CN109584822B - Display panel driving method and display device - Google Patents
Display panel driving method and display device Download PDFInfo
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- CN109584822B CN109584822B CN201811557339.6A CN201811557339A CN109584822B CN 109584822 B CN109584822 B CN 109584822B CN 201811557339 A CN201811557339 A CN 201811557339A CN 109584822 B CN109584822 B CN 109584822B
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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
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
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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
- G02F1/136209—Light shielding layers, e.g. black matrix, incorporated in the active matrix substrate, e.g. structurally associated with the switching element
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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
- G09G3/22—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 using controlled light sources
- G09G3/30—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 using controlled light sources using electroluminescent panels
- G09G3/32—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—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 using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3275—Details of drivers for data electrodes
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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
- G09G3/3685—Details of drivers for data electrodes
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/06—Details of flat display driving waveforms
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Abstract
The application relates to a display device, which comprises a display panel, a scanning signal driving module and a data signal driving module; the display panel comprises a scanning line, a plurality of data lines, a pixel unit and a black matrix; the scanning lines comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit; the scanning signal driving module is used for simultaneously inputting scanning pulse signals to a scanning line connected with the Nth pixel unit and a scanning line connected with the (N + 4) th pixel unit; the data signal driving module is used for inputting square wave data signals to the data lines so as to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve vertical bright and dark lines on the display panel.
Description
Technical Field
The present disclosure relates to the field of display technologies, and in particular, to a driving method of a display panel and a display device.
Background
The existing liquid crystal display device generally has three driving structures: a standard rate driving type, a double rate driving type, and a triple rate driving type. When the resolution of the display device is 1366 × 768, 4098 data lines and 768 scan lines are in the standard rate driving type; 2049 data lines of double-rate driving type and 1536 scanning lines; the triple rate driving type has 1366 data lines and 2304 scan lines.
When the data signal charges the pixels of the display panel through the data line, due to the impedance, the charging time of the data signal to the adjacent pixels is different, so that the charging rate of partial pixels is insufficient, and the display panel has vertical bright and dark lines.
Disclosure of Invention
Accordingly, it is necessary to provide a driving method of a display panel and a display device, which are directed to the problems that the charging rate of some pixels is insufficient due to the difference of the arrival time of the data signal at the adjacent pixels, and the vertical bright and dark lines appear on the display panel.
A display device comprises a display panel, a scanning signal driving module and a data signal driving module; the display panel comprises a scanning line, a plurality of data lines, a plurality of pixel units and a black matrix; the scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; a plurality of data lines are arranged along the column direction; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix manner, each two adjacent rows of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units sharing one data line are sequenced according to a preset sequence; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit; the scanning signal driving module is used for simultaneously inputting scanning pulse signals to a scanning line connected with the Nth pixel unit and a scanning line connected with the (N + 4) th pixel unit, wherein N and N are integers which are more than or equal to 1; the data signal driving module is used for inputting square wave data signals to the data lines so as to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve vertical bright and dark lines on the display panel; wherein the polarity of the square wave data signal is inverted every 2n scan pulses.
In one embodiment, the charging time of the (N + 4) th pixel unit is 2 scan pulses in one frame.
In one embodiment, the display device further comprises a timing controller, wherein the timing controller is used for controlling the polarity of the square wave data signals to be inverted every 2n scanning pulses and controlling the polarities of the square wave data signals on two adjacent data lines to be opposite at the same time.
In one embodiment, the pixel units of the same row spaced from each other by one pixel unit are connected to the same scanning line or different scanning lines.
In one embodiment, the display panel further includes an active array switch, each pixel unit is connected to a drain of the active array switch, a gate of the active array switch is connected to the scan line, and a source of the active array switch is connected to the data line.
A display device comprises a display panel, a scanning signal driving module, a data signal driving module and a time schedule controller; the display panel comprises a scanning line, a plurality of data lines, a plurality of pixel units and a black matrix; the scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; a plurality of data lines are arranged along the column direction; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix manner, each two adjacent rows of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units sharing one data line are sequenced according to a preset sequence; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit; the scanning signal driving module is used for simultaneously inputting scanning pulse signals to a scanning line connected with the Nth pixel unit and a scanning line connected with the (N + 4) th pixel unit, wherein N and N are integers which are more than or equal to 1; the data signal driving module is used for inputting square wave data signals to the data lines so as to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve vertical bright and dark lines on the display panel; the time sequence controller is used for controlling the polarity of the square wave data signals to be inverted once after every 2n scanning pulses and controlling the polarities of the square wave data signals on two adjacent data lines to be opposite at the same moment.
A driving method of a display panel comprises a scanning line, a plurality of data lines, a plurality of pixel units and a black matrix; the scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; a plurality of data lines are arranged along the column direction; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix manner, each two adjacent rows of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units sharing one data line are sequenced according to a preset sequence; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit, and n is an integer greater than or equal to 1; the driving method of the display panel includes the steps of:
simultaneously inputting scanning pulse signals to a scanning line connected with an Nth pixel unit and a scanning line connected with an (N + 4) th pixel unit, wherein N is an integer greater than or equal to 1;
inputting square wave data signals to the data lines to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line so as to improve vertical bright and dark lines on the display panel;
the polarity of the square wave data signal is inverted every 2n scan pulses.
In one embodiment, the charging time of the (N + 4) th pixel unit is 2 scan pulses in one frame.
In one embodiment, the square wave data signals on two adjacent data lines have opposite polarities at the same time.
In one embodiment, the pixel units in the same row spaced from each other by one pixel unit are connected with the same scanning line or different scanning lines
The display device and the driving method of the display panel charge the Nth pixel unit sharing one data line and also pre-charge the (N + 4) th pixel unit, thereby increasing the charging time of the pixel unit, improving the vertical bright and dark lines of the display panel, and arranging the black matrix on the surface of the pixel unit between the front 2N pairs of scanning lines of the display panel to shield the light emission of the front 2N rows of pixel units of the display panel, so that the whole display brightness of the display panel is consistent.
Drawings
FIG. 1 is a schematic diagram of a pixel cell array of a display panel according to an embodiment;
FIG. 2 is a driving waveform diagram of a data square wave signal and a scan signal of an embodiment;
FIG. 3 is a polarity diagram of each pixel unit shown in FIG. 1 in a frame;
FIG. 4 illustrates the light and dark effects of the pixel cells shown in FIG. 1;
FIG. 5 is a schematic view of a display device according to an embodiment;
FIG. 6 is a schematic diagram of a pixel cell array of a display panel according to another embodiment;
FIG. 7 is a driving waveform diagram of a square wave data signal of an embodiment;
FIG. 8 is a flowchart illustrating a driving method of a display panel according to an embodiment.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
In the present application, the display panel may be, for example, a TFT-LCD (Thin Film Transistor Liquid Crystal display) display panel, an OLED (Organic Light-Emitting Diode) display panel, a QLED (Quantum Dot Light Emitting Diode) display panel, a curved display panel, or other display panels.
In order to make the technical solution adopted by the present application to improve the vertical bright and dark lines of the display panel clearer, the following description will take a driving method in which the double-rate driving type display panel adopts 1+2 lines as an example to explain the principle of generating the vertical bright and dark lines of the display panel.
Referring to fig. 1, fig. 1 is a schematic diagram of a pixel array of a double-rate driving type display panel, in which G1, G2, G3, a.so., G1536 are scan lines arranged in a row direction, G1 and G2 constitute a pair of scan lines, G3 and G4 constitute a pair of scan lines, and so on, G1535 and G1536 constitute a pair of scan lines, and D1, D2, D3, a.so., D2049 are data lines arranged in a column direction. The pixel units are arranged between each pair of scanning lines and are arranged in a matrix, and the positions of the pixel units are represented by Pxy, wherein x represents an x-th row, and y represents a y-th column. Every two adjacent columns of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units in the same row, which are separated from each other by one pixel unit, are connected with the same scanning line.
The driving sequence of the scan lines is from top to bottom, i.e., from G1, G2, G3,.., to G1536, and the driving sequence of the data lines is from left to right, i.e., from D1, D2, D3,., to D2049. During scanning, a scanning pulse signal is input into the scanning line and is applied to an active array switch of the pixel unit connected with the scanning line, the active array switch is turned on, a square wave data signal input into the data line connected with the active array switch is received, and the square wave data signal charges the pixel unit. In fig. 1, odd-numbered rows of pixel units are connected to odd-numbered scanning lines, and even-numbered rows of pixel units are connected to even-numbered scanning lines. Taking the scanning lines G1 and G2 and the data lines D1 and D2 as an example, when the scanning line G1 is scanned, the pixel units P11 and P13 receive the square wave data signals input by the data lines D1 and D2, respectively; when scanning the scan line G2, the pixel cells P12 and P14 respectively receive the square wave data signals inputted from the data lines D1 and D2.
Referring to fig. 2 and 3, when the polarity of the square wave data signal is inverted every 2 scan pulses, the transmission waveform of the square wave data signal on the data line is not an ideal square wave in practice due to the impedance, but there is a delay when the polarity changes. When the scanning pulse signals are sequentially input to the scanning lines, the square wave data signals input to the data lines sequentially charge the pixel units. Taking the square wave data signal inputted from the data line D1 as an example, the square wave data signal inputted from the data line D1 charges the pixel cells P11, P12, P21, P22, P31, P32, · P7681, and P7682 in turn, since there is a voltage polarity inversion when the square wave data signals are charged from the pixel unit P11 to the pixel unit P12, the pixel unit P21 to the pixel unit P22, the pixel unit P7681 to the pixel unit P7682, the charging time is short, therefore, the even-column pixel units (P12, P22, P32, P7682) have low brightness, no voltage polarity inversion exists when charging is carried out from the pixel unit P12 to the pixel unit P21, from the pixel unit P22 to the pixel unit P31, p.the pixel unit P7672 to the pixel unit P7681, therefore, the odd-numbered columns of pixel units (P11, P21, P31,. and P7681) have brighter brightness, so that the display of the display panel has vertical bright and dark lines. Fig. 4 is a diagram showing the effect of bright and dark lines displayed on the display panel, where L represents bright and a represents dark.
Referring to fig. 5, fig. 5 is a schematic view of a display device according to the present application. The display device includes a display panel 10, a scan signal driving module 20, and a data signal driving module 30.
Referring to fig. 6, the display panel 10 includes scan lines, a plurality of data lines, a plurality of pixel units, and a black matrix 11.
The scanning lines are arranged in a row direction. The scanning lines comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines. The data lines are arranged along the column direction. The pixel units are arranged between each pair of scanning lines and are arranged in a matrix. Every two adjacent columns of pixel units share one data line, and the pixel units sharing one data line in the same row are connected with different scanning lines. The pixel units sharing one data line are sorted in a preset order. Wherein n is an integer greater than or equal to 1. The 2n pairs of first scanning lines are arranged on one side of the plurality of pairs of second scanning lines.
The black matrix 11 is disposed on a surface of the pixel unit between each pair of the first scan lines to block light emission of the pixel unit.
The pixel units in the same row, which are separated from each other by one pixel unit, may be connected to the same scanning line, or may be connected to different scanning lines.
In an embodiment, the predetermined sequence is that two pixel units sharing the same row of a data line are sequentially ordered according to a first direction, every two adjacent rows of pixel units sharing the data line are sequentially ordered according to a second direction, a row of pixel units near one end of the data line is taken as a first row, and a pixel unit sharing the data line takes a first row of first-ordered pixel units as a first pixel unit.
The scanning order of the scanning lines is the order of arrangement of the pixel units connected to the scanning lines and sharing one data line, and fig. 6 illustrates the first scanning line as 2.
For the pixel units in the same row, the pixel units on both sides of the data line are sequentially driven, and the pixel units can be odd-numbered columns of pixel units on one side of the data line and then even-numbered columns of pixel units on the other side of the data line, or even-numbered columns of pixel units on one side of the data line and then odd-numbered columns of pixel units on the other side of the data line. When the odd-numbered columns of pixel units on one side of the data line are driven first and the even-numbered columns of pixel units on the other side of the data line are driven again, the odd-numbered columns of pixel units are connected with the odd-numbered rows of scanning lines, the even-numbered columns of pixel units are connected with the even-numbered rows of scanning lines, the scanning sequence of the scanning lines is that the odd-numbered rows of scanning lines are scanned first and then the even-numbered rows of scanning lines are scanned, and each pair of scanning lines are scanned sequentially, at the moment, the first direction is from the left side to the right side, such as from the pixel unit P11 to the pixel unit P12, and the scanning sequence of the scanning lines is from G1 to G2. When the even-numbered pixel units on one side of the data line are driven first and the odd-numbered pixel units on the other side of the data line are driven again, the even-numbered pixel units are connected with the odd-numbered scanning lines, the odd-numbered pixel units are connected with the even-numbered scanning lines, the scanning sequence of the scanning lines is that the even-numbered scanning lines in a pair of scanning lines are scanned first and then the odd-numbered scanning lines in a pair of scanning lines are scanned, and each pair of scanning lines are scanned sequentially, wherein the first direction is from the right side to the left side, such as from the pixel unit P12 to the pixel unit P11, and the scanning sequence of the scanning lines is from G1 to G2.
The second direction is from the pixel unit sequenced from the previous row of pixel units to the pixel unit sequenced from the next row of pixel units. For example, when the first direction is from the left side to the right side, the second direction is from the pixel cell P12 of the first row to the pixel cell P21 of the second row.
Fig. 6 shows that odd-numbered columns of pixel units are connected to odd-numbered rows of scan lines, even-numbered columns of pixel units are connected to even-numbered rows of scan lines, pixel units of one pixel unit in the same row are connected to the same scan line, and the pixel units on both sides of the data line D1 are sequentially ordered as follows: the pixel unit P11 is a first pixel unit, the pixel unit P12 is a second pixel unit, the pixel unit P21 is a third pixel unit, the pixel unit P22 is a fourth pixel unit, and so on, the pixel unit Pm1 is a 2m-1 pixel unit, and the pixel unit Pm2 is a 2m pixel unit.
The scan signal driving module 20 is configured to simultaneously input a scan pulse signal to a scan line connected to an nth pixel unit and a scan line connected to an (N + 4) th pixel unit, where N is an integer greater than or equal to 1.
The display panel further comprises an active array switch K, each pixel unit is connected with the drain electrode of the active array switch, the grid electrode of the active array switch is connected with the scanning line, and the source electrode of the active array switch is connected with the data line.
When the scanning line connected with the Nth pixel unit and the scanning line connected with the (N + 4) th pixel unit simultaneously input scanning pulse signals, the active array switch connected with the Nth pixel unit and the active array switch connected with the (N + 4) th pixel unit are simultaneously turned on, and then square wave data signals transmitted by the corresponding data lines can be received.
The data signal driving module 30 is configured to input a square wave data signal to the data line to charge the nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve a vertical bright-dark line on the display panel 10, where a polarity of the square wave data signal is inverted every 2N scan pulses.
When a scanning pulse signal is input to a scanning line connected with the Nth pixel unit, a scanning pulse signal is simultaneously input to a scanning line connected with the (N + 4) th pixel unit, so that the (N + 4) th pixel unit is pre-charged when the (N + 4) th pixel unit is charged, and when the scanning line connected with the (N + 4) th pixel unit is scanned, the (N + 4) th pixel unit is charged again. Therefore, in one frame, all the pixel units (including the fifth pixel unit) after the fifth pixel unit sharing one data line can obtain sufficient charging time, the brightness is brighter, and the overall vertical bright and dark lines on the display panel 10 are improved. However, in one frame of picture, since the charging time of the first pixel unit, the second pixel unit, the third pixel unit and the fourth pixel unit sharing one data line is not pre-charged, the luminance of the pixel units in the first 2n rows on the display panel 10 is darker than the luminance of the pixel units in the second 2n +1 rows (including the 2n +1 rows), which affects the overall display effect of the picture.
In one frame, the charging time of the (N + 4) th pixel unit is 2 scan pulses.
The pixel cells on both sides of the data line D1 in fig. 6 will be described as an example. In one frame, when the first pixel cell P11 is charged, the fifth pixel cell P31 is simultaneously precharged, and when the fifth pixel cell P31 is charged, the ninth pixel cell P51 is simultaneously precharged, and thus, the charging time of the fifth pixel cell P31 is 2 scan pulses. When the second pixel cell P12 is charged, the sixth pixel cell P32 is simultaneously precharged, and when the sixth pixel cell P32 is charged, the tenth pixel cell P52 is simultaneously precharged, and thus, the charging time of the sixth pixel cell P32 is 2 scan pulses. The charging time of other pixel units and the like. Therefore, sufficient charging time can be obtained for the even-numbered columns of pixel cells (except for the second pixel cell P12 and the fourth pixel cell P22), the luminance of the even-numbered columns of pixel cells is close to that of the odd-numbered columns of pixel cells, and the bright and dark lines of the display panel 10 are improved.
However, since the first pixel unit P11, the second pixel unit P12, the third pixel unit P21 and the fourth pixel unit P22 are not pre-charged, the charging time of the first pixel unit P11, the second pixel unit P12, the third pixel unit P21 and the fourth pixel unit P22 is 1 scan pulse, and the brightness of the first pixel unit P11, the second pixel unit P12, the third pixel unit P21 and the fourth pixel unit P22 is dark.
The display panel 10 of the present application disposes the black matrix 11 on the surface of the pixel unit between the first 2n pairs of scanning lines of the display panel 10, that is, disposes the black matrix 11 on the surface of the pixel unit between each pair of first scanning lines. Due to the shielding effect of the black matrix 11, the light emission of the pixel units in the front 2n rows of the display panel 10 is shielded, so that the display brightness of the remaining pixel units of the display panel 10 has no obvious difference, the overall display brightness of the display panel 10 is consistent, and the overall display effect of the picture is improved.
The black matrix 11 material may include chromium or titanium, and may also include carbon black acryl.
The display device further includes a timing controller 40, wherein the timing controller 40 is configured to control the polarity of the square wave data signals to be inverted every 2n scan pulses and to control the square wave data signals on two adjacent data lines to be opposite in polarity at the same time, as shown in fig. 7, which is illustrated in fig. 7 by the square wave data signals on the data lines D1 to D5.
The display panel 10 may adopt a 1+2 line driving method, and may also adopt a 2 line driving method. The driving method of 1+2 lines and the driving method of 2 lines are both the driving method in which the polarity of the square wave data signal is inverted once by 2 scan pulses.
In one embodiment, the positive voltage of the square wave data signal is 7V and the negative voltage is-7V. In other embodiments, the positive voltage and the negative voltage of the square wave data signal can have other values.
To sum up, the display device of the present application also pre-charges the N +4N th pixel unit while charging the nth pixel unit sharing one data line, so as to increase the charging time of the pixel unit, thereby improving the vertical bright and dark lines of the display panel 10, and further disposing the black matrix 11 on the surface of the pixel unit between the front 2N pairs of scanning lines of the display panel 10, so as to block the light emission of the front 2N rows of pixel units of the display panel 10, so that the overall display brightness of the display panel 10 is uniform.
Please refer to fig. 8, which is a flowchart illustrating a driving method of a display panel according to a preferred embodiment of the present application. It should be noted that the method of the present application is not limited to the order of the following steps, and in other embodiments, the method of the present application may include only a part of the following steps, or a part of the steps may be deleted. In addition, in other embodiments, one step may be divided into a plurality of steps, or a plurality of steps may be combined into one step.
The display panel 10 includes a scan line, a plurality of data lines, a plurality of pixel units, and a black matrix. The scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines. The data lines are arranged along the column direction. The pixel units are arranged between each pair of scanning lines and are arranged in a matrix. Every two adjacent columns of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units sharing one data line are sequenced according to a preset sequence. The black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit, and n is an integer greater than or equal to 1.
The driving method of the display panel includes the steps of:
in step S1, a scan pulse signal is simultaneously input to a scan line connected to the nth pixel cell and a scan line connected to the (N + 4) th pixel cell, where N is an integer greater than or equal to 1.
In step S2, a square wave data signal is input to the data lines to charge the nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve the vertical bright and dark lines on the display panel 10.
In step S3, the polarity of the square wave data signal is inverted every 2n scan pulses.
The pixel units in the same row, which are separated from each other by one pixel unit, may be connected to the same scanning line, or may be connected to different scanning lines.
In an embodiment, the predetermined sequence is that two pixel units sharing the same row of a data line are sequentially ordered according to a first direction, every two adjacent rows of pixel units sharing the data line are sequentially ordered according to a second direction, a row of pixel units near one end of the data line is taken as a first row, and a pixel unit sharing the data line takes a first row of first-ordered pixel units as a first pixel unit.
It should be noted that, in the foregoing embodiment, the explanation of the display device is also applicable to the driving method of the display panel of the embodiment, and the implementation principle is similar, and is not described herein again.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express several embodiments of the present application, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the concept of the present application, which falls within the scope of protection of the present application. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (10)
1. A display device is characterized by comprising a display panel, a scanning signal driving module and a data signal driving module; the display panel comprises a scanning line, a plurality of data lines, a plurality of pixel units and a black matrix; the scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; a plurality of data lines are arranged along the column direction; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix manner, every two adjacent columns of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, the pixel units sharing one data line are sequenced according to a preset sequence, and the 2n pairs of first scanning lines are arranged on one side of the plurality of pairs of second scanning lines; the preset sequence is that two pixel units in the same row sharing one data line are sequentially sequenced according to a first direction, every two adjacent rows of pixel units sharing one data line are sequentially sequenced according to a second direction, one row of pixel units close to one end of the data line is taken as a first row, and the pixel unit sharing one data line takes the pixel unit sequenced in the first row as a first pixel unit; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit; the scanning signal driving module is used for simultaneously inputting scanning pulse signals to a scanning line connected with the Nth pixel unit and a scanning line connected with the (N + 4) th pixel unit, wherein N is an integer greater than or equal to 1, and N is an integer greater than 1; the data signal driving module is used for inputting square wave data signals to the data lines so as to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve vertical bright and dark lines on the display panel; wherein the polarity of the square wave data signal is inverted every 2n scan pulses.
2. The display device according to claim 1, wherein the charging time of the (N + 4) th pixel unit is 2 scan pulses in one frame.
3. The display device according to claim 1, further comprising a timing controller for controlling the polarity of the square wave data signals to be inverted every 2n scan pulses and for controlling the polarities of the square wave data signals on two adjacent data lines to be opposite at the same timing.
4. The display device according to claim 1, wherein the pixel cells of the same row spaced apart from each other by one pixel cell are connected to the same scanning line or connected to different scanning lines.
5. The display device according to claim 1, wherein the display panel further comprises an active array switch, each pixel unit is connected to a drain of the active array switch, a gate of the active array switch is connected to the scan line, and a source of the active array switch is connected to the data line.
6. A display device is characterized by comprising a display panel, a scanning signal driving module, a data signal driving module and a time sequence controller; the display panel comprises a scanning line, a plurality of data lines, a plurality of pixel units and a black matrix; the scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; a plurality of data lines are arranged along the column direction; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix manner, each two adjacent rows of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units sharing one data line are sequenced according to a preset sequence; the preset sequence is that two pixel units in the same row sharing one data line are sequentially sequenced according to a first direction, every two adjacent rows of pixel units sharing one data line are sequentially sequenced according to a second direction, one row of pixel units close to one end of the data line is taken as a first row, and the pixel unit sharing one data line takes the pixel unit sequenced in the first row as a first pixel unit; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit; the scanning signal driving module is used for simultaneously inputting scanning pulse signals to a scanning line connected with the Nth pixel unit and a scanning line connected with the (N + 4) th pixel unit, wherein N and N are integers which are more than or equal to 1; the data signal driving module is used for inputting square wave data signals to the data lines so as to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line, so as to improve vertical bright and dark lines on the display panel; the time sequence controller is used for controlling the polarity of the square wave data signals to be inverted once after every 2n scanning pulses and controlling the polarities of the square wave data signals on two adjacent data lines to be opposite at the same moment.
7. A driving method of a display panel comprises a scanning line, a plurality of data lines, a plurality of pixel units and a black matrix; the scanning lines are arranged along the row direction and comprise 2n pairs of first scanning lines and a plurality of pairs of second scanning lines; a plurality of data lines are arranged along the column direction; the pixel units are arranged between each pair of scanning lines and are arranged in a matrix manner, each two adjacent rows of pixel units share one data line, the pixel units sharing one data line in the same row are connected with different scanning lines, and the pixel units sharing one data line are sequenced according to a preset sequence; the preset sequence is that two pixel units in the same row sharing one data line are sequentially sequenced according to a first direction, every two adjacent rows of pixel units sharing one data line are sequentially sequenced according to a second direction, one row of pixel units close to one end of the data line is taken as a first row, and the pixel unit sharing one data line takes the pixel unit sequenced in the first row as a first pixel unit; the black matrix is arranged on the surface of the pixel unit between each pair of first scanning lines to shield the light emission of the pixel unit, and n is an integer greater than or equal to 1; the driving method of the display panel includes the steps of:
simultaneously inputting scanning pulse signals to a scanning line connected with an Nth pixel unit and a scanning line connected with an (N + 4) th pixel unit, wherein N is an integer greater than or equal to 1;
inputting square wave data signals to the data lines to charge the Nth pixel unit and the (N + 4) th pixel unit sharing one data line so as to improve vertical bright and dark lines on the display panel;
the polarity of the square wave data signal is inverted every 2n scan pulses.
8. The method of claim 7, wherein the charging time of the (N + 4) th pixel unit is 2 scan pulses in one frame.
9. The method for driving a display panel according to claim 7, wherein the polarity of the square-wave data signals on two adjacent data lines is opposite at the same time.
10. The method of claim 7, wherein the pixel units in the same row that are one pixel unit apart from each other are connected to the same scan line or connected to different scan lines.
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| CN110322827B (en) * | 2019-08-15 | 2022-05-10 | 成都辰显光电有限公司 | Digital driving method of display panel and display panel |
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