CN105096873B - A kind of method for displaying image and liquid crystal display - Google Patents
A kind of method for displaying image and liquid crystal display Download PDFInfo
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Abstract
The invention discloses a kind of method for displaying image and liquid crystal display, before two field picture to be shown is shown, when the polarity of each row data is situation about need not invert when it is determined that two field picture to be shown is in display, the data corresponding to the row corresponding with previous frame image of the data corresponding to every a line of two field picture to be shown are compared；Determine in two field picture to be shown that the row that the data of data and the former frame corresponding row of display image are differed is used as change row, only refreshes change row.As long as so when the two field pictures that polarity is kept have the row of identical data, in the latter two field picture in showing the adjacent two field pictures, avoid the need for being refreshed for identical row, so as to the power consumption of effectively reduction refreshed image, and then can effectively reduce image display power consumption.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to an image display method and a liquid crystal display.
Background
With the development of display technology, power consumption has always been a key indicator in display product design. Currently, in order to reduce power consumption, a Panel self refresh technology (PSR) is introduced at a Display interface (DP) of a Display device. The method comprises adding a Remote Frame Buffer (RFB) in a clock controller of a display panel for storing data of a Frame image to be displayed input by an external signal source, wherein the external signal source needs to compare the data of the Frame image to be displayed with the data of the previous Frame image before displaying the Frame image to be displayed, if the data are different, the external signal source transmits the data of the Frame image to be displayed to the Remote Frame Buffer, the display panel refreshes according to the received data of the Frame image to be displayed when displaying the Frame image to be displayed, if the data are the same, the external signal source does not need to transmit the data of the Frame image to be displayed to the Remote Frame Buffer, and when displaying the Frame image to be displayed, the display panel refreshes according to the data which are stored in the Remote Frame Buffer and are the same as the data of the Frame image to be displayed, thereby reducing the data amount transmitted from the external signal source to the display panel, thereby reducing power consumption.
As can be seen from the above, the above method mainly achieves the purpose of reducing power consumption by reducing the transmission of the same data, but in the above method, the effect of reducing power consumption can be achieved only when the data of two adjacent frames of images are completely the same, so the effect is very small for dynamic display.
Therefore, it is an urgent technical problem to be solved by those skilled in the art to provide a new method for reducing power consumption of a display panel.
Disclosure of Invention
The embodiment of the invention provides an image display method and a liquid crystal display, which are used for reducing the power consumption of a display panel when displaying images.
The embodiment of the invention provides an image display method, which comprises the following steps:
judging the polarity of each line of data corresponding to the nth frame of image to be displayed, and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed or not; wherein n is a positive integer not less than 1;
if so, controlling the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and refreshing the data in full screen according to each row of data after the polarity inversion so as to display the frame image to be displayed;
otherwise, comparing the data of each row of the frame image to be displayed with the data of the row corresponding to the displayed image of the previous frame, determining the row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row.
Preferably, in the image display method according to the embodiment of the present invention, if the number of the changed rows is zero, the timing controller controls the gate driving circuit to turn off the switching elements in the pixels in each row, and controls the source driving circuit not to output data in each row, so that the pixels in each row maintain data in each row of the n-1 th frame image.
Preferably, in the image display method provided in the embodiment of the present invention, a row in a frame image to be displayed, whose data is different from data of a row corresponding to a displayed image of a previous frame, is determined, and is used as a changed row, and only the changed row is refreshed, specifically:
and the time sequence controller controls the grid driving circuit to enable the switching elements of the pixels of the corresponding row to be turned on and the switching elements of the pixels of other rows to be turned off, and controls the source driving circuit to only output the data signals of the changed row and controls the pixels of other rows to keep the data of each row of the n-1 th frame image.
Preferably, in the image display method provided in the embodiment of the present invention, the polarity of each line of data corresponding to the nth frame of image to be displayed is determined, and whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be inverted is compared, specifically:
searching the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to the (n-1) th frames aiming at any pixel on the display device;
if the number of the positive and negative polarities of the pixels is the same, determining that the polarity of each row of data corresponding to the frame image to be displayed needs to be reversed, and determining the reversal as first type reversal;
if the number of the positive and negative polarities of the pixels is different, judging whether the polarities of the pixels of the (n-M) th to (n-1) th frames are the same, if so, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal as second type reversal, otherwise, determining the type of the last reversal before the frame image to be displayed;
if the last inversion type before the frame image to be displayed is determined to be the first type inversion or not, comparing the data of each line of the frame image to be displayed with the data of the corresponding line of the displayed image of the previous frame; if the comparison result is that the rows with the same data exist, determining that the polarity of the data of each row does not need to be inverted when the frame image to be displayed is displayed; if the comparison result does not have the rows with the same data, determining that the polarity of the data of each row corresponding to the frame image to be displayed needs to be reversed compared with the polarity of the data of each row corresponding to the displayed image of the previous frame, and determining the reversal as a third type reversal;
if the last inversion type before the frame image to be displayed is determined to be the second type inversion or the third type inversion, determining that the polarity of each line of data corresponding to the frame image to be displayed does not need to be inverted compared with the polarity of each line of data corresponding to the displayed image of the previous frame; wherein M is an integer of 1 to 16.
Preferably, in the image display method provided in the embodiment of the present invention, the searching for the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to n-1 st frames specifically includes:
acquiring the number of frames with positive polarity and the number of frames with negative polarity of the recorded pixels, determining the number of frames with positive polarity and the number of frames with negative polarity of the recorded pixels, and if the number of frames with positive polarity of the recorded pixels is equal to the number of frames with negative polarity, determining that the number of positive polarities and the number of negative polarities of the pixels corresponding to the displayed images of the 1-n-1 frames are the same;
determining the number of recorded frames with positive polarity and the number of recorded frames with negative polarity of the pixels, specifically:
determining the polarity of the pixel corresponding to the displayed image of the (n-1) th frame, if the polarity of the pixel corresponding to the displayed image of the (n-1) th frame is positive, adding 1 to the frame number of the recorded pixel with the positive polarity, and if the polarity of the pixel corresponding to the displayed image of the (n-1) th frame is negative, adding 1 to the frame number of the recorded pixel with the negative polarity, wherein the initial value of the frame number of the recorded pixel with the positive polarity and the initial value of the frame number of the recorded pixel with the negative polarity are both 0.
Correspondingly, an embodiment of the present invention further provides a liquid crystal display, including: the control module, the source electrode driving circuit and the grid electrode driving circuit;
the control module is used for judging the polarity of each line of data corresponding to the nth frame of image to be displayed and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed or not;
when it is determined that the polarity of each line of data corresponding to the nth frame of image needs to be reversed, the control module is further configured to control the polarity of each line of data corresponding to the frame of image to be displayed to be reversed through the source driving circuit; the control module is also used for controlling the source electrode drive circuit and the grid electrode drive circuit to carry out full-screen refreshing according to the data of each row after the polarity inversion so as to display the frame image to be displayed;
when it is determined that the polarity of each row of data corresponding to the nth frame of image does not need to be inverted, the control module is further configured to compare each row of the frame of image to be displayed with the data of the row corresponding to the previous frame of displayed image, determine a row in the frame of image to be displayed, in which the data is different from the data of the row corresponding to the previous frame of displayed image, as a changed row, and only refresh the changed row by controlling the source driving circuit and the gate driving circuit.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is further configured to, when the number of the changed rows is zero, control the gate driving circuit to turn off the switching elements in the pixels in each row through the timing controller, and control the source driving circuit not to output data in each row, so that the pixels in each row maintain data in each row of the n-1 th frame image.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is further configured to, when it is determined that the number of the changed rows is not zero, control the gate driving circuit through the timing controller to turn on the switching elements of the pixels in the corresponding row and turn off the switching elements in the pixels in the other rows, and control the source driving circuit to output the data signals of the changed rows and control the pixels in the other rows to maintain the data of each row of the n-1 th frame image.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is specifically configured to: searching the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to the (n-1) th frames aiming at any pixel on the display device; if the number of the positive and negative polarities of the pixels is the same, determining the polarity of each line of data corresponding to the frame image to be displayed, comparing the polarity of each line of data corresponding to the displayed image of the previous frame, and needing to be reversed, and determining the reversal as the first type reversal; if the number of the positive and negative polarities of the pixels is different, judging whether the polarities of the pixels of the (n-M) th to (n-1) th frames are the same, if so, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal as second type reversal, otherwise, determining the type of the last reversal before the frame image to be displayed; if the last inversion type before the frame image to be displayed is determined to be the first type inversion or not, comparing the data of each line of the frame image to be displayed with the data of the corresponding line of the displayed image of the previous frame; if the comparison result is that the rows with the same data exist, determining that the polarity of the data of each row does not need to be inverted when the frame image to be displayed is displayed; if the comparison result does not have the rows with the same data, determining that the polarity of the data of each row corresponding to the frame image to be displayed needs to be reversed compared with the polarity of the data of each row corresponding to the displayed image of the previous frame, and determining the reversal as a third type reversal; if the last inversion type before the frame image to be displayed is determined to be the second type inversion or the third type inversion, determining that the polarity of each line of data corresponding to the frame image to be displayed does not need to be inverted compared with the polarity of each line of data corresponding to the displayed image of the previous frame; wherein M is an integer of 1 to 16.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is integrated on the timing controller.
The image display method and the liquid crystal display provided by the embodiment of the invention judge the polarity of each line of data corresponding to the nth frame of image to be displayed, and compare whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed; if so, controlling the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and refreshing the data of each row in a full screen mode according to the inverted polarity so as to display the frame image to be displayed; if not, comparing the data of each row of the frame image to be displayed with the data of the row corresponding to the displayed image of the previous frame, determining the row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row. Therefore, when two frames of images with the same polarity of corresponding row data have rows with the same data, the rows with the same data do not need to be refreshed when the next frame of image in the two adjacent frames of images is displayed, so that the power consumption of the refreshed images can be effectively reduced, and the power consumption of image display can be further effectively reduced. Therefore, compared with the prior art, the image display method can achieve the effect of reducing power consumption even if partial rows in two adjacent frames of images are the same, and compared with the prior art which achieves the purpose of reducing power consumption by reducing the quantity of transmission data, the image display method achieves the purpose of reducing power consumption by reducing the quantity of refresh data, the degree of reducing power consumption by reducing the quantity of refresh data is larger.
Drawings
FIG. 1 is a flowchart of an image display method according to an embodiment of the present invention;
fig. 2 is a flowchart for determining whether the polarity of a frame image to be displayed needs to be inverted according to a preset rule according to an embodiment of the present invention;
FIG. 3a is a schematic diagram of an image display method according to an embodiment of the present invention;
FIG. 3b is a timing diagram corresponding to FIG. 3 a;
FIG. 4a is a second schematic diagram of an image display method according to an embodiment of the present invention;
FIG. 4b is a timing diagram corresponding to FIG. 4 a;
fig. 5 is a schematic structural diagram of a liquid crystal display according to an embodiment of the invention.
Detailed Description
The following describes in detail an embodiment of an image display method and a liquid crystal display according to an embodiment of the present invention with reference to the accompanying drawings.
An image display method provided in an embodiment of the present invention, as shown in fig. 1, may include the following steps:
s101, judging the polarity of each line of data corresponding to the nth frame of image to be displayed, and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be inverted or not.
If necessary, step S102 is executed, and if not, step S103 is executed.
And S102, controlling the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and refreshing the data in full screen according to each row of data after the polarity is inverted so as to display the frame image to be displayed.
S103, comparing data of each row of the frame image to be displayed with data of a row corresponding to a displayed image of a previous frame, determining a row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row.
The image display method provided by the embodiment of the invention judges the polarity of each line of data corresponding to the nth frame of image to be displayed, and compares whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed; if so, controlling the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and refreshing the data of each row in a full screen mode according to the inverted polarity so as to display the frame image to be displayed; if not, comparing the data of each row of the frame image to be displayed with the data of the row corresponding to the displayed image of the previous frame, determining the row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row. Therefore, when two frames of images with the same polarity of corresponding row data have rows with the same data, the rows with the same data do not need to be refreshed when the next frame of image in the two adjacent frames of images is displayed, so that the power consumption of the refreshed images can be effectively reduced, and the power consumption of image display can be further effectively reduced.
Therefore, compared with the prior art, the image display method can achieve the effect of reducing power consumption even if partial rows in two adjacent frames of images are the same, and compared with the prior art which achieves the purpose of reducing power consumption by reducing the quantity of transmission data, the image display method achieves the purpose of reducing power consumption by reducing the quantity of refresh data, the degree of reducing power consumption by reducing the quantity of refresh data is larger.
In the image display method provided in the embodiment of the present invention, if the number of the changed lines is zero, that is, the data of the current frame image is completely the same as the data of the previous frame image, the current frame image does not need to be refreshed to keep the data of the previous frame image.
Specifically, the timing controller controls the gate driving circuit to close the switching elements in the pixels of each row, and controls the source driving circuit not to output data of each row, so that the pixels of each row maintain data of each row of the n-1 th frame image. Therefore, the source electrode driving circuit and the grid electrode driving circuit do not output data, so that the power consumption required by the source electrode driving circuit and the grid electrode driving circuit when the data is output is saved, and the power consumption of image display is effectively reduced. And when the image of the next frame is displayed, although the source electrode driving circuit and the grid electrode driving circuit are not controlled to output data, because each row of pixels keeps each row of data of the image of the (n-1) th frame, the normal display of the image of the frame can be ensured.
Preferably, in the image display method provided in the embodiment of the present invention, a row in the frame image to be displayed, in which data is different from data of a row corresponding to a displayed image in a previous frame, is determined, and as a changed row, only the changed row is refreshed, specifically:
and the time sequence controller controls the grid driving circuit to enable the switching elements of the pixels of the corresponding row to be turned on and the switching elements of the pixels of other rows to be turned off, and controls the source driving circuit to only output the data signals of the changed row and controls the pixels of other rows to keep the data of each row of the n-1 th frame image.
Preferably, in the image display method provided in the embodiment of the present invention, step S101 determines the polarity of each line data corresponding to the nth frame of image to be displayed, and compares whether the polarity of each line data corresponding to the displayed image of the (n-1) th frame needs to be inverted, as shown in fig. 2, specifically:
s201, aiming at any pixel on the display device, the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to the (n-1) th frames are searched. Wherein n is a positive integer not less than 1.
If the number of positive and negative polarities of the pixel is the same, step S202 is executed, otherwise step S203 is executed.
S202, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal as the first type reversal.
It should be noted that the first type of inversion is the inversion performed under the condition that the numbers of positive and negative polarities of the pixels corresponding to the displayed images of the 1 st to n-1 st frames determined in step S201 are the same.
S203, if the positive polarity and the negative polarity of the pixel are different, judging whether the polarities of the pixel in the (n-M) th to (n-1) th frames are the same or not; wherein M is an integer of 1 to 16.
If they are the same, step S204 is executed, and if they are not the same, step S205 is executed.
And S204, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal as a second type reversal.
It should be noted that the second type of inversion is the inversion performed under the condition that the number of positive and negative polarities of the pixel is the same, which is determined according to step S203.
S205, whether the type of the last inversion before the frame image to be displayed is the first type inversion or not is determined.
It should be noted that the determination of the type of the latest inversion before the frame image to be displayed here means under what conditions the latest inversion before the frame image to be displayed is performed.
If the first type inversion is determined or no inversion has occurred, step 206 is executed, and if the second type inversion is determined or the third type inversion is not determined, step 207 is executed.
S206, comparing the data corresponding to each line of the frame image to be displayed with the data corresponding to the line of the previous frame image, and confirming whether the lines with the same data exist.
Step S207 is performed if the comparison result is that there is a row with the same data, and step S208 is performed if the comparison result is that there is no row with the same data.
S207, determining that the polarity of each line of data corresponding to the frame image to be displayed does not need to be reversed compared with the polarity of each line of data corresponding to the displayed image of the previous frame.
S208, determining that the polarity of each line of data corresponding to the frame image to be displayed needs to be reversed compared with the polarity of each line of data corresponding to the displayed image of the previous frame, and determining the reversal as the third type reversal.
In the above image display method, the primary condition for the polarity inversion of each row of data corresponding to the frame image to be displayed is to ensure that the positive and negative numbers of the polarities of the pixels corresponding to the displayed images of the 1 st to (n-1) th frames are the same for any one pixel, so as to ensure that the time for the liquid crystal to be in the positive bias and the time for the liquid crystal to be in the negative bias are the same, thereby avoiding the problem of image sticking caused by the long time for the liquid crystal to be in one of the biases. Secondly, when the number of frames of the pixel with the polarity maintained reaches M frames, the polarity of the pixel must be reversed in the next frame of image, so as to avoid that the liquid crystal is kept in one of the bias states for too long to destroy the performance of the liquid crystal. The final requirement is that when the two conditions are not satisfied, when the last inversion type of the pixel is the first inversion type or no inversion has occurred, it is determined that the polarity of the liquid crystal needs to be inverted when the frame image to be displayed is displayed as long as there is no row with the same data when the data corresponding to each row of the frame image to be displayed is compared with the data corresponding to the row of the previous frame image.
In the image display method provided by the embodiment of the present invention, the polarity of the pixel is determined according to the comparison between the data of each frame of image and the data of the image of the previous frame, which is also for achieving the purpose of reducing power consumption compared with the prior art in which the polarities of the pixels corresponding to each frame of image need to be inverted. This is because if the polarities of the pixels of the adjacent two frame images need to be inverted, the change of the data voltage from the data of the previous frame image to the data voltage of the next frame image is large, but if the polarities of the pixels of the adjacent two frame images do not need to be inverted, the change of the data voltage from the data of the previous frame image to the data voltage of the next frame image is relatively small, so that the inversion of the polarities of the pixels is defined in this way, and the increase of power consumption due to the polarity inversion can be reduced to the maximum extent.
Further, in the image display method provided in the embodiment of the present invention, for any pixel, the positive or negative of the polarity of the pixel corresponding to the displayed image of the 1 st to n-1 th frames is searched, specifically:
acquiring the number of frames with positive polarity and the number of frames with negative polarity of the pixel, and determining that the number of positive polarity and the number of negative polarity of the pixel corresponding to the displayed images of the 1 st to the (n-1) th frames are the same;
determining the number of frames with positive polarity and the number of frames with negative polarity of the recorded pixel, specifically:
before displaying an nth frame image to be displayed, determining the polarity of the pixel corresponding to the displayed image of the nth-1 frame, if the polarity of the pixel corresponding to the displayed image of the nth-1 frame is positive, adding 1 to the frame number of the recorded pixel with the positive polarity, and if the polarity of the pixel corresponding to the displayed image of the nth-1 frame is negative, adding 1 to the frame number of the recorded pixel with the negative polarity, wherein the initial value of the frame number of the recorded pixel with the positive polarity and the initial value of the frame number of the recorded pixel with the negative polarity are both 0.
Further, in the image display method provided in the embodiment of the present invention, determining whether the polarities of the pixels of the previous consecutive M frames are the same specifically includes:
acquiring the number of recorded frames of which the polarities of the pixels are continuously the same, and if the number of the recorded frames of which the polarities are continuously the same is equal to M, determining that the polarities of the pixels of the previous continuous M frames are the same;
the method for determining the number of the recorded frames with the same continuous polarity of the pixel comprises the following steps: when two adjacent images compared have a line with the same data, adding 1 to the recorded frame number with the same continuous polarity of the pixel until the recorded frame number with the same continuous polarity of the pixel is equal to M, and updating the recorded frame number with the same continuous polarity of the pixel to be 1; when the two adjacent images do not have the line with the same data, updating the number of the recorded frames with the same continuous polarity of the pixel to be 1; the initial value of the number of frames in which the polarities of the pixels are recorded continuously the same is 1.
It should be noted that the image display method provided by the embodiment of the present invention is only applicable to the liquid crystal display, because the state of the liquid crystal can be maintained for a while after each pixel is charged in the liquid crystal display, in the image display method, when the data of two adjacent frames of images are the same, even when the next frame of image in the two adjacent frames of images is displayed, the data is not refreshed, and due to the characteristics of the liquid crystal display, the liquid crystal still maintains the state when the previous frame of image is displayed, so that the liquid crystal can still be normally displayed.
In practical implementation, in the image display method provided by the embodiment of the present invention, the larger the value of M, the smaller the number of times that the liquid crystal needs to be inverted, and the more the relative power consumption is reduced. However, the larger the value of M, the longer the liquid crystal is kept at a certain fixed polarity, and the display effect is relatively poor, while the smaller the value of M, the more the polarity needs to be inverted, and the less the relative power consumption is reduced. Therefore, the size of M is determined according to actual conditions in practical application.
Preferably, in the image display method provided by the embodiment of the present invention, when M is 10, the effect is optimal, that is, the display effect is not affected while reducing power consumption.
Further, in specific implementation, the timing controller generally controls the polarity of each row of data by controlling the potential of the polarity control signal, and the manner of controlling the polarity of data by the polarity control signal is the same as that in the prior art, and is not described herein again.
Therefore, in the image display method provided by the embodiment of the present invention, before displaying the frame image to be displayed, it is determined whether the polarity of each line of data corresponding to the frame image to be displayed needs to be inverted, which is equivalent to determining the potential of the polarity control signal, so that when displaying the frame image to be displayed, whether the polarity of the pixel is inverted is controlled according to the determined potential of the polarity control signal.
The above-described image display method provided by the embodiment of the present invention is described below by way of two specific examples.
For convenience of explanation, taking M equal to 4, taking one pixel as an example, it is specified that when the potential of the polarity control signal POL for controlling the polarity of the pixel is high, the polarity of the pixel is positive, and when the potential of the polarity control signal POL is low, the polarity of the pixel is negative.
Specifically, as shown in table 1 and table 2, it is assumed that the polarity of the pixel corresponding to the 1 st frame image is positive, the "frame number" in the table indicates the several frames, "continuous frame number" indicates the number of frames in which the polarity of the pixel is continuously the same, the "positive frame number" indicates the number of frames in which the polarity of the pixel is positive, the "negative frame number" indicates the number of frames in which the polarity of the pixel is negative, the "POL" indicates the potential of the polarity control signal, the "polarity" indicates the polarity of the pixel, the "inversion type" indicates the type in which the polarity of the pixel is inverted, Y "in the content column indicates that each line of data is the same as that of the previous frame image, n" in the content column indicates that each line of data is different from that of the previous frame image, f "in the content column indicates that part of line of data is the same as that of the previous frame image, and Y" in the action column indicates full screen, "N" in the action column indicates no refresh, and "F" in the action column indicates partial refresh.
The contents and operations corresponding to the respective frame images in table 1 and table 2 will be described by taking the contents and operations corresponding to the 5 th frame image and the 6 th frame image in table 1 as an example.
The content "Y/f/n" corresponding to the 5 th frame image in table 1 indicates that the data of the 6 th frame image is the same or partially the same or different for each line compared with the data of the 5 th frame image, and the action "Y" corresponding to the 6 th frame image indicates that the full-screen refresh is required when displaying no matter what the content of the 5 th frame image is.
The content "Y/F/N" corresponding to the 6 th frame image in table 1 indicates that the data of the 6 th frame image is the same or has a part of the same lines or is different from the data of the 5 th frame image in each line, the action "N/F/Y" corresponding to the 6 th frame image indicates that refresh is not required when the data of the 6 th frame image is the same as the data of the 5 th frame image in each line, only partial refresh is required when the data of the 6 th frame image is the same as the data of the 5 th frame image in each line, and full-screen refresh is required when the data of the 6 th frame image is not the same as the data of the 5 th frame image in each line.
| Number of frames | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Number of positive frames | 1 | 2 | 3 | 4 | 4 | 4 | 4 | 4 | 5 | 6 | 6 | 6 |
| Number of negative frames | 0 | 0 | 0 | 0 | 1 | 2 | 3 | 4 | 4 | 4 | 5 | 6 |
| Number of consecutive frames | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 | 1 | 2 | 1 | 2 |
| POL | Height of | Height of | Height of | Height of | Is low in | Is low in | Is low in | Is low in | Height of | Height of | Is low in | Is low in |
| Polarity | + | + | + | + | - | - | - | - | + | + | - | - |
| Of the reverse type | II | A | III | |||||||||
| Content providing method and apparatus | y/f | y/f | y/f | y/f/n | y/f/n | y/f/n | y/f/n | y/f/n | y/f | n | y/f/n | |
| Movement of | Y | N/F | N/F | N/F | Y | N/F/Y | N/F/Y | N/F/Y | Y | N/F | Y | N/F/Y |
TABLE 1
| Number of frames | 1 | 2 | 3 | 4 | 5 | 6 | 7 | 8 | 9 | 10 | 11 | 12 |
| Number of positive frames | 1 | 2 | 2 | 2 | 3 | 4 | 5 | 6 | 6 | 6 | 6 | 6 |
| Number of negative frames | 0 | 0 | 1 | 2 | 2 | 2 | 2 | 2 | 3 | 4 | 5 | 6 |
| Number of consecutive frames | 1 | 2 | 1 | 2 | 1 | 2 | 3 | 4 | 1 | 2 | 3 | 4 |
| POL | Height of | Height of | Height of | Height of | Is low in | Is low in | Height of | Height of | Height of | Is low in | Is low in | Is low in |
| Polarity | + | + | - | - | + | + | + | + | - | - | - | - |
| Of the reverse type | III | A | II | |||||||||
| Content providing method and apparatus | y/f | n | y/f/n | y/f/n | y/f | y/f | y/f | y/f/n | y/f/n | y/f/n | y/f/n | |
| Movement of | Y | N/F | Y | N/F/Y | Y | N/F | N/F | N/F | Y | N/F/Y | N/F/Y | N/F/Y |
TABLE 2
Further, taking a continuous 3-frame image as an example, how to implement the polarity inversion control and the data refresh control according to the embodiment of the present invention is specifically described.
In the first case:
as shown in FIG. 3a, assume that the polarity of each pixel of the n-1 th frame image is positive, and each row of pixels is refreshed during displaying; the data of the nth frame image is the same as the data of the (n-1) th frame image, and the polarity of each pixel of the nth frame image is the same as that of each pixel of the (n-1) th frame image, so that the source electrode driving circuit and the grid electrode driving circuit do not need to output signals when the nth frame image is displayed, and the potential of the polarity control signal POL does not need to be changed; each row of data of the (n + 1) th frame of image has no same row compared with the corresponding row of data of the (n) th frame of image, and the polarity of each pixel of the (n + 1) th frame of image is opposite to that of each pixel of the (n) th frame of image, so that when the (n-1) th frame of image is displayed, the potential of the polarity control signal POL needs to be changed, and the source driving circuit and the gate driving circuit both need to output signals. The corresponding timing diagram is shown in fig. 3 b.
In the second case:
as shown in FIG. 4a, assume that the polarities of the pixels of the n-1 th frame image are positive, and the pixels in each row are refreshed during displaying; each row of data of the nth frame of image has the same row in the area A and the area C compared with the corresponding row of data of the (n-1) th frame of image, does not have the same row in the area B, and the polarity of each pixel of the nth frame of image is the same as that of each pixel of the (n-1) th frame of image, so that the potential of the polarity control signal POL does not need to be changed when the nth frame of image is displayed, the output signals are not needed for the area A, the area C, the area source electrode driving circuit and the area C, and the area B, the area source electrode driving circuit and the area B, the area C, and the area B, the; each row of data of the (n + 1) th frame of image has no same row compared with the corresponding row of data of the (n) th frame of image, and the polarity of each pixel of the (n + 1) th frame of image is opposite to that of each pixel of the (n) th frame of image, so that when the (n-1) th frame of image is displayed, the potential of the polarity control signal POL needs to be changed, and the source driving circuit and the gate driving circuit both need to output signals. The corresponding timing diagram is shown in fig. 4 b.
Wherein, in fig. 3b and 4b, "STV" represents a trigger signal for the start of each frame; "OE 1" represents a control signal for a gate driver circuit output signal, where a high level indicates that the gate driver circuit is not outputting a signal and a low level indicates that the gate driver circuit is outputting a signal; "POL" represents a polarity control signal; "Source-output" represents a signal output by the Source driver circuit; "Vcom" represents a common voltage.
Based on the same inventive concept, an embodiment of the present invention further provides a liquid crystal display, as shown in fig. 5, including: the control module 01, the source electrode drive circuit 02 and the grid electrode drive circuit 03; wherein,
the control module 01 is used for judging the polarity of each line of data corresponding to the nth frame of image to be displayed, and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed or not;
when it is determined that the polarity of each line of data corresponding to the nth frame of image needs to be reversed, the control module 01 is further configured to control the polarity of each line of data corresponding to the frame of image to be displayed to be reversed through the source driving circuit 02; the control module 01 is further configured to control the source driving circuit 02 and the gate driving circuit 03 to perform full-screen refreshing according to each row of data after the polarity inversion so as to display a frame image to be displayed;
when it is determined that the polarity of each row of data corresponding to the nth frame of image does not need to be inverted, the control module 01 is further configured to compare each row of the frame of image to be displayed with the data of the row corresponding to the previous frame of displayed image, determine a row in the frame of image to be displayed, where the data is different from the data of the row corresponding to the previous frame of displayed image, as a changed row, and refresh only the changed row by controlling the source driving circuit 02 and the gate driving circuit 03.
In the liquid crystal display device provided in the embodiment of the present invention, the control module determines the polarity of each line of data corresponding to the nth frame of image to be displayed, and compares whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be inverted; when the inversion is determined to be needed, controlling the source electrode driving circuit to control the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and controlling the source electrode driving circuit and the grid electrode driving circuit to perform full-screen refreshing according to each row of data after the polarity is inverted so as to display the frame image to be displayed; and when the inversion is determined not to be needed, comparing the data of each row of the frame image to be displayed with the data of the row corresponding to the displayed image of the previous frame, determining the row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row by controlling the source electrode driving circuit and the grid electrode driving circuit. Therefore, when two frames of images with the same polarity corresponding to the row data have rows with the same data, the rows with the same data do not need to be refreshed when the next frame of image in the two adjacent frames of images is displayed, so that the data needing to be refreshed when one frame of image is displayed is reduced, and the display power consumption is further reduced. Therefore, compared with the prior art, the liquid crystal display can achieve the effect of reducing power consumption even if partial rows in two adjacent frames of images are the same, and the liquid crystal display achieves the purpose of reducing the power consumption by reducing the refreshing data quantity, and compared with the purpose of reducing the transmission data quantity in the prior art, the liquid crystal display achieves the purpose of reducing the power consumption by reducing the refreshing data quantity to a greater extent.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is further configured to, when the number of the changed rows is zero, control the gate driving circuit to turn off the switching elements in the pixels in each row through the timing controller, and control the source driving circuit not to output data in each row, so that the pixels in each row maintain data in each row of the n-1 th frame image.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is further configured to, when it is determined that the number of the changed rows is not zero, control the gate driving circuit through the timing controller to turn on the switching elements of the pixels in the corresponding row and turn off the switching elements in the pixels in the other rows, and control the source driving circuit to output the data signals of the changed rows and control the pixels in the other rows to maintain the data of each row of the n-1 th frame image.
In a specific implementation, in the liquid crystal display provided in the embodiment of the present invention, the control module may be integrated on the timing controller, or may be separately configured, which is not limited herein.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is integrated on the timing controller.
Preferably, in the liquid crystal display provided in the embodiment of the present invention, the control module is specifically configured to: searching the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to the (n-1) th frames aiming at any pixel on the display device; if the number of the positive and negative polarities of the pixels is the same, determining the polarity of each row of data corresponding to a frame image to be displayed, comparing the polarities of each row of data corresponding to a displayed image of a previous frame, and determining the inversion as a first type inversion; if the number of the positive and negative polarities of the pixels is different, judging whether the polarities of the pixels of the (n-M) -th to (n-1) th frames are the same, if so, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal to be a second type reversal, otherwise, determining the type of the last reversal before the frame image to be displayed; if the type of the last inversion before the frame image to be displayed is determined to be the first type inversion or not, comparing the data of each line of the frame image to be displayed with the data of the corresponding line of the displayed image of the previous frame; if the comparison result is that the rows with the same data exist, determining that the polarity of the data of each row does not need to be inverted when the frame image to be displayed is displayed; if the comparison result does not have the rows with the same data, determining that the polarity of the data of each row corresponding to the frame image to be displayed needs to be reversed compared with the polarity of the data of each row corresponding to the displayed image of the previous frame, and determining the reversal as the third type reversal; if the type of the last inversion before the frame image to be displayed is determined to be the second type inversion or the third type inversion, determining that the polarity of each line of data corresponding to the frame image to be displayed does not need to be inverted compared with the polarity of each line of data corresponding to the displayed image of the previous frame; wherein M is an integer of 1 to 16.
The image display method and the liquid crystal display provided by the embodiment of the invention judge the polarity of each line of data corresponding to the nth frame of image to be displayed, and compare whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed; if so, controlling the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and refreshing the data of each row in a full screen mode according to the inverted polarity so as to display the frame image to be displayed; if not, comparing the data of each row of the frame image to be displayed with the data of the row corresponding to the displayed image of the previous frame, determining the row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row. Therefore, when two frames of images with the same polarity of corresponding row data have rows with the same data, the rows with the same data do not need to be refreshed when the next frame of image in the two adjacent frames of images is displayed, so that the power consumption of the refreshed images can be effectively reduced, and the power consumption of image display can be further effectively reduced. Therefore, compared with the prior art, the image display method can achieve the effect of reducing power consumption even if partial rows in two adjacent frames of images are the same, and compared with the prior art which achieves the purpose of reducing power consumption by reducing the quantity of transmission data, the image display method achieves the purpose of reducing power consumption by reducing the quantity of refresh data, the degree of reducing power consumption by reducing the quantity of refresh data is larger.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (8)
1. An image display method, comprising:
judging the polarity of each line of data corresponding to the nth frame of image to be displayed, and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed or not; wherein n is a positive integer not less than 1;
if so, controlling the polarity of each row of data corresponding to the frame image to be displayed to be inverted, and refreshing the data in full screen according to each row of data after the polarity inversion so as to display the frame image to be displayed;
otherwise, comparing the data of each row of the frame image to be displayed with the data of the row corresponding to the displayed image of the previous frame, determining the row in the frame image to be displayed, which is different from the data of the row corresponding to the displayed image of the previous frame, as a changed row, and only refreshing the changed row;
judging the polarity of each line of data corresponding to the nth frame of image to be displayed, and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed or not, specifically:
searching the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to the (n-1) th frames aiming at any pixel on the display device;
if the number of the positive and negative polarities of the pixels is the same, determining that the polarity of each row of data corresponding to the frame image to be displayed needs to be reversed, and determining the reversal as first type reversal;
if the number of the positive and negative polarities of the pixels is different, judging whether the polarities of the pixels of the (n-M) th to (n-1) th frames are the same, if so, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal as second type reversal, otherwise, determining the type of the last reversal before the frame image to be displayed;
if the last inversion type before the frame image to be displayed is determined to be the first type inversion or not, comparing the data of each line of the frame image to be displayed with the data of the corresponding line of the displayed image of the previous frame; if the comparison result is that the rows with the same data exist, determining that the polarity of the data of each row does not need to be inverted when the frame image to be displayed is displayed; if the comparison result does not have the rows with the same data, determining that the polarity of the data of each row corresponding to the frame image to be displayed needs to be reversed compared with the polarity of the data of each row corresponding to the displayed image of the previous frame, and determining the reversal as a third type reversal;
if the last inversion type before the frame image to be displayed is determined to be the second type inversion or the third type inversion, determining that the polarity of each line of data corresponding to the frame image to be displayed does not need to be inverted compared with the polarity of each line of data corresponding to the displayed image of the previous frame; wherein M is an integer of 1 to 16.
2. The image display method according to claim 1, further comprising:
and if the number of the changed rows is zero, the time sequence controller controls the gate drive circuit to close the switch elements in the pixels of each row, and controls the source drive circuit not to output data of each row, so that the pixels of each row keep data of each row of the n-1 th frame image.
3. The image display method according to claim 1 or 2, wherein a row in the frame image to be displayed, in which data is different from data of a row corresponding to the displayed image of the previous frame, is determined as a changed row, and only the changed row is refreshed, specifically:
and the time sequence controller controls the grid driving circuit to enable the switching elements of the pixels of the corresponding row to be turned on and the switching elements of the pixels of other rows to be turned off, and controls the source driving circuit to only output the data signals of the changed row and controls the pixels of other rows to keep the data of each row of the n-1 th frame image.
4. The image display method according to claim 3, wherein the searching for the positive or negative of the polarity of the pixel corresponding to the displayed image of the 1 st to n-1 st frames specifically comprises:
acquiring the number of frames with positive polarity and the number of frames with negative polarity of the recorded pixels, determining the number of frames with positive polarity and the number of frames with negative polarity of the recorded pixels, and if the number of frames with positive polarity of the recorded pixels is equal to the number of frames with negative polarity, determining that the number of positive polarities and the number of negative polarities of the pixels corresponding to the displayed images of the 1 st to the (n-1) th frames are the same;
determining the number of recorded frames with positive polarity and the number of recorded frames with negative polarity of the pixels, specifically:
determining the polarity of the pixel corresponding to the displayed image of the (n-1) th frame, if the polarity of the pixel corresponding to the displayed image of the (n-1) th frame is positive, adding 1 to the frame number of the recorded pixel with the positive polarity, and if the polarity of the pixel corresponding to the displayed image of the (n-1) th frame is negative, adding 1 to the frame number of the recorded pixel with the negative polarity, wherein the initial value of the frame number of the recorded pixel with the positive polarity and the initial value of the frame number of the recorded pixel with the negative polarity are both 0.
5. A liquid crystal display, comprising: the control module, the source electrode driving circuit and the grid electrode driving circuit;
the control module is used for judging the polarity of each line of data corresponding to the nth frame of image to be displayed and comparing whether the polarity of each line of data corresponding to the displayed image of the (n-1) th frame needs to be reversed or not;
when it is determined that the polarity of each line of data corresponding to the nth frame of image needs to be reversed, the control module is further configured to control the polarity of each line of data corresponding to the frame of image to be displayed to be reversed through the source driving circuit; the control module is also used for controlling the source electrode drive circuit and the grid electrode drive circuit to carry out full-screen refreshing according to the data of each row after the polarity inversion so as to display the frame image to be displayed;
when it is determined that the polarity of each row of data corresponding to the nth frame of image does not need to be inverted, the control module is further configured to compare each row of the frame of image to be displayed with the data of the row corresponding to the previous frame of displayed image, determine, as a changed row, a row in the frame of image to be displayed in which the data is different from the data of the row corresponding to the previous frame of displayed image, and only refresh the changed row by controlling the source driving circuit and the gate driving circuit;
wherein the control module is specifically configured to: searching the positive and negative of the polarity of the pixel corresponding to the displayed image of the 1 st to the (n-1) th frames aiming at any pixel on the display device; if the number of the positive and negative polarities of the pixels is the same, determining the polarity of each line of data corresponding to the frame image to be displayed, comparing the polarity of each line of data corresponding to the displayed image of the previous frame, and needing to be reversed, and determining the reversal as the first type reversal; if the number of the positive and negative polarities of the pixels is different, judging whether the polarities of the pixels of the (n-M) th to (n-1) th frames are the same, if so, determining that the polarity of the frame image to be displayed needs to be reversed, and determining the reversal as second type reversal, otherwise, determining the type of the last reversal before the frame image to be displayed; if the last inversion type before the frame image to be displayed is determined to be the first type inversion or not, comparing the data of each line of the frame image to be displayed with the data of the corresponding line of the displayed image of the previous frame; if the comparison result is that the rows with the same data exist, determining that the polarity of the data of each row does not need to be inverted when the frame image to be displayed is displayed; if the comparison result does not have the rows with the same data, determining that the polarity of the data of each row corresponding to the frame image to be displayed needs to be reversed compared with the polarity of the data of each row corresponding to the displayed image of the previous frame, and determining the reversal as a third type reversal; if the last inversion type before the frame image to be displayed is determined to be the second type inversion or the third type inversion, determining that the polarity of each line of data corresponding to the frame image to be displayed does not need to be inverted compared with the polarity of each line of data corresponding to the displayed image of the previous frame; wherein M is an integer of 1 to 16.
6. The liquid crystal display of claim 5, wherein the control module is further configured to, when the number of the changed rows is zero, control the gate driving circuit to turn off the switching elements in the pixels of each row through the timing controller, and control the source driving circuit not to output the data of each row, so that the pixels of each row maintain the data of each row of the n-1 th frame image.
7. The liquid crystal display of claim 5, wherein the control module is further configured to control the gate driving circuit to turn on the switching elements of the pixels of the corresponding row and turn off the switching elements of the pixels of the other rows by the timing controller when it is determined that the number of the changed rows is not zero, and to control the source driving circuit to output the data signals of the changed rows and to control the pixels of the other rows to maintain the data of the rows of the n-1 th frame image.
8. The liquid crystal display of claim 6 or 7, wherein the control module is integrated with the timing controller.
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| CN106297683B (en) * | 2015-05-29 | 2018-11-30 | 奇景光电股份有限公司 | Sequence controller and its control method |
| CN105654917B (en) * | 2016-04-08 | 2018-03-30 | 京东方科技集团股份有限公司 | Polarity reversal driving method, data driver and liquid crystal panel |
| KR102470656B1 (en) * | 2016-04-08 | 2022-11-25 | 삼성디스플레이 주식회사 | Display apparatus and driving method thereof |
| CN107093609B (en) * | 2017-05-16 | 2019-10-29 | 京东方科技集团股份有限公司 | Array substrate, display panel, display device and driving method |
| CN107038998A (en) * | 2017-06-27 | 2017-08-11 | 芯颖科技有限公司 | Display driving method, device and system |
| CN107958655A (en) * | 2018-01-05 | 2018-04-24 | 京东方科技集团股份有限公司 | A kind of liquid crystal display and pixel unit |
| CN110648636B (en) * | 2018-06-26 | 2020-07-31 | 京东方科技集团股份有限公司 | Display control method, display device, storage medium, and computer apparatus |
| CN108648713A (en) * | 2018-06-29 | 2018-10-12 | 上海天马微电子有限公司 | Image display method, liquid crystal display and display device |
| CN108877731B (en) * | 2018-09-20 | 2021-08-24 | 京东方科技集团股份有限公司 | Display panel driving method and display panel |
| CN114267295A (en) * | 2020-09-16 | 2022-04-01 | Oppo（重庆）智能科技有限公司 | Display driving method, display driving device, electronic device and readable storage medium |
| CN114283762A (en) * | 2021-12-22 | 2022-04-05 | 南京阿吉必信息科技有限公司 | Dynamic refreshing display driving method, server and storage medium |
| CN114333729B (en) * | 2021-12-30 | 2023-03-31 | 昆山龙腾光电股份有限公司 | Liquid crystal display module, display control circuit and method thereof, and liquid crystal display device |
| CN114822431A (en) * | 2022-03-23 | 2022-07-29 | 重庆惠科金渝光电科技有限公司 | Display panel driving method, device and computer readable storage medium |
| WO2024050678A1 (en) * | 2022-09-06 | 2024-03-14 | 卓永红 | Low-power-consumption processing apparatus and method for providing image data to display, and device |
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