CN113920911B - Driving circuit and method of display panel and display device - Google Patents
Driving circuit and method of display panel and display device Download PDFInfo
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- CN113920911B CN113920911B CN202110709460.1A CN202110709460A CN113920911B CN 113920911 B CN113920911 B CN 113920911B CN 202110709460 A CN202110709460 A CN 202110709460A CN 113920911 B CN113920911 B CN 113920911B
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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
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0267—Details of drivers for scan electrodes, other than drivers for liquid crystal, plasma or OLED displays
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0275—Details of drivers for data electrodes, other than drivers for liquid crystal, plasma or OLED displays, not related to handling digital grey scale data or to communication of data to the pixels by means of a current
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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
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
- G09G2310/0283—Arrangement of drivers for different directions of scanning
Abstract
The invention provides a driving circuit and a method of a display panel and a display device, wherein the driving circuit of the display panel comprises a grid driving circuit and a source driving circuit, the source driving circuit comprises a controller, a logic switch circuit and a source driver, m signal output ends of the source driver are normally connected with m data lines of the display panel during forward scanning, line-by-line scanning driving is carried out to display a first picture, during reverse scanning, the source driver shifts a signal output end before each line of pixel units are started and shifts reversely after each line of pixel units are started, a second picture which is upside down with the first picture is displayed after line-by-line scanning driving, a data signal output by the source driving circuit is unchanged, a data address input by a real-time controller does not need to be changed, and a data signal output to the display panel is changed, and finally, an up-down reversed picture is formed, so that the problem of abnormal display pictures caused by incompatibility of the time schedule controllers is solved.
Description
Technical Field
The invention belongs to the technical field of display panels, and particularly relates to a driving circuit and method of a display panel and a display device.
Background
In some special applications, the display panel needs to have forward and reverse scanning functions, for example, the display image of the mobile phone screen can be normally placed for display or can be reversely displayed, so that the display image presents a mirror image, and then the gate driving circuit is required to perform scanning from top to bottom or from bottom to top.
In order to realize that a display picture presents a mirror image picture after forward scanning and reverse scanning, the traditional driving method is to input two groups of different data addresses through a time schedule controller, however, the problem that data mapping of the time schedule controller cannot be compatible exists when different data addresses are input through the forward scanning and the reverse scanning, and finally the display picture is abnormal.
Disclosure of Invention
The invention aims to provide a driving circuit of a display panel, and aims to solve the problem of abnormal pictures caused by incompatible data mapping of a time schedule controller in the traditional forward and reverse scanning driving method.
A first aspect of an embodiment of the present invention provides a driving circuit of a display panel, including a gate driving circuit and a source driving circuit, where the gate driving circuit is used to connect with n scan lines of the display panel, the source driving circuit includes a controller, a logic switch circuit and a source driver, the source driver includes m signal output ends, and the m signal output ends are connected with m columns of data lines of the display panel through the logic switch circuit;
the controller is triggered by the grid driving circuit to output a first control signal to the logic switch circuit by line-by-line forward scanning;
the grid driving circuit carries out reverse scanning line by line and triggers to output a second control signal to the logic switch circuit before each row of pixel units is started, and triggers to output a third control signal to the logic switch circuit after each row of pixel units is started;
the logic switch circuit is triggered by the first control signal to connect a first signal output end to an m-th signal output end of the source electrode driver with m data lines of the display panel in sequence;
triggered by the second control signal, the first signal output end to the mth signal output end of the source electrode driver are integrally shifted to the first direction by i columns and then are sequentially connected with m data lines of the display panel; and
and under the trigger of the third control signal, the first signal output end to the mth signal output end of the source electrode driver are wholly shifted by i columns towards the second direction opposite to the first direction and then are sequentially connected with m data lines of the display panel.
In one embodiment, the logic switch circuit includes m logic switches, each logic switch includes a first signal input terminal, a second signal input terminal, a third signal input terminal, and a signal output terminal, the signal output terminal of each logic switch is respectively connected to a column of data lines of the display panel, and the first signal input terminal, the second signal input terminal, and the third signal output terminal of each logic switch are respectively connected to three signal output terminals of the source driver, which are sequentially spaced by i.
In one embodiment, the display panel includes n rows by M columns of pixel units, each pixel unit includes a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, the sub-pixel units of the same type of the pixel units in different rows of the same column are connected to two adjacent data lines in a zigzag configuration, i is equal to 1.
In one embodiment, the gate driving circuit includes a gate driver and a feedback circuit, the feedback circuit being connected with the gate driver and the controller, respectively;
the gate driver is used for outputting a forward line scanning signal to n rows of scanning lines of the display panel to perform forward line-by-line scanning when receiving a forward scanning control signal; and
outputting a reverse line scanning signal to n lines of scanning lines of the display panel to perform reverse line-by-line scanning when receiving a reverse scanning control signal;
the feedback circuit is used for feeding back the forward scanning control signal and the reverse scanning control signal to the controller.
In one embodiment, the gate driver includes n sequentially connected bidirectional shift registers, and the n bidirectional shift registers are configured to output a forward line scan signal or a reverse line scan signal according to the forward scan control signal and the reverse scan control signal.
In one embodiment, the driving circuit of the display panel further comprises a timing controller connected to the gate driving circuit and the source driving circuit, respectively;
the timing controller is configured to output a forward scan control signal and a reverse scan control signal to the gate driving circuit and output a data signal to the source driver.
A second aspect of an embodiment of the present invention provides a driving method of a display panel, which is applied to the driving circuit of the display panel, and the driving method includes:
during forward scanning, after each row of pixel units is started, sequentially connecting a first signal output end to an m-th signal output end of the source electrode driver with m data lines of the display panel and outputting m paths of data signals to form a first display picture;
during reverse scanning, before each row of pixel units is started, the first signal output end to the mth signal output end of the source driver are integrally shifted by i columns towards the first direction, then the first signal output end to the mth signal output end of the source driver are sequentially connected with m data lines of the display panel and output m data signals, after each row of pixel units is started, the first signal output end to the mth signal output end of the source driver are integrally shifted by i columns towards the second direction opposite to the first direction, then the first signal output end to the mth signal output end of the source driver are sequentially connected with m data lines of the display panel and output m data signals, a second picture which is upside down with the first display picture is formed, and i is larger than or equal to 1.
In one embodiment, the display panel includes n rows by M columns of pixel units, each pixel unit includes a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, the sub-pixel units of the same type of the pixel units in different rows of the same column are connected to two adjacent data lines in a zigzag configuration, i is equal to 1.
In one embodiment, the driving method of the display panel further includes:
and acquiring a forward scanning control signal and a reverse scanning control signal to correspondingly connect m signal output ends of the source driver and m data lines of the display panel.
A third aspect of the embodiments of the present invention provides a display device, which includes a backlight, and a driving circuit including a display panel and the display panel as described above, where the display panel is connected to the driving circuit of the display panel correspondingly.
In the embodiment of the invention, the grid drive circuit and the source drive circuit are adopted to form the drive circuit of the display panel, during forward scanning, m signal output ends of the source driver are normally connected with m data lines of the display panel, line-by-line scanning drive is carried out, a first picture is displayed, during reverse scanning, the source driver shifts the signal output ends before each line of pixel units are started, and performs reverse shifting after each line of pixel units are started, a second picture which is inverted from top to bottom with the first picture is displayed after line-by-line scanning drive, the data signals output by the source driver are unchanged, the data addresses input by the real-time controller do not need to be changed, the data signals output to the display panel are changed, and the picture which is inverted from top to bottom is finally formed, so that the problem that the display picture is abnormal due to incompatibility of the timing controller is solved.
Drawings
Fig. 1 is a first structural diagram of a driving circuit of a display panel according to an embodiment of the invention;
fig. 2 is a schematic diagram of a second structure of a driving circuit of a display panel according to an embodiment of the invention;
fig. 3 is a schematic diagram of a third structure of a driving circuit of a display panel according to an embodiment of the invention;
fig. 4 is a schematic diagram illustrating a fourth structure of a driving circuit of a display panel according to an embodiment of the invention;
fig. 5 is a schematic diagram of a first exemplary screen of a reverse scan of a driving circuit of a display panel according to an embodiment of the present invention;
fig. 6 is a diagram illustrating a second exemplary screen of a reverse scan of a driving circuit of a display panel according to an embodiment of the present invention;
fig. 7 is a schematic diagram of a third exemplary screen of a reverse scan of a driving circuit of a display panel according to an embodiment of the present invention;
FIG. 8 is a diagram illustrating a fourth exemplary frame of a reverse scan of a driving circuit of a display panel according to an embodiment of the present invention;
fig. 9 is a diagram illustrating a fifth exemplary screen of a reverse scan of a driving circuit of a display panel according to an embodiment of the present invention;
fig. 10 is a diagram illustrating a sixth exemplary screen of a reverse scan of a driving circuit of a display panel according to an embodiment of the present invention;
FIG. 11 is a schematic diagram of an exemplary configuration of a logic switch circuit provided in the embodiment of FIG. 1;
fig. 12 is a schematic diagram illustrating a fifth structure of a driving circuit of a display panel according to an embodiment of the invention;
fig. 13 is a schematic diagram illustrating a sixth structure of a driving circuit of a display panel according to an embodiment of the present invention;
fig. 14 is a flowchart illustrating a driving method of a display panel according to an embodiment of the invention;
fig. 15 is a schematic structural diagram of a display device according to an embodiment of the present invention.
Wherein, in the figures, the respective reference numerals:
1-display panel, 10-gate driving circuit, 20-source driving circuit, 30-time schedule controller, 21-source driver, 22-logic switch circuit, 23-controller, 11-gate driver, 12-feedback circuit, 2-display panel driving circuit.
Detailed Description
In order to make the technical problems, technical solutions and advantageous effects to be solved by the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
It will be understood that the terms "length," "width," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like, as used herein, refer to an orientation or positional relationship indicated in the drawings that is solely for the purpose of facilitating the description and simplifying the description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and is therefore not to be construed as limiting the invention.
Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise.
Example one
A first aspect of an embodiment of the present invention provides a driving circuit 2 of a display panel.
As shown in fig. 1 and 12, the driving circuit 2 of the display panel includes a gate driving circuit 10 and a source driving circuit 20, the gate driving circuit 10 is configured to be connected to n scan lines of the display panel 1, the source driving circuit 20 includes a controller 23, a logic switching circuit 22 and a source driver 21, the source driver 21 includes m signal output terminals, and the m signal output terminals are connected to m column data lines of the display panel 1 through the logic switching circuit 22;
the controller 23 is triggered by the gate driving circuit 10 to output a first control signal to the logic switch circuit 22 by line-by-line forward scanning;
the grid-driven circuit 10 performs reverse scanning line by line, triggers and outputs a second control signal to the logic switch circuit 22 before each row of pixel units is started, and triggers and outputs a third control signal to the logic switch circuit 22 after each row of pixel units is started;
a logic switch circuit 22, triggered by a first control signal, for sequentially connecting m data lines of the display panel 1 from a first signal output end to an mth signal output end of the source driver 21;
triggered by a second control signal, the first signal output end to the mth signal output end of the source driver 21 are integrally shifted by i columns towards the first direction and then are sequentially connected with m data lines of the display panel 1; and
triggered by the third control signal, the first signal output terminal to the mth signal output terminal of the source driver 21 are shifted by i columns in the second direction opposite to the first direction and then are sequentially connected to m data lines of the display panel 1.
In this embodiment, the controller 23 may be connected to the timing controller 30 or the gate driving circuit 10, and output a corresponding switch control signal according to a scan control signal output by the timing controller 30 or a scan state of the gate driving circuit 10, wherein the logic switch circuit 22 includes m signal input terminals and m signal output terminals, and the logic switch circuit 22 correspondingly switches an internal switch connection relationship according to the switch control signal output by the controller 23, so as to change a connection manner between the source driver 21 and the display panel 1.
In the forward scanning and the backward scanning of the source driver 21, the output data signal is not changed, and the connection line between the signal output terminal of the source driver 21 and the gate line of the display panel 1 is changed.
During forward scanning, the m signal output ends of the source driver 21 are sequentially connected with the m scanning lines of the display panel 1 according to the sequence number, and during directional scanning, the m signal output ends of the source driver 21 are correspondingly displaced before and after the pixel units of each row are started according to the preset direction and the preset displacement column number, so that the m signal output ends of the source driver 21 are connected with the m scanning lines of the display panel 1 in a staggered manner, and finally, a first picture displayed by forward scanning and a second picture displayed by reverse scanning are turned upside down.
During forward scanning, the gate driving circuit 10 outputs forward line scanning signals to n scanning lines of the display panel 1 line by line from the first line to the nth line, so that n rows of pixel units of the display panel 1 are turned on line by line, and at the same time, the controller outputs a first control signal to control m signal output ends of the source driver 21 to be sequentially connected with m data lines of the display panel 1 according to sequence numbers, as shown in fig. 2, that is, the first signal output end is connected with the first data line, the second signal output end is connected with the second data line until the mth signal output end is connected with the mth data line, and when each line is turned on, the source driver 21 outputs m data signals to the display panel 1, so that forward display is achieved and a first picture is displayed.
During reverse scanning, the gate driving circuit 10 outputs reverse row scanning signals to n scanning lines of the display panel 1 line by line from the nth row to the first row, at this time, before the nth row is started, the controller 23 determines the displacement direction and the displacement column number of the signal output end of the source driver 21 according to the type of the display panel 1, and integrally displaces the m signal output ends of the source driver 21 and staggers and connects the m scanning lines of the display panel 1 by switching the switch connection relationship in the logic switch circuit according to the determined displacement direction and displacement column number, as shown in fig. 3, and outputs the data signals after dislocation to the display panel 1, at this time, the data signals output to the pixel units of the nth row during reverse scanning are the same as the data signals output to the pixel units of the first row during original forward scanning, and at the same time, after the row scanning is finished, the source driver 21 is output to the n scanning lines of the display panel 1 in the opposite directions of the same column number by switching the switch connection relationship in the logic switch circuit The m signal output terminals are shifted integrally again and connected with the m scanning lines of the display panel 1 in a staggered manner, as shown in fig. 4, so that the data signals output to the pixel units in the n-1 th row during reverse scanning are the same as the data signals output to the pixel units in the second row during original forward scanning, the data signals output to the pixel units in the n-th row to the first row during reverse scanning and the data signals output to the pixel units in the first row to the nth row during forward scanning are displayed in a manner that the first picture and the second picture are inverted from top to bottom by controlling the line-by-line shifting of the data signals.
For example, as shown in fig. 5, the display panel 1 is a zigzag-structured display panel 1, and includes 4 rows × 3 columns of sub-pixel units, when scanning in the forward direction, the gate driving circuit 10 controls the first row of sub-pixel units R1/G1/B1 to the 4 th row of sub-pixel units R4/G4/B4 to turn on line by line, the source driver 21 outputs data signals to the sub-pixel units of each row line by line, and the final display image is as shown in fig. 5.
During backward scanning, the gate driving circuit 10 controls the sub-pixel units R4/G4/B4 in the 4 th row to be turned on line by line through the sub-pixel units R1/G1/B1 in the first row, the source driver 21 determines, according to the type of the display panel 1, that each row is turned on forward by 1 column, and each row is turned on backward by one column, that is, before the 4 th row is turned on, the second signal output terminal, the third signal output terminal, the fourth signal output terminal and the first signal output terminal of the source driver 21 are respectively connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, and when turned on, the data signals on the second signal output terminal, the third signal output terminal and the fourth signal output terminal are respectively output to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signals on the sub-pixel units in the 4 th row of the display panel 1 are the data signals R1 in the first row during forward scanning /G1/B1 as shown in FIG. 6.
After the row 4 is turned on, that is, before the row 3 is turned on, the fourth signal output terminal, the first signal output terminal, the second signal output terminal and the third signal output terminal of the source driver 21 are respectively connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signals on the sub-pixel units on the row 3 of the display panel 1 are the data signals R2/G2/B2 on the row 2 during the forward scanning, as shown in fig. 7.
After the row 3 is turned on, that is, before the row 2 is turned on, the second signal output terminal, the third signal output terminal, the fourth signal output terminal and the first signal output terminal of the source driver 21 are respectively connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, when turned on, the data signals on the second signal output terminal, the third signal output terminal and the fourth signal output terminal are respectively output to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signals on each sub-pixel unit on the row 2 of the display panel 1 are the data signals R3/G3/B3 on the row 3 during forward scanning, as shown in fig. 8.
After the row 2 is turned on, that is, before the row 1 is turned on, the fourth signal output terminal, the first signal output terminal, the second signal output terminal and the third signal output terminal of the source driver 21 are respectively connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signal on each sub-pixel unit on the row 1 of the display panel 1 is the data signal R4/G4/B4 on the row 4 during forward scanning, as shown in fig. 9, the final display screen is as shown in fig. 10, and the second display screen and the first display screen are upside down during forward scanning.
By changing the connection relationship between the signal output end of the source driver 21 and the data lines of the display panel 1, the data signals output by the source driver 21 are not changed, the data addresses input by the timing controller 30 do not need to be changed, the data signals output to the display panel 1 are changed, and finally, an up-down reversed picture is formed, so that the problem that the display picture is abnormal because the timing controller 30 cannot be compatible is solved.
The controller 23 may be a single chip, a microprocessor, a central processing unit, and the like, and the source driver 21 may be a single driving chip or a plurality of shift registers, and the like, which is not limited herein.
The logic switch circuit 22 may adopt an interlocking switch or a plurality of single switches which act synchronously, and are correspondingly arranged according to requirements.
The gate driving circuit 10 can be implemented by using a corresponding gate driver or a shift register, and is specifically configured according to the requirement.
Example two
The present embodiment is embodied on the basis of the first embodiment, as shown in fig. 11, in an embodiment, the logic switch circuit 22 includes m logic switches K1, each logic switch K1 includes a first signal input terminal, a second signal input terminal, a third signal input terminal, and a signal output terminal, the signal output terminal of each logic switch K1 is respectively connected to a column of data lines of the display panel 1, and the first signal input terminal, the second signal input terminal, and the third signal output terminal of each logic switch K1 are respectively connected to three signal output terminals of the source driver 21, which are sequentially spaced by i.
During forward scanning, the signal output end of the logic switch K1 is connected with one of the data lines of the display panel 1, the first signal input end is connected with the signal output end of the source driver 21 corresponding to the serial number, during reverse scanning, the signal output end of the logic switch K1 is connected with one of the data lines of the display panel 1, and the second signal input end and the third signal output end are correspondingly connected with two signal output ends of the source driver 21 corresponding to serial numbers spaced by i columns before and after each row of pixel units is started, so that i-column displacement staggered connection in the first direction and i-column displacement staggered connection in the second direction of the display panel 1 and the source driver 21 are realized, and up-down reverse display is realized.
Wherein i is greater than or equal to 1, and the specific size and the displacement direction are specifically set according to the type of the display panel 1, as shown in fig. 5, in an embodiment, the display panel 1 includes n rows by M columns of pixel units, each pixel unit includes a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, the sub-pixel units of the same type of the pixel units in different rows of the same column are alternately connected to two adjacent data lines in a zigzag architecture, i is equal to 1, wherein the first sub-pixel unit, the second sub-pixel unit and the third sub-pixel unit are respectively one of a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, each time switching is performed, one of the scan lines of the display panel 1 is connected to an adjacent signal output terminal corresponding to the serial number of the source driver 21, for example, the second scan line is connected to the third signal output terminal of the source driver 21 when the 4 th row is turned on, is connected to the first signal output terminal of the source driver 21 when 3 rows are on.
EXAMPLE III
The present embodiment is embodied on the basis of the first embodiment, as shown in fig. 12, the gate driving circuit 10 includes a gate driver 11 and a feedback circuit 12, and the feedback circuit 12 is connected to the gate driver 11 and the controller 23 respectively;
a gate driver 11, configured to output a forward line scanning signal to n rows of scanning lines of the display panel 1 for forward line-by-line scanning when receiving a forward scanning control signal; and
outputting a reverse line scanning signal to n lines of scanning lines of the display panel 1 for reverse line-by-line scanning when receiving a reverse scanning control signal;
a feedback circuit 12 for feeding back the forward direction scanning control signal and the reverse direction scanning control signal to the controller 23.
In this embodiment, the gate driver 11 is configured to output line scanning signals line by line according to the received scanning control signal to implement forward scanning and backward scanning, and meanwhile, the controller 23 determines the current scanning action of the gate driver 11 through the feedback circuit 12 and outputs corresponding switch control signals to the logic switches K1, so as to connect the signal output ends of the source driver 21 and the data lines of the display panel 1 correspondingly according to a preset connection manner to implement forward scanning driving and backward scanning driving, thereby enabling the forward scanning and the backward scanning to display a vertically reversed picture.
The feedback circuit 12 may be implemented by an optical coupler, a sensor, or the like, and the source driver 21 may be implemented by a single driver or a plurality of shift registers, and in one embodiment, the gate driver 11 includes n sequentially connected bidirectional shift registers, and the n bidirectional shift registers are configured to output a forward line scanning signal or a reverse line scanning signal according to a forward scanning control signal and a reverse scanning control signal.
Example four
The present embodiment is optimized and embodied based on the first embodiment, as shown in fig. 13, in one embodiment, the driving circuit 2 of the display panel further includes a timing controller 30, and the timing controller 30 is respectively connected to the gate driving circuit 10 and the source driving circuit 20;
a timing controller 30 for outputting a forward scan control signal and a reverse scan control signal to the gate driving circuit 10 and outputting a data signal to the source driver 21.
In this embodiment, the timing controller 30 is configured to control the source driving circuit 20 and the gate driving circuit 10 to operate, and output a forward scanning control signal and a reverse scanning control signal to the gate driving circuit 10 according to different trigger signals, and output a data signal to the source driving circuit 20, so that the source driving circuit 20 converts and outputs a corresponding data signal to drive each row of pixel units, thereby driving the display panel 1 to implement reliable scanning driving.
EXAMPLE five
As shown in fig. 14, a second aspect of the embodiments of the present invention provides a driving method of a display panel, which is applied to the driving circuit 2 of the display panel, and the driving method includes:
step S10, during forward scanning, after each row of pixel units is turned on, sequentially connecting the first signal output end to the mth signal output end of the source driver 21 to m data lines of the display panel 1 and outputting m data signals to form a first display image;
step S20, during reverse scanning, before each row of pixel units is turned on, the first to mth signal output ends of the source driver 21 are shifted by i columns toward the first direction as a whole, and then are sequentially connected to m data lines of the display panel 1 and output m data signals, and after each row of pixel units is turned on, the first to mth signal output ends of the source driver 21 are shifted by i columns toward the second direction opposite to the first direction as a whole, and then are sequentially connected to m data lines of the display panel 1 and output m data signals, so as to form a second picture which is upside down from the first display picture, where i is greater than or equal to 1.
In the present embodiment, during the forward scanning and the reverse scanning, the output data signal is unchanged, and the connection line between the signal output terminal of the source driving circuit 20 and the gate line of the display panel 1 is changed.
During forward scanning, the gate driving circuit 10 outputs forward line scanning signals to n scanning lines of the display panel 1 line by line from the first line to the nth line, so that n rows of pixel units of the display panel 1 are turned on line by line, and at the same time, controls m signal output ends of the source driver 21 to be sequentially connected with m data lines of the display panel 1 according to a serial number, as shown in fig. 2, that is, the first signal output end is connected with the first data line, the second signal output end is connected with the second data line until the mth signal output end is connected with the mth data line, and controls the source driver 21 to output m data signals to the display panel 1 when each line is turned on, thereby implementing forward display and displaying a first picture.
During reverse scanning, the gate driving circuit 10 outputs reverse row scanning signals to n scanning lines of the display panel 1 line by line from the nth row to the first row, at this time, before the nth row is started, the source driver 21 determines the displacement direction and the displacement column number of the signal output end of the source driver 21 according to the type of the display panel 1, and controls the m signal output ends of the source driver 21 to integrally displace and be connected with the m scanning lines of the display panel 1 in a staggered manner according to the determined displacement direction and displacement column number, as shown in fig. 3, and outputs the data signals after dislocation to the display panel 1, at this time, the data signals output to the pixel units of the nth row during reverse scanning are the same as the data signals output to the pixel units of the first row during original forward scanning, and at the same time, after the row scanning is finished, the m signal output ends of the source driver 21 are controlled to integrally displace again and be connected with the m scanning lines of the display panel 1 in a staggered manner according to the same column number and opposite direction, and the data signals output to the pixel units of the n-1 th row by reverse scanning and the data signals output to the pixel units of the first row to the n-th row by forward scanning are displayed in a way of reversing the first picture and the second picture by controlling the row-by-row displacement of the data signals.
For example, as shown in fig. 5, the display panel 1 is a zigzag-structured display panel 1, and includes 4 rows × 3 columns of sub-pixel units, when scanning in the forward direction, the gate driving circuit 10 controls the first row of sub-pixel units R1/G1/B1 to the 4 th row of sub-pixel units R4/G4/B4 to turn on line by line, the source driver 21 outputs data signals to the sub-pixel units of each row line by line, and the final display image is as shown in fig. 5.
During reverse scanning, the gate driving circuit 10 controls the sub-pixel units R4/G4/B4 in the 4 th row to be turned on line by line through the sub-pixel units R1/G1/B1 in the first row, the source driver 21 determines, according to the type of the display panel 1, that each row is turned on forward by 1 column, and each row is turned on backward by one column, that is, before the 4 th row is turned on, the second signal output end, the third signal output end, the fourth signal output end and the first signal output end of the source driver 21 are controlled to be respectively connected with the first data line, the second data line, the third data line and the fourth data line of the display panel 1, and during turning on, the data signals on the second signal output end, the third signal output end and the fourth signal output end are controlled to be respectively output to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signals on each sub-pixel unit on the 4 th row of the display panel 1 are numbers on the first row during forward scanning According to the signals R1/G1/B1, as shown in FIG. 6.
After the row 4 is turned on, that is, before the row 3 is turned on, the fourth signal output terminal, the first signal output terminal, the second signal output terminal and the third signal output terminal of the source driver 21 are controlled to be connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signals on the sub-pixel units on the row 3 of the display panel 1 are the data signals R2/G2/B2 on the row 2 during forward scanning, as shown in fig. 7.
After the row 3 is turned on, that is, before the row 2 is turned on, the second signal output terminal, the third signal output terminal, the fourth signal output terminal and the first signal output terminal of the source driver 21 are controlled to be connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, and when the row 3 is turned on, the data signals on the second signal output terminal, the third signal output terminal and the fourth signal output terminal are controlled to be output to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, respectively, at this time, the data signals on each sub-pixel unit on the row 2 of the display panel 1 are the data signals R3/G3/B3 on the row 3 during the forward scanning, as shown in fig. 8.
After the 2 nd row is turned on, that is, before the 1 st row is turned on, the fourth signal output terminal, the first signal output terminal, the second signal output terminal and the third signal output terminal of the source driver 21 are controlled to be connected to the first data line, the second data line, the third data line and the fourth data line of the display panel 1, at this time, the data signals on the sub-pixel units on the 1 st row of the display panel 1 are the data signals R4/G4/B4 on the 4 th row during forward scanning, as shown in fig. 9, the final display image is shown in fig. 10, and the second display image and the first display image during forward scanning are upside down.
Wherein i is greater than or equal to 1, and the specific size and displacement direction are specifically set according to the type of the display panel 1, as shown in fig. 5, in an embodiment, the display panel 1 includes n rows × M columns of pixel units, each pixel unit includes a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, the sub-pixel units of the same type of the pixel units in different rows of the same column are connected to two adjacent data lines in a zigzag configuration, i is equal to 1, wherein the first sub-pixel unit, the second sub-pixel unit and the third sub-pixel unit are respectively one of a red sub-pixel unit, a green sub-pixel unit and a blue sub-pixel unit, each time of switching, one of the scan lines of the display panel 1 is connected to an adjacent signal output terminal corresponding to the serial number of the source driver 21, for example, the second scan line is connected to the third signal output terminal of the source driver 21 when the 4 th row is turned on, is connected to the first signal output terminal of the source driver 21 when 3 rows are on.
Meanwhile, in order to ensure that the signal terminals of the source driver 21 and the display panel are correctly connected, in one embodiment, the driving method of the display panel further includes:
and acquiring a forward scanning control signal and a reverse scanning control signal to correspondingly connect m signal output ends of the source driver 21 and m data lines of the display panel 1.
In this embodiment, the feedback circuit 12 determines the current scanning operation of the gate driver 11, and outputs corresponding switch control signals to the logic switch circuits 22, so that the signal output ends of the source driver 21 are correspondingly connected to the data lines of the display panel 1 according to a preset connection manner, thereby implementing the forward scanning driving and the reverse scanning driving, and further enabling the forward scanning and the reverse scanning to display frames upside down.
EXAMPLE six
The present invention further provides a display device, as shown in fig. 13, the display device includes a backlight 3, a display panel 1, and a driving circuit 2 of the display panel, and the specific structure of the driving circuit 2 of the display panel refers to the above embodiments, and the display device adopts all technical solutions of all the above embodiments, so that the display device at least has all the beneficial effects brought by the technical solutions of the above embodiments, and details are not repeated herein, wherein the display panel 1 is correspondingly connected to the driving circuit 2 of the display panel.
In this embodiment, the driving circuit 2 of the display panel performs progressive scanning lighting on the display panel 1 to realize normal driving, and the backlight 3 is matched to display corresponding image information.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present invention, and not for limiting the same; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present invention, and are intended to be included within the scope of the present invention.
Claims (8)
1. A drive circuit of a display panel comprises a grid drive circuit and a source drive circuit, wherein the grid drive circuit is used for being connected with n scanning lines of the display panel, and the drive circuit is characterized in that the display panel comprises n rows and M columns of pixel units, each pixel unit comprises a first sub-pixel unit, a second sub-pixel unit and a third sub-pixel unit, and the sub-pixel units of the same type of the pixel units in the same column and different rows are connected on two adjacent data lines in a zigzag framework in a staggered mode;
the source electrode driving circuit comprises a controller, a logic switch circuit and a source electrode driver, the source electrode driver comprises m signal output ends, and the m signal output ends are connected with m columns of data lines of the display panel through the logic switch circuit;
the controller is triggered by the grid drive circuit to output a first control signal to the logic switch circuit in a line-by-line forward scanning manner;
the grid driving circuit is used for scanning reversely line by line and triggering and outputting a second control signal to the logic switch circuit before each row of pixel units is started, and triggering and outputting a third control signal to the logic switch circuit after each row of pixel units is started;
the logic switch circuit is triggered by the first control signal to connect a first signal output end to an m-th signal output end of the source electrode driver with m data lines of the display panel in sequence;
triggered by the second control signal, shifting a first signal output end to an mth signal output end of the source driver to a first direction by i rows integrally, and then sequentially connecting the signal output ends with m data lines of the display panel; and
and the source driver is triggered by the third control signal to integrally shift the first signal output end to the mth signal output end of the source driver to a second direction opposite to the first direction by i rows and then is sequentially connected with m data lines of the display panel, wherein i is equal to 1.
2. The driving circuit of the display panel according to claim 1, wherein the logic switch circuit includes m logic switches, each logic switch includes a first signal input terminal, a second signal input terminal, a third signal input terminal, and a signal output terminal, the signal output terminal of each logic switch is respectively connected to a column of data lines of the display panel, and the first signal input terminal, the second signal input terminal, and the third signal output terminal of each logic switch are respectively connected to three signal output terminals of the source driver, which are sequentially spaced by i.
3. The driving circuit of the display panel according to claim 1, wherein the gate driving circuit includes a gate driver and a feedback circuit, the feedback circuit being connected to the gate driver and the controller, respectively;
the gate driver is used for outputting a forward line scanning signal to n rows of scanning lines of the display panel to perform forward line-by-line scanning when receiving a forward scanning control signal; and
outputting a reverse line scanning signal to n lines of scanning lines of the display panel to perform reverse line-by-line scanning when receiving a reverse scanning control signal;
the feedback circuit is used for feeding back the forward scanning control signal and the reverse scanning control signal to the controller.
4. The driving circuit of the display panel according to claim 3, wherein the gate driver includes n bidirectional shift registers connected in sequence, the n bidirectional shift registers being configured to output a forward line scanning signal and a reverse line scanning signal according to the forward scanning control signal and the reverse scanning control signal.
5. The driving circuit of the display panel according to claim 3, further comprising a timing controller connected to the gate driving circuit and the source driving circuit, respectively;
the timing controller is used for outputting a forward scanning control signal and a reverse scanning control signal to the grid driving circuit and outputting a data signal to the source driver.
6. A driving method of a display panel, which is applied to a driving circuit of the display panel according to any one of claims 1 to 5, the driving method comprising:
during forward scanning, after each row of pixel units is started, sequentially connecting a first signal output end to an m-th signal output end of the source electrode driver with m data lines of the display panel and outputting m paths of data signals to form a first display picture;
during reverse scanning, before each row of pixel units is started, the first signal output end to the mth signal output end of the source driver are integrally shifted by i columns towards the first direction, then the first signal output end to the mth signal output end of the source driver are sequentially connected with m data lines of the display panel and output m data signals, after each row of pixel units is started, the first signal output end to the mth signal output end of the source driver are integrally shifted by i columns towards the second direction opposite to the first direction, then the first signal output end to the mth signal output end of the source driver are sequentially connected with m data lines of the display panel and output m data signals, a second picture which is upside down with the first display picture is formed, and i is equal to 1.
7. The method of driving a display panel according to claim 6, further comprising:
and acquiring a forward scanning control signal and a reverse scanning control signal so as to correspondingly connect m signal output ends of the source driver and m data lines of the display panel.
8. A display device comprising a backlight, a display panel, and a driving circuit of the display panel according to any one of claims 1 to 5, wherein the display panel is connected to the driving circuit of the display panel.
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