CN110890065B - Control method and control device of display panel - Google Patents
Control method and control device of display panel Download PDFInfo
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- CN110890065B CN110890065B CN201911058689.2A CN201911058689A CN110890065B CN 110890065 B CN110890065 B CN 110890065B CN 201911058689 A CN201911058689 A CN 201911058689A CN 110890065 B CN110890065 B CN 110890065B
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/22—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources
- G09G3/30—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels
- G09G3/32—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED]
- G09G3/3208—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED]
- G09G3/3225—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters using controlled light sources using electroluminescent panels semiconductive, e.g. using light-emitting diodes [LED] organic, e.g. using organic light-emitting diodes [OLED] using an active matrix
Abstract
The application provides a control method and a control device of a display panel, wherein the control method comprises the following steps: scanning a target panel, and acquiring a compensation factor of each pixel unit in a target compensation area; acquiring a first driving voltage for driving the pixel unit in the target compensation area to emit light; acquiring a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage; and driving the pixel units in the target compensation area to emit light according to the second driving voltage. According to the compensation method and the compensation device, the compensation factors corresponding to the pixel units of the target panel are obtained before or during the work of the target panel, and the compensation driving voltage for driving the corresponding pixel units is obtained through the compensation factors and the received driving voltage, so that the driving voltage of the pixel units at each stage is the same, and the uniformity of the brightness of the product at the display stage is ensured.
Description
Technical Field
The present disclosure relates to the field of display, and in particular, to a control method and a control device for a display panel.
Background
In a driving circuit of an existing OLED display panel, due to instability of voltages at two sides of a storage capacitor in a corresponding pixel unit, driving voltages of the pixel unit in a writing stage and a light emitting stage are different, so that brightness of the pixel unit in the writing stage and the light emitting stage is inconsistent, and brightness uniformity of the panel is reduced.
Therefore, the present application proposes the following technical solutions based on this technical problem.
Disclosure of Invention
The application provides a control method and a control device of a display panel, which are used for realizing the brightness uniformity of the existing display panel.
In order to solve the above problems, the technical solution provided by the present application is as follows:
the application provides a control method of a display panel, which comprises the following steps:
scanning a target panel, and acquiring a compensation factor of each pixel unit in a target compensation area;
acquiring a first driving voltage for driving the pixel unit in the target compensation area to emit light;
acquiring a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage;
and driving the pixel units in the target compensation area to emit light according to the second driving voltage.
In the control method of the present application, before the step of obtaining the compensation factor of the gray-scale voltage of the pixel unit in the target compensation region, the method further includes:
and acquiring the gray scale voltage change rate corresponding to each pixel unit in the target compensation area.
In the control method of the present application, the target panel includes at least a first region;
the step of obtaining the gray scale voltage change rate corresponding to each pixel unit in the target compensation area comprises the following steps:
scanning the target panel, and taking the first area as a target compensation area;
acquiring a first gray scale voltage of each pixel unit in the target compensation area in a writing stage;
acquiring a second gray scale voltage of each pixel unit in the target compensation area in a light-emitting stage;
obtaining the gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area according to the first gray scale voltage and the second gray scale voltage,
wherein Ai is a ratio of the second gray scale voltage to the first gray scale voltage, and i is a positive integer.
In the control method of the present application, the step of obtaining the compensation factor of the gray-scale voltage of the pixel unit in the target compensation area includes:
scanning the target compensation area, and taking at least one pixel unit in the target compensation area as a target pixel unit;
obtaining an average value Ar of the gray scale voltage change rate of the target pixel unit;
and acquiring a compensation factor G1 of any pixel unit in the target compensation area as Ar/Ai according to the average value Ar of the gray scale voltage change rate of the target pixel unit.
In the control method of the present application, the target panel further includes a second area, and the control method of the target panel further includes:
obtaining gray scale voltage change rate Bi corresponding to each pixel unit in the second area;
scanning the second area, and taking at least one pixel unit in the second area as a target pixel unit;
obtaining the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area;
acquiring a compensation factor G2 ═ Br/Bi of any pixel unit in the second area according to the average value Br of the gray scale voltage change rate of the target pixel unit in the second area; or
And acquiring a compensation factor G2-Ar/Bi of any pixel unit in the second area according to the average value Ar of the gray scale voltage change rates of the target pixel unit in the first area.
The application also provides a control device of the display panel, which comprises a calculation module, a receiving module, a compensation module and a driving module;
the calculation module is used for scanning the target panel to obtain the compensation factors of all pixel units in the target compensation area;
the receiving module is used for acquiring a first driving voltage for driving the pixel unit in the target compensation area to emit light;
the compensation module is used for acquiring a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage;
the driving module is used for driving the pixel units in the target compensation area to emit light according to the second driving voltage.
The control device of the present application further includes:
and the acquisition module is used for acquiring the gray scale voltage change rate corresponding to each pixel unit in the target compensation area.
In the control apparatus of the present application,
the target panel comprises at least a first zone;
the acquisition module comprises a first scanning unit, a first acquisition unit, a second acquisition unit and a first calculation unit;
the first scanning unit is used for scanning the target panel and takes the first area as a target compensation area;
the first obtaining unit is used for obtaining a first gray scale voltage of each pixel unit in the target compensation area in a writing stage;
the first acquisition unit is used for acquiring a second gray scale voltage of each pixel unit in the target compensation area in a light-emitting stage;
the first calculating unit is used for acquiring the gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area according to the first gray scale voltage and the second gray scale voltage;
wherein Ai is a ratio of the second gray scale voltage to the first gray scale voltage, and i is a positive integer.
In the control device of the present application, the calculation module includes a second scanning unit, a third acquisition unit, and a second calculation unit;
the second scanning unit is used for scanning the target compensation area and taking at least one pixel unit in the target compensation area as a target pixel unit;
the third obtaining unit is used for obtaining an average value Ar of the gray scale voltage change rate of the target pixel unit;
the second calculating unit is configured to obtain a compensation factor G1 ═ Ar/Ai of any pixel unit in the target compensation area according to the average value Ar of the gray-scale voltage change rates of the target pixel unit.
In the control apparatus of the present application, the target panel further includes a second area;
the acquisition module is used for acquiring the gray scale voltage change rate Bi corresponding to each pixel unit in the second area;
the calculation module is configured to:
scanning the second area, and taking at least one pixel unit in the second area as a target pixel unit;
obtaining the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area;
acquiring a compensation factor G2 ═ Br/Bi of any pixel unit in the second area according to the average value Br of the gray scale voltage change rate of the target pixel unit in the second area; or
And acquiring a compensation factor G2 of any pixel unit in the second area as Ar/Bi according to the average value Ar of the gray scale voltage change rates of the target pixel unit in the first area.
Has the advantages that: according to the compensation method and the compensation device, the compensation factors corresponding to the pixel units of the target panel are obtained before or during the work of the target panel, and the compensation driving voltage for driving the corresponding pixel units is obtained through the compensation factors and the received driving voltage, so that the driving voltage of the pixel units at each stage is the same, and the uniformity of the brightness of the product at the display stage is ensured.
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 driving circuit of a display panel;
FIG. 2 is a flowchart illustrating a control method of a display panel according to the present application;
FIG. 3 is a schematic top view of a display panel according to the present application;
FIG. 4 is a first structural diagram of a display panel control device according to the present application;
fig. 5 is a second structural view of the display panel control device according to the present application.
Detailed Description
The following description of the various embodiments refers to the accompanying drawings, which are included to illustrate specific embodiments that can be implemented by the application. Directional phrases used in this application, such as [ upper ], [ lower ], [ front ], [ rear ], [ left ], [ right ], [ inner ], [ outer ], [ side ], etc., refer only to the directions of the attached drawings. Accordingly, the directional terminology is used for purposes of illustration and understanding, and is in no way limiting. In the drawings, elements having similar structures are denoted by the same reference numerals.
Referring to fig. 1, fig. 1 is a structural diagram of a conventional display panel driving circuit.
The description will be given by taking a conventional 2T1C drive as an example.
The driving circuit of the conventional display panel includes a first thin film transistor T1, a second thin film transistor T2, and a storage capacitor C. The first thin film transistor T1 is a switching TFT, and the second thin film transistor T2 is a driving TFT.
In the storage capacitor writing stage, the first thin film transistor T1 and the storage capacitor are in the charging stage, the constant voltage high level VDD and the constant voltage low level VSS form a loop, and the OLED light emitting device is in the light emitting state. When the first thin film transistor T1 is turned off, the storage capacitor C is in a charge holding state, the voltage is not changed, the second thin film transistor T2 is turned on, the constant voltage high level VDD and the constant voltage low level VSS form a loop, and the OLED light emitting device is in a light emitting state.
But may cause the G-point potential to be lowered due to the capacitive coupling effect at the moment the first thin film transistor T1 is turned off. Alternatively, there is leakage at the G point, resulting in a drop in the G point potential. All the above factors can cause that VGs of the storage capacitor is different in the charging and potential holding stages, which causes the brightness of the pixel unit in the writing stage and the lighting stage to be inconsistent, and reduces the brightness uniformity of the panel. The present application provides a control method and a control device for a display panel based on the above technical problems.
Referring to fig. 2, fig. 2 is a step diagram of a control method of a display panel according to the present application.
Referring to fig. 3, fig. 3 is a schematic top view of a display panel according to the present application.
The control method of the display panel comprises the following steps:
and S10, acquiring the gray scale voltage change rate corresponding to each pixel unit in the target compensation area.
The display panel at least comprises a first area 10, and at least one pixel unit is arranged in the first area 10. In this step, the gray scale voltage change rate corresponding to each pixel unit in the first region 10 is mainly obtained.
Step S10 may specifically include:
s101, scanning the target panel 100, and taking the first area 10 as a target compensation area;
s102, acquiring a first gray scale voltage of each pixel unit in the target compensation area in a writing stage;
s103, acquiring a second gray scale voltage of each pixel unit in the target compensation area in a light emitting stage;
s104, obtaining the gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area according to the first gray scale voltage and the second gray scale voltage;
in this step, the first region 10 is selected as the target compensation region on the display panel. The first region 10 may be any region of the target panel 100, and the present application is not particularly limited.
The present application is illustrated by taking the schematic diagram in fig. 3 as an example.
Three pixel cells a1, b1, c1 are disposed in the first region 10.
First, the first grayscale voltages Va1, Vb1, Vc1 of the driving circuits corresponding to the pixel cells a1, b1, c1 in the writing phase (storage capacitor charging phase) are obtained by a predetermined device. Second gray scale voltages Va2, Vb2 and Vc2 of the driving circuits corresponding to the pixel units a1, b1 and c1 in the light-emitting phase (storage capacitor potential holding phase) are obtained by the predetermined device. And finally, acquiring the gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area according to the acquired first gray scale voltage and the acquired second gray scale voltage.
The gray scale voltage change rate a1 of the pixel unit a1 is Va2/Va 1;
the gray-scale voltage change rate a2 of the pixel unit b1 is Vb2/Vb 1;
the gray scale voltage change rate A3 of the pixel unit c1 is Vc2/Vc 1;
in this embodiment, Ai is a ratio of the second gray scale voltage to the first gray scale voltage, and i is a positive integer.
S20, scanning the target panel 100, and acquiring the compensation factor of each pixel unit in the target compensation area;
step S20 may specifically include:
s201, scanning the target compensation area, and taking at least one pixel unit in the target compensation area as a target pixel unit;
s202, obtaining an average value Ar of gray scale voltage change rates of the target pixel unit;
and S203, acquiring a compensation factor G1 of any pixel unit in the target compensation area as Ar/Ai according to the average value Ar of the gray scale voltage change rate of the target pixel unit.
In this step, the first region 10 is used as the target compensation region, and at least one pixel unit in the first region 10 is used as a target pixel unit.
For example, the pixel cell a1 is taken as the target pixel cell, and the average Ar of the gray-scale voltage change rates of the pixel cell a1 is obtained. The average Ar of the gray scale voltage change rates of the target pixel unit in this embodiment is A1, i.e. Va2/Va 1.
Finally, according to the average value Ar of the gray-scale voltage change rates of the pixel unit a1, the compensation factor G1 ═ Ar/Ai of any pixel unit in the target compensation area is obtained.
The compensation factor Ga1 of the pixel cell a1 is a1/a1 is 1;
the compensation factor Gb1 of the pixel unit b1 is a1/a 2;
the compensation factor Gc1 of the pixel cell c1 is a 1/A3.
For example, when the pixel cell a1 and the pixel cell a2 are targeted, the average Ar of the gray-scale voltage change rates of the pixel cell a1 is obtained as (a1+ a 2)/2.
The compensation factor Ga1 of the pixel cell a1 is (a1+ a2)/2a 1;
compensation factor Gb1 of pixel unit b1 ═ (a1+ a2)/2a 2;
the compensation factor Gc1 of the pixel cell c1 is (a1+ a2)/2 A3.
Similarly, when the first area 10 includes more than three pixel units and the number of the target pixel units is three or more, the above rule is also satisfied.
S30, acquiring a first driving voltage for driving the pixel unit in the target compensation area to emit light;
s40, acquiring a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage;
in the present embodiment, steps S30 and S40 are mainly used to obtain the compensation driving voltage for driving the corresponding pixel unit.
Taking the schematic diagram in fig. 3 as an example, the first driving voltage (initial driving voltage) received by the pixel units a1, b1, and c1 is Vdate, and the compensated driving voltage received by the second thin film transistor T2 after compensation is:
the compensation driving voltage of the pixel unit a1 is Vdatea1 ═ Ga1 × Vdate;
the compensation driving voltage of the pixel unit b1 is Vdateb1 Gb1 Vdate;
the compensation driving voltage of the pixel unit c1 is Vdatec1 ═ Gc1 × Vdate;
s50, driving the pixel units in the target compensation area to emit light according to the second driving voltage;
the target panel 100 may also include other areas such as a second zone, a third zone, and so on.
After the compensation of each pixel unit in the first area 10 is completed, the present embodiment describes an example of performing compensation on the second area.
In this embodiment, the processing of each pixel unit in the second area is the same as that of the first area 10, and step S50 may specifically include:
s501, obtaining gray scale voltage change rates Bi corresponding to all pixel units in the second area;
s502, scanning the second area, and taking at least one pixel unit in the second area as a target pixel unit;
s503, obtaining the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area;
s504, obtaining a compensation factor G2 ═ Br/Bi of any pixel unit in the second area according to the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area;
on the basis of step S501, the pixel unit in the second area may also use the target pixel unit in the first area 10 as the target pixel unit of the second area;
step S50 may further include:
s505, obtaining a compensation factor G2 ═ Ar/Bi of any pixel cell in the second region according to the average value Ar of the gray-scale voltage change rates of the target pixel cells in the first region 10.
In the above embodiments, one pixel unit or more than one pixel unit may be disposed in the first region 10. When one pixel unit is disposed in the first region 10, only the gray scale voltage change rate of the pixel unit needs to be obtained, and the target display panel may perform compensation factor setting by using the pixel unit in the first region 10 as a target pixel unit.
The compensation factors of each pixel unit can be obtained through pixel simulation. Alternatively, the measurement is performed in real time during the display stage of the target panel 100, and the compensation is performed on each pixel unit in real time. The present application does not limit the acquisition method to the above two methods.
The application also provides a controller, wherein the controller is used for executing a plurality of instructions stored in the memory so as to realize the control method of the display panel.
The present application also provides a computer-readable storage medium having instructions stored therein, which, when run on a computer, cause the computer to perform the above-described control method of the display panel.
Referring to fig. 4, fig. 4 is a first structural diagram of a display panel control device according to the present application.
The control device of the display panel comprises an acquisition module 301, a calculation module 302, a receiving module 303, a compensation module 304 and a driving module 305.
In this embodiment, the obtaining module 301 is configured to obtain a gray-scale voltage change rate corresponding to each pixel unit in the target compensation region. The calculation module 302 is used for scanning the target panel 100 to obtain the compensation factor of each pixel unit in the target compensation area. The receiving module 303 is configured to obtain a first driving voltage for driving the pixel unit in the target compensation region to emit light. The compensation module 304 is configured to obtain a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage. The driving module 305 is configured to drive the pixel units in the target compensation area to emit light according to the second driving voltage.
In the control device of the present application, the target panel 100 includes at least a first region 10.
Referring to fig. 5, fig. 5 is a second structural diagram of the display panel control device of the present application.
The acquisition module 301 includes a first scanning unit 3011, a first acquisition unit 3012, a second acquisition unit 3013, and a first calculation unit 3014.
The first scanning unit 3011 is configured to scan the target panel 100, and use the first region 10 as a target compensation region; the first obtaining unit 3012 is configured to obtain a first grayscale voltage of each pixel unit in the target compensation region in a writing stage; the second obtaining unit 3013 is configured to obtain a second gray scale voltage of each pixel unit in the target compensation region in a light emitting phase; the first calculating unit 3014 is configured to obtain a gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation region according to the first gray scale voltage and the second gray scale voltage.
The first region 10 is first selected on the display panel by the first scanning unit 3011 as the target compensation region. The first region 10 may be any region of the target panel 100, and the present application is not particularly limited.
The present application is illustrated by taking the schematic diagram in fig. 3 as an example.
For example, three pixel cells a1, b1, c1 are disposed in the first region 10.
First, the first obtaining unit 3012 obtains the first grayscale voltages Va1, Vb1, Vc1 of the driving circuits corresponding to the pixel cells a1, b1, c1 in the writing phase (the storage capacitor charging phase). Second gray scale voltages Va2, Vb2 and Vc2 of the driving circuits corresponding to the pixel units a1, b1 and c1 in the light-emitting period (the storage capacitor potential holding period) are obtained by the second obtaining unit 3013. Finally, the gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area is obtained according to the first gray scale voltage and the second gray scale voltage obtained by the first calculation unit 3014.
The gray scale voltage change rate a1 of the pixel unit a1 is Va2/Va 1;
the gray-scale voltage change rate a2 of the pixel unit b1 is Vb2/Vb 1;
the gray scale voltage change rate A3 of the pixel unit c1 is Vc2/Vc 1;
in this embodiment, Ai is a ratio of the second gray scale voltage to the first gray scale voltage, and i is a positive integer.
Referring to fig. 5, the calculating module 302 includes a second scanning unit 3021, a third obtaining unit 3022, and a second calculating unit 3023.
The second scanning unit 3021 is configured to scan the target compensation region, and use at least one pixel unit in the target compensation region as a target pixel unit. The third obtaining unit 3022 is configured to obtain a mean value Ar of the gray-scale voltage change rate of the target pixel unit. The second calculating unit 3023 is configured to obtain a compensation factor G1 ═ Ar/Ai of any pixel unit in the target compensation region according to the average value Ar of the gray-scale voltage change rates of the target pixel unit.
In this embodiment, the first region 10 is used as the target compensation region, and at least one pixel unit in the first region 10 is used as a target pixel unit.
For example, the pixel cell a1 is taken as the target pixel cell, and the average value Ar of the gray-scale voltage change rate of the pixel cell a1 is acquired by the third acquiring unit 3022. The average Ar of the gray scale voltage change rates of the target pixel unit in this embodiment is A1, i.e. Va2/Va 1. And acquiring, by the second calculation unit 3023, a compensation factor G1 ═ Ar/Ai of any pixel unit in the target compensation region.
The compensation factor Ga1 of the pixel cell a1 is a1/a1 is 1;
the compensation factor Gb1 of the pixel unit b1 is a1/a 2;
the compensation factor Gc1 of the pixel cell c1 is a 1/A3.
For example, when the pixel cell a1 and the pixel cell a2 are targeted, the average Ar of the gray-scale voltage change rates of the pixel cell a1 is obtained as (a1+ a 2)/2.
The compensation factor Ga1 of the pixel cell a1 is (a1+ a2)/2a 1;
compensation factor Gb1 of pixel unit b1 ═ (a1+ a2)/2a 2;
the compensation factor Gc1 of the pixel cell c1 is (a1+ a2)/2 A3.
Similarly, when the first area 10 includes more than three pixel units and the number of the target pixel units is three or more, the above rule is also satisfied.
Taking the schematic diagram in fig. 3 as an example, the receiving module 303 receives the first driving voltage (initial driving voltage) of the pixel units a1, b1, and c1 as Vdate, and the compensation driving voltage obtained by the compensation module 304 after compensating the pixel units a1, b1, and c1 and received by the second thin film transistor T2 is:
the compensation driving voltage of the pixel unit a1 is Vdatea1 ═ Ga1 × Vdate;
the compensation driving voltage of the pixel unit b1 is Vdateb1 Gb1 Vdate;
the compensation driving voltage of the pixel unit c1 is Vdatec1 ═ Gc1 × Vdate.
In this embodiment, the target panel 100 may further include a second region.
After the compensation of each pixel unit in the first area 10 is completed, the embodiment will take the compensation of the second area as an example.
The obtaining module 301 may further be configured to obtain a gray-scale voltage change rate Bi corresponding to each pixel unit in the second region.
The calculating module 302 may be further configured to scan the second region, and use at least one pixel unit in the second region as a target pixel unit; obtaining the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area; and acquiring a compensation factor G2 & ltBr/Bi & gt of any pixel unit in the second area according to the average value Br of the gray scale voltage change rate of the target pixel unit in the second area.
Alternatively, the calculating module 302 may further obtain the compensation factor G2 ═ Ar/Bi of any pixel cell in the second region according to the average value Ar of the gray-scale voltage change rates of the target pixel cells in the first region 10.
The application provides a control method and a control device of a display panel, wherein the control method comprises the following steps: scanning a target panel, and acquiring a compensation factor of each pixel unit in a target compensation area; acquiring a first driving voltage for driving the pixel unit in the target compensation area to emit light; acquiring a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage; and driving the pixel units in the target compensation area to emit light according to the second driving voltage. According to the compensation method and the compensation device, the compensation factors corresponding to the pixel units of the target panel are obtained before or during the work of the target panel, and the compensation driving voltage for driving the corresponding pixel units is obtained through the compensation factors and the received driving voltage, so that the driving voltage of the pixel units at each stage is the same, and the uniformity of the brightness of the product at the display stage is ensured.
In summary, although the present application has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present application, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present application, so that the scope of the present application shall be determined by the appended claims.
Claims (4)
1. A control method of a display panel is used for controlling a target panel, and is characterized in that the target panel at least comprises a first area, and the control method of the display panel comprises the following steps:
acquiring the gray scale voltage change rate corresponding to each pixel unit in the target compensation area;
acquiring a compensation factor of each pixel unit in a target compensation area;
acquiring a first driving voltage for driving the pixel unit in the target compensation area to emit light;
acquiring a second driving voltage for driving the pixel unit in the target compensation area to emit light according to the compensation factor and the first driving voltage;
driving the pixel units in the target compensation area to emit light according to the second driving voltage;
the step of obtaining the gray scale voltage change rate corresponding to each pixel unit in the target compensation area comprises the following steps:
scanning the target panel, and taking the first area as a target compensation area;
acquiring a first gray scale voltage of each pixel unit in the target compensation area in a writing stage;
acquiring a second gray scale voltage of each pixel unit in the target compensation area in a light-emitting stage;
acquiring a gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area according to the first gray scale voltage and the second gray scale voltage;
the step of obtaining the compensation factor of the gray scale voltage of the pixel unit in the target compensation area comprises the following steps:
scanning the target compensation area, and taking at least one pixel unit in the target compensation area as a target pixel unit;
obtaining an average value Ar of the gray scale voltage change rate of the target pixel unit;
acquiring a compensation factor G1 of any pixel unit in the target compensation area as Ar/Ai according to the average value Ar of the gray scale voltage change rate of the target pixel unit;
wherein Ai is a ratio of the second gray scale voltage to the first gray scale voltage, and i is a positive integer.
2. The control method of the display panel according to claim 1, wherein the target panel further includes a second area, the control method of the display panel further comprising:
obtaining gray scale voltage change rate Bi corresponding to each pixel unit in the second area;
scanning the second area, and taking at least one pixel unit in the second area as a target pixel unit;
obtaining the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area;
acquiring a compensation factor G2 ═ Br/Bi of any pixel unit in the second area according to the average value Br of the gray scale voltage change rate of the target pixel unit in the second area; or
And acquiring a compensation factor G2-Ar/Bi of any pixel unit in the second area according to the average value Ar of the gray scale voltage change rates of the target pixel unit in the first area.
3. A control device of a display panel is used for controlling a target panel and is characterized by comprising an acquisition module, a calculation module, a receiving module, a compensation module and a driving module;
the acquisition module is used for acquiring gray scale voltage change rates corresponding to all pixel units in a target compensation area, the calculation module is used for scanning a target panel to acquire compensation factors of all pixel units in the target compensation area, the receiving module is used for acquiring first driving voltages for driving the pixel units in the target compensation area to emit light, the compensation module is used for acquiring second driving voltages for driving the pixel units in the target compensation area to emit light according to the compensation factors and the first driving voltages, and the driving module is used for driving the pixel units in the target compensation area to emit light according to the second driving voltages;
the target panel at least comprises a first area, the acquisition module comprises a first scanning unit, a first acquisition unit, a second acquisition unit and a first calculation unit, the first scanning unit is used for scanning the target panel, the first area is used as a target compensation area, the first acquisition unit is used for acquiring a first gray scale voltage of each pixel unit in the target compensation area in a writing-in stage, the first acquisition unit is used for acquiring a second gray scale voltage of each pixel unit in the target compensation area in a light-emitting stage, and the first calculation unit is used for acquiring a gray scale voltage change rate Ai corresponding to each pixel unit in the target compensation area according to the first gray scale voltage and the second gray scale voltage;
the calculation module comprises a second scanning unit, a third obtaining unit and a second calculation unit, wherein the second scanning unit is used for scanning the target compensation area, at least one pixel unit in the target compensation area is used as a target pixel unit, the third obtaining unit is used for obtaining an average value Ar of the gray scale voltage change rate of the target pixel unit, and the second calculation unit is used for obtaining a compensation factor G1 ═ Ar/Ai of any pixel unit in the target compensation area according to the average value Ar of the gray scale voltage change rate of the target pixel unit;
wherein Ai is a ratio of the second gray scale voltage to the first gray scale voltage, and i is a positive integer.
4. The apparatus for controlling a display panel according to claim 3, wherein the target panel further comprises a second region, and the obtaining module is configured to obtain a gray-scale voltage variation rate Bi corresponding to each pixel unit in the second region;
the calculation module is used for scanning the second area and taking at least one pixel unit in the second area as a target pixel unit; obtaining the mean value Br of the gray scale voltage change rate of the target pixel unit in the second area; acquiring a compensation factor G2 ═ Br/Bi of any pixel unit in the second area according to the average value Br of the gray scale voltage change rate of the target pixel unit in the second area; or
And acquiring a compensation factor G2 of any pixel unit in the second area as Ar/Bi according to the average value Ar of the gray scale voltage change rates of the target pixel unit in the first area.
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