CN113450702B - Circuit driving method and device - Google Patents
Circuit driving method and device Download PDFInfo
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- CN113450702B CN113450702B CN202010803782.8A CN202010803782A CN113450702B CN 113450702 B CN113450702 B CN 113450702B CN 202010803782 A CN202010803782 A CN 202010803782A CN 113450702 B CN113450702 B CN 113450702B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
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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
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The application discloses a circuit driving method and a device, wherein the method comprises the following steps: acquiring a first gray value and a second gray value, wherein the first gray value represents the gray value of a pixel unit in a previous frame image, and the second gray value is the gray value to be displayed in the current frame image; determining a pre-charge flow value combination according to the first gray value and the second gray value; wherein the pre-charge current value combination is used to determine the current output to the column line each time; according to the method and the device, the pixel unit is driven according to the state of the row signal, the state of the column signal and the pre-charging current value in a combined mode, and the problem that the pixel unit in the related technology is insufficient in display uniformity is solved.
Description
Technical Field
The present invention relates to the field of circuit technologies, and in particular, to a circuit driving method and apparatus.
Background
In the Field of driving circuits of Light Emitting Diode (LED) display screens, with the distance between pixels of the display screen becoming smaller and smaller, the LED display screens have made higher requirements for driving circuits, and the LED display screens are currently switched from Power Metal-Oxide-Semiconductor Field-Effect transistors (P-MOSFETs) to multifunctional driving with higher integration and higher functions. Although the function of the LED is improved and the display effect is better, there are few problems derived from the function. The pixel unit in the LED display screen is a device driven by current, and in a row signal period, the difference of the waveform pulse width of a column signal represents the difference of gray scales, the pulse width of high gray scale is wide, and the pulse width of low gray scale is narrow. Due to the existence of the parasitic capacitance in the loop where each pixel unit is located, the current passing through the pixel unit is likely to reach the ideal current value only in a small part of time within the pulse width time of the column signal, even the actual current value cannot reach the ideal current value all the time due to too narrow pulse width, and further the display uniformity of the brightness or the chromaticity of the pixel unit at a low gray scale value is insufficient.
In order to solve the problem of insufficient display uniformity of pixel units in the related art, no effective solution has been proposed.
Disclosure of Invention
In view of the foregoing disadvantages, it is a primary objective of the present invention to provide a driving method and apparatus to solve the problem of insufficient display uniformity of a pixel unit in the related art.
In order to achieve the above object, according to one aspect of the present application, there is provided a circuit driving method including a row line generating a row signal for driving a pixel cell, a column line generating a column signal for driving the pixel cell, and a pixel cell connected to the row line and the column line, the method including, in each row signal period: acquiring a first gray value and a second gray value, wherein the first gray value represents the gray value of the pixel unit in the previous frame image, and the second gray value is the gray value to be displayed in the current frame image; determining a pre-charge flow value combination according to the first gray value and the second gray value; wherein the precharge current value combination is used to determine the current output to the column line at each time; driving the pixel cell according to the state of the row signal, the state of the column signal, and the precharge stream value combination.
Further, before acquiring the first gray scale value and the second gray scale value, the method includes: acquiring a gray value range displayed by the pixel unit and the pre-charging flow times of the pixel unit; determining a pre-charge flow value set according to the gray value range and the pre-charge flow times, wherein the pre-charge flow value set comprises a corresponding pre-charge flow value combination when the pixel unit is switched from any gray value in the gray value range to another gray value; creating a precharge flow value table of the pixel unit according to the gray value range and the precharge flow value set; determining a pre-charge flow value combination from the first gray scale value and the second gray scale value comprises: and inquiring in the pre-charging current value table according to the first gray value and the second gray value to obtain a pre-charging current value combination corresponding to the first gray value and the second gray value.
Further, the multiple groups of precharge current values respectively correspond to each on state of the column signal one to one, and driving the pixel unit according to the state of the row signal, the state of the column signal, and the precharge current value combination includes: when the state of the row signal is an on state, acquiring a plurality of switch states of the column signal; sequentially determining a pre-charge flow value corresponding to the current on state of the column signal from the pre-charge flow value combination at each on state of the column signal; the pixel cell is driven according to a pre-charge flow value corresponding to a current on state of the column signal.
Further, after driving the pixel cells according to the state of the row signal, the state of the column signal, and the precharge stream value combination, the method comprises: judging whether the display effect of the pixel unit reaches a preset target or not, and if the display effect of the pixel unit does not reach the preset target, adjusting a pre-charging current value combination; and updating the pre-charging current value table according to the adjusted pre-charging current value combination.
In order to achieve the above object, according to another aspect of the present application, there is provided a circuit driving device including a row line generating a row signal for driving a pixel cell, a column line generating a column signal for driving the pixel cell, and a pixel cell connected to the row line and the column line, the device including, in each row signal period: the image display device comprises a first acquisition unit, a second acquisition unit and a display unit, wherein the first acquisition unit is used for acquiring a first gray value and a second gray value, the first gray value represents the gray value of the pixel unit in the previous frame image, and the second gray value is the gray value to be displayed of the pixel unit in the current frame image; a first determining unit, configured to determine a pre-charge stream value combination according to the first gray scale value and the second gray scale value; wherein the precharge current value combination is used to determine the current output to the column line at each time; the first driving unit is used for driving the pixel unit according to the state of the row signal, the state of the column signal and the pre-charging stream value in a combined mode.
Further, the apparatus comprises: the second acquisition unit is used for acquiring the gray value range displayed by the pixel unit and the pre-charging flow times of the pixel unit before acquiring the first gray value and the second gray value; a second determining unit, configured to determine a set of pre-charge stream values according to the gray value range and the number of times of pre-charge stream, where the set of pre-charge stream values includes a corresponding combination of pre-charge stream values when the pixel unit is switched from any gray value in the gray value range to another gray value; a building unit configured to create a precharge flow value table of the pixel unit according to the gray value range and the precharge flow value set, wherein the first determining unit includes: and the query module is used for querying in the precharge current value table according to the first gray value and the second gray value to obtain a precharge current value combination corresponding to the first gray value and the second gray value.
Further, the plurality of groups of precharge current values respectively correspond to each on state of the column signals one to one, and the first driving unit includes: the acquisition module is used for acquiring a plurality of switch states of the column signal when the state of the row signal is in an on state; a determining module, configured to determine, in each on state of the column signal in turn, a pre-charge stream value corresponding to a current on state of the column signal from the pre-charge stream value combination; and the driving module is used for driving the pixel unit according to a pre-charging flow value corresponding to the current on state of the column signal.
Further, the apparatus comprises: a judging unit, configured to judge whether a display effect of the pixel unit reaches a preset target after driving the pixel unit according to the state of the row signal, the state of the column signal, and the pre-charge current value combination, and adjust the pre-charge current value combination if the display effect of the pixel unit does not reach the preset target; and the updating unit is used for updating the pre-charging current value table according to the adjusted pre-charging current value combination.
Through the application, the following steps are adopted: acquiring a first gray value and a second gray value, wherein the first gray value represents the gray value of the pixel unit in the previous frame image, and the second gray value is the gray value to be displayed in the current frame image; determining a pre-charge flow value combination according to the first gray value and the second gray value; wherein the precharge current value combination is used to determine the current output to the column line at each time; and driving the pixel unit according to the state of the row signal, the state of the column signal and the pre-charging current value in a combined mode, so that the problem of insufficient display uniformity of the pixel unit in the related art is solved. And then the effect of improving the display uniformity of the pixel units in the LED display screen is achieved.
Drawings
Fig. 1 is a flowchart of a circuit driving method according to an embodiment of the present application;
FIG. 2 is a circuit connection diagram of a circuit driving method according to an embodiment of the present application;
FIG. 3 is a schematic diagram of a driving timing sequence of a circuit driving method according to an embodiment of the present application; and
fig. 4 is a schematic diagram of a circuit driving apparatus provided according to an embodiment of the present application.
Detailed Description
To facilitate an understanding of the present application, the present application will now be described more fully with reference to the accompanying drawings. Preferred embodiments of the present application are given in the accompanying drawings. This application may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs. The terminology used herein in the description of the present application is for the purpose of describing particular embodiments only and is not intended to be limiting of the application.
Because the actual driving circuit has parasitic capacitance, the parasitic capacitance distributed in the loop where the pixel unit is located causes that only a small part of time of the current passing through the pixel unit reaches the design value in each conducting time of the pixel unit, and when the gray value is low, the conducting time is shorter, so that the current passing through the pixel unit is always lower than the design value in the conducting time period of the pixel unit, and the display uniformity of the brightness or the chroma of the pixel unit is insufficient.
Based on this, the present application intends to provide a solution to the above technical problem, the details of which will be explained in the following embodiments.
Fig. 1 is a flowchart of a circuit driving method according to an embodiment of the present application. As shown in fig. 1, the method comprises the steps of:
step S101, a first gray value and a second gray value are obtained.
The LED driving circuit comprises a plurality of row lines, column lines and a plurality of pixel units connected with each row line and column line, wherein the row lines generate row signals for driving the pixel units, the column lines generate column signals for driving the pixel units, and the gray level display of the pixel units can be controlled by controlling the output state of the column signals in each row signal period so as to form an image; the first gray scale value in the embodiment of the present application represents the gray scale value of the pixel unit in the previous frame image, and the second gray scale value represents the gray scale value to be displayed in the current frame image.
Optionally, in the circuit driving method provided in the embodiment of the present application, before acquiring the first grayscale value and the second grayscale value, the method includes: acquiring a gray value range displayed by a pixel unit and the pre-charging flow times of the pixel unit; determining a pre-charge flow value set according to the gray value range and the pre-charge flow times, wherein the pre-charge flow value set comprises a corresponding pre-charge flow value combination when the pixel unit is switched from any gray value in the gray value range to another gray value; a precharge flow value table of the pixel unit is created according to the gray value range and the precharge flow value set.
In order to quickly and accurately obtain the precharge current value for driving the pixel unit, a precharge current value table of the pixel unit needs to be constructed in advance before application, and the method can be as follows: determining all possible switching combinations of the gray value of the pixel unit from the gray value in the previous frame image to the gray value in the frame image to be displayed according to the gray level range displayed by the pixel unit, determining a corresponding pre-charging current value set according to all the possible switching combinations and the number of times of pre-charging current, and further constructing a pre-charging current value table of the pixel unit according to all the possible switching combinations and the corresponding pre-charging current value set of the pixel unit.
For example, the gray scale value range displayed by the pixel unit is 4, and the gray scale value displayed by the pixel unit in each frame image may be any one of the gray scale value 0, the gray scale value 1, the gray scale value 2, and the gray scale value 3. Thus, 16 possible corresponding combination modes for switching a pixel point from any gray value in the gray value range to another gray value are provided, for example, the pixel unit is switched from the gray value 1 in the previous frame image to the gray value 2 in the frame image to be displayed. And determining 16 groups of corresponding precharge current value combinations according to the 16 gray value switching combinations of the pixel units, and constructing a precharge current value table according to the 16 gray value switching combinations of the pixel units and the corresponding 16 groups of precharge current value combinations. Table 1 is a precharge current value table constructed with a range of pixel cell grayscale values of 4 and a number of precharge current times of 3, as shown in table 1, each column represents the grayscale value of the pixel cell in the previous frame image, and each row represents the grayscale value of the pixel cell in the frame to be displayed, for example, I12, I12, and I12 represent the corresponding 3 precharge current values when the pixel cell is switched from grayscale value 1 to grayscale value 2.
TABLE 1
Step S102, determining a pre-charge flow value combination according to the first gray value and the second gray value.
In order to more accurately determine the magnitude of the pre-charging current to be output, the pre-charging current value combination is determined through the first gray scale value and the second gray scale value, and the pre-charging current value combination is used for determining the current output to the column line each time.
Optionally, in the circuit driving method provided in the embodiment of the present application, determining the pre-charge flow value combination according to the first gray scale value and the second gray scale value includes: and inquiring in a precharge flow value table according to the first gray value and the second gray value to obtain a precharge flow value combination corresponding to the first gray value and the second gray value.
In order to quickly and accurately obtain the precharge current value for driving the pixel unit, in the circuit driving method of the embodiment of the present application, a precharge current value table of the pixel unit is constructed in advance before application, and all the gray value switching combinations of the pixel unit formed by switching the gray value displayed in the previous frame image to the gray value in the frame image to be displayed and the corresponding precharge current value combinations are stored in the precharge current value table. Therefore, when the pre-charging current value combination needs to be determined in application, the pre-charging current value combination corresponding to the gray value switching combination formed by the first gray value and the second gray value can be obtained by directly inquiring in the pre-charging current value table according to the first gray value and the second gray value.
In step S103, the pixel unit is driven according to the state of the row signal, the state of the column signal, and the precharge current value.
Since the driving of the pixel unit is affected by the row signal, the column signal and the precharge current at the same time, as shown in fig. 2, only when the states of the row signal and the column signal are all low, the circuit where the pixel unit is located is turned on, and then the current output to the loop where the pixel unit is located is controlled according to the precharge current value combination, thereby realizing the driving of the pixel unit.
Optionally, in the circuit driving method provided in this embodiment of the present application, the plurality of groups of precharge current values respectively correspond to each on state of the column signal one to one, and driving the pixel unit according to the state of the row signal, the state of the column signal, and the precharge current value combination includes: when the state of the row signal is an on state, acquiring a plurality of switch states of the column signal; determining a pre-charge flow value corresponding to the current on-state of the column signal from the pre-charge flow value combination in each on-state of the column signal in turn; the pixel cell is driven according to the pre-charge current value corresponding to the current on-state of the column signal.
Since the pixel unit is controlled by the row signal and the column signal at the same time, in the circuit driving method of the embodiment of the application, the on state corresponds to the low level, and the off state corresponds to the high level, and only when the row signal and the column signal are both in the on state, the loop where the pixel unit is located can be turned on. During a row signal period, the row signal is always in an on state, and the column signal is scattered into a state of a plurality of switches alternately, which helps to improve the refresh rate of the pixel unit. As shown in fig. 3, each of the precharge current values in the precharge current value combination corresponds to each of the on states of the column signal, and in each of the on states of the column signal, the precharge current value corresponding to the current on state of the column signal is determined from the precharge current value combination, and the current output to the circuit in which the pixel unit is located is determined according to the precharge current value, thereby implementing the driving of the pixel unit.
The value of each precharge current in the precharge current value combination may be different and all smaller than the predetermined value and gradually increase. The current is output to the loop of the pixel unit in a stepping mode in a gradually increasing mode, the parasitic capacitance in the loop is charged in a faster time, particularly, the purpose of fully charging the parasitic capacitance before the last group of pre-charging current is output is ensured when the gray scale value is low, so that the influence of the parasitic capacitance on the current passing through the pixel unit is reduced, the current passing through the pixel unit is more accurate, and the phenomenon of uneven display of low gray scale brightness or chromaticity is improved.
Optionally, in a circuit driving method provided in an embodiment of the present application, after driving a pixel unit according to a state of a row signal, a state of a column signal, and a precharge current value, the method includes: judging whether the display effect of the pixel unit reaches a preset target or not, and if the display effect of the pixel unit does not reach the preset target, adjusting a pre-charging current value combination; and updating the pre-charging current value table according to the adjusted pre-charging current value combination.
The driving method provided in the embodiment of the present application is intended to optimize the display effect of the pixel unit, and therefore, after the application of the driving method, it needs to evaluate whether the driving method of the present application achieves the expected driving display effect on the pixel unit, and if the expected driving display effect is not achieved, the driving display effect after adjustment is re-evaluated by adjusting the pre-charge current value combination and according to the adjusted pre-charge current value combination, until the driving display effect of the pixel unit achieves the expected display effect in the evaluation, the pre-charge current value table is updated based on the pre-charge current value combination corresponding to the evaluation, so as to ensure that the pixel unit is driven according to the updated pre-charge current value table subsequently, and the pixel unit achieves the expected driving display effect.
To sum up, in the circuit method provided in the embodiment of the present application, a first gray value and a second gray value are obtained, where the first gray value represents a gray value of a pixel unit in a previous frame image, and the second gray value is a gray value to be displayed in a current frame image; determining a pre-charge flow value combination according to the first gray value and the second gray value; wherein the pre-charge current value combination is used to determine the current output to the column line each time; the pixel unit is driven according to the state of the row signal, the state of the column signal and the pre-charging flow value in a combined mode, and the problem that the display uniformity of the pixel unit is insufficient in the related art is solved. And then the effect of improving the display uniformity of the pixel units in the LED display screen is achieved.
It should be noted that the steps illustrated in the flowcharts of the figures may be performed in a computer system such as a set of computer-executable instructions and that, although a logical order is illustrated in the flowcharts, in some cases, the steps illustrated or described may be performed in an order different than here.
The embodiment of the present application further provides a circuit driving apparatus, and it should be noted that the circuit driving apparatus according to the embodiment of the present application may be used to execute the method for driving a circuit according to the embodiment of the present application. The circuit driving device provided by the embodiment of the present application is described below.
Fig. 4 is a schematic diagram of a circuit driving device according to an embodiment of the present application. As shown in fig. 4, the apparatus includes: a first acquisition unit 401, a first determination unit 402 and a first drive unit 403.
Specifically, the first obtaining unit 401 is configured to obtain a first gray scale value and a second gray scale value, where the first gray scale value represents a gray scale value of a pixel unit in a previous frame image, and the second gray scale value is a gray scale value to be displayed by the pixel unit in a current frame image;
a first determining unit 402 for determining a pre-charge stream value combination according to the first gray value and the second gray value; wherein the pre-charge current value combination is used to determine the current output to the column line each time;
the first driving unit 403 is used for driving the pixel unit according to the state of the row signal, the state of the column signal and the pre-charge current value.
In summary, in the circuit driving device according to the embodiment of the invention, the first obtaining unit 401 obtains a first gray scale value and a second gray scale value, where the first gray scale value represents a gray scale value of the pixel unit in the previous frame image, and the second gray scale value represents a gray scale value to be displayed by the pixel unit in the current frame image; a first determining unit 402 that determines a pre-charge stream value combination according to the first gray value and the second gray value; wherein the pre-charge current value combination is used to determine the current output to the column line each time; the first driving unit 403 drives the pixel units according to the states of the row signals, the states of the column signals and the pre-charge current value, so that the problem of insufficient display uniformity of the pixel units in the related art is solved, and the effect of improving the display uniformity of the pixel units in the LED display screen is achieved.
Optionally, in a circuit driving device provided according to an embodiment of the present application, the device includes: the second acquisition unit is used for acquiring the gray value range displayed by the pixel unit and the pre-charging flow times of the pixel unit before acquiring the first gray value and the second gray value; the second determining unit is used for determining a pre-charge flow value set according to the gray value range and the pre-charge flow times, wherein the pre-charge flow value set comprises a corresponding pre-charge flow value combination when the pixel unit is switched from any gray value in the gray value range to another gray value; a building unit for creating a pre-charge stream value table for a pixel cell from a gray value range and a set of pre-charge stream values, the first determining unit 402 comprising: and the query module is used for querying in the precharge current value table according to the first gray value and the second gray value to obtain a precharge current value combination corresponding to the first gray value and the second gray value.
Optionally, in the circuit driving apparatus provided in the embodiment of the present application, a plurality of groups of precharge current values respectively correspond to each on state of the column signals one to one, and the first driving unit includes: the acquisition module is used for acquiring a plurality of switch states of the column signal when the state of the row signal is an on state; the determining module is used for determining a pre-charging flow value corresponding to the current on state of the column signal from the pre-charging flow value combination when each on state of the column signal is performed in sequence; and the driving module is used for driving the pixel unit according to the pre-charging current value corresponding to the current on state of the column signal.
Optionally, in a circuit driving device provided according to an embodiment of the present application, the device includes: the judging unit is used for judging whether the display effect of the pixel unit reaches a preset target or not after the pixel unit is driven according to the state of the row signal, the state of the column signal and the pre-charge current value combination, and adjusting the pre-charge current value combination if the display effect of the pixel unit does not reach the preset target; and the updating unit is used for updating the pre-charging current value table according to the adjusted pre-charging current value combination.
The circuit driving apparatus includes a processor and a memory, the first obtaining unit 401, the determining unit 402, the first driving unit 403, and the like are stored in the memory as program units, and the processor executes the program units stored in the memory to implement corresponding functions.
The processor comprises a kernel, and the kernel calls the corresponding program unit from the memory. The kernel can be set to be one or more than one, and the display uniformity of the pixel units in the LED display screen is improved by adjusting the kernel parameters.
The memory may include volatile memory in a computer readable medium, Random Access Memory (RAM) and/or nonvolatile memory such as Read Only Memory (ROM) or flash memory (flash RAM), and the memory includes at least one memory chip.
An embodiment of the present invention provides a computer-readable storage medium on which a program is stored, the program implementing the circuit driving method when executed by a processor.
The embodiment of the invention provides a processor, which is used for running a program, wherein the circuit driving method is executed when the program runs.
It is to be understood that the invention is not limited to the examples described above, but that modifications and variations may be effected thereto by those of ordinary skill in the art in light of the foregoing description, and that all such modifications and variations are intended to be within the scope of the invention as defined by the appended claims.
Claims (8)
1. A circuit driving method, wherein the circuit includes a row line, a column line, and a pixel cell connected to the row line and the column line, the row line generating a row signal for driving the pixel cell, the column line generating a column signal for driving the pixel cell, the method comprising, in each row signal period:
acquiring a first gray value and a second gray value, wherein the first gray value represents the gray value of the pixel unit in the previous frame image, and the second gray value is the gray value to be displayed in the current frame image;
determining a pre-charge flow value combination according to the first gray value and the second gray value; wherein the precharge current value combination is used to determine the current output to the column line at each time;
driving the pixel cell according to the state of the row signal, the state of the column signal, and the pre-charge stream value combination;
wherein, prior to acquiring the first grayscale value and the second grayscale value, the method comprises:
acquiring a gray value range displayed by the pixel unit and the pre-charging flow times of the pixel unit;
determining a pre-charge flow value set according to the gray value range and the pre-charge flow times, wherein the pre-charge flow value set comprises a corresponding pre-charge flow value combination when the pixel unit is switched from any gray value in the gray value range to another gray value;
creating a precharge flow value table of the pixel unit according to the gray value range and the precharge flow value set;
the determining a pre-charge flow value combination according to the first gray scale value and the second gray scale value comprises:
and inquiring in the pre-charging current value table according to the first gray value and the second gray value to obtain a pre-charging current value combination corresponding to the first gray value and the second gray value.
2. The method of claim 1, wherein a plurality of sets of pre-charge current values are respectively associated with each on-state of the column signals, and driving the pixel units according to the state of the row signal, the state of the column signal and the pre-charge current value combination comprises:
when the state of the row signal is an on state, acquiring a plurality of switch states of the column signal;
sequentially determining a pre-charge flow value corresponding to the current on state of the column signal from the pre-charge flow value combination at each on state of the column signal;
and applying a first current to the column line to drive the pixel unit, wherein the first current is a current corresponding to a pre-charging current value corresponding to the current on state of the column signal.
3. The method of claim 1, after driving the pixel cell according to the state of the row signal, the state of the column signal, and the pre-charge flow value combination, comprising:
judging whether the display effect of the pixel unit reaches a preset target or not, and if the display effect of the pixel unit does not reach the preset target, adjusting a corresponding pre-charging flow value combination when the first gray value is switched to the second gray value;
and updating the current value set according to the adjusted precharge current value combination.
4. A circuit driving apparatus, wherein the circuit includes a row line, a column line, and a pixel cell connected to the row line and the column line, the row line generating a row signal for driving the pixel cell, the column line generating a column signal for driving the pixel cell, the apparatus comprising, in each row signal period:
the image display device comprises a first acquisition unit, a second acquisition unit and a display unit, wherein the first acquisition unit is used for acquiring a first gray value and a second gray value, the first gray value represents the gray value of the pixel unit in the previous frame image, and the second gray value is the gray value to be displayed of the pixel unit in the current frame image;
a first determining unit, configured to determine a pre-charge stream value combination according to the first gray scale value and the second gray scale value; wherein the precharge current value combination is used to determine the current output to the column line at each time;
a first driving unit for driving the pixel unit according to the state of the row signal, the state of the column signal and the pre-charge stream value;
wherein the apparatus comprises:
the second acquisition unit is used for acquiring the gray value range displayed by the pixel unit and the pre-charging flow times of the pixel unit before acquiring the first gray value and the second gray value;
a second determining unit, configured to determine a set of pre-charge stream values according to the gray value range and the number of times of pre-charge stream, where the set of pre-charge stream values includes a corresponding combination of pre-charge stream values when the pixel unit is switched from any gray value in the gray value range to another gray value;
a building unit, configured to create a precharge current value table of the pixel unit according to the gray value range and the precharge current value set;
the first determination unit includes: and the query module is used for querying in the precharge current value table according to the first gray value and the second gray value to obtain a precharge current value combination corresponding to the first gray value and the second gray value.
5. The apparatus of claim 4, wherein a plurality of sets of precharge current values respectively correspond to each of the on states of the column signals, and the first driving unit comprises:
the acquisition module is used for acquiring a plurality of switch states of the column signal when the state of the row signal is in an on state;
a determining module, configured to determine, in each on state of the column signal in turn, a pre-charge stream value corresponding to a current on state of the column signal from the pre-charge stream value combination;
and the driving module is used for driving the pixel unit according to a pre-charging flow value corresponding to the current on state of the column signal.
6. The apparatus of claim 4, wherein the apparatus comprises:
a judging unit, configured to judge whether a display effect of the pixel unit reaches a preset target after driving the pixel unit according to the state of the row signal, the state of the column signal, and the pre-charge current value combination, and adjust the pre-charge current value combination if the display effect of the pixel unit does not reach the preset target;
and the updating unit is used for updating the pre-charging current value table according to the adjusted pre-charging current value combination.
7. A computer-readable storage medium characterized in that the storage medium includes a stored program, wherein the program executes the circuit driving method according to any one of claims 1 to 3.
8. A processor, characterized in that the processor is configured to execute a program, wherein the program executes the circuit driving method according to any one of claims 1 to 3.
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| JP2007004035A (en) * | 2005-06-27 | 2007-01-11 | Toshiba Matsushita Display Technology Co Ltd | Active matrix display device and method of driving active matrix display device |
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| US8937632B2 (en) * | 2012-02-03 | 2015-01-20 | Ignis Innovation Inc. | Driving system for active-matrix displays |
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