CN114882847A - Display driving circuit, display driving method and display panel - Google Patents

Display driving circuit, display driving method and display panel Download PDF

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Publication number
CN114882847A
CN114882847A CN202210477633.6A CN202210477633A CN114882847A CN 114882847 A CN114882847 A CN 114882847A CN 202210477633 A CN202210477633 A CN 202210477633A CN 114882847 A CN114882847 A CN 114882847A
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data
voltage
turn
driving circuit
polarity
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CN114882847B (en
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蒋勇杰
袁海江
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HKC Co Ltd
Changsha HKC Optoelectronics Co Ltd
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HKC Co Ltd
Changsha HKC Optoelectronics Co Ltd
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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
    • G09G3/3696—Generation of voltages supplied to electrode drivers
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
    • G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
    • G09G3/3611—Control of matrices with row and column drivers
    • G09G3/3674—Details of drivers for scan electrodes
    • G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G2320/00—Control of display operating conditions
    • G09G2320/02—Improving the quality of display appearance
    • G09G2320/0209—Crosstalk reduction, i.e. to reduce direct or indirect influences of signals directed to a certain pixel of the displayed image on other pixels of said image, inclusive of influences affecting pixels in different frames or fields or sub-images which constitute a same image, e.g. left and right images of a stereoscopic display
    • Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
    • Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02D—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN INFORMATION AND COMMUNICATION TECHNOLOGIES [ICT], I.E. INFORMATION AND COMMUNICATION TECHNOLOGIES AIMING AT THE REDUCTION OF THEIR OWN ENERGY USE
    • Y02D10/00—Energy efficient computing, e.g. low power processors, power management or thermal management

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  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Crystallography & Structural Chemistry (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a display driving circuit, a display driving method and a display panel, wherein the display driving circuit comprises a time schedule controller, an integrated power management circuit and a grid driving circuit, and the time schedule controller comprises a detection module and a selection module; the detection module outputs turn-off voltage selection data according to the detected pixel array corresponding to the current picture data; the selection module selects a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputs the turn-off voltage instruction to the integrated power management circuit; and the integrated power management circuit provides corresponding turn-off voltage for the gate drive circuit according to the turn-off voltage instruction, so that the gate drive circuit drives the pixel array according to the turn-off voltage. The invention can drive the pixel array according to the turn-off voltage corresponding to the current picture data, thereby reducing the leakage current of the corresponding TFT device in the pixel array, optimizing the vertical crosstalk problem of the liquid crystal display screen and improving the display quality of the liquid crystal display screen.

Description

Display driving circuit, display driving method and display panel
Technical Field
The invention relates to the technical field of display panels, in particular to a display driving circuit, a display driving method and a display panel.
Background
In liquid crystal display, because a TFT (Thin Film Transistor) in a pixel array has leakage current when turned off, local display in a liquid crystal display screen can affect the display effect of a vertical area in the liquid crystal display screen, that is, a vertical crosstalk phenomenon exists in a display panel, a determined turn-off voltage is generally preset to reduce the leakage current of the TFT, but in liquid crystal display, the positive polarity and the negative polarity of the liquid crystal panel are continuously changed, and the actual turn-off voltage is changed accordingly, so that the effect of reducing the leakage current cannot be achieved, and the problem of the vertical crosstalk of the display panel cannot be improved.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The present invention is directed to a display driving circuit, a display driving method and a display panel, and aims to solve the technical problem of vertical crosstalk of the display panel.
In order to achieve the above object, the present invention provides a display driving circuit, which includes a timing controller, an integrated power management circuit and a gate driving circuit, wherein the integrated power management circuit is respectively connected to the timing controller and the gate driving circuit, and the gate driving circuit is connected to a pixel array;
the time schedule controller comprises a detection module and a selection module, and the detection module and the selection module are both connected with the integrated power management circuit;
the detection module is used for outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data;
the selection module is used for selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit;
and the integrated power management circuit is used for providing corresponding turn-off voltage for the grid driving circuit according to the turn-off voltage instruction, so that the grid driving circuit drives the pixel array according to the turn-off voltage.
Optionally, the turn-off voltage selection data includes gray scale detection data and polarity detection data, the detection module includes a gray scale detection unit and a polarity detection unit, and output ends of the gray scale detection unit and the polarity detection unit are connected to an input end of the selection module;
the gray scale detection unit is used for outputting corresponding gray scale detection data according to the detected gray scale value of the current picture data corresponding to the pixel array;
the polarity detection unit is used for detecting the data voltage polarity corresponding to the current picture data and outputting corresponding polarity detection data according to the data voltage polarity;
the selection module is further configured to output a corresponding turn-off voltage command to the integrated power management circuit according to the grayscale detection data and the polarity detection data.
Optionally, the selection module includes an address determination unit and a register unit, an input end of the address determination unit is connected to output ends of the gray scale detection unit and the polarity detection unit, an output end of the address determination unit is connected to an input end of the register unit, and an output end of the register unit is connected to an input end of the integrated power management circuit;
the address determining unit is used for determining address data according to the gray scale detection data and the polarity detection data;
and the register unit is used for determining a turn-off voltage instruction corresponding to the address data according to a preset mapping relation table.
Optionally, the address determination unit includes an and gate, an input end of the and gate is connected to output ends of the gray scale detection unit and the polarity detection unit, and an output end of the and gate is connected to an input end of the register unit.
Optionally, the gray scale detection unit is further configured to detect a gray scale value of the current frame data, and output corresponding gray scale detection data according to a preset gray scale range in which the gray scale value is located.
Optionally, a voltage difference between the turn-off voltage and a data signal voltage corresponding to the current picture data is equal to an off-voltage of a TFT device in the pixel array.
Optionally, the gray-scale detection data and the polarity detection data are N-bit binary data, and N is an integer greater than or equal to 1.
In order to achieve the above object, the present invention further provides a display driving method applied to a display driving circuit, where the display driving circuit includes a timing controller, an integrated power management circuit and a gate driving circuit, the integrated power management circuit is respectively connected to the timing controller and the gate driving circuit, and the display driving method includes:
outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data;
selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit;
and providing a corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage.
Optionally, the off-voltage selection data includes gray-scale detection data and polarity detection data, and the display driving method further includes:
outputting corresponding gray scale detection data according to the detected gray scale value of the current picture data corresponding to the pixel array;
detecting the data voltage polarity corresponding to the current picture data, and outputting corresponding polarity detection data according to the data voltage polarity;
and outputting a corresponding turn-off voltage instruction to the integrated power management circuit according to the gray scale detection data and the polarity detection data.
The invention provides a display driving circuit, which comprises a time schedule controller, an integrated power management circuit and a grid driving circuit, wherein the integrated power management circuit is respectively connected with the time schedule controller and the grid driving circuit; the detection module is used for outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data; the selection module is used for selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit; and the integrated power management circuit is used for providing corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage. According to the invention, the detection module outputs turn-off voltage selection data according to the current picture data, the selection module outputs a turn-off voltage instruction according to the turn-off voltage selection data, and the integrated power management circuit provides corresponding turn-off voltage for the gate drive circuit according to the turn-off voltage instruction, so that the gate drive circuit can drive the pixel array according to the turn-off voltage corresponding to the current picture data, thereby reducing the leakage current of a corresponding TFT (thin film transistor) device in the pixel array, optimizing the vertical crosstalk problem of the liquid crystal display screen, and improving the display quality of the liquid crystal display screen.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic diagram of a display driver circuit according to an embodiment of the present invention;
FIG. 2 is a graph of current-voltage curves for a TFT device in an embodiment of a display driver circuit of the present invention;
FIG. 3 is a schematic diagram of another embodiment of a display driver circuit according to the present invention;
FIG. 4 is a schematic diagram of a display driver circuit according to another embodiment of the present invention;
fig. 5 is a flowchart illustrating a display panel driving method according to a first embodiment of the invention.
The reference numbers illustrate:
reference numerals Name (R) Reference numerals Name (R)
10 Time sequence controller 20 Integrated power management circuit
30 Gate drive circuit 40 Pixel array
101 Detecting module 102 Selection module
1011 Gray scale detecting unit 1012 Polarity detection unit
402 Data line 1021 Address determination unit
1022 Register unit 401 Scanning line
The implementation, functional features and advantages of the present invention will be further described with reference to the accompanying drawings.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, technical solutions between various embodiments may be combined with each other, but must be realized by a person skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should not be considered to exist, and is not within the protection scope of the present invention.
The first embodiment.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a display panel in a hardware operating environment according to an embodiment of the present invention.
As shown in fig. 1, the display driving circuit includes a timing controller 10, an integrated power management circuit 20 and a gate driving circuit 30, where the integrated power management circuit 20 is connected to the timing controller 10 and the gate driving circuit 30, respectively, and the gate driving circuit is connected to a pixel array;
the timing controller 10 includes a detection module 101 and a selection module 102, and both the detection module 101 and the selection module 102 are connected to the integrated power management circuit 20;
the detecting module 101 is configured to output turn-off voltage selection data according to the detected current frame data corresponding to the pixel array.
It is understood that the current picture data may be data formed by a current data signal received by the pixel array and image data of an image frame corresponding to the current data signal, and the current picture data includes the image data of the image frame and polarity data of the data signal corresponding to the image frame; the turn-off voltage command may be a command for controlling the driving circuit to output a turn-off voltage to turn off a corresponding Thin Film Transistor (TFT) in the pixel array, corresponding to the current picture data; the current picture data and the turn-off voltage command are in a mapping relation, and the current picture data changes, so that the turn-off voltage command also changes.
It is to be understood that the off-voltage selection data may be data capable of controlling the selection module to select the off-voltage command corresponding to the current picture data, and the off-voltage selection data corresponding to the current picture data may be determined through a mapping relationship.
The selecting module 102 is configured to select a corresponding turn-off voltage instruction according to the turn-off voltage selection data and output the selected turn-off voltage instruction to the integrated power management circuit.
In this embodiment, the timing controller includes a detection module and a selection module, the detection module is configured to detect current frame data corresponding to the pixel array, output turn-off voltage selection data to the selection module according to the current frame data, and the selection module selects a corresponding turn-off voltage command according to the received turn-off voltage selection data and outputs the turn-off voltage command to the integrated power management circuit.
In this embodiment, the timing controller is configured to obtain current frame data corresponding to the pixel array, determine a turn-off voltage command corresponding to the detected current frame data according to the set mapping relationship, and send the turn-off voltage command to the integrated power management circuit.
The integrated power management circuit 20 is configured to provide a corresponding turn-off voltage for the gate driving circuit 30 according to the turn-off voltage instruction, so that the driving circuit drives the pixel array 40 according to the turn-off voltage.
It is understood that the pixel array includes TFT devices, data lines 402 and scan lines 401, the gate driving circuit is connected to the scan lines 401, and the source driving circuit is connected to the data lines 402. The scanning line transmits a scanning signal output by the gate driving circuit to a gate of the TFT device to control the TFT device to be turned on or turned off, and the data line transmits a data signal to a source electrode of the TFT device to charge the pixel through the TFT device to control liquid crystal molecules to deflect. In the driving process of the pixel array, the scanning is generally performed in a row-by-row manner, that is, at a certain time, the TFT devices corresponding to at least one row of pixels are in an on state, and the TFT devices corresponding to the other rows of pixels are in an off state. The gate drive circuit provides an on voltage to the gate of the TFT device in an on state and an off voltage to the gate of the TFT device in an off state. The data signal is transmitted to the sources of all TFT devices in the same column, and assuming that the voltage of the data signal is Vsource, the voltage difference between the gate and the source of the TFT device in the off state is Vgs-VGL-Vsource, referring to fig. 2, fig. 2 is a voltage-current graph of the TFT device, as can be seen from fig. 2, when the voltage between the gate and the source of the TFT device is VSS, the leakage current is minimum, in this embodiment, the integrated power management circuit provides the corresponding off-voltage VGL to the driving circuit according to the off-voltage command, and the driving circuit drives the pixel array according to the off-voltage VGL, so that the voltage Vgs between the gate and the source of the TFT device in the off state is VSS-VGL-Vsource.
It should be understood that, the integrated power management circuit receives the off-voltage command sent by the selection module, and outputs a corresponding off-voltage to the gate driving circuit according to the received off-voltage command, and the gate driving circuit drives the pixel array by the off-voltage.
In this embodiment, the detection module of the timing controller is configured to detect current frame data of the pixel array, and output turn-off voltage selection data according to the detected current frame data, where the current frame data is controlled by a current data signal, and the selection module selects a corresponding turn-off voltage command according to the turn-off voltage selection data and a preset mapping relationship and outputs the corresponding turn-off voltage command to the integrated power management circuit, and since the current frame data is controlled by the current data signal, the current turn-off voltage command also corresponds to the current data signal; the integrated power management circuit provides corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage, and the leakage current of the TFT device in the turn-off state is minimum, wherein the preset mapping relation can be obtained in the following way: determining a corresponding relation between picture data and a data signal, determining a target voltage VSS corresponding to the minimum leakage current of the TFT device according to a voltage-current curve of the TFT device, determining a turn-off voltage VGL according to a voltage Vsource corresponding to the data signal so that the voltage between a grid electrode and a source electrode is Vgs-VSS-VGL-Vsource, establishing a mapping relation between the VGL and the corresponding picture data, and obtaining a mapping relation table corresponding to the picture data and a turn-off voltage command.
Further, referring to fig. 3, in order to obtain a turn-off voltage command corresponding to current frame data, and output a turn-off voltage according to the turn-off voltage command, so as to reduce a leakage current of the TFT device, optimize vertical crosstalk of the display panel, and improve display quality of the display panel, the turn-off voltage selection data includes gray scale detection data and polarity detection data, the detection module 101 includes a gray scale detection unit 1011 and a polarity detection unit 1012, and output ends of the gray scale detection unit 1011 and the polarity detection unit 1012 are connected to an input end of the selection module; the gray scale detection unit 1011 is configured to output corresponding gray scale detection data according to the detected gray scale value of the current frame data corresponding to the pixel array 40; the polarity detection unit 1012 is configured to detect a data voltage polarity corresponding to the current frame data, and output corresponding polarity detection data according to the data voltage polarity; the selecting module 102 is further configured to output a corresponding turn-off voltage command to the integrated power management circuit according to the grayscale detection data and the polarity detection data.
It is understood that the gray-scale detection data may be preset data corresponding to the gray-scale value of the detected image data, and the gray-scale detection data may be binary data, for example, if the gray-scale value of the detected image data is 0, the gray-scale detection unit may output the gray-scale detection data of 100, the gray-scale value of 64, and the output gray-scale detection data of 101; the corresponding relationship between the gray scale values and the gray scale detection data can be set according to the actual scene, and the embodiment is not limited herein.
It should be understood that the data voltage polarity may be a voltage polarity of a data signal in the current picture data, the data voltage polarity including a positive polarity and a negative polarity; the polarity detection data may be preset data corresponding to a data voltage polarity, and the polarity detection data may be binary data, for example, if the data voltage polarity is a positive polarity, the polarity detection data output by the polarity detection unit may be 111, if the data voltage polarity is a negative polarity, the output polarity detection data may be 011, and the polarity detection data corresponding to the positive polarity and the negative polarity may also be set to other binary values, which is not limited herein.
Further, in order to reduce the leakage current of the TFT device in the off state, thereby optimizing the vertical crosstalk problem of the display panel, the voltage difference between the off voltage and the data signal voltage corresponding to the current frame data is equal to the off voltage of the TFT device in the pixel array.
In this embodiment, the cut-off voltage may be denoted by Vgs, the data signal voltage may be denoted by Vsource, and the turn-off voltage may be denoted by VGL, the turn-off voltage in this example being such that Vgs-VSS is the same as VGL-Vsource, even if the voltage difference between the gate and source of the TFT device is equal to VSS of the TFT device, the TFT device having minimal leakage current at Vgs-VSS.
Further, if the corresponding gray scale detection data is output for each gray scale value, a large amount of storage space is required, which also results in a reduction in data output efficiency, and in order to save storage space and improve the output efficiency of the gray scale detection data, the gray scale detection unit 101 is further configured to detect the gray scale value of the current frame data and output the corresponding gray scale detection data according to the preset gray scale range in which the gray scale value is located.
It can be understood that the preset gray scale range may be a preset gray scale range corresponding to the gray scale detection data, and the preset gray scale range corresponds to the gray scale detection data, that is, when different gray scale values are in the same preset gray scale range, the gray scale detection unit outputs the same gray scale detection data; for example, the predetermined gray scale range and the corresponding gray scale detection data are: 0-63 corresponds to 100, 64-126 corresponds to 101, 127-254 corresponds to 110, 255 corresponds to 111, if the gray scale values of the detected frame data within the preset time duration are 0, 35, 62 and 66 respectively, the output gray scale detection data are 100, 100 and 101 respectively; the binary value corresponding to the preset gray scale range may be set to other values according to the actual scene, and the embodiment is not limited herein.
The embodiment provides a display driving circuit, which comprises a time schedule controller, an integrated power management circuit and a gate driving circuit, wherein the integrated power management circuit is respectively connected with the time schedule controller and the gate driving circuit; the detection module is used for outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data; the selection module is used for selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit; and the integrated power management circuit is used for providing corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage. According to the invention, the detection module outputs turn-off voltage selection data according to the current picture data, the selection module outputs a turn-off voltage instruction according to the turn-off voltage selection data, and the integrated power management circuit provides corresponding turn-off voltage for the gate drive circuit according to the turn-off voltage instruction, so that the gate drive circuit can drive the pixel array according to the turn-off voltage corresponding to the current picture data, thereby reducing the leakage current of a corresponding TFT (thin film transistor) device in the pixel array, optimizing the vertical crosstalk problem of the liquid crystal display screen, and improving the display quality of the liquid crystal display screen.
Example two
Referring to fig. 3, in the present embodiment, the selection module 102 includes an address determination unit 1021 and a register unit 1022, an input end of the address determination unit 1021 is connected to output ends of the gray level detection unit 1011 and the polarity detection unit 1012, an output end of the address determination unit 1021 is connected to an input end of the register unit 1022, and an output end of the register unit 1022 is connected to an input end of the integrated power management circuit 20;
the address determining unit 1021 is configured to determine address data according to the gray-scale detection data and the polarity detection data.
In this embodiment, the address data may be address data of a preset mapping relation table; the address determining unit processes the gray scale detection data and the polarity detection data and determines the address data of the preset relation table according to the processing result.
The register unit 1022 is configured to determine, according to a preset mapping table, a turn-off voltage instruction corresponding to the address data.
In a specific implementation, the address determining unit processes the input gray scale detection data and the polarity detection data, determines address data of a preset mapping table according to a processing result, transmits the address data to the register unit, and the register unit reads a corresponding turn-off voltage instruction from the preset mapping table according to the address data.
Further, referring to fig. 4, in order to improve efficiency of outputting address data to improve display quality, the address determination unit 1011 includes an and gate, an input terminal of the and gate & is connected to the gray scale detection unit 1011 and the output terminal of the polarity detection unit 1012, and an output terminal of the and gate & is connected to an input terminal of the register unit 1022.
In this embodiment, one input terminal of the and gate inputs the gray scale detection data, the other input terminal inputs the polarity detection data, and the and gate performs and operation on the gray scale detection data and the polarity detection data, and outputs binary data having the same number of bits as the gray scale detection data and the polarity detection data.
Further, in order to improve the efficiency of outputting the address data, the gray scale detection data and the polarity detection data are N-bit binary data, where N is an integer greater than or equal to 1.
In one embodiment, for example, referring to table 1, the relationship between the gray level detection data and the gray level values is set as: positive polarity-111, negative polarity-011, the preset mapping table can refer to table 2, if the gray scale detection unit detects that the gray scale value of the current frame data corresponding to the pixel array is 0, the gray scale detection data output by the gray scale detection unit is 100, the data voltage polarity corresponding to the current frame data detected by the polarity detection unit is positive, the model detection data output by the polarity detection unit is 111, 100 and 111 are input into and gates for and operation, the address data 100 is output to the register unit, the register unit finds out that the corresponding off-voltage command is the V1 off-voltage command in the preset mapping table according to the address data 100, the V1 off-voltage command is transmitted to the integrated power management circuit, the integrated power management circuit provides the off-voltage V1 for the driving circuit 30 according to the V1 off-voltage command, the driving circuit 30 drives the corresponding TFT device in the pixel array to be in the off state according to V1, to optimize the vertical crosstalk of the display panel.
TABLE 1 grayscale detection data-grayscale value correspondence table
Gray scale value Gray scale detection data
0 100
64 101
127 110
255 111
TABLE 2 Preset mapping Table
Address data Off voltage command
100 V1 turn-off voltage command
101 V2 turn-off voltage command
110 V3 turn-off voltage command
111 V4 turn-off voltage command
In the display panel according to the technical solution of this embodiment, the selection module includes an address determination unit and a register unit, an input end of the address determination unit is connected to output ends of the gray scale detection unit and the polarity detection unit, an output end of the address determination unit is connected to an input end of the register unit, and an output end of the register unit is connected to an input end of the integrated power management circuit; the address determining unit is used for determining address data according to the gray scale detection data and the polarity detection data; and the register unit is used for determining a turn-off voltage instruction corresponding to the address data according to a preset mapping relation table. The method and the device can determine the address data according to the gray scale detection data and the polarity detection data, and determine the corresponding turn-off voltage command according to the address data, and the embodiment can determine the corresponding address data according to the gray scale detection data and the polarity detection data, and determine the corresponding turn-off voltage command according to the address data, thereby reducing the acquisition duration of the turn-off voltage command, enabling the gate driving circuit to drive the pixel array in time according to the turn-off voltage, reducing the leakage current of the TFT device, and improving the display quality of the display panel.
EXAMPLE III
In addition, the embodiment of the invention also provides a display driving method. Referring to fig. 5, fig. 5 is a flowchart illustrating a display driving method according to a first embodiment of the present invention.
In this embodiment, the display driving method includes the steps of:
step S10: outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data;
step S20: selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit;
step S30: and providing a corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage.
Further, in order to obtain an off-voltage command corresponding to the picture data, the display driving method further includes: outputting corresponding gray scale detection data according to the detected gray scale value of the current picture data corresponding to the pixel array; detecting the data voltage polarity corresponding to the current picture data, and outputting corresponding polarity detection data according to the data voltage polarity; and outputting a corresponding turn-off voltage instruction to the integrated power management circuit according to the gray scale detection data and the polarity detection data.
Determining a corresponding turn-off voltage instruction according to current picture data corresponding to the pixel array; and providing corresponding turn-off voltage for the driving circuit according to the turn-off voltage instruction. According to the embodiment, the pixel array can be driven according to the turn-off voltage corresponding to the current picture data, so that the leakage current of the corresponding TFT device in the pixel array is reduced, the vertical crosstalk problem of the liquid crystal display screen is optimized, and the display quality of the liquid crystal display screen is improved.
In order to achieve the above object, the present invention further provides a display panel, which includes an array substrate and the display driving circuit as described above, wherein the display driving circuit is connected to the array substrate. Since the display panel adopts all the technical solutions of all the embodiments, at least all the beneficial effects brought by the technical solutions of the embodiments are achieved, and no further description is given here.
In order to achieve the above object, the present invention further provides a display including the display panel as described above. The specific structure of the display panel refers to the above embodiments, and since the display adopts all technical solutions of all the above embodiments, at least all the beneficial effects brought by the technical solutions of the above embodiments are achieved, and no further description is given here.
The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention, and all equivalent structural changes made by using the contents of the present specification and the drawings, or any other related technical fields, which are directly or indirectly applied to the present invention, are included in the scope of the present invention.

Claims (10)

1. A display driving circuit comprises a time schedule controller, an integrated power management circuit and a grid driving circuit, wherein the integrated power management circuit is respectively connected with the time schedule controller and the grid driving circuit;
the time schedule controller comprises a detection module and a selection module, and the detection module and the selection module are both connected with the integrated power management circuit;
the detection module is used for outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data;
the selection module is used for selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit;
and the integrated power management circuit is used for providing corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage.
2. The display driving circuit according to claim 1, wherein the off-voltage selection data comprises gray-scale detection data and polarity detection data, the detection module comprises a gray-scale detection unit and a polarity detection unit, and output ends of the gray-scale detection unit and the polarity detection unit are connected to an input end of the selection module;
the gray scale detection unit is used for outputting corresponding gray scale detection data according to the detected gray scale value of the current picture data corresponding to the pixel array;
the polarity detection unit is used for detecting the data voltage polarity corresponding to the current picture data and outputting corresponding polarity detection data according to the data voltage polarity;
the selection module is further configured to output a corresponding turn-off voltage command to the integrated power management circuit according to the grayscale detection data and the polarity detection data.
3. The display driving circuit according to claim 2, wherein the selection module comprises an address determination unit and a register unit, an input terminal of the address determination unit is connected to output terminals of the gray-scale detection unit and the polarity detection unit, an output terminal of the address determination unit is connected to an input terminal of the register unit, and an output terminal of the register unit is connected to an input terminal of the integrated power management circuit;
the address determining unit is used for determining address data according to the gray scale detection data and the polarity detection data;
and the register unit is used for determining a turn-off voltage instruction corresponding to the address data according to a preset mapping relation table.
4. The display driving circuit according to claim 3, wherein the address determining unit comprises an AND gate, an input terminal of the AND gate is connected to the output terminals of the gray-scale detecting unit and the polarity detecting unit, and an output terminal of the AND gate is connected to the input terminal of the register unit.
5. The display driving circuit as claimed in claim 2, wherein the gray level detecting unit is further configured to detect a gray level value of the current frame data and output corresponding gray level detecting data according to a predetermined gray level range in which the gray level value is located.
6. The display drive circuit according to any one of claims 2 to 5, wherein a voltage difference between the off-voltage and a data signal voltage corresponding to the current picture data is equal to an off-voltage of a TFT device in the pixel array.
7. The display driving circuit according to any one of claims 2 to 5, wherein the gray-scale detection data and the polarity detection data are N-bit binary data, N being an integer of 1 or more.
8. A display driving method is applied to a display driving circuit, the display driving circuit comprises a time schedule controller, an integrated power management circuit and a grid driving circuit, the integrated power management circuit is respectively connected with the time schedule controller and the grid driving circuit, and the display driving method is characterized by comprising the following steps:
outputting turn-off voltage selection data according to the detected pixel array corresponding to the current picture data;
selecting a corresponding turn-off voltage instruction according to the turn-off voltage selection data and outputting the corresponding turn-off voltage instruction to the integrated power management circuit;
and providing a corresponding turn-off voltage for the gate driving circuit according to the turn-off voltage instruction, so that the gate driving circuit drives the pixel array according to the turn-off voltage.
9. The display driving method according to claim 8, wherein the off-voltage selection data includes gray-scale detection data and polarity detection data, the display driving method further comprising:
outputting corresponding gray scale detection data according to the detected gray scale value of the current picture data corresponding to the pixel array;
detecting the data voltage polarity corresponding to the current picture data, and outputting corresponding polarity detection data according to the data voltage polarity;
and outputting a corresponding turn-off voltage instruction to the integrated power management circuit according to the gray scale detection data and the polarity detection data.
10. A display panel comprising an array substrate and the display driver circuit according to any one of claims 1 to 7, the display driver circuit being connected to the array substrate.
CN202210477633.6A 2022-04-29 2022-04-29 Display driving circuit, display driving method and display panel Active CN114882847B (en)

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