CN111128075A - Driving method and driving device of OLED display panel and display device - Google Patents

Driving method and driving device of OLED display panel and display device Download PDF

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CN111128075A
CN111128075A CN202010001928.7A CN202010001928A CN111128075A CN 111128075 A CN111128075 A CN 111128075A CN 202010001928 A CN202010001928 A CN 202010001928A CN 111128075 A CN111128075 A CN 111128075A
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voltage
display panel
oled display
cathode
driving
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CN111128075B (en
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王文博
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BOE Technology Group 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]

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  • General Physics & Mathematics (AREA)
  • Theoretical Computer Science (AREA)
  • Control Of El Displays (AREA)
  • Electroluminescent Light Sources (AREA)
  • Control Of Indicators Other Than Cathode Ray Tubes (AREA)

Abstract

The utility model discloses a driving method and a driving device of an OLED display panel and a display device, which relate to the field of display and are used for solving the problem of screen flicker of the OLED display panel in the process of adjusting the cathode voltage to reduce the power consumption. The driving method of the OLED display panel comprises the following steps: acquiring reference voltage of a corresponding cathode in an OLED display panel; receiving a display brightness instruction, and determining a target voltage of the cathode according to the display brightness instruction; determining a plurality of regulating voltages in a step distribution according to the reference voltage and the target voltage; and gradually adjusting the reference voltage to the target voltage according to the plurality of adjustment voltages. The driving method of the OLED display panel is used for reducing the display power consumption of the OLED display panel.

Description

Driving method and driving device of OLED display panel and display device
Technical Field
The disclosure relates to the field of display, and in particular to a driving method and a driving device for an OLED display panel, and a display device.
Background
An OLED (Organic Light Emitting Diode) display device has a series of advantages of self-luminescence, fast response speed, high brightness, full viewing angle, flexible display, and the like, and thus becomes one of the display devices with great competitiveness and development prospect.
However, the OLED display device has high power consumption and is easily aged. The current common way to reduce the power consumption of OLED display devices is: dynamically adjusting cathode voltage (ELVSS) in the OLED display device to make current I flowing through corresponding OLEDdAnd becomes smaller. However, another problem is encountered in that adjusting ELVSS to a certain value causes the driving transistor (DTFT) of the corresponding OLED to enter the linear region of its current-voltage characteristic curve, thereby causing the current I of the OLED to flowdThe brightness of the OLED is suddenly changed due to excessive change, and screen flickering occurs.
Disclosure of Invention
The disclosure aims to provide a driving method and a driving device of an OLED display panel and a display device, which are used for solving the problem of screen flicker of the OLED display panel in the process of adjusting cathode voltage to reduce power consumption.
In order to achieve the above purpose, some embodiments of the present disclosure provide the following technical solutions:
in one aspect, a driving method of an OLED display panel is provided. The driving method of the OLED display panel comprises the following steps: acquiring reference voltage of a corresponding cathode in an OLED display panel; receiving a display brightness instruction, and determining the target voltage of the cathode according to the display brightness instruction; determining a plurality of regulating voltages in step distribution according to the reference voltage and the target voltage; the reference voltage is gradually adjusted to a target voltage in accordance with the plurality of adjustment voltages.
In some embodiments of the present disclosure, the voltage values of the plurality of regulated voltages are an arithmetic progression; or, the voltage values of the plurality of regulating voltages are segmented into at least two equal difference series with different difference values.
In some embodiments of the present disclosure, the driving method of the OLED display panel further includes: prestoring gamma parameters corresponding to a plurality of regulating voltages one by one; and under the condition that the voltage of the cathode is a certain regulating voltage, driving the OLED display panel to display according to the corresponding gamma parameter.
In some embodiments of the present disclosure, an adjustment duration for gradually adjusting the reference voltage to the target voltage is less than a display duration of one frame of the display screen; or, the adjusting time length for gradually adjusting the reference voltage to the target voltage is less than or equal to the frame blanking time length of one frame of the display picture.
In the embodiment of the disclosure, after the reference voltage and the target voltage of the corresponding cathode in the OLED display panel are obtained in advance according to the display brightness instruction, a plurality of adjustment voltages in step distribution can be reasonably determined to realize accurate adjustment of the cathode voltage, so that the driving transistor connected to the corresponding OLED is prevented from suddenly changing from the saturation region to the linear region. After the reference voltage corresponding to the cathode is gradually adjusted to the target voltage according to the plurality of adjusting voltages, the slow transition of the cathode voltage can be effectively realized, so that the driving current corresponding to the OLED can be slowly changed, the smooth transition of the display brightness of the OLED display panel is also realized, and the phenomenon of screen flashing can be effectively avoided. That is, the driving method of the OLED display panel in the embodiments of the present disclosure can solve the problem of screen flicker while reducing power consumption of the OLED display panel.
In another aspect, a driving apparatus of an OLED display panel is provided. The driving device of the OLED display panel comprises a display driving integrated circuit and a power management integrated circuit. The display driving integrated circuit is electrically connected with the cathode in the OLED display panel and is configured to acquire a reference voltage and a target voltage of the cathode according to the display brightness value instruction and determine a plurality of adjusting voltages distributed in a step mode according to the reference voltage and the target voltage so as to provide a corresponding voltage adjusting instruction. The power management integrated circuit is electrically connected with the display driving integrated circuit and the cathode, and is configured to receive a voltage regulation instruction and gradually regulate the reference voltage of the cathode to a target voltage according to the voltage regulation instruction.
In some embodiments of the present disclosure, the display driving integrated circuit is further configured to pre-store gamma parameters corresponding to a plurality of adjustment voltages one to one, and drive the OLED display panel to display according to the corresponding gamma parameters when the voltage of the cathode is a certain adjustment voltage.
The driving device of the OLED display panel provided in some embodiments of the present disclosure is used to implement the driving method of the OLED display panel in the above embodiments, and the beneficial effects that can be achieved by the driving device are the same as those achieved by the driving method of the OLED display panel provided in some embodiments, and are not described herein again.
In still another aspect, an OLED display device is provided. The OLED display device includes an OLED display panel and a driving device electrically connected thereto as described in the above embodiments.
The beneficial effects that can be achieved by the OLED display device provided in some embodiments of the present disclosure are the same as those that can be achieved by the driving device of the OLED display panel provided in some embodiments, and are not described herein again.
In yet another aspect, a computer-readable storage medium is provided. The computer readable storage medium stores computer program instructions. The computer program instructions, when executed on a processor, cause the processor to perform one or more steps of the method of driving an OLED display panel as described in the above embodiments.
The beneficial effects that can be achieved by the computer-readable storage medium provided by some embodiments of the present disclosure are the same as those that can be achieved by the driving method of the OLED display panel provided by some embodiments, and are not described herein again.
Drawings
The accompanying drawings, which are included to provide a further understanding of some embodiments of the disclosure and are incorporated in and constitute a part of this disclosure, illustrate embodiments of the disclosure and together with the description serve to explain the disclosure and not to limit the disclosure. In the drawings:
FIG. 1 is a flow chart of a driving method of an OLED display panel in some embodiments;
fig. 2 is a schematic diagram of a driving apparatus of an OLED display panel according to some embodiments;
FIG. 3 is a graph of electrical characteristics of an OLED cathode voltage adjusted according to a DBV command in some embodiments;
FIG. 4 shows the OLED cathode voltage and OLED current I in some embodimentsdElectrical property map of;
FIG. 5 shows an OLED cathode voltage and OLED current I in some embodimentsdElectrical property map of;
FIG. 6 shows another OLED cathode voltage and OLED current I in some embodimentsdElectrical property map of;
FIG. 7 is a graph of electrical characteristics of OLED cathode voltage versus DBV commands in some embodiments;
fig. 8 is a timing diagram of a driving method of an OLED display panel according to some embodiments.
Detailed Description
For the convenience of understanding, the technical solutions provided by some embodiments of the present disclosure are described in detail below with reference to the accompanying drawings. It is to be understood that the described embodiments are merely a subset of the disclosed embodiments and not all embodiments. All other embodiments that can be derived by one skilled in the art from some of the embodiments of the disclosure are intended to be within the scope of the disclosure.
In order to provide a good visual experience for a user, a Display Brightness Value (DBV) that can be used to adjust the OLED Display panel is usually preset in the OLED Display device. For example, the value range of the display brightness value may be set to [0,100], so that the user may adjust the display brightness by changing the display brightness value of the OLED display panel.
For example, when the ambient light is strong, the user may increase the display brightness value of the OLED display panel, so that the user can clearly see the content displayed on the OLED display panel. When the ambient light is weak, the display brightness value of the OLED display panel can be reduced by the user, so that the problem that the eyes of the user are pricked due to the overlarge brightness difference between the ambient light and the OLED display panel is avoided.
Since the display brightness of the OLED display panel is determined by the voltage difference between the two ends of each OLED in the OLED display panel, adjusting the display brightness value of the OLED display panel actually adjusts the voltage difference between the two ends of each OLED in the OLED display panel. And, the Voltage difference between the two ends of the OLED is related to the difference between the gray scale Voltage (Vdata) and the cathode Voltage (ELVSS). Therefore, in the related art, adjusting the display brightness value of the OLED display panel can be achieved by adjusting the gray scale voltage Vdata and the cathode voltage ELVSS of the OLED.
In order to save power consumption, in some embodiments, the display brightness value of the OLED display panel is adjusted by adjusting the cathode voltage ELVSS of the OLED. However, due to the hardware limitation of the current OLED display device, it is difficult to satisfy the use requirement with the minimum adjustment amount of the cathode voltage ELVSS of the OLED. I.e. in regulating the cathode voltage ELVSS of the OLED to a certain valueOne value, it is easy to make the driving transistor DTFT corresponding to the OLED suddenly go from the saturation region of its current-voltage characteristic to the linear region, thereby causing the driving current I of the driving transistor DTFTdAnd (4) sudden change occurs, namely, the display brightness of the OLED display panel suddenly changes, and screen flashing occurs.
Accordingly, referring to fig. 1, 5, 6, 7 and 8, an embodiment of the disclosure provides a driving method of an OLED display panel. The driving method of the OLED display panel comprises S100-S400.
And S100, acquiring the reference voltage of the corresponding cathode in the OLED display panel.
Here, the reference voltage of the cathode refers to a voltage of the cathode in a current display state, that is, a voltage thereof before voltage adjustment is not performed.
S200, receiving a display brightness instruction, and determining a target voltage of the cathode according to the display brightness instruction.
Here, the display brightness command is a command capable of representing a display brightness value DBV of a corresponding OLED in the OLED display panel. Optionally, the display brightness instruction is a display brightness value DBV.
A Display Driver Integrated Circuit (DDIC) in a Display device in which the OLED Display panel is located can determine a target voltage corresponding to a cathode according to a Display brightness instruction, that is, a voltage that the cathode should reach after voltage adjustment is completed on the cathode.
And S300, determining a plurality of regulating voltages in step distribution according to the reference voltage and the target voltage.
After the reference voltage and the target voltage are obtained, the DDIC can reasonably determine a plurality of regulating voltages according to the difference between the reference voltage and the target voltage, and the regulating voltages are distributed in a step mode. That is, the plurality of adjustment voltages are gradually increased or gradually decreased.
And S400, gradually adjusting the reference voltage to the target voltage according to the plurality of adjusting voltages.
The DDIC, after determining the plurality of regulated voltages, is capable of providing corresponding voltage regulation commands to a Power Management Integrated Circuit (PMIC). Thus, the PMIC can gradually adjust the reference voltage of the corresponding cathode to the target voltage according to the voltage adjusting instruction, and therefore smooth transition of the display brightness of the OLED display panel is completed.
It should be noted that, the values of the reference voltage and the target voltage of the cathode are within a certain allowable range, and the setting may be specifically selected according to actual requirements, for example, it can be ensured that the driving transistor DTFT of the corresponding OLED operates in a saturation region of its current-voltage characteristic. That is, the absolute value of the minimum values of the reference voltage and the target voltage of the cathode should be greater than the absolute value of the threshold voltage that the cathode has when its corresponding driving transistor DTFT is located at the boundary of its saturation region and linear region.
Therefore, in the embodiment of the disclosure, after the reference voltage and the target voltage of the corresponding cathode in the OLED display panel are obtained in advance according to the display brightness instruction, a plurality of adjustment voltages in a step distribution can be reasonably determined to realize accurate adjustment of the cathode voltage ELVSS, so that sudden change from a saturation region to a linear region of the driving transistor DTFT connected to the corresponding OLED is avoided.
After the reference voltage corresponding to the cathode is gradually adjusted to the target voltage according to the plurality of adjusting voltages, the slow transition of the cathode voltage ELVSS can be effectively realized, so that the driving current I corresponding to the OLED can be enableddThe display brightness of the OLED display panel is changed slowly, so that the display brightness of the OLED display panel is smoothly transited, and the phenomenon of screen flashing can be effectively avoided.
In some embodiments, the voltage values of the plurality of adjustment voltages are an arithmetic progression. Of course, in other embodiments, it is permissible for the voltage values of the plurality of voltage regulation voltages to be segmented into an arithmetic progression of at least two different difference values. The value of each adjustment voltage and the value of the difference between adjacent adjustment voltages should be favorable for the slow transition of the cathode voltage ELVSS, and the setting is specifically selected according to actual requirements, which is not limited in the embodiments of the present disclosure.
It should be added that, in some embodiments of the present disclosure, the method for driving the OLED display panel further includes: and pre-storing gamma parameters corresponding to the regulating voltages one by one, and driving the OLED display panel to display according to the corresponding gamma parameters under the condition that the voltage of the cathode is a certain regulating voltage.
Here, the gamma parameters are typically pre-stored in the DDIC. According to the gamma parameter corresponding to each adjusting voltage, the brightness change of the OLED display panel can be further smoothed in the process of adjusting the cathode voltage ELVSS, so that the OLED display panel can obtain a better display effect.
It should be noted that, in some embodiments, the adjustment duration for gradually adjusting the reference voltage of the corresponding cathode to the target voltage is less than the display duration of one frame of the display screen. Therefore, the adjustment process of the cathode voltage ELVSS in the OLED display panel can be ensured not to be perceived by human eyes, and the visual experience of the OLED display panel can be improved.
In other embodiments, the adjustment duration of gradually adjusting the reference voltage of the cathode to the target voltage is less than or equal to the frame blanking duration of one frame of the display image, so that the visual experience of the OLED display panel can be further improved.
Here, the display duration of a frame display frame and the corresponding frame blanking duration may refer to related descriptions in the related art, which is not limited in the embodiments of the present disclosure.
In order to more clearly illustrate the driving method of the OLED display panel provided in some of the above embodiments, the following embodiments will be described in conjunction with the problem of the flicker occurring in the OLED display panel.
Referring to fig. 3 and 4, in the related art, it is assumed that a reference voltage of a corresponding cathode in the OLED display panel is-3.5V. As shown in FIG. 3 (a), after receiving the display brightness command (DBV is 400h), the cathode voltage ELVSS can only jump from the reference voltage-3.5V to the target voltage-3.0V directly, which will make the driving transistor DTFT connected to the corresponding OLED enter the linear region from the saturation region thereof, and make the driving current I of the corresponding OLED enter the linear regiondAbrupt changes occur, such as shown in region I, resulting in a flashing of the OLED display panel.
Here, it is understood that, as shown in (b) of fig. 3, each display Brightness command (DBV) corresponds to a gamma parameter including a Brightness value Brightness. As shown in fig. 3 (c), each display luminance command (DBV) corresponds to a different emission control signal duty ratio (EM duty). After receiving the display brightness command (DBV), the OLED display panel may be driven to display according to the corresponding gamma parameter and the corresponding duty ratio of the light emission control signal, and the display brightness change of the OLED display panel may be smoothed to some extent.
Based on this, it is assumed that the threshold voltage corresponding to the cathode is-3.0V according to the boundary point of the saturation region and the linear region corresponding to the driving transistor DTFT. Thus, after receiving the same display brightness command (DBV), the absolute value of the target voltage for the cathode should be greater than the threshold voltage, e.g., -3.1V.
In the above case, the drive current I due to the OLEDdRelated to the gray-scale voltage Vdata and the cathode voltage ELVSS, i.e., IdF (Vdata, ELVSS); the gray scale voltage Vdata is related to the display brightness command DBV. Therefore, the display brightness of the OLED display panel can be correspondingly adjusted by adjusting the gray scale voltage Vdata and the cathode voltage ELVSS of the OLED.
Referring to FIG. 4, for example, when the display brightness command DBV is 400h, the cathode voltage ELVSS is kept unchanged, and the gray-scale voltage Vdata is adjusted from Vdata1 to Vdata2 (corresponding to DBV400h), so as to correspond to the driving current I of the OLEDdFrom Id1Is changed into Id2. At this stage, the drive current I of the OLEDdThe change is small, the change of the display brightness of the corresponding OLED is also small, and the adjustment can be carried out by utilizing the corresponding gamma parameter and EM duty so as to realize the smooth transition of the display brightness. The OLED display panel does not flicker at this stage.
With continued reference to FIG. 4, when the display brightness command DBV is 400h, the gray-scale voltage Vdata is changed from Vdata1 to Vdata2 (corresponding to DBV400h), and the cathode voltage ELVSS is adjusted from-3.5V to-3.1V, which corresponds to the driving current I of the OLEDdFrom Id1Is changed into Id3. At this stage, the drive current I of the OLEDdThe variation is large, the variation of the display brightness of the corresponding OLED is also large, and only the corresponding gamma parameter and EM du are utilizedIt is difficult to achieve a smooth transition when ty is adjusted. The OLED display panel may flicker at this stage.
In some embodiments, the driving method of the OLED display panel provided by the embodiments of the present disclosure is used for display driving.
Referring to fig. 5 and 7, the reference voltage of the corresponding cathode in the OLED display panel is-3.5V. When the display brightness command DBV is 400h, it is determined that the target voltage of the corresponding cathode is-3.1V, and a plurality of adjustment voltages (which are-3.4V, -3.3V, and-3.2V in order). The gray scale voltage Vdata is thus adjusted from Vdata1 to Vdata2 (corresponding to DBV400h), and then the cathode voltage ELVSS is gradually adjusted from the reference voltage-3.5V to the target voltage-3.1V according to a plurality of adjustment voltages, so that the driving current I of the corresponding OLED can be made to bedFrom Id1Slowly changing to Id3(Id1→Id2→Id21→Id22→Id23→Id3). At this stage, the drive current I of the OLEDdThe display brightness of the corresponding OLED is changed slowly, so that the display brightness of the OLED display panel is changed smoothly, and the phenomenon that the OLED display panel flickers at the stage is effectively avoided.
In addition, in still other embodiments, referring to fig. 6 and 7, the adjusting voltages can be segmented into at least two equal difference series with different difference values according to the difference between the adjusting voltages and the target voltage. For example, the plurality of regulated voltages includes a first segment of-3.5V to-3.2V (including-3.4V, -3.3V, -3.2V) with a difference of 0.1V, and a second segment of-3.2V to-3.1V (including-3.2V, -3.15V) with a difference of 0.05V. Here, the reference voltage was-3.5V, and the target voltage was-3.1V. That is, the closer to the threshold voltage of minus 3.0V corresponding to the cathode of the OLED, the smaller the difference between two adjacent adjustment voltages, so that the fine adjustment of the voltage of the cathode of the OLED can be realized.
When the display brightness command DBV is 400h, the cathode voltage ELVSS is gradually adjusted from the reference voltage-3.5V to the target voltage-3.1V according to a plurality of adjusting voltages, so that the driving current I of the corresponding OLED can be enableddFrom Id1Slowly changing to Id3(Id1→Id2→Id21→Id22→Id23→Id231→Id3). At this stage, the drive current I of the OLEDdThe display brightness of the corresponding OLED is changed slowly, so that the display brightness of the OLED display panel is changed smoothly, and the phenomenon that the OLED display panel flickers at the stage is effectively avoided.
In addition, the adjustment period for gradually adjusting the reference voltage of the cathode to the target voltage is generally shorter than the display period of one frame of the display screen. Specifically, as shown in fig. 8, in the preparation stage, image information of a frame of display image is received, and the DDIC performs information processing to output a voltage adjustment command to the PMIC, where the period of time corresponding to the stage is TstartSatisfies 0.35ms<Tstart<13 ms. In the voltage regulation stage, the PMIC gradually regulates the cathode voltage ELVSS according to each regulated voltage. In the stage, different voltages correspond to different first pulse numbers, and each voltage takes a flag bit pulse (flag) as an end node, wherein the duration corresponding to each first pulse is about 10 μ s, and the duration corresponding to each flag bit pulse (flag) is about 10 μ s. The voltages here include a reference voltage, a plurality of adjustment voltages, and a target voltage. The first pulse and the flag pulse have different duty cycles.
When the reference voltage is-3.5V, the plurality of adjustment voltages are-3.4V, -3.3V and-3.2V, and the target voltage is-3.1V, the adjustment time periods corresponding to the respective voltages are shown in Table 1.
TABLE 1
Regulating voltage Number of first pulse Adjusting duration
-3.5V 26 T1＝260μs
-3.4V 27 T2＝270μs
-3.3V 28 T3＝280μs
-3.2V 29 T4＝290μs
-3.1V 30 T5＝300μs
After the cathode voltage ELVSS is adjusted to the target voltage-3.1, entering an ending stage, wherein the corresponding time length of the ending stage is TstopSatisfy Tstop≥100us。
From this, it is known that the adjustment period T for gradually adjusting the reference voltage to-3.5V to the target voltage to-3.1Vtotal＝Tstart+T1+T2+T3+T4+T5+Tflag×5+Tstop11.55 ms. The display duration of one frame of display picture is usually 16ms, and the adjustment duration is less than the display duration of one frame of display picture, so that the adjustment process of the cathode voltage ELVSS in the OLED display panel can be ensured not to be perceived by human eyes, and the visual experience of the OLED display panel can be improved.
The display driving of the OLED display panel is only schematically described with respect to the voltage adjustment of the cathode voltage and the adjustment time period thereof, and other portions related to the display driving refer to the descriptions of some of the aforementioned embodiments, and are not described in detail herein.
Some embodiments of the present disclosure provide a driving apparatus of an OLED display panel. Referring to fig. 2, the driving apparatus of the OLED Display panel includes a Display Driver Integrated Circuit (DDIC) 1 and a Power Management Integrated Circuit (PMIC) 2. The display driving integrated circuit 2 is electrically connected to the cathode in the OLED display panel 3, and is configured to obtain a reference voltage and a target voltage of the cathode according to the display luminance value instruction, and determine a plurality of adjustment voltages in a staircase distribution according to the reference voltage and the target voltage to provide a corresponding voltage adjustment instruction. The power management integrated circuit 2 is electrically connected to the display driving integrated circuit 1 and the cathode, and is configured to receive a voltage adjustment instruction and gradually adjust the reference voltage of the cathode to a target voltage according to the voltage adjustment instruction.
In some embodiments of the present disclosure, the display driving integrated circuit 1 is further configured to pre-store gamma parameters corresponding to a plurality of adjustment voltages one to one, and drive the OLED display panel to display according to the corresponding gamma parameters when the voltage of the cathode is a certain adjustment voltage.
Here, the structures of the display driver ic 1 and the power management ic 2 may be selected according to actual requirements. The embodiments of the present disclosure are not limited thereto.
The driving device of the OLED display panel provided in some embodiments of the present disclosure can implement the driving method of the OLED display panel in the above embodiments, and the beneficial effects that can be achieved by the driving device of the OLED display panel provided in some embodiments are the same as those achieved by the driving method of the OLED display panel provided in some embodiments, and are not described herein again.
Some embodiments of the present disclosure provide an OLED display device. The OLED display device includes an OLED display panel and a driving device electrically connected thereto as described in the above embodiments.
For example, the OLED display device may be an electronic product such as a mobile phone, a television, a computer, a tablet, a camera, etc. using the OLED display panel.
The beneficial effects that can be achieved by the OLED display device provided in some embodiments of the present disclosure are the same as the DTFT beneficial effects that can be achieved by the driving device of the OLED display panel provided in some embodiments, and are not described herein again.
Some embodiments of the present disclosure provide a computer-readable storage medium. The computer readable storage medium stores computer program instructions. The computer program instructions, when executed on a processor, cause the processor to perform one or more steps of the method of driving an OLED display panel as described in the above embodiments.
By way of example, such computer-readable storage media may include, but are not limited to: magnetic storage devices (e.g., hard Disk, floppy Disk, magnetic tape, etc.), optical disks (e.g., CD (Compact Disk), DVD (Digital versatile Disk), etc.), smart cards, and flash Memory devices (e.g., EPROM (Erasable Programmable Read-Only Memory), card, stick, key drive, etc.). Various computer-readable storage media described in this disclosure can represent one or more devices and/or other machine-readable storage media for storing information. The term "machine-readable storage medium" can include, without being limited to, wireless channels and various other media capable of storing, containing, and/or carrying instruction(s) and/or data.
The beneficial effects that can be achieved by the computer-readable storage medium provided by some embodiments of the present disclosure are the same as those that can be achieved by the driving method of the OLED display panel provided by some embodiments, and are not described herein again.
In the foregoing description of embodiments, the particular features, structures, materials, or characteristics may be combined in any suitable manner in any one or more embodiments or examples.
The above description is only for the specific embodiments of the present disclosure, but the scope of the present disclosure is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present disclosure should be covered within the scope of the present disclosure. Therefore, the protection scope of the present disclosure shall be subject to the protection scope of the claims.

Claims (8)

1. A method for driving an OLED display panel, comprising:
acquiring reference voltage of a corresponding cathode in an OLED display panel;
receiving a display brightness instruction, and determining a target voltage of the cathode according to the display brightness instruction;
determining a plurality of regulating voltages in a step distribution according to the reference voltage and the target voltage;
and gradually adjusting the reference voltage to the target voltage according to the plurality of adjustment voltages.
2. The method of driving an OLED display panel according to claim 1,
the voltage values of the plurality of regulating voltages are in an arithmetic progression;
or, the voltage values of the plurality of regulating voltages are segmented into at least two equal difference number columns with different difference values.
3. The method of driving an OLED display panel according to claim 1, further comprising:
prestoring gamma parameters corresponding to the regulating voltages one by one;
and under the condition that the voltage of the cathode is a certain regulating voltage, driving the OLED display panel to display according to the corresponding gamma parameter.
4. The method for driving the OLED display panel according to any one of claims 1 to 3,
gradually adjusting the reference voltage to the adjustment duration of the target voltage, which is less than the display duration of a frame of display picture;
or, the adjusting time length of gradually adjusting the reference voltage to the target voltage is less than or equal to the frame blanking time length of one frame of display picture.
5. A driving apparatus of an OLED display panel, comprising:
a display driving integrated circuit electrically connected to a cathode in the OLED display panel, configured to: acquiring a reference voltage and a target voltage of the cathode according to a display brightness value instruction, and determining a plurality of regulating voltages in step distribution according to the reference voltage and the target voltage to provide a corresponding voltage regulating instruction;
a power management integrated circuit electrically connected to the display driver integrated circuit and the cathode, configured to: and receiving the voltage regulation instruction, and gradually regulating the reference voltage of the cathode to the target voltage according to the voltage regulation instruction.
6. The driving apparatus of the OLED display panel according to claim 5, wherein the display driving integrated circuit is further configured to: and pre-storing gamma parameters corresponding to the regulating voltages one by one, and driving the OLED display panel to display according to the corresponding gamma parameters under the condition that the voltage of the cathode is a certain regulating voltage.
7. An OLED display device, comprising:
an OLED display panel;
the driving apparatus of claim 5 or 6 electrically connected to the OLED display panel.
8. A computer-readable storage medium, wherein the computer-readable storage medium stores computer program instructions; the computer program instructions, when executed on a processor, cause the processor to perform one or more steps of a method of driving an OLED display panel as claimed in any one of claims 1 to 4.
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