixel is positively correlated with the pixel currentThe pixel current I ═ K (ELVDD-Vdata)²For example, where K is constant, ELVDD is a power voltage, and Vdata is a data voltage, it can be seen that the luminance of a pixel is related to the power voltage and the data voltage. Under the condition that the data voltage Vdata is not changed, the larger the power supply voltage ELVDD is, the larger the current is, the larger the brightness is, the smaller the power supply voltage ELVDD is, and the smaller the current is, the smaller the brightness is; under the condition that the power supply voltage ELVDD is not changed, the smaller the data voltage Vdata, the larger the current, the larger the brightness, and the larger the data voltage Vdata, the smaller the current, the smaller the brightness. The control module 40 may be configured to adjust at least one of a voltage value of the first power supply module 21, a voltage value of the second power supply module 22, a data voltage of the first display area AA1, and a data voltage of the second display area AA2 according to the voltage value detected by the voltage detection module 30.

For example, if the voltage detection module 30 detects only the voltage at the boundary point C2 of the second power line 12, the voltage at the boundary point C2 of the second power line 12 may be compared with the voltage of the first power supply module 21, and if the voltage at the boundary point C2 of the second power line 12 is higher, the second display area AA2 may be brighter than the first display area AA1, so that the brightness of the first display area AA1 may be increased or the brightness of the second display area AA2 may be decreased. For example, the voltage value of the first power supply module 21 may be increased, so that the voltage value of the first power line 11 is increased, thereby increasing the brightness of the first display area AA1, so that the brightness of the second display area AA2 and the first display area AA1 tend to be consistent; for another example, the data voltage of the first display area AA1 may be decreased, so that the brightness of the first display area AA1 is increased; for another example, the voltage value of the second power supply module 22 may be decreased such that the voltage value of the second power line 12 is decreased to decrease the brightness of the second display area AA2, or the data voltage of the second display area AA2 may be increased to decrease the brightness of the second display area AA 2.

In the embodiment of the application, on one hand, since the first display area AA1 and the second display area AA2 respectively use independent power supply modules, and voltages on power lines of the first display area AA1 and the second display area AA2 are independent from each other, the problem of increase in overall power consumption caused by sharing the same power supply module in the first display area AA1 and the second display area AA2 can be avoided; on the other hand, the voltage detection module 30 is configured to detect a voltage value of a boundary point of at least one of the first power line 11 and the second power line 12, and the control module 40 is configured to adjust at least one of the voltage value of the first power supply module 21, the voltage value of the second power supply module 22, the data voltage of the first display area AA1, and the data voltage of the second display area AA2 according to the voltage value detected by the voltage detection module 30, so as to adjust the brightness of the first display area AA1 and/or the second display area AA2, thereby improving a boundary line existing between the first display area AA1 and the second display area AA 2.

In some alternative embodiments, the voltage detection module 30 may include at least one of the first transistor T1 and the second transistor T2.

Illustratively, the area of the second display area AA2 is smaller than the area of the first display area AA 1. Since the area of the second display area AA2 is small, the voltage drop of the second power line 12 is negligible, that is, the voltage value at each position of the second power line 12 (including the boundary point C2) can be considered to be equal to the voltage value provided by the second power supply module 22. In this case, the voltage detection module 30 may be used to detect only the voltage value of the boundary point C1 of the first power line 11, and further, the control module may compare the detected voltage value of the boundary point C1 of the first power line 11 with the voltage value provided by the second power supply module 22, and the voltage value provided by the second power supply module 22 may be directly obtained and is not required to be detected any more.

For example, in the case where the voltage detection module 30 is used to detect the voltage value of the boundary point C1 of the first power line 11, as shown in fig. 4, the voltage detection module 30 may include a first transistor T1. A first pole of the first transistor T1 is electrically connected to the boundary point C1 of the first power line 11, a second pole of the first transistor T1 is electrically connected to the control module 40, and a gate of the first transistor T1 is electrically connected to the first control signal terminal SW 1. The first transistor T1 is turned on and off under the control of the first control signal terminal SW 1. For example, the first transistor T1 is a P-type transistor, when the first control signal terminal SW1 outputs a low level signal, the first transistor T1 is turned on, and the first transistor T1 transmits the voltage value at the boundary point C1 of the first power line 11 to the control module 40.

Illustratively, the area of the first display area AA1 is smaller than the area of the second display area AA 2. Since the area of the first display area AA1 is small, the voltage drop of the first power line 11 is negligible, that is, the voltage value at each position of the first power line 11 (including the boundary point C1) can be considered to be equal to the voltage value provided by the first power supply module 21. In this case, the voltage detection module 30 may be used to detect the voltage value of the boundary point C2 of the second power line 12 only, and further, the control module may compare the detected voltage value of the boundary point C2 of the second power line 12 with the voltage value provided by the first power supply module 21, and the voltage value provided by the first power supply module 21 may also be directly obtained and is not required to be detected any more.

For example, in the case where the voltage detection module 30 is used to detect the voltage value of the boundary point C2 of the second power line 12, as shown in fig. 5, the voltage detection module 30 may include a second transistor T2. A first pole of the second transistor T2 is electrically connected to the boundary point C2 of the second power line 12, a second pole of the second transistor T2 is electrically connected to the control module 40, and a gate of the second transistor T2 is electrically connected to the second control signal terminal SW 2. The second transistor T2 is turned on and off under the control of the second control signal terminal SW 2. For example, the second transistor T2 is a P-type transistor, when the second control signal terminal SW2 outputs a low level signal, the second transistor T2 is turned on, and the second transistor T2 transmits the voltage value at the boundary point C2 of the second power line 12 to the control module 40.

Of course, in the case that the voltage detection module 30 is used for detecting the voltage value of the boundary point C1 of the first power line 11 and the voltage value of the boundary point C2 of the second power line 12, as shown in fig. 6, the voltage detection module 30 may include the first transistor T1 and the second transistor T2 at the same time, and the connection manner of the first transistor T1 and the second transistor T2 may be as described above, and will not be described again. For example, the first transistor T1 and the second transistor T2 are both P-type transistors, when the first control signal terminal SW1 outputs a low level signal, the first transistor T1 is turned on, and the first transistor T1 transmits the voltage value of the boundary point C1 of the first power line 11 to the control module 40; when the second control signal terminal SW2 outputs a low level signal, the second transistor T2 is turned on, and the second transistor T2 transmits the voltage value of the boundary point C2 of the second power line 12 to the control module 40.

For example, at the same time, the states of the first and second transistors T1 and T2 may be the same. For example, when the first transistor T1 is turned on, the second transistor T2 is also turned on, and when the first transistor T1 is turned off, the second transistor T2 is also turned off.

For example, in the case that the voltage value of the boundary point C1 and/or the boundary point C2 needs to be detected every frame, the first transistor T1 and/or the second transistor T2 may be controlled to be turned on once every frame, so that the voltage detection module 30 may detect the voltage value once every frame. Of course, if it is only necessary to detect the voltage value of the boundary point C1 and/or the boundary point C2 at a specific frame, the first transistor T1 and/or the second transistor T2 may be controlled to be turned on once at the specific frame, and the first transistor T1 and/or the second transistor T2 may be controlled to maintain an off state at other frames than the specific frame.

For example, the first transistor T1 and/or the second transistor T2 may be formed at the same time as transistors in the pixel circuit of the display panel 100.

For example, the voltage value detected by the voltage detecting module 30 is an analog signal, and the control module 40 may convert the analog signal into a digital signal, so as to conveniently determine the magnitude of the detected voltage value.

In the embodiment of the present application, only the first transistor T1 and/or the second transistor T2 are/is needed to be disposed, so as to detect the voltage value of the boundary point of the first power line 11 and/or the second power line 12, which is simple, convenient and easy to implement, and the manufacturing process of the display panel 100 is not increased even when the first transistor T1 and/or the second transistor T2 are formed simultaneously with the transistors in the pixel circuit of the display panel 100.

In some alternative embodiments, as shown in FIG. 6, the first control signal terminal SW1 and/or the second control signal terminal SW2 may be disposed at the control module 40. That is, the control module 40 may be directly utilized to provide the control signal for the first transistor T1 and/or the second transistor T2.

In the embodiment of the present application, the first control signal terminal SW1 and/or the second control signal terminal SW2 are disposed on the control module 40, so as to simplify the structure of the display panel.

Of course, the first control signal terminal SW1 and/or the second control signal terminal SW2 may be independent of the control module 40. Here, the independence can be understood as a physical structural independence, for example, in the physical structure, the first control signal terminal SW1 and/or the second control signal terminal SW2 may be located at a different position of the display panel from the control module 40, although the first control signal terminal SW1 and/or the second control signal terminal SW2 may be physically independent from the control module 40, the first control signal terminal SW1 and/or the second control signal terminal SW2 may still receive an indication signal sent by the control module 40, and the first control signal terminal SW1 and/or the second control signal terminal SW2 sends a signal for controlling the first transistor T1 and/or the second transistor T2 to be turned on or off under the indication signal.

In some alternative embodiments, as shown in fig. 6, the first power line 11 is electrically connected to the first power supply module 21 through a first connection line 51, and the second power line 12 is electrically connected to the second power supply module 22 through a second connection line 52. The first connection line 51 may be multiplexed as a signal path between the second pole of the second transistor T2 and the second control signal terminal SW2, and in particular, the second pole of the second transistor T2 may be electrically connected to the second control signal terminal SW2 through the first connection line 51. And/or, the second connection line 52 may be multiplexed as a signal path between the second pole of the first transistor T1 and the first control signal terminal SW1, and in particular, the second pole of the first transistor T1 may be electrically connected to the first control signal terminal SW1 through the second connection line.

The first connection lines 51 and/or the second connection lines 52 are multiplexed, so that the number of connection lines can be reduced, and the structure of the display panel can be simplified.

In addition, since the first connection line 51 and/or the second connection line 52 are multiplexed, in order to prevent crosstalk of signals on the first connection line 51 and/or the second connection line 52, the voltage detection module 30 may specifically be configured to: the voltage value is detected in a blanking interval of the display panel.

For example, the display panel may send a tearing TE signal every frame, and the driving module of the display panel waits until the tearing TE signal is received before the flashing. The blanking interval of the display panel may be an active level interval of the TE signal of the display panel. As shown in fig. 7, the active level of the tear TE signal is a high level, the inactive level of the tear TE signal is a low level, and the high level period shown in fig. 7 may be a blank interval of the display panel.

It is understood that the first power supplying module 21 and/or the second power supplying module 22 stops supplying power during a blank interval of the display panel (which may be understood as during an active level period of a tearing TE signal of the display panel). The first and second

power supplying modules

21 and 22 maintain power supply during a non-blanking interval of the display panel (which may be understood as during an inactive level period of a tearing TE signal of the display panel).

For example, the first transistor T1 may be in a turned-on state during an active level period of a tear TE signal of the display panel, when a voltage signal of the boundary point C1 of the first power line 11 is transmitted on the second connection line 52. The first transistor T1 may be in a turned-off state during an inactive level period of the tearing TE signal of the display panel when the voltage signal provided by the second power supply module 22 is transmitted on the second connection line 52.

For example, the second transistor T2 may be in a turned-on state during an active level period of a tear TE signal of the display panel when a voltage signal of a boundary point C2 of the second power line 12 is transmitted on the first connection line 51. The second transistor T2 may be in a turned-off state during an inactive level period of the tearing TE signal of the display panel when the voltage signal provided by the first power supply module 21 is transmitted on the first connection line 51.

In some alternative embodiments, as shown in fig. 8, the first display area AA1 includes a first sub-area a1 adjacent to the second display area AA2, and the second display area AA2 includes a second sub-area a2 adjacent to the first display area AA 1. If the first sub-area a1 and the second sub-area a2 display the same image, the voltage detecting module 30 starts detecting the voltage value, and if the first sub-area a1 and the second sub-area a2 display different images, the voltage detecting module 30 stops detecting the voltage value.

When the first sub-area a1 and the second sub-area a2 display different pictures, the normal display situation of the first display area AA1 and the second display area AA2 is that there is a boundary therebetween, so that when the first sub-area a1 and the second sub-area a2 display different pictures, the detection function of the voltage detection module 30 and the control function of the control module 40 do not need to be activated. When the first sub-area a1 and the second sub-area a2 display the same screen, if there is a distinct boundary between the first display area AA1 and the second display area AA2, it is a display abnormality, and it is necessary to activate the detection function of the voltage detection module 30 and the control function of the control module 40. According to the embodiment of the application, the display brightness of the display panel can be more effectively adjusted. Illustratively, the display panel 100 may further include a determination module 60. The determining module 60 is used for determining whether the first sub-area a1 and the second sub-area a2 display the same picture. The same picture may include a solid color picture and a white picture. For example, if the first sub-area a1 and the second sub-area a2 both display white images at the same gray scale, or the first sub-area a1 and the second sub-area a2 both display pure color images at the same gray scale, the determination result of the determining module 60 is that the first sub-area a1 and the second sub-area a2 display the same images. If the first sub-area a1 and the second sub-area a2 respectively display a white image and a pure color image, or the first sub-area a1 and the second sub-area a2 respectively display white images with different gray scales, the determination result of the determining module 60 is that the first sub-area a1 and the second sub-area a2 display different images.

For example, the determining module 60 may be configured to send the determination result to the control module 40, if the determination result is yes, the control module 40 may send a signal indicating that the first transistor T1 and/or the second transistor T2 are turned on to the first control signal terminal SW1 and/or the second control signal terminal SW2, and the first control signal terminal SW1 and/or the second control signal terminal SW2 send a level for controlling the first transistor T1 and/or the second transistor T2 to be turned on under the indication signal, it is understood that the first transistor T1 and/or the second transistor T2 may detect a voltage value and feed back the detected voltage value to the control module 40 when the first transistor T1 and/or the second transistor T2 are turned on. If the determination result is negative, the control module 40 may send a signal indicating that the first transistor T1 and/or the second transistor T2 are turned off to the first control signal terminal SW1 and/or the second control signal terminal SW2, and the first control signal terminal SW1 and/or the second control signal terminal SW2 send a level for controlling the first transistor T1 and/or the second transistor T2 to be turned off under the indication signal, it is understood that the first transistor T1 and/or the second transistor T2 cannot detect the voltage value under the condition that the first transistor T1 and/or the second transistor T2 are turned off, and the control module 40 may not receive the fed-back voltage value.

For example, the determining module 60 may be configured to determine whether the first sub-area a1 and the second sub-area a2 display the same picture each time. For example, if the determination result of the first frame is yes, the determination module 60 sends the determination result to the control module 40, and the control module 40 may send a signal indicating that the first transistor T1 and/or the second transistor T2 are turned on to the first control signal terminal SW1 and/or the second control signal terminal SW2, and the first control signal terminal SW1 and/or the second control signal terminal SW2 send a level for controlling the first transistor T1 and/or the second transistor T2 to be turned on under the indication signal, and the voltage detection module 30 starts to detect the voltage value. For example, if the determination result of the second frame is negative, the determination module 60 sends the determination result to the control module 40, and the control module 40 may send a signal indicating that the first transistor T1 and/or the second transistor T2 are turned off to the first control signal terminal SW1 and/or the second control signal terminal SW2, and the first control signal terminal SW1 and/or the second control signal terminal SW2 send a level for controlling the first transistor T1 and/or the second transistor T2 to be turned off under the indication signal, and the voltage detection module 30 stops detecting the voltage value.

For example, the determining module 60 may obtain a picture to be displayed, and determine whether the first sub-area a1 and the second sub-area a2 display the same picture according to the gray scale of the picture to be displayed.

In some alternative embodiments, the voltage detection module 30 is configured to detect a voltage value of a boundary point C1 of the first power line 11 and a voltage value of a boundary point C2 of the second power line 12. The control module 40 may specifically be configured to: calculating a first difference value between the voltage value of the boundary point C1 of the first power line 11 and the voltage value of the boundary point C2 of the second power line 12 detected by the voltage detection module 30; according to the comparison result between the first difference and the first preset difference, at least one of the voltage value of the first power supply module 21, the voltage value of the second power supply module 22, the data voltage of the first display area AA1, and the data voltage of the second display area AA2 is adjusted.

For example, the first preset difference may be a difference between a voltage value of the boundary point C1 of the first power line 11 and a voltage value of the boundary point C2 of the second power line 12 without a distinct boundary between the first display area AA1 and the second display area AA 2. Alternatively, the first preset difference value may be set empirically.

For example, if the first difference is smaller than the first preset difference, it may be determined that the voltage value of the boundary point C1 of the first power line 11 is smaller, and according to the current formula, the brightness of the first display area AA1 is lower, and therefore, the brightness of the first display area AA1 may be adjusted toward increasing or decreasing the brightness of the second display area AA 2. If the first difference is equal to the first preset difference, it may not be necessary to adjust the brightness of the first display area AA1 and/or the second display area AA 2. If the first difference is greater than the first predetermined difference, it is determined that the voltage value of the boundary point C1 of the first power line 11 is larger, and the brightness of the first display area AA1 is brighter according to the current formula, so that the brightness of the first display area AA1 can be adjusted toward decreasing or increasing the brightness of the second display area AA 2.

In some alternative embodiments, since the current drops (IR drop is different) on the first power line 11 and the second power line 12 for different gray-scale frames, the difference between the voltage value of the boundary point C1 of the first power line 11 and the voltage value of the boundary point C2 of the second power line 12 may be different under different gray scales without a distinct boundary between the first display area AA1 and the second display area AA2, that is, the first predetermined difference may be different under different gray scales.

For example, the first display area AA1 and the second display area AA2 both display 50 gray-scale images, and when there is no distinct boundary between the first display area AA1 and the second display area AA2, the difference between the voltage value of the boundary point C1 of the first power line 11 and the voltage value of the boundary point C2 of the second power line 12 is 0.2V, and the first predetermined difference corresponding to 50 gray-scale images may be 0.2V. The first display area AA1 and the second display area AA2 both display 100 gray-scale images, and when there is no obvious boundary between the first display area AA1 and the second display area AA2, the difference between the voltage value of the boundary point C1 of the first power line 11 and the voltage value of the boundary point C2 of the second power line 12 is 0.25V, and the first predetermined difference corresponding to 100 gray-scale images may be 0.25V. The above numerical values are merely examples and are not intended to limit the present application.

In some optional embodiments, as shown in fig. 8, the display panel 100 further includes a storage module 70, where the storage module 70 is configured to store a lookup table of first preset difference values, and the lookup table includes a plurality of preset grayscales and a plurality of first preset difference values corresponding to the preset grayscales one to one.

For example, the lookup table of the first preset difference value may be as shown in table 1.

TABLE 1

Table 1 is merely an example and is not intended to limit the present application.

According to the embodiment of the application, the processing efficiency of the control module can be improved through the prestored lookup table.

In some alternative embodiments, as shown in fig. 8, the area of the first display area AA1 is smaller than the area of the second display area AA 2. Since the area of the first display area AA1 is small, the voltage drop of the first power line 11 is negligible, that is, the voltage value at each position of the first power line AA1 (including the boundary point C1) can be regarded as equal to the voltage value provided by the first power supply module 21. In this case, it is not necessary to detect the voltage value of the boundary point C1 of the first power line AA1, and since the area of the first display area AA1 is small, the luminance thereof is relatively easily adjusted, and thus only the voltage value of the first power supply module or the data voltage of the first display area may be adjusted. The voltage detection module 30 can be used to detect the voltage value of the boundary point C2 of the second power line 12. The control module 40 is specifically configured to: and calculating a second difference value between the voltage value provided by the first power supply module and the voltage value of the boundary point of the second power line detected by the voltage detection module, and adjusting the voltage value of the first power supply module or the data voltage of the first display area according to a comparison result of the second difference value and a second preset difference value.

For example, the second preset difference may be a difference between the voltage value provided by the first power supply module 21 and the voltage value of the boundary point C2 of the second power line 12 without a distinct boundary between the first display area AA1 and the second display area AA 2. Alternatively, the second preset difference value may be set empirically.

For example, if the second difference is smaller than the second preset difference, it may be determined that the voltage value of the boundary point C1 of the first power line 11 is smaller, and the brightness of the first display area AA1 is lower according to the current formula, so that the brightness of the first display area AA1 may be increased or the brightness of the second display area AA2 may be decreased. If the second difference is equal to the second predetermined difference, it may not be necessary to adjust the brightness of the first display area AA1 and/or the second display area AA 2. If the second difference is greater than the second predetermined difference, it is determined that the voltage value of the boundary point C1 of the first power line 11 is larger, and the brightness of the first display area AA1 is brighter according to the current formula, so that the brightness of the first display area AA1 can be adjusted toward decreasing or increasing the brightness of the second display area AA 2.

In some alternative embodiments, since the different gray-scale frames correspond to different currents, that is, the voltage drop (IR drop) on the second power line 12 is different in the different gray-scale frames, the difference between the voltage value provided by the first power module and the voltage value at the boundary point C2 of the second power line 12 may be different in the different gray-scale frames without a distinct boundary between the first display area AA1 and the second display area AA2, that is, the second predetermined difference may be different in the different gray-scale frames.

For example, the first display area AA1 and the second display area AA2 both display 50 gray-scale images, and when there is no obvious boundary between the first display area AA1 and the second display area AA2, the difference between the voltage value provided by the first power supply module 21 and the voltage value at the boundary point C2 of the second power line 12 is 0.19V, and the first predetermined difference corresponding to the 50 gray-scale image may be 0.19V. The first display area AA1 and the second display area AA2 both display 100 gray-scale images, and when there is no obvious boundary between the first display area AA1 and the second display area AA2, the difference between the voltage value provided by the first power module 21 and the voltage value at the boundary point C2 of the second power line 12 is 0.24V, and the first preset difference corresponding to the 100 gray-scale image may be 0.24V. The above numerical values are merely examples and are not intended to limit the present application.

In some optional embodiments, as shown in fig. 8, the display panel 100 further includes a storage module 70, where the storage module 70 is configured to store a lookup table of second preset difference values, and the lookup table includes a plurality of preset grayscales and a plurality of second preset difference values corresponding to the preset grayscales one to one.

For example, the look-up table of the second preset difference value may be as shown in table 2.

TABLE 2

Table 2 is merely an example and is not intended to limit the present application.

The embodiment of the application also provides a voltage regulating circuit for the display panel. As shown in fig. 9, the display panel 100 includes a first display area AA1 and a second display area AA 2. The first display area AA1 is provided with a first power line 11, and the second display area AA2 is provided with a second power line 12. As shown in fig. 4 to 6, the voltage regulating circuit may include a first power supply module 21, a second power supply module 22, a voltage detecting module 30 and a control module 40.

The first power line 11 is connected to the first power supply module 21. The second power line 12 is connected to a second power supply module 22. The voltage detecting module 30 is configured to detect a voltage value of a boundary point of at least one of the first power line 11 and the second power line 12, where a boundary point C1 of the first power line 11 is adjacent to the second display area AA2, and a boundary point C2 of the second power line 12 is adjacent to the first display area AA 1. The control module 40 may be configured to adjust at least one of a voltage value of the first power supply module 21, a voltage value of the second power supply module 22, a data voltage of the first display area AA1, and a data voltage of the second display area AA2 according to the voltage value detected by the voltage detection module 30.

For example, the routing structures of the first power line 11 and the second power line 12 and the positions of the boundary points of the first power line 11 and the second power line 12 may be as described above, and are not described in detail herein.

According to the voltage regulating circuit for the display panel provided by the embodiment of the application, on one hand, since the first display area AA1 and the second display area AA2 respectively use independent power supply modules, and the voltages on the power lines of the first display area AA1 and the second display area AA2 are independent from each other, the problem of overall power consumption increase caused by the fact that the first display area AA1 and the second display area AA2 share the same power supply module can be avoided; on the other hand, the voltage detection module 30 is configured to detect a voltage value of a boundary point of at least one of the first power line 11 and the second power line 12, and the control module 40 is configured to adjust at least one of the voltage value of the first power supply module 21, the voltage value of the second power supply module 22, the data voltage of the first display area AA1, and the data voltage of the second display area AA2 according to the voltage value detected by the voltage detection module 30, so as to adjust the brightness of the first display area AA1 and/or the second display area AA2, thereby improving a boundary line existing between the first display area AA1 and the second display area AA 2.

In some optional embodiments, the voltage detection module includes at least one of a first transistor and a second transistor;

In some optional embodiments, the first control signal terminal and/or the second control signal terminal are disposed at the control module.

In some optional embodiments, the first power line is electrically connected to the first power supply module through a first connection line, the second power line is electrically connected to the second power supply module through a second connection line, the second pole of the first transistor is electrically connected to the first control signal terminal through the second connection line, and/or the second pole of the second transistor is electrically connected to the second control signal terminal through the first connection line;

In some optional embodiments, the voltage detection module is configured to detect a voltage value at a boundary point of the first power line and the second power line, and the control module is specifically configured to:

In some optional embodiments, the area of the first display area is smaller than the area of the second display area, the voltage detection module is configured to detect a voltage value of a boundary point of the second power line, and the control module is specifically configured to:

In some optional embodiments, the voltage regulating circuit further includes a storage module, where the storage module is configured to store a lookup table of the first preset difference, and the lookup table includes a plurality of preset gray scales and a plurality of first preset difference values corresponding to the preset gray scales one to one.

In some optional embodiments, the voltage regulating circuit further includes a storage module, where the storage module is configured to store a lookup table of second preset difference values, and the lookup table includes a plurality of preset gray scales and a plurality of second preset difference values corresponding to the plurality of preset gray scales one to one.

In some optional embodiments, the first display area comprises a first sub-area adjacent to a second display area, the second display area comprises a second sub-area adjacent to the first display area, and the voltage regulation circuit further comprises a judgment module;

As shown in fig. 10, an embodiment of the present application provides a voltage adjustment method for a display panel, where the display panel includes a first display area and a second display area, the first display area is provided with a first power line, and the second display area is provided with a second power line, and the method includes steps 110 to 120.

Step 110, detecting a voltage value of a boundary point of at least one of a first power line and a second power line, where the boundary point of the first power line is adjacent to a second display area of the display panel, and the boundary point of the second power line is adjacent to the first display area of the display panel.

And step 120, adjusting at least one of a voltage value of a first power supply module electrically connected with the first power line, a voltage value of a second power supply module electrically connected with the second power line, a data voltage of the first display area, and a data voltage of the second display area according to the detected voltage value.

According to the voltage regulation method for the display panel provided by the embodiment of the application, on one hand, the first display area and the second display area are respectively provided with the independent power supply modules, and the voltages on the power lines of the first display area and the second display area are mutually independent, so that the problem of integral power consumption increase caused by the fact that the first display area and the second display area share the same power supply module can be solved; on the other hand, by detecting the voltage value of the boundary point of at least one of the first power line and the second power line and adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the voltage value detected by the voltage detection module, the brightness of the first display area and/or the second display area can be adjusted, so that the boundary line existing between the first display area and the second display area is improved.

In some optional embodiments, the detecting the voltage value of the boundary point of at least one of the first power line and the second power line in step 110 may specifically include:

detecting a voltage value of a boundary point of at least one of the first power line and the second power line in a blanking interval of the display panel.

In some optional embodiments, step 110 may specifically include:

detecting a voltage value of a boundary point of the first power line and the second power line;

step 120 may specifically include:

In some optional embodiments, the area of the first display area is smaller than the area of the second display area, and step 110 may specifically include:

detecting a voltage value of a boundary point of the second power line;

step 120 may specifically include:

In some optional embodiments, the method provided in the embodiments of the present application may further include:

and the lookup table stores the first preset difference value, and comprises a plurality of preset gray scales and a plurality of first preset difference values which correspond to the preset gray scales one by one.

and the lookup table stores second preset difference values, and comprises a plurality of preset gray scales and a plurality of second preset difference values which correspond to the preset gray scales one by one.

In some optional embodiments, the first display area includes a first sub-area adjacent to the second display area, and the second display area includes a second sub-area adjacent to the first display area, and the method provided in this embodiment may further include:

judging whether the first sub-area and the second sub-area display the same picture, wherein the same picture comprises a white picture and a pure color picture;

Based on the same inventive concept, as shown in fig. 11, an embodiment of the present application further provides a display device 1000 including the display panel 100. The display device may be: any product or component with a display function, such as a mobile phone, a tablet computer, a television, a display, a notebook computer, a digital photo frame, a navigator and the like. The implementation of the display device can refer to the above embodiment of the driving chip, and repeated descriptions are omitted.

In accordance with the embodiments of the present application as described above, these embodiments are not exhaustive and do not limit the application to the specific embodiments described. Obviously, many modifications and variations are possible in light of the above teaching. The embodiments were chosen and described in order to best explain the principles of the application and its practical application, to thereby enable others skilled in the art to best utilize the application and its various modifications as are suited to the particular use contemplated. The application is limited only by the claims and their full scope and equivalents.

Claims

1. The utility model provides a display panel which characterized in that, display panel includes first display area and second display area, first display area is provided with first power cord, second display area is provided with the second power cord, display panel includes:

the second power supply module is electrically connected with the second power line;

the voltage detection module is used for detecting the voltage value of a boundary point of at least one of the first power line and the second power line, the boundary point of the first power line is adjacent to the second display area, and the boundary point of the second power line is adjacent to the first display area;

2. The display panel according to claim 1, wherein the voltage detection module includes at least one of a first transistor and a second transistor;

a first electrode of the first transistor is electrically connected with a boundary point of the first power line, a second electrode of the first transistor is electrically connected with the control module, and a grid electrode of the first transistor is electrically connected with a first control signal end;

a first pole of the second transistor is electrically connected with a boundary point of the second power line, a second pole of the second transistor is electrically connected with the control module, and a grid electrode of the second transistor is electrically connected with a second control signal end;

preferably, the first control signal terminal and/or the second control signal terminal are/is arranged on the control module;

preferably, the first power line is electrically connected to the first power supply module through a first connection line, the second power line is electrically connected to the second power supply module through a second connection line, the second pole of the first transistor is electrically connected to the first control signal terminal through the second connection line, and/or the second pole of the second transistor is electrically connected to the second control signal terminal through the first connection line;

the voltage detection module is specifically configured to: and detecting a voltage value in a blanking interval of the display panel.

3. The display panel according to claim 1, wherein the voltage detection module is configured to detect a voltage value at a boundary point of the first power line and the second power line, and the control module is specifically configured to:

calculating a first difference value between the voltage value of the boundary point of the first power line and the voltage value of the boundary point of the second power line detected by the voltage detection module;

and adjusting at least one of the voltage value of the first power supply module, the voltage value of the second power supply module, the data voltage of the first display area and the data voltage of the second display area according to the comparison result of the first difference and a first preset difference.

4. The display panel according to claim 1, wherein an area of the first display region is smaller than an area of the second display region, the first display region being adjacent to the second display region; the voltage detection module is configured to detect a voltage value of a boundary point of the second power line, and the control module is specifically configured to:

and adjusting the voltage value of the first power supply module or the data voltage of the first display area according to the comparison result of the second difference value and a second preset difference value.

5. The display panel according to claim 3, wherein the display panel further comprises a storage module, the storage module is configured to store a lookup table of the first preset difference, and the lookup table comprises a plurality of preset grayscales and a plurality of first preset difference values corresponding to the preset grayscales one to one.

6. The display panel according to claim 4, wherein the display panel further comprises a storage module, the storage module is configured to store a lookup table of the second preset difference, and the lookup table comprises a plurality of preset grayscales and a plurality of second preset difference values corresponding to the preset grayscales one to one.

7. The display panel according to claim 1, wherein the first display region comprises a first sub-region adjacent to the second display region, the second display region comprises a second sub-region adjacent to the first display region, and the display panel further comprises a judgment module;

the judging module is used for judging whether the first sub-area and the second sub-area display the same picture or not, wherein the same picture comprises a white picture and a pure color picture;

and if the first sub-area and the second sub-area display the same picture, the voltage detection module starts to detect the voltage value, and if the first sub-area and the second sub-area display different pictures, the voltage detection module stops detecting the voltage value.

8. A voltage regulating circuit for a display panel, wherein the display panel includes a first display area and a second display area, the first display area is provided with a first power supply line, the second display area is provided with a second power supply line, the voltage regulating circuit comprising:

9. A voltage adjustment method of a display panel, wherein the display panel includes a first display area provided with a first power line and a second display area provided with a second power line, the method comprising:

detecting a voltage value of a boundary point of at least one of the first power line and the second power line, the boundary point of the first power line being adjacent to a second display area of the display panel, the boundary point of the second power line being adjacent to a first display area of the display panel;

10. A display device characterized by comprising the display panel according to any one of claims 1 to 7.