CN112951174A - Pixel driving circuit, display device and driving method of pixel driving circuit - Google Patents
Pixel driving circuit, display device and driving method of pixel driving circuit Download PDFInfo
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- CN112951174A CN112951174A CN202110345616.2A CN202110345616A CN112951174A CN 112951174 A CN112951174 A CN 112951174A CN 202110345616 A CN202110345616 A CN 202110345616A CN 112951174 A CN112951174 A CN 112951174A
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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
- G09G3/3607—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 for displaying colours or for displaying grey scales with a specific pixel layout, e.g. using sub-pixels
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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
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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Abstract
The invention provides a pixel driving circuit, a display device and a driving method of the pixel driving circuit, wherein the pixel driving circuit comprises a plurality of pairs of scanning lines and a plurality of pixel units, the plurality of pairs of scanning lines are arranged along the row direction, and the plurality of pixel units are arranged between each pair of scanning lines and are arranged in a matrix; wherein, the colors of the pixel units along the direction of the matrix column are the same; the pixel units along the row direction of the matrix comprise first color pixel units, second color pixel units and third color pixel units; the first scanning line in each pair of scanning lines is correspondingly connected with the first color pixel unit, and the second scanning line in each pair of scanning lines is correspondingly connected with the second color pixel unit. The first color pixel units with higher distinguishing capability of human eyes share the first scanning line, and the second color pixel units with higher distinguishing capability of human eyes share the second scanning line, so that the corresponding display brightness of the pixels is consistent, and vertical bright and dark stripes are eliminated.
Description
Technical Field
The present invention relates to the field of display control, and in particular, to a pixel driving circuit, a display device, and a driving method of the pixel driving circuit.
Background
Existing pixel Driving circuits increasingly adopt a DRD (Double Row Driving) design. When the pixel driving circuit designed by the DRD is adopted, due to the fact that the internal circuit has impedance, certain inversion time is needed for data signal inversion, the charging rate of pixels charged in the inversion time is insufficient, and therefore vertical bright and dark stripes appear on a screen.
Disclosure of Invention
The invention mainly aims to provide a pixel driving circuit, a display device and a driving method of the pixel driving circuit, and aims to solve the problem that vertical bright and dark stripes appear in the pixel driving circuit in the prior art.
In order to achieve the above object, the present invention provides a pixel driving circuit, which includes a plurality of pairs of scan lines arranged along a row direction and a plurality of pixel units arranged in a matrix between each pair of scan lines;
wherein, the colors of the pixel units along the direction of the matrix column are the same; the pixel units along the row direction of the matrix comprise first color pixel units, second color pixel units and third color pixel units; each pair of scanning lines comprises a first scanning line and a second scanning line; the first scanning line in each pair of scanning lines is correspondingly connected with the first color pixel unit, and the second scanning line in each pair of scanning lines is correspondingly connected with the second color pixel unit.
Optionally, the first color pixel unit is a red pixel unit; the second color pixel unit is a green pixel unit; the third color pixel unit is a blue pixel unit.
Optionally, the first color pixel unit is a green pixel unit; the second color pixel unit is a red pixel unit; the third color pixel unit is a blue pixel unit.
Optionally, the pixel unit includes a thin film transistor and a liquid crystal capacitor.
Optionally, the thin film transistor of the red pixel unit is a first volume thin film transistor; the thin film transistor of the green pixel unit is a second volume thin film transistor; the thin film transistor of the blue pixel unit is a third volume thin film transistor; the first volume and the second volume are less than the third volume.
Optionally, the first volume is the same as the second volume.
Alternatively, in each row of pixel units, the colors of any adjacent three pixel units are different from each other.
In order to achieve the above object, the present invention further provides a display device, which includes a scan line driving module, a data line driving module, and the pixel driving circuit as described above; the pixel driving circuit comprises a plurality of data lines arranged along the column direction; the scanning line driving module is connected with the scanning lines of the pixel driving circuit, and the data line driving module is connected with the data lines in the pixel driving circuit.
Optionally, the device further includes a filtering module, a liquid crystal module, and a backlight module, which are stacked.
In order to achieve the above object, the present invention also provides a driving method of a pixel driving circuit, the method being applied to the display device as described above, the method including:
sequentially carrying out charging operation of a preset period on each row of pixel units;
in each preset period, the charging operation includes:
scanning pulse signals are respectively input to the first scanning line and the second scanning line through the scanning line driving module, square wave data signals are input to the data line through the data line driving module, when the pixel units connected with the first scanning line are charged, the pixel units connected with the second scanning line are precharged, and after the pixel units connected with the first scanning line are charged, the pixel units connected with the second scanning line are charged.
The invention provides a pixel driving circuit, a display device and a driving method of the pixel driving circuit, wherein the pixel driving circuit comprises a plurality of pairs of scanning lines and a plurality of pixel units, the plurality of pairs of scanning lines are arranged along the row direction, and the plurality of pixel units are arranged between each pair of scanning lines and are arranged in a matrix; wherein, the colors of the pixel units along the direction of the matrix column are the same; the pixel units along the row direction of the matrix comprise first color pixel units, second color pixel units and third color pixel units; each pair of scanning lines comprises a first scanning line and a second scanning line; the first scanning line in each pair of scanning lines is correspondingly connected with the first color pixel unit, and the second scanning line in each pair of scanning lines is correspondingly connected with the second color pixel unit. The first color pixel units with high distinguishing capability of human eyes share the first scanning line, and the second color pixel units with high distinguishing capability of human eyes share the second scanning line, so that the charging rates of the first color pixel units and the second color pixel units in the second color pixel units are consistent, the display brightness corresponding to the pixels is consistent, and the vertical bright and dark stripes are eliminated.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art 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 structures shown in the drawings without creative efforts.
FIG. 1 is a circuit diagram of a pixel driving circuit according to an embodiment of the present invention;
fig. 2 is a schematic level diagram of a scanning pulse signal and a square wave data signal of a pixel unit connected by a single scanning line;
fig. 3 is a connection circuit diagram of a single pixel unit.
The implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
The reference numbers illustrate:
| reference numerals | Name (R) | Reference numerals | Name (R) |
| 1 | First color pixel unit | R | |
| 2 | Second color pixel unit | G1 | A |
| 3 | Third color pixel unit | G2 | The |
| 4 | Thin film transistor | C1 | Liquid crystal capacitor |
| DATA | Data line | C2 | Holding capacitor |
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
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.
It should be noted that all directional indicators (such as up, down, left, right, front, and back) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, and the like in a specific posture (as shown in the drawings), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The present invention provides a pixel driving circuit, referring to fig. 1, fig. 1 is a circuit connection diagram of an embodiment of the pixel driving circuit of the present invention, where the pixel driving circuit includes a plurality of pairs of scanning lines and a plurality of pixel units (not labeled), the plurality of pairs of scanning lines are arranged along a row direction, and the plurality of pixel units are arranged between each pair of scanning lines and arranged in a matrix;
wherein, the colors of the pixel units along the direction of the matrix column are the same; the pixel units along the row direction of the matrix comprise first color pixel units, second color pixel units and third color pixel units; each pair of scan lines includes a first scan line G1 and a second scan line G2; the first scanning line G1 of each pair of scanning lines is correspondingly connected to the first color pixel unit, and the second scanning line G2 of each pair of scanning lines is correspondingly connected to the second color pixel unit.
The scan line is used to provide a signal for controlling a TFT (Thin Film Transistor) to be turned on or off. It can be understood that, in the pixel driving circuit of the present embodiment, a plurality of Data lines Data arranged along the column direction are further included, and the Data lines Data are used for transmitting signals corresponding to the display contents. It should be noted that the pixel driving circuit of this embodiment adopts a DRD design, and therefore, each Data line Data in this embodiment is connected to two pixel units in each column of pixel units; meanwhile, in the same column, the polarities of signals received by two pixel units connected to the same Data line Data at the same time are the same.
The pixel unit comprises a TFT, a liquid crystal capacitor C1 and a holding capacitor C2. The pixel unit is turned on or off according to signals sent by the scanning lines, and controls the voltage at two ends of the liquid crystal according to signals sent by the Data lines so as to control the deflection angle of the liquid crystal. The color of the pixel unit is the color of the filter corresponding to the liquid crystal controlled by the pixel unit. Typically, the colors of the pixel cells include red, green, and blue. The first color pixel unit, the second color pixel unit and the third color pixel unit are arranged one by one, namely, the colors of any adjacent three pixel units in each row of pixel units are different from each other; the specific arrangement sequence among the pixel units of the three colors can be set according to the actual situation, such as red, green, blue, green, red, blue, green, blue, red and the like.
Referring to fig. 2, fig. 2 is a schematic level diagram of a scan pulse signal and a square wave data signal of a pixel unit connected by a single scan line. In this embodiment, the first color pixel unit, the second color pixel unit, and the third color pixel unit are described in this order; the present embodiment sequentially describes the charging operation performed for each row of pixel units in a preset period;
in each preset period, the charging operation includes:
scanning pulse signals are respectively input to the first scanning line G1 and the second scanning line G2, square wave Data signals are input to the Data lines Data through the Data line Data driving module, so that when the pixel cells connected with the first scanning line G1 are charged, the pixel cells connected with the second scanning line G2 are precharged, and after the pixel cells connected with the first scanning line G1 are completely charged, the pixel cells connected with the second scanning line G2 are charged.
It can be understood that, in operation, the signal of the Data line Data needs to be polarity-inverted, and the polarity inversion is to apply a voltage signal with positive and negative polarity changes to the liquid crystal molecules to realize the alternating current driving of the liquid crystal molecules.
Take the pixel units connected by the first scanning line G1, the second scanning line G2, the first Data line Data and the second Data line Data as an example. When the scanning pulse signal input by the first scanning line G1 is at a high level, the TFT of the pixel cell connected to the first scanning line G1 is turned on, and at this time, the pixel cell connected to the first scanning line G1 writes the Data voltage of the connected Data line; specifically, the voltage polarity of the first Data line Data is positive, and since the voltage polarity of the previous stage is negative and opposite to the voltage polarity of the current stage, the first color pixel cell connected to the first scan line G1 and the first Data line Data is not precharged at the current stage, that is, the charging rate of the first color pixel cell is low; the voltage polarity of the second Data line Data is negative, and since the voltage polarity of the previous stage is positive and opposite to the voltage polarity of the current stage, the first color pixel cell connected to the first scan line G1 and the second Data line Data is not precharged at the current stage, i.e. the charging rate of the first color pixel cell is low;
when the scanning pulse signal inputted by the second scanning line G2 is at a high level, the TFT of the pixel cell connected to the second scanning line G2 is turned on, and the pixel cell connected to the second scanning line G2 writes the Data voltage of the connected Data line; specifically, the voltage polarity of the first Data line Data is positive, and since the voltage polarity of the previous stage is positive and is the same as the voltage polarity of the current stage, the second color pixel cell connected to the second scan line G2 and the first Data line Data is precharged at the current stage, that is, the charging rate of the second color pixel cell is higher; the voltage polarity of the second Data line Data is negative, and since the voltage polarity of the previous stage is negative, the pixel cells of the second color connected to the second scan line G2 and the second Data line Data are precharged at the present stage, i.e. the charging rate of the pixel cells of the second color is low.
By analogy, under the current Data polarity setting of the Data lines, all the first color pixel units are not precharged, and all the second color pixel units are precharged; the charging rate of the first color pixel unit is ensured to be consistent, and the charging rate of the second color pixel unit is ensured to be consistent, so that vertical bright and dark stripes in display are eliminated. It can be understood that the pre-charging states of the pixel units of the respective colors are different according to the polarity settings of the Data lines, and if it may happen that the pixel units of the first color are pre-charged and all the pixel units of the second color are not pre-charged, in this case, the charging rates of the pixel units of the first color can be ensured to be consistent, and the charging rates of the pixel units of the second color can be ensured to be consistent. It should be noted that the pixel unit of the third color in this embodiment is set as a pixel unit of a color with a low recognition capability by human eyes, so that the difference of the charging rates thereof is not enough to cause bright and dark stripes that can be recognized by human eyes.
Specifically, it can be found from the experimental results that the charging rate of the first pixel unit can be uniformly maintained at 95.4% when the pixel driving circuit of the present embodiment is employed; the charging rate of the second pixel units can be uniformly maintained at 99.8%; the charging rate of the precharged third pixel unit can be uniformly maintained at 99.8%; the charging rate of the third pixel unit without precharging can be uniformly maintained at 95.4%.
In the embodiment, the first color pixel units with high distinguishing capability of human eyes share the first scanning line, and the second color pixel units with high distinguishing capability of human eyes share the second scanning line, so that the charging rates of each pixel unit in the first color pixel units and the second color pixel units are consistent, the display brightness corresponding to the pixels is consistent, and the elimination of vertical bright and dark stripes is realized.
Further, the first color pixel unit is a red pixel unit; the second color pixel unit is a green pixel unit; the third color pixel unit is a blue pixel unit.
The first color pixel unit is a green pixel unit; the second color pixel unit is a red pixel unit; the third color pixel unit is a blue pixel unit.
It can be understood that the discrimination capability of the human eye for blue is much lower than that for red and green, and therefore, the third color pixel unit is set as the blue pixel unit, so that it is ensured that the charging rates of the red pixel unit and the green pixel unit, whose discrimination capabilities are higher, are the same for the human eye, and therefore, even in the case where the charging rates of the respective pixel units in the blue pixel unit are different, bright and dark stripes that can be recognized by the human eye do not occur.
Further, referring to fig. 3, fig. 3 is a connection circuit diagram of a single pixel unit. The pixel unit includes a thin film transistor 4 and a liquid crystal capacitor C1.
It is understood that the liquid crystal is sandwiched between two sheets of glass, the display electrode and the thin film transistor 4 are both located on the lower glass, and the common electrode is located on the upper glass, and therefore, the liquid crystal communicating the upper and lower glasses, the display electrode and the common electrode can be equivalent to a liquid crystal capacitor C1. The pixel unit can further comprise a holding capacitor C2, and the holding capacitor C2 is used for maintaining the voltage across the liquid crystal capacitor C1.
The gate of the thin film transistor 4 is connected to the scan line, the source of the thin film transistor 4 is connected to the Data line Data, the drain of the thin film transistor 4 is connected to the liquid crystal capacitor C1, and the liquid crystal capacitor C1 is connected in parallel to the holding capacitor C2.
When the scanning line outputs a high level, the gate of the thin film transistor 4 is at the high level, the thin film transistor 4 is turned on, the equivalent resistor R is at a low resistance state, and the voltage of the Data line Data can be written into the liquid crystal capacitor C1 through the thin film transistor 4;
when the scan line outputs a low level, the gate of the tft 4 is at a low level, the tft 4 is turned off, and the equivalent resistor R is in a high-impedance state, at this time, the voltage of the Data line Data cannot be written into the liquid crystal capacitor C1 through the tft 4, and the liquid crystal capacitor C1 maintains the voltages at both ends through the holding capacitor C2.
Further, the thin film transistor 4 of the red pixel unit is a first volume thin film transistor 4; the thin film transistor 4 of the green pixel unit is a second volume thin film transistor 4; the thin film transistor 4 of the blue pixel unit is a third volume thin film transistor 4; the first volume and the second volume are less than the third volume.
The first volume is the same as the second volume.
It is understood that the larger the volume of the thin film transistor 4, the higher the charging rate thereof, and therefore the volume of the thin film transistor 4 in the blue pixel unit is set to be larger, so that the charging rate of the blue pixel unit can be increased, and the difference in brightness between the blue pixel units can be further reduced. Specifically, when the sizes of the thin film transistors 4 in the red pixel unit, the green pixel unit and the blue pixel unit are the same, the charging rate of the red pixel unit can be uniformly maintained at 95.4%; the charging rate of the green pixel units can be uniformly maintained at 99.8%; the charging rate of the blue pixel units with precharging can be uniformly kept at 99.8%; the charging rate of the blue pixel cells without precharging can be uniformly maintained at 95.4%; when the red pixel unit and the green pixel unit have the same volume, and the thin film transistor 4 in the blue pixel unit has a larger volume, the charging rate of the red pixel unit can be uniformly maintained at 95.4%; the charging rate of the green pixel units can be uniformly maintained at 99.8%; the charging rate of the blue pixel cells with the precharge can be uniformly maintained at 99.9%; the charging rate of the blue pixel cells without precharging can be uniformly maintained at 99.6%. As can be seen from the above, after the size of the thin film transistor 4 in the blue pixel unit is increased, the charging rate difference between the blue pixel unit with the precharge and the blue pixel unit without the precharge is reduced from 4.4% to 0.3%, which greatly reduces the brightness difference between the blue pixel units.
The invention also provides a display device, which comprises a scanning line driving module, a data line driving module and the pixel driving circuit; the pixel driving circuit comprises a plurality of data lines arranged along the column direction; the scanning line driving module is connected with the scanning lines of the pixel driving circuit, and the data line driving module is connected with the data lines in the pixel driving circuit; the structure of the pixel driving circuit can refer to the above embodiments, and is not described herein again. It should be noted that, since the display device of the present embodiment adopts the technical solution of the pixel driving circuit, the display device has all the advantages of the pixel driving circuit.
Furthermore, the device also comprises a light filtering module, a liquid crystal module and a backlight module which are arranged in a stacked mode.
The modules are all commonly used in the existing display device, and are not described herein again.
The present invention also provides a driving method of a pixel driving circuit, the method being applied to the display device as described above, the method including:
sequentially carrying out charging operation of a preset period on each row of pixel units;
in each preset period, the charging operation includes:
scanning pulse signals are respectively input to the first scanning line and the second scanning line through the scanning line driving module, square wave data signals are input to the data line through the data line driving module, when the pixel units connected with the first scanning line are charged, the pixel units connected with the second scanning line are precharged, and after the pixel units connected with the first scanning line are charged, the pixel units connected with the second scanning line are charged.
It can be understood that, in operation, the signal of the data line needs to be polarity-inverted, and the polarity inversion is to apply a voltage signal with positive and negative polarity changes to the liquid crystal molecules to realize the alternating current driving of the liquid crystal molecules.
Take pixel units connected by a first scan line, a second scan line, a first data line and a second data line as an example. When a scanning pulse signal input by a first scanning line is in a high level, a TFT of a pixel unit connected with the first scanning line is turned on, and at the moment, the pixel unit connected with the first scanning line writes in a connected data line voltage; specifically, the voltage polarity of the first data line is positive, and since the voltage polarity of the previous stage is negative and is opposite to the voltage polarity of the current stage, the first color pixel unit connected to the first scan line and the first data line is not precharged at the current stage, that is, the charging rate of the first color pixel unit is low; the voltage polarity of the second data line is negative, and because the voltage polarity of the previous stage is positive and is opposite to the voltage polarity of the current stage, the first color pixel unit connected with the first scanning line and the second data line is not pre-charged in the current stage, namely the charging rate of the first color pixel unit is lower;
when the scanning pulse signal input by the second scanning line is in a high level, the TFT of the pixel unit connected with the second scanning line is turned on, and at the moment, the pixel unit connected with the second scanning line writes in the connected data line voltage; specifically, the voltage polarity of the first data line is positive, and since the voltage polarity of the previous stage is positive and is the same as the voltage polarity of the current stage, the second color pixel unit connected to the second scan line and the first data line is pre-charged at the current stage, that is, the charging rate of the second color pixel unit is higher; the voltage polarity of the second data line is negative, and since the voltage polarity of the previous stage is negative, the second color pixel unit connected to the second scan line and the second data line is pre-charged at the present stage, i.e. the charging rate of the second color pixel unit is low.
By analogy, under the current data line polarity setting, all the first color pixel units are not precharged, and all the second color pixel units are precharged; the charging rate of the first color pixel unit is ensured to be consistent, and the charging rate of the second color pixel unit is ensured to be consistent, so that vertical bright and dark stripes in display are eliminated. It can be understood that the pre-charge states of the pixel units of the respective colors are different according to the polarity settings of the data lines, and if it may happen that the pixel units of the first color are pre-charged and all the pixel units of the second color are not pre-charged, in this case, the charging rates of the pixel units of the first color can be ensured to be consistent, and the charging rates of the pixel units of the second color can be ensured to be consistent. It should be noted that the pixel unit of the third color in this embodiment is set as a pixel unit of a color with a low recognition capability by human eyes, so that the difference of the charging rates thereof is not enough to cause bright and dark stripes that can be recognized by human eyes.
In the embodiment, the first color pixel units with high distinguishing capability of human eyes share the first scanning line, and the second color pixel units with high distinguishing capability of human eyes share the second scanning line, so that the charging rates of each pixel unit in the first color pixel units and the second color pixel units are consistent, the display brightness corresponding to the pixels is consistent, and the elimination of vertical bright and dark stripes is realized.
It should be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or system that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or system. The term "comprising", without further limitation, means that the element so defined is not excluded from the group of processes, methods, articles, or systems that include the element. The above-mentioned serial numbers of the embodiments of the present invention are merely for description and do not represent the merits of the embodiments.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A pixel driving circuit is characterized by comprising a plurality of pairs of scanning lines and a plurality of pixel units, wherein the scanning lines are arranged along a row direction, and the pixel units are arranged between each pair of scanning lines and arranged in a matrix;
wherein, the colors of the pixel units along the direction of the matrix column are the same; the pixel units along the row direction of the matrix comprise first color pixel units, second color pixel units and third color pixel units; each pair of scanning lines comprises a first scanning line and a second scanning line; the first scanning line in each pair of scanning lines is correspondingly connected with the first color pixel unit, and the second scanning line in each pair of scanning lines is correspondingly connected with the second color pixel unit.
2. The pixel driving circuit according to claim 1, wherein the first color pixel cell is a red pixel cell; the second color pixel unit is a green pixel unit; the third color pixel unit is a blue pixel unit.
3. The pixel driving circuit according to claim 1, wherein the first color pixel cell is a green pixel cell; the second color pixel unit is a red pixel unit; the third color pixel unit is a blue pixel unit.
4. A pixel driving circuit as claimed in claim 2 or 3, wherein the pixel cell comprises a thin film transistor and a liquid crystal capacitor.
5. The pixel driving circuit according to claim 4, wherein the thin film transistor of the red pixel cell is a first bulk thin film transistor; the thin film transistor of the green pixel unit is a second volume thin film transistor; the thin film transistor of the blue pixel unit is a third volume thin film transistor; the first volume and the second volume are both smaller than the third volume.
6. The pixel driving circuit of claim 5, wherein the first volume is the same as the second volume.
7. The pixel driving circuit according to claim 6, wherein colors of any adjacent three pixel cells are different from each other in each row of the pixel cells.
8. A display device, comprising a scanning line driving module, a data line driving module, and a pixel driving circuit according to any one of claims 1 to 7; the pixel driving circuit comprises a plurality of data lines arranged along the column direction; the scanning line driving module is connected with the scanning lines of the pixel driving circuit, and the data line driving module is connected with the data lines in the pixel driving circuit.
9. The display device of claim 8, further comprising a filter module, a liquid crystal module, and a backlight module arranged in a stack.
10. A driving method of a pixel driving circuit, which is applied to the display device according to claim 8 or 9, the method comprising:
sequentially carrying out charging operation of a preset period on each row of pixel units;
in each preset period, the charging operation includes:
scanning pulse signals are respectively input to the first scanning line and the second scanning line through the scanning line driving module, square wave data signals are input to the data line through the data line driving module, when the pixel units connected with the first scanning line are charged, the pixel units connected with the second scanning line are precharged, and after the pixel units connected with the first scanning line are charged, the pixel units connected with the second scanning line are charged.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110345616.2A CN112951174B (en) | 2021-03-30 | 2021-03-30 | Pixel driving circuit, display device and driving method of pixel driving circuit |
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