CN115424567B

CN115424567B - Display module and display device

Info

Publication number: CN115424567B
Application number: CN202211004464.0A
Authority: CN
Inventors: 李弟鹏; 赖勐; 陈强; 钟晨; 周井雄
Original assignee: Xiamen Tianma Display Technology Co Ltd
Current assignee: Xiamen Tianma Display Technology Co Ltd
Priority date: 2022-08-22
Filing date: 2022-08-22
Publication date: 2024-09-10
Anticipated expiration: 2042-08-22
Also published as: CN115424567A

Abstract

The application discloses a display module and a display device. The display module comprises a display panel and a data driving circuit, wherein the display panel comprises a plurality of data lines and a plurality of rows of sub-pixels, and the data lines transmit data signals output by the data driving circuit to the sub-pixels; the data driving circuit is used for outputting a plurality of data signals to a plurality of sub-pixels connected with the same data line in the same frame by different driving capacities, and in the extending direction of the data line, along with the increase of the distance between the plurality of rows of sub-pixels and the data driving circuit, the driving capacities of the data driving circuit are in a trend of increasing, and the driving capacities represent the speed of the data driving circuit outputting the data signals. According to the display module and the display device provided by the embodiment of the application, the power consumption can be reduced.

Description

Display module and display device

Technical Field

The application relates to the technical field of display, in particular to a display module and a display device.

Background

With the continuous update of display technologies, performance requirements of display modules are increasing, for example, it is desired that power consumption of the display modules be lower. How to reduce the power consumption of the display module is a problem to be considered by those skilled in the art.

Disclosure of Invention

The embodiment of the application provides a display module and a display device, which can reduce power consumption.

In a first aspect, an embodiment of the present application provides a display module, including a display panel and a data driving circuit, where the display panel includes a plurality of data lines and a plurality of rows of sub-pixels, and the data lines transmit data signals output by the data driving circuit to the sub-pixels; the data driving circuit is used for outputting a plurality of data signals to a plurality of sub-pixels connected with the same data line in the same frame by different driving capacities, and in the extending direction of the data line, along with the increase of the distance between the plurality of rows of sub-pixels and the data driving circuit, the driving capacities of the data driving circuit are in a trend of increasing, and the driving capacities represent the speed of the data driving circuit outputting the data signals.

Based on the same inventive concept, in a second aspect, an embodiment of the present application provides a display device including the display module set as the embodiment of the first aspect.

According to the display module and the display device provided by the embodiment of the application, the data driving circuit has different driving capacities for the sub-pixels at the far end and the near end according to different resistance capacitance loads (RC loading) at the far end and the near end. Specifically, as the distance between the plurality of rows of sub-pixels and the data driving circuit increases, the driving capability of the data driving circuit tends to increase, so that the data driving circuit can drive the sub-pixels corresponding to the larger RC loading positions with larger driving capability and drive the sub-pixels corresponding to the smaller RC loading positions with smaller driving capability, thus not only meeting the integrity of data signals required by the sub-pixels at different RC loading positions, but also reducing the power consumption at the smaller RC loading positions, and further reducing the overall power consumption of the display module.

Drawings

Other features, objects and advantages of the present application will become more apparent upon reading the following detailed description of non-limiting embodiments, taken in conjunction with the accompanying drawings, in which like reference characters designate the same or similar features, and in which the figures are not to scale.

Fig. 1 shows a schematic structural diagram of a display module according to an embodiment of the present application;

fig. 2 is a schematic circuit diagram of a sub-pixel in a display module according to an embodiment of the present application;

Fig. 3 is a schematic diagram showing a driving capability of a data driving circuit in a display module according to an embodiment of the application;

Fig. 4 is another schematic diagram showing a driving capability of a data driving circuit in a display module according to an embodiment of the application;

fig. 5 shows a schematic structural diagram of a display module according to an embodiment of the present application;

Fig. 6 is a schematic diagram showing a driving capability of a data driving circuit in a display module according to an embodiment of the application;

Fig. 7 is a schematic diagram of another structure of a display module according to an embodiment of the present disclosure;

fig. 8 is a schematic view of a display scene of a display module according to an embodiment of the present application;

fig. 9 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 the objects, technical solutions and advantages of the present application more apparent, the present application will be described in further detail below with reference to the accompanying drawings and the detailed embodiments. It should be understood that the specific embodiments described herein are merely configured to illustrate the application and are not configured to limit the 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 application by showing examples of the application.

It is noted that relational terms such as first and second, and the like are 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. Moreover, 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 like elements in a process, method, article, or apparatus that comprises the element.

It will be understood that when a layer, an area, or a structure is described as being "on" or "over" another layer, another area, it can be referred to as being directly on the other layer, another area, or another layer or area can be included between the layer and the other layer, another area. And if the component is turned over, that layer, one region, will be "under" or "beneath" the other layer, another region.

It should be understood that the term "and/or" as used herein is merely one relationship describing the association of the associated objects, meaning that there may be three relationships, e.g., a and/or B, may represent: a exists alone, A and B exist together, and B exists alone. In addition, the character "/" herein generally indicates that the front and rear associated objects are an "or" relationship.

The term "connected" may refer to "electrically connected" or "not electrically connected through an intermediate transistor. The term "drive" may refer to "control" or "operation". The display panel may be a display device or a module/part of a display device.

It will be apparent to those skilled in the art that various modifications and variations can be made in the present application without departing from the spirit or scope of the application. Accordingly, it is intended that the present application covers the modifications and variations of this application provided they come within the scope of the appended claims (the claims) and their equivalents. The embodiments provided by the embodiments of the present application may be combined with each other without contradiction.

Before describing the technical solution provided by the embodiments of the present application, in order to facilitate understanding of the embodiments of the present application, the present application firstly specifically describes the problems existing in the related art:

The display panel may include a plurality of rows and columns of sub-pixels, the data lines may be connected to the sub-pixels of the same column, and the data lines may transmit data signals output from the data driving circuit to the sub-pixels connected thereto. For the sake of description below, one end connected to the data driving circuit is referred to as a near end of the data line, and the other end of the data line is referred to as a far end. RC loading of the data line at the far and near ends is inconsistent, specifically, RC loading of the data line at the near end is smaller, and RC loading of the data line at the far end is larger. The inventor found that the driving capability of the data driving circuit in the related art is fixed, that is, the driving capability of the data driving circuit for providing the data signal to the sub-pixels near and far of the data line is fixed, and in order to satisfy the integrity of the data signal required by the sub-pixel far of the data line, the data driving circuit provides the data signal to the sub-pixel of the whole display panel with a larger driving capability, and the power consumption is increased when refreshing the display relative to the sub-pixel near the data line.

In view of the above-mentioned research of the inventor, it is found that the driving capability of the data driving circuit is fixed and unchanged in the related art, for example, the driving capability of the data driving circuit can be dynamically adjusted according to the distance between the sub-pixel and the data driving circuit, so that the whole power consumption of the display module is reduced while the integrity of the data signal required by the far-end sub-pixel is satisfied.

Specifically, the embodiment of the application provides a display module and a display device, which can reduce the power consumption of the display module and the display device.

The following first describes a display module provided by an embodiment of the present application.

Fig. 1 is a schematic structural diagram of a display module according to an embodiment of the present application. As shown in fig. 1, a display module 100 according to an embodiment of the present application may include a display panel 10 and a data driving circuit 20.

The display panel provided by the application can be an Organic Light-Emitting Diode (OLED) display panel. Those skilled in the art will appreciate that in other implementations of the application, the display panel may also be a Micro light emitting diode (Micro LED) display panel, a quantum dot display panel, or the like.

As one example, the display panel may include a display area AA and a non-display area NA. The non-display area NA may be disposed at least partially around the display area AA. The non-display area NA may include a bonding area (not shown) to which a flexible circuit board (Flexible Printed Circuit, FPC) may be bonded, the flexible circuit board may be bent to the backlight of the display panel, and the data driving circuit 20 may be bonded to the backlight of the display panel through the flexible circuit board. This is merely an example and is not intended to limit the present application.

The data driving circuit 20 may be an integrated circuit (INTEGRATED CIRCUIT, IC).

The display panel 10 may include a plurality of data lines 11 and a plurality of sub-pixels 12. The plurality of sub-pixels 12 may be arranged in an array in the row direction X and the column direction Y. The data lines 11 and the subpixels 12 may be distributed in the display area AA. The data lines 11 may extend in the column direction Y.

The data line 11 may be connected to the subpixels 12 of the same column, and the plurality of subpixels 12 connected to the same data line 11 may be located in different rows. The data line 11 is connected to a data driving circuit 20. The data driving circuit 20 may generate a data signal, the data line 11 may transmit the data signal output from the data driving circuit 20 to the sub-pixel 12, and the sub-pixel 12 may emit light with different brightness according to different data signals.

For convenience of description, for example, the a-end of the data line 11 is the end closer to the data driving circuit 20, and the b-end of the data line 11 is the end farther from the data driving circuit 20, and the a-end may be referred to as the proximal end and the b-end may be referred to as the distal end. The sub-pixels 11 have n rows, n is greater than 2 and is an integer, the 1 st row of sub-pixels 11 is connected to the a end of each data line 11, and the n th row of sub-pixels 11 is connected to the b end of each data line 11. In the column direction Y, the 1 st row of the sub-pixels 11 is farthest from the data driving circuit 20, and the n th row of the sub-pixels 11 is closest to the data driving circuit 20.

The display panel 10 may further include a gate driving circuit (not shown), and the output scanning signals of the gate driving circuit may scan the rows of sub-pixels 12 in a certain manner. For example, each row of sub-pixels 12 may be scanned line by line from top to bottom, or each row of sub-pixels 12 may be scanned line by line from bottom to top. Here, the upper may refer to the 1 st row of subpixels 12, and the lower may refer to the n-th row of subpixels 12.

The data driving circuit 20 may be configured to output a plurality of data signals to the plurality of sub-pixels 12 connected to the same data line 11 with different driving capabilities within one frame, and the driving capabilities of the data driving circuit 20 tend to increase as the distances between the plurality of rows of sub-pixels 12 and the data driving circuit 20 increase in the extending direction of the data line 11.

The driving capability indicates the speed at which the data driving circuit 20 outputs the data signal. The stronger the driving capability of the data driving circuit 20, the shorter the time required for the output terminal of the data driving circuit 20 to change from the low level to the high level. That is, the stronger the driving capability of the data driving circuit 20, the larger the slope of the output terminal of the data driving circuit 20 from 0 to the target signal. The driving capability can be intuitively understood as the thrust of the data driving circuit 20 on the data signal.

For example, in the column direction Y, the distance between the 1 st row of sub-pixels 12 and the data driving circuit 20 is the largest, the distance between the n-th row of sub-pixels 12 and the data driving circuit 20 is the smallest, and the data driving circuit 20 can output data signals to the 1 st row of sub-pixels 12 with a larger driving capability and output data signals to the n-th row of sub-pixels 12 with a smaller driving capability.

It will be appreciated that the distance between each row of sub-pixels 12 and the data driving circuit 20 from top to bottom gradually decreases, and if each row of sub-pixels 12 is scanned row by row in a top to bottom manner, the driving capability of the data driving circuit 20 tends to decrease. The distance between each row of the sub-pixels 12 and the data driving circuit 20 increases gradually, and if each row of the sub-pixels 12 is scanned row by row in a bottom-up manner, the driving capability of the data driving circuit 20 tends to increase.

In order to more clearly understand the influence of the driving capability of the data driving circuit 20 on the power consumption, as shown in fig. 2, the sub-pixel may include a light emitting element D and a pixel circuit driving the light emitting element D to emit light. The pixel circuit may include a storage capacitor Cst and a driving transistor T1. For example, fig. 2 illustrates an example in which the pixel circuit includes a storage capacitor Cst and seven transistors (M1 to M7), wherein the third transistor M3 is a driving transistor, PVDD represents a first power line, PVEE represents a second power line, S1 represents a first scan line, S2 represents a second scan line, emit represents a light emission control signal line, and Vref represents an initialization signal line. The connection manner of each element and the signal line is shown in fig. 2, and will not be described in detail herein. The first pole of the storage capacitor Cst is connected to the gate of the third transistor M3, the second pole of the storage capacitor Cst is connected to the first power line PVDD, and N1, N2, N3, and N4 represent connection nodes.

The operation of the pixel circuit may include an initialization phase, a data writing phase, and a light emitting phase.

In the initialization stage, the scan signal transmitted by the first scan line S1 may control the fifth transistor M5 to be turned on, and the initialization signal transmitted by the initialization signal line Vref may be written into the gate of the third transistor M3 and the first pole of the storage capacitor Cst, and initialize the gate of the third transistor M3 and the first pole of the storage capacitor Cst.

In the data writing stage, the second transistor M2 and the fourth transistor M4 may be controlled to be turned on by the scan signal transmitted by the second scan line S2, the third transistor M3 may also be turned on in the stage, the data signal transmitted by the data line 11 may be written into the gate of the third transistor M3 and the first pole of the storage capacitor Cst, and the fourth transistor M4 may capture the threshold voltage of the third transistor M3. In addition, at this stage, the scan signal transmitted by the second scan line S2 may control the seventh transistor M7 to be turned on, and the initialization signal transmitted by the initialization signal line Vref may be written into the anode of the light emitting element D to initialize the anode of the light emitting element D.

In the light emitting stage, the light emission control signal transmitted by the light emission control signal line Emit may control the first transistor M1 and the sixth transistor M6 to be turned on, and the third transistor M3 generates a driving current and transmits the driving current to the light emitting element D, and the light emitting element D emits light.

In the data writing stage, the data signal transmitted by the data line 11 is loaded to the first pole of the storage capacitor Cst, so as to charge the storage capacitor Cst, and generate a charging current. The inventors have found that the larger the driving capability of the data driving circuit 20, the faster the storage capacitor Cst is charged to a desired voltage, but at the same time the charging current is increased, resulting in more energy being lost on the wiring and the device.

In the column direction Y, the RC loading of the data line 11 gradually increases as the distance from the data driving circuit 20 increases. In the embodiment of the application, the data driving circuit has different driving capacities for the sub-pixels at the far end and the near end according to different RC loading at the far end and the near end. Specifically, as the distance between the plurality of rows of sub-pixels and the data driving circuit increases, the driving capability of the data driving circuit increases, so that the data driving circuit 20 can drive the sub-pixels corresponding to the larger RC loading position with larger driving capability and drive the sub-pixels corresponding to the smaller RC loading position with smaller driving capability, thus not only meeting the integrity of data signals required by the sub-pixels at different RC loading positions, but also reducing the power consumption at the smaller RC loading position, and further reducing the overall power consumption of the display module.

In some alternative embodiments, the manner in which the driving capability of the data driving circuit 20 increases as the distance between the plurality of rows of sub-pixels 12 and the data driving circuit 20 increases in the extending direction of the data line 11 may include various cases. For example, the increase may be a linear increase as shown by line 1 in fig. 3. For another example, the increase may be an exponential increase as shown by curve 2 or curve 3 in fig. 3. For another example, the increasing manner may be a stepwise increase as shown in fig. 4. In fig. 3 and 4, the vertical axis represents the driving capability of the data driving circuit 20, and the horizontal axis represents the distance between each row of sub-pixels 12 and the data driving circuit 20 in the extending direction of the data line 11. In the case where the distance between the 1 st row of sub-pixels 12 and the data driving circuit 20 is the largest and the distance between the n-th row of sub-pixels 12 and the data driving circuit 20 is the smallest, the horizontal axis in fig. 3 and 4 may also represent the number of rows of sub-pixels 12. Fig. 3 and 4 show changes in the driving capability of the data driving circuit 20 in the same frame.

Fig. 3 and 4 are only examples, and the driving capability of the data driving circuit 20 may be increased without a certain rule. For example, according to the trend that the driving capability of the data driving circuit 20 generally increases with the increase of the distance between the plurality of rows of sub-pixels 12 and the data driving circuit 20, a plurality of driving capabilities are set and the display module is simulated to determine the driving capability corresponding to each row of sub-pixels finally, so as to reduce the overall power consumption of the display module while meeting the integrity of the data signals required by each row of sub-pixels.

It is understood that the stronger the driving capability of the data driving circuit 20, the stronger the data signal writing capability, and the weaker the driving capability of the data driving circuit 20, the weaker the data signal writing capability. The RC loading corresponding to the same row of sub-pixels 12 is the same, so that in order to ensure the consistency of the writing capability of the data signals corresponding to the same row of sub-pixels 12 in the same frame, the data driving circuit 20 may output a plurality of data signals to the same row of sub-pixels with the same driving capability in the same frame. This ensures that the same row of subpixels 12 are displayed uniformly in the same frame.

It should be noted that, the data driving circuit 20 outputs a plurality of data signals to the same row of sub-pixels with the same driving capability in the same frame, and it is not particularly specified that the values of the data signals provided by the data driving circuit 20to the same row of sub-pixels in the same frame are the same, and the data signals provided by the data driving circuit 20to the same row of sub-pixels in the same frame are determined according to the actual display requirements. For example, if the same line of subpixels in the same frame need to display the same picture, the data signals corresponding to the same line of subpixels in the same frame may be the same. For another example, when the same row of subpixels in the same frame need to display different pictures, the data signals corresponding to the same row of subpixels in the same frame may be different.

For convenience of description, different driving capabilities of the data driving circuit 20 are referred to as different driving gears of the data driving circuit 20. It is understood that the number of driving steps of the data driving circuit 20 is greater than 1.

As an example, the number of driving stages of the data driving circuit 20 may be equal to the number of rows of the sub-pixels 11, in which case, the plurality of driving stages of the data driving circuit 20 may correspond to the plurality of rows of the sub-pixels 12 one by one, and the data driving circuit 20 may be configured to output a plurality of data signals to any two adjacent rows of the sub-pixels 12 with different driving capabilities within the same frame. That is, the driving capability of the data driving circuit 20 corresponding to the sub-pixels 12 of any different row to which the data line 11 is connected within the same frame may be different. Therefore, the driving capability corresponding to each row of sub-pixels can be controlled in the finest mode, and the overall power consumption of the display module is reduced in a finer mode.

As another example, the number of driving steps of the data driving circuit 20 is greater than 1 and less than the number of rows of the sub-pixels 12, in which case at least one driving step of the plurality of driving steps of the data driving circuit 20 may correspond to a plurality of rows of the sub-pixels 12. As shown in fig. 5, the display area AA of the display panel 10 may include a plurality of first sub-display areas A1 arranged in the extending direction Y of the data lines 11. The at least one first sub-display area A1 may include at least two rows of sub-pixels 12. The number of rows of sub-pixels 12 in each of the first sub-display areas A1 may be equal or unequal. Alternatively, the number of rows of the sub-pixels 12 in each of the first sub-display areas A1 may be equal.

The data driving circuit 20 is specifically operable to: the plurality of data signals are output to the sub-pixels 12 in the same first sub-display area A1 with the same driving capability in the same frame, and the plurality of data signals are output to the sub-pixels 12 in different first sub-display areas A1 with different driving capabilities.

That is, the driving capability of the data driving circuits 20 corresponding to the sub-pixels 12 in the same first sub-display area A1 in the same frame may be the same, and the driving capability of the data driving circuits 20 corresponding to the sub-pixels 12 in different first sub-display areas A1 in the same frame may be the same.

It is understood that, in the case where the first sub-display area A1 includes a plurality of rows of the sub-pixels 12, the driving capability of the data driving circuits 20 corresponding to the plurality of rows of the sub-pixels 12 belonging to the same first sub-display area A1 is the same.

In the embodiment of the present application, the number of driving gears of the data driving circuit 20 is greater than 1 and smaller than the number of rows of the sub-pixels 12, so that the design difficulty of the data driving circuit 20 can be reduced.

In the actual display process of the display panel 10, a plurality of frames of pictures need to be displayed. For example, when multiple rows of sub-pixels are scanned from top to bottom, if the driving capability of the data driving circuit 20 integrally shows a decreasing trend in multiple frames during continuous display of multiple frames, the driving capability of the data driving circuit 20 is too small when displaying the following frames, so that the integrity requirement of the sub-pixels on the written data signals cannot be met, and the display effect is affected. For example, when a plurality of sub-pixels are scanned from bottom to top, if the driving capability of the data driving circuit 20 is increased in the plurality of frames, the driving capability of the data driving circuit 20 is excessively increased when the following frames are displayed, and the power consumption is increased.

To avoid the above phenomenon, the data driving circuit 20 may further be configured to: before displaying the ith frame of image, resetting the driving capability to a preset initial value, wherein i is a positive integer.

For example, the data driving circuit 20 may perform a reset before displaying each frame of the image. As shown in fig. 6, the driving capability of the data driving circuit 20 may be gradually increased within the same frame by scanning a plurality of rows of sub-pixels in a bottom-up manner. After the end of the previous frame, i.e. before the start of the next frame, the driving capability of the data driving circuit 20 is reset and a new round of adjustment is performed in the next frame. In fig. 6, the vertical axis represents driving capability, and the horizontal axis may represent time T.

For another example, the data driving circuit 20 may perform a reset at intervals of a preset number of frames.

In addition, the driving capability of the data driving circuit 20 may be changed in the same manner in different frames, for example, in a linear change, a stepwise change, an exponential change, or the like.

It is understood that the initial value corresponding to the driving capability of the data driving circuit 20 may be set according to actual requirements. For example, if a plurality of rows of sub-pixels are scanned in a bottom-up manner, an initial value corresponding to the driving capability of the data driving circuit 20 may be a minimum value of the driving capability of the data driving circuit 20. If a plurality of rows of sub-pixels are scanned from top to bottom, the initial value corresponding to the driving capability of the data driving circuit 20 may be the maximum value of the driving capability of the data driving circuit 20.

As described above, the stronger the driving capability of the data driving circuit 20, the stronger the data signal writing capability, and the weaker the driving capability of the data driving circuit 20, the weaker the data signal writing capability. The RC loading corresponding to the same row of sub-pixels 12 is the same, so that in order to ensure the consistency of the writing capability of the data signals corresponding to the same row of sub-pixels 12 in different frames, the data driving circuit 20 can output a plurality of data signals to the same row of sub-pixels with the same driving capability in different frames. This ensures that the same row of subpixels 12 is displayed uniformly in different frames.

The power consumption of the display module is also related to the voltage on the first power line PVDD, and the higher the voltage of the first power line PVDD, the larger the power consumption, whereas the lower the voltage of the first power line PVDD, the smaller the power consumption, under the condition that the voltage of the second power line PVEE is fixed. In the related art, the first power line PVDD connected to all the sub-pixels in the display panel is connected to the same power terminal. Still taking the circuit structure of the sub-pixel shown in fig. 2 as an example, the driving current i=k (Vdd-Vdata) ², vdd represents the voltage of the first power line PVDD, vdata represents the data voltage, and the display brightness of the sub-pixel is positively correlated with the driving current, so that the voltage of the power supply terminal connected to the first power line PVDD is higher in order to achieve the brightness of each sub-pixel in the related art. The inventors have found that in an actual display, different display areas of the display panel need to display different brightness, and for dark areas (also referred to as low brightness areas), if the first power line PVDD is still connected to the power supply terminal providing a higher voltage, this results in higher power consumption.

In order to avoid the above phenomenon, as shown in fig. 7, the display area AA of the display panel 10 may include a plurality of second sub-display areas A2. The plurality of second sub-display areas A2 may be distributed in an array in the row direction X and the column direction Y. The number of the second sub-display areas A2 may be set according to actual needs.

In addition, the first and second sub-display areas A1 and A2 may be independent from each other, or the first and second sub-display areas A1 and A2 may overlap in positional relationship, or the number of the first sub-display areas A1 may be less than the number of the second sub-display areas A2, for example, the first sub-display area A1 may include a plurality of the second sub-display areas A2.

Each of the second sub-display areas A2 includes a first power line PVDD, and the wiring method of the first power line PVDD in each of the second sub-display areas A2 is not limited. For example, the first power supply lines PVDD in the second sub-display area A2 may be wired in a grid shape. For another example, the plurality of first power lines PVDD in the second sub display area A2 may extend in the column direction Y and be arranged in the row direction X. For another example, the plurality of first power lines PVDD in the second sub display area A2 may extend in the row direction X and be arranged in the column direction Y.

The number of the power signal terminals 30 may include a plurality, and the plurality of power signal terminals 30 may be disposed in the non-display area NA of the display panel. The plurality of sub-pixels 12 of the same second sub-display area A2 are connected to the same power signal terminal 30 through the first power line PVDD, and the sub-pixels 12 of different second sub-display areas A2 are connected to different power signal terminals 30. It is understood that there may be no connection relationship between the first power lines PVDD belonging to different second sub-display areas A2.

In the embodiment of the application, the first power line PVDD can be controlled in a partitioning manner, and further, different power signal terminals 30 can be utilized to provide different voltages according to actual display requirements of each second sub-display area A2, for example, for the second sub-display area A2 with higher display brightness, the corresponding power signal terminal 30 can provide a first voltage value, and for the second sub-display area A2 with lower display brightness, the corresponding power signal terminal 30 can provide a second voltage value, and the second voltage value can be obtained after the first voltage value is reduced, so that not only can the display requirements of different second sub-display areas A2 be met, but also the power consumption of the second sub-display area A2 with low brightness can be reduced.

As an example, the second sub-display area A2 may include a plurality of sub-pixels 12, and the luminance corresponding to the second sub-display area A2 may be an average luminance of the plurality of sub-pixels 12 included therein. When the brightness corresponding to the sub-pixel 12 can be determined according to the gray scale to be displayed, further, the brightness corresponding to the second sub-display area A2 can be determined according to the average value of the gray scales to be displayed by the plurality of sub-pixels 12 included therein. For example, the gray scale of the display panel ranges from 0 to 255, and the higher the gray scale to be displayed by the sub-pixel, the higher the corresponding brightness.

The different degree of filling in fig. 8 represents the different brightness corresponding to the second sub-display area A2. As shown in fig. 8, at least some of the second sub-display areas A2 are different in brightness, and as the brightness of the plurality of second sub-display areas A2 decreases, the voltage of the power signal terminal 30 corresponding to the second sub-display area A2 tends to decrease. Therefore, the power consumption of the second sub-display area A2 with low brightness can be reduced, dynamic adjustment can be performed according to different brightness areas, and the contrast ratio is enhanced.

The specific value of the voltage of the power signal terminal 30 corresponding to the second sub-display area A2 with different brightness may be determined according to the actual display situation, which is not limited in the present application.

As described above, the driving current i=k (Vdd-Vdata) ² is related to not only the voltage of the first power supply line PVDD but also the magnitude of the data voltage. Under the condition that the voltages of the power supply signal terminals corresponding to different sub-pixels are different and the brightness corresponding to the different sub-pixels is the same, namely, the Vdd values corresponding to the different sub-pixels are different and the driving currents I corresponding to the different sub-pixels are required to be the same, the Vdata values corresponding to the different sub-pixels are required to be adjusted to be different, and therefore the purposes that the driving currents of the different sub-pixels are the same, namely, the brightness of the different sub-pixels is the same are achieved.

Based on the same inventive concept, the application also provides a display device comprising the display module provided by the application. Referring to fig. 9, fig. 9 is a schematic structural diagram of a display module according to an embodiment of the application. Fig. 9 provides a display device 1000 including a display module 100 according to any of the above embodiments of the present application. The embodiment of fig. 9 is only an example of a mobile phone, and the display device 1000 is described, and it is to be understood that the display device provided in the embodiment of the present application may be a wearable product, a computer, a television, a vehicle-mounted display device, or other display devices with display functions, which is not particularly limited in the present application. The display device provided by the embodiment of the application has the beneficial effects of the display module provided by the embodiment of the application, and the specific description of the display module in each embodiment can be referred to specifically, and the embodiment is not repeated here.

These embodiments are not exhaustive of all details, nor are they intended to limit the application to the precise embodiments disclosed, in accordance with the application. 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 the practical application, to thereby enable others skilled in the art to best utilize the application and various modifications as are suited to the particular use contemplated. The application is limited only by the claims and the full scope and equivalents thereof.

Claims

1. The display module is characterized by comprising a display panel and a data driving circuit, wherein the display panel comprises a plurality of data lines and a plurality of rows of sub-pixels, and the data lines transmit data signals output by the data driving circuit to the sub-pixels;

The data driving circuit is used for outputting a plurality of data signals to a plurality of sub-pixels connected with the same data line in the same frame by different driving capacities, and in the extending direction of the data line, along with the increase of the distance between the plurality of rows of sub-pixels and the data driving circuit, the driving capacities of the data driving circuit are in an increasing trend, the driving capacities represent the speed of the data driving circuit outputting the data signals, and the stronger the driving capacities are, the shorter the time required for the signal at the output end of the data driving circuit to change from a low level to a high level is.

2. The display module of claim 1, wherein the manner in which the driving capability of the data driving circuit is increased comprises any one of: stepwise increase, exponential increase, linear increase.

3. The display module of claim 1, wherein the data driving circuit is further configured to output a plurality of data signals to the sub-pixels in the same row with the same driving capability in the same frame.

4. A display module according to claim 3, wherein the display area of the display panel includes a plurality of first sub-display areas arranged in an extending direction of the data lines;

The data driving circuit is specifically configured to output a plurality of data signals to the sub-pixels in the same first sub-display area with the same driving capability in the same frame, and output a plurality of data signals to the sub-pixels in different first sub-display areas with different driving capabilities.

5. A display module according to claim 3, wherein the data driving circuit is further configured to output a plurality of data signals to any two adjacent rows of the sub-pixels with different driving capabilities within the same frame.

6. A display module according to claim 3, wherein the data driving circuit is further configured to reset the driving capability to a predetermined initial value before displaying the i-th frame of image, wherein i is a positive integer.

7. The display module of claim 3 or 6, wherein the data driving circuit is further configured to output a plurality of data signals to the sub-pixels in the same row with the same driving capability in different frames.

8. The display module of claim 1, wherein the display area of the display panel includes a plurality of second sub-display areas, each of the second sub-display areas includes a first power line, the plurality of sub-pixels of the same second sub-display area are connected to the same power signal terminal through the first power line, and the sub-pixels of different second sub-display areas are connected to different power signal terminals.

9. The display module of claim 8, wherein the brightness corresponding to the second sub-display area is different, and the voltage of the power signal terminal corresponding to the second sub-display area tends to decrease as the brightness corresponding to the plurality of second sub-display areas decreases.

10. The display module of claim 9, wherein the voltages of the power signal terminals corresponding to different sub-pixels are different, and the data voltages corresponding to different sub-pixels are different when the brightness corresponding to different sub-pixels is the same.

11. A display device comprising a display module according to any one of claims 1 to 10.