Patent Application
20240420624
The present application relates to the field of display technology, and particularly to a display panel, a method for driving a display panel, and a display apparatus.
With the continuous development of display technology, display panels are more and more widely applied, and user's demand for the display panels is greater and greater. The inventors of the present application have found that, at present, the initial cross-voltage value of the light-emitting elements in different areas of some display panels varies greatly, resulting in relatively great brightness difference in the different areas.
Embodiments of the present application provide a display panel, a method for driving a display panel, and a display apparatus, in which the first initialization signal lines in different partitions can be arranged independently, which is beneficial for reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions.
In a first aspect, some embodiments of the present application provide a display panel including at least two partitions, at least two first power supply voltage signal lines, and at least two first initialization signal lines, each of the partitions includes at least one sub-pixel, and the sub-pixel includes a light-emitting element; and the first initialization signal lines connected to first electrodes of light-emitting elements in at least two of the partitions are different, second electrodes of the light-emitting elements in at least two of the partitions are insulated from each other, the first power supply voltage signal lines connected to the second electrodes of the light-emitting elements in at least two of the partitions are different, the first initialization signal line is configured to transmit a first initialization signal for initializing the first electrode of the light-emitting element, and the first power supply voltage signal line is configured to transmit a first power supply voltage signal.
In a second aspect, some embodiments of the present application provide a method for driving a display panel applicable to the display panel according to the first aspect, and the method includes: providing different first initialization signals to the first electrodes of the light-emitting elements in at least two of the partitions through at least two first initialization signal lines; and providing different first power supply voltage signals to the second electrodes of the light-emitting elements in at least two of the partitions through at least two first power supply voltage signal lines.
In a third aspect, some embodiments of the present application provide a driving module electrically connected to the display panel according to the first aspect, and the driving module includes: an acquisition unit configured to acquire, for any i-th partition in the display panel, a voltage value of the first power supply voltage signal provided to the i-th partition and a preset initial cross-voltage value, and i being a positive integer; a calculation unit configured to determine, according to the voltage value of the first power supply voltage signal corresponding to the i-th partition and the preset initial cross-voltage value, a voltage value of the first initialization signal transmitted by the first initialization signal line correspondingly connected to the i-th partition, and the initial cross-voltage value being a voltage difference between the voltage value of the first initialization signal and the voltage value of the first power supply voltage signal; and an output unit configured to provide, based on the determined voltage value of the first initialization signal transmitted by the first initialization signal line correspondingly connected to the i-th partition, the first initialization signal with the determined voltage value to the first initialization signal line correspondingly connected to the i-th partition.
In a fourth aspect, some embodiments of the present application provide a display apparatus including the display panel according to the first aspect or the driving module according to the third aspect.
In the display panel, the method for driving a display panel, and the display apparatus according to the embodiments of the present application, the display panel includes at least two partitions, at least two first power supply voltage signal lines, and at least two first initialization signal lines, each of the partitions includes at least one sub-pixel, and the sub-pixel includes the light-emitting element; and the first initialization signal lines connected to the first electrodes of the light-emitting elements in at least two of the partitions are different, the second electrodes of the light-emitting elements in at least two of the partitions are insulated from each other, the first power supply voltage signal lines connected to the second electrodes of the light-emitting elements in at least two of the partitions are different, the first initialization signal line is configured to transmit the first initialization signal for initializing the first electrode of the light-emitting element, and the first power supply voltage signal line is configured to transmit the first power supply voltage signal. In the embodiments of the present application, both the first initialization signal line and the first power supply voltage signal line are arranged independently for the partitions, so that the first initialization signal lines in different partitions are set independently, and an appropriate initial cross-voltage value for the light-emitting element in each partition can be obtained according to the change in the first power supply voltage signal transmitted by the first power supply voltage signal line, which is beneficial for reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions.
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings to be used in the embodiments of the present application will be briefly introduced below. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without inventive effort.
Features and exemplary embodiments of various aspects of the present application will be described in detail below. In order to make the objectives, technical solutions, and advantages of the present application clearer, the present application will be further described in detail below with reference to the drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely intended to explain the present application, rather than to limit the present application. For those skilled in the art, the present application can be implemented without some of these specific details. The following description of the embodiments is merely to provide a better understanding of the present application by illustrating the examples of the present application.
It should be noted that the transistor in the embodiments of the present application may be an N-type transistor or a P-type transistor. For the N-type transistor, the turn on level is a high level and the turn off level is a low level. That is, the N-type transistor is turned on when the gate of the N-type transistor is at the high level and is turned off when the gate of the N-type transistor is at the low level. For the P-type transistor, the turn on level is a low level and the turn off level is a high level. That is, the P-type transistor is turned on when the control terminal of the P-type transistor is at the low level and is turned off when the control terminal of the P-type transistor is at the high level. In specific implementations, the gate of the transistor is used as its control terminal, and depending on a signal of the gate and the type of the transistor, its first terminal may be used as the source and its second terminal may be used as the drain, or alternatively, its first terminal may be used as the drain and its second terminal may be used as the source, which is not limited herein. Further, the turn on level and the turn off level are used in a general sense in the embodiments of the present application, the turn on level refers to any level that can turn on the transistor, and the turn off level refers to any level that can cut off/turn off the transistor.
In the embodiments of the present application, the term “electrically connected” may indicate that two components are directly electrically connected, or that the two components are electrically connected via one or more other components.
It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the gist or scope of the present application. Accordingly, the present application is intended to encompass the modifications and variations to the present application that fall within the scope of the appended claims (the claimed technical solutions) and equivalents thereof. It should be noted that the implementations provided by the embodiments of the present application can be combined with one another if there is no conflict.
Before the technical solutions provided by the embodiments of the present application are described, the problems in the art are first described in the present application to facilitate the understanding of the embodiments of the present application.
With the continuous development of display technology, display panels are more and more widely applied, and user's demand for the display panels is greater and greater. At present, some display panels use auxiliary cathode graphics to achieve partition based control for the first power supply voltage signal (that is, the ELVSS signal), and an appropriate voltage value of the first power supply voltage signal in each partition can be obtained according to the display brightness and the total current of the partition, so as to save power consumption.
One end of the light-emitting element receives the first power supply voltage signal, and the other end receives the initialization voltage signal (that is, the Vref signal). The initial cross-voltage value of the two ends of the light-emitting element is equal to the difference between the voltage value of the initialization voltage signal and the voltage value of the first power supply voltage signal. Since the voltage values of the first power supply voltage signals in different partitions are different, the initial cross-voltage value of the two ends of the light-emitting element varies significantly if the voltage values of the initialization voltage signals are the same, resulting in relatively great brightness difference in different areas. Especially for low gray scales, the brightness difference in different areas is more obvious.
Based on the above findings of the inventors, the embodiments of the present application provide a display panel, a method for driving a display panel, and a display apparatus, which can solve the above technical problems in the related art.
The technical concept of the embodiments of the present application is that both the first initialization signal line and the first power supply voltage signal line are arranged independently for the partitions, so that the first initialization signal lines in different partitions are set independently, and an appropriate initial cross-voltage value for the light-emitting element in each partition can be obtained according to the change in the first power supply voltage signal transmitted by the first power supply voltage signal line, which is beneficial for reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions.
A display panel according to the embodiments of the present application is first described below.
Each partition F may include at least one sub-pixel, and the sub-pixel may include a light-emitting element D. Herein, the number of the sub-pixels in the partition F may be adjusted flexibly according to actual situations, which is not limited in the embodiments of the present application. Exemplarily, the light-emitting element D includes, but is not limited to, an Organic Light-Emitting Diode (OLED). The first initialization signal line Vref may be electrically connected to a first electrode of the light-emitting element D and configured to transmit a first initialization signal for initializing the first electrode of the light-emitting element D. The first power supply voltage signal line ELVSS may be electrically connected to a second electrode of the light-emitting element D and configured to transmit a first power supply voltage signal. Exemplarily, the first electrode of the light-emitting element D may be an anode of the light-emitting element D, and the second electrode of the light-emitting element D may be a cathode of the light-emitting element D.
In the embodiments of the present application, the first electrodes in the display area of the display panel are insulated from each other, and the first initialization signal lines Vref connected to the first electrodes of the light-emitting elements D in at least two of the partitions F are different. The second electrodes of the light-emitting elements D located in at least two of the partitions F are insulated from each other, that is, not electrically connected to each other. For example, in some examples, the display panel may be provided with isolation structures, which may be located between the light-emitting elements D in different partitions F and configured to isolate the second electrodes of the light-emitting elements D in different partitions F. The first power supply voltage signal lines ELVSS connected to the second electrodes of the light-emitting elements D in at least two of the partitions F are different.
Since the first power supply voltage signal lines ELVSS connected to different partitions F may be different, the voltage values of the first power supply voltage signals received by the light-emitting elements D in different partitions F may be set flexibly for different partitions. Similarly, since the first initialization signal lines Vref connected to different partitions F may be different, the voltage values of the first initialization signals received by the light-emitting elements D in different partitions F may also be set flexibly for different partitions. For example, for a partition F which has a relatively great voltage value of the first power supply voltage signal, the voltage value of the first initialization signal received by the partition F may be set to be relatively great. For a partition F which has a relatively small voltage value of the first power supply voltage signal, the voltage value of the first initialization signal received by the partition F may be set to be relatively small. This is beneficial for reducing the initial cross-voltage value difference for the light-emitting elements in different partitions, and further beneficial for reducing the brightness difference for the light-emitting elements in different partitions.
The display panel according to the embodiments of the present application includes at least two partitions, at least two first power supply voltage signal lines, and at least two first initialization signal lines, each of the partitions includes at least one sub-pixel, and the sub-pixel includes the light-emitting element; and the first initialization signal lines connected to the first electrodes of the light-emitting elements in at least two of the partitions are different, the second electrodes of the light-emitting elements in at least two of the partitions are insulated from each other, the first power supply voltage signal lines connected to the second electrodes of the light-emitting elements in at least two of the partitions are different, the first initialization signal line is configured to transmit the first initialization signal for initializing the first electrode of the light-emitting element, and the first power supply voltage signal line is configured to transmit the first power supply voltage signal. In the embodiments of the present application, both the first initialization signal line and the first power supply voltage signal line are arranged independently for the partitions, so that the first initialization signal lines in different partitions are set independently, and an appropriate initial cross-voltage value for the light-emitting element in each partition can be obtained according to the change in the first power supply voltage signal transmitted by the first power supply voltage signal line, which is beneficial for reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions.
The first power supply voltage signal line ELVSS correspondingly connected to the second partition F2 provides a first power supply voltage signal with a third voltage value, and the first initialization signal line Vref correspondingly connected to the second partition F2 provides a first initialization signal with a fourth voltage value. Specific values of the third voltage value and the fourth voltage value may be set flexibly according to actual situations, which is not limited in the embodiments of the present application.
Herein, the first voltage value is different from the third voltage value, and the second voltage value is different from the fourth voltage value.
That is, the first power supply voltage signal line ELVSS correspondingly connected to the first partition F1 and the first power supply voltage signal line ELVSS correspondingly connected to the second partition F2 may provide first power supply voltage signals with different voltage values. The first power supply voltage signal may be a negative power supply voltage signal. Accordingly, the first initialization signal line Vref correspondingly connected to the first partition F1 and the first initialization signal line Vref correspondingly connected to the second partition F2 may provide first initialization signals with different voltage values.
For example, if a voltage value of the first power supply voltage signal transmitted by the first power supply voltage signal line ELVSS correspondingly connected to the first partition F1 is greater than a voltage value of the first power supply voltage signal transmitted by the first power supply voltage signal line ELVSS correspondingly connected to the second partition F2, a voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the first partition F1 may also be greater than a voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the second partition F2. This is beneficial for reducing the initial cross-voltage value difference for the light-emitting elements in different partitions, and further beneficial for reducing the brightness difference for the light-emitting elements in different partitions.
In some specific embodiments, optionally, a difference between the first voltage value and the second voltage value is a first difference, that is, the initial cross-voltage value of the light-emitting element in the first partition F1 is an absolute value of the first difference, and a difference between the third voltage value and the fourth voltage value is a second difference, that is, the initial cross-voltage value of the light-emitting element in the second partition F2 is an absolute value of the second difference. Herein, a difference between the first difference and the second difference is less than a preset threshold. The preset threshold may be adjusted flexibly according to actual situations, which is not limited in the embodiments of the present application.
The less the preset threshold, the less the difference between the initial cross-voltage value of the light-emitting element in the first partition F1 and the initial cross-voltage value of the light-emitting element in the second partition F2. For example, in some examples, the preset threshold may be equal to 0, that is, the initial cross-voltage value of the light-emitting element in the first partition F1 may be equal to the initial cross-voltage value of the light-emitting element in the second partition F2, thereby reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions to a greater extent.
Still referring to
That is, the first electrodes of the light-emitting elements D in the same partition F may receive first initialization signals with a same voltage value, and the second electrodes of the light-emitting elements D in the same partition F may receive first power supply voltage signals with a same voltage value.
In this way, the first electrodes of the light-emitting elements D in the same partition F are connected to the same first initialization signal line Vref, and the second electrodes of the light-emitting elements D in the same partition F are connected to the same first power supply voltage signal line ELVSS, so that the number of the first initialization signal lines Vref and the number of the first power supply voltage signal lines ELVSS in the display panel can be reduced, which is beneficial for wiring design and saving production cost.
In some examples, the display panel 10 may include a plurality of first bonding pads P, and different second sub-initialization signal lines V2 may be connected to different first bonding pads P. Different first bonding pads P may be electrically connected to different first initialization signal output ends of a driving module (not shown). Herein, the first initialization signal output end is configured to provide the first initialization signal. Exemplarily, the driving module includes, but is not limited to, a display driving chip or a power supply chip.
In this way, since different second sub-initialization signal lines V2 are respectively electrically connected to different first initialization signal output ends of the driving module through different first bonding pads P, and different first initialization signal output ends may output first initialization signals with the same voltage value or different voltage values, different second sub-initialization signal lines V2 may transmit the first initialization signals with the same voltage value or different voltage values, and thus different first sub-initialization signal lines V1 may receive the first initialization signals with the same voltage value or different voltage values.
For example,
The first electrodes of the light-emitting elements D in the partition F1′ may be connected to the first sub-initialization signal line V1-1, and the first sub-initialization signal line V1-1 may be electrically connected to the first bonding pad P1 through the second sub-initialization signal line V2-1. The first electrodes of the light-emitting elements D in the partition F2′ may be connected to the first sub-initialization signal line V1-2, and the first sub-initialization signal line V1-2 may be electrically connected to the first bonding pad P2 through the second sub-initialization signal line V2-2. The first electrodes of the light-emitting elements D in the partition F3′ may be connected to the first sub-initialization signal line V1-3, and the first sub-initialization signal line V1-3 may be electrically connected to the first bonding pad P3 through the second sub-initialization signal line V2-3.
In some examples, the first bonding pad P1, the first bonding pad P2, and the first bonding pad P3 may receive first initialization signals with different voltage values, and thus the second sub-initialization signal line V2-1, the second sub-initialization signal line V2-2, and the second sub-initialization signal line V2-3 may transmit the first initialization signals with different voltage values to the partition F1′, the partition F2′, and the partition F3′.
Still referring to
The first bonding pads P may be located in the second non-display area NA2 and electrically connected to the first initialization signal output ends of the driving module. The second sub-initialization signal lines V2 may be located in the third non-display area NA3 or the fourth non-display area NA4 and extend to the first bonding pads P. For example, in some examples, the first sub-initialization signal line V1 correspondingly connected to one partition F may be connected to two second sub-initialization signal lines V2 which may be located in the third non-display area NA3 and the fourth non-display area NA4, respectively. For example, in some other examples, the first sub-initialization signal line V1 correspondingly connected to one partition F may be connected to one second sub-initialization signal line V2 which may be located in the third non-display area NA3 or the fourth non-display area NA4.
Still referring to
In this way, since the plurality of first wiring portions Z1 and the plurality of second wiring portions Z2 are cross-connected to form a mesh structure, the wiring impedance of the first sub-initialization signal line V1 and the first initialization signal line Vref is greatly reduced, so as to ensure that the voltage values of the first initialization signals received by the light-emitting elements D in the same partition F are the same or similar, thereby ensuring that the initial cross-voltage values of the light-emitting elements D in the same partition F are the same or similar.
Still referring to
For example,
In order to better reduce the wiring impedance of the first sub-initialization signal line V1, in some specific examples, the mesh structure shown in
In this way, since the plurality of first wiring portions Z1 and the second wiring portion Z2 are connected to form a comb-like structure, the wiring impedance of the first sub-initialization signal line V1 and the first initialization signal line Vref is greatly reduced, so as to ensure that the voltage values of the first initialization signals received by the light-emitting elements D in the same partition F are the same or similar, thereby ensuring that initial cross-voltage values of the light-emitting elements D in the same partition F are the same or similar.
As shown
In this way, by arranging the first wiring portion Z1 and the second wiring portion Z2 in at least two metal layers, the first sub-initialization signal line V1 with the mesh structure or the comb-like structure may be formed, which is beneficial for greatly reducing the wiring impedance of the first sub-initialization signal line V1 and the first initialization signal line Vref, so as to ensure that the voltage values of the first initialization signals received by the light-emitting elements D in the same partition F are the same or similar, thereby ensuring that the initial cross-voltage values of the light-emitting elements D in the same partition F are the same or similar.
Still referring to
According to some embodiments of the present application, optionally, the voltage value of the first initialization signal received by each partition may be adjusted flexibly. For example, for any i-th partition in the display panel, a voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the i-th partition is determined according to a voltage value of the first power supply voltage signal transmitted by the first power supply voltage signal line ELVSS correspondingly connected to the i-th partition and a preset initial cross-voltage value, the initial cross-voltage value is a voltage difference between the voltage value of the first initialization signal and the voltage value of the first power supply voltage signal, and i is a positive integer. For example, the initial cross-voltage value may include the first difference and the second difference described above, and the first difference and the second difference may be the same.
For example, the voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the i-th partition may be calculated according to the following equation:
Herein, Vint represents the voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the i-th partition, A represents the preset initial cross-voltage value, and ELVSS' represents the voltage value of the first power supply voltage signal transmitted by the first power supply voltage signal line ELVSS correspondingly connected to the i-th partition.
Herein, the initial cross-voltage value A may be preset, and the specific value of the initial cross-voltage value A may be adjusted flexibly according to actual situations, such as according to the quality of the displayed image (such as the brightness or the chroma uniformity), which is not limited in the embodiments of the present application. After the voltage value ELVSS' of the first power supply voltage signal is determined, the voltage value Vint of the first initialization signal may be determined.
In some embodiments, the initial cross-voltage values corresponding to different partitions may be the same. That is, it is ensured that the initial cross-voltage values of the light-emitting elements in different partitions are the same, so that the brightness difference of the light-emitting elements in the different partitions is relatively less.
In some embodiments, the initial cross-voltage value is greater than 0 V, that is, the voltage value Vint of the first initialization signal is greater than the voltage value ELVSS' of the first power supply voltage signal, so that the first electrode of the light-emitting element has a relatively high potential, which is beneficial for reducing the subsequent charging duration of the light-emitting element, and thus the light-emitting element emits light quickly.
According to some embodiments of the present application, optionally, the display brightness range of the partitions may be divided into a plurality of different brightness intervals, and different partitions may be in different brightness intervals when a complex image is displayed. In order to reduce the initial cross-voltage difference for the light-emitting elements in different partitions as much as possible, optionally, different brightness intervals may correspond to the same initial cross-voltage value. For example, the display brightness range of the partitions is 0 to 1000nit, which may be divided into a plurality of different brightness intervals. For example, 0 to 100nit forms one brightness interval, 101 to 200nit forms one brightness interval, . . . , and 901 to 1000nit forms one brightness interval. Different brightness intervals may correspond to the same initial cross-voltage value, that is, the brightness interval 0 to 100nit corresponds to an initial cross-voltage value A, the brightness interval 101 to 200nit also corresponds to the initial cross-voltage value A, . . . , and the brightness interval 901 to 1000nit also corresponds to the initial cross-voltage value A.
When the partitions are in different brightness intervals, the voltage value Vint of the first initialization signal may be calculated using the same initial cross-voltage value A.
According to some embodiments of the present application, optionally, the voltage value of the first power supply voltage signal transmitted by the first power supply voltage signal line correspondingly connected to the i-th partition may be determined according to the following step one and step two.
Step one: acquiring a target brightness of a sub-image to be displayed by the i-th partition, and the target brightness including an average brightness or a maximum brightness.
The gray scale to be displayed by each sub-pixel in the i-th partition is known, and accordingly, the brightness to be displayed by each sub-pixel in the i-th partition may be determined. For example, there are N sub-pixels in the i-th partition, and in step one, the average of the brightness to be displayed by the N sub-pixels may be calculated or the maximum one of the brightness to be displayed by the N sub-pixels may be selected, as the target brightness of the sub-image to be displayed by the i-th partition.
Step two: determining, according to a current brightness interval in which the target brightness is located and a first correspondence relationship between the brightness interval and the voltage value of the first power supply voltage signal, the target voltage value of the first power supply voltage signal corresponding to the current brightness interval.
The first correspondence relationship between the brightness interval and the voltage value of the first power supply voltage signal may be predetermined, in which different brightness intervals may correspond to different voltage values of the first power supply voltage signals to reduce power consumption. The target voltage value of the first power supply voltage signal corresponding to the current brightness interval may be determined according to the current brightness interval in which the target brightness is located and the first correspondence relationship.
In this way, according to the actual brightness to be displayed by each partition, the voltage value of the first power supply voltage signal received by each partition may be adjusted flexibly, which is beneficial for reducing power consumption.
A control end of the second initialization module 703 is electrically connected to the second scanning signal line S2, a first end of the second initialization module 703 is electrically connected to the second initialization signal line Vref2, and a second end of the second initialization module 703 is electrically connected to a control end of the first driving module 701. The second initialization module 703 may be configured to transmit a second initialization signal of the second initialization signal line Vref2 to the control end of the first driving module 701 to initialize the control end of the first driving module 701.
In the embodiments shown in
It should be noted that the pixel circuit in the embodiments of the present application is not limited to the pixel circuit shown in
Still referring to
Unlike the embodiments shown in
In this way, since the second initialization signal transmitted by the second initialization signal line Vref2 does not affect the cross-voltage of the light-emitting element, the second initialization signal line Vref2 is electrically connected to the second initialization modules 703 of the pixel circuits in a plurality of partitions F, which may be beneficial for the wiring of the second initialization signal line Vref2.
Based on the display panel according to the above embodiments, accordingly, the embodiments of the present application further provide a specific implementation of a method for driving a display panel. The method for driving a display panel may be applied to the display panel 10 according to the above embodiments, and reference is made to the following embodiments.
S1001: providing different first initialization signals to the first electrodes of the light-emitting elements in at least two of the partitions through at least two first initialization signal lines; and
S1002: providing different first power supply voltage signals to the second electrodes of the light-emitting elements in at least two of the partitions through at least two first power supply voltage signal lines.
Reference is made to the above description for the specific implementation of S1001 and S1002, which will not be repeated herein.
In the method for driving a display panel according to the embodiments of the present application, both the first initialization signal line and the first power supply voltage signal line are arranged independently for the partitions, and the voltage value of the first initialization signal of each partition may be set independently according to the voltage value of the first power supply voltage signal of each partition and the initial cross-voltage value corresponding to each partition, and an appropriate initial cross-voltage value for the light-emitting element in each partition can be obtained according to the change in the first power supply voltage signal transmitted by the first power supply voltage signal line, which is beneficial for reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions.
S1101: acquiring, for any i-th partition in the display panel, a voltage value of the first power supply voltage signal provided to the i-th partition and a preset initial cross-voltage value, and i being a positive integer.
S1102: determining, according to the voltage value of the first power supply voltage signal corresponding to the i-th partition and the preset initial cross-voltage value, a voltage value of the first initialization signal transmitted by the first initialization signal line correspondingly connected to the i-th partition.
Herein, the initial cross-voltage value is a voltage difference between the voltage value of the first initialization signal and the voltage value of the first power supply voltage signal
For example, the voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the i-th partition may be calculated according to the following equation:
Herein, Vint represents the voltage value of the first initialization signal transmitted by the first initialization signal line Vref correspondingly connected to the i-th partition, A represents the preset initial cross-voltage value, and ELVSS' represents the voltage value of the first power supply voltage signal corresponding to the i-th partition.
Herein, the initial cross-voltage value A may be preset, and the specific value of the initial cross-voltage value A may be adjusted flexibly according to actual situations, such as according to the quality of the displayed image (such as the brightness or the chroma uniformity), which is not limited in the embodiments of the present application. After the voltage value ELVSS' of the first power supply voltage signal is determined, the voltage value Vint of the first initialization signal may be determined.
S1103: providing, based on the determined voltage value of the first initialization signal transmitted by the first initialization signal line correspondingly connected to the i-th partition, the first initialization signal with the determined voltage value to the first initialization signal line correspondingly connected to the i-th partition.
According to some embodiments of the present application, optionally, S1101 (acquiring the voltage value of the first power supply voltage signal provided to the i-th partition) may specifically include the following step one and step two.
Step one: acquiring a target brightness of a sub-image to be displayed by the i-th partition, and the target brightness including an average brightness or a maximum brightness.
The gray scale to be displayed by each sub-pixel in the i-th partition is known, and accordingly, the brightness to be displayed by each sub-pixel in the i-th partition may be determined. For example, there are N sub-pixels in the i-th partition, and in step one, the average of the brightness to be displayed by the N sub-pixels may be calculated or the maximum one of the brightness to be displayed by the N sub-pixels may be selected, as the target brightness of the sub-image to be displayed by the i-th partition.
Step two: determining, according to a current brightness interval in which the target brightness is located and a first correspondence relationship between the brightness interval and the voltage value of the first power supply voltage signal, the target voltage value of the first power supply voltage signal corresponding to the current brightness interval.
The first correspondence relationship between the brightness interval and the voltage value of the first power supply voltage signal may be predetermined, in which different brightness intervals may correspond to different voltage values of the first power supply voltage signals to reduce power consumption. The target voltage value of the first power supply voltage signal corresponding to the current brightness interval may be determined according to the current brightness interval in which the target brightness is located and the first correspondence relationship.
In this way, according to the actual brightness to be displayed by each partition, the voltage value of the first power supply voltage signal received by each partition may be adjusted flexibly, which is beneficial for reducing power consumption.
According to some embodiments of the present application, optionally, the display brightness range of the partitions may be divided into a plurality of different brightness intervals, and different partitions may be in different brightness intervals when a complex image is displayed. In order to reduce the initial cross-voltage difference for the light-emitting elements in different partitions as much as possible, optionally, different brightness intervals may correspond to the same initial cross-voltage value. For example, the display brightness range of the partitions is 0 to 1000nit, which may be divided into a plurality of different brightness intervals. For example, 0 to 100nit forms one brightness interval, 101 to 200nit forms one brightness interval, . . . , and 901 to 1000nit forms one brightness interval. Different brightness intervals may correspond to the same initial cross-voltage value, that is, the brightness interval 0 to 100nit corresponds to an initial cross-voltage value A, the brightness interval 101 to 200nit also corresponds to the initial cross-voltage value A, . . . , and the brightness interval 901 to 1000nit also corresponds to the initial cross-voltage value A.
When the partitions are in different brightness intervals, the voltage value Vint of the first initialization signal may be calculated using the same initial cross-voltage value A.
The specific implementation of the steps in the method for driving a display panel shown in
Based on the display panel according to the above embodiments, accordingly, the embodiments of the present application further provide a driving module. The driving module may be electrically connected to the display panel 10 according to the above embodiments, and reference is made to the following embodiments. Exemplarily, the driving module includes, but is not limited to, a display driving chip or a power supply chip.
Specifically, the voltage value of the first power supply voltage signal provided by the driving module 1200 to each partition is known, and the preset initial cross-voltage value is also known. Therefore, for any i-th partition, the voltage value of the first initialization signal transmitted by the first initialization signal line correspondingly connected to the i-th partition may be determined according to the voltage value of the first power supply voltage signal corresponding to the i-th partition and the preset initial cross-voltage value.
In the driving module according to the embodiments of the present application, the voltage value of the first initialization signal of each partition may be set independently according to the voltage value of the first power supply voltage signal of each partition and the preset initial cross-voltage value, so as to ensure that the light-emitting elements in the partitions may obtain the same or similar initial cross-voltage value, which is beneficial for reducing the initial cross-voltage value difference and the brightness difference for the light-emitting elements in different partitions.
In some embodiments, the acquisition unit 1201 is specifically configured to: acquire a target brightness of a sub-image to be displayed by the i-th partition, and the target brightness including an average brightness or a maximum brightness; and determine, according to a current brightness interval in which the target brightness is located and a first correspondence relationship between the brightness interval and the voltage value of the first power supply voltage signal, the target voltage value of the first power supply voltage signal corresponding to the current brightness interval.
Based on the display panel or the driving module according to the above embodiments, accordingly, the embodiments of the present application further provide a display apparatus including the display panel or the driving module according to the present application. Referring to
It should be understood that the specific structures of the circuit and the cross-sectional structures of the display panel provided in the accompanying drawings of the embodiments of the present application are only examples, and are not intended to limit the present application. In addition, the above embodiments of present application may be combined without conflict.
It should be noted that various embodiments in the present specification are described in a progressive manner, the same or similar parts among various embodiment can refer to each other, and each of the embodiment focuses on the differences with other embodiments. The above embodiments of the present application do not exhaustively describe all the details and do not limit the present application to only the specific embodiments described. Obviously, many modifications and variations can be made based on the above description. These embodiments are selected and specifically described in the description to better explain the principles and practical applications of the present application, so that those skilled in the art can make good use of the present application and make modifications based on the present application. The present application is limited only by the claims, along with their full scope and equivalents.
Those skilled in the art can understand that all the above embodiments are exemplary and not limiting. Different technical features in different embodiments can be combined to achieve beneficial effects. Those skilled in the art can understand and implement other variations of the disclosed embodiments after studying the accompanying drawings, the specification and claims. In the claims, the term “comprise” does not exclude other structures; the number relates to “a” but does not exclude more than one; and the terms “first”, “second” are used to designate names rather than to indicate any particular order. Any reference numeral in the claims should not be construed as limiting the scope of protection. The presence of certain technical features in different dependent claims does not indicate that these technical features cannot be combined to achieve beneficial effects.
| Number | Date | Country | Kind |
|---|---|---|---|
| 202310731471.9 | Jun 2023 | CN | national |
The present application is a continuation application of International Application No. PCT/CN2024/077353, filed on Feb. 18, 2024, which claims priority to Chinese Patent Application No. 202310731471.9 filed on Jun. 16, 2023, both of which are incorporated herein by reference in their entireties.
| Number | Date | Country | |
|---|---|---|---|
| Parent | PCT/CN2024/077353 | Feb 2024 | WO |
| Child | 18663377 | US |
