CN114236921A - Liquid crystal display panel, pre-charging method and liquid crystal display device - Google Patents
Liquid crystal display panel, pre-charging method and liquid crystal display device Download PDFInfo
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- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136286—Wiring, e.g. gate line, drain line
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- G—PHYSICS
- G02—OPTICS
- G02F—OPTICAL DEVICES OR ARRANGEMENTS FOR THE CONTROL OF LIGHT BY MODIFICATION OF THE OPTICAL PROPERTIES OF THE MEDIA OF THE ELEMENTS INVOLVED THEREIN; NON-LINEAR OPTICS; FREQUENCY-CHANGING OF LIGHT; OPTICAL LOGIC ELEMENTS; OPTICAL ANALOGUE/DIGITAL CONVERTERS
- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/136213—Storage capacitors associated with the pixel electrode
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- G02F1/00—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics
- G02F1/01—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour
- G02F1/13—Devices or arrangements for the control of the intensity, colour, phase, polarisation or direction of light arriving from an independent light source, e.g. switching, gating or modulating; Non-linear optics for the control of the intensity, phase, polarisation or colour based on liquid crystals, e.g. single liquid crystal display cells
- G02F1/133—Constructional arrangements; Operation of liquid crystal cells; Circuit arrangements
- G02F1/136—Liquid crystal cells structurally associated with a semi-conducting layer or substrate, e.g. cells forming part of an integrated circuit
- G02F1/1362—Active matrix addressed cells
- G02F1/1368—Active matrix addressed cells in which the switching element is a three-electrode device
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- 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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Abstract
The application discloses a liquid crystal display panel, a pre-charging method and a liquid crystal display device. The liquid crystal display panel comprises N scanning lines, M data lines and N × M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one pixel point in the M pixel points which are connected with any scanning line before the scanning line; when the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; when the scanning line outputs high level voltage, each pixel point starts to be charged normally. According to the scheme, the pixels can be pre-charged before the pixels are normally charged, so that the voltage of the pixel capacitor is more saturated, and the display image quality is more practical.
Description
Technical Field
The present disclosure relates to the field of liquid crystal display technologies, and in particular, to a liquid crystal display panel, a pre-charging method, and a liquid crystal display device.
Background
With the development of the liquid crystal panel industry, the liquid crystal panel gradually develops to a higher resolution and a larger size. However, as the resolution of the liquid crystal panel is higher and larger, and particularly, the number of rows in the vertical direction is larger and larger, the time allocated to each row of pixels of the liquid crystal panel is shorter and shorter, that is, the charging time allocated to each pixel is shorter and shorter. Therefore, the conventional liquid crystal display panel has a situation that the pixels in the panel are insufficiently charged, so that the display effect of the liquid crystal display panel is poor.
Content of application
In order to solve the technical problem of poor display effect caused by insufficient pixel charging, embodiments of the present application provide a liquid crystal display panel, a pre-charging method, and a liquid crystal display device.
The technical scheme of the embodiment of the application is realized as follows:
the embodiment of the application provides a liquid crystal display panel, liquid crystal display panel includes:
n scanning lines, M data lines and N M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively.
In the above scheme, the first pixel point is a pixel point, of which any one of M pixel points connected to the last scanning line of the scanning lines has the same polarity as that of each pixel point.
In the above scheme, each pixel point includes a first active element, a second active element, a liquid crystal capacitor, and a storage capacitor, a gate of the first active element is correspondingly connected to one of the N scan lines, any one of a source and a drain of the first active element is correspondingly connected to one of the M data lines, and the other one of the source and the drain of the first active element is further connected to a pixel electrode of the liquid crystal capacitor and a pixel electrode of the storage capacitor; the gate of the second active element is connected to the scan line to which the first pixel is connected, any one of the source and the drain of the second active element is further connected to the data line to which the first pixel is connected, and the other one of the source and the drain of the second active element is further connected to the pixel electrode of the liquid crystal capacitor and the pixel electrode of the storage capacitor.
In the above scheme, the first active device includes a Thin Film Transistor (TFT) or a Metal-Oxide-Semiconductor Field-Effect Transistor (MOSFET).
In the above scheme, the second active element includes a TFT or a MOSFET.
The embodiment of the present application further provides a pre-charging method based on any one of the above liquid crystal display panels, where the pre-charging method includes: when the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally.
In the foregoing solution, when the first pixel point is a pixel point having the same polarity as that of each pixel point in any one of M pixel points connected to a previous scan line of the scan line, the precharge method includes: when the previous scanning line outputs high-level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally.
In the above scheme, each pixel point includes a first active element, a second active element, a liquid crystal capacitor, and a storage capacitor, a gate of the first active element is correspondingly connected to one of the N scan lines, any one of a source and a drain of the first active element is correspondingly connected to one of the M data lines, and the other one of the source and the drain of the first active element is further connected to a pixel electrode of the liquid crystal capacitor and a pixel electrode of the storage capacitor; a gate of the second active device is connected to the scan line to which the first pixel is connected, any one of a source and a drain of the second active device is further connected to the data line to which the first pixel is connected, and the other of the source and the drain of the second active device is further connected to the pixel electrode of the liquid crystal capacitor and the pixel electrode of the storage capacitor; the pre-charging method comprises the following steps: when the scanning line connected with the first pixel point outputs high level voltage, the second active element is conducted, and the data line connected with the first pixel point starts to precharge the liquid crystal capacitor and the storage capacitor; when one of the N scanning lines outputs a high-level voltage, the first active element is conducted, and one of the M data lines starts to normally charge the liquid crystal capacitor and the storage capacitor.
In the above scheme, the first active element and the second active element include a TFT or a MOSFET.
The embodiment of the application also provides a liquid crystal display device which comprises a backlight module and the liquid crystal display panel.
According to the liquid crystal display panel, the pre-charging method and the liquid crystal display device, the liquid crystal display panel comprises N scanning lines, M data lines and N × M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively. The pre-charging method comprises the following steps: when the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally. By adopting the scheme provided by the application, the pixels can be pre-charged before the pixels are normally charged, so that the voltage of the pixel capacitor is more saturated, and the display image quality is more practical.
Drawings
FIG. 1 is a schematic diagram of a liquid crystal display panel in an exemplary technique;
FIG. 2 is a simplified schematic diagram of a pixel site in an exemplary technique;
FIG. 3 is a schematic diagram of pixel polarity in a dot inversion scheme according to an exemplary technique;
FIG. 4 is a schematic view illustrating a connection structure of a liquid crystal display panel according to an embodiment of the present disclosure;
FIG. 5 is a schematic view of another exemplary LCD panel according to the present disclosure;
FIG. 6 is a schematic diagram illustrating a comparison of exemplary techniques and connection structures of pixel points according to embodiments of the present disclosure;
fig. 7 is a schematic diagram illustrating comparison of two charging effects of an exemplary technique and an embodiment of the present application.
Detailed Description
In order to more clearly explain technical solutions in the embodiments or exemplary techniques of the present application, specific embodiments of the present application will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the present application, and that for a person skilled in the art, other drawings and other embodiments can be obtained from these drawings without inventive effort.
For the sake of simplicity, the drawings only show schematically the parts relevant to the present application, and they do not represent the actual structure as a product. In addition, in order to make the drawings concise and understandable, components having the same structure or function in some of the drawings are only schematically depicted, or only one of them is labeled. In this document, "one" means not only "one but also" a plurality of one ".
The present application will be described in further detail with reference to the accompanying drawings and examples.
Before the present application is described, a connection structure of a liquid crystal display panel and a basic composition of a pixel in an exemplary technique will be described.
As shown in fig. 1, fig. 1 is a schematic structural diagram of a liquid crystal display panel in an exemplary technology. In the figure, a plurality of scan lines (also called Gate lines, Gn-1, Gn +1 in the figure) and a plurality of data lines (Sm-1, Sm +1 in the figure) intersect with each other to define a plurality of pixels. Each pixel point is respectively connected with a corresponding scanning line and a corresponding data line. Referring to fig. 2, fig. 2 is a simplified schematic diagram of a pixel. One pixel includes a control switch T, a liquid crystal capacitor Clc, and a storage capacitor Cst. And the pixel point is also connected with a scanning line S responsible for transmitting a switching signal and a data line G responsible for transmitting data. When the scan line S connected to the pixel point is turned on, that is, when the scan line S inputs a high level voltage, the control switch T in the pixel point is turned on, a voltage signal on the data line G connected to the pixel point is input to the pixel electrode of the pixel, and a corresponding amount of charge is stored in the liquid crystal capacitor Clc and the storage capacitor Cst (one end of the liquid crystal capacitor Clc and the storage capacitor Cst is the pixel electrode, the other end is the common electrode VCOM, and the control switch T is connected to the pixel electrode of the liquid crystal capacitor Clc and the storage capacitor Cst).
Continuing with fig. 1, when the liquid crystal display panel is driven, the scanning lines in the liquid crystal display panel are opened line by line (in fig. 1, Gn-1 is first opened, then Gn-1 is closed, Gn is opened, then Gn is closed, Gn +1 is opened, and so on), when a certain row of scanning lines is opened, the control switches T of all the pixels connected with the row of scanning lines are opened, and all the pixels in the row are charged.
In an exemplary technique, a pixel only includes a control switch T, and only when a scan line connected to the control switch T outputs a high level voltage, a data line connected to the pixel charges the pixel. Therefore, the pixel of the lcd panel of the exemplary technology will be charged only once in a charging time. And because the liquid crystal display panel size is bigger and bigger, and the charge time is shorter and shorter, lead to the pixel in the liquid crystal display panel of exemplary technique can not charge enough, the display effect is not good.
Based on this, the embodiment of the present application provides a liquid crystal display panel, which includes:
n scanning lines, M data lines and N M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively.
In practical application, because the charging and discharging of the liquid crystal display panel are carried out through the capacitor structure, in the process of carrying out the charging and discharging by using alternating current, the voltage value loaded by the pixel electrode of each pixel point is different at the same moment, and compared with the voltage of the common electrode, the corresponding polarity of each pixel point is also different. When the voltage of the pixel electrode is higher than that of the common electrode, the pixel point at the moment is the anode, and when the voltage of the pixel electrode is lower than that of the common electrode, the pixel point at the moment is the cathode.
Referring to fig. 3, fig. 3 is a schematic diagram of pixel polarity in a conventional dot inversion method. In the figure, the polarities of the pixels are alternately arranged in "positive", "negative", "positive", and "negative".
In this embodiment, compared with the liquid crystal display panel structure of the exemplary technology, each pixel point is connected to the original scan line and data line, and is also connected to the scan line and data line connected to the pixel point having the same polarity as the pixel point, that is, connected to the first pixel point. Therefore, when the scanning line connected with the pixel point with the same polarity as the pixel point is opened, the pixel point can be precharged for one time, and when the scanning line originally connected with the pixel point is opened, the pixel point can be normally charged for one time. Because each pixel point is charged twice, the charging time is longer, so that each pixel point can be sufficiently charged, and the display effect of the liquid crystal display panel is better.
For example, in fig. 3, when the scanning lines are sequentially opened from top to bottom, the third row of the first pixel points may be connected to the scanning line and the data line connected to the first row of the third pixel points, or may be connected to the scanning line and the data line connected to the second row of the second pixel points. Because when the first row scanning line was opened, perhaps when the second row scanning line was opened, the first pixel of third row can carry out a precharge, and when the third row scanning line was opened, the first pixel of third row can carry out a normal charging once more, consequently, the first pixel of third row can charge twice, and the charge time is longer, charges more fully, and the display effect is more excellent.
In addition, in order to avoid that the interval duration between two charging times of each pixel point is too long, further, in an embodiment, the first pixel point is a pixel point, of which any one of M pixel points connected to the last scanning line of the scanning line has the same polarity as that of each pixel point.
Because each pixel point is connected with the original scanning line and data line, and also connected with any one of the scanning lines and the data lines connected with the pixel point with the same polarity as the pixel point connected with the previous scanning line. Therefore, the pixel point can be precharged once when the last scanning line is opened, and when the scanning line is opened, normal charging is carried out again, and the time interval of charging twice is short, so that the problem of abnormal display caused by long charging time interval can be avoided, and the normal display of the liquid crystal display panel is ensured.
Further, in an embodiment, each pixel point includes a first active device, a second active device, a liquid crystal capacitor, and a storage capacitor, a gate of the first active device is correspondingly connected to one of the N scan lines, any one of a source and a drain of the first active device is correspondingly connected to one of the M data lines, and the other one of the source and the drain of the first active device is further connected to a pixel electrode of the liquid crystal capacitor and a pixel electrode of the storage capacitor; the gate of the second active element is connected to the scan line to which the first pixel is connected, any one of the source and the drain of the second active element is further connected to the data line to which the first pixel is connected, and the other one of the source and the drain of the second active element is further connected to the pixel electrode of the liquid crystal capacitor and the pixel electrode of the storage capacitor.
Here, the first active element includes a TFT or a MOSFET. The second active element comprises a TFT or a MOSFET.
In this embodiment, on the basis of the existing pixel structure, a second active device is added to connect the scan line and the data line connected to the first pixel, so that when the scan line connected to the first pixel is opened, the second active device is opened, the pixel can be precharged for the first time, and when the original scan line connected to the first active device is opened, and the pixel can be normally charged for the second time. Because the pixel points are charged twice, the charging time is longer, so that each pixel point can be sufficiently charged, and the display effect of the liquid crystal display panel is better.
A specific embodiment will be described below to explain the technical solution of the present application in detail.
Specifically, the present embodiment provides a liquid crystal display panel structure based on the dot inversion structure shown in fig. 3, and based on the liquid crystal display panel structure, the charging time of each pixel point can be increased to twice that of the original charging time, so that the pixel capacitor voltage is more saturated, and the displayed image is clear.
In the dot inversion structure shown in fig. 3, because the polarities of the oblique-angle pixels are the same, a liquid crystal display panel structure is proposed, as shown in fig. 4 and 5, fig. 4 is to sequentially open each row of scanning lines from top to bottom, fig. 5 is to sequentially open each row of scanning lines from bottom to top, in fig. 4 and 5, each pixel is added with a TFT on the basis of the original pixel structure, the TFT is connected with the previous scanning line of the original scanning line and the next data line of the original data line, the charging time of each pixel is changed into the time length of two rows, and the same pixel is charged with electricity of the same polarity 2 times in the time, so that the pixel is sufficiently charged, and the pixel capacitor voltage is saturated.
Specifically, referring to fig. 6, the upper two pixel points in fig. 6 are schematic pixel structures in an exemplary technique, and the lower one pixel point in fig. 6 is a schematic pixel structure in this embodiment. For convenience of comparison, the pixel structure in the exemplary technique and the pixel structure in the present embodiment are placed in the same figure for illustration.
In the pixel structure of the exemplary technology, i.e., the pixel structure of the upper two pixel points in fig. 6, a pixel point includes only one TFT switch, and the TFT switch connects a pixel electrode with a corresponding one of the scan lines and a corresponding one of the data lines. When the scanning line is opened, the pixel point obtains charges from the connected data line for charging. In the pixel structure in this embodiment, that is, the pixel structure of the lower pixel point in fig. 6, a TFT switch TFT T3 is added on the basis of the pixel structures of the upper two pixel points, and the TFT T3 connects the pixel electrode with the previous scan line G1 and the next data line S2. When the direction that the scanning line was opened is from the top down in proper order, when G1 opened, TFT T3 opened, and data line S2 carries out the precharge to this pixel, and when G2 opened, the original TFT T1 of this pixel opened, and data line S1 carries out normal charge to this pixel.
Since the pixel point is precharged once, when the pixel point is normally charged, the difference between the starting point of the pixel electrode voltage of the pixel point and the target voltage is lower than the difference between the starting point of the pixel electrode voltage of the pixel point and the target voltage when the pixel point is normally charged in the exemplary technology, and therefore, the pixel point in this embodiment can reach the target voltage more easily.
See, in particular, fig. 7. Fig. 7 is a schematic diagram illustrating comparison of two charging effects of an exemplary technique and an embodiment of the present application. In the figure, Tf represents the charging duration of one frame, and represents the time required for sequentially charging the pixels in each row and completing one round of normal charging of all the pixels; th is a charging time of one line, which represents a time required for one line of pixel points to complete normal charging. When the liquid crystal display panel has N rows, Tf is N Th. In fig. 7, since the exemplary technique performs charging only once, the pixel electrode voltage of the original pixel changes only once per frame charging time, i.e., directly from V1 to V2, or from V2 to V3, or from V3 to V4, or from V4 to V5, or from V5 to V6.
In fig. 7, since the pixel structure of this embodiment can be charged twice, the pixel electrode voltage changes twice during each frame of charging time. That is, the pixel electrode voltage is changed from V1 to VCOM first in the previous charging period, then from VCOM to V2 in the current charging period, or from V2 to VCOM first in the previous charging period, then from VCOM to V3 in the current charging period, or from V3 to VCOM in the previous charging period, then from VCOM to V4 in the current charging period, or from V4 to VCOM first in the previous charging period, then from VCOM to V5 in the current charging period, or from V5 to VCOM in the previous charging period, and then from m to V6 in the current charging period.
As can be seen from the above description, since the voltage change of the exemplary technology is changed only once, and the voltage change of the present application is changed twice, that is, the voltage change amount of the present application is smaller than the voltage change amount of the exemplary technology during the normal charging time, the pixel structure of the present application can ensure that the pixel can be charged sufficiently when the charging time is reduced, and the pixel cannot be charged insufficiently.
The embodiment pre-charges the pixel to make the pixel capacitor voltage more saturated, so that the display image quality is more practical.
In the liquid crystal display panel provided by the embodiment of the application, the liquid crystal display panel comprises N scanning lines, M data lines and N × M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively. When the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally. By adopting the scheme provided by the application, the pixels can be pre-charged before the pixels are normally charged, so that the voltage of the pixel capacitor is more saturated, and the display image quality is more practical.
The embodiment of the present application further provides a pre-charging method for a liquid crystal display panel, where the liquid crystal display panel includes: n scanning lines, M data lines and N M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively; the pre-charging method comprises the following steps: when the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally.
In an embodiment, when the first pixel point is a pixel point having the same polarity as that of any one of M pixel points connected to a previous scan line of the scan lines, the pre-charging method includes: when the previous scanning line outputs high-level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally.
In an embodiment, each pixel point includes a first active element, a second active element, a liquid crystal capacitor, and a storage capacitor, a gate of the first active element is correspondingly connected to one of the N scan lines, any one of a source and a drain of the first active element is correspondingly connected to one of the M data lines, and the other one of the source and the drain of the first active element is further connected to a pixel electrode of the liquid crystal capacitor and a pixel electrode of the storage capacitor; a gate of the second active device is connected to the scan line to which the first pixel is connected, any one of a source and a drain of the second active device is further connected to the data line to which the first pixel is connected, and the other of the source and the drain of the second active device is further connected to the pixel electrode of the liquid crystal capacitor and the pixel electrode of the storage capacitor; the pre-charging method comprises the following steps: when the scanning line connected with the first pixel point outputs high level voltage, the second active element is conducted, and the data line connected with the first pixel point starts to precharge the liquid crystal capacitor and the storage capacitor; when one of the N scanning lines outputs a high-level voltage, the first active element is conducted, and one of the M data lines starts to normally charge the liquid crystal capacitor and the storage capacitor.
In one embodiment, the first active device and the second active device include a thin film transistor or a metal-oxide semiconductor field effect transistor.
Specifically, the precharge method of the present application and the liquid crystal display panel embodiment belong to the same concept, and the specific implementation process of the precharge method can be seen in the liquid crystal display panel embodiment, which is not described herein again.
The embodiment of the application provides a pre-charging method of a liquid crystal display panel, wherein the liquid crystal display panel comprises N scanning lines, M data lines and N × M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively. The pre-charging method comprises the following steps: when the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally. By adopting the scheme provided by the application, the pixels can be pre-charged before the pixels are normally charged, so that the voltage of the pixel capacitor is more saturated, and the display image quality is more practical.
The embodiment of the application also provides a liquid crystal display device which comprises a backlight module and the liquid crystal display panel in any one of the embodiments.
It should also be noted that the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus 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 apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in the process, method, article, or apparatus that comprises the element.
The above are merely examples of the present application and are not intended to limit the present application. Various modifications and changes may occur to those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application should be included in the scope of the claims of the present application.
Claims (10)
1. A liquid crystal display panel comprises N scanning lines, M data lines and N x M pixel points; each scanning line in the N scanning lines is connected with M pixel points, and each pixel point in the M pixel points is also correspondingly connected with one data line in the M data lines; characterized in that, the liquid crystal display panel further comprises:
each pixel point in the M pixel points is also connected with a scanning line and a data line which are connected with a first pixel point, and the first pixel point is a pixel point which has the same polarity as that of any one of the M pixel points connected with any scanning line before the scanning line; wherein N and M are natural numbers greater than 1 respectively.
2. The liquid crystal display panel according to claim 1, wherein the first pixel point is a pixel point having the same polarity as each of the M pixel points connected to the previous scan line of the scan lines.
3. The liquid crystal display panel according to any one of claims 1 to 2, wherein each pixel point includes a first active element, a second active element, a liquid crystal capacitor, and a storage capacitor, a gate of the first active element is connected to one of the N scanning lines, any one of a source and a drain of the first active element is connected to one of the M data lines, and the other of the source and the drain of the first active element is further connected to a pixel electrode of the liquid crystal capacitor and a pixel electrode of the storage capacitor; the gate of the second active element is connected to the scan line to which the first pixel is connected, any one of the source and the drain of the second active element is further connected to the data line to which the first pixel is connected, and the other one of the source and the drain of the second active element is further connected to the pixel electrode of the liquid crystal capacitor and the pixel electrode of the storage capacitor.
4. The liquid crystal display panel of claim 3, wherein the first active device comprises a thin film field effect transistor or a metal-oxide semiconductor field effect transistor.
5. The LCD panel of claim 3, wherein the second active device comprises a TFT or a MOSFET.
6. A precharge method of a liquid crystal display panel according to any one of claims 1 to 5, characterized in that the precharge method comprises: when the scanning line connected with the first pixel point outputs high level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally.
7. The method according to claim 6, wherein when the first pixel point is any one of M pixel points connected to a previous scan line of the scan lines, and the polarity of each pixel point is the same, the method comprises: when the previous scanning line outputs high-level voltage, each pixel point starts to be precharged; and when the scanning line outputs high level voltage, each pixel point starts to be charged normally.
8. The pre-charging method according to any one of claims 6 to 7, wherein each pixel point includes a first active device, a second active device, a liquid crystal capacitor, and a storage capacitor, a gate of the first active device is correspondingly connected to one of the N scan lines, any one of a source and a drain of the first active device is correspondingly connected to one of the M data lines, and the other one of the source and the drain of the first active device is further connected to a pixel electrode of the liquid crystal capacitor and a pixel electrode of the storage capacitor; a gate of the second active device is connected to the scan line to which the first pixel is connected, any one of a source and a drain of the second active device is further connected to the data line to which the first pixel is connected, and the other of the source and the drain of the second active device is further connected to the pixel electrode of the liquid crystal capacitor and the pixel electrode of the storage capacitor; the pre-charging method comprises the following steps: when the scanning line connected with the first pixel point outputs high level voltage, the second active element is conducted, and the data line connected with the first pixel point starts to precharge the liquid crystal capacitor and the storage capacitor; when one of the N scanning lines outputs a high-level voltage, the first active element is conducted, and one of the M data lines starts to normally charge the liquid crystal capacitor and the storage capacitor.
9. The method of claim 8, wherein the first active device and the second active device comprise thin film field effect transistors or metal-oxide semiconductor field effect transistors.
10. A liquid crystal display device, characterized in that the liquid crystal display device comprises a backlight module and the liquid crystal display panel of any one of claims 1 to 5.
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