CN111063295B - Driving device and driving method of light emitting diode array panel - Google Patents
Driving device and driving method of light emitting diode array panel Download PDFInfo
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- CN111063295B CN111063295B CN201911415590.3A CN201911415590A CN111063295B CN 111063295 B CN111063295 B CN 111063295B CN 201911415590 A CN201911415590 A CN 201911415590A CN 111063295 B CN111063295 B CN 111063295B
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- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—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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Abstract
The invention discloses a driving device and a driving method of a light emitting diode array panel, wherein the driving device comprises: acquiring a first service time of the light emitting diode array panel; searching a first data voltage compensation value according to the first use time; calculating a first gray scale voltage value of the light emitting diode array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value; and outputting the first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image. The invention can solve the problem of uneven luminous brightness of different areas of the display device caused by the drift of the threshold voltage Vth of the driving current Ids, thereby improving the uniformity of the luminous brightness of different areas.
Description
Technical Field
The invention relates to the technical field of display, in particular to a driving device and a driving method of a light emitting diode array panel.
Background
A Light Emitting Diode (LED) display device is composed of an array of pixels, each including a Light Emitting Diode and a pixel driving circuit for driving the Light Emitting Diode. As shown in fig. 1, a common pixel driving circuit is composed of a data writing Thin Film Transistor (TFT) T2, a driving Thin Film Transistor T1, a capacitor Cs, and the like. In general, the driving current Ids of the LED is large, so the driving thin film transistor T1 generally needs to use Indium Gallium Zinc Oxide (IGZO) semiconductor material, and for the transistor, the length and width directions of the channel can reflect the probability of carriers being captured during the migration process, when the width-to-length ratio is large, the threshold voltage Vth of the TFT is very easy to drift, and since the driving thin film transistor T1 is in the saturation region during operation, the driving current Ids is very easily affected by the drift of the threshold voltage Vth, so that the luminance of different regions of the display device is not uniform, thereby affecting the display effect.
Therefore, a new technical solution is needed to solve the above technical problems.
Disclosure of Invention
The embodiment of the invention provides a driving device and a driving method of a light-emitting diode array panel, which are used for improving the uniformity of the brightness of different areas of a display device.
The embodiment of the invention provides a driving method of a light emitting diode array panel, which comprises the following steps:
step A: acquiring a first service time of the light emitting diode array panel;
and B: searching a first data voltage compensation value according to the first use time;
and C: calculating a first gray scale voltage value of the light emitting diode array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value;
step D: and outputting the first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image.
In the driving method of the light emitting diode array panel of the present invention, the driving method further includes:
step E: and generating corresponding relation data of the second use time and the second data voltage compensation value.
In the driving method of the led array panel according to the present invention, the step E includes:
step e 1: recording the input time of the second gray scale voltage input to the pixel unit;
step e 2: calculating the second data voltage compensation value according to the input time and a preset aging model;
step e 3: and storing the corresponding relation data between the second use time and the second data voltage compensation value.
In the driving method of the led array panel according to the present invention, the step e2 includes:
step e 21: calculating the bearing voltage value of any pixel unit according to the input time;
step e 22: and calculating the second data voltage compensation value according to the bearing voltage value and the preset aging model.
In the driving method of the light emitting diode array panel of the present invention, the driving method further includes, after the step a:
step F: calculating the bearing voltage value of any pixel unit according to the first service time;
the step B comprises the following steps: and searching the first data voltage compensation value according to the bearing voltage value corresponding to the first service time.
An embodiment of the present invention further provides a driving apparatus for a light emitting diode array panel, including:
the acquisition module is used for acquiring first service time of the light-emitting diode array panel;
the searching module is used for searching a first data voltage compensation value according to the first using time;
the operation module is used for operating the first gray scale voltage value of the light emitting diode array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value;
and the output module is used for outputting the first gray scale voltage corresponding to the compensated gray scale voltage value to the pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display images.
In the driving apparatus of the light emitting diode array panel of the present invention, the driving apparatus further includes:
and the generating module is used for generating corresponding relation data of the second use time and the second data voltage compensation value.
In the driving apparatus of the light emitting diode array panel of the present invention, the generation module includes:
the recording module is used for recording the input time of the second gray scale voltage input to the pixel unit;
the first calculation module is used for calculating the second data voltage compensation value according to the input time and a preset aging model;
and the storage module is used for storing the corresponding relation data between the second service time and the second data voltage compensation value.
In the driving apparatus of the led array panel according to the present invention, the first calculating module is configured to calculate a voltage-bearing value of any one of the pixel units according to the input time and calculate the second data-voltage compensation value according to the voltage-bearing value and the preset aging model.
In the driving apparatus of the light emitting diode array panel of the present invention, the driving apparatus further includes:
the second calculation module is used for calculating the pressure-bearing voltage value of any pixel unit according to the first service time;
the searching module is used for searching the first data voltage compensation value according to the bearing voltage value corresponding to the first service time.
Compared with the prior art, the driving device and the driving method of the light-emitting diode array panel search the data voltage compensation value by obtaining the service time of the light-emitting diode array panel in the working process, and then input the gray scale voltage to the pixel unit through operation, so that the problem that the driving current Ids is influenced by the drift of the threshold voltage Vth to cause uneven light-emitting brightness of different regions of the display device is solved, and the uniformity of the light-emitting brightness of different regions is improved.
Meanwhile, the generation module is established by using the corresponding relation data of the time and data voltage compensation values, the problem of inaccurate pixel brightness deviation compensation caused by errors can be solved, and the uniformity and accuracy of compensation are improved.
Finally, compensation of threshold voltage, carrier mobility and light emitting diode recession of the driving transistor can be achieved by providing the first gray scale voltage of the compensated gray scale voltage value for each pixel unit, and therefore uniformity of display brightness of the light emitting diode driving panel in two dimensions of time and space is guaranteed.
In order to make the aforementioned and other objects of the present invention comprehensible, preferred embodiments accompanied with figures are described in detail below.
Drawings
In order to illustrate the embodiments or the technical solutions in the prior art more clearly, the drawings needed to be used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the invention, and it is obvious for a person skilled in the art that other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a diagram of a conventional pixel driving circuit;
fig. 2 is a flowchart of a driving method of an led array panel according to an embodiment of the invention;
fig. 3 is a flowchart of generating data of a corresponding relationship between a use time and a data voltage compensation value in a driving method of an led array panel according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a pixel compensation circuit of an LED array panel according to an embodiment of the present invention;
fig. 5 is a block diagram of a driving apparatus of an led array panel according to an embodiment of the invention;
fig. 6 is a block diagram of a generation module device of a driving device of an led array panel according to an embodiment of the present invention.
Detailed Description
For purposes of clarity, technical solutions and advantages of the present invention, the present invention will be described in further detail with reference to the accompanying drawings, wherein like reference numerals represent like elements, and the following description is based on the illustrated embodiments of the present invention and should not be construed as limiting the other embodiments of the present invention which are not described in detail herein. The word "embodiment" as used herein means an example, instance, or illustration. In addition, the articles "a" and "an" as used in this specification and the appended claims may generally be construed to mean "one or more" unless specified otherwise or clear from context to be directed to a singular form.
As shown in fig. 2, an embodiment of the present invention provides a driving method of a light emitting diode array panel, where the driving method includes:
s1: acquiring a first service time of the light emitting diode array panel;
the light emitting diode array panel comprises a micro LED and a MiniLED, and the first service time refers to the sum of the time for actually displaying an image from the factory of the light emitting diode array panel; for example, the sum of the time from the first power-on to the power-off, the time from the second power-on to the power-off, and the time from the nth power-on to the power-off.
S2: searching a first data voltage compensation value according to the first use time;
optionally, before leaving the factory, a corresponding relation table of the service time and the data voltage compensation value is established, and the first data voltage compensation value is searched according to the corresponding relation table;
optionally, a corresponding relation table may be established in the internet, the first data voltage compensation value is searched according to the corresponding relation table, and then data compensation is implemented by connecting the internet to output data;
optionally, a corresponding relation table of the real-time updated service time and the data voltage compensation value is established to implement data compensation.
S3: calculating a first gray scale voltage value of the light emitting diode array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value;
as shown in fig. 4, the first gray scale voltage value may be measured by the pickup unit 10.
Further, the relationship among the threshold voltage of the driving transistor, the driving current, and the mobility of carriers can be calculated according to the following formula (1):
when the driving transistor T1 is in the saturation region, the driving current Ids may be calculated using the following formula (1):
Ids＝1/2μCoxW/L(Vgs-|Vth|)2 (1)
where μ is the carrier mobility of the driving transistor T1, Cox is the capacitance of the gate oxide capacitance per unit area of the driving transistor T1, and is a fixed value, Vgs is the difference between the gate voltage (Vg) and the source voltage (Vs) of the driving transistor T1, W/L is the width-to-length ratio of the driving transistor DT, and is a fixed value, and Vth is the threshold voltage of the driving transistor T1.
S4: and outputting the first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image.
Specifically, firstly, by obtaining a first use time of the light emitting diode array panel, obtaining a gray scale voltage of the first use time or the brightness of the light emitting diode array panel, and searching a data voltage compensation value; then, the first gray scale voltage value of the light emitting diode array panel is calculated with the data voltage compensation value to obtain a compensated gray scale voltage value; and finally, outputting the first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image. Therefore, the compensation of the threshold voltage, the carrier mobility and the light emitting diode recession of the driving transistor can be realized by providing the first gray scale voltage of the compensated gray scale voltage value for each pixel unit, so that the uniformity of the display brightness of the light emitting diode driving panel in two dimensions of time and space is ensured.
In addition, the above-mentioned operation method for calculating the first gray scale voltage value of the led Array panel and the data voltage compensation value may be an FPGA (field Programmable Gate Array) operation, or other operation methods. The data voltage compensation value in the present invention includes a first data voltage compensation value and a second data voltage compensation value, and in the case that the present invention is not particularly limited, the data voltage compensation value may be the first voltage compensation value and/or the second voltage compensation value, which is not limited herein.
Optionally, in an embodiment of the present invention, the method for driving the led array panel further includes:
s5: and generating corresponding relation data of the second use time and the second data voltage compensation value.
Optionally, inputting related data before leaving a factory, and generating corresponding relation data of the second service time and the second data voltage compensation value; or, after the factory is shipped, the relevant data of the use time and the data voltage compensation value is input into the storage medium within the preset time, and a lookup table is generated. As shown in fig. 3, the step S5 in the method for driving the led array panel includes:
s51: recording the input time of the second gray scale voltage input to the pixel unit;
the input time may be the first usage time, the second usage time, or any usage time, which is not limited herein.
S52: calculating the second data voltage compensation value according to the input time and a preset aging model;
s53: and storing the corresponding relation data between the second use time and the second data voltage compensation value.
The preset aging model may be a light emitting diode aging model or a thin film transistor aging model, which is not limited herein.
Optionally, in an embodiment of the present invention, step S52 of the method for driving an array by using light emitting diodes includes:
s521: calculating the bearing voltage value of any pixel unit according to the input time;
s522: and calculating the second data voltage compensation value according to the bearing voltage value and the preset aging model.
Specifically, a pressure-bearing voltage value of any pixel of the use time is obtained through collection and calculation by a calculator and an accumulator inside a Timing Controller (TCON), wherein the counter records the use time and the write-in state of any pixel unit, and the accumulator accumulates a second gray scale voltage value and the write-in state in the use time to obtain an equation: s1 ═ 21+23…+22n-1)x1+(22+24+…+22n) x0, where s1 represents the voltage-bearing value of any one of the pixel units, x0 represents the second gray scale voltage writing state at zero gray scale, and x0 is 0; x1 represents the writing state of the second gray scale voltage of any gray scale except the zero gray scale, x1 is 1; 22n-1And 22nRepresenting the write time.
Optionally, the data of the correspondence between the usage time and the data voltage compensation value or the usage time and the voltage-bearing voltage value may be stored in a storage medium, where the usage time may be a first usage time and a second usage time, and except for a specific description, the storage medium is not limited in the present invention, and may be a DDR (double data synchronous dynamic random access memory) or other storage medium, which is not limited herein.
Further, in the method for driving the led array panel according to the embodiment of the present invention, after the step S1, the method further includes the following steps:
s6: calculating the bearing voltage value of any pixel unit according to the first service time;
step S2 includes: and searching the first data voltage compensation value according to the bearing voltage value corresponding to the first service time.
Specifically, the internal calculation unit calculates a voltage-bearing voltage value of any pixel unit corresponding to the first service time, and optionally, a corresponding lookup table is established according to the first service time and the voltage-bearing voltage value, or a lookup table corresponding to the first service time, the voltage-bearing voltage value and/or the data voltage compensation value is established.
As shown in fig. 4, in the embodiment of the present invention, a corresponding pixel compensation circuit is obtained according to the provided driving method of the light emitting diode. The pixel compensation circuit includes an acquisition unit 10 and an arithmetic unit 20.
Specifically, the collecting unit 10 is configured to collect a gray scale voltage or a voltage-bearing voltage of the light emitting diode LED, and the operation unit 20 is configured to determine a data voltage compensation value based on the gray scale voltage and an input time operation.
By acquiring the first grayscale voltage value or the confined voltage value of the pickup unit 10, the carrier mobility and the threshold voltage of the driving transistor T1 can be determined. The data voltage compensation value is determined according to the collected first gray scale voltage value or the collected pressure-bearing voltage value of the light-emitting diode, and then the data voltage compensation value is applied to each pixel unit, so that the display brightness of the whole light-emitting diode driving panel is improved, the problem that the brightness of different regions of the display device is uneven due to the fact that the driving current Ids is influenced by the drift of the threshold voltage Vth is solved, and the uniformity of the brightness of different regions of the display device is improved.
An embodiment of the present invention further provides a driving apparatus for a light emitting diode array panel, as shown in fig. 5, the driving apparatus includes:
an obtaining module 100, configured to obtain a first usage time of the led array panel;
the light emitting diode array panel comprises a micro LED and a MiniLED, and the first service time refers to the sum of the time for actually displaying an image from the factory of the light emitting diode array panel; for example, the sum of the time from the first power-on to the power-off, the time from the second power-on to the power-off, and the time from the nth power-on to the power-off.
The searching module 200 is configured to search for a first data voltage compensation value according to the first usage time;
optionally, before leaving the factory, a corresponding relation table of the service time and the data voltage compensation value is established, and the first data voltage compensation value is searched according to the corresponding relation table;
optionally, a corresponding relation table may be established in the internet, the first data voltage compensation value is searched according to the corresponding relation table, and then data compensation is implemented by connecting the internet to output data;
optionally, a corresponding relation table of the real-time updated service time and the data voltage compensation value is established to implement data compensation.
An operation module 300, configured to operate the first gray scale voltage value of the led array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value;
as shown in fig. 4, the first gray scale voltage value may be measured by the pickup unit 10.
Further, the relationship among the threshold voltage of the driving transistor, the driving current, and the mobility of carriers can be calculated according to the following formula (1):
when the driving transistor T1 is in the saturation region, the driving current Ids may be calculated using the following formula (1):
Ids＝1/2μCoxW/L(Vgs-|Vth|)2 (1)
where μ is the carrier mobility of the driving transistor T1, Cox is the capacitance of the gate oxide capacitance per unit area of the driving transistor T1, and is a fixed value, Vgs is the difference between the gate voltage (Vg) and the source voltage (Vs) of the driving transistor T1, W/L is the width-to-length ratio of the driving transistor DT, and is a fixed value, and Vth is the threshold voltage of the driving transistor T1.
The output module 400 is configured to output the first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the led array panel to drive the led array panel to display an image.
Specifically, firstly, by obtaining a first use time of the light emitting diode array panel, obtaining a gray scale voltage of the first use time or the brightness of the light emitting diode array panel, and searching a data voltage compensation value; then, the first gray scale voltage value of the light emitting diode array panel is calculated with the data voltage compensation value to obtain a compensated gray scale voltage value; and finally, outputting the first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image. Therefore, the compensation of the threshold voltage, the carrier mobility and the light emitting diode recession of the driving transistor can be realized by providing the first gray scale voltage of the compensated gray scale voltage value for each pixel unit, so that the uniformity of the display brightness of the light emitting diode driving panel in two dimensions of time and space is ensured.
In addition, the above-mentioned operation method for calculating the first gray scale voltage value of the led Array panel and the data voltage compensation value may be an FPGA (field Programmable Gate Array) operation, or other operation methods. The data voltage compensation value in the present invention includes a first data voltage compensation value and a second data voltage compensation value, and in the case that the present invention is not particularly limited, the data voltage compensation value may be the first voltage compensation value and/or the second voltage compensation value, which is not limited herein.
Optionally, as shown in fig. 6, the driving apparatus of the led array panel in the embodiment of the present invention further includes:
a generating module 500, configured to generate correspondence data between the second usage time and the second data voltage compensation value.
Optionally, inputting related data before leaving a factory, and generating corresponding relation data of the second service time and the second data voltage compensation value; or, after the factory is shipped, the relevant data of the use time and the data voltage compensation value is input into the storage medium within the preset time, and a lookup table is generated.
The generation module 500 includes:
a recording module 510 for recording an input time of the second gray scale voltage input to the pixel unit;
a first calculating module 520, configured to calculate the second data voltage compensation value according to the input time and a preset aging model;
a storage module 530, configured to store correspondence data between the second usage time and the second data voltage compensation value.
The preset aging model may be a light emitting diode aging model or a thin film transistor aging model, which is not limited herein.
Further, the first calculating module 520 is configured to calculate a voltage-bearing value of any one of the pixel units according to the input time and calculate the second data voltage compensation value according to the voltage-bearing value and the preset aging model.
Specifically, a pressure-bearing voltage value of any pixel of the use time is obtained through collection and calculation by a calculator and an accumulator inside a Timing Controller (TCON), wherein the counter records the use time and the write-in state of any pixel unit, and the accumulator accumulates a second gray scale voltage value and the write-in state in the use time to obtain an equation: s1 ═ 21+23…+22n-1)x1+(22+24+…+22n) x0, where s1 represents the voltage-bearing value of any one of the pixel units, x0 represents the second gray scale voltage writing state at zero gray scale, and x0 is 0; x1 represents the writing state of the second gray scale voltage of any gray scale except the zero gray scale, x1 is 1; 22n-1And 22nRepresenting the write time.
Optionally, the Data of the correspondence between the usage time and the Data voltage compensation value or the usage time and the bearing voltage value may be stored in a storage medium, where the usage time may be a first usage time and a second usage time, and except for specific descriptions, the storage medium is not limited in the present invention, and may be a DDR (Double Data synchronous dynamic random access memory) or other storage medium, which is not limited herein.
Optionally, the driving apparatus for driving a panel by using a light emitting diode according to an embodiment of the present invention further includes:
the second calculation module is used for calculating the bearing voltage value of any pixel unit according to the first service time;
the searching module is used for searching the first data voltage compensation value according to the bearing voltage value corresponding to the first service time.
Specifically, the internal calculation unit calculates a voltage-bearing voltage value of any pixel unit corresponding to the first service time, and optionally, a corresponding lookup table is established according to the first service time and the voltage-bearing voltage value, or a lookup table corresponding to the first service time, the voltage-bearing voltage value and/or the data voltage compensation value is established.
Compared with the prior art, the driving device and the driving method of the light-emitting diode array panel search the data voltage compensation value by obtaining the service time of the light-emitting diode array panel in the working process, and then input the gray scale voltage to the pixel unit through operation, so that the problem that the driving current Ids is influenced by the drift of the threshold voltage Vth to cause uneven light-emitting brightness of different regions of the display device is solved, and the uniformity of the light-emitting brightness of different regions is improved.
Meanwhile, the generation module is established by using the corresponding relation data of the time and data voltage compensation values, the problem of inaccurate pixel brightness deviation compensation caused by errors can be solved, and the uniformity and accuracy of compensation are improved.
Finally, compensation of threshold voltage, carrier mobility and light emitting diode recession of the driving transistor can be achieved by providing the first gray scale voltage of the compensated gray scale voltage value for each pixel unit, and therefore uniformity of display brightness of the light emitting diode driving panel in two dimensions of time and space is guaranteed.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (10)
1. A method of driving a light emitting diode array panel, comprising:
step A: acquiring a first service time of the light emitting diode array panel;
and B: searching a first data voltage compensation value according to the first use time;
the step B comprises the following steps: calculating a pressure-bearing voltage value of any pixel unit corresponding to the first service time, and establishing a corresponding lookup table according to the first service time and the pressure-bearing voltage value, or establishing a lookup table corresponding to the first service time, the pressure-bearing voltage value and/or the first data voltage compensation value;
wherein, the establishing of the corresponding lookup table according to the first service time and the bearing voltage value comprises: establishing a corresponding relation table of the real-time updated service time and the data voltage compensation value for realizing data compensation;
and C: calculating a first gray scale voltage value of the light emitting diode array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value;
step D: outputting a first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image;
the compensation of the threshold voltage, the carrier mobility and the recession of the light emitting diode can be realized by providing the first gray scale voltage of the compensated gray scale voltage value for each pixel unit, so that the uniformity of the display brightness of the light emitting diode driving panel in two dimensions of time and space is ensured.
2. The driving method of the light emitting diode array panel according to claim 1, further comprising:
step E: and generating corresponding relation data of the second use time and the second data voltage compensation value.
3. The method for driving the led array panel according to claim 2, wherein the step E comprises:
step e 1: recording the input time of the second gray scale voltage input to the pixel unit;
step e 2: calculating the second data voltage compensation value according to the input time and a preset aging model;
step e 3: and storing the corresponding relation data between the second use time and the second data voltage compensation value.
4. The method of driving a light emitting diode array panel according to claim 3, wherein the step e2 includes:
step e 21: calculating the bearing voltage value of any pixel unit according to the input time;
step e 22: and calculating the second data voltage compensation value according to the bearing voltage value and the preset aging model.
5. The method for driving the light emitting diode array panel according to claim 4, further comprising, after the step a:
step F: calculating the bearing voltage value of any pixel unit according to the first service time;
the step B comprises the following steps: and searching the first data voltage compensation value according to the bearing voltage value corresponding to the first service time.
6. A driving apparatus of a light emitting diode array panel, comprising:
the acquisition module is used for acquiring first service time of the light-emitting diode array panel;
the searching module is used for searching a first data voltage compensation value according to the first using time;
the searching module is used for searching a first data voltage compensation value according to the first using time and comprises the following steps:
the searching module is used for calculating a pressure-bearing voltage value of any pixel unit corresponding to the first service time, and establishing a corresponding searching table according to the first service time and the pressure-bearing voltage value, or establishing a searching table corresponding to the first service time, the pressure-bearing voltage value and/or the first data voltage compensation value;
wherein, the establishing of the corresponding lookup table according to the first service time and the bearing voltage value comprises: establishing a corresponding relation table of the real-time updated service time and the data voltage compensation value for realizing data compensation;
the operation module is used for operating the first gray scale voltage value of the light emitting diode array panel and the first data voltage compensation value to obtain a compensated gray scale voltage value;
the output module is used for outputting a first gray scale voltage corresponding to the compensated gray scale voltage value to a pixel unit of the light emitting diode array panel so as to drive the light emitting diode array panel to display an image;
the compensation of the threshold voltage, the carrier mobility and the recession of the light emitting diode can be realized by providing the first gray scale voltage of the compensated gray scale voltage value for each pixel unit, so that the uniformity of the display brightness of the light emitting diode driving panel in two dimensions of time and space is ensured.
7. The driving apparatus of the led array panel according to claim 6, further comprising:
and the generating module is used for generating corresponding relation data of the second use time and the second data voltage compensation value.
8. The apparatus for driving the led array panel according to claim 7, wherein the generating module comprises:
the recording module is used for recording the input time of the second gray scale voltage input to the pixel unit;
the first calculation module is used for calculating the second data voltage compensation value according to the input time and a preset aging model;
and the storage module is used for storing the corresponding relation data between the second service time and the second data voltage compensation value.
9. The apparatus of claim 8, wherein the first calculating module is configured to calculate a voltage-bearing value of any one of the pixel units according to the input time and to calculate the second data voltage compensation value according to the voltage-bearing value and the predetermined aging model.
10. The driving apparatus of the led array panel according to claim 9, further comprising:
the second calculation module is used for calculating the bearing voltage value of any pixel unit according to the first service time;
the searching module is used for searching the first data voltage compensation value according to the bearing voltage value corresponding to the first service time.
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| CN201911415590.3A CN111063295B (en) | 2019-12-31 | 2019-12-31 | Driving device and driving method of light emitting diode array panel |
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| CN201911415590.3A CN111063295B (en) | 2019-12-31 | 2019-12-31 | Driving device and driving method of light emitting diode array panel |
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| US6995519B2 (en) * | 2003-11-25 | 2006-02-07 | Eastman Kodak Company | OLED display with aging compensation |
| JP5160748B2 (en) * | 2005-11-09 | 2013-03-13 | 三星ディスプレイ株式會社 | Luminescent display device |
| US20080231557A1 (en) * | 2007-03-20 | 2008-09-25 | Leadis Technology, Inc. | Emission control in aged active matrix oled display using voltage ratio or current ratio |
| CA2692097A1 (en) * | 2010-02-04 | 2011-08-04 | Ignis Innovation Inc. | Extracting correlation curves for light emitting device |
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| US9064451B2 (en) * | 2012-02-01 | 2015-06-23 | Apple Inc. | Organic light emitting diode display having photodiodes |
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| US9837016B2 (en) * | 2013-06-27 | 2017-12-05 | Sharp Kabushiki Kaisha | Display device and drive method therefor |
| CN105989795A (en) * | 2015-02-03 | 2016-10-05 | 联想(北京)有限公司 | Screen color adjustment method and device |
| CN104867449B (en) * | 2015-05-29 | 2017-05-17 | 青岛海信电器股份有限公司 | Display and pixel compensation method thereof |
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| CN106504706B (en) * | 2017-01-05 | 2019-01-22 | 上海天马有机发光显示技术有限公司 | Organic light emitting display panel and pixel compensation method |
| CN106847175B (en) * | 2017-03-01 | 2018-12-28 | 京东方科技集团股份有限公司 | Electroluminescent display panel and its uniformity of luminance compensation process, system |
| CN106940984B (en) * | 2017-05-17 | 2019-12-13 | 上海天马有机发光显示技术有限公司 | organic light emitting display panel, driving method thereof and organic light emitting display device |
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| CN110232889B (en) * | 2019-05-09 | 2021-07-06 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit and display panel |
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