CN112927660A - Driving circuit, driving method thereof and display panel - Google Patents
Driving circuit, driving method thereof and display panel Download PDFInfo
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- CN112927660A CN112927660A CN202110186256.6A CN202110186256A CN112927660A CN 112927660 A CN112927660 A CN 112927660A CN 202110186256 A CN202110186256 A CN 202110186256A CN 112927660 A CN112927660 A CN 112927660A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3614—Control of polarity reversal in general
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3648—Control of matrices with row and column drivers using an active matrix
- G09G3/3655—Details of drivers for counter electrodes, e.g. common electrodes for pixel capacitors or supplementary storage capacitors
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
Abstract
The invention provides a driving circuit, a driving method thereof and a display panel, and relates to the technical field of display. In the driving circuit, the driving unit is configured to input a first data signal to a first pole of the first switching unit and a second data signal to a second pole of the second switching unit, respectively, at different periods; the first data signal and the second data signal have opposite polarities. The control unit is configured to input a first turn-on voltage to the first control signal line and a second turn-on voltage to the second control signal line at different periods. The absolute value of the difference between the voltage difference of the first starting voltage and the first data signal and the difference between the voltage difference of the second starting voltage and the second data signal is smaller than a preset value. The invention is suitable for manufacturing the driving circuit.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving circuit, a driving method thereof and a display panel.
Background
With the rapid development of display technology, people have higher and higher requirements for the performance of display panels. Under the condition that the polarities of signal voltages of two adjacent rows of data signal lines are opposite, a vertical stripe phenomenon caused by uneven brightness is easy to occur in a picture of the display panel, and the display effect is seriously reduced.
At present, it is desirable to provide a driving circuit to solve the above problems.
Disclosure of Invention
The embodiment of the invention provides a driving circuit, a driving method thereof and a display panel.
In order to achieve the above purpose, the embodiment of the invention adopts the following technical scheme:
in one aspect, a driving circuit is applied to a liquid crystal display panel, where the liquid crystal display panel includes a plurality of first data lines and a plurality of second data lines, and the first data lines and the second data lines are arranged at intervals; the driven circuit includes: the circuit comprises a driving unit, a control unit, a first control signal line, a second control signal line, a plurality of first switch units and a plurality of second switch units.
The control unit is electrically connected with the first control signal line and the second control signal line respectively; the grid electrode of the first switch unit is electrically connected with the first control signal line, the first pole is electrically connected with the driving unit, and the second pole is electrically connected with the first data line; the grid electrode of the second switch unit is electrically connected with the second control signal line, the first pole is electrically connected with the driving unit, and the second pole is electrically connected with the second data line.
Wherein the driving unit is configured to input a first data signal to a first pole of the first switching unit and a second data signal to a second pole of the second switching unit, respectively, at different periods; the first data signal and the second data signal are opposite in polarity. The control unit is configured to input a first turn-on voltage to the first control signal line and a second turn-on voltage to the second control signal line, respectively, at different periods.
The absolute value of the difference between the voltage difference of the first turn-on voltage and the first data signal and the voltage difference of the second turn-on voltage and the second data signal is smaller than a preset value.
Optionally, the first starting voltage is a sum of an initial voltage and a first compensation voltage, and the second starting voltage is a sum of the initial voltage and a second compensation voltage.
The voltage of the first data signal is a first level voltage, and the first compensation voltage a1 is a positive voltage; the voltage of the second data signal is a second level voltage, and the second compensation voltage a2 is a negative voltage; or, the voltage of the first data signal is the second level voltage, and the first compensation voltage a1 is a negative voltage; the voltage of the second data signal is the first level voltage, and the second compensation voltage a2 is a positive voltage; the first level voltage is greater than the second level voltage.
Wherein 0 < | a1| < | m | + | n |, 0 < | a2| < | m | + | n |; m is a voltage value of the first data signal corresponding to the liquid crystal display panel displaying a 255 gray scale picture, and n is a voltage value of the second data signal corresponding to the liquid crystal display panel displaying a 255 gray scale picture.
Alternatively, | a1| ═ a2 |.
Optionally, the initial voltage is 12V, m is 4V, n is-4V, a1 is 2V, and a2 is-2V.
Optionally, the first starting voltage is a sum of an initial voltage and a first compensation voltage, and the second starting voltage is a sum of the initial voltage and a second compensation voltage.
The voltage x1 of the first data signal is a first level voltage, the first compensation voltage a1 is a positive voltage; the voltage x2 of the second data signal is a second level voltage, and the second compensation voltage a2 is a negative voltage; alternatively, the voltage x1 of the first data signal is the second level voltage, and the first compensation voltage a1 is a negative voltage; the voltage x2 of the second data signal is the first level voltage, the second compensation voltage a2 is a positive voltage; the first level voltage is greater than the second level voltage.
Wherein 0 < | a1| < | x1| + | x2|, 0 < | a2| < | x1| + | x2 |.
Alternatively, | a1| ═ a2| (| x1| + | x2 |)/2.
Optionally, the initial voltage is 12V, x1 ═ 4V, x2 ═ -4V, 0V < a1 < 8V, -8V < a2 < 0V.
Optionally, the first control signal line and the second control signal line are arranged in parallel, the first switch unit is arranged in a direction parallel to the first control signal line, and the second switch unit is arranged in a direction parallel to the second control signal line.
In another aspect, a display panel is provided, the non-display region of which includes the driving circuit as described above.
In another aspect, there is provided a driving method of the driving circuit as described above, applied to a liquid crystal display panel, the method including:
in a first time interval, the driving unit respectively inputs a first data signal to a first pole of the first switching unit and a first pole of the second switching unit; the control unit respectively inputs a first turn-on voltage to the first control signal line and a first turn-off voltage to the second control signal line.
In a second period, the driving unit respectively inputs a second data signal to the first pole of the first switching unit and the first pole of the second switching unit; the first data signal and the second data signal are opposite in polarity; the control unit respectively inputs a second turn-on voltage to the second control signal line and a second turn-off voltage to the first control signal line.
Wherein an absolute value of a difference between a voltage difference between the first turn-on voltage and the first data signal and a voltage difference between the second turn-on voltage and the second data signal is less than a preset value.
Embodiments of the present invention provide a driving circuit, a driving method thereof, and a display panel, in which since an absolute value of a difference between a voltage difference of a first turn-on voltage and a first data signal and a voltage difference of a second turn-on voltage and a second data signal in the driving circuit is less than a preset value, so that an absolute value of a difference between a voltage difference between the gate electrode and the first pole of the first switching unit and a voltage difference between the gate electrode and the first pole of the second switching unit is less than a preset value, thus, the current value of the second pole output of the first switch unit and the current value of the second pole output of the second switch unit tend to be the same, therefore, the current value flowing into the first data line and the current value flowing into the second data line tend to be the same, the charging rate difference of the pixel units in the adjacent columns in the liquid crystal display panel is reduced, thereby improving the uniformity of the brightness of the picture in the display panel and improving the vertical stripe phenomenon and the display effect.
Drawings
In order to more clearly illustrate the embodiments of the present invention or technical solutions in related arts, the drawings used in the description of the embodiments or related arts will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a schematic diagram illustrating a vertical stripe phenomenon of a display screen of an LCD panel according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a driving circuit according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of another driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic circuit diagram of an lcd panel according to an embodiment of the present invention;
FIG. 5 is a graph illustrating transfer characteristics of a TFT according to an embodiment of the present invention;
fig. 6 is a graph of transfer characteristics of another tft according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the embodiments of the present invention, "a plurality" means two or more unless explicitly specified or limited otherwise; "multiple" means two or more than two; the term "coupled" is to be construed broadly, e.g., as meaning directly coupled or indirectly coupled through intervening media. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
For the convenience of clearly describing the technical solutions of the embodiments of the present invention, in the embodiments of the present invention, the words "first", "second", and the like are used to distinguish the same items or similar items with basically the same functions and actions, and those skilled in the art can understand that the words "first", "second", and the like do not limit the quantity.
In the related art driving circuit for a liquid crystal display panel, in order to prevent the liquid crystal from being polarized due to being in a unipolar direction for a long time, the polarities of signals input to the source electrodes of the thin film transistors in two adjacent columns are opposite and are inverted every picture frame; at this time, the difference between the gate-source voltages of two adjacent rows of tfts is large, which results in a large difference between the currents output from the tfts in the adjacent rows to the data line, and thus the difference between the charging rates of the pixel units in the adjacent rows is large, which further results in uneven brightness of the pixels in two adjacent rows of the lcd panel, and a vertical stripe phenomenon (vertical stripe Mura) shown in a dotted line in fig. 1 is generated, which is especially serious for display products with low charging rates.
Based on this, the embodiment of the present invention provides a driving circuit, which is applied to a liquid crystal display panel (LCD), and as shown in fig. 2, the liquid crystal display panel includes a plurality of first data lines 5 and a plurality of second data lines 6, where the first data lines 5 and the second data lines 6 are disposed at intervals; the driven circuit includes: the driving unit 1, the control unit 2, the first control signal line 3, the second control signal line 4, the plurality of first switching units 8, and the plurality of second switching units 7. The control unit 2 is electrically connected with a first control signal line 3 and a second control signal line 4 respectively; a Gate (Gate) of the first switching unit 8 is electrically connected to the first control signal line 3, a first pole is electrically connected to the driving unit 1, and a second pole is electrically connected to the first data line 5; the gate of the second switching unit 7 is electrically connected to the second control signal line 4, the first pole is electrically connected to the driving unit 1, and the second pole is electrically connected to the second data line 6.
Wherein the driving unit is configured to input the first data signal to a first pole of the first switching unit and the second data signal to a second pole of the second switching unit, respectively, at different periods; the first data signal and the second data signal have opposite polarities. The control unit is configured to input a first turn-on voltage to the first control signal line and a second turn-on voltage to the second control signal line, respectively, at different periods. The absolute value of the difference between the voltage difference of the first starting voltage and the first data signal and the difference between the voltage difference of the second starting voltage and the second data signal is smaller than a preset value.
The first data signal and the second data signal have opposite polarities: taking the value of a reference signal as a reference, wherein the value of the first data signal is greater than that of the reference signal, and the value of the second data signal is less than that of the reference signal; or the value of the first data signal is smaller than that of the reference signal, and the value of the second data signal is larger than that of the reference signal. The value of the reference signal can be determined according to actual conditions. When the polarities of the adjacent first data signal and the second data signal are opposite, the driving circuit may be a column inversion driving circuit, or may be a Z inversion driving circuit, which may be determined according to actual situations.
If the value of the first data signal is greater than the value of the reference signal, the first data signal is referred to as a positive polarity signal; if the value of the first data signal is smaller than that of the reference signal, the first data signal is called a negative polarity signal.
The first switch unit and the second switch unit are both transistors, and the types of the transistors are the same. For example, the first switching unit and the second switching unit may be Thin Film Transistors (TFTs) at the same time.
The preset value is not limited, and the value of the preset value can be different for different types of display products. For example, if the first turn-on voltage of the display product is 14V, the second turn-on voltage is 10V, the voltage of the first data signal is 4V, and the voltage of the second data signal is-4V, the preset value may be 8V.
In practical applications, in a first period, the driving unit is configured to input a first data signal to a first pole of the first switching unit and a first pole of the second switching unit, respectively, and the control unit inputs a first turn-on voltage to the first control signal line and a first turn-off voltage to the second control signal line, respectively. The first starting voltage controls the first switch unit to be started, so that the first pole of the first switch unit receives the first data signal; the first turn-off voltage controls the second switching unit to turn off, so that the first pole of the second switching unit cannot receive the first data signal.
In a second period, the driving unit is configured to input a second data signal to the first pole of the first switching unit and the first pole of the second switching unit respectively, and the polarities of the first data signal and the second data signal are opposite; the control unit respectively inputs a second turn-on voltage to the second control signal line and a second turn-off voltage to the first control signal line. The second starting voltage controls the second switch unit to be started, so that the first pole of the second switch unit receives the second data signal; the second turn-off voltage controls the first switching unit to turn off, so that the first pole of the first switching unit cannot receive the second data signal. Namely, the driving circuit realizes the time-sharing output of the first switch unit and the second switch unit by the control action of the first control signal line on the first switch unit and the control action of the second control signal line on the second switch unit.
The first period and the second period may be periods corresponding to two frames of the liquid crystal display panel when displaying the same screen.
The first and second turn-on voltages may be a high level Voltage (VGH), and the first and second turn-off voltages may be a low level Voltage (VGL), and specific voltage values thereof may be determined according to actual conditions.
The specific structure of the driving unit is not limited herein. Illustratively, the driving unit may be a driving IC.
The specific structure of the control unit is not limited herein. Illustratively, the control unit may be a control circuit.
Embodiments of the present invention provide a driving circuit, a driving method thereof, and a display panel, in which since an absolute value of a difference between a voltage difference of a first turn-on voltage and a first data signal and a voltage difference of a second turn-on voltage and a second data signal in the driving circuit is less than a preset value, so that an absolute value of a difference between a voltage difference between the gate electrode and the first pole of the first switching unit and a voltage difference between the gate electrode and the first pole of the second switching unit is less than a preset value, thus, the current value of the second pole output of the first switch unit and the current value of the second pole output of the second switch unit tend to be the same, therefore, the current value flowing into the first data line and the current value flowing into the second data line tend to be the same, the charging rate difference of the pixel units in the adjacent columns in the liquid crystal display panel is reduced, thereby improving the uniformity of the brightness of the picture in the display panel and improving the vertical stripe phenomenon and the display effect.
Optionally, the first turn-on voltage is a sum of the initial voltage and the first compensation voltage, and the second turn-on voltage is a sum of the initial voltage and the second compensation voltage. The voltage of the first data signal is a first level voltage, and the first compensation voltage a1 is a positive voltage; the voltage of the second data signal is a second level voltage, and the second compensation voltage a2 is a negative voltage; or, the voltage of the first data signal is the second level voltage, and the first compensation voltage a1 is a negative voltage; the voltage of the second data signal is a first level voltage, and the second compensation voltage a2 is a positive voltage; the first level voltage is greater than the second level voltage.
Wherein 0 < | a1| < | m | + | n |, 0 < | a2| < | m | + | n |; m is a voltage value of a first data signal corresponding to the liquid crystal display panel displaying a 255 gray scale picture, and n is a voltage value of a second data signal corresponding to the liquid crystal display panel displaying the 255 gray scale picture.
The first level voltage is greater than the second level voltage, and the first level voltage may be referred to as a high level voltage and the second level voltage may be referred to as a low level voltage.
If the voltage of the first data signal is a high level voltage, the voltage of the second data signal is a low level voltage; in order to make the absolute value of the difference between the voltage difference between the first turn-on voltage and the first data signal and the difference between the voltage difference between the second turn-on voltage and the second data signal smaller than the preset value, the first compensation voltage corresponding to the first turn-on voltage is positively compensated, and the second compensation voltage corresponding to the second turn-on voltage is negatively compensated, for example: when the initial voltage is 12V, the constant m is 4V and the constant n is-4V when the LCD panel displays 255 gray-scale images, the first compensation voltage a1 is in the range of 0V < a1 < 8V, the second compensation voltage a2 is in the range of-8V < a2 < 0V, and the first compensation voltage a1 can be 1V, 2V, 3V or 4V; the second compensation voltage a2 may be-1V, -2V, -3V, or-4V.
If the voltage of the first data signal is a low level voltage, the voltage of the second data signal is a high level voltage; in order to make the absolute value of the difference between the voltage difference between the first turn-on voltage and the first data signal and the difference between the voltage difference between the second turn-on voltage and the second data signal smaller than the preset value, the first compensation voltage corresponding to the first turn-on voltage is negatively compensated, and the second compensation voltage corresponding to the second turn-on voltage is positively compensated, for example: the initial voltage is 12V, when the liquid crystal display panel displays 255 gray-scale images, the constant m is-4V, the constant n is 4V, the range of the first compensation voltage a1 is-8V < a1 < 0V, and the range of the second compensation voltage a2 is 0V < a2 < 8V; for example, the second compensation voltage a2 may be 1V, 2V, 3V, or 4V; the first compensation voltage a1 may be-1V, -2V, -3V, or-4V.
It should be noted that, when the driving circuit drives the lcd panel to display a screen, no matter how the voltage of the first data signal and the voltage of the second data signal vary with the gray scale corresponding to the display screen, the first compensation voltage a1 and the second compensation voltage a2 always satisfy the above formula 0 < | a1| < | m | + | n |, 0 < | a2| < | m | + | n |, and m and n are constants.
The embodiment of the invention can make the absolute value of the difference between the voltage difference of the first switching voltage and the first data signal and the voltage difference of the second switching voltage and the second data signal less than the preset value, and make the absolute value of the difference between the voltage difference of the first switching unit and the first pole and the voltage difference of the second switching unit and the first pole less than the preset value, so that the current value output by the second pole of the first switching unit and the current value output by the second pole of the second switching unit tend to be the same, and the current value flowing into the first data line and the current value flowing into the second data line also tend to be the same, thereby reducing the charging rate difference of adjacent column pixel units in the liquid crystal display panel, thereby improving the uniformity of the brightness of the picture in the display panel and improving the vertical stripe phenomenon and the display effect.
Alternatively, | a1| ═ a2 |.
In practical application, by setting the absolute values of the first compensation voltage and the second compensation voltage to be equal, namely, by performing equal-amplitude compensation, the absolute value of the difference between the voltage difference between the first starting voltage and the first data signal and the difference between the voltage difference between the second starting voltage and the second data signal can be smaller than a preset value, and meanwhile, the power consumption of the liquid crystal display panel can not be increased, and the cost is reduced.
Alternatively, in practical applications, the initial voltage may be 12V, m-4V, n-4V, a 1-2V, and a 2-2V.
The reason why the driving circuit provided by the embodiment of the present invention can improve the luminance uniformity of the screen in the display panel will be described below by taking the first compensation voltage a1 ═ 2V and the second compensation voltage a2 ═ 2V as examples and comparing them with the driving circuit in the related art. The thin film transistor transfer characteristic curves shown in fig. 5 and 6 are characteristic transfer curves obtained by testing before and after the reliability test, respectively; the abscissa of fig. 5 and 6 is the gate-source voltage (Vgs) of the thin film transistor, and the ordinate is the output current value (Id) of the thin film transistor or the switching cell.
TABLE 1
| Vgs | Id (before RA)/uA | Id (after RA)/uA |
| 8V | 87.38 | 19.17 |
| 16V | 483.52 | 268.07 |
Table 1 is a table of current (Id) values output from the drains of the tfts in two adjacent columns in the related art.
In the related art driving circuit, the polarities of signals input to the source electrodes of two adjacent rows of thin film transistors are opposite, and the voltage values of the signals are +4V and-4V, respectively, the voltage values input to the gate electrodes of the two adjacent rows of thin film transistors are both 12V, and the gate-source voltages (Vgs) of the two adjacent rows of thin film transistors are respectively as follows: vgs 12V-4V 8V, Vgs' 12V- (-4V) 16V. As can be seen from the characteristic transfer curve of the thin film transistor shown in fig. 5 and the data in table 1, when Vgs is 8V before the reliability test (RA test), the current value output from the drain of the corresponding thin film transistor is 87.38 uA; when Vgs' is 16V, the current value output by the drain electrode of the corresponding thin film transistor is 483.52 uA; the current value output by the drain electrodes of the thin film transistors in two adjacent columns is different by 5.5 times. After the reliability test (RA test), when Vgs is 8V, the current value of the drain output of the corresponding thin film transistor is 19.17 uA; when Vgs' is 16V, the current value output by the drain electrode of the corresponding thin film transistor is 268.07 uA; the current value of the drain output of the two adjacent columns of thin film transistors is different by 14 times. As the difference of the current values output by the drains of the two adjacent rows of thin film transistors is very large, the difference of the charging rates of the pixel units on the two adjacent rows of signal lines electrically connected with the drains of the two adjacent rows of thin film transistors is very large, and further, the brightness of the pixels of the two adjacent rows of the liquid crystal display panel is not uniform, and a vertical stripe phenomenon (vertical stripe Mura) as shown in fig. 1 is generated. Generally, in order to improve the problem, a measure adopted in the related art is to substantially phase up the gate input voltage of the two adjacent rows of the thin film transistors, that is, to substantially phase up the gate turn-on voltage of the thin film transistors, so as to pull up the drain output current of the thin film transistors, however, while increasing the power consumption, the characteristic transfer curve of the thin film transistors is easily red-shifted after the reliability test rather than before the reliability test, that is, the characteristic transfer curve is shifted to the right seriously (forward bias) after the reliability test, and thus the product requirement is not met.
TABLE 2
| Vgs | Id (before RA)/uA | Id (after RA)/uA | |
| First of allSwitch unit | 10V | 153.14 | 49.98 |
| Second switch unit | 14V | 350.95 | 172.43 |
Table 2 is a list of the current output from the second pole of the first switching unit and the current output from the second pole of the second switching unit when the first compensation voltage a1 is 2V and the second compensation voltage a2 is-2V according to the embodiment of the present invention.
Embodiments of the present invention provide an initial voltage of 12V, m-4V, n-4V, a first compensation voltage a 1-2V, a second compensation voltage a 2-2V, and a1 and a2 that satisfy the following equations: 0 < | a1| < (| m | + | n |); 0 < | a2| < (| m | + | n |). Referring to fig. 3, the first turn-on voltage input by the control unit 2 to the first control signal line 3 is: 12V +2V ═ 14V; the second turn-on voltage input by the control unit 2 to the second control signal line 4 is: 12V-2V ═ 10V; the first starting voltage is the sum of the initial voltage and the first compensation voltage, and the second starting voltage is the sum of the initial voltage and the second compensation voltage; in the liquid crystal display panel with a 255-gray scale screen, the voltage input by the driving unit 1 to the first pole of the first switching unit 8 is 4V, the voltage input by the driving unit 1 to the first pole of the second switching unit 7 is-4V, and then the gate-source voltage Vgs1 of the first switching unit and the gate-source voltage Vgs2 of the second switching unit are respectively: vgs1 is the first turn-on voltage-the voltage of the first pole of the first switching unit is 14V-4V-10V, Vgs2 is the second turn-on voltage-the voltage of the first pole of the second switching unit is 10V- (-4V) 14V, and the difference between Vgs1 and Vgs2 becomes small. As can be seen from the characteristic transition curves of the first switching cell and the second switching cell shown in fig. 6 and the data in table 2, when Vgs1 is 10V before the reliability test (RA test), the current value of the second pole output of the corresponding first switching cell is 153.14 uA; when Vgs2 is 14V, the current value of the second pole output of the corresponding second switch unit is 350.95 uA; the difference of the current values output by the drain electrodes of the two adjacent columns of thin film transistors is reduced from 5.5 times to 2.3 times in the related art, and the difference becomes small. After the reliability test (RA test), when Vgs1 is 10V, the current value of the second pole output of the corresponding first switching unit is 49.98 uA; when Vgs2 is 14V, the current value of the second pole output of the corresponding second switch unit is 172.43 uA; the difference in the current values output by the first switching unit and the first switching unit is reduced from 14 times to 3.45 times in the related art, and the difference in the output current value of the thin film transistor after the reliability test is smaller.
Obviously, in the case that the first compensation voltage a1 is 2V and the second compensation voltage a2 is-2V, the difference between the gate-source voltages output by the first switch unit and the first switch unit is greatly reduced, and the current values output by the first switch unit and the first switch unit tend to be the same, so that the current value flowing into the first data line 5 and the current value flowing into the second data line 6 in the display area of the liquid crystal display panel shown in fig. 4 tend to be the same, the charging rates of the pixel units 10 in two adjacent columns tend to be the same, the uniformity of the display brightness of the pixel units 10 in the display panel is improved, the vertical stripe phenomenon is further improved, and the display effect is improved.
TABLE 3
| Vgs | Id (before RA)/uA | Id (after RA)/uA | |
| First switch unit | 12V | 240.65 | 100.27 |
| Second switch unit | 12V | 240.65 | 100.27 |
Table 3 is a list of the current output from the second pole of the first switching unit and the current output from the second pole of the second switching unit when the first compensation voltage a1 is equal to 4V and the second compensation voltage a2 is equal to-4V according to the embodiment of the present invention.
Embodiments of the invention may also provide the following examples: the initial voltage is 12V, m is 4V, n is-4V, the first compensation voltage a1 is 4V, the second compensation voltage a2 is-4V, and the values of a1 and a2 satisfy the following equations: 0 < | a1| < (| m | + | n |); 0 < | a2| < (| m | + | n |). At this time, the first turn-on voltage is: 12V +4V ═ 16V, the second turn-on voltage is: 12V-4V ═ 8V; when Vgs1 is 16V-4V 12V, Vgs2 is 8V- (-4V) 12V, and Vgs1 is Vgs2, and the characteristic transfer curves of the first switch unit and the second switch unit shown in fig. 6 and the data in table 3 are combined, it can be seen that the current values output by the first switch unit and the second switch unit are the same before the reliability test (RA test) and after the reliability test (RA test), that is, when the liquid crystal display panel displays a 255 gray scale picture, the first compensation voltage a1 is 4V, and the second compensation voltage a2 is-4V, which is the optimal compensation voltage at the gray scale. In practice, for convenience of control, the compensation voltages of the lcd panel may be the same when displaying different gray-scale pictures, and in order to achieve the compensation effect of different gray-scale pictures, the voltage values such as the first compensation voltage a1 being 2V and the second compensation voltage a2 being-2V may be selected to compensate all gray-scale pictures. Of course, the compensation voltage value can also be adjusted by combining the severity of the vertical stripe phenomenon of different gray scales, and the compensation voltage value can be determined according to the actual situation.
The reliability test is a test of performing a high temperature operation of more than 60 ℃ on the liquid crystal display panel. The first switch unit and the second switch unit are both thin film transistors.
Optionally, the first start-up voltage is a sum of an initial voltage and a first compensation voltage, and the second start-up voltage is a sum of the initial voltage and a second compensation voltage; the voltage x1 of the first data signal is a first level voltage, and the first compensation voltage a1 is a positive voltage; the voltage x2 of the second data signal is a second level voltage, and the second compensation voltage a2 is a negative voltage; or, the voltage x1 of the first data signal is a second level voltage, and the first compensation voltage a1 is a negative voltage; the voltage x2 of the second data signal is a first level voltage, and the second compensation voltage a2 is a positive voltage; the first level voltage is greater than the second level voltage. Wherein 0 < | a1| < | x1| + | x2|, 0 < | a2| < | x1| + | x2 |.
The specific values of the voltage x1 of the first data signal and the voltage x2 of the second data signal vary with the gray scale of the display screen of the liquid crystal display panel. The first compensation voltage a1 and the second compensation voltage a2 are determined according to specific values of the voltage x1 of the first data signal and the voltage x2 of the second data signal in a frame of the current gray level. The compensation voltage value can be adjusted by combining the severity of the vertical stripe phenomenon of different gray scales in practical application, and can be specifically determined according to practical conditions.
Alternatively, in practical applications, the initial voltage may be 12V, x1 is 4V, and x2 is-4V, so that the first compensation voltage a1 has a value range of 0V < a1 < 8V, and the second compensation voltage a2 has a value range of-8V < a2 < 0V.
Optionally, in practical applications, in order to reduce power consumption, the compensation amplitudes of the first compensation voltage a1 and the second compensation voltage a2 are the same, that is, | a1| ═ a2 |; and | a1| ═ a2| (| x1| + | x2 |)/2.
If the initial voltage is 12V, x1 is 4V, and x2 is-4V, then the first compensation voltage a1 is a positive voltage, and the second compensation voltage a2 is a negative voltage; | a1| ═ a2| (| x1| + | x2|)/2 ═ 4V, i.e., a1 ═ 4V, a2 ═ 4V; as can be seen from the transfer characteristic curve of the thin film transistor shown in fig. 6, the gate-source voltage Vgs1 of the first switch unit is the same as the gate-source voltage Vgs1 of the first switch unit, and the voltage x1 of the first data signal is (12+4) -4-12V, the gate-source voltage Vgs2 of the second switch unit is the initial voltage + the second compensation voltage a 2-the voltage x2 of the second data signal is (12-4) - (-4) -12V, and the gate-source voltage of the first switch unit is the same as the gate-source voltage of the second switch unit. The absolute values of the first compensation voltage and the second compensation voltage are equal, so that the display effect is improved, the power consumption of the liquid crystal display panel is not increased, and the cost is reduced.
Alternatively, referring to fig. 2, the first control signal line 3 and the second control signal line 4 are arranged in parallel, the first switch unit 8 is arranged in a direction parallel to the first control signal line 3, and the second switch unit 7 is arranged in a direction parallel to the second control signal line 4. The arrangement mode can reduce the occupied space of the driving circuit, and further facilitates the application of the driving circuit in liquid crystal display panels of different types.
Alternatively, referring to fig. 3, the first poles of the adjacent first switch unit 8 and second switch unit 7 are connected through a node a, and the node a is further electrically connected to the driving unit 1, that is, the driving circuit shown in fig. 3 is a demultiplexer (Demux) 1: 2, or the driving circuit shown in fig. 3 is a demultiplexer (Demux)1 to 2 column inversion driving scheme.
Embodiments of the present invention also provide a display panel, and a non-display area of the display panel includes the driving circuit as described above. Of course, the display panel may further include a plurality of gate lines 9 as shown in fig. 4 and other structures, only the structures related to the invention point are described here, and the other structures of the liquid crystal display panel may be obtained according to the related art or the common general knowledge, and are not described here again.
The display panel is a liquid crystal display panel, and the liquid crystal display panel may be a TN (Twisted Nematic) type, a VA (Vertical Alignment) type, an IPS (In-Plane Switching) type, an ADS (Advanced Super Dimension Switching) type, or the like.
The liquid crystal display panel provided by the embodiment of the invention has good display effect and high product quality.
An embodiment of the present invention further provides a driving method of the above driving circuit, which is applied to a liquid crystal display panel, and the method includes:
s01, in the first time period, the driving unit respectively inputs the first data signal to the first pole of the first switch unit and the first pole of the second switch unit; the control unit respectively inputs a first turn-on voltage to the first control signal line and a first turn-off voltage to the second control signal line.
The first switch unit is controlled to be switched on by the first switching-on voltage, so that a first pole of the first switch unit receives a first data signal; the first turn-off voltage controls the second switching unit to turn off, so that the first pole of the second switching unit cannot receive the first data signal.
S02, in the second time interval, the driving unit respectively inputs the second data signal to the first pole of the first switch unit and the first pole of the second switch unit; the first data signal and the second data signal have opposite polarities; the control unit respectively inputs a second turn-on voltage to the second control signal line and a second turn-off voltage to the first control signal line. The absolute value of the difference between the voltage difference of the first starting voltage and the first data signal and the difference between the voltage difference of the second starting voltage and the second data signal is smaller than a preset value.
The second starting voltage controls the second switch unit to be started, so that the first pole of the second switch unit receives the second data signal; the second turn-off voltage controls the first switching unit to turn off, so that the first pole of the first switching unit cannot receive the second data signal. Namely, the driving circuit realizes the time-sharing output of the first switch unit and the second switch unit by the control action of the first control signal line on the first switch unit and the control action of the second control signal line on the second switch unit.
The embodiment of the invention provides a driving method of a driving circuit, and an absolute value of a difference value between a voltage difference between a first starting voltage and a first data signal and a voltage difference between a second starting voltage and a second data signal is smaller than a preset value, so that the absolute value of the difference value between a voltage difference between a gate electrode and a first pole of a first switch unit and a voltage difference between the gate electrode and the first pole of a second switch unit is smaller than the preset value, and thus, a current value output by a second pole of the first switch unit and a current value output by a second pole of the second switch unit tend to be the same, a current value flowing into the first data line and a current value flowing into the second data line also tend to be the same, a charging rate difference of adjacent columns of pixel units in a liquid crystal display panel is reduced, uniformity of picture brightness in the display panel is further improved, and a vertical stripe phenomenon and a display effect are improved.
The above description is only for the specific embodiments of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art can easily conceive of the changes or substitutions within the technical scope of the present invention, and all the changes or substitutions should be covered within the scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the appended claims.
Claims (10)
1. The driving circuit is applied to a liquid crystal display panel, the liquid crystal display panel comprises a plurality of first data lines and a plurality of second data lines, and the first data lines and the second data lines are arranged at intervals; the driven circuit includes: the device comprises a driving unit, a control unit, a first control signal line, a second control signal line, a plurality of first switch units and a plurality of second switch units;
the control unit is electrically connected with the first control signal line and the second control signal line respectively; the grid electrode of the first switch unit is electrically connected with the first control signal line, the first pole is electrically connected with the driving unit, and the second pole is electrically connected with the first data line; the grid electrode of the second switch unit is electrically connected with the second control signal line, the first pole is electrically connected with the driving unit, and the second pole is electrically connected with the second data line;
wherein the driving unit is configured to input a first data signal to a first pole of the first switching unit and a second data signal to a second pole of the second switching unit, respectively, at different periods; the polarity of the first data signal and the polarity of the second data signal are opposite;
the control unit is configured to input a first turn-on voltage to the first control signal line and a second turn-on voltage to the second control signal line, respectively, at different periods;
the absolute value of the difference between the voltage difference of the first turn-on voltage and the first data signal and the voltage difference of the second turn-on voltage and the second data signal is smaller than a preset value.
2. The driving circuit according to claim 1, wherein the first turn-on voltage is a sum of an initial voltage and a first compensation voltage, and the second turn-on voltage is a sum of the initial voltage and a second compensation voltage;
the voltage of the first data signal is a first level voltage, and the first compensation voltage a1 is a positive voltage; the voltage of the second data signal is a second level voltage, and the second compensation voltage a2 is a negative voltage; or, the voltage of the first data signal is the second level voltage, and the first compensation voltage a1 is a negative voltage; the voltage of the second data signal is the first level voltage, and the second compensation voltage a2 is a positive voltage; the first level voltage is greater than the second level voltage;
wherein 0 < | a1| < | m | + | n |, 0 < | a2| < | m | + | n |; m is a voltage value of the first data signal corresponding to the liquid crystal display panel displaying a 255 gray scale picture, and n is a voltage value of the second data signal corresponding to the liquid crystal display panel displaying a 255 gray scale picture.
3. The driving circuit according to claim 2, wherein | a1| ═ a2 |.
4. The driving circuit according to claim 3, wherein the initial voltage is 12V, m-4V, n-4V, a 1-2V, and a 2-2V.
5. The driving circuit according to claim 1, wherein the first turn-on voltage is a sum of an initial voltage and a first compensation voltage, and the second turn-on voltage is a sum of the initial voltage and a second compensation voltage;
the voltage x1 of the first data signal is a first level voltage, the first compensation voltage a1 is a positive voltage; the voltage x2 of the second data signal is a second level voltage, and the second compensation voltage a2 is a negative voltage; alternatively, the voltage x1 of the first data signal is the second level voltage, and the first compensation voltage a1 is a negative voltage; the voltage x2 of the second data signal is the first level voltage, the second compensation voltage a2 is a positive voltage; the first level voltage is greater than the second level voltage;
wherein 0 < | a1| < | x1| + | x2|, 0 < | a2| < | x1| + | x2 |.
6. The driving circuit according to claim 5, wherein | a1| ═ a2| (| x1| + | x2 |)/2.
7. The driving circuit according to claim 5, wherein the initial voltage is 12V, 4V for x1, 4V for x2, -4V, 0V < a1 < 8V, -8V < a2 < 0V.
8. The drive circuit according to claim 1, wherein the first control signal line and the second control signal line are arranged in parallel, the first switching unit is arranged in a direction parallel to the first control signal line, and the second switching unit is arranged in a direction parallel to the second control signal line.
9. A display panel characterized in that a non-display area of the display panel comprises the driving circuit according to any one of claims 1 to 8.
10. A driving method of a driving circuit according to any one of claims 1 to 8, applied to a liquid crystal display panel, the method comprising:
in a first time interval, the driving unit respectively inputs a first data signal to a first pole of the first switching unit and a first pole of the second switching unit; the control unit respectively inputs a first opening voltage to the first control signal line and inputs a first closing voltage to the second control signal line;
in a second period, the driving unit respectively inputs a second data signal to the first pole of the first switching unit and the first pole of the second switching unit; the first data signal and the second data signal are opposite in polarity; the control unit respectively inputs a second turn-on voltage to the second control signal line and inputs a second turn-off voltage to the first control signal line;
wherein an absolute value of a difference between a voltage difference between the first turn-on voltage and the first data signal and a voltage difference between the second turn-on voltage and the second data signal is less than a preset value.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114582300A (en) * | 2022-04-21 | 2022-06-03 | 福州京东方光电科技有限公司 | Array substrate, display panel and display device |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469337A (en) * | 2002-06-24 | 2004-01-21 | 三菱电机株式会社 | Electric current supply circuit and display device with the same circuit |
| CN1728222A (en) * | 2004-06-30 | 2006-02-01 | 三星Sdi株式会社 | Demultiplexer, display using the same, and display panel |
| CN101408689A (en) * | 2008-11-19 | 2009-04-15 | 友达光电股份有限公司 | Data wire drive method |
| CN104732944A (en) * | 2015-04-09 | 2015-06-24 | 京东方科技集团股份有限公司 | Source drive circuit, source drive method and display device |
| CN105489154A (en) * | 2015-12-31 | 2016-04-13 | 上海天马微电子有限公司 | Display device and drive method |
| US20170003804A1 (en) * | 2015-07-02 | 2017-01-05 | Innolux Corporation | Touch display panel and driving method thereof |
| US20180130435A1 (en) * | 2016-11-02 | 2018-05-10 | Samsung Display Co., Ltd. | Gate driving circuit and display apparatus including the same |
| CN108182915A (en) * | 2017-12-28 | 2018-06-19 | 深圳市华星光电技术有限公司 | Multiplexing display driver circuit |
| CN109712556A (en) * | 2019-03-11 | 2019-05-03 | 京东方科技集团股份有限公司 | Display drive control circuit and control method |
| CN110930938A (en) * | 2019-12-23 | 2020-03-27 | 厦门天马微电子有限公司 | Display panel and display device |
-
2021
- 2021-02-09 CN CN202110186256.6A patent/CN112927660B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1469337A (en) * | 2002-06-24 | 2004-01-21 | 三菱电机株式会社 | Electric current supply circuit and display device with the same circuit |
| CN1728222A (en) * | 2004-06-30 | 2006-02-01 | 三星Sdi株式会社 | Demultiplexer, display using the same, and display panel |
| CN101408689A (en) * | 2008-11-19 | 2009-04-15 | 友达光电股份有限公司 | Data wire drive method |
| CN104732944A (en) * | 2015-04-09 | 2015-06-24 | 京东方科技集团股份有限公司 | Source drive circuit, source drive method and display device |
| US20170003804A1 (en) * | 2015-07-02 | 2017-01-05 | Innolux Corporation | Touch display panel and driving method thereof |
| CN105489154A (en) * | 2015-12-31 | 2016-04-13 | 上海天马微电子有限公司 | Display device and drive method |
| US20180130435A1 (en) * | 2016-11-02 | 2018-05-10 | Samsung Display Co., Ltd. | Gate driving circuit and display apparatus including the same |
| CN108182915A (en) * | 2017-12-28 | 2018-06-19 | 深圳市华星光电技术有限公司 | Multiplexing display driver circuit |
| CN109712556A (en) * | 2019-03-11 | 2019-05-03 | 京东方科技集团股份有限公司 | Display drive control circuit and control method |
| CN110930938A (en) * | 2019-12-23 | 2020-03-27 | 厦门天马微电子有限公司 | Display panel and display device |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114582300A (en) * | 2022-04-21 | 2022-06-03 | 福州京东方光电科技有限公司 | Array substrate, display panel and display device |
| CN114582300B (en) * | 2022-04-21 | 2023-08-15 | 福州京东方光电科技有限公司 | Array substrate, display panel and display device |
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