CN109830217B - Liquid crystal display panel, display device and driving method - Google Patents
Liquid crystal display panel, display device and driving method Download PDFInfo
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- CN109830217B CN109830217B CN201910280258.4A CN201910280258A CN109830217B CN 109830217 B CN109830217 B CN 109830217B CN 201910280258 A CN201910280258 A CN 201910280258A CN 109830217 B CN109830217 B CN 109830217B
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Abstract
The embodiment of the invention provides a liquid crystal display panel, a display device and a driving method, relates to the technical field of display, can drive the liquid crystal display panel to realize the display of an electronic tag by using a simpler driving mode, and has smaller power consumption and lower cost in the driving process. The liquid crystal display panel includes: a plurality of pixels; in each pixel, the control ends of the first charging switch tube, the second charging switch tube and the third charging switch tube are electrically connected to a control node; the first charging switch tube and the first control switch tube are connected in series between the first pixel electrode and the charging node, the second charging switch tube is connected in series between the second pixel electrode and the charging node, and the third charging switch tube and the second control switch tube are connected in series between the third pixel electrode and the charging node.
Description
Technical Field
The invention relates to the technical field of display, in particular to a liquid crystal display panel, a display device and a driving method.
Background
The electronic tag is a display device capable of replacing a traditional paper tag, and generally only three specific colors need to be displayed due to the requirement of an application scene, so that a simple picture can be realized, for example, black characters on white background or black characters on yellow background are displayed.
The existing liquid crystal display panel can realize rich color picture display, so if the existing liquid crystal display panel is used for realizing the display of the electronic tag, the power consumption in the driving process is larger, and the cost is higher.
Disclosure of Invention
The embodiment of the invention provides a liquid crystal display panel, a display device and a driving method, which can drive the liquid crystal display panel to realize the display of an electronic tag by using a simpler driving mode, and have the advantages of lower power consumption and lower cost in the driving process.
In one aspect, an embodiment of the present invention provides a liquid crystal display panel, including:
a plurality of pixels arranged in a matrix in a row direction and a column direction;
each pixel comprises a first control switch tube, a second control switch tube, a first sub-pixel, a second sub-pixel and a third sub-pixel which are arranged along the row direction;
the first sub-pixel comprises a first pixel electrode and a first charging switch tube, the second sub-pixel comprises a second pixel electrode and a second charging switch tube, and the third sub-pixel comprises a third pixel electrode and a third charging switch tube;
each of the pixels includes a control node and a charge node;
in each pixel, the control ends of the first charging switch tube, the second charging switch tube and the third charging switch tube are electrically connected to the control node;
in each pixel, the first charge switch tube and the first control switch tube are connected in series between the first pixel electrode and the charge node, the second charge switch tube is connected in series between the second pixel electrode and the charge node, and the third charge switch tube and the second control switch tube are connected in series between the third pixel electrode and the charge node;
a scan line corresponding to each row of the pixels, the scan line being electrically connected to a control node of each of the pixels in a corresponding row of the pixels;
and the data line is electrically connected with the charging node of each pixel in the corresponding column of pixels.
Optionally, the liquid crystal display panel further includes:
the first control signal wire is electrically connected to the control end of each first control switch tube;
and the second control signal wire is electrically connected to the control end of each second control switch tube.
Optionally, all of the first sub-pixels in the plurality of pixels are same color sub-pixels;
all of the second subpixels in the plurality of pixels are same color subpixels;
all of the third subpixels in the plurality of pixels are same color subpixels.
Optionally, the second sub-pixel is a white sub-pixel.
Optionally, one of the first sub-pixel and the third sub-pixel is a yellow sub-pixel, and the other of the first sub-pixel and the third sub-pixel is a white sub-pixel.
Optionally, one of the first sub-pixel and the third sub-pixel is a yellow sub-pixel, and the other of the first sub-pixel and the third sub-pixel is a red sub-pixel.
Optionally, the yellow sub-pixel comprises a red color resistance and a green color resistance for filtering.
On the other hand, an embodiment of the invention further provides a display device, which includes the liquid crystal display panel.
On the other hand, an embodiment of the present invention further provides a driving method for the above-mentioned liquid crystal display panel, where the driving method includes:
periodic charging periods, each of the charging periods comprising a first charging period and a second charging period;
in the first charging period, the first control switch tube is controlled to be switched on, the second control switch tube is controlled to be switched off, and the data voltage on the data line is transmitted to the first pixel electrode and the second pixel electrode;
and in the second charging period, the first control switch tube is controlled to be switched off, and the first control switch tube is controlled to be switched on, so that the data voltage on the data line is transmitted to the second pixel electrode and the third pixel electrode.
Optionally, in the first charging period, a conducting level is sequentially provided for each scanning line, so that the pixels enter a charging state line by line, the first charging switch tube, the second charging switch tube and the third charging switch tube in the pixels entering the charging state are turned on, the first control switch tube is controlled to be turned on, the second control switch tube is controlled to be turned off, and data voltages on the data lines are transmitted to the first pixel electrode and the second pixel electrode in the pixels entering the charging state line by line;
in the second charging period, a conducting level is sequentially provided for each scanning line, so that the pixels enter a charging state line by line, the first control switch tube is controlled to be turned off, the second control switch tube is controlled to be turned on, and data voltages on the data lines are transmitted to the second pixel electrode and the third pixel electrode in the pixels entering the charging state line by line.
According to the liquid crystal display panel, the display device and the driving method, on one hand, for one pixel, three sub-pixels are connected with the driving chip through the same data line, and each sub-pixel is not required to be connected with the driving chip through a separate data line, so that the number of pins of the driving chip is saved, and the cost is reduced; on the other hand, for one pixel, three sub-pixels only need to receive two independent data voltages, and a driving chip does not need to generate corresponding data voltage signals for each sub-pixel, so that the power consumption of the driving chip is reduced.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a schematic diagram of a partial area of a liquid crystal display panel according to an embodiment of the present invention;
FIG. 2 is an enlarged partial view of a portion of the area of FIG. 1;
FIG. 3 is a schematic diagram of an equivalent structure of a pixel in FIG. 1;
FIG. 4 is a timing diagram corresponding to a pixel in FIG. 3;
FIG. 5 is a timing diagram of the rows of pixels of FIG. 2;
fig. 6 is a schematic structural diagram of a display device according to an embodiment of the invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, 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 some, but not all, embodiments of the present invention. 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.
The terminology used in the embodiments of the invention is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used in the examples of the present invention and the appended claims, the singular forms "a," "an," and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise.
As shown in fig. 1, fig. 2 and fig. 3, fig. 1 is a schematic structural diagram of a partial region of a liquid crystal display panel according to an embodiment of the present invention, fig. 2 is a schematic partial enlarged view of the partial region of fig. 1, and fig. 3 is a schematic equivalent structural diagram of a pixel in fig. 1, where an embodiment of the present invention provides a liquid crystal display panel, including: a plurality of pixels 1 arranged in a matrix in the row direction h1 and the column direction h 2; each pixel 1 comprises a first control switch tube M1, a second control switch tube M2, and a first sub-pixel 11, a second sub-pixel 12 and a third sub-pixel 13 which are arranged along the row direction h 1; the first sub-pixel 11 comprises a first pixel electrode 10 and a first charging switch tube T1, the second sub-pixel 12 comprises a second pixel electrode 20 and a second charging switch tube T2, and the third sub-pixel 13 comprises a third pixel electrode 30 and a third charging switch tube T3; each pixel 1 includes a control node N1 and a charge node N2; in each pixel 1, the control ends of the first charging switch tube T1, the second charging switch tube T2 and the third charging switch tube T3 are electrically connected to a control node N1; in each pixel 1, the first charging switch tube T1 and the first control switch tube M1 are connected in series between the first pixel electrode 10 and the charging node N2, for example, the first end of the first charging switch tube T1 is electrically connected to the first pixel electrode 10, the second end of the first charging switch tube T1 is electrically connected to the first end of the first control switch tube M1, the second end of the first control switch tube M1 is electrically connected to the charging node N2, the second charging switch tube T2 is connected in series between the second pixel electrode 20 and the charging node N2, for example, the first end of the second charging switch tube T2 is electrically connected to the second pixel electrode 20, the second end of the second charging switch tube T2 is electrically connected to the charging node N2, the third charging switch tube T3 and the second control switch tube M2 are connected in series between the third pixel electrode 30 and the charging node N2, for example, the first end of the third charging switch tube T3 is electrically connected to the third pixel electrode 30, a second terminal of the third charging switch transistor T3 is electrically connected to the first terminal of the second control switch transistor M2, and a second terminal of the second control switch transistor M2 is electrically connected to the charging node N2; a scan line Gate corresponding to each row of pixels 1, the scan line Gate being electrically connected to the control node N1 of each pixel 1 in the corresponding row of pixels 1; the Data line Data corresponding to each column of the pixels 1 is electrically connected to the charging node N2 of each pixel 1 in the corresponding column of the pixels 1.
As shown in fig. 3 and 4, fig. 4 is a timing signal diagram corresponding to one pixel in fig. 3, and the embodiment of the invention further provides a driving method for the liquid crystal display panel, where in fig. 4, VGate is used to represent the voltage of the scan line Gate, the control terminal of the first control switch M1 is electrically connected to the first control signal line K1, the control terminal of the second control switch M2 is electrically connected to the second control signal line K2, VK1 is used to represent the voltage of the first control signal line K1, and VK2 is used to represent the voltage of the second control signal line K2, it should be noted that the switches in fig. 3 are all P-type transistors, the P-type transistors have the characteristics of low-level on and high-level off, and the N-type transistors have the characteristics of high-level on and low-level off, and the embodiments of the invention are not limited to the types of the switches, and only take the P-type transistors as an example for explanation, the driving method comprises the following steps: periodic charging periods t, each charging period t comprising a first charging period t1 and a second charging period t 2; in the first charging period t1, the first control switch M1 is controlled to be turned on, and the second control switch M2 is controlled to be turned off, so that the Data voltage on the Data line Data is transmitted to the first pixel electrode 10 and the second pixel electrode 20; in the second charging period t2, the first control switch M1 is turned off, and the first control switch M2 is turned on, so that the Data voltage on the Data line Data is transmitted to the second pixel electrode 20 and the third pixel electrode 30.
Specifically, in the embodiment of the present invention, the liquid crystal display panel further includes a common electrode, a liquid crystal layer, and a color filter substrate (not shown in the figure), in a working process of the liquid crystal display panel, a common electrode voltage is applied to the common electrode, a corresponding pixel electrode voltage is applied to each pixel electrode, an electric field is generated between the pixel electrode and the common electrode, liquid crystals in the liquid crystal layer corresponding to the sub-pixels are deflected under the action of the electric field, so as to implement gray scale display corresponding to the sub-pixels, and the color filter substrate has a color resistance corresponding to the sub-pixels, and is used for filtering emergent light of the sub-pixels to display corresponding colors. In the embodiment of the invention, the application scene of the liquid crystal display panel is the electronic tag, so that rich color display is not required, and only simple color and pattern display is required to be realized through driving. The Data lines Data are used for providing Data voltages for the sub-pixels, charging the pixel electrodes of the corresponding sub-pixels, and are electrically connected to a driving chip (not shown), and the driving chip generates the Data voltages.
The liquid crystal display panel and the driving method in the embodiment of the present invention are explained below by taking a driving process of one pixel as an example:
as shown in fig. 3 and 4, in the first charging period T1, when the scan line Gate is at a low level (on level), the first charging switch tube T1, the second charging switch tube T2 and the third charging switch tube T3 are controlled to be turned on, the first control signal line K1 is at a low level (on level), the first control switch tube M1 is controlled to be turned on, the second control signal line K2 is at a high level (off level), the second control switch tube M2 is controlled to be turned off, the Data voltage on the Data line Data is transmitted to the first pixel electrode 10 through the first control switch tube M1 and the first charging switch tube T1, and meanwhile, the Data voltage on the Data line Data is transmitted to the second pixel electrode 20 through the second charging switch tube T2, that is, the charging of the first pixel electrode 10 is achieved; in the second charging period T2, when the scan line Gate is at a low level (on level), the first charging switch tube T1, the second charging switch tube T2 and the third charging switch tube T3 are controlled to be turned on, the first control signal line K1 is at a high level, the first control switch tube M1 is controlled to be turned off, the second control signal line K2 is at a low level, the second control switch tube M2 is controlled to be turned on, the Data voltage on the Data line Data is transmitted to the third pixel electrode 30 through the second control switch tube M2 and the third charging switch tube T3, and meanwhile, the Data voltage on the Data line Data is transmitted to the second pixel electrode 20 through the second charging switch tube T2, that is, the charging of the second pixel electrode 20 and the third pixel electrode 30 is realized. The first charging period t1 and the second charging period t2 constitute the charging process of the whole pixel 1, one pixel 1 includes three sub-pixels, wherein the second pixel electrode 20 receives the Data voltage signal on the Data line Data during both the first charging period t1 and the second charging period t2, and therefore the pixel voltage on the second pixel electrode 20 is determined by the Data voltage on the Data line Data during the second charging period t 2.
It should be noted that, in the prior art, a liquid crystal display panel is used to present rich colors, for example, one pixel includes a red sub-pixel, a blue sub-pixel and a green sub-pixel, a pixel electrode corresponding to each sub-pixel receives a data voltage of a corresponding point, a data voltage value is related to a gray scale value of the sub-pixel to reflect the luminance of the sub-pixel, the three sub-pixels with different colors and different luminances are overlapped to form a color pixel, and a large number of pixels implement the color graphic display of the whole liquid crystal display panel. Therefore, in the prior art, on one hand, each sub-pixel needs a separate data line to be connected with a driving chip, and the driving chip needs more data line pins, so that the cost is higher; on the other hand, each sub-pixel needs to receive an independent data voltage, and the data voltage comes from the driving chip, so that in the driving process, the driving chip drives each sub-pixel to generate an independent data voltage signal, and the power consumption is high. In the embodiment of the present invention, the liquid crystal display panel is only used for displaying a picture, for example, the second sub-pixel 12 is only a sub-pixel for auxiliary display, and may be a white sub-pixel, and the function of the white sub-pixel is only brightness enhancement, and the gray scale value corresponding to the second sub-pixel 12 is the same as the gray scale value corresponding to the third sub-pixel 13, that is, the display of the color pixel is realized by the combination of different colors between the first sub-pixel 11 and the third sub-pixel 13, and since there is no need to realize rich colors, the combination of two colors can realize the display of the electronic tag.
According to the liquid crystal display panel and the driving method, on one hand, for one pixel, three sub-pixels are connected with the driving chip through the same data line, and each sub-pixel is not required to be connected with the driving chip through a separate data line, so that the number of pins of the driving chip is saved, and the cost is reduced; on the other hand, for one pixel, three sub-pixels only need to receive two independent data voltages, and a driving chip does not need to generate corresponding data voltage signals for each sub-pixel, so that the power consumption of the driving chip is reduced.
Optionally, the liquid crystal display panel further includes: a first control signal line K1 electrically connected to the control end of each first control switch tube M1; and a second control signal line K2 electrically connected to the control terminal of each second control switch tube M2.
Specifically, since each pixel 1 has the same structure, each pixel 1 can be driven in the same manner to reduce power consumption during driving, and in the entire liquid crystal display panel, the same first control signal line K1 is used to electrically connect the control terminal of the first control switch M1 corresponding to each pixel 1, and the same first control signal line K2 is used to electrically connect the second control switch M2 corresponding to each pixel 1. It should be noted that each pixel 1 includes a first control switch M1 and a second control switch M2, that is, the first control switch M1 and the second control switch M2 are disposed at positions between the pixel electrodes in the display region, and therefore, the first control signal line K1 and the second control signal line K2 are also distributed at positions between the pixel electrodes in the display region, so as to implement the connection between the first control switch M1 and the second control switch M2 of each pixel in the whole liquid crystal display panel.
Optionally, all the first sub-pixels 11 in the plurality of pixels 1 are same color sub-pixels; all the second sub-pixels 12 in the plurality of pixels 1 are same color sub-pixels; all the third sub-pixels 13 in the plurality of pixels 1 are the same color sub-pixels.
Specifically, when the first control signal line K1 is electrically connected to the first control switch tube M1 corresponding to each pixel 1, and the second control signal line K2 is electrically connected to the second control switch tube M2 corresponding to each pixel 1, each pixel 2 has the same driving process, all the first sub-pixels 11 are set as the same-color sub-pixels, all the second sub-pixels 12 are set as the same-color sub-pixels, and all the third sub-pixels 13 are set as the same-color sub-pixels.
Optionally, the second sub-pixel 12 is a white sub-pixel.
Specifically, the second sub-pixel 12 is a white sub-pixel, and the second sub-pixel 12 can be used as a sub-pixel for auxiliary display, that is, the second sub-pixel 12 does not need to form a color pixel together with sub-pixels of other colors, but only plays a role of brightness enhancement, and during the charging process of the same pixel 1, the second sub-pixel 12 and the third sub-pixel 13 simultaneously receive the Data voltage on the same Data line Data in the second charging period t2, so that the second sub-pixel 12 and the third sub-pixel 13 have the same gray scale, wherein the color of the third sub-pixel 13 is used for being overlapped with the color of the first sub-pixel 11 to realize the display of the color pixel, and the second sub-pixel 12 only plays a role of brightness enhancement.
Alternatively, one of the first subpixel 11 and the third subpixel 13 is a yellow subpixel, and the other of the first subpixel 11 and the third subpixel 13 is a white subpixel.
Specifically, for example, the first sub-pixel 11 is a yellow sub-pixel, the second sub-pixel 12 is a white sub-pixel, and the third sub-pixel 13 is a white sub-pixel, in the electronic tag, two colors or three colors need to be displayed, for example, a white word under yellow, a black word under yellow, and the like are displayed, for the pixel 1 at the yellow position in the picture, in the first charging period t1, the first pixel electrode 10 and the second pixel electrode 20 receive the data voltage corresponding to the maximum gray level value, and in the second charging period t2, the second pixel electrode 20 and the third pixel electrode 30 receive the data voltage corresponding to the maximum gray level value, so that after the pixel 1 is charged, the display of the yellow pixel is realized; for the pixel 1 at the white position in the picture, in the first charging period t1, the first pixel electrode 10 and the second pixel electrode 20 receive the data voltage corresponding to the minimum gray-scale value, and in the second charging period t2, the second pixel electrode 20 and the third pixel electrode 30 receive the data voltage corresponding to the maximum gray-scale value, so that after the charging of the pixel 1 is completed, the display of the white pixel is realized; for the pixel 1 at the black position in the screen, the first pixel electrode 10 and the second pixel electrode 20 receive the data voltage corresponding to the minimum gray-scale value during the first charging period t1, and the second pixel electrode 20 and the third pixel electrode 30 receive the data voltage corresponding to the minimum gray-scale value during the second charging period t2, so that the display of the black pixel is realized after the charging of the pixel 1 is completed.
Alternatively, one of the first subpixel 11 and the third subpixel 13 is a yellow subpixel, and the other of the first subpixel 11 and the third subpixel 13 is a red subpixel.
Specifically, for example, the first sub-pixel 11 bit yellow sub-pixel, the second sub-pixel 12 white sub-pixel, and the third sub-pixel 13 red sub-pixel, for example, for the pixel 1 at the yellow position in the picture, the first pixel electrode 10 and the second pixel electrode 20 receive the data voltage corresponding to the maximum gray scale value in the first charging period t1, and the second pixel electrode 20 and the third pixel electrode 30 receive the data voltage corresponding to the minimum gray scale value in the second charging period t2, so that the display of the yellow pixel is realized after the charging of the pixel 1 is completed; for a pixel at a red position in a picture, in a first charging period t1, the first pixel electrode 10 and the second pixel electrode 20 receive a data voltage corresponding to a minimum gray-scale value, and in a second charging period t2, the second pixel electrode 20 and the third pixel electrode 30 receive a data voltage corresponding to a maximum gray-scale value, so that after the pixel 1 is completely charged, the display of a red pixel is realized; for a pixel at a black position in a screen, in the first charging period t1 and the second charging period t2, the first pixel electrode 10, the second pixel electrode 20, and the third pixel electrode 30 all receive a data voltage corresponding to a minimum gray-scale value, so that after the charging of the pixel 1 is completed, the display of the black pixel is realized.
Optionally, the yellow sub-pixel comprises a red color resistance and a green color resistance for filtering.
Specifically, for a yellow sub-pixel, a corresponding yellow color resistor is arranged on a color film substrate and used for directly filtering emergent light into yellow light and then emitting the yellow light; however, since the yellow color resistor is relatively expensive to manufacture, another implementation is to divide the opening of the sub-pixel into two parts, wherein one part is provided with a red color resistor, the other part is provided with a green color resistor, the emergent light is filtered into red light and green light for emergence, and the red light and the green light can be perceived as yellow by human eyes after being combined.
Alternatively, as shown in fig. 1, fig. 2, fig. 3 and fig. 5, fig. 5 is a timing signal diagram corresponding to a plurality of rows of pixels in fig. 2, in fig. 5, VGate1, VGate2, … and VGateN are respectively used to represent voltages of a first scan line Gate, a second scan line Gate, … and an nth scan line Gate, in the above method, in a first charging period T1, an on level (low level) is sequentially provided for each scan line Gate to make the pixel 1 enter a charging state line by line, a first charging switch tube T1, a second charging switch tube T2 and a third charging switch tube T3 in the pixel 1 entering the charging state are turned on, the first control switch tube M1 is controlled to be turned on, the second control switch tube M2 is controlled to be turned off, and a Data voltage on the Data line Data is transmitted to a first pixel electrode 10 and a second pixel electrode 20 in the pixel 1 entering the charging state line by line; in the second charging period t2, a turn-on level (low level) is sequentially provided for each scan line Gate to make the pixels 1 enter the charging state row by row, the first control switch tube M1 is controlled to be turned off, and the second control switch tube M2 is controlled to be turned on, so that the Data voltages on the Data lines Data are transmitted to the second pixel electrode 20 and the third pixel electrode 30 in the pixels 1 entering the charging state row by row.
Specifically, for example, in the first charging period t1, first, the scanning line Gate corresponding to the first row pixel 1 is supplied with the low level, at this time, the other scanning lines Gate are supplied with the high level, namely, all the first charging switch transistor T1, the second charging switch transistor T2 and the third charging switch transistor T3 in the first row of pixels 1 are turned on, the first charging switch transistor T1, the second charging switch transistor T2 and the third charging switch transistor T3 corresponding to the pixels 1 in other rows are all turned off, even if the first row of pixels 1 enters the charged state and the other rows of pixels 1 enter the non-charged state, since the first control switch M1 is turned on and the second control switch M2 is turned off, the Data voltage on the Data line Data is transmitted to the first pixel electrode 10 and the second pixel electrode 20 in the first row of pixels 1, thereby realizing the charging of the first pixel electrode 10 and the second pixel electrode 20 in the first row of pixels 1; after the first pixel electrode 10 and the second pixel electrode 20 in the first row of pixels 1 are charged, providing a low level for the scan line Gate corresponding to the second row of pixels 1, where other scan lines all provide a high level, that is, all of the first charging switch tube T1, the second charging switch tube T2, and the third charging switch tube T3 in the second row of pixels 1 are turned on, and all of the first charging switch tube T1, the second charging switch tube T2, and the third charging switch tube T3 in other rows of pixels 1 are turned off, so that even if the second row of pixels 1 enters a charging state and other rows of pixels 1 enter a non-charging state, the Data voltage on the Data line Data is transmitted to the first pixel electrode 10 and the second pixel electrode 20 in the second row of pixels 1, thereby realizing the charging of the first pixel electrode 10 and the second pixel electrode 20 in the second row of pixels 1; by analogy, in the first charging period t1, the charging of the first pixel electrode 10 and the second pixel electrode 20 in all rows of the pixels 1 is completed, and then the second charging period t2 is entered. In the second charging period t2, first, the scan line Gate corresponding to the first row of pixels 1 is supplied with the low level, at this time, the other scan lines Gate are supplied with the high level, namely, all the first charging switch transistor T1, the second charging switch transistor T2 and the third charging switch transistor T3 in the first row of pixels 1 are turned on, the first charging switch T1, the second charging switch T2 and the third charging switch T3 corresponding to the pixels 1 in the other rows and the pixels 1 in the other rows are all turned off, even if the first row of pixels 1 enters the charged state and the other rows of pixels 1 enter the non-charged state, since the first control switch M1 is turned off and the second control switch M2 is turned on, the Data voltage on the Data line Data is transmitted to the second pixel electrode 20 and the third pixel electrode 30 in the first row of pixels 1, thereby realizing the charging of the second pixel electrode 20 and the third pixel electrode 30 in the first row of pixels 1; after the second pixel electrode 20 and the third pixel electrode 30 in the first row of pixels 1 are charged, providing a low level for the scan line Gate corresponding to the second row of pixels 1, where other scan lines all provide a high level, that is, all of the first charging switch tube T1, the second charging switch tube T2, and the third charging switch tube T3 in the second row of pixels 1 are turned on, and all of the first charging switch tube T1, the second charging switch tube T2, and the third charging switch tube T3 in other rows of pixels 1 are turned off, so that even if the second row of pixels 1 enters a charging state and other rows of pixels 1 enter a non-charging state, the Data voltage on the Data line Data is transmitted to the second pixel electrode 20 and the third pixel electrode 30 in the second row of pixels 1, thereby realizing the charging of the second pixel electrode 20 and the third pixel electrode 30 in the second row of pixels 1; by analogy, in the second charging period t2, the charging of the first pixel electrode 10 and the second pixel electrode 20 in all rows of the pixels 1 is completed. In the charging period t consisting of the first charging period t1 and the second charging period t2, charging of all pixels 1 in the liquid crystal display panel is completed, one refreshing of a complete picture of the liquid crystal display panel is realized, and then, the next charging period t is entered for the next refreshing of the picture.
It should be noted that, the liquid crystal display panel in the embodiment of the present invention may be driven by applying the above-mentioned driving method, or may be driven by applying another driving method, and since the liquid crystal display panel is used as an electronic tag, and the picture of the electronic tag does not need to be frequently changed, for example, the scanning lines Gate may be set to be directly controlled by the driving chip, and the liquid crystal display panel does not need to be continuously and frequently refreshed, but when the picture of the electronic tag is changed, the corresponding pixels 1 are directly charged in the area where the picture is changed through the corresponding scanning lines Gate and Data lines Data, and the first control signal line K1 and the second control signal line K2, so as to refresh the display picture.
As shown in fig. 6, fig. 6 is a schematic structural diagram of a display device according to an embodiment of the present invention, and the embodiment of the present invention further provides a display device including the liquid crystal display panel 100.
The specific structure and principle of the lcd panel 100 are the same as those of the above embodiments, and are not described herein again. The display device may be any electronic device having a display function, such as a touch display screen, an electronic paper book, or an electronic tag.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the invention, and any modifications, equivalents, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A liquid crystal display panel, comprising:
a plurality of pixels arranged in a matrix in a row direction and a column direction;
each pixel comprises a first control switch tube, a second control switch tube, a first sub-pixel, a second sub-pixel and a third sub-pixel which are arranged along the row direction;
the first sub-pixel comprises a first pixel electrode and a first charging switch tube, the second sub-pixel comprises a second pixel electrode and a second charging switch tube, and the third sub-pixel comprises a third pixel electrode and a third charging switch tube;
each of the pixels includes a control node and a charge node;
in each pixel, the control ends of the first charging switch tube, the second charging switch tube and the third charging switch tube are electrically connected to the control node;
in each pixel, the first charge switch tube and the first control switch tube are connected in series between the first pixel electrode and the charge node, the second charge switch tube is connected in series between the second pixel electrode and the charge node, and the third charge switch tube and the second control switch tube are connected in series between the third pixel electrode and the charge node;
a scan line corresponding to each row of the pixels, the scan line being electrically connected to a control node of each of the pixels in a corresponding row of the pixels;
and the data line is electrically connected with the charging node of each pixel in the corresponding column of pixels.
2. The liquid crystal display panel according to claim 1, further comprising:
the first control signal wire is electrically connected to the control end of each first control switch tube;
and the second control signal wire is electrically connected to the control end of each second control switch tube.
3. The liquid crystal display panel according to claim 1,
all of the first subpixels in the plurality of pixels are same color subpixels;
all of the second subpixels in the plurality of pixels are same color subpixels;
all of the third subpixels in the plurality of pixels are same color subpixels.
4. The liquid crystal display panel according to claim 1,
the second sub-pixel is a white sub-pixel.
5. The liquid crystal display panel according to claim 4,
one of the first sub-pixel and the third sub-pixel is a yellow sub-pixel, and the other of the first sub-pixel and the third sub-pixel is a white sub-pixel.
6. The liquid crystal display panel according to claim 4,
one of the first sub-pixel and the third sub-pixel is a yellow sub-pixel, and the other of the first sub-pixel and the third sub-pixel is a red sub-pixel.
7. The liquid crystal display panel according to claim 5 or 6,
the yellow sub-pixel includes a red color resistance and a green color resistance for filtering light.
8. A display device comprising the liquid crystal display panel according to any one of claims 1 to 7.
9. A driving method for the liquid crystal display panel according to any one of claims 1 to 7, comprising:
periodic charging periods, each of the charging periods comprising a first charging period and a second charging period;
in the first charging period, the first control switch tube is controlled to be switched on, the second control switch tube is controlled to be switched off, and the data voltage on the data line is transmitted to the first pixel electrode and the second pixel electrode;
and in the second charging period, the first control switch tube is controlled to be switched off, and the second control switch tube is controlled to be switched on, so that the data voltage on the data line is transmitted to the second pixel electrode and the third pixel electrode.
10. The driving method according to claim 9,
in the first charging period, sequentially providing a conducting level for each scanning line to enable the pixels to enter a charging state line by line, wherein the first charging switch tube, the second charging switch tube and the third charging switch tube in the pixels entering the charging state are conducted to control the first control switch tube to be conducted and the second control switch tube to be cut off, so that the data voltage on the data line is transmitted to the first pixel electrode and the second pixel electrode in the pixels entering the charging state line by line;
in the second charging period, a conducting level is sequentially provided for each scanning line, so that the pixels enter a charging state line by line, the first control switch tube is controlled to be turned off, the second control switch tube is controlled to be turned on, and data voltages on the data lines are transmitted to the second pixel electrode and the third pixel electrode in the pixels entering the charging state line by line.
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| Publication number | Priority date | Publication date | Assignee | Title |
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| US7584888B2 (en) * | 2002-06-04 | 2009-09-08 | Industrial Technology Research Institute | Item tag with liquid crystal display and image |
| JP4530167B2 (en) * | 2005-09-22 | 2010-08-25 | セイコーエプソン株式会社 | Electrophoresis device, electronic apparatus, and method for driving electrophoresis device |
| JP2007256728A (en) * | 2006-03-24 | 2007-10-04 | Seiko Epson Corp | Display device and electronic equipment |
| CN102023453B (en) * | 2009-09-23 | 2012-10-10 | 鸿富锦精密工业（深圳）有限公司 | Electronic paper and display device thereof |
| CN201859469U (en) * | 2010-11-02 | 2011-06-08 | 深圳市阳华实业有限公司 | LCD (liquid crystal display) electronic price displaying tag |
| JP5982833B2 (en) * | 2012-01-20 | 2016-08-31 | セイコーエプソン株式会社 | Display device and electronic device |
| CN107331354B (en) * | 2017-08-10 | 2019-09-03 | 上海中航光电子有限公司 | Electrophoretic display panel and its driving method and display device |
| CN108877623B (en) * | 2018-07-02 | 2021-07-09 | 上海中航光电子有限公司 | Array substrate, electrophoresis display panel, driving method of electrophoresis display panel and display device |
| CN108806582B (en) * | 2018-07-02 | 2021-06-18 | 上海中航光电子有限公司 | Array substrate, electronic paper type display panel, driving method of electronic paper type display panel and display device |
| CN108962153B (en) * | 2018-07-19 | 2020-03-31 | 电子科技大学中山学院 | Method for eliminating edge residual shadow of electrophoretic electronic paper |
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