Display panel driving method and driving device

Abstract

The present application discloses a display panel driving method and a driving device, the driving method including the steps of: receiving a video signal transmitted by an external processor; transmitting a first scanning signal to pixels of a current row of the display panel when a first gray scale value of the pixels of the current row of the display panel corresponding to the video signal is greater than a predetermined gray scale value; transmitting a second scanning signal to pixels of a next row of the display panel; and transmitting a data signal to the display panel based on the first gray scale value to drive the display panel to display the video signal, the first scanning signal being at a high level in a scanning period of the current row and having a high level of a first time duration in a scanning period of the next row, the second scanning signal being at a high level in a scanning period of the next row, the data signal being at a low level of a second time duration in the scanning period of the current row, and the sum of the first time duration plus the second time duration corresponding to the first gray scale value. According to the above embodiment, the present application can improve the image quality of high gray scale display by improving the refresh rate of high gray scale display.

Description

[Technical Field]

[0001] The present application relates to the technical field of display panels, and in particular to a driving method and device for a display panel. [Background technology]

[0002] As the spacing between pixels in a display panel becomes smaller, the requirements for row drivers in light-emitting diode (LED) display screens become increasingly stringent, ranging from simple P-MOSFET (p-type field-effect transistor) row switching to more highly integrated and powerful multi-function row drivers. For example, when the data signal Row(n+1) of one of the control rows is low, the voltage on the row line, i.e., the anode voltage of the LED lamp located in this control row, becomes high, and the column data Out(m), i.e., the voltage on the cathode of the LED lamp, is displayed. Furthermore, the brightness of the LED lamp can be obtained according to the width of the waveform of the low voltage Out(m).

[0003] The width of the low-voltage waveform of Out(m) is specifically controlled by a pulse width modulation (PWM) signal corresponding to a GCLK (global clock) signal. This PWM signal specifically corresponds to the gradation of the display frame. For example, one GCLK period represents the pulse width of gradation 1, two GCLK periods represent the pulse width of gradation 2, and three GCLK periods represent the pulse width of gradation 3. In other words, the pulse width of gradation 2 is twice that of gradation 1, and that of gradation 3 is three times that of gradation 1. In an architecture that performs gradation using PWM, the gradation is related only to the GCLK, and the number of GCLKs in one row is the upper limit of the gradation. Meanwhile, the refresh rate is defined as the number of times the LED lamp turns on / off per second. For example, turning on / off m times per second → pulse width appears m times → refresh rate mHz. In the case of high gray scale, Out(m) expressed by PWM becomes wider, i.e., the higher the brightness, the wider the PWM width needs to be, and adding scattering function increases the refresh rate several times.In addition, when analyzing the application scenarios of LED displays, high gray scale applications are usually more common, and most of them are large outdoor screens, so the viewing distance is much longer than indoors at home, and increasing the refresh rate helps improve the display image quality.

[0004] However, in high gradation display, for example, if the gradation value is larger than the scattering number, the refresh rate is fixed and cannot be increased again, which limits the display panel's ability to continue to improve the display effect at high gradation. Summary of the Invention [Problem to be solved by the invention]

[0005] The present application provides a method and device for driving a display panel, which solves the problem of the prior art that when the display panel displays high gradation, the refresh rate cannot be effectively improved, thereby limiting the improvement of the high gradation display effect of the display panel. [Means for solving the problem]

[0006] In order to solve the above technical problems, one technical solution adopted by the present application is as follows: A method for driving a display panel including a plurality of pixels arranged in an array, comprising: receiving a video signal transmitted by an external processor; transmitting a first scanning signal to pixels in a current row of the display panel in response to a first gray scale value of the pixels in the current row of the display panel corresponding to the video signal being greater than a predetermined gray scale value; transmitting a second scanning signal to pixels in a next row of the display panel; and transmitting a data signal to the display panel based on the first gray scale value to drive the display panel to display the video signal, wherein the first scanning signal is at a high level in a scanning period of the current row and has a high level with a first duration in a scanning period of the next row, the second scanning signal is at a high level in the scanning period of the next row, and the data signal has a low level with a second duration in the scanning period of the current row, and a sum of the first duration plus the second duration corresponds to the first gray scale value.

[0007] The step of sending a second scanning signal to pixels in a next row of the display panel includes a step of sending the second scanning signal to pixels in a next row in response to a second gray scale value of the pixels in the next row corresponding to the video signal being greater than a predetermined gray scale value; the step of sending a data signal to the display panel based on the first gray scale value to drive the display panel to display the video signal includes a step of sending a data signal to the display panel based on the first gray scale value and the second gray scale value to drive the display panel to display the video signal; the second scanning signal has a high level with a third time width in a scanning period of the current row, and the data signal has a low level with a fourth time width in a scanning period of the next row, the third time width being smaller than the second time width, and a sum of the third time width and the fourth time width corresponds to the second gray scale value.

[0008] The first time span is smaller than the fourth time span.

[0009] The second time duration corresponds to the first grayscale value.

[0010] After the step of sending a second scanning signal to the pixels in the next row in response to the second gradation value of the pixels in the next row corresponding to the video signal being greater than the predetermined gradation value, and before the step of driving the display panel to display the video signal by sending a data signal to the display panel based on the first gradation value and the second gradation value, the method further includes the step of sending a third scanning signal to the pixels in the next row of the display panel, wherein the second scanning signal has a high level for a fifth time width in the scanning period of the next row, and the sum of the third time width plus the fourth time width and the fifth time width corresponds to the second gradation value.

[0011] After the step of receiving a video signal transmitted by the external processor and before the step of transmitting first scanning signals to the pixels of the current row of the display panel in response to the first gray scale value of the pixels of the current row of the display panel corresponding to the video signal being greater than the predetermined gray scale value, the method further includes the step of receiving first level signals and second level signals transmitted by the processor, and the step of transmitting first scanning signals to the pixels of the current row in response to the first gray scale value of the pixels of the current row of the display panel corresponding to the video signal being greater than the predetermined gray scale value includes the step of transmitting the first scanning signals to the pixels of the current row in response to neither the first level signal nor the second level signal being 0.

[0012] The step of transmitting a first scanning signal to pixels in the current row in response to neither the first level signal nor the second level signal being 0 includes the step of determining that neither the digital signals corresponding to the first level signal nor the second level signal are 0, respectively, in response to neither the first level signal nor the second level signal being high level, and transmitting the first scanning signal to pixels in the current row.

[0013] After the step of receiving the video signal transmitted by the external processor and before the step of transmitting a first scanning signal to the pixels of the current row of the display panel in response to the first gray scale value of the pixels of the current row of the display panel corresponding to the video signal being greater than the predetermined gray scale value, the step of analyzing the video signal to obtain the first gray scale value of the pixels of the current row of the display panel corresponding to the video signal is further included.

[0014] The step of driving the display panel to display the video signal by sending a data signal to the display panel based on the first gradation value includes the steps of generating a pulse-modulated signal based on the first gradation value, and driving the display panel to display the video signal by sending a data signal to the display panel in accordance with the pulse-modulated signal.

[0015] The display panel receives the pulse-modulated signal sent by the processor, and sends a data signal to the display panel in response to the pulse-modulated signal, thereby driving the display panel to display the video signal.

[0016] The step of driving the display panel to display the video signal by transmitting a data signal to the display panel in accordance with the pulse modulation signal includes the steps of determining a transmission method for the high level or low level state of the data signal in accordance with the pulse modulation signal, transmitting the data signal to the display panel according to the transmission method, and driving the display panel to display the video signal.

[0017] The first time width is smaller than the pulse of the pulse modulated signal.

[0018] The first time duration is a time duration corresponding to a gradation value of 1.

[0019] The predetermined gradation value is 32 or 64.

[0020] In order to solve the above technical problem, another technical solution adopted by the present application is as follows: A driving device for a display panel including a plurality of pixels arranged in an array, comprising: a control unit coupled to the external processor, for receiving the video signal sent by the external processor, and for generating a first control signal in response to a first gray scale value of a pixel in a current row of the display panel corresponding to the video signal being greater than a predetermined gray scale value; a driving unit coupled to the control unit and the external display panel, for receiving the first control signal and the first gray scale value sent by the control unit, sending a first scanning signal to pixels in a current row according to the first control signal, sending a second scanning signal to pixels in a next row of the display panel, and sending a data signal to the display panel according to the first gray scale value, thereby driving the display panel to display the video signal; The present invention provides a driving device for a display panel, in which a first scanning signal is at a high level in a current row scanning period and has a high level for a first time duration in a next row scanning period, a second scanning signal is at a high level in the next row scanning period, and a data signal has a low level for a second time duration in a current row scanning period, and the sum of the first time duration plus the second time duration corresponds to a first gray scale value.

[0021] When the control unit determines that the second gradation value of the pixel in the next row corresponding to the video signal is greater than the predetermined gradation value, it generates a second control signal, and the driving unit sends the second control signal and the second gradation value to the driving unit, which sends the first scanning signal to the pixel in the current row based on the second control signal, sends the second scanning signal to the pixel in the next row based on the second control signal, and sends the data signal to the display panel based on the first gradation value and the second gradation value, thereby driving the display panel to display the video signal, wherein the second scanning signal has a high level with a third time width in the scanning period of the current row, and the data signal has a low level with a fourth time width in the scanning period of the next row, the third time width is smaller than the second time width, and the sum of the third time width plus the fourth time width corresponds to the second gradation value.

[0022] When the driving unit receives the first gray scale value transmitted by the control unit, the driving unit generates a pulse modulation signal based on the first gray scale value, and transmits a data signal to the display panel according to the pulse modulation signal.

[0023] The control unit further includes a timing controller and a brightness detection unit coupled to each other, and the driving unit further includes a row driving unit and a column driving unit coupled to the timing controller, and the brightness detection unit is coupled to the processor to receive the video signal sent by the processor, and when it detects that the gray scale corresponding to the video signal is not 0, it sends a first level signal to the timing controller, and when the timing controller receives the first level signal, the row driving unit sends a first scanning signal to the pixels of the current row of the display panel and a second scanning signal to the pixels of the next row of the display panel, and the column driving unit sends a second level signal and a third level signal to the row driving unit and the column driving unit respectively to send a data signal to the display panel.

[0024] The first time duration is a time duration corresponding to a gradation value of 1.

[0025] To solve the above technical problems, the present application provides a further technical solution as follows: A display device includes a display panel and a driving device according to any one of claims 1 to 5, wherein the driving device is coupled to the display panel and drives the light-emitting units of the display panel to emit light. [Effects of the Invention]

[0026] The beneficial effects of the present application are as follows: Different from the prior art, the driving method of the present application receives a video signal sent by an external processor, and in response to a first gray scale value of a pixel in a current row of a display panel corresponding to the video signal being greater than a predetermined gray scale value, sends a first scanning signal to the pixel in the current row and a second scanning signal to the pixel in the next row of the display panel, and sends a data signal to the display panel according to the first gray scale value to drive the display panel to display the video signal, wherein the first scanning signal is at a high level in a scanning period of the current row and at a high level of a first time duration in a scanning period of the next row; the first scanning signal has a high level in the scanning period of the next row; the data signal has a low level of a second time duration in the scanning period of the current row; the sum of the first time duration plus the second time duration corresponds to the first gray scale value; thereby, the gray scale modulation pulse corresponding to the data signal is divided into two parts to light up pixels corresponding to the scanning period of the current row and the scanning period of the next row, respectively, thereby effectively improving the refresh rate in high gray scale display scenarios, i.e., gray scales greater than a predetermined value, and thereby effectively improving the image quality of high gray scale display. [Brief explanation of the drawings]

[0027] In order to more clearly describe the technical solutions of the embodiments of the present application, the following will briefly describe the drawings necessary for describing the embodiments. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings based on these drawings without any creative efforts. [Figure 1] 1 is a flow chart illustrating a first embodiment of a method for driving a display panel according to the present invention. [Figure 2] 2 is a schematic diagram of signal waveforms corresponding to one specific application scenario of the driving method for the display panel in FIG. 1; [Figure 3] 2 is a schematic flow diagram of a specific embodiment corresponding to S14 in FIG. 1. [Figure 4] 10 is a flow chart illustrating a second embodiment of a method for driving a display panel according to the present invention. [Figure 5]5 is a schematic diagram of signal waveforms corresponding to one specific application scenario of the driving method for the display panel in FIG. 4; FIG. [Figure 6] 5 is a schematic diagram of signal waveforms corresponding to another specific application scenario of the driving method for the display panel in FIG. 4. [Figure 7] 5 is a schematic diagram of signal waveforms corresponding to further specific application scenarios of the display panel driving method in FIG. 4. [Figure 8] 10 is a flow chart illustrating a third embodiment of a method for driving a display panel according to the present invention. [Figure 9] 1 is a structural schematic diagram of a first embodiment of a driving device for a display panel of the present invention; [Figure 10] 10 is a structural schematic diagram of a second embodiment of a driving device for a display panel of the present invention; [Figure 11] 1 is a structural schematic diagram of an embodiment of a display device of the present application; DETAILED DESCRIPTION OF THE INVENTION

[0028] To make the technical problems solved, the technical solutions adopted, and the technical effects achieved in the present application clearer, the following will further describe in detail the technical solutions of the embodiments of the present application with reference to the drawings.

[0029] The term "embodiment" as used herein means that a particular feature, structure, or characteristic described with reference to the embodiment may be included in at least one embodiment of the present application. The appearance of this phrase in various places throughout the specification does not necessarily refer to the same embodiment, nor does it imply mutually exclusive, independent, or alternative embodiments with respect to other embodiments. As those skilled in the art will understand, both explicitly and implicitly, the embodiments described herein may be combined with other embodiments.

[0030] As shown in Fig. 1, Fig. 1 is a flow diagram of a first embodiment of the display panel driving method of the present invention, which includes steps S11 to S14. S11: Receive the video signal sent by the external processor. The driving method in this embodiment can be specifically understood as a method of driving the light-emitting units of the display panel by the driving assembly, so that the light-emitting units display corresponding video signals sent to the driving assembly by the processor. Specifically, the display panel includes a plurality of pixels arranged in an array, i.e., multiple rows of pixels, and when the drive assembly receives a video signal transmitted by an external processor, it transmits a drive signal corresponding to each pixel among the pixels by emitting light, thereby displaying the video signal. The processor specifically refers to the central processor of the external display device corresponding to the display panel. S12: In response to the first gray scale value of the pixel in the current row of the display panel corresponding to the video signal being greater than the predetermined gray scale value, send a first scanning signal to the pixel in the current row. It can be understood that when the drive assembly receives the video signal transmitted by the processor, it can analyze the video signal to determine the gray scale to be displayed for each pixel of the display panel to which the video signal corresponds. In this embodiment, the driving assembly sends a first scanning signal to the pixels in the current row when it determines that the first gray scale value of the pixels in the current row of the display panel corresponding to the currently received video signal is greater than a predetermined gray scale value. The pixels of the current row specifically refer to the pixels of the row being scanned at the current time, and may be pixels of any row of the display panel. The predetermined gradation value specifically corresponds to the scattering order of the pulse-modulated signal preset by the driving assembly, and specifically may be any reasonable number such as 32 or 64, and the present application is not limited thereto. S13: A second scanning signal is transmitted to the pixels in the next row of the display panel. Additionally, the drive assembly continues to send second scan signals to the next row of pixels of the display panel. S14: Send a data signal to the display panel based on the first grayscale value to drive the display panel to display the video signal. It can be understood that after the driving assembly determines the gray scale to be displayed for each pixel in the display panel corresponding to the video signal, it can analyze and obtain a pulse-modulated signal corresponding to the data signal to be transmitted to each column of pixels, or directly receive a pulse-modulated signal transmitted by an external processor. Gray scale 1 corresponds to one GCLK cycle, gray scale 2 corresponds to two GCLK cycles, and gray scale 3 corresponds to three GCLK cycles. By analogy, once the first gray scale value is determined, a pulse-modulated signal corresponding to the data signal to be transmitted can be obtained.

[0031] Specifically, after determining the first gray scale value of the pixel in the current row, the driving assembly analyzes and obtains the pulse modulation signal, and determines the transmission method of the high voltage level and low voltage level state of the data signal according to the pulse modulation signal, and sends the data signal to the display panel to drive the display panel to display the video signal.

[0032] For ease of understanding, an example will be described in which the first gray scale value is greater than the predetermined gray scale value, and the pulse of the corresponding pulse modulation signal is Ts1, and the second gray scale value of the pixel in the next row of the display panel to which the video signal corresponds is less than the predetermined gray scale value, and the pulse of the corresponding pulse modulation signal is Ts2. As shown in FIG. 2, FIG. 2 is a schematic diagram of signal waveforms corresponding to one specific application scenario of the display panel driving method in FIG. 1, where Scan1 in FIG. 2 is a waveform diagram of the first scanning signal, Scan2 is a waveform diagram of the second scanning signal, Scan3 is a waveform diagram of the third scanning signal that the driving device sends to the pixel in the next row, S1 is a waveform diagram of the data signal that the driving device sends to the display panel in a normal form, and S1' is a waveform diagram of the data signal that is sent to the display panel based on the first gray scale value in this embodiment.

[0033] From the above, the first scanning signal is at a high level in the current row scanning period Ta1 and has a high level for a first time duration T1 in the next row scanning period Ta2, the second scanning signal is at a high level in the next row scanning period Ta2, the data signal has a low level for a second time duration T2 in the current row scanning period Ta1, and the sum of the first time duration T1 plus the second time duration T2 corresponds to the first gray scale value, that is, T1+T2=Ts1.

[0034] Here, the first time duration T1 may specifically be a time duration corresponding to a gray scale value of 1, that is, a pulse width of one global clock. In other embodiments, the first time duration T1 may be any reasonable time duration smaller than the pulse Ts2 of the pulse modulation signal, and the present application is not limited thereto.

[0035] The pulse modulation signal Ts1 corresponding to the first gray scale value is divided into two parts, and the pixels of the current row are turned on in the current row scanning period Ta1 and the next row scanning period Ta2, respectively, thereby increasing the refresh rate corresponding to the pixels of the current row by one time and achieving the purpose of increasing the refresh rate.

[0036] In the above embodiment, the gray scale modulation pulse corresponding to the data signal is divided into two parts, and pixels corresponding to the current row scanning period and the next row scanning period are respectively turned on, thereby effectively increasing the gray scale, i.e., the refresh rate in a display scenario greater than a predetermined gray scale value, thereby effectively improving the image quality of high gray scale display.

[0037] Furthermore, in one embodiment, after the above S11 and before S12, the method further includes the step of analyzing the video signal to obtain a first gray scale value of the pixel of the current row of the display panel to which the video signal corresponds.

[0038] It can be understood that the driving assembly of the display panel, after obtaining the video signal, specifically obtains the first gray scale value of the pixel of the current row by analyzing the video signal.

[0039] As shown in Fig. 3, Fig. 3 is a schematic flow diagram of one specific embodiment corresponding to S14 in Fig. 1. In one embodiment, the above S14 may specifically further include the following steps S141 and S142. S141: A pulse modulation signal is generated based on the first gradation value. It can be understood that once the driving assembly determines the gray scale to be displayed for each pixel in the display panel corresponding to the video signal, it can analyze and obtain a pulse-modulated signal corresponding to the data signal sent to the pixels in each column. Here, gradation 1 corresponds to one GCLK cycle, gradation 2 corresponds to two GCLK cycles, and gradation 3 corresponds to three GCLK cycles. By analogy, once the first gradation value is determined, a pulse-modulated signal corresponding to the data signal to be transmitted is obtained. S142: Send a data signal to the display panel according to the pulse modulation signal to drive the display panel to display the video signal. Furthermore, the transmission method for the high-voltage level or low-voltage level state of the data signal is determined according to the pulse modulation signal, and the data signal is sent to the display panel using this transmission method, and the high-level or low-level state corresponding to the data signal is given, thereby driving the display panel to display the video signal.

[0040] In another embodiment, the above step S141 may be specifically replaced by receiving a pulse modulated signal transmitted by the processor.

[0041] It can be understood that the processing process of analyzing the pulse modulated signal from the first gray scale value may be integrated into a processor in order to effectively reduce the amount of data to be calculated and processed by the driving assembly and improve the processing efficiency of the display panel.

[0042] As shown in Fig. 4, Fig. 4 is a flow diagram of a second embodiment of the display panel driving method of the present invention. The display panel driving method of this embodiment is a detailed flow diagram of the example of the display panel driving method in Fig. 1, and includes the following steps S21 to S24. S21: Receive the video signal sent by the external processor. S22: In response to the first gray scale value of the pixel in the current row of the display panel corresponding to the video signal being greater than the predetermined gray scale value, send a first scanning signal to the pixel in the current row. S21 and S22 are the same as S11 and S12 in FIG. 1, and for specific details, please refer to S11 and S12 and the descriptions related thereto, and will not be described in detail here. S23: In response to the second grayscale value of the pixels in the next row corresponding to the video signal being greater than the predetermined grayscale value, a second scanning signal is transmitted to the pixels in the next row. When the driving assembly determines that the second gray scale value of the pixel in the next row corresponding to the currently received video signal is also greater than the predetermined gray scale value, it sends a second scanning signal to the pixel in the next row, and at this time, it can be understood that the second scanning signal corresponds to a high level of a pulse that also corresponds to the current row scanning period. S24: Send a data signal to the display panel based on the first grayscale value and the second grayscale value to drive the display panel to display the video signal.

[0043] Furthermore, the driving assembly specifically sends a data signal to the display panel based on the first gray scale value and the second gray scale value, thereby driving the display panel to display the video signal.

[0044] For ease of understanding, this embodiment will be described by taking as an example a case where the first gray scale value is greater than the predetermined gray scale value, the pulse of the corresponding gray scale pulse modulation signal is Ts1, and the second gray scale value of the pixel in the next row of the display panel corresponding to the video signal is also greater than the predetermined gray scale value, the pulse of the corresponding gray scale pulse modulation signal is Ts2. As shown in Figure 5, Figure 5 is a schematic diagram of signal waveforms corresponding to a specific application scenario of the display panel driving method in Figure 4. In this case, Scan1 in Figure 5 is a waveform diagram of the first scan signal, Scan2 is a waveform diagram of the second scan signal, Scan3 is a waveform diagram of the third scan signal sent by the driver to the pixel in the next row, S1 is a waveform diagram of the data signal sent by the driver to the display panel in a normal form, and S1' is a waveform diagram of the data signal sent to the display panel based on the first gray scale value in this embodiment.

[0045] From the above, the second scanning signal also has a high level for a third time duration T3 in the current row scanning period Ta1, and the data signal has a low level for a fourth time duration T4 in the next row scanning period Ta2, where the third time duration T3 is smaller than the second time duration T2, and the sum of the third time duration T3 plus the fourth time duration T4 corresponds to the second gray level value, that is, T3 + T4 = Ts2.

[0046] Furthermore, in this embodiment, the first time duration T1 is also smaller than the fourth time duration T4.

[0047] Furthermore, in another specific embodiment, if the first gray scale value is smaller than the predetermined gray scale value and the pulse of the corresponding gray scale pulse modulation signal is Ts1, and the second gray scale value of the pixel in the next row of the display panel to which the video signal corresponds is smaller than the predetermined gray scale value and the pulse of the corresponding gray scale pulse modulation signal is Ts2, as shown in FIG. 6, which is a schematic diagram of the signal waveform corresponding to another specific application scenario of the display panel driving method in FIG. 4, in this case, the sum of the third time duration T3 plus the fourth time duration T4 corresponds to the second gray scale value, that is, T3+T4=Ts2.

[0048] Furthermore, the second time duration T2 corresponds to the first grayscale value, ie, T2=Ts1, and the third time duration T3 is smaller than the second time duration T2.

[0049] Furthermore, in one embodiment, the method may further include, after the above S23 and before S24, specifically, a step of transmitting a third scan signal to pixels in a next row of the display panel.

[0050] In one embodiment, when the first gray scale value is greater than the predetermined gray scale value, and the pulse of the corresponding gray scale pulse modulation signal is Ts1, the second gray scale value of the pixel in the next row of the display panel to which the video signal corresponds is also greater than the predetermined gray scale value, and the pulse of the corresponding gray scale pulse modulation signal is Ts2, while the third gray scale value of the pixel in the next row of the display panel is smaller than the predetermined gray scale value, and the pulse of the corresponding gray scale pulse modulation signal is Ts3, as shown in FIG. 7. FIG. 7 is a schematic diagram of signal waveforms corresponding to a more specific application scenario of the display panel driving method in FIG. 4. In this case, it can be understood that the second scanning signal has a high level with a fifth time duration T5 in the next row scanning period Ta3, and the sum of the third time duration T3 plus the fourth time duration T4 and the fifth time duration T5 corresponds to the second gray scale value, that is, T3+T4+T5=Ts2.

[0051] Furthermore, the sum of the first time duration T1 plus the second time duration T2 corresponds to the first gradation value, that is, T1+T2=Ts1, and the third time duration T3 is smaller than the second time duration T2.

[0052] 8, which is a flow diagram of a third embodiment of the display panel driving method of the present invention. The display panel driving method of this embodiment is a detailed flow diagram of the example of the display panel driving method in FIG. 1, and includes the following steps S31 to S35. S31: Receive the video signal sent by the external processor. S31 is the same as S11 in FIG. 1, and for specific details, please refer to S11 and related descriptions, and will not be described in detail here. S32: Receive the first level signal and the second level signal sent by the processor. Specifically, the drive control signal may use the logic level signal received and transmitted by the processor as a precondition for determining whether the first gray scale value of the pixel in the current row of the display panel to which the currently received video signal corresponds is greater than the predetermined gray scale value. For example, it can be understood that if the received first level signal and second level signal are both 1, it is determined that the first gray scale value of the pixel in the current row of the display panel to which the currently received video signal corresponds is greater than the predetermined gray scale value, and if the received first level signal and second level signal are both 0, it is determined that the first gray scale value of the pixel in the current row of the display panel to which the currently received video signal corresponds is less than the predetermined gray scale value. S33: In response to the first level signal and the second level signal both being non-zero, send a first scan signal to the pixels of the current row. Specifically, if it is determined that neither the first level signal nor the second level signal is 0, it is determined that the first gradation value of the pixel in the current row of the display panel corresponding to the currently received video signal is greater than the predetermined gradation value, and therefore it is necessary to send a first scanning signal to the pixel in the current row. Furthermore, the first scanning signal is at a high level in the current row scanning period Ta1 and has a high level for a first time duration T1 in the next row scanning period Ta2, the second scanning signal is at a high level in the next row scanning period Ta2, and the data signal has a low level for a second time duration T2 in the current row scanning period Ta1, and the sum of the first time duration T1 plus the second time duration T2 corresponds to the first gray scale value, that is, T1+T2=Ts1. In other embodiments, the first level signal and the second level signal may be determined as high level and low level, respectively, instead of logic 1 and 0, or specifically converted into a digital signal 1 or 0, and the driving assembly may make a corresponding logic determination based on the digital signal. Furthermore, the first level signal and the second level signal may be sent by the control unit of the driving assembly to its driving unit, and the driving unit may send a first scanning signal and a subsequent second scanning signal and a data signal, and the present application is not limited thereto. S34: A second scanning signal is transmitted to the pixels in the next row of the display panel. S35: A data signal is sent to the display panel based on the first grayscale value, thereby driving the display panel to display the video signal.

[0053] S34 and S35 are the same as S13 and S14 in FIG. 1, and specifically, S13 and S14 and the related descriptions may be referred to, and will not be described in detail here.

[0054] The present application also provides a driving device for a display panel, as shown in Figure 9, which is a structural schematic diagram of a first embodiment of the driving device for a display panel of the present application. In this embodiment, a display panel 60 includes a plurality of pixels arranged in an array, and the driving device 40 includes a control unit 41 and a driving unit 42.

[0055] The control unit 41 is coupled to the external processor 50 to receive the video signal transmitted by the external processor 50, and generates a first control signal in response to the first gray scale value of the pixel in the current row of the display panel 60 corresponding to the video signal being greater than a predetermined gray scale value.

[0056] Furthermore, the driving unit 42 is coupled to the control unit 41 and the external display panel 60, and upon receiving the first control signal and the first gray scale value sent by the control unit 41, sends a first scanning signal to the pixels of the current row based on the first control signal, sends a second scanning signal to the pixels of the next row of the display panel 60, and sends a data signal to the display panel 60 based on the first gray scale value, thereby driving the display panel 60 to display the video signal.

[0057] The first scanning signal is at a high level during the scanning period of the current row and has a high level for a first time duration during the scanning period of the next row, the second scanning signal is at a high level during the scanning period of the next row, and the data signal has a low level for a second time duration during the scanning period of the current row, and the sum of the first time duration plus the second time duration corresponds to the first gray scale value.

[0058] In one embodiment, when the control unit 41 determines that the second gray scale value of the pixel in the next row corresponding to the video signal is greater than the predetermined gray scale value, the control unit 41 may specifically generate a second control signal, and the driving unit 42 may send a first scanning signal to the pixel in the current row according to the second control signal, send a second scanning signal to the pixel in the next row according to the second control signal, and send the second control signal and the second gray scale value to the driving unit 42, so as to send a data signal to the display panel 60 according to the first gray scale value and the second gray scale value, and drive the display panel 60 to display the video signal; The second scanning signal has a high level with a third time duration in the scanning period of the current row, and the data signal has a low level with a fourth time duration in the scanning period of the next row, the third time duration being smaller than the second time duration, and the sum of the third time duration plus the fourth time duration corresponds to the second gray level value.

[0059] In one embodiment, when the driving unit 42 receives the first gradation value sent by the control unit 41, the driving unit 42 specifically further includes the steps of generating a pulse modulation signal based on the first gradation value and sending a data signal to the display panel according to the pulse modulation signal.

[0060] Optionally, the first duration is a duration corresponding to a gray scale value of one.

[0061] It can be understood that the driving device 40 in this embodiment may also realize any of the other driving methods for the display panel 60 described above according to the gradation value information of the pixels in each row of the display panel 60 to which the video signal corresponds; specifically, reference may be made to Figures 1 to 8 and the related descriptions thereof, and a detailed description will not be given here.

[0062] 10, which is a structural schematic diagram of a second embodiment of a display panel driver of the present invention. The display panel driver of this embodiment differs from the first embodiment of the display panel driver of the present invention in that the control unit 71 of the driver 70 further includes a timing controller 711 and a brightness detection unit 712 coupled to each other, and the driver unit 42 further includes a row driver unit 421 and a column driver unit 422 coupled to the timing controller 711.

[0063] The brightness detection unit 712 is coupled to the processor to receive the video signal sent by the processor. If it detects that the gray scale corresponding to the video signal is not 0, it sends a first level signal to the timing controller 711. When the timing controller 711 receives the first level signal, it sends second level signals and third level signals to the row driving unit 421 and the column driving unit 422 respectively, so that the row driving unit 421 sends a first scanning signal to the pixels in the current row of the display panel and a second scanning signal to the pixels in the next row of the display panel, and the column driving unit 422 sends a data signal to the display panel.

[0064] In this embodiment, the first level signal is specifically a logic 0 level signal or a low level signal, while the second level signal and the third level signal are logic 1 level signals or high level signals.

[0065] As shown in FIG. 11, FIG. 11 is a structural schematic diagram of one embodiment of the display device of the present application.

[0066] In this embodiment, the display device 80 specifically includes a display panel 81 and a driving device 82, and the driving device 82 is coupled to the display panel 81 to drive the light-emitting units of the display panel 81 to emit light.

[0067] The drive device 82 described in this embodiment is the drive device 40 or the drive device 70 described in any of the above examples, and will not be described in detail here.

[0068] The beneficial effects of the present application are as follows: Different from the prior art, the driving method of the present application receives a video signal sent by an external processor, and in response to a first gray scale value of a pixel in a current row of a display panel corresponding to the video signal being greater than a predetermined gray scale value, sends a first scanning signal to the pixel in the current row and a second scanning signal to the pixel in the next row of the display panel, and sends a data signal to the display panel according to the first gray scale value to drive the display panel to display the video signal, wherein the first scanning signal is at a high level in a scanning period of the current row and at a high level of a first time duration in a scanning period of the next row; the first scanning signal has a high level in the scanning period of the next row; the data signal has a low level of a second time duration in the scanning period of the current row; the sum of the first time duration plus the second time duration corresponds to the first gray scale value; thereby, the gray scale modulation pulse corresponding to the data signal is divided into two parts to light up pixels corresponding to the scanning period of the current row and the scanning period of the next row, respectively, thereby effectively improving the refresh rate in high gray scale display scenarios, i.e., gray scales greater than a predetermined value, and thereby effectively improving the image quality of high gray scale display.

[0069] The above is merely an embodiment of the present application and does not limit the patent scope of the present application. Any conversion of an equivalent structure or equivalent procedure based on the specification and drawings of the present application, or any direct or indirect use in other related technical fields, shall be included in the patent scope of the present application. [Explanation of symbols]

[0070] 40 / 70 / 82 drive unit 41 / 71 Control Unit 42 / 72 drive unit 50 External Processor 60 / 81 Display panel 711 Timing Controller 712 Luminance Detection Unit 721 Line Drive Unit 722 row drive unit 80 Display device

Claims

1. A method for driving a display panel including a plurality of pixels arranged in an array, comprising: receiving a video signal transmitted by an external processor; transmitting a first scanning signal to pixels in a current row of the display panel in response to a first gray scale value of the pixels in the current row of the display panel corresponding to the video signal being greater than a predetermined gray scale value; sending a second scan signal to a next row of pixels of the display panel; sending a data signal to the display panel based on the first grayscale value to drive the display panel to display the video signal; the first scanning signal is at a high level during a scanning period of a current row and has a high level for a first time duration during a scanning period of a next row; the second scanning signal is at a high level during a scanning period of the next row; the data signal has a low level for a second time duration during a scanning period of the current row; and a sum of the first time duration and the second time duration corresponds to the first gray level.

2. the step of transmitting a second scan signal to pixels in a next row of the display panel comprises: transmitting the second scanning signal to the pixels of the next row in response to the second grayscale value of the pixels of the next row corresponding to the video signal being greater than a predetermined grayscale value; the step of driving the display panel to display the video signal by transmitting a data signal to the display panel based on the first grayscale value, transmitting a data signal to the display panel based on the first gray scale value and the second gray scale value to drive the display panel to display the video signal; 2. The driving method of claim 1, wherein the second scanning signal further has a high level of a third time duration in the scanning period of the current row, and the data signal has a low level of a fourth time duration in the scanning period of the next row, the third time duration being smaller than the second time duration, and a sum of the third time duration and the fourth time duration corresponds to the second gray scale value.

3. 3. The driving method according to claim 2, wherein the first time duration is smaller than the fourth time duration.

4. The driving method according to claim 2 , wherein the second time duration corresponds to the first grayscale value.

5. after the step of transmitting the second scanning signal to the pixels of the next row in response to the second gradation value of the pixels of the next row corresponding to the video signal being greater than a predetermined gradation value, and before the step of driving the display panel to display the video signal by transmitting a data signal to the display panel based on the first gradation value and the second gradation value; further comprising transmitting a third scan signal to pixels in a next row of the display panel; 3. The driving method according to claim 2, wherein the second scanning signal further has a high level for a fifth time width in the scanning period of the next row, and the sum of the third time width plus the fourth time width and the fifth time width corresponds to the second gradation value.

6. after the step of receiving a video signal transmitted by an external processor, and before the step of transmitting a first scanning signal to pixels of a current row of the display panel in response to a first grayscale value of the pixels of the current row of the display panel corresponding to the video signal being greater than a predetermined grayscale value; further comprising receiving a first level signal and a second level signal transmitted by the external processor; the step of transmitting a first scanning signal to pixels in a current row of the display panel in response to a first grayscale value of the pixels in the current row of the display panel corresponding to the video signal being greater than a predetermined grayscale value, 2. The driving method according to claim 1, further comprising the step of transmitting the first scan signal to the pixels of the current row in response to neither the first level signal nor the second level signal being 0.

7. the step of transmitting the first scan signal to the pixels of the current row in response to neither the first level signal nor the second level signal being 0, 7. The driving method of claim 6, further comprising: determining that the digital signals corresponding to the first level signal and the second level signal are not both 0 in response to both the first level signal and the second level signal being at a high level, and transmitting the first scan signal to pixels in the current row.

8. after the step of receiving a video signal transmitted by an external processor, and before the step of transmitting a first scanning signal to pixels of a current row of the display panel in response to a first grayscale value of the pixels of the current row of the display panel corresponding to the video signal being greater than a predetermined grayscale value; 2. The driving method according to claim 1, further comprising: analyzing the video signal to obtain a first gray scale value of a pixel in a current row of the display panel to which the video signal corresponds.

9. the step of driving the display panel to display the video signal by transmitting a data signal to the display panel based on the first grayscale value, generating a pulse-modulated signal based on the first gradation value; and transmitting the data signal to the display panel in response to the pulse-modulated signal to drive the display panel to display the video signal.

10. the step of driving the display panel to display the video signal by transmitting a data signal to the display panel based on the first grayscale value, receiving a pulse modulated signal transmitted by the external processor; and transmitting the data signal to the display panel in response to the pulse-modulated signal to drive the display panel to display the video signal.

11. the step of driving the display panel to display the video signal by transmitting the data signal to the display panel in response to the pulse-modulated signal includes:

11. The driving method according to claim 9, further comprising the steps of: determining a transmission method for a high level or low level state of the data signal in accordance with the pulse-modulated signal; transmitting the data signal to the display panel in accordance with the transmission method; and driving the display panel to display the video signal.

12. 11. The driving method according to claim 10, wherein the first time width is smaller than a pulse of the pulse modulated signal.

13. 11. The driving method according to claim 1, wherein the first time duration is a time duration corresponding to a grayscale value of 1.

14. 11. The driving method according to claim 1, wherein the predetermined gradation value is 32 or 64.

15. A drive device for a display panel including a plurality of pixels arranged in an array, a control unit coupled to the external processor, for receiving the video signal sent by the external processor, and for generating a first control signal in response to a first gray scale value of a pixel in a current row of the display panel corresponding to the video signal being greater than a predetermined gray scale value; a driving unit coupled to the control unit and the external display panel, for receiving a first control signal and the first gray scale value sent by the control unit, for sending a first scanning signal to pixels of the current row according to the first control signal, for sending a second scanning signal to pixels of a next row of the display panel, and for sending a data signal to the display panel according to the first gray scale value, thereby driving the display panel to display the video signal; the first scanning signal is at a high level in the current row scanning period and has a high level for a first time duration in the next row scanning period, the second scanning signal is at a high level in the next row scanning period, the data signal has a low level for a second time duration in the current row scanning period, and a sum of the first time duration plus the second time duration corresponds to the first gray level.

16. When the control unit determines that the second gray scale value of the pixel in the next row corresponding to the video signal is greater than the predetermined gray scale value, it generates a second control signal, and the driving unit sends the second control signal and the second gray scale value to the driving unit, so that the driving unit sends first scanning signals to the pixels in the current row based on the second control signal, sends second scanning signals to the pixels in the next row, and sends data signals to the display panel based on the first gray scale value and the second gray scale value, thereby driving the display panel to display the video signal; 16. The driving device of claim 15, wherein the second scanning signal further has a high level of a third time duration in the scanning period of the current row, and the data signal has a low level of a fourth time duration in the scanning period of the next row, the third time duration being smaller than the second time duration, and a sum of the third time duration plus the fourth time duration corresponds to the second gray scale value.

17. 16. The driving device of claim 15, wherein when the driving unit receives the first gradation value transmitted by the control unit, the driving unit generates a pulse modulation signal based on the first gradation value and transmits the data signal to the display panel in accordance with the pulse modulation signal.

18. 16. The driving device of claim 15, wherein the control unit further includes a timing controller and a brightness detection unit coupled to each other, the driving unit further includes a row driving unit and a column driving unit coupled to the timing controller, the brightness detection unit is coupled to the external processor to receive the video signal sent by the external processor, and sends a first level signal to the timing controller when detecting that a gray level corresponding to the video signal is not 0, and the timing controller, upon receiving the first level signal, causes the row driving unit to send a first scan signal to pixels in a current row of the display panel and a second scan signal to pixels in a next row of the display panel, and sends second level signals and third level signals to the row driving unit and the column driving unit, respectively, so that the column driving unit transmits the data signal to the display panel.

19. 19. The driving device according to claim 15, wherein the first time width is a time width corresponding to a grayscale value of 1.

20. A display device, A display device comprising: a display panel; and a drive device according to any one of claims 15 to 18, wherein the drive device is coupled to the display panel and drives light-emitting units of the display panel to emit light.

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