CN110111736B - Display device driving method and display device driving system - Google Patents
Display device driving method and display device driving system Download PDFInfo
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- CN110111736B CN110111736B CN201910281149.4A CN201910281149A CN110111736B CN 110111736 B CN110111736 B CN 110111736B CN 201910281149 A CN201910281149 A CN 201910281149A CN 110111736 B CN110111736 B CN 110111736B
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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
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2320/00—Control of display operating conditions
- G09G2320/02—Improving the quality of display appearance
- G09G2320/0233—Improving the luminance or brightness uniformity across the screen
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Abstract
The invention provides a display device driving method and a display device driving system, wherein the display device driving method comprises the steps of determining a first driving voltage of a target pixel according to a picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage; the invention determines the first driving voltage of the target pixel according to the picture to be displayed, and increases the corresponding compensation voltage for the target pixel according to the voltage drop of different pixels corresponding to different degrees, so that the luminance of different pixels is the same when the driving pixels emit light with the same intensity, thereby solving the problem that the luminance of different pixels is different when the driving pixels emit light with the same intensity in the conventional AMOLED display panel.
Description
Technical Field
The present invention relates to the field of display technologies, and in particular, to a display device driving method and a display device driving system.
Background
An existing AMOLED (Active Matrix Organic Light Emitting Diode) display panel is thinner and lighter than a liquid crystal display panel, and has a wide application, but in a pixel circuit of the AMOLED display panel, since a power line and a circuit connection line have a certain resistance, current is lost when passing through the power line and the circuit connection line, a difference in transmission line length between pixels at different positions and a driving chip (Data-IC) is large, and different pixels correspond to different voltage drops.
When the existing display panel drives the pixels to display, a corresponding driving voltage is provided according to the light emitting intensity required by the pixels, for example, when the pixels reach the same light intensity, the driving chip provides the same driving voltage (Vdata) for all the pixels; however, different pixels correspond to different voltage drops, which causes different actual voltages reaching different pixels when the driving chip provides the same driving voltage (Vdata), thereby causing different luminance of different pixels; this problem is exacerbated especially as the size of the panel increases.
Therefore, the conventional AMOLED display panel has a technical problem that the luminance of different pixels is different when the pixels are driven to emit light with the same intensity, and needs to be improved.
Disclosure of Invention
The invention provides a display device driving method and a display device driving system, which are used for solving the technical problem that the luminance of different pixels is different when the driving pixels emit light with the same intensity in the conventional AMOLED display panel.
In order to solve the above problems, the technical scheme provided by the invention is as follows:
the present invention provides a display device driving method, including:
determining a first driving voltage of a target pixel according to a picture to be displayed;
acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel;
determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage;
driving the target pixel using the second driving voltage.
In the display device driving method provided by the present invention, the display device driving method further includes:
compensating a driving transistor of a first pixel, the first pixel including at least one pixel in the display panel;
controlling a driving transistor of the first pixel to work in a linear region;
controlling a power supply voltage of the display panel to increase from a first voltage value;
monitoring brightness change of the display panel;
when the brightness of the display panel reaches a preset value, acquiring the working voltage of the light emitting diode of the first pixel and a second voltage value of the power supply voltage;
acquiring the average working voltage of pixels in the display panel according to the working voltage of the first pixel;
obtaining a compensation voltage corresponding to the first pixel according to the working voltage of the first pixel, the average working voltage and the second voltage value;
and determining the compensation voltage of the target pixel according to the compensation voltage of the first pixel.
In the driving method of a display device provided by the present invention, the step of controlling the driving transistor of the first pixel to operate in a linear region includes: and controlling the gate voltage of the driving transistor of the first pixel so that the driving transistor of the first pixel works in a linear region.
In the driving method of the display device provided by the invention, the driving chip is used for outputting the driving voltage within a preset range.
In the driving method of a display device according to the present invention, the step of compensating the driving transistor of the first pixel includes:
sensing and compensating for a threshold voltage of a drive transistor of the first pixel;
the mobility of the drive transistor of the first pixel is sensed and compensated.
In the driving method of a display device according to the present invention, the step of monitoring a luminance change of the display panel includes: and sensing the brightness of the display panel through a brightness measuring device so as to monitor the brightness change of the display panel.
In the driving method of a display device according to the present invention, the step of obtaining the operating voltage of the light emitting diode of the first pixel includes:
sensing a voltage of a light emitting diode of the first pixel through a sensing circuit connected with the light emitting diode;
and taking the voltage when the brightness of the display panel reaches a preset value as the working voltage.
In the driving method of a display device according to the present invention, the determining the compensation voltage of the target pixel according to the compensation voltage of the first pixel further includes: a compensation voltage is provided to the pixels in the first region.
In the driving method of a display device according to the present invention, the determining the compensation voltage of the target pixel according to the compensation voltage of the first pixel further includes: the compensation voltage is supplied to the pixels in all the regions.
Meanwhile, the present invention also provides a display device driving system, including:
a display panel;
the driving chip is used for receiving a picture to be displayed and determining a first driving voltage of a target pixel according to the picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage.
The invention has the beneficial effects that:
the invention provides a display device driving method and a display device driving system, wherein the display device driving method comprises the steps of determining a first driving voltage of a target pixel according to a picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage; the invention determines the first driving voltage of the target pixel according to the picture to be displayed, and increases the corresponding compensation voltage for the target pixel according to the voltage drop of different pixels corresponding to different degrees, so that the luminance of different pixels is the same when the driving pixels emit light with the same intensity, thereby solving the problem that the luminance of different pixels is different when the driving pixels emit light with the same intensity in the conventional AMOLED display panel.
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 flowchart of a driving method of a display device according to an embodiment of the invention;
FIG. 2 is a schematic diagram of a driving system of a display device according to an embodiment of the present invention;
FIG. 3 is a diagram of a pixel driving circuit according to an embodiment of the present invention;
fig. 4 is a schematic diagram illustrating compensation of a threshold voltage of a driving transistor in a pixel driving circuit according to an embodiment of the invention.
Detailed Description
While the embodiments and/or examples of the present invention will be described in detail and fully with reference to the specific embodiments thereof, it should be understood that the embodiments and/or examples described below are only a part of the embodiments and/or examples of the present invention and are not intended to limit the scope of the invention. All other embodiments and/or examples, which can be obtained by a person skilled in the art without making any inventive step, based on the embodiments and/or examples of the present invention, belong to the scope of protection of the present invention.
Directional terms used in the present invention, such as [ upper ], [ lower ], [ left ], [ right ], [ front ], [ rear ], [ inner ], [ outer ], [ side ], are only referring to the directions of the attached drawings. Accordingly, the directional terminology is used for the purpose of describing and understanding the invention and is in no way limiting. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature.
The AMOLED display panel is used for solving the technical problem that different pixels have different luminance when the driving pixels emit light with the same intensity in the conventional AMOLED display panel.
In the embodiment of the present invention, the voltage drop, i.e. the transmission line between the power line, different pixels and the driving chip in the pixel circuit has resistance, so that there is a corresponding voltage loss, i.e. IR, at different positions in the pixel circuit.
In an embodiment, as shown in fig. 1, a driving method of a display device according to an embodiment of the present invention includes:
s1, determining a first driving voltage of the target pixel according to the picture to be displayed;
s2, obtaining a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel;
s3, determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage;
and S4, driving the target pixel by using the second driving voltage.
The present embodiment provides a display device driving method, including: determining a first driving voltage of a target pixel according to a picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage; the invention determines the first driving voltage of the target pixel according to the picture to be displayed, and increases the corresponding compensation voltage for the target pixel according to the voltage drop of different degrees of different pixels, so that the luminance of different pixels is the same when the driving pixel emits light with the system intensity, thereby solving the problem that the luminance of different pixels is different when the driving pixel emits light with the same intensity in the conventional AMOLED display panel.
In one embodiment, the display device driving method further includes:
compensating a driving transistor of a first pixel, the first pixel including at least one pixel in the display panel;
controlling a driving transistor of the first pixel to work in a linear region;
controlling a power supply voltage of the display panel to increase from a first voltage value;
monitoring brightness change of the display panel;
when the brightness of the display panel reaches a preset value, acquiring the working voltage of the light emitting diode of the first pixel and a second voltage value of the power supply voltage;
acquiring the average working voltage of pixels in the display panel according to the working voltage of the first pixel;
obtaining a compensation voltage corresponding to the first pixel according to the working voltage of the first pixel, the average working voltage and the second voltage value;
and determining the compensation voltage of the target pixel according to the compensation voltage of the first pixel.
In one embodiment, as shown in fig. 2, a display device driving system according to an embodiment of the present invention includes:
a display panel 41 for displaying a screen;
the driving chip 42 is configured to receive a picture to be displayed, and determine a first driving voltage of a target pixel according to the picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage.
The embodiment of the invention provides a display device driving system, wherein a driving chip in the display device driving system determines a first driving voltage of a target pixel according to a picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage; the invention determines the first driving voltage of the target pixel according to the picture to be displayed, and increases the corresponding compensation voltage for the target pixel according to the voltage drop of different degrees of different pixels, so that the luminance of different pixels is the same when the driving pixel emits light with the system intensity, thereby solving the problem that the luminance of different pixels is different when the driving pixel emits light with the same intensity in the conventional AMOLED display panel.
In one embodiment, as shown in fig. 2, the display device driving system further includes a sensing measurement device 43, a brightness measurement device 44, and a voltage calculation device 45, the sensing measurement device 43 measures the display panel and transmits the measurement result to the driving chip, the brightness measurement device 44 measures the brightness of the display panel and transmits the measurement result to the driving chip, and the voltage calculation device 45 calculates a compensation voltage of the display panel and transmits the calculation result to the driving chip.
In one embodiment, the sensing and measuring device 43 is used for triggering the driving chip to compensate the driving transistor of the first pixel, the first pixel comprises at least one pixel in the display panel, and is used for triggering the driving chip to control the driving transistor of the first pixel to work in a linear region, and is used for triggering the driving chip to control the power supply voltage of the display panel to increase from a first voltage value.
In one embodiment, the brightness measuring device 44 is used for monitoring the brightness change of the display panel; and when the brightness of the display panel reaches a preset value, triggering the driving chip to acquire the working voltage of the light emitting diode of the first pixel and a second voltage value of the power voltage.
In an embodiment, the voltage calculating device 45 is configured to obtain an average working voltage of pixels in the display panel according to the working voltage of the first pixel, and obtain a compensation voltage corresponding to the first pixel according to the working voltage of the first pixel, the average working voltage, and the second voltage value; and determining the compensation voltage of the target pixel according to the compensation voltage of the first pixel.
In one embodiment, as shown in fig. 3, a pixel driving circuit provided in an embodiment of the present invention includes: a Data signal line (Data)11, a Scan signal line (Scan)12, a sensing signal line (sequence) 13, a power voltage terminal 14, a sensing voltage terminal 15, a reference voltage terminal 16, a digital/analog converter terminal 17, wherein the Data signal line 11 is used for outputting a Data signal, a storage capacitor 25 is used for storing a driving voltage (Data voltage Vdata) output by the Data signal line 11, the storage capacitor 25 is used for outputting the driving voltage (Vdata) to a gate of a driving transistor 22, a light emitting diode 24 is used for emitting light according to a current output by the driving transistor 22, the Scan signal line 12 is used for controlling the switching of a switching transistor 21, the sensing signal line 13 is used for controlling the switching of a sensing transistor 23, the power voltage terminal 14 is used for outputting a voltage, the sensing voltage terminal 15 is used for outputting a sensing voltage (Vsen), the reference voltage terminal 16 is used for outputting a reference voltage (Vref) when a first switch (Spre)27 is turned on, the digital/analog converter terminal 17 is used for converting a digital signal and an analog signal when the second switch (Sam)28 is opened.
In an embodiment, for the threshold voltage of the driving transistor changing to affect the light emitting brightness of the display panel, the embodiment of the invention compensates the threshold voltage of the driving transistor, as shown in fig. 4, the embodiment of the invention provides a schematic diagram of compensating the threshold voltage of the driving transistor of the pixel circuit, where (1) in fig. 4 is a timing diagram of the pixel circuit, (2) in fig. 4 is a threshold voltage variation curve of the driving transistor corresponding to the timing diagram, a curve a is a threshold voltage variation curve of the driving transistor when the threshold voltage is a positive value, and a curve b is a threshold voltage variation curve of the driving transistor when the threshold voltage is a negative value.
In this embodiment, the threshold voltage of the driving transistor is compensated, wherein Vdata-sen is the driving voltage, in the first stage 1, the Scan signal line (Scan) controls the switching transistor to be turned on, the first switch (Spre) is turned on, the reference voltage terminal outputs the reference voltage (Vref), in the second stage 2, the sensing signal line (Sense) controls the sensing transistor to be turned on, the sensing voltage terminal outputs the compensation voltage to compensate the threshold voltage of the driving transistor, so that the current output by the driving transistor approaches the normal light emitting current of the light emitting diode, so that the light emitting diode normally emits light, in the third stage 3, the second switch (Sam) is turned on, and the compensation voltage signal is written into the digital/analog converter.
In an embodiment, aiming at the problem that the mobility of the driving transistor changes so as to affect the light emitting brightness of the display panel, the embodiment of the invention compensates the mobility of the driving transistor, and compensates the mobility of the driving transistor by controlling the induction voltage and the data voltage, so that the mobility of the driving transistor meets the requirement, and the display panel can normally emit light.
In one embodiment, the step of controlling the driving transistor of the first pixel to operate in a linear region comprises: the gate voltage of the driving transistor of the first pixel is controlled to operate the driving transistor of the first pixel in a linear region, for example, the gate voltage of the driving transistor is controlled to be any one of 12V to 15V.
In one embodiment, the first voltage value is 0, or the pixel is driven to emit light, and the power voltage when any brightness of the pixel is taken is the first voltage.
In one embodiment, the luminance measuring apparatus is a CA310 luminance measuring device, and the operating voltage of the light emitting diode of the first pixel and the second voltage value of the power supply voltage are obtained when the luminance of the display panel is monitored to reach a preset value by controlling the driving transistor to operate in a linear region and then increasing the power supply voltage from a first voltage value, wherein the preset value of the luminance of the display panel can be a moment when the display panel is turned on or a certain value of the luminance of the display panel.
In one embodiment, the voltage of the light emitting diode of the first pixel is sensed by a sensing circuit connected to the light emitting diode; and taking the voltage when the brightness of the display panel reaches a preset value as the working voltage of the light emitting diode of the first pixel.
In one embodiment, the determined compensation voltage is transmitted to the data signal line to enable the data signal line to output the second driving voltage, so that the target pixel emits light normally or the compensation voltage is directly transmitted to the anode of the light emitting diode to enable the light emitting diode to emit light normally.
In an embodiment, for a larger voltage drop in the middle area of the display panel, the embodiment of the invention takes the middle area of the display panel as the first area, and provides the compensation voltage for the pixels in the first area, or provides the compensation voltage for the pixels in all the areas, so that the luminance of different pixels is the same when the display panel drives the pixels to emit light with the same intensity.
In one embodiment, the display device driving system further includes a data table for obtaining the compensation voltage of the target pixel by looking up the table.
In one application scenario, the threshold voltage and mobility of the driving transistor are compensated, then the gate voltage of the driving transistor is controlled to 12V, the power supply voltage is increased from 0, the luminance of the display panel is measured by using a luminance measuring device, the power supply voltage value at the moment when the display panel is turned on is recorded and recorded as VDD', the anode voltage of the light emitting diode of each target pixel at the moment is recorded as Vpixel, the average value of the anode voltages of the light emitting diodes of the target pixels of the display panel is calculated by a voltage calculating device and recorded as Vavg, and then the voltage difference between the pixels, namely the required compensation voltage, is recorded as:
v complement | Vpixel-Vavg-VDD' |.
When the driving display panel works, firstly, Vdata required by a target pixel is determined, a V complement corresponding to the pixel is found, and then the driving voltage V 'data' actually output by the data signal line is determined to be Vdata + V complement, so that the voltage drop of the pixel is correspondingly compensated, and the light-emitting brightness of different pixels is the same when the driving pixel emits light with the same intensity.
According to the above embodiment: the embodiment of the invention provides a display device driving method and a display device driving system, wherein the display device driving method comprises the steps of determining a first driving voltage of a target pixel according to a picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage; the invention determines the first driving voltage of the target pixel according to the picture to be displayed, and increases the corresponding compensation voltage for the target pixel according to the voltage drop of different pixels corresponding to different degrees, so that the luminance of different pixels is the same when the driving pixels emit light with the same intensity, thereby solving the problem that the luminance of different pixels is different when the driving pixels emit light with the same intensity in the conventional AMOLED display panel.
In summary, although the present invention has been described with reference to the preferred embodiments, the above-described preferred embodiments are not intended to limit the present invention, and those skilled in the art can make various changes and modifications without departing from the spirit and scope of the present invention, therefore, the scope of the present invention shall be determined by the appended claims.
Claims (9)
1. A display device driving method, comprising:
compensating a driving transistor of a first pixel, the first pixel including at least one pixel in a display panel;
controlling a driving transistor of the first pixel to work in a linear region;
controlling a power supply voltage of the display panel to increase from a first voltage value;
monitoring brightness change of the display panel;
when the brightness of the display panel reaches a preset value, acquiring the working voltage of the light emitting diode of the first pixel and a second voltage value of the power supply voltage;
acquiring the average working voltage of pixels in the display panel according to the working voltage of the first pixel;
obtaining a compensation voltage corresponding to the first pixel according to the working voltage of the first pixel, the average working voltage and the second voltage value;
determining the compensation voltage of a target pixel according to the compensation voltage of the first pixel;
determining a first driving voltage of the target pixel according to a picture to be displayed;
acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel;
determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage;
driving the target pixel using the second driving voltage.
2. The display device driving method according to claim 1, wherein the step of controlling the driving transistor of the first pixel to operate in a linear region comprises: and controlling the gate voltage of the driving transistor of the first pixel so that the driving transistor of the first pixel works in a linear region.
3. The display device driving method according to claim 2, wherein the driving chip is used to output the driving voltage within a preset range.
4. The display device driving method according to claim 1, wherein the step of compensating the driving transistor of the first pixel comprises:
sensing and compensating for a threshold voltage of a drive transistor of the first pixel;
the mobility of the drive transistor of the first pixel is sensed and compensated.
5. The display device driving method according to claim 1, wherein the step of monitoring the luminance change of the display panel comprises: and sensing the brightness of the display panel through a brightness measuring device so as to monitor the brightness change of the display panel.
6. The display device driving method according to claim 1, wherein the step of obtaining the operating voltage of the light emitting diode of the first pixel comprises:
sensing a voltage of a light emitting diode of the first pixel through a sensing circuit connected with the light emitting diode;
and taking the voltage when the brightness of the display panel reaches a preset value as the working voltage.
7. The display device driving method according to claim 1, wherein the step of determining the compensation voltage of the target pixel based on the compensation voltage of the first pixel further comprises: a compensation voltage is provided to the pixels in the first region.
8. The display device driving method according to claim 1, wherein the step of determining the compensation voltage of the target pixel based on the compensation voltage of the first pixel further comprises: the compensation voltage is supplied to the pixels in all the regions.
9. A display device driving system, comprising:
a display panel;
the driving chip is used for receiving a picture to be displayed and determining a first driving voltage of a target pixel according to the picture to be displayed; acquiring a compensation voltage of the target pixel, wherein the compensation voltage corresponds to the voltage drop of the target pixel; determining a second driving voltage of the target pixel according to the first driving voltage and the compensation voltage; driving the target pixel using the second driving voltage;
the sensing and measuring device is used for triggering a driving chip to compensate a driving transistor of a first pixel, wherein the first pixel comprises at least one pixel in the display panel, and is used for triggering the driving chip to control the driving transistor of the first pixel to work in a linear region and controlling a power supply voltage of the display panel to increase from a first voltage value;
the brightness measuring device is used for monitoring the brightness change of the display panel; when the brightness of the display panel reaches a preset value, triggering the driving chip to acquire the working voltage of the light emitting diode of the first pixel and a second voltage value of the power voltage;
the voltage calculation device is used for acquiring the average working voltage of the pixels in the display panel according to the working voltage of the first pixel and acquiring the compensation voltage corresponding to the first pixel according to the working voltage of the first pixel, the average working voltage and the second voltage value; and determining the compensation voltage of the target pixel according to the compensation voltage of the first pixel.
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| CN111048040B (en) * | 2020-01-02 | 2021-08-03 | 深圳市华星光电半导体显示技术有限公司 | Pixel driving circuit voltage compensation method, voltage compensation circuit and display panel |
| CN112201190B (en) * | 2020-10-09 | 2023-04-21 | Oppo（重庆）智能科技有限公司 | Control method, processor, direct-current voltage element, display screen and electronic equipment |
| CN114141192A (en) * | 2021-12-03 | 2022-03-04 | Tcl华星光电技术有限公司 | Driving circuit, driving method and device thereof, array substrate and display device |
| CN116631340A (en) * | 2022-02-10 | 2023-08-22 | 北京小米移动软件有限公司 | Pixel unit, display panel, pixel unit compensation method and device |
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