Driving method and driving device of display panel

Abstract

Embodiments of the present application provide a display panel driving method and a driving device. The display panel driving method detects the type of a current display picture, and when the type of the current display picture is a horizontal stripe picture or a checkerboard picture and the number of checkerboards in the checkerboard picture does not exceed a threshold, the pre-charge function is turned off, thereby reducing the power consumption of the display panel.

Description

Technical Field

[0001] This application relates to the field of display technology, and in particular to a driving method and driving device for a display panel. Background Technology

[0002] Currently, for column inversion flip (CIFT) LCD panels, a pre-charge function is used to neutralize the charges of data lines with the same polarity during the standby (STB) state, thereby reducing power consumption when displaying heavy content.

[0003] However, when displaying horizontal stripe (H-stripe) images and some chessboard images, if the voltages of two positive or two negative data lines are the same, shorting the positive channel to the negative channel will not change the voltages of the two positive or two negative data lines. In this case, it does not save power, and shorting the positive channel and the negative channel will increase the power consumption of the display panel itself.

[0004] Therefore, it is necessary to provide a driving method and driving device for a display panel to improve this deficiency. Summary of the Invention

[0005] The embodiments of this application provide a driving method and driving device for a display panel, which can detect the type of heavy-load display and disable the pre-charging function when displaying horizontal stripe images and partial checkerboard images, thereby reducing the power consumption of the display panel.

[0006] Embodiments of this application provide a method for driving a display panel, including:

[0007] Obtain the status of the pre-charging function of the display panel;

[0008] When the pre-charging function is enabled, the type of the current display screen on the display panel is obtained. The type of the display screen includes horizontal stripe screen and checkerboard screen.

[0009] Depending on the type of the currently displayed screen, the pre-charging function is controlled to remain on or off, including:

[0010] If the type of the currently displayed screen is a horizontal stripe screen, or if the type of the currently displayed screen is a checkerboard screen and the number of checkerboard squares in the currently displayed screen is less than or equal to the checkerboard square number threshold, then the pre-charging function is switched from the on state to the off state.

[0011] According to one embodiment of this application, the step of obtaining the state of the pre-charging function of the display panel includes:

[0012] Obtain the bit of the currently described precharge function;

[0013] Compare the current bit of the precharge function with the bit of the pre-configured precharge function's enabled state;

[0014] If the bit of the current pre-charge function is the same as the bit of the enabled state, the current pre-charge function is determined to be enabled; otherwise, the current pre-charge function is determined to be disabled.

[0015] According to one embodiment of this application, the step of obtaining the type of the currently displayed screen on the display panel includes:

[0016] Based on the digital control signal of the sub-pixel, determine whether the type of the currently displayed image is the horizontal stripe image;

[0017] If it is not the horizontal stripe image, then the type of the currently displayed image is determined to be a checkerboard image based on the digital control signal of the sub-pixel.

[0018] According to an embodiment of this application, the step of determining whether the type of the currently displayed image is the horizontal stripe image based on the digital control signal of the sub-pixel includes:

[0019] The digital control signals of the sub-pixels in the same row are compared, and the digital control signals of any two adjacent rows of sub-pixels are compared.

[0020] If the digital control signals of the sub-pixels in the same row are the same, and the digital control signals of any two adjacent rows of sub-pixels are different, then the type of the current display screen is determined to be the horizontal stripe screen; otherwise, the type of the current display screen is determined not to be the horizontal stripe screen.

[0021] According to one embodiment of this application, the step of determining whether the type of the currently displayed screen is a checkerboard screen based on the digital control signal of the sub-pixel includes:

[0022] Compare the digital control signals of the sub-pixels in the same row;

[0023] If the digital control signals of the sub-pixels in the same row show a continuous alternating arrangement of multiple first digital control signals and multiple second digital control signals, it is determined that the type of the current display screen is the checkerboard screen, and the first digital control signals and the second digital control signals are different; otherwise, it is determined that the type of the current display screen is not the checkerboard screen.

[0024] According to one embodiment of this application, the step of obtaining the type of the currently displayed screen on the display panel includes:

[0025] Obtain the polarity and data signal voltage of the sub-pixels in the currently displayed screen;

[0026] Based on the polarity of the sub-pixels and the data signal voltage, determine whether the type of the currently displayed image is the horizontal stripe image;

[0027] If it is not the horizontal stripe pattern, then the type of the currently displayed image is determined to be a checkerboard pattern based on the polarity of the sub-pixels and the data signal voltage.

[0028] According to an embodiment of this application, the step of determining whether the type of the currently displayed image is the horizontal stripe image based on the polarity of the sub-pixel and the data signal voltage includes:

[0029] The polarity of the sub-pixels in the same row (odd or even columns) and the voltage of the data signal are compared.

[0030] If the polarity of the sub-pixels in the odd or even columns of the same row is the same, and the data signal voltage is the same, then the type of the current display screen is determined to be the horizontal stripe screen; otherwise, the type of the current display screen is determined not to be the horizontal stripe screen.

[0031] According to one embodiment of this application, the display panel has multiple source driving circuits, each of which is used to drive a corresponding multiple columns of sub-pixels. The step of determining whether the type of the current display screen is a checkerboard screen based on the polarity of the sub-pixels and the data signal voltage includes:

[0032] The polarity and data signal voltage of the sub-pixels in the odd or even columns of the same row corresponding to the same source driving circuit are compared, and the data signal voltages of the sub-pixels in the odd or even columns of the same row corresponding to two adjacent source driving circuits are compared.

[0033] If the polarity and data signal voltage of the sub-pixels in the same row corresponding to the same source driving circuit are the same, and the data signal voltages of the sub-pixels in the same row corresponding to two adjacent source driving circuits are different; or, if a portion of several consecutive odd-numbered sub-pixels in the same row corresponding to the same source driving circuit have a first data signal voltage, and another portion of several consecutive odd-numbered sub-pixels have a second data signal voltage, and the first data signal voltage is different from the second data signal voltage, then the type of the current display screen is determined to be the checkerboard screen; otherwise, the type of the current display screen is determined not to be the checkerboard screen.

[0034] According to an embodiment of this application, the step of controlling the pre-charging function to remain on or off based on the type of the currently displayed screen includes:

[0035] If the type of the currently displayed screen is a checkerboard screen, then the number of checkerboard squares in the currently displayed screen is compared with a preset checkerboard square number threshold.

[0036] If the number of chessboard squares in the currently displayed screen is greater than the chessboard square number threshold, then the pre-charging function remains enabled.

[0037] Embodiments of this application also provide a driving device for a display panel, the driving device comprising:

[0038] The detection unit is used to obtain the status of the pre-charging function of the display panel, and to obtain the type of the current display screen of the display panel when the pre-charging function is enabled, and to obtain the number of checkerboard squares in the current display screen when the type of the current display screen is a checkerboard screen.

[0039] The comparison unit is used to compare the number of chessboard squares in the current display screen with a preset chessboard square number threshold when the type of the current display screen is the chessboard screen.

[0040] The configuration unit is configured to disable the pre-charging function when the type of the current display screen is the horizontal stripe screen, or when the type of the current display screen is the checkerboard screen and the number of checkerboard squares in the current display screen is less than or equal to the checkerboard square number threshold.

[0041] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a driving method and driving device for a display panel. The driving method for the display panel detects the type of the current display screen and disables the pre-charging function when the type of the current display screen is a horizontal stripe screen or a checkerboard screen, and the number of checkerboard squares in the checkerboard screen is less than or equal to a preset checkerboard square number threshold. This avoids the increase in power consumption caused by short-circuiting the positive and negative channels when the pre-charging function is enabled when displaying a horizontal stripe screen or a partial checkerboard screen, thereby reducing the power consumption of the display panel. Attached Figure Description

[0042] Figure 1 This is a schematic diagram of the positive electrode channel neutralization.

[0043] Figure 2 This is a schematic diagram of a chessboard pattern.

[0044] Figure 3 A logical schematic diagram of a display panel driving method provided for an embodiment of this application;

[0045] Figure 4 A schematic diagram of the frame of a first type of driving device provided for an embodiment of this application;

[0046] Figure 5 A schematic diagram of the frame of a second driving device provided for an embodiment of this application. Detailed Implementation

[0047] The following descriptions of the embodiments are based on the accompanying illustrations and are used to illustrate specific embodiments in which this application can be implemented. Directional terms used in this application, such as [up], [down], [front], [back], [left], [right], [inner], [outer], [side], etc., are only for reference to the accompanying drawings. Therefore, the directional terms used are for illustrative and understanding purposes and not for limiting the application. In the figures, structurally similar units are represented by the same reference numerals.

[0048] The present application will be further described below with reference to the accompanying drawings and specific embodiments.

[0049] Combination Figure 1 As shown, Figure 1 This diagram illustrates the neutralization of the positive channel. For a column-inverting LCD panel, when displaying horizontal stripes, if the pre-charge function is enabled, due to the characteristic of one row being bright and the other row being dark, the voltage of both channels 1 and 3 before neutralization is 5V, and the voltage of both remains 5V after neutralization. There is no change in voltage before and after neutralization, so enabling the pre-charge function does not save power. However, when shorting the positive and negative channels, transistors need to be switched, which will actually increase the power consumption of the display panel itself.

[0050] Combination Figure 2 As shown, Figure 2 The diagram illustrates a checkerboard pattern. In a 4x4 checkerboard pattern with four source driver circuits (S-IC1, S-IC2, S-IC3, S-IC4), each source driver circuit corresponds to one color. In the same row of sub-pixels, where there is no grayscale transition (i.e., the area shown by the two dashed lines in the 4x4 checkerboard pattern), the neutralized voltage remains unchanged, and there is no pre-charging phenomenon. However, in an 8x8 checkerboard pattern, each source driver chip corresponds to two colors. In the same row of sub-pixels, where there is a transition between a black and a white pixel (i.e., the area shown by the two dashed lines in the 8x8 checkerboard pattern), the voltage differs. The neutralized voltage is the midpoint between the two, unlike either one, resulting in a more noticeable pre-charging phenomenon, which can achieve a power-saving effect.

[0051] Based on the above analysis, it can be seen that enabling the pre-charge function does not achieve the effect of saving power in horizontal stripe screens and some checkerboard screens. On the contrary, it requires switching transistors when shorting the positive and negative channels, which increases the power consumption of the display panel.

[0052] The embodiments of this application provide a driving method for a display panel, which can detect the type of heavy-load display and disable the pre-charging function when displaying horizontal stripe images and partial checkerboard images, thereby reducing the power consumption of the display panel.

[0053] Combination Figure 3 As shown, Figure 3 A schematic diagram of a driving method for a display panel provided in an embodiment of this application. The driving method for the display panel includes:

[0054] Step S1: Obtain the status of the pre-charging function of the display panel; Step S2: When the pre-charging function is on, obtain the type of the current display screen on the display panel, including horizontal stripe screen and checkerboard screen; Step S3: Control the pre-charging function to remain on or off according to the type of the current display screen.

[0055] Step S3 includes: if the type of the currently displayed screen is a horizontal stripe screen, or if the type of the currently displayed screen is a checkerboard screen and the number of checkerboard squares in the currently displayed screen is less than or equal to the checkerboard square number threshold, then control the pre-charging function to switch from the on state to the off state.

[0056] Specifically, step S3 includes: if the current display screen type is a horizontal stripe screen, then turn off the pre-charging function; if the current display screen type is a checkerboard screen, then compare the number of checkerboard squares in the current display screen with a preset checkerboard square number threshold; if the number of checkerboard squares in the current display screen is greater than the checkerboard square number threshold, then keep the pre-charging function enabled; if the number of checkerboard squares in the current display screen is less than or equal to the checkerboard square number threshold, then turn off the pre-charging function.

[0057] In some embodiments, step S1 includes: obtaining the bit of the current pre-charge function; comparing the bit of the current pre-charge function with the bit of the pre-configured pre-charge function corresponding to the on state; if the bit of the current pre-charge function is the same as the bit of the on state, then it is determined that the current pre-charge function is in the on state; if they are different, then it is determined that the current pre-charge function is in the off state.

[0058] In one embodiment, the pre-configured pre-charge function has three modes: LL and LH / HH. LL mode corresponds to the off state, meaning the pre-charge function is not enabled. LH / HH ​​mode, during the standby state, involves the source drive circuit determining whether to short-circuit the positive or negative channel based on the most significant bit (MSB). HL mode, during the standby state, involves short-circuiting both the positive and negative channels. Both LH / HH ​​and HL modes correspond to the on state, meaning the pre-charge function is enabled in both modes. The bit value for LL mode is 00, for LH mode it is 01, for HH mode it is 11, and for HL mode it is 10.

[0059] For example, assuming the current pre-charge function bit of the display panel is 00, comparing the current pre-charge function bit with the pre-configured bit corresponding to the on state of the pre-charge function, if the current pre-charge function bit is different from the pre-configured bit corresponding to the on state of the pre-charge function (01, 10, 11), then the pre-charge function of the display panel is determined to be in the off state and is not enabled. Conversely, assuming the current pre-charge function bit is 01, comparing the current pre-charge function bit with the pre-configured bit corresponding to the on state of the pre-charge function, if the current pre-charge function bit is the same as the pre-configured bit corresponding to the on state of the pre-charge function, then the pre-charge function of the display panel is determined to be in the enabled state.

[0060] In some embodiments, the timing control circuit determines whether the type of the current display screen is a horizontal stripe screen or a checkerboard screen. Step S2 includes: acquiring digital control signals of multiple consecutive rows of sub-pixels in the current display screen; determining whether the type of the current display screen is a horizontal stripe screen based on the digital control signals of the sub-pixels; if it is not a horizontal stripe screen, determining whether the type of the current display screen is a checkerboard screen based on the digital control signals of the sub-pixels.

[0061] In one embodiment, the step of determining whether the type of the current display screen is a horizontal stripe screen based on the digital control signal of the sub-pixels includes: comparing the digital control signals of sub-pixels located in the same row in a continuous multi-row sub-pixel sequence, and comparing the digital control signals of any two adjacent rows of sub-pixels; if the digital control signals of sub-pixels located in the same row in a continuous multi-row sub-pixel sequence are the same, and the digital control signals of any two adjacent rows of sub-pixels are different, it is determined that the type of the current display screen is a horizontal stripe screen; otherwise, it is determined that the type of the current display screen is not a horizontal stripe screen.

[0062] Specifically, since the timing control circuit outputs a digital signal, if a sub-pixel emits light, the digital control signal output by the timing control circuit is 1; if the sub-pixel does not emit light, the digital control signal output by the timing control circuit is 0. Taking a horizontal stripe image as an example, a horizontal stripe image is an image with alternating rows of bright and dark sub-pixels. In this image, the digital control signals of all sub-pixels in a bright row are 1, and the digital control signals of all sub-pixels in a dark row are 0. In step S2, the digital control signals of 6 or 8 rows of sub-pixels pre-buried in the buffer of the timing control circuit can be obtained and compared. If the digital control signals of 4 rows of sub-pixels meet the above requirements, the current display image type can be determined to be a horizontal stripe image. If some sub-pixels in the same row have a digital control signal of 1 and others have a digital control signal of 0, the current display image type is determined not to be a horizontal stripe image; if the digital control signals of all sub-pixels in the same row are 1, and the digital control signals of the adjacent row of sub-pixels are also 1, the current display image type is determined not to be a horizontal stripe image.

[0063] If it is determined that the current display screen type is not a horizontal stripe screen, then the type of the current display screen is determined to be a checkerboard screen based on the digital control signals of the sub-pixels. The steps for determining whether the current display screen type is a checkerboard screen based on the digital control signals of the sub-pixels include: comparing the digital control signals of the sub-pixels in the same row; if the digital control signals of the sub-pixels in the same row show a continuous alternating arrangement of multiple first digital control signals and multiple continuous second digital control signals, then the current display screen type is determined to be a checkerboard screen, and the first digital control signals and second digital control signals are different; otherwise, the current display screen type is determined not to be a checkerboard screen.

[0064] Specifically, since the timing control circuit outputs a digital signal, if a sub-pixel emits light, the digital control signal output by the timing control circuit is 1; if a sub-pixel does not emit light, the digital control signal output by the timing control circuit is 0. Taking a checkerboard pattern as an example, the sub-pixels corresponding to black squares do not emit light, and the digital control signals of the sub-pixels within the black squares are all 0; the sub-pixels corresponding to white squares emit light, and the digital control signals of the sub-pixels within the white squares are all 1.

[0065] By comparing the digital control signals of any row of sub-pixels, if the digital control signals of the same row of sub-pixels show a continuous alternation of multiple first digital control signals and multiple consecutive second digital control signals, it can be determined that the current display screen type is a checkerboard screen, and the first digital control signals and second digital control signals are different; otherwise, it can be determined that the current display screen type is not a checkerboard screen.

[0066] by Figure 2 Taking the first row of black and white squares in the 4*4 checkerboard pattern as an example, assuming each row of black and white squares has 4 sub-pixels, the digital control signals of the first row of sub-pixels in the first row of black and white squares should be 0000111100001111 from left to right. It should be noted that the above is only an example of how to determine the checkerboard pattern and does not represent the actual number of sub-pixels in a checkerboard pattern. The number of sub-pixels in each checkerboard pattern depends on the size and resolution of the display panel and the number of checkerboard patterns in the display screen. In some embodiments, the source drive circuit determines whether the current display screen type is a horizontal stripe pattern or a checkerboard pattern. Step S2 includes: acquiring the data signal voltage of multiple consecutive rows of sub-pixels in the current display screen; determining whether the current display screen type is a horizontal stripe pattern based on the polarity of the sub-pixels and the data signal voltage; if it is not a horizontal stripe pattern, then determining whether the current display screen type is a checkerboard pattern based on the polarity of the sub-pixels and the data signal voltage.

[0067] In one embodiment, the step of determining whether the type of the current display screen is a horizontal stripe screen based on the polarity of the sub-pixels and the data signal voltage includes: comparing the data signal voltages of the sub-pixels in the odd-numbered or even-numbered columns of the same row; if the data signal voltages of the sub-pixels in the odd-numbered or even-numbered columns of any row are the same, the type of the current display screen is determined to be a horizontal stripe screen; otherwise, the type of the current display screen is determined not to be a horizontal stripe screen.

[0068] Specifically, for a column-inverting LCD panel, the polarity of sub-pixels in odd-numbered columns is the same, and the polarity of sub-pixels in even-numbered columns is the same. If the currently displayed image is a horizontal stripe image, the data signal voltage of sub-pixels in odd-numbered columns within the same row is also the same, and the data signal voltage of sub-pixels in even-numbered columns within the same row is the same. Figure 1 For example, assuming that the polarity of odd-numbered sub-pixels in the current frame is positive and the polarity of even-numbered sub-pixels is negative, in the row of sub-pixels corresponding to the first scan line G-line1, the data signal voltage of the first, third, fifth, and other odd-numbered sub-pixels is 5V. In this way, it can be determined that the type of the current frame is a horizontal stripe image.

[0069] If the pre-charge function is enabled when displaying horizontal stripes, the voltage of the data signal lines of odd-numbered sub-pixels remains unchanged before and after shorting, and the purpose of saving power is not achieved. The embodiments of this application detect horizontal stripes through a source drive circuit or timing control circuit, and disable the pre-charge function for horizontal stripes. Therefore, during the standby state, there is no need to short-circuit the positive channel and the negative channel terminal, thereby reducing the power consumption caused by enabling the pre-charge function itself.

[0070] In some embodiments, step S3 includes: if the current display screen is a horizontal stripe screen, comparing the current precharge function bit from high bit to low bit with the bit corresponding to the off state and reconfiguring it until the precharge function bit is configured to be equal to the bit corresponding to the off state.

[0071] For example, if the current display is a horizontal stripe screen, the current pre-charge function bit is 11, and the bit corresponding to the off state is 00, the high bit of the current pre-charge function bit is compared with the high bit of the bit corresponding to the off state. Since the high bit of the current pre-charge function bit is different from the high bit of the bit corresponding to the off state, the high bit of the current pre-charge function bit is configured to 0. Then, the low bit of the current pre-charge function bit is compared with the low bit of the bit corresponding to the off state. Since the low bit of the current pre-charge function bit is different from the low bit of the bit corresponding to the off state, the high bit of the current pre-charge function bit is configured to 0. At this point, the pre-charge function bit is reconfigured to 00, and the timing controller turns off the pre-charge function based on the reconfigured bit 00.

[0072] In one embodiment, the display panel has multiple source driving circuits, each source driving circuit driving a corresponding multiple columns of sub-pixels. The step of determining whether the current display screen type is a checkerboard screen based on the polarity of the sub-pixels and the data signal voltage includes: comparing the polarity and data signal voltage of the odd-numbered or even-numbered columns of sub-pixels in the same row corresponding to the same source driving circuit, and comparing the data signal voltage of the odd-numbered or even-numbered columns of sub-pixels in the same row corresponding to two adjacent source driving circuits; if the polarity and data signal voltage of the odd-numbered or even-numbered columns of sub-pixels in the same row corresponding to the same source driving circuit are the same, and the data signal voltages of the odd-numbered or even-numbered columns of sub-pixels in the same row corresponding to two adjacent source driving circuits are different; or, if a portion of multiple consecutive odd-numbered columns of sub-pixels in the same row corresponding to the same source driving circuit have a first data signal voltage, and another portion of multiple consecutive odd-numbered columns of sub-pixels have a second data signal voltage, and the first data signal voltage and the second data signal voltage are different, then the current display screen type is determined to be a checkerboard screen; otherwise, the current display screen type is determined not to be a checkerboard screen.

[0073] Specifically, for a column-inverted LCD panel, the sub-pixels in odd-numbered columns have the same polarity, and the sub-pixels in even-numbered columns have the same polarity. If the current displayed image is a checkerboard pattern, and the number of checkerboard patterns in the displayed image is less than or equal to 4, then... Figure 2 Taking the first row of the 4x4 checkerboard pattern as an example, source driver circuit S-IC1 corresponds to a black area. In any row corresponding to source driver circuit S-IC1, the data signal voltages of the odd-numbered sub-pixels are the same, and the data voltages of the even-numbered sub-pixels are also the same. Source driver circuit S-IC2 corresponds to a white area. In the same row, the data signal voltages of the odd-numbered sub-pixels corresponding to source driver circuit S-IC1 are different from those corresponding to the odd-numbered sub-pixels corresponding to source driver circuit S-IC2. This ensures that the sub-pixel corresponding to source driver circuit S-IC1 displays black, and the sub-pixel corresponding to source driver circuit S-IC2 displays white.

[0074] When the above conditions are met, the current display screen type can be determined to be a checkerboard screen. When the above conditions are not met, if a portion of several consecutive odd-numbered columns of sub-pixels in the same row corresponding to the same source drive circuit have a first data signal voltage, and another portion of several consecutive odd-numbered columns of sub-pixels in adjacent rows have a second data signal voltage, and the first data signal voltage and the second data signal voltage are different, then the current display screen type can also be determined to be a checkerboard screen. This determination method can be applied to display screens with more than 4 checkerboard patterns. When neither of the above two conditions is met, the current display screen type can be determined to be a non-checkerboard screen.

[0075] by Figure 2 Taking the first row of the 8x8 chessboard pattern as an example, the source driver circuit S-IC1 corresponds to a black block and a white block. In the same row of sub-pixels, the data signal voltage of the odd-numbered columns of sub-pixels in the black area is different from that of the odd-numbered columns of sub-pixels in the white area, and the data signal voltage of the even-numbered columns of sub-pixels in the black area is also different from that of the even-numbered columns of sub-pixels in the white area. Only in this way can the area corresponding to the source driver circuit S-IC1 display black and white block patterns respectively.

[0076] In some embodiments, step S4 further includes: if the type of the currently displayed screen is a checkerboard screen and the number of checkerboard squares in the currently displayed screen is greater than 4, keep the current setting; if the type of the currently displayed screen is a checkerboard screen and the number of checkerboard squares in the currently displayed screen is less than or equal to 4, turn off the pre-charging function.

[0077] Specifically, if the type of the currently displayed screen is a checkerboard screen, and the number of checkerboard squares in the currently displayed screen is less than or equal to 4, the steps to control the pre-charging function to switch from the on state to the off state include: comparing the bit of the currently set pre-charging function from the high bit to the low bit with the bit corresponding to the off state and reconfiguring it until the bit of the pre-charging function is configured to be equal to the bit corresponding to the off state.

[0078] For example, if the current display screen is a checkerboard pattern with 4 checkerboard patterns, the current pre-charge function bit is 01, and the bit corresponding to the off state is 00, the high-order bit of the current pre-charge function bit is compared with the high-order bit of the off state bit. Since the high-order bit of the current pre-charge function bit is the same as the high-order bit of the off state bit, the high-order bit of the current pre-charge function bit does not need to be reconfigured. Then, the low-order bit of the current pre-charge function bit is compared with the low-order bit of the off state bit. Since the low-order bit of the current pre-charge function bit is different from the low-order bit of the off state bit, the high-order bit of the current pre-charge function bit is configured to 0. At this point, the pre-charge function bit is reconfigured to 00, and the timing controller disables the pre-charge function based on the reconfigured bit 00.

[0079] Based on the display panel driving method provided in the above embodiments of this application, embodiments of this application also provide a driving device applied to a display panel, wherein the display panel is a column-inverting liquid crystal display panel, and the driving device is electrically connected to the display panel.

[0080] like Figure 4 As shown, Figure 4This is a schematic diagram of the first driving device provided in the embodiments of this application. The display panel is a liquid crystal display panel with a column inversion architecture. The driving device includes a source driving circuit, a gate driving circuit, and a timing control circuit. The timing control circuit is electrically connected to the gate driving circuit and the source driving circuit, respectively. The liquid crystal display panel is electrically connected to the source driving circuit and the gate driving circuit, respectively.

[0081] The source drive circuit includes a detection unit, and the timing control circuit includes a comparison unit and a configuration unit, with the comparison unit and configuration unit electrically connected. The detection unit is used to acquire the status of the pre-charge function of the display panel, and when the pre-charge function is enabled, to acquire the type of the current display screen on the display panel, and when the current display screen type is a checkerboard screen, to acquire the number of checkerboard squares in the current display screen. The comparison unit is used to compare the number of checkerboard squares in the current display screen with a preset checkerboard square number threshold when the current display screen type is a checkerboard screen. The configuration unit is used to disable the pre-charge function when the current display screen type is a horizontal stripe screen, or when the current display screen type is a checkerboard screen and the number of checkerboard squares in the current display screen is less than or equal to the checkerboard square number threshold; and to keep the pre-charge function enabled when the number of checkerboard squares in the current display screen is greater than the checkerboard square number threshold; it is also used to keep the pre-charge function enabled when the current display screen type is neither a horizontal stripe screen nor a checkerboard screen.

[0082] exist Figure 4 In the illustrated embodiment, the source drive circuit includes a detection unit, which detects whether the system is currently set to enable the pre-charging function and the type of the current display screen. The detection unit feeds back the detected signal to the timing control circuit, which determines whether the number of checkerboard squares in the current display screen exceeds the checkerboard square number threshold. If the current display screen is a horizontal stripe screen or a checkerboard screen, and the number of checkerboard squares in the screen is less than or equal to 4, the timing control circuit compares and reconfigures the bits of the pre-charging function to disable the pre-charging function.

[0083] like Figure 5 As shown, Figure 5 A schematic diagram of the frame of the second type of driving device provided in the embodiments of this application, the structure of which is similar to... Figure 4 The first type of driving device shown is largely the same, except that the timing control circuit includes a detection unit, a comparison unit, and a configuration unit.

[0084] exist Figure 5In the embodiment shown, the timing control circuit detects whether the system is currently set to enable the pre-charging function and the type of the current display screen, determines whether the number of checkerboard squares in the current display screen exceeds the threshold, and compares and reconfigures the bits of the pre-charging function to disable the pre-charging function when the current display screen is a horizontal stripe screen or a checkerboard screen and the number of checkerboard squares in the screen is less than or equal to 4.

[0085] The beneficial effects of the embodiments of this application are as follows: The embodiments of this application provide a driving method and driving device for a display panel. The driving method for the display panel detects the type of the current display screen and disables the pre-charging function when the type of the current display screen is a horizontal stripe screen or a checkerboard screen, and the number of checkerboard squares in the checkerboard screen does not exceed a threshold. This avoids the increase in power consumption caused by short-circuiting the positive and negative channels when the pre-charging function is enabled when displaying a horizontal stripe screen or a partial checkerboard screen, thereby reducing the power consumption of the display panel.

[0086] In summary, although the present application discloses the preferred embodiments as described above, the above preferred embodiments are not intended to limit the present application. Those skilled in the art can make various modifications and refinements without departing from the spirit and scope of the present application. Therefore, the scope of protection of the present application is based on the scope defined by the claims.

Claims

1. A driving method of a display panel, characterized by, The method comprises the following steps: acquiring a state of a pre-charge function of the display panel; when the pre-charge function is in an open state, acquiring a type of a current display picture of the display panel, the type of the display picture comprising a horizontal stripe picture and a chessboard picture; controlling the pre-charge function to maintain the open state or be closed according to the type of the current display picture, comprising: if the type of the current display picture is the horizontal stripe picture, or the type of the current display picture is the chessboard picture and a number of chessboards in the current display picture is less than or equal to a threshold value of the number of chessboards, controlling the pre-charge function to switch from the open state to a closed state.

2. The driving method of a display panel according to claim 1, wherein The step of acquiring the state of the pre-charge function of the display panel comprises: acquiring a bit of the current pre-charge function; comparing the bit of the current pre-charge function with a bit of the open state of the pre-charge function configured in advance; if the bit of the current pre-charge function is the same as the bit of the open state, determining that the current pre-charge function is in the open state; if not, determining that the current pre-charge function is in the closed state.

3. The driving method of a display panel according to claim 1 or 2, wherein The step of acquiring the type of the current display picture of the display panel comprises: acquiring digital control signals of a plurality of continuous rows of sub-pixels in the current display picture; determining whether the type of the current display picture is the horizontal stripe picture according to the digital control signals of the sub-pixels; if not the horizontal stripe picture, determining whether the type of the current display picture is the chessboard picture according to the digital control signals of the sub-pixels.

4. The driving method of a display panel according to claim 3, wherein The step of determining whether the type of the current display picture is the horizontal stripe picture according to the digital control signals of the sub-pixels comprises: comparing the digital control signals of the sub-pixels in the same row, and comparing the digital control signals of any two adjacent rows of the sub-pixels; if the digital control signals of the sub-pixels in the same row are the same, and the digital control signals of any two adjacent rows of the sub-pixels are different, determining that the type of the current display picture is the horizontal stripe picture; otherwise, determining that the type of the current display picture is not the horizontal stripe picture.

5. The driving method of a display panel according to claim 3, wherein The step of determining whether the type of the current display picture is the chessboard picture according to the digital control signals of the sub-pixels comprises: comparing the digital control signals of the sub-pixels in the same row; if the digital control signals of the sub-pixels in the same row present that a plurality of first digital control signals and a plurality of second digital control signals are arranged alternately and repeatedly, and the first digital control signals are different from the second digital control signals, determining that the type of the current display picture is the chessboard picture; otherwise, determining that the type of the current display picture is not the chessboard picture.

6. The driving method of a display panel according to claim 1 or 2, wherein The step of acquiring the type of the current display picture of the display panel comprises: acquiring polarity and data signal voltage of the sub-pixels in the current display picture; determining whether the type of the current display picture is the horizontal stripe picture according to the polarity and the data signal voltage of the sub-pixels; If the current display picture is not the horizontal stripe picture, whether the current display picture is the checkerboard picture is determined according to the polarity of the sub-pixel and the data signal voltage.

7. The driving method of a display panel according to claim 6, wherein The step of determining whether the current display picture is the horizontal stripe picture according to the polarity of the sub-pixel and the data signal voltage comprises: comparing the polarity of the sub-pixel and the data signal voltage of the odd column or the even column in the same row; if the polarity of the sub-pixel and the data signal voltage of the odd column or the even column in the same row are the same, it is determined that the current display picture is the horizontal stripe picture; otherwise, it is determined that the current display picture is not the horizontal stripe picture.

8. The driving method of a display panel according to claim 6, wherein The display panel has a plurality of source driving circuits, each of which is used to drive a corresponding plurality of columns of sub-pixels, and the step of determining whether the current display picture is the checkerboard picture according to the polarity of the sub-pixel and the data signal voltage comprises: comparing the polarity of the sub-pixel and the data signal voltage of the odd column or the even column in the same row corresponding to the same source driving circuit, and comparing the data signal voltage of the odd column or the even column in the same row corresponding to adjacent two source driving circuits; if the polarity of the sub-pixel and the data signal voltage of the odd column or the even column in the same row corresponding to the same source driving circuit are the same, and the data signal voltage of the odd column or the even column in the same row corresponding to adjacent two source driving circuits are different; or if the sub-pixels of a plurality of consecutive odd columns corresponding to the same source driving circuit have a first data signal voltage, and the sub-pixels of another plurality of consecutive odd columns adjacent to the plurality of consecutive odd columns have a second data signal voltage, the first data signal voltage is different from the second data signal voltage, it is determined that the current display picture is the checkerboard picture; otherwise, it is determined that the current display picture is not the checkerboard picture.

9. The driving method of a display panel according to claim 1, wherein The step of controlling the pre-charge function to maintain an open state or a closed state according to the type of the current display picture comprises: if the type of the current display picture is the checkerboard picture, comparing the number of checkerboards in the current display picture with a preset threshold value of the number of checkerboards; if the number of checkerboards in the current display picture is greater than the threshold value of the number of checkerboards, the pre-charge function is kept open.

10. A driving device applied to a display panel, characterized in that, The driving device comprises: a detection unit configured to acquire the state of the pre-charge function of the display panel, and configured to acquire the type of the current display picture of the display panel when the pre-charge function is open, and further configured to acquire the number of checkerboards in the current display picture when the type of the current display picture is the checkerboard picture; a comparison unit configured to compare the number of checkerboards in the current display picture with a preset threshold value of the number of checkerboards when the type of the current display picture is the checkerboard picture. The configuration unit is configured to turn off the pre-charge function when the type of the current display picture is a horizontal stripe picture, or when the type of the current display picture is the checkerboard picture and the number of checkerboards in the current display picture is less than or equal to the threshold number of checkerboards.

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