CN113823225B - Control method of display panel - Google Patents

Control method of display panel Download PDF

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Publication number
CN113823225B
CN113823225B CN202111304232.2A CN202111304232A CN113823225B CN 113823225 B CN113823225 B CN 113823225B CN 202111304232 A CN202111304232 A CN 202111304232A CN 113823225 B CN113823225 B CN 113823225B
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sub
display
pixels
data signal
signal group
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CN113823225A (en
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高志扬
张振松
高杰
徐朝哲
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Hefei Shiya Display Technology Co ltd
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Hefei Shiya Display Technology Co ltd
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    • G—PHYSICS
    • G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
    • G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
    • G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
    • G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
    • G09G3/22—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]
    • 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
    • G09G3/3258—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 with pixel circuitry controlling the voltage across the light-emitting element
    • 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
    • G09G2320/06—Adjustment of display parameters
    • G09G2320/0673—Adjustment of display parameters for control of gamma adjustment, e.g. selecting another gamma curve

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  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Computer Hardware Design (AREA)
  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The invention discloses a control method of a display panel, wherein the display panel comprises a display area and a temperature sensing area; the temperature sensing area comprises N sub-pixels, and N is equal to the gray scale quantity displayed by the display panel; each sub-pixel comprises an anode and a cathode, and the cathodes of the N sub-pixels are connected with each other; the control method comprises the following steps: step S1, setting the N sub-pixels to display different gray scales; step S2, under different temperatures, keeping the gray scale of the N sub-pixels unchanged, and acquiring a data signal group of the anode and a common signal of the cathode of the N sub-pixels; step S3, converting the data signal group into a display signal group; or converting the data signal group and the common signal into a display signal group; and step S4, storing the display signal group and the common signal under the plurality of different temperatures.

Description

Control method of display panel
Technical Field
The embodiment of the invention relates to the technical field of display, in particular to a control method of a display panel.
Background
Organic Light Emitting Diodes (OLEDs) have the characteristics of self-luminescence, fast response, wide color gamut, large viewing angle, high brightness, and the like, and can be used to manufacture thin display devices and flexible display devices, and are becoming the focus of research in the field of display technology at present.
The OLED device generates heat in the light emitting display process, or the current of the OLED device changes due to the change of the working environment, so that the brightness of a screen changes. If the screen working temperature range is 10-60 ℃, the maximum brightness and gamma of each temperature are required to be ensured to be the same. The prior art generally adopts the following two methods: the method comprises the following steps: the method comprises the steps of heating and cooling a screen according to a specified temperature, reading a cathode voltage value Vcom after the temperature is constant, then carrying out one-Time Process (OTP) according to the same gamma of the Vcom corresponding to a specific temperature, and finally writing the Vcom and the gamma corresponding to different temperatures into corresponding registers; the second method comprises the following steps: and (3) heating and cooling the screen according to the specified temperature, reading out Vcom values corresponding to different temperatures after the temperature is constant, fixing the screen at the specific temperature, performing OTP according to target brightness and gamma, and writing mapping relations of different temperatures and voltages obtained by part of products according to the first method into registers corresponding to all products. According to the method, all products which are successful in OTP can be ensured to reach the target specification, the products which are successful in OTP by using the method two can not meet the display requirement, but the time required by the method one is far longer than that required by the method two. Therefore, how to acquire the displayed data signal while considering both the time efficiency and the display effect is an urgent technical problem to be solved.
Disclosure of Invention
The invention provides a control method of a display panel, wherein the display panel comprises a display area and a temperature sensing area; the temperature sensing area comprises N sub-pixels, and N is equal to the gray scale quantity displayed by the display panel; each sub-pixel comprises an anode and a cathode, and the cathodes of the N sub-pixels are connected with each other;
the control method comprises the following steps:
step S1, setting the N sub-pixels to display different gray scales;
step S2, under different temperatures, keeping the gray scale of the N sub-pixels unchanged, and acquiring a data signal group of the anode and a common signal of the cathode of the N sub-pixels;
step S3, converting the data signal group into a display signal group; or converting the data signal group and the common signal into a display signal group;
and step S4, storing the display signal group and the common signal under the plurality of different temperatures.
The control method of the display panel provided by the embodiment of the invention is simple in display control method and can give consideration to both time efficiency and display effect.
Drawings
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention;
FIG. 2 is a schematic view taken along AA' of FIG. 1;
fig. 3 is a flowchart illustrating a control method for a display panel according to a first embodiment of the present invention;
FIG. 4 is a flowchart illustrating steps S2 and S3 of a method for controlling a display panel according to a second embodiment of the present invention;
FIG. 5 is a flowchart illustrating steps S2 and S3 of a method for controlling a display panel according to a third embodiment of the present invention;
FIG. 6 is a diagram illustrating a temperature versus voltage difference between a common signal at a cathode and a voltage at an anode according to an embodiment of the present invention;
fig. 7 is a flowchart illustrating another control method for a display panel according to an embodiment of the present invention.
Detailed Description
The present invention will be described in further detail with reference to the drawings and examples. It is to be understood that the specific embodiments described herein are merely illustrative of the invention and are not to be construed as limiting the invention. It should be further noted that, for the convenience of description, only some of the structures related to the present invention are shown in the drawings, not all of the structures.
Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present invention, and fig. 2 is a schematic diagram of a screenshot along AA' in fig. 1. As shown in fig. 1 and 2, the display panel includes a display area AA and a temperature sensing area T; the temperature sensing region T includes N sub-pixels, specifically, a sub-pixel TS1, sub-pixels TS2, … …, a sub-pixel TS (N-1), and a sub-pixel TSN, where N is equal to the number of gray scales to be displayed by the display panel. Each sub-pixel comprises an anode 11 and a cathode 12, the cathodes 12 of the N sub-pixels being interconnected. N is equal to the number of gray levels displayed by the display panel, for example, the display panel can display 256 gray levels in total, including 0 gray level to 255 gray levels, and N is equal to 256. The number of the sub-pixels in the temperature sensing area T may be greater than N or equal to N, and the invention is not limited thereto. The sub-pixels of the temperature sensing area T do not participate in the display, so the sub-pixels of the temperature sensing area T are generally displayed in a single color, for example, only a single blue color can be displayed.
Based on the structure of the display panel, an embodiment of the present invention provides a control method of a display panel, and fig. 3 is a flowchart illustrating the control method of the display panel according to the first embodiment of the present invention, as shown in fig. 3, the control method of the display panel according to the embodiment of the present invention includes:
and step S1, setting the N sub-pixels to display different gray scales. In one embodiment, as shown in fig. 1, the temperature sensing region T includes N sub-temperature sensing regions, such as sub-temperature sensing regions T1, T2, … …, T (N-1), TN, and the N sub-pixels are respectively located in the N sub-temperature sensing regions, but the invention is not limited thereto as long as the N sub-pixels display different gray scales.
For example, the Gray scale displayed by the display panel is Gray scale 0 to Gray scale 255, and the N sub-pixels are 256 sub-pixels, for example, the Gray scale corresponding to the first sub-pixel TS1 is the first Gray scale Gray1, the Gray scale corresponding to the second sub-pixel TS2 is the second Gray scale Gray2, … …, the Gray scale corresponding to the (N-1) th sub-pixel TS (N-1) is the (N-1) th Gray scale Gray 255, and the Gray scale corresponding to the nth sub-pixel TSN is the 0 Gray scale Gray 0.
Step S2, under different temperatures, keeping the gray scale of the N sub-pixels unchanged, and acquiring a data signal group of the anode and a common signal of the cathode of the N sub-pixels;
it should be noted that the gray scale displayed by one sub-pixel is kept unchanged, that is, the luminance of the sub-pixel is kept unchanged, that is, the driving current density of the sub-pixel is kept unchanged.
Step S3, converting the data signal group into a display signal group; or, converting the data signal group and the common signal into a display signal group;
and step S4, storing the display signal group and the common signal under the plurality of different temperatures.
Fig. 4 is a flowchart illustrating a step S2 and a step S3 of a control method of a display panel according to a second embodiment of the present invention, please refer to fig. 3 and 4, in the second embodiment, the step S2 includes:
step S21, at a first temperature, acquiring a first data signal group and a common signal, where the first data signal group includes N first data signals, and one first data signal corresponds to one sub-pixel.
Step S22, changing the temperature, keeping the gray scales of the N sub-pixels unchanged, keeping the common signal unchanged, and obtaining data adjustment signal groups of the N sub-pixels at different temperatures, where each data adjustment signal group includes N data adjustment signals, and one data adjustment signal corresponds to one sub-pixel.
In step S21, a first data signal group and a common signal of the N sub-pixels are obtained at a first temperature, and with reference to fig. 2 and 3, the data signal is loaded on the anode of the sub-pixel, the data signal is a data voltage signal, the common signal is loaded on the cathode, and the common signal is a common voltage signal. The first data signal group comprises N first data signals, and one data signal corresponds to one sub-pixel, namely, a data signal required by one sub-pixel when displaying own gray scale.
The first temperature may be a current ambient temperature (room temperature), or may be other temperatures, which is not limited in the embodiment of the present invention.
Further, different sub-pixels display different gray scales, and the first data signals of the different sub-pixels under the same display requirement (e.g. under the same white-state brightness, the same Gamma value, and the same color coordinate) are different, so that at the first temperature, the first data signals of the N sub-pixels, i.e. the first data signal group Vdata (1) of the N sub-pixels, needs to be acquired, where the first data signal group Vdata (1) includes N first data signals Vdata (1)1, Vdata (1)2, … …, Vdata (1) (N-1), Vdata (1) N. One first data signal corresponds to one sub-pixel, that is, Vdata (1)1 is a first data signal required by the gray scale displayed by the first sub-pixel, Vdata (1)2 is a first data signal required by the gray scale displayed by the second sub-pixel, … …, and Vdata (1) N is a first data signal required by the gray scale displayed by the nth sub-pixel. Further, at the first temperature, the first data signal group of the N sub-pixels is obtained, which may be specifically implemented in a parameter assignment manner or implemented in a parameter debugging manner, so as to satisfy the display effect of each sub-pixel at the first temperature and under the preset display requirement.
It should be noted that, in the embodiment of the present invention, a manner of obtaining the first data signal group of the N sub-pixels at the first temperature is not limited, for example, the first data signal group may be obtained by the above-mentioned parameter assignment or parameter debugging manner, and may also be obtained by other manners known to those skilled in the art, which is not limited in the embodiment of the present invention.
Further, in the embodiment of the present invention, the first data signal group Vdate (1) may be used as a reference value or standard value of the data signal group at other subsequent temperatures, and the data signal group at other subsequent temperatures may be determined based on the first data signal group Vdate (1) at the first temperature.
In step S22, when the temperature is changed, the common signal is kept unchanged, and in the case where the common signal is unchanged, data adjustment signal groups of N sub-pixels at a current temperature different from the first temperature are acquired.
When the temperature changes, the data signal of the sub-pixel will change to maintain the gray scale of the display. For how to acquire data signals under different gray scales after temperature change, the prior art can adopt, for example, the method one or the method two mentioned in the background art to determine data voltages under different temperatures, but when adopting the scheme of the method one, when the temperature changes, OTP is performed after the temperature is determined to be stable, and the time cost is high; multiple times of OTP are required according to different temperatures, and the operation is complex; when the scheme of the second method is adopted, OTP is carried out on cathode voltages corresponding to different temperatures at the same temperature, and the current temperature is not consistent with the cathode voltage during OTP, so that the precision problem exists; and the OTP is required to be carried out for a plurality of times according to different temperatures, so that the operation is complex.
The embodiment of the invention creatively keeps the gray scales displayed by the N sub-pixels unchanged when the temperature changes, namely keeps the respective luminous brightness of the N sub-pixels unchanged, and determines the data adjusting signal group delta Vdata (t) of the N sub-pixels, wherein the data adjusting signal group is the N data voltage change values corresponding to the gray scales displayed by the N sub-pixels unchanged. The data adjustment signal group Δ Vdata (t) includes N data adjustment signals Δ Vdata (t)1, Δ Vdata (t)2, … …, Δ Vdata (t) (N-1), and Δ Vdata (t) N corresponding to the first data signal group Vdata (1). One data adjustment signal corresponds to one sub-pixel, i.e., one gray level. For example, Δ vdata (t)1 is a change value of the data voltage of the subpixel TS1 after changing from the first temperature to the current temperature while maintaining the gray scale; Δ vdata (t)2 is the change value of the data voltage of the subpixel TS2 after changing from the first temperature to the current temperature with the gray scale unchanged, … …, and Δ vdata (t) N is the change value of the data voltage of the subpixel TSN after changing from the first temperature to the current temperature with the gray scale unchanged.
For example, when the current temperature is the second temperature, the data adjustment signal group Δ Vdata (2) may include N data adjustment signals Δ Vdata (2)1, Δ Vdata (2)2, Δ Vdata (2)3, … …, and Δ Vdata (2) N, one data adjustment signal corresponds to one sub-temperature sensing region, i.e., one gray scale, for example, Δ Vdata (2)1 is a change value of the data voltage of the first sub-temperature sensing region TS1 when the gray scale is maintained, and Δ Vdata (2)2 is a change value of the data voltage of the second sub-pixel TS2 when the first temperature is changed to the second temperature, and … … is a change value of the data voltage when the first temperature is changed to the second temperature, and Δ Vdata (2) N is a change value of the data voltage when the first temperature is changed to the second temperature.
Similarly, when the current temperature is the third temperature and the data adjustment signal group Δ Vdata (3) is the gray scale displayed by each of the N subpixels is kept unchanged, the temperature changes from the first temperature to the third temperature, and then the corresponding N data voltage change values are obtained; when the current temperature is the fourth temperature and the data adjustment signal group Δ Vdata (4) is the gray scale displayed by each of the N subpixels is kept unchanged, the temperature changes from the first temperature to the fourth temperature, and then the corresponding N data voltage change values are obtained. The data adjustment signal group Δ vdata (t) is a variation value with respect to the first data signal group Vdate (1). And changing the temperature for multiple times, repeating the operation, and respectively acquiring the data adjusting signal groups of the N sub-pixels at different temperatures until the required data adjusting signal groups at all temperatures are acquired. In step S2, the common signal is uniformly maintained.
Referring next to fig. 4, in a second embodiment, the step S3 converts the data signal group into a display signal group; or converting the data signal group and the common signal into a display signal group, including:
step S31, determining a first display data signal group at the first temperature according to a display mode and the first display data signal group, wherein the first display data signal group includes N first display data signals, and one first display data signal corresponds to one gray scale;
step S32, determining display data signal groups at different temperatures according to the first display data signal group and the data modulation signal groups at different temperatures, where each display data signal group includes N display data signals, and one display data signal corresponds to one gray scale.
In step S31, specifically, the display mode may include a monochrome display and a color display, where the monochrome display may be understood as a single color display, such as a single red display, a single blue display, or a single green display, and the like, and the display color of the single display is not limited in the embodiments of the present invention. Color display is understood to mean a display mode in which at least two display colors cooperate to realize color display, for example, a display mode in which color display is realized by a combination of red display, blue display, and green display.
Further, the determination manner of the first display data signal group is different in different display modes, and the following description is made in detail.
When the display mode is monochrome display, the temperature sensing region and the display region are displayed in the same monochrome, so the first display data signal group Vdisplay (1) is the same as the first data signal group Vdata (1), that is, the first data signal group Vdata (1) obtained in the step S2 can be used as the first display data signal group Vdisplay (1). The first display data signal group Vdisplay (1) includes N first display data signals Vdisplay (1)1, Vdisplay (1)2, … …, Vdisplay (1) (N-1), Vdisplay (1) N, one first display data signal corresponds to one Gray scale, for example, Vdisplay (1)1 is a first display data signal required by the first Gray scale Gray1 at a first temperature, Vdisplay (1)2 is a first display data signal required by the second Gray scale 2 at the first temperature, and … …, Vdisplay (1) N is a first display data signal required by the nth Gray scale 0 at the first temperature.
When the display mode is color display, since the temperature sensing area is single color display, the first data signal group Vdata (1) obtained in the step S2 corresponds to only one data signal group in one display color, and the display area needs a display data signal obtained by combining a plurality of different display colors, therefore, when the display mode is color display, a one-time operation process needs to be performed according to the first data signal group to determine the first display data signal group of the sub-pixel in the display area.
Specifically, the one-time operation process (OTP) may be understood as an operation in which the luminance and color coordinates of the white state at different gray scales are known, the color coordinates of the sub-pixels of different colors (e.g., RGB) are known, and the display data signal values of the sub-pixels of different colors (e.g., RGB) at each gray scale are solved. It should be noted that, the operation results of the OTP are different under different environments and different display requirements (for example, different values of white luminance, Gamma value, and color coordinate), and the embodiment of the present invention does not limit the operation results of the OTP, and only needs to ensure that the first display data signal group Vdisplay is obtained by operating according to the first data signal group Vdata in the color display mode. In an embodiment of the invention, the white luminance may be a maximum white luminance, the Gamma value may be 2.2, and both the x value and the y value in the color coordinate are set values, for example, CIE (x, y) ═ CIE (0.3 ), further, corresponding to the first data set Vdata, the first display data set Vdisplay (1) may include N first display data signals Vdisplay (1)1, Vdisplay (1)2, … …, Vdisplay (1) (N-1), Vdisplay (1) N, one first display data signal corresponding to one Gray scale, for example, Vdisplay (1)1 is a first display data signal required by the first Gray scale 1 at a first temperature, isplay (1)2 is a first display data signal required by the second Gray scale 2 at the first temperature, Vdisplay (1) … …, isplay (1) (N-1) is a first display data signal required by the second Gray scale 2 at the first temperature, Vdisplay (N-1) is a first display data signal at the first temperature of 255, vdisplay (1) N is a first display data signal required for a zero Gray level Gray 0 at a first temperature.
Further, the first display data signal group Vdisplay (1) in the embodiment of the invention may be used as a reference value or standard value of the display data signal groups at other subsequent temperatures, and the display data signal groups at other subsequent temperatures may be determined based on the first display data signal group Vdisplay (1) at the first temperature.
In step S32, a display data signal group Vdisplay (t) at different temperatures is determined according to the first display data signal group Vdisplay (1) and the data modulation signal group Δ vdata (t) at different temperatures. Specifically, a display data signal set Vdisplay (t) with a specific temperature may be determined by summing the first display data signal set Vdisplay (1) and the data adjustment signal set Δ vdata (t) with the temperature, so that, corresponding to the first display data signal set Vdisplay (1) and the data adjustment signal set Δ vdata (t), a display data signal set Vdisplay (t) with a specific temperature includes N display data signals, one display data signal corresponds to one Gray scale, for example, Vdisplay (t)1 is a display data signal required by the first Gray scale Gray1 at the specific temperature, and Vdisplay (t)1 has a value of Vdisplay (1)1 plus Δ vdata (t) 1; vdisplay (t)2 is a display data signal required by the second Gray level Gray2 at the specific temperature, and the value of Vdisplay (t)2 is determined by Vdisplay (1)2 plus Δ vdata (t) 2; … …, Vdispllay (t) (N-1) is the display data signal required by the (N-1) th Gray level Gray 255 at the current temperature, Vdispllay (t) N is the display data signal required by the zero Gray level Gray 0 at the current temperature, and the value of Vdispllay (t) N is determined by adding delta Vdata (t) to Vdispllay (1) N.
For example, if the current temperature is the second temperature, the display data signal group Vdisplay (2) at the second temperature includes N display data signals, one display data signal corresponds to one Gray scale, for example, Vdisplay (2)1 is a display data signal required by the first Gray scale Gray1 at the second temperature, and the value of Vdisplay (2)1 is determined by adding Δ Vdata (2)1 to Vdisplay (1) 1; vdisplay (2)2 is a display data signal required by the second Gray scale Gray2 at the second temperature, and the value of Vdisplay (2)2 is determined by adding delta Vdata (2)2 to Vdisplay (1) 2; … …, Vdispllay (2) (N-1) is a display data signal required by the (N-1) th Gray level Gray 255 at the second temperature, the value of Vdispllay (2) (N-1) is determined by Vdispllay (1) (N-1) plus Δ Vdata (2) (N-1), Vdispllay (2) N is a display data signal required by the zero Gray level Gray 0 at the second temperature, and the value of Vdispllay (2) N is determined by Vdispllay (1) N plus Δ Vdata (2) N.
Then, step S4 is executed to store the display signal sets and the common signal at the plurality of different temperatures.
And storing the display data signal groups of the sub-pixels in the display area at different temperatures obtained in the step, and burning the display data signal groups to a register, so that when the temperature changes, the display data signal groups corresponding to different gray scales at different temperatures can be directly called according to the burning information in the register. Since the common signal remains constant at all times as the temperature changes, the same common signal is used for the displays at different temperatures.
To sum up, the control method of the display panel according to the embodiment of the invention sets N sub-pixels in the temperature sensing area, where N is equal to the number of display gray scales of the display panel, and the gray scales displayed by the N sub-pixels are different, then obtains the first data signal group of the N sub-pixels at the first temperature, then determines the first display data signal group of the sub-pixels in the display area at the first temperature according to the display mode and the first data signal group, and uses the first data display voltage group as the reference display data signal group, when the subsequent temperature changes, determines the data adjustment signal group of the N sub-pixels through the unchanged gray scales of the N sub-pixels, and further determines the display data signal groups of the sub-pixels in the display area at different temperatures according to the first display data signal group and the data adjustment signal group, stores and burns the display data signal groups of the sub-pixels in the display area at different gray scales at different temperatures into the register, therefore, display data signal groups under different gray scales at different temperatures stored in the register can be directly called in the subsequent display process, so that the display response is ensured to be rapid, and the display effect is good; meanwhile, the control method of the display panel provided by the embodiment of the invention only needs to perform OTP operation once at most according to the display mode, the OTP operation is simple, the display control method is simple, and both the time efficiency and the display effect can be considered.
In addition to the above embodiments, the common signal of the cathode in the sub-pixel is kept constant, and the common signal of the cathode is changed and not changed when the temperature is changed will be described below.
Fig. 5 is a flowchart illustrating steps S2 and S3 of a control method for a display panel according to a third embodiment of the present invention, and with reference to fig. 3 and 5, step S2 of the control method for a display panel according to the embodiment of the present invention includes:
step S21, acquiring a first data signal group and a first common signal at a first temperature, wherein the first data signal group comprises N first data signals, and one first data signal corresponds to one sub-pixel;
step S22, changing the temperature, keeping the gray scale of the N sub-pixels unchanged, changing the first common signal, and obtaining data adjustment signal groups and common adjustment signals of the N sub-pixels at different temperatures, where each data adjustment signal group includes N data adjustment signals, and one data adjustment signal corresponds to one sub-pixel.
In step S21, different sub-pixels display different gray scales, and the first data signals of the different sub-pixels under the same display requirement (e.g., under the same white luminance, the same Gamma value, and the same color coordinate) are different, so that at the first temperature, the first data signal group Vdata (1) of the N sub-pixels needs to be acquired, wherein the first data signal group Vdata (1) includes N first data signals Vdata (1)1, Vdata (1)2, … …, Vdata (1) (N-1), and Vdata (1) N. One first data signal corresponds to one sub-pixel, namely, Vdata (1)1 is a first data signal required by the gray scale displayed by the first sub-pixel, Vdata (1)2 is a first data signal required by the gray scale displayed by the second sub-pixel, and … …, and Vdata (1) N is a first data signal required by the gray scale displayed by the nth sub-pixel. Further, at the first temperature, the first data signal group of the N sub-pixels is obtained, which may be specifically implemented in a parameter assignment manner or implemented in a parameter debugging manner, so as to satisfy the display effect of each sub-pixel at the first temperature and under the preset display requirement.
The first common signal Vcom (1) at the first temperature may be set according to actual conditions, and specific values are not limited in the embodiment of the present invention. Generally, the temperature sensing regions share a common signal, and thus the first common signal Vcom (1) may be determined by any one of the sub-pixels.
In step S22, under the condition that the temperature is changed and the gray scale of the N sub-pixels is kept unchanged, the data adjustment signal groups Δ vdata (t) of the N sub-pixels at different temperatures are obtained. In step S22, while changing the temperature, the first common signal is changed to obtain the common adjustment signal Δ vcom (t) at different temperatures while keeping the gray levels of the N sub-pixels unchanged. In step S22, the data adjustment signal set Δ vdata (t) at a specific temperature includes N data adjustment signals, and the common adjustment signals Δ vcom (t) of N sub-pixels are the same because the cathodes of N sub-pixels are connected to each other. The data adjustment signal groups Δ vdata (t) and Δ vcom (t) are N data voltage change values and one common adjustment signal corresponding to the N data voltage change values while the gray scales displayed by the N sub-pixels are kept unchanged.
The data adjustment signal group Δ Vdata (t) includes N data adjustment signals Δ Vdata (t)1, Δ Vdata (t)2, … …, Δ Vdata (t) (N-1), and Δ Vdata (t) N corresponding to the first data signal group Vdata (1). One data adjustment signal corresponds to one sub-pixel, i.e., one gray level. For example, Δ vdata (t)1 is a change value of the data voltage of the subpixel TS1 after changing from the first temperature to the current temperature while maintaining the gray scale; Δ vdata (t)2 is a change value of the data voltage of the subpixel TS2 when the gray scale is kept unchanged, and the change value is changed from the first temperature to the current temperature, … …, and Δ vdata (t) N is a change value of the data voltage of the subpixel TSN when the gray scale is kept unchanged, and the change value is changed from the first temperature to the current temperature; meanwhile, the common adjustment signal of the N sub-pixels is Δ vcom (t).
For example, if the current temperature is the second temperature, the data adjustment signal group Δ Vdata (2) may include N data adjustment signals Δ Vdata (2)1, Δ Vdata (2)2, Δ Vdata (2)3, … …, and Δ Vdata (2) N, one data adjustment signal corresponds to one sub-temperature sensing region, i.e., one gray scale, for example, Δ Vdata (2)1 is a change value of the data voltage of the first sub-temperature sensing region TS1 when the gray scale is maintained, Δ Vdata (2)2 is a change value of the data voltage of the second sub-pixel TS2 when the first temperature is changed to the second temperature, … … is a change value of the data voltage when the first temperature is changed to the second temperature, and Δ Vdata (2) N is a change value of the data voltage of the nth sub-pixel TSN when the first temperature is changed to the second temperature. Meanwhile, the common adjustment signal of the N subpixels is Δ Vcom (1).
Similarly, when the current temperature is the third temperature, the data adjustment signal group Δ Vdata (3) is N data voltage change values corresponding to the temperature change from the first temperature to the third temperature while keeping the gray scales displayed by the N sub-pixels unchanged, and meanwhile, the common adjustment signal of the N sub-pixels is Δ Vcom (3). When the current temperature is the fourth temperature, the data adjustment signal group Δ Vdata (4) is the gray scale that is maintained to be displayed by each of the N sub-pixels, and the temperature changes from the first temperature to the fourth temperature, the corresponding N data voltage change values, and meanwhile, the common adjustment signal of the N sub-pixels is Δ Vcom (4). The data adjustment signal groups Δ vdata (t) are all variation values with respect to the first data signal group Vdate (1), and the common adjustment signals Δ Vcom (t) are all variation values with respect to the first common signal Vcom (1). And changing the temperature for multiple times, and repeating the above operations to respectively acquire the data adjustment signal group delta Vdata (t) and the common adjustment signal delta Vcom (t) of the N sub-pixels at different temperatures until the required data adjustment signal group and common adjustment signal at each temperature are acquired.
In the third embodiment, the variation amplitude of each data adjustment signal in the data adjustment signal group Δ vdata (t) is reduced compared to the second embodiment. Specifically, please refer to fig. 6. FIG. 6 is a schematic diagram of the correspondence between the voltage difference between the common signal at the cathode and the voltage at the anode and the temperature, specifically, the current density at the sub-pixel is 20mA/cm2The corresponding relation between the voltage difference between the common signal and the anode and the temperature is shown in the following schematic diagram. As can be understood from fig. 6, as the temperature increases, the voltage difference between the cathode and the anode becomes smaller. That is, the gray scale of the sub-pixel is maintained, and the voltage difference between the cathode and the anode needs to be changed with the temperature change. In the second embodiment, only the data signal on the anode is adjusted, and there is a high possibility that the adjustment fails because the adjustment amount of the data voltage is large and exceeds the adjustment range of the data voltage on the anode. For example, at 20 ℃, the voltage difference between the cathode and the anode is 5.5V, at 70 ℃, the voltage difference between the cathode and the anode is 4.6V, and if the common signal of the cathode is kept unchanged and only the data signal of the anode is changed, the data adjustment signal on the anode is 0.9V. In the third embodiment, after the temperature is changed, the data signal of the anode and the common signal of the cathode are changed at the same gray level, and if the change amount of the common signal of the cathode is Δ V1, the data adjustment signal of the anode is Δ V2, Δ V1 plus Δ V2 is equal to 0.9V, and the data adjustment signal of the anode is decreased from 0.9V to (0.9V- Δ V1), the adjustment amount of the data adjustment signal of the anode is decreased.
Referring next to fig. 5, step S3 of the method for controlling a display panel according to the third embodiment of the present invention includes:
step S31, determining a first display data signal group at the first temperature according to a display mode and the first display data signal group, wherein the first display data signal group includes N first display data signals, and one first display data signal corresponds to one gray scale;
step S32, determining display data signal groups at different temperatures according to the first display data signal group and the data adjusting signal groups at different temperatures, wherein each display data signal group comprises N display data signals, and one display data signal corresponds to one gray scale;
step S33, according to the first common signal and the common adjusting signal under different temperatures, common signals under different temperatures are determined, and one common signal corresponds to one gray scale.
Specifically, in step S31, the first display data signal group Vdisplay (1) of the sub-pixel in the display area at the first temperature may be determined according to the display mode and the first data signal group Vdata (1), and the determination manner is the same as the determination manner described in the foregoing embodiment, and is not repeated here.
In step S32, a display data signal set Vdisplay (t) at different temperatures is determined according to the first display data signal set Vdisplay (1) and the data modulation signal set Δ vdata (t) at different temperatures. Specifically, a display data signal set Vdisplay (t) with a specific temperature may be determined by summing the first display data signal set Vdisplay (1) and the data adjustment signal set Δ vdata (t) with the temperature, so that, corresponding to the first display data signal set Vdisplay (1) and the data adjustment signal set Δ vdata (t), a display data signal set Vdisplay (t) with a specific temperature includes N display data signals, one display data signal corresponds to one Gray scale, for example, Vdisplay (t)1 is a display data signal required by the first Gray scale Gray1 at the specific temperature, and Vdisplay (t)1 has a value of Vdisplay (1)1 plus Δ vdata (t) 1; vdisplay (t)2 is a display data signal required by the second Gray level Gray2 at the specific temperature, and the value of Vdisplay (t)2 is determined by Vdisplay (1)2 plus Δ vdata (t) 2; … …, Vdispllay (t) N is the display data signal required by the Nth Gray level Gray 0 at the current temperature, and the value of Vdispllay (t) N is determined by Vdispllay (1) N plus Δ Vdata (t) N.
For example, if the current temperature is the second temperature, the display data signal group Vdisplay (2) at the second temperature includes N display data signals, one display data signal corresponds to one Gray scale, for example, Vdisplay (2)1 is a display data signal required by the first Gray scale Gray1 at the second temperature, and the value of Vdisplay (2)1 is determined by adding Δ Vdata (2)1 to Vdisplay (1) 1; vdisplay (2)2 is a display data signal required by the second Gray scale Gray2 at the second temperature, and the value of Vdisplay (2)2 is determined by adding delta Vdata (2)2 to Vdisplay (1) 2; … …, Vdispllay (2) N is a display data signal required by the Nth Gray level Gray 0 at the second temperature, and the value of Vdispllay (2) N is determined by adding Δ Vdata (2) N to Vdispllay (1) N.
In step S33, common signals Vcom (t) at different temperatures are determined according to the first common signal Vcom (1) and the common adjustment signals Δ Vcom (t) at different temperatures, and one common signal corresponds to one gray scale. Specifically, the common signal Vcom (t) at a specific temperature is equal to the common adjustment signal Δ Vcom (t) at the temperature plus the first common signal Vcom (1). For example, at a second temperature, the common signal Vcom (2) is equal to the common adjustment signal Δ Vcom (2) at that temperature plus the first common signal Vcom (1); at the third temperature, the common signal Vcom (3) is equal to the common adjustment signal Δ Vcom (3) at the temperature plus the first common signal Vcom (1), … …, as above, to obtain the common signals at the desired respective temperatures.
Then, step S4 is executed to store the display signal sets and the common signal at the plurality of different temperatures.
And storing the common signals and the display data signal groups of the sub-pixels in the display area at different temperatures obtained in the above steps, and burning the common signals and the display data signal groups to a register, so that when the display temperature changes, the common signals and the display data signal groups corresponding to different gray scales at different temperatures can be directly called according to burning information in the register, thereby ensuring that the display response speed is high and the display effect is good.
When the temperature changes, the cathode potential changes are used as an example to illustrate how to obtain the corresponding display data signal groups at different temperatures, and the common signals and the display data signal groups are adjusted simultaneously, so that the data voltage adjustment of the anode can meet the adjustment requirement, and the adjustment can be completed sequentially.
On the basis of the foregoing embodiment, fig. 7 is a schematic flowchart of another control method for a display panel according to an embodiment of the present invention, and compared with the foregoing embodiment, the control method for a display panel shown in fig. 7 describes in detail how to determine the driving current density of sub-pixels in different sub-temperature sensing regions. As shown in fig. 7, step S1 of the method for controlling a display panel according to the embodiment of the present invention more specifically includes:
step S11, determining the gray scale of N sub-pixels;
step S12, determining N drive current densities according to the gray scales of the N sub-pixels; wherein, the i-th sub-pixel has Gray level Gray i, driving current density Jts i, and Jts i-Jtsmax*(i/N-1)GammaWherein i is more than or equal to 0 and less than N-1, and i is an integer JtsmaxFor the maximum driving current density in the N driving current densities, Gamma represents a Gamma value. When the number of gray levels displayed on the display panel is 256, N is equal to 256. For example, the Gray level of the first sub-pixel TS (1) is a first Gray level Gray1, and the driving current density is Jts 1; the Gray scale of the second sub-pixel TS (2) is a second Gray scale Gray2, and the driving current density is Jts 2; … …; the Gray scale of the (N-1) th sub-pixel TS (N-1) is the (N-1) th Gray scale Gray 255, and the driving current density is Jts 255; the nth sub-pixel TSN has a Gray level of zero Gray level Gray 0 and a driving current density of 0. Then, the driving current density corresponding to the (N-1) th Gray level Gray 255 is the maximum driving current density JtsmaxThe ith sub-pixel has a Gray level Gray i as the maximum driving current density JtsmaxMultiplication by (i/N-1)GammaThe smaller the gray scale, the smaller the driving current density, and the driving current density at zero gray scale is zero.
For example, the gray scale and brightness corresponding relationship under a specific Gamma value is: the luminance of Gray 255 is L255, and the luminance Li of Gray i satisfies Li ═ Lmax*(i/N-1)Gamma；LmaxThe brightness of (b) is the maximum brightness, i.e., the highest gray level. Maximum brightness LmaxAnd maximum drive current density JtsmaxThe corresponding relation with the current efficiency CE is: l ismax＝Jtsmax*CE。
Therefore, when the current efficiency CE and the Gamma value are determined correspondingly, the gray scales correspond to the driving current densities one by one, and the N sub-pixels display different gray scales, that is, the driving current densities of the N sub-pixels are different.
Step S13, applying different driving current densities to the N sub-pixels, so that the N sub-pixels display different gray scales.
Furthermore, the driving current density is related to the magnitude of the driving current value and the area of the sub-pixel; the driving current values are the same, the areas of the sub-pixels are different, and the driving current densities are different; the areas of the sub-pixels are the same and the drive current densities are different for different drive current values. The following describes the above two cases as examples.
As a possible implementation, the N sub-pixels are arranged to have different areas, and the N sub-pixels are mainly arranged to have different areas of the anodes of the N sub-pixels, because the cathodes of the N sub-pixels are connected to each other and cannot be distinguished. Applying the same driving current to the N sub-pixels with different areas; determining the driving current density of different sub-pixels according to the gray scale at this time may include:
determining the areas of different sub-pixels according to the gray scale; wherein, the area of the sub-pixel displaying the highest gray scale is set to be the minimum, and the area is Stsmin(ii) a The ith sub-pixel has an ith Gray level Gray i and an area St imin*(N-1/i)GammaI is more than or equal to 0 and less than N-1, and i is an integer. Under a specific Gamma value, when the driving current values are the same, the corresponding relationship between the areas of the sub-areas can be determined according to the relationship between the gray scales of different sub-areas.
For example, the sub-pixel (N-1) displaying the highest gray level 255 is first determined, and its area is the smallest StsminThen the area of other sub-pixel is Sts i to Stsmin*(255/i)GammaFor example, the first subpixel TS1 has an area Sts 1 — Stsmin*(255/1)GammaThen the area of the first subpixel TS1 is the largest; a second subpixel TS2 having an area Sts 2 ═ Stsmin*(255/2)GammaThen the area of the second subpixel TS2 is smaller than the area of the first subpixel TS 1; … …, respectively; the areas of the plurality of sub-pixels are arranged in sequence in this way. For each areaWhen different sub-pixels apply the same driving current, the larger the area of the sub-pixel, the smaller the driving current density of the sub-pixel, and the smaller the gray scale displayed by the sub-pixel.
As a possible implementation, the areas of the N sub-pixels are the same, and the driving currents on any two sub-pixels are different; determining the driving current density of different sub-pixels according to the gray scale at this time may include:
determining the driving current of different sub-pixels according to the gray scale; wherein, the drive current of the sub-pixel displaying the highest gray scale is set to be the maximum, and the drive current is set to be Itsmax(ii) a The i-th sub-pixel has Gray level Gray i, and driving current is Its i, Its i is Itsmax*(i/N-1)GammaI is more than or equal to 0 and less than N-1, and i is an integer. Under a specific Gamma index, when the areas of the sub-pixels are the same, the corresponding relationship between the driving currents of the sub-pixels can be determined according to the relationship between the gray scales of the different sub-pixels.
For example, the sub-pixel (N-1) displaying the highest gray level 255 is first determined to have a maximum driving current of ItsmaxThen the driving current of other sub-pixels is Its i-Itsmax*(i/255)GammaFor example, in the first sub-pixel TS1, the driving current is Its 1 — Itsmax*(1/255)GammaThen the driving current of the first sub-pixel TS1 is minimum; the second sub-pixel TS2 has a driving current Its 2 ═ Itsmax*(2/255)GammaThen the driving current of the second sub-pixel TS2 is smaller than the driving current of the first sub-pixel TS 1; … …; the driving currents of the plurality of sub-pixels are sequentially set to be different. When different driving currents are applied to the sub-pixels having the same area, the larger the driving current is applied to the sub-pixel, the larger the driving current density is, and the larger the gray scale is displayed.
Step S2, step S3, and step S4 are then executed after step S13.
Step S2, under different temperatures, keeping the gray scale of the N sub-pixels unchanged, and acquiring a data signal group of the anode and a common signal of the cathode of the N sub-pixels;
step S3, converting the data signal group into a display signal group; or converting the data signal group and the common signal into a display signal group;
and step S4, storing the display signal group and the common signal under the plurality of different temperatures.
It is to be noted that the foregoing description is only exemplary of the invention and that the principles of the technology may be employed. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in some detail by the above embodiments, the invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the invention, and the scope of the invention is determined by the scope of the appended claims.

Claims (8)

1. The control method of the display panel is characterized in that the display panel comprises a display area and a temperature sensing area;
the temperature sensing area comprises N sub-pixels, and N is equal to the gray scale quantity displayed by the display panel; each sub-pixel comprises an anode and a cathode, and the cathodes of the N sub-pixels are connected with each other;
the control method comprises the following steps:
step S1, setting the N sub-pixels to display different gray scales;
step S2, under different temperatures, keeping the gray scale of the N sub-pixels unchanged, and acquiring a data signal group of the anode and a common signal of the cathode of the N sub-pixels;
step S3, converting the data signal group into a display signal group; or converting the data signal group and the common signal into a display signal group;
and step S4, storing the display signal group and the common signal under the plurality of different temperatures.
2. The control method according to claim 1, characterized in that:
the step S2 includes:
step S21, at a first temperature, acquiring a first data signal group and a common signal, wherein the first data signal group comprises N first data signals, and one first data signal corresponds to one sub-pixel;
step S22, changing the temperature, keeping the gray scale of the N sub-pixels unchanged, keeping the common signal unchanged, and obtaining data adjusting signal groups of the N sub-pixels at different temperatures, wherein each data adjusting signal group comprises N data adjusting signals, and one data adjusting signal corresponds to one sub-pixel;
the step S3 includes:
step S31, determining a first display data signal group at the first temperature according to a display mode and the first display data signal group, where the first display data signal group includes N first display data signals, and one of the first display data signals corresponds to one gray scale;
step S32, determining display data signal groups at different temperatures according to the first display data signal group and the data modulation signal groups at different temperatures, where each display data signal group includes N display data signals, and one display data signal corresponds to one gray scale.
3. The control method according to claim 1, characterized in that:
the step S2 includes:
step S21, acquiring a first data signal group and a first common signal at a first temperature, wherein the first data signal group comprises N first data signals, and one first data signal corresponds to one sub-pixel;
step S22, changing the temperature, keeping the gray scale of the N sub-pixels unchanged, changing the first common signal, and obtaining data adjusting signal groups and common adjusting signals of the N sub-pixels at different temperatures, wherein each data adjusting signal group comprises N data adjusting signals, and one data adjusting signal corresponds to one sub-pixel;
the step S3 includes:
step S31, determining a first display data signal group at the first temperature according to a display mode and the first display data signal group, wherein the first display data signal group includes N first display data signals, and one first display data signal corresponds to one gray scale;
step S32, determining display data signal groups at different temperatures according to the first display data signal group and the data adjusting signal groups at different temperatures, wherein each display data signal group comprises N display data signals, and one display data signal corresponds to one gray scale;
step S33, according to the first common signal and the common adjusting signal under different temperatures, common signals under different temperatures are determined, and one common signal corresponds to one gray scale.
4. The control method according to claim 2 or 3, wherein the display mode includes a monochrome display and a color display;
determining a first set of display data signals for subpixels in the display area at the first temperature based on a display mode and the first set of data signals, comprising:
when the display mode is the monochrome display, the first display data signal group is the same as the first data signal group;
and when the display mode is the color display, performing one-time process operation according to the first data signal group to determine the first display data signal group of the sub-pixel in the display area.
5. The control method according to claim 4, wherein when the display mode is the color display, the first display data signal group of the sub-pixels in the display area includes display data signals of different color sub-pixels.
6. The control method according to claim 1, wherein the step S1 includes:
step S11, determining the gray scale of N sub-pixels;
step S12, determining N drive current densities according to the gray scales of the N sub-pixels; wherein, the i-th sub-pixel has Gray level Gray i, driving current density Jts i, and Jts i-Jtsmax*(i/N-1)GammaWherein i is more than or equal to 0 and less than N-1, and i is an integer JtsmaxIs the maximum drive current density of the N drive current densities;
step S13, applying different driving current densities to the N sub-pixels, so that the N sub-pixels display different gray scales.
7. The control method according to claim 6, wherein the N sub-pixels have areas different from each other, and applying different driving current densities to the N sub-pixels comprises: the driving currents of the N sub-pixels are the same; wherein the content of the first and second substances,
the ith sub-pixel has an ith Gray level Gray i and an area St imin*(N-1/i)GammaI is not less than 0 and less than N-1, and i is an integer, StsminIs the area of the sub-pixel displaying the highest gray scale, and the area of the sub-pixel displaying the highest gray scale is the smallest.
8. The control method according to claim 6, wherein N sub-pixels have the same area, and applying different driving currents to the N sub-pixels comprises: the driving currents of the N sub-pixels are different from each other; wherein the content of the first and second substances,
the i-th sub-pixel has Gray level Gray i, and driving current is Its i, Its i is Itsmax*(i/N-1)GammaI is not less than 0 and less than N-1, and i is an integer ItsmaxThe driving current of the sub-pixel displaying the highest gray scale is the largest.
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CN112700748A (en) * 2020-12-28 2021-04-23 合肥视涯显示科技有限公司 Display panel, control method thereof and display device
CN112735336A (en) * 2020-12-30 2021-04-30 合肥视涯显示科技有限公司 Display panel, control method thereof and display device
CN112863439A (en) * 2021-01-21 2021-05-28 京东方科技集团股份有限公司 Method and device for improving OLED (organic light emitting diode) afterimage, display device and medium

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