CN109785803B - Display method, display unit and display - Google Patents
Display method, display unit and display Download PDFInfo
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Abstract
The invention discloses a display method, which is suitable for displaying a pixel matrix, wherein the pixel matrix comprises a plurality of sub-pixels arranged in a matrix, and the voltage applied to the sub-pixels is reversed in polarity once every two scanning lines along the direction of a data line; wherein the method comprises the following steps: obtaining a compensation pixel value; adjusting a first pixel value to be displayed of a current frame of the sub-pixel to be compensated into a second pixel value according to the compensation pixel value; and loading a second data driving signal corresponding to the second pixel value to the data line during the compensation time, and loading a first data driving signal corresponding to the first pixel value to the data line outside the compensation time. The display method can ensure that the storage capacitor of the sub-pixel to be compensated is fully and quickly charged in the first period of scanning time after the polarity is reversed and can be stably discharged in the subsequent period, thereby overcoming the phenomenon of horizontal bright and dark lines and improving the picture quality.
Description
Technical Field
The invention belongs to the field of liquid crystal display, and particularly relates to a display method, a display unit and a display.
Background
A Liquid Crystal Display (LCD) is a type of Display that is mainly used in televisions and computers. The LCD is constructed by placing a liquid crystal cell between two parallel glass substrates, arranging a Thin Film Transistor (TFT) on the lower substrate glass, arranging a color filter on the upper substrate glass, and controlling the rotation direction of liquid crystal molecules by changing the signal and voltage on the TFT, thereby controlling whether polarized light of each pixel point is emitted or not to achieve the display purpose. The display structure of the LCD includes a passive matrix type and an active matrix type, wherein, the active matrix type TFT-LCD is the mainstream application. Because the liquid crystal material needs to be driven by alternating current, when the liquid crystal screen is driven, the voltage applied to each pixel point needs to be subjected to polarity inversion.
In the active matrix TFT-LCD driving method, the pixel color loaded on the data line at the time before the polarity inversion is different from the pixel color loaded on the data line at the time after the polarity inversion, and in order to display a pure color, the voltage loaded on each signal line needs to be turned on or off according to the corresponding color rule, so that only one color is displayed. However, when the polarity inversion requires the turn-on voltage, the voltage gradually changes from 0 to a predetermined value, the voltage applied to the storage capacitor of the corresponding pixel in the process changes obviously, the charging stability is poor, the charging is insufficient, the subsequent discharging voltage is unstable, the gray scale is low, and distortion is easily caused.
Disclosure of Invention
In order to solve the above problems in the prior art, the present invention provides a display method, a display unit, and a display, which can improve image quality and reduce distortion. The technical problem to be solved by the invention is realized by the following technical scheme:
a display method is suitable for displaying a pixel matrix, the pixel matrix comprises a plurality of sub-pixels arranged in a matrix, and the polarity of the voltage applied to the sub-pixels is reversed once every two scanning lines along the direction of a data line; wherein the method comprises the following steps:
obtaining a compensation pixel value;
adjusting a first pixel value to be displayed of a current frame of the sub-pixel to be compensated into a second pixel value according to the compensation pixel value;
and loading a second data driving signal corresponding to the second pixel value to the data line during the compensation time, and loading a first data driving signal corresponding to the first pixel value to the data line outside the compensation time.
Further, the obtaining compensated pixel values comprises:
obtaining a compensation pixel value according to a front pixel value displayed by a front sub-pixel of the sub-pixel to be compensated and a first pixel value displayed by the sub-pixel to be compensated; the compensation pixel value compensation method specifically comprises the following steps:
when P ═ C, VP,C＝Vmin；
When P is Pmax and C is Cmin, V isP,C＝Vmax；
When P is Pmin and C is Cmax, VP,C＝Vmax；
When C is more than P, Vmin is less than or equal to VP,C≤VP-1,C≤Vmax；Vmin≤VP,C-1≤VP,C≤Vmax；
When C is less than P, Vmax is more than or equal to VP,C≥VP-1,C≥Vmin；Vmax≥VP,C-1≥VP,C≥Vmin；
Wherein P represents a pre-imagePixel value, C denotes a first pixel value, VP,CRepresents a signal compensation value when the pre-pixel value is P and the first pixel value is C, Pmax represents a maximum pre-pixel value, Pmin represents a minimum pre-pixel value, Cmax represents a maximum first pixel value, Cmin represents a minimum first pixel value, Vmax represents a maximum signal compensation value, and Vmin represents a minimum signal compensation value.
Further, adjusting the first pixel value to be displayed of the current frame of the sub-pixel to be compensated to the second pixel value according to the compensated pixel value comprises: and adding the compensation pixel value and the first pixel value to obtain the second pixel value.
Further, after the polarity is reversed, the current row scanning signal is driven to be loaded to the sub-pixel to be compensated, and a second data driving signal corresponding to a second pixel value is loaded to the current column data line corresponding to the sub-pixel to be compensated within the scanning time of the sub-pixel to be compensated.
Further, the compensation time is equal to the scanning time of the sub-pixel to be compensated displayed in one frame of image.
Further, when the current row scanning signal stops being loaded to the sub-pixel to be compensated, the next row scanning signal is driven to be loaded to the next sub-pixel, and a first data driving signal corresponding to a first pixel value is loaded to the current column data line corresponding to the sub-pixel to be compensated, wherein the sub-pixel to be compensated and the next sub-pixel are located in the same column.
Further, the voltage applied to the sub-pixels is reversed in polarity every two scanning lines along the data line direction;
in the display of one frame of picture, when starting to load the scanning signal to the 2N-1 th scanning line, load the second data driving signal corresponding to the second pixel value to the said data link; when loading a scanning signal to the 2N scanning line is started, a first data driving signal corresponding to a first pixel value is loaded to the data line, wherein N is a positive integer.
The invention also provides a display unit, which is suitable for displaying a pixel matrix, wherein the pixel matrix comprises a plurality of sub-pixels arranged in a matrix, and the voltage applied to the sub-pixels is reversed in polarity once every two scanning lines along the direction of a data line; the method comprises the following steps: the data driving circuit and the scanning driving circuit are both connected with the time sequence controller, and the memory is connected with the time sequence controller; wherein:
the time sequence controller is used for acquiring a compensation pixel value, and adjusting a first pixel value to be displayed of a current frame of the sub-pixel to be compensated into a second pixel value according to the compensation pixel value;
the time schedule controller is also used for controlling the data driving circuit to load a second data driving signal corresponding to a second pixel value to the data line in the compensation time, and controlling the data driving circuit to load a first data driving signal corresponding to a first pixel value to the data line outside the compensation time; wherein the memory has the compensated pixel value stored therein.
Further, the obtaining compensated pixel values comprises:
obtaining a compensation pixel value according to a front pixel value displayed by a front sub-pixel of the sub-pixel to be compensated and a first pixel value displayed by the sub-pixel to be compensated; the compensation pixel value compensation method specifically comprises the following steps:
when P ═ C, VP,C＝Vmin；
When P is Pmax and C is Cmin, V isP,C＝Vmax；
When P is Pmin and C is Cmax, VP,C＝Vmax；
When C is more than P, Vmin is less than or equal to VP,C≤VP-1,C≤Vmax；Vmin≤VP,C-1≤VP,C≤Vmax；
When C is less than P, Vmax is more than or equal to VP,C≥VP-1,C≥Vmin；Vmax≥VP,C-1≥VP,C≥Vmin；
Where P represents the previous pixel value, C represents the first pixel value, VP,CRepresents a signal compensation value when the pre-pixel value is of a size P and the first pixel value is of a size C, Pmax represents a maximum pre-pixel value, Pmin represents a minimum pre-pixel value, Cmax represents a maximum first pixel value,cmin denotes a minimum first pixel value, Vmax denotes a maximum signal compensation value, and Vmin denotes a minimum signal compensation value.
Further, adjusting the first pixel value to be displayed of the current frame of the sub-pixel to be compensated to the second pixel value according to the compensated pixel value comprises: and adding the compensation pixel value and the first pixel value to obtain the second pixel value.
Further, after the polarity is reversed, the timing driver controls the scan driving circuit to drive a current row scan signal to be loaded to a sub-pixel to be compensated, and controls the data driving circuit to load a second data driving signal corresponding to a second pixel value to a current column data line corresponding to the sub-pixel to be compensated within a scan time of the sub-pixel to be compensated.
Further, the compensation time is equal to the scanning time of the sub-pixel to be compensated displayed in one frame of image.
Further, when the current row scanning signal stops being loaded to the sub-pixel to be compensated, the timing driver controls the scanning driving circuit to drive the next row scanning signal to be loaded to the next sub-pixel, and controls the data driving circuit to load the first data driving signal corresponding to the first pixel value to the current column data line corresponding to the sub-pixel to be compensated, wherein the sub-pixel to be compensated and the next sub-pixel are located in the same column.
Further, the voltage applied to the sub-pixels is reversed in polarity every two scanning lines along the data line direction;
in the display of one frame of picture, when the time sequence driver controls the scanning driving circuit to start loading the scanning signal to the 2N-1 th scanning line, the time sequence driver controls the data driving circuit to load a second data driving signal corresponding to a second pixel value to the data line; when the time sequence driver controls the scanning driving circuit to start loading scanning signals to the 2N scanning line, the time sequence driver controls the data driving circuit to load a first data driving signal corresponding to a first pixel value to the data line, wherein N is a positive integer.
The invention also provides a display comprising at least one display unit according to the invention.
Compared with the prior art, the invention has the beneficial effects that:
according to the display method, the data driving signals applied to the sub-pixels to be compensated are compensated in the compensation time, so that the storage capacitors of the sub-pixels to be compensated can be fully and quickly charged in the first scanning time after the polarity is reversed, each storage capacitor of the pixel matrix can be stably discharged subsequently, the phenomenon of horizontal bright and dark lines is overcome, and the picture quality is improved.
Drawings
Fig. 1 is a schematic flow chart of a display method according to an embodiment of the present invention;
FIG. 2 is a diagram illustrating a relationship between a pixel value and a driving voltage according to an embodiment of the present invention;
fig. 3 is a partially enlarged schematic view of a pixel matrix according to an embodiment of the invention;
FIG. 4 is a schematic diagram of the signal driving timing of FIG. 3 operating under the prior art;
FIG. 5 is a schematic diagram of a 2-column inversion driving method according to an embodiment of the present invention;
FIG. 6 is a schematic diagram of a signal driving timing sequence of a display method according to an embodiment of the present invention;
fig. 7 is a block diagram of a display unit according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to specific examples, but the embodiments of the present invention are not limited thereto.
Example 1:
fig. 1 is a schematic flow chart of a display method according to an embodiment of the present invention, which is suitable for displaying a pixel matrix, where the pixel matrix includes a plurality of sub-pixels arranged in a matrix, and a voltage applied to the sub-pixels is inverted in polarity every two scanning lines along a data line direction; wherein the method comprises the following steps:
obtaining a compensation pixel value;
adjusting a first pixel value to be displayed of a current frame of the sub-pixel to be compensated into a second pixel value according to the compensation pixel value;
and loading a second data driving signal corresponding to the second pixel value to the data line during the compensation time, and loading a first data driving signal corresponding to the first pixel value to the data line outside the compensation time.
Specifically, when the pixel matrix displays, the pixel value of the sub-pixel is a gray scale value, and different gray scale values correspond to different voltage values, that is, different voltage values loaded on the sub-pixel, and the brightness displayed by the sub-pixel is different, referring to fig. 2, for example, taking 8-bit gray scale as an example, 8-bit total generated value is 0-255, each gray scale corresponds to different gray scale voltage values V0-V255, each gray scale corresponds to a pixel value, specifically, the invention can adopt 10-bit gray scale value to display, 10-bit can generate 0-1023 different gray scale voltage values, so as to compensate the first data driving signal, and load the voltage value corresponding to the second pixel value obtained after compensation, the first pixel value represents the original pixel value before uncompensation, in actual work, except the pixel value of the sub-pixel at the first scanning time, the pixel values of other scanning times need to be compensated according to the previous pixel value, that is, the first pixel value refers to the original pixel value before uncompensation of each frame, and is not related to the size of the actual display of the previous pixel value. In addition, the specific generation of gray scale values is the prior art, and is not described herein again, for example, a Frame Rate Control (FRC) technique is used to generate 10-bit and 12-bit gray scale values.
In the polarity inversion process, the polarity of the voltage applied to the pixel units corresponding to the data line and the scanning line is changed, when the previous pixel value of the sub-pixel is different from the current pixel value, the storage capacitor in the pixel can be unstable in charging, so that the storage capacitor is insufficiently charged, the gray scale is lower due to insufficient voltage in the subsequent power supply process of the storage capacitor to the pixel units, and the other two pixel units adjacent to the pixel unit in the same column do not need to be subjected to the overvoltage change process, so that the situation that the storage capacitor is insufficiently charged cannot occur. Therefore, the displayed image has bright and dark lines arranged in dark-bright-dark sequence when viewed from the whole pixel matrix.
Specifically, fig. 3 adopts a 2-line inversion driving method to perform polarity inversion, taking the display of pure green as an example, in the first two scanning times (scanning line 1 and scanning line 2), the signal line 1 is responsible for green pixels, and in the second two scanning times (scanning line 3 and scanning line 4) after polarity inversion, the signal line 2 is responsible for red pixels.
Referring to the driving waveform diagram shown in fig. 4, during pure green display, only the green pixels can be turned on at the same time, and the signal line 1 corresponding to the row 1 needs to be loaded with voltage before the polarity inversion because the pixels in the previous scanning time are red, and the signal line 1 needs to be loaded with voltage after the polarity inversion because the pixels in the previous scanning time are red.
The scheme of the invention can be applied to not only compensate different sub-pixels in different scanning time in the frame, but also compensate the same sub-pixel in different frames in the inter-frame.
If the method is applied in a frame, generally, due to the factor of polarity inversion, a data signal loaded on a data line cannot reach a voltage corresponding to a preset first pixel value after each polarity inversion, so that the charging capacitor is insufficiently charged, the subsequent discharging voltage is unstable, the gray scale is lower than the original display gray scale, and distortion is easily caused. Therefore, the voltage loaded to the sub-pixel in the adjacent scanning time is compared, the voltage applied to the current sub-pixel is correspondingly compensated, the storage capacitor of the sub-pixel to be compensated can be fully and quickly charged in the first scanning time after the polarity is reversed, each storage capacitor of the pixel matrix can be stably discharged subsequently, the horizontal bright and dark line phenomenon is overcome, and the picture quality is improved.
Example 2:
in a specific implementation manner of this embodiment, the obtaining the compensated pixel value includes:
obtaining a compensation pixel value according to a front pixel value displayed by a front sub-pixel of the sub-pixel to be compensated and a first pixel value displayed by the sub-pixel to be compensated; the compensation pixel value compensation method specifically comprises the following steps:
when P ═ C, VP,C＝Vmin；
When P is Pmax and C is Cmin, V isP,C＝Vmax；
When P is Pmin and C is Cmax, VP,C＝Vmax；
When C is more than P, Vmin is less than or equal to VP,C≤VP-1,C≤Vmax；Vmin≤VP,C-1≤VP,C≤Vmax；
When C is less than P, Vmax is more than or equal to VP,C≥VP-1,C≥Vmin；Vmax≥VP,C-1≥VP,C≥Vmin；
Where P represents the previous pixel value, C represents the first pixel value, VP,CRepresents a signal compensation value when the pre-pixel value is P and the first pixel value is C, Pmax represents a maximum pre-pixel value, Pmin represents a minimum pre-pixel value, Cmax represents a maximum first pixel value, Cmin represents a minimum first pixel value, Vmax represents a maximum signal compensation value, and Vmin represents a minimum signal compensation value.
In order to better describe the compensation relationship, the present invention is described by using a specific example, referring to table 1, where table 1 is an example of a compensation table, and a current pixel value in table one is a first pixel value. As described above, for the sub-pixel to be compensated, in one frame, the pixel value of the pixel block to be loaded is referred to as the current pixel value, the pixel value loaded on the previous pixel block in the corresponding column of the pixel block is referred to as the previous pixel value, and in one frame, the previous pixel value is loaded on the previous pixel block at the previous time, and the current pixel value is loaded on the pixel block to be loaded at the current time. That is, the current pixel value corresponds to the sub-pixel to be compensated, and the previous pixel value corresponds to the previous pixel in the corresponding column of the sub-pixel block to be compensated. In this example, the first pixel value is 8-bit gray scale value, and after compensation, since the second pixel value may be larger than 255, 10 bits are used for output.
In table 1, the compensation value, where C ═ P is reflected in the table, is a diagonal value, that is, if the previous pixel value is equal to the current pixel value, it indicates that the display gray scale is unchanged before and after, and therefore, no compensation is needed, for example, in fig. 4, the voltage applied to row 3 and the voltage applied to row 4 by signal line 2 are both V +255, and no compensation is needed for row 4; c>The compensation value with P reflected in the table is the lower triangle of the diagonal line, that is, when the current pixel value is greater than the previous pixel value, it indicates that the current gray scale is greater than the previous gray scale, and because of the gray scale difference, if not compensated, the charging may be sufficient to generate bright and dark lines, when the specific compensation is performed, when the current pixel value is certain, the previous pixel value is larger, indicating that the two are closer, the compensation value is decreased to 0, when the previous pixel value is certain, the current pixel value is smaller, the compensation value is decreased to 0, and when P Pmax is 255 and C is Cmin is 1, at one pole point, VP is equal to 1,CVmax 15; since the compensation values in table 1 are symmetrical about a diagonal line of C ═ P, the compensation values in the case of C < P correspond to those in the case of C > P, and at one extreme point, when P ═ Pmin ═ 1 and C ═ Cmax ═ 255, V is equal to V ═ C ═ 255, V ═ CP,CFor example, in fig. 4, the voltage value applied to the row 2 by the signal line 2 is 0, and the voltage applied to the row 3 is V +255, so that the compensation value Vmax is 15. Of course, the specific values listed in table 1 are only an example, and any value satisfying the above formula of the present invention may be used as the compensation pixel value.
Current pixel value
TABLE 1
In a specific embodiment, adjusting a first pixel value to be displayed of a current frame of sub-pixels to be compensated to a second pixel value according to the compensated pixel value includes: and adding the compensation pixel value and the first pixel value to obtain the second pixel value.
As described above, if the previous pixel value is 2 and the current pixel value is 254, the pixel compensation value is 11, that is, the first pixel value is 254 and the compensation pixel value is 11, the second pixel value is 254+ 11-265 is obtained, and the grayscale voltage V265 corresponding to the pixel value 265 is loaded.
In one embodiment, after the polarity inversion, the driving current row scanning signal is loaded to the sub-pixel to be compensated, and the second data driving signal corresponding to the second pixel value is loaded to the current column data line corresponding to the sub-pixel to be compensated within the scanning time of the sub-pixel to be compensated.
In a specific embodiment, the compensation time is equal to the scanning time of the sub-pixel to be compensated in one frame of image display.
In one embodiment, when a current row scanning signal stops being loaded to a sub-pixel to be compensated, a next row scanning signal is driven to be loaded to a next sub-pixel, and a first data driving signal corresponding to a first pixel value is loaded to a current column data line corresponding to the sub-pixel to be compensated, wherein the sub-pixel to be compensated and the next sub-pixel are located in the same column.
Since the compensation of the sub-pixel is performed by replacing the original first pixel value with the compensated second pixel value, only the voltage value is changed, and the scan timing is not affected, if the compensation time is not equal to the scan time, the driving timing must be manually reset to the external timing, which is more complicated and not beneficial, in order to not destroy the original timing, in a preferred embodiment, the compensation time of the present invention is equal to the time loaded to the pixel in one frame, i.e., the scan time of the sub-pixel to be compensated in one frame of image display.
According to the display method, the data driving signals applied to the sub-pixels to be compensated are compensated in the compensation time, so that the storage capacitors of the sub-pixels to be compensated can be fully and quickly charged in the first scanning time after the polarity is reversed, each storage capacitor of the pixel matrix can be stably discharged subsequently, the phenomenon of horizontal bright and dark lines is overcome, and the picture quality is improved.
Example 3:
in this embodiment, a 2-column inversion (2-line inversion) driving manner is described, as shown in fig. 5, when viewed from a certain column, the polarities of the first row pixel units and the second row pixel units are the same, the polarities of the third row pixel units and the fourth row pixel units are opposite to the polarities of the first row and the second row pixel units, when viewed from a certain row, the polarities of the data lines are alternately inverted, and so on, when viewed from a whole, the pixels of the pixel matrix are polarity inverted every two scanning lines along the data line direction, and the polarities of the data lines are column inverted, that is, the polarities are exchanged once per column along the scanning line direction.
The polarity of the voltage applied to the sub-pixel is reversed once every two scanning lines along the direction of the data line;
referring specifically to fig. 6, in the display of one frame of picture, when the timing driver controls the scan driving circuit to start loading the scan signal onto the 2N-1 th scan line, the timing driver controls the data driving circuit to load the second data driving signal corresponding to the second pixel value onto the data line, i.e., the line segment denoted by the symbol a in fig. 6; when the timing driver controls the scan driving circuit to start loading the scan signal onto the 2N-th scan line, the timing driver controls the data driving circuit to load the first data driving signal corresponding to the first pixel value onto the data line, i.e., the line segment denoted by symbol b in fig. 6, where N is a positive integer.
In this embodiment, the 2N-1 scan line refers to an odd-numbered row, the 2N refers to an even-numbered row below the odd-numbered row, in a frame, signals loaded on the scan lines are sequentially loaded from the first row to the last row, correspondingly, signals loaded on the data lines are also loaded from the first column to the last column, corresponding to embodiment 1, the 2N-1 scan line refers to scan signals applied to sub-pixels of a current row, i.e., the first and third scan lines, the 2N scan lines refer to scan signals applied to sub-pixels of a next row of the current row, i.e., the first and fourth scan lines, the scanning mode of the pixels is progressive scanning, and thus the data signals are also corresponding sub-pixels loaded on the scan row, and the current column corresponds to the column of the sub-pixels.
Example 4:
referring to fig. 7, the present invention also provides a display unit suitable for displaying a pixel matrix, where the pixel matrix 75 includes a plurality of sub-pixels arranged in a matrix, and voltages applied to the sub-pixels are polarity-inverted every two scanning lines along a data line direction; the method comprises the following steps: the timing control circuit comprises a memory 71, a timing controller 72, a data driving circuit 73 and a scanning driving circuit 74, wherein the data driving circuit 73 and the scanning driving circuit 74 are both connected with the timing controller 72, and the memory 71 is connected with the timing controller 72; wherein:
the time sequence controller 72 is configured to obtain a compensation pixel value, and adjust a first pixel value to be displayed of a current frame of a sub-pixel to be compensated to a second pixel value according to the compensation pixel value;
the timing controller 72 is further configured to control the data driving circuit 73 to load a second data driving signal corresponding to a second pixel value to the data line during the compensation time, and control the data driving circuit 73 to load a first data driving signal corresponding to a first pixel value to the data line outside the compensation time; the memory 71 stores the compensation pixel values, and the timing controller reads the compensation pixel values to compensate the data signals when controlling the data driving circuit to correspondingly load the data signals.
In one embodiment, the obtaining the compensated pixel value includes:
obtaining a compensation pixel value according to a front pixel value displayed by a front sub-pixel of the sub-pixel to be compensated and a first pixel value displayed by the sub-pixel to be compensated; the compensation pixel value compensation method specifically comprises the following steps:
when P ═ C, VP,C＝Vmin；
When P is Pmax and C is Cmin, V isP,C＝Vmax；
When P is Pmin and C is Cmax, VP,C＝Vmax；
When C is more than P, Vmin is less than or equal to VP,C≤VP-1,C≤Vmax；Vmin≤VP,C-1≤VP,C≤Vmax；
When C is less than P, Vmax is more than or equal to VP,C≥VP-1,C≥Vmin；Vmax≥VP,C-1≥VP,C≥Vmin；
Where P represents the previous pixel value, C represents the first pixel value, VP,CRepresents a signal compensation value when the pre-pixel value is P and the first pixel value is C, Pmax represents a maximum pre-pixel value, Pmin represents a minimum pre-pixel value, Cmax represents a maximum first pixel value, Cmin represents a minimum first pixel value, Vmax represents a maximum signal compensation value, and Vmin represents a minimum signal compensation value.
In a specific embodiment, adjusting a first pixel value to be displayed of a current frame of sub-pixels to be compensated to a second pixel value according to the compensated pixel value includes: and adding the compensation pixel value and the first pixel value to obtain the second pixel value.
In one embodiment, after the polarity inversion, the timing driver 72 controls the scan driving circuit 74 to drive the current row scan signal to be loaded to the sub-pixel to be compensated, and controls the data driving circuit 73 to load the second data driving signal corresponding to the second pixel value to the current column data line corresponding to the sub-pixel to be compensated during the scanning time of the sub-pixel to be compensated.
In a specific embodiment, the compensation time is equal to the scanning time of the sub-pixel to be compensated in one frame of image display.
In one embodiment, when the current row scan signal stops being loaded to the sub-pixel to be compensated, the timing driver 72 controls the scan driving circuit 74 to drive the next row scan signal to be loaded to the next sub-pixel, and controls the data driving circuit 73 to load the first data driving signal corresponding to the first pixel value to the current column data line corresponding to the sub-pixel to be compensated, where the sub-pixel to be compensated and the next sub-pixel are in the same column.
In one embodiment, the voltage applied to the sub-pixel is reversed in polarity every two scan lines along the data line direction;
in the display of one frame, when the timing driver 72 controls the scan driving circuit 74 to start loading the scan signal onto the 2N-1 th scan line, the timing driver 72 controls the data driving circuit 73 to load the second data driving signal corresponding to the second pixel value onto the data line; when the timing driver 72 controls the scan driving circuit 74 to start loading the scan signal onto the 2 nth scan line, the timing driver 72 controls the data driving circuit 73 to load the first data driving signal corresponding to the first pixel value onto the data line, where N is a positive integer.
The invention also provides a display comprising at least one display unit according to the invention.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (13)
1. A display method is suitable for displaying a pixel matrix, the pixel matrix comprises a plurality of sub-pixels arranged in a matrix, and the polarity of the voltage applied to the sub-pixels is reversed once every two scanning lines along the direction of a data line; wherein the method comprises the following steps:
obtaining a compensation pixel value;
adjusting a first pixel value to be displayed of a current frame of the sub-pixel to be compensated into a second pixel value according to the compensation pixel value;
loading a second data driving signal corresponding to the second pixel value to the data line during the compensation time, and loading a first data driving signal corresponding to the first pixel value to the data line outside the compensation time;
the obtaining compensated pixel values includes:
obtaining a compensation pixel value according to a front pixel value displayed by a front sub-pixel of a sub-pixel to be compensated and a first pixel value displayed by the sub-pixel to be compensated; the compensation pixel value compensation method specifically comprises the following steps:
when P ═ C, VP,C＝Vmin；
When P is Pmax and C is Cmin, V isP,C＝Vmax；
When P is Pmin and C is Cmax, VP,C＝Vmax；
When C is more than P, Vmin is less than or equal to VP,C≤VP-1,C≤Vmax；Vmin≤VP,C-1≤VP,C≤Vmax；
When C is less than P, Vmax is more than or equal to VP,C≥VP-1,C≥Vmin；Vmax≥VP,C-1≥VP,C≥Vmin；
Where P represents the previous pixel value, C represents the first pixel value, VP,CRepresents a signal compensation value V when the previous pixel value is P and the first pixel value is CP-1C represents a signal compensation value when the previous pixel value is P-1 and the first pixel value is C, and VP,C-1Represents a signal compensation value when the pre-pixel value is of a size P and the first pixel value is of a size C-1, Pmax represents a maximum pre-pixel value, Pmin represents a minimum pre-pixel value, Cmax represents a maximum first pixel value, Cmin represents a minimum first pixel value, Vmax represents a maximum signal compensation value, and Vmin represents a minimum signal compensation value.
2. The method according to claim 1, wherein adjusting the first pixel value to be displayed of the current sub-pixel to be compensated to the second pixel value according to the compensated pixel value comprises:
and adding the compensation pixel value and the first pixel value to obtain the second pixel value.
3. The method according to any one of claims 1 or 2, wherein after the polarity inversion, the current row scan signal is driven to be loaded to the sub-pixel to be compensated, and during the sub-pixel scan time to be compensated, the second data driving signal corresponding to the second pixel value is loaded to the current column data line corresponding to the sub-pixel to be compensated.
4. The display method according to claim 3, wherein the compensation time is equal to a scanning time of the sub-pixel to be compensated displayed in one frame of image.
5. The method according to claim 3, wherein when the current line scanning signal stops being loaded to the sub-pixel to be compensated, the next line scanning signal is driven to be loaded to the next sub-pixel, and the first data driving signal corresponding to the first pixel value is loaded to the current column data line corresponding to the sub-pixel to be compensated, wherein the sub-pixel to be compensated and the next sub-pixel are in the same column.
6. The display method according to claim 1, wherein the voltage applied to the sub-pixel is inverted in polarity every two scanning lines in a data line direction;
in the display of one frame of picture, when starting to load the scanning signal to the 2N-1 th scanning line, load the second data driving signal corresponding to the second pixel value to the said data link; when loading a scanning signal to the 2N scanning line is started, a first data driving signal corresponding to a first pixel value is loaded to the data line, wherein N is a positive integer.
7. A display unit is suitable for displaying a pixel matrix, the pixel matrix comprises a plurality of sub-pixels arranged in a matrix, and the polarity of the voltage applied to the sub-pixels is reversed once every two scanning lines along the direction of a data line; the method comprises the following steps: the data driving circuit and the scanning driving circuit are both connected with the time sequence controller, and the memory is connected with the time sequence controller; wherein:
the time sequence controller is used for acquiring a compensation pixel value, and adjusting a first pixel value to be displayed of a current frame of the sub-pixel to be compensated into a second pixel value according to the compensation pixel value;
the time schedule controller is also used for controlling the data driving circuit to load a second data driving signal corresponding to a second pixel value to the data line in the compensation time, and controlling the data driving circuit to load a first data driving signal corresponding to a first pixel value to the data line outside the compensation time; wherein the memory has the compensated pixel values stored therein;
the timing controller acquiring the compensated pixel value includes:
obtaining a compensation pixel value according to a front pixel value displayed by a front sub-pixel of a sub-pixel to be compensated and a first pixel value displayed by the sub-pixel to be compensated; the compensation pixel value compensation method specifically comprises the following steps:
when P ═ C, VP,C＝Vmin；
When P is Pmax and C is Cmin, V isP,C＝Vmax；
When P is Pmin and C is Cmax, VP,C＝Vmax；
When C is more than P, Vmin is less than or equal to VP,C≤VP-1,C≤Vmax；Vmin≤VP,C-1≤VP,C≤Vmax；
When C is less than P, Vmax is more than or equal to VP,C≥VP-1,C≥Vmin；Vmax≥VP,C-1≥VP,CMore than or equal to Vmin; where P represents the previous pixel value, C represents the first pixel value, VP,CRepresents a signal compensation value V when the previous pixel value is P and the first pixel value is CP-1C represents a signal compensation value when the previous pixel value is P-1 and the first pixel value is C, and VP,C-1Represents a signal compensation value when the pre-pixel value is of a size P and the first pixel value is of a size C-1, Pmax represents a maximum pre-pixel value, Pmin represents a minimum pre-pixel value, Cmax represents a maximum first pixel value, Cmin represents a minimum first pixel value, Vmax represents a maximum signal compensation value, and Vmin represents a minimum signal compensation value.
8. The display unit according to claim 7, wherein adjusting the first pixel value to be displayed of the current frame of the sub-pixel to be compensated to the second pixel value according to the compensated pixel value comprises: and adding the compensation pixel value and the first pixel value to obtain the second pixel value.
9. The display unit according to any of claims 7 or 8, wherein after the polarity inversion, the timing controller controls the scan driving circuit to drive a current row scan signal to be applied to the sub-pixel to be compensated, and controls the data driving circuit to apply a second data driving signal corresponding to a second pixel value to a current column data line corresponding to the sub-pixel to be compensated during the scan time of the sub-pixel to be compensated.
10. The display unit according to claim 9, wherein the compensation time is equal to a scanning time of the sub-pixel to be compensated displayed in one frame of image.
11. The display unit of claim 9, wherein when the current row scan signal stops being applied to the sub-pixel to be compensated, the timing controller controls the scan driving circuit to drive the next row scan signal to be applied to the next sub-pixel, and controls the data driving circuit to apply the first data driving signal corresponding to the first pixel value to the current column data line corresponding to the sub-pixel to be compensated, wherein the sub-pixel to be compensated and the next sub-pixel are in the same column.
12. The display unit of claim 11, wherein the voltage applied to the sub-pixel is inverted in polarity every two scan lines along the data line direction;
in the display of one frame of picture, when the time schedule controller controls the scanning drive circuit to start loading the scanning signal to the 2N-1 th scanning line, the time schedule controller controls the data drive circuit to load the second data drive signal corresponding to the second pixel value to the data line; when the time schedule controller controls the scanning driving circuit to start loading the scanning signals to the 2N scanning lines, the time schedule controller controls the data driving circuit to load the first data driving signals corresponding to the first pixel values to the data lines, wherein N is a positive integer.
13. A display comprising at least one display unit according to any one of claims 7-12.
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| CN111554242B (en) * | 2020-05-13 | 2021-03-23 | 深圳市华星光电半导体显示技术有限公司 | Display device and terminal |
| CN111816136B (en) * | 2020-08-09 | 2021-11-12 | 合肥奕斯伟集成电路有限公司 | Liquid crystal display, driving compensation method and driving compensation device thereof |
| CN112102732B (en) * | 2020-09-23 | 2022-06-03 | 合肥维信诺科技有限公司 | Display module, display device and display compensation method of display module |
| CN112511716B (en) * | 2020-11-17 | 2023-06-30 | Oppo广东移动通信有限公司 | Image display method, DDIC chip, AP, display screen module and terminal |
| CN112735349B (en) * | 2020-12-31 | 2022-04-22 | 成都中电熊猫显示科技有限公司 | Liquid crystal display and driving method thereof |
| CN114677981B (en) * | 2022-03-28 | 2023-07-25 | Tcl华星光电技术有限公司 | Charging compensation method and charging compensation device |
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