CN117409711A

CN117409711A - Driving method, driving device, storage medium and display apparatus

Info

Publication number: CN117409711A
Application number: CN202310430778.5A
Authority: CN
Inventors: 冯林; 陈羿恺
Original assignee: Shenzhen TCL New Technology Co Ltd
Current assignee: Shenzhen TCL New Technology Co Ltd
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2024-01-16

Abstract

The embodiment of the application discloses a driving method, a driving device, a storage medium and a display device, wherein the display device comprises a display screen, the display screen comprises a plurality of luminous pixel units, each luminous pixel unit comprises a luminous subunit and a control subunit which are connected with each other, each luminous subunit comprises a luminous diode and a light control thin film transistor which are connected with each other, the control subunit is used for controlling the light control thin film transistor, and the driving method comprises the following steps: acquiring the use time of a display screen; obtaining the starting voltage of the light control thin film transistor according to the using time length and the first characteristic curve; and obtaining a driving voltage according to the starting voltage of the light control thin film transistor, and driving the light emitting subunit to display by using the driving voltage. According to the embodiment of the application, the driving voltage can be reasonably set to drive the light-emitting sub-unit to display, so that the redundant voltage borne by the light control thin film transistor is reduced, and the power consumption of the display screen is reduced.

Description

Driving method, driving device, storage medium and display apparatus

Technical Field

The present disclosure relates to the field of display technologies, and in particular, to a driving method, a driving device, a storage medium, and a display device.

Background

The organic light emitting diode (organic light emitting display, OLED) display screen has the advantages of self-luminescence, low driving voltage, high luminous efficiency, short response time, high contrast, ultra-large visual angle, wide use temperature range, flexible display, large-area full-color display and the like, and is known as the display screen with the most development potential in the industry. The OLED display screen is internally provided with a plurality of luminous pixel units which are arranged in an array mode, each luminous sub-pixel comprises a luminous sub-unit, each luminous sub-unit comprises a luminous diode and a light control thin film transistor which are connected with each other, if the driving voltage for driving the luminous sub-unit is too high, redundant voltage can be borne by the light control thin film transistors, and therefore the temperature rise of the light control thin film transistors can be increased, the service life of the display screen is prolonged, and the power consumption is increased.

Disclosure of Invention

The embodiment of the application provides a driving method, a driving device, a storage medium and display equipment, wherein driving voltage can be reasonably set for driving a light emitting subunit to display, so that redundant voltage borne by a light control thin film transistor is reduced, and power consumption of the display equipment is reduced.

In a first aspect, an embodiment of the present application provides a driving method, applied to a display device, where the display device includes a display screen, where the display screen includes a plurality of light emitting pixel units, each light emitting pixel unit includes a light emitting sub-unit and a control sub-unit, where the light emitting sub-unit includes a light emitting diode and a light control thin film transistor that are connected to each other, and the control sub-unit is configured to control the light control thin film transistor, where the driving method includes:

Acquiring the use time of the display screen;

obtaining the starting voltage of the light control thin film transistor according to the using time length and the first characteristic curve;

and obtaining a driving voltage according to the starting voltage of the light control thin film transistor, and driving the light emitting subunit to display by using the driving voltage.

Optionally, the obtaining a driving voltage according to the on voltage of the light control thin film transistor, and driving the light emitting subunit to display by using the driving voltage includes:

acquiring the pixel peak brightness of the current frame image signal of the display screen;

obtaining the forward conducting voltage of the light emitting diode according to the pixel peak brightness and the second characteristic curve;

and obtaining a driving voltage according to the starting voltage of the light control thin film transistor and the forward conducting voltage of the light emitting diode, and driving the light emitting subunit to display by using the driving voltage.

Optionally, the light emitting diodes include a plurality of types of light emitting diodes, the light emitting diodes of different types have different light emitting colors, the driving voltage is obtained according to the turn-on voltage of the light controlling thin film transistor, and the driving the light emitting subunit to display includes:

Acquiring forward conduction voltages corresponding to different types of light emitting diodes;

and obtaining a driving voltage according to the starting voltage of the light control thin film transistor and the forward conducting voltage of the light emitting diodes of different types, and driving the light emitting subunit to display by using the driving voltage.

Optionally, the light emitting diodes include a plurality of types of light emitting diodes, the light emitting diodes of different types have different light emitting colors, and the obtaining the forward conduction voltage of the light emitting diode according to the pixel peak brightness and the second characteristic curve includes:

obtaining a plurality of second characteristic curves, wherein each second characteristic curve corresponds to one type of light emitting diode;

and obtaining the forward conducting voltage corresponding to each type of light emitting diode according to the pixel peak brightness and each second characteristic curve.

Optionally, obtaining a driving voltage according to the turn-on voltage of the light control thin film transistor and the forward conducting voltage of the light emitting diode, and driving the light emitting subunit to display by using the driving voltage includes:

obtaining a residual voltage;

and adding the starting voltage of the light control thin film transistor, the forward conducting voltage of the light emitting diode and the residual voltage to obtain the driving voltage, and driving the light emitting subunit to display by using the driving voltage.

In a second aspect, an embodiment of the present application provides a driving method, applied to a display device, where the display device includes a display screen, where the display screen includes a plurality of light emitting pixel units, each light emitting pixel unit includes a light emitting sub-unit and a control sub-unit that are connected to each other, where the light emitting sub-unit includes a light emitting diode and a light control thin film transistor that are connected to each other, and the control sub-unit is configured to control the light control thin film transistor, where the driving method includes:

obtaining the forward conducting voltage of the light emitting diode according to the peak brightness and the second characteristic curve;

and obtaining a driving voltage according to the forward conduction voltage, and driving the light-emitting subunit to display by using the driving voltage.

Optionally, the acquiring the pixel peak brightness of the current frame image signal includes:

acquiring a histogram of a current frame image signal of the display screen;

acquiring the frame brightness duty ratio of the current frame image signal according to the histogram of the current frame image signal;

and acquiring the pixel peak brightness of the current frame image signal according to the frame brightness duty ratio.

Optionally, the light emitting diodes include a plurality of types of light emitting diodes, the light emitting diodes of different types have different light emitting colors, and the obtaining the forward conduction voltage of the light emitting diode according to the peak brightness and the second characteristic curve includes:

In a third aspect, embodiments of the present application provide a driving method, applied to a display device, where the display device includes a display screen, each light-emitting pixel unit includes a light-emitting subunit and a control subunit that are connected to each other, where the light-emitting subunit includes a light-emitting diode and a light-controlling thin film transistor that are connected to each other, and the control subunit is configured to control the light-controlling thin film transistor, where the light-emitting diode includes multiple types of light-emitting diodes, and light-emitting colors of the light-emitting diodes of different types are different, where the method includes:

In a fourth aspect, embodiments of the present application provide a driving apparatus applied to a display device, where the display screen includes a plurality of light emitting pixel units, each of the light emitting pixel units includes a light emitting sub-unit and a control sub-unit, the light emitting sub-unit includes a light emitting diode and a light control thin film transistor that are connected to each other, and the control sub-unit is configured to control the light control thin film transistor, where the driving apparatus includes:

the duration acquisition module is used for acquiring the use duration of the display screen;

the first voltage acquisition module is used for acquiring the starting voltage of the light control thin film transistor according to the using time and the first characteristic curve;

the first driving voltage module is used for obtaining driving voltage according to the starting voltage of the light control thin film transistor and driving the light emitting subunit to display by utilizing the driving voltage.

In a fifth aspect, embodiments of the present application provide a driving apparatus applied to a display device, where the display screen includes a plurality of light emitting pixel units, each of the light emitting pixel units includes a light emitting sub-unit and a control sub-unit, the light emitting sub-unit includes a light emitting diode and a light control thin film transistor that are connected to each other, and the control sub-unit is configured to control the light control thin film transistor, and the driving apparatus includes:

The brightness acquisition module is used for acquiring the pixel peak brightness of the current frame image signal of the display screen;

the second voltage acquisition module is used for obtaining the forward conduction voltage of the light emitting diode according to the peak brightness and the second characteristic curve;

and the second driving voltage module is used for obtaining driving voltage according to the forward conducting voltage and driving the light-emitting subunit to display by utilizing the driving voltage.

In a sixth aspect, embodiments of the present application provide a driving apparatus, where the display device includes a display screen, each light emitting pixel unit includes a light emitting subunit and a control subunit that are connected to each other, the light emitting subunit includes a light emitting diode and a light control thin film transistor that are connected to each other, the control subunit is configured to control the light control thin film transistor, the light emitting diode includes a plurality of types of light emitting diodes, and light emitting colors of the light emitting diodes of different types are different, and the driving apparatus includes:

the third voltage acquisition module is used for acquiring forward conduction voltages corresponding to different types of light emitting diodes;

and the third driving voltage module is used for obtaining driving voltage according to the forward conducting voltage and driving the light-emitting subunit to display by utilizing the driving voltage.

In a seventh aspect, embodiments of the present application provide a storage medium, which when executed on a computer, causes the computer to perform the driving method of any one of the above.

In an eighth aspect, an embodiment of the present application provides a display device, including a display screen, a memory, and a processor, where the processor is configured to execute the driving method according to any one of the above methods by calling a computer program stored in the memory.

According to the embodiment of the application, the use time of the display screen is obtained, and the starting voltage of the light control thin film transistor is obtained according to the use time and the first characteristic curve. The first characteristic curve is a corresponding relation between the use duration of the display screen and the starting voltage Vgs (th) of the light control thin film transistor, and as the use duration of the display screen increases, the drift voltage of the light control thin film transistor increases. That is, the turn-on voltage Vgs (th) of the light controlling thin film transistor in the embodiment of the present application varies along with the usage period of the display screen, which is a variable. The starting voltage Vgs (th) of the light control thin film transistor TFT is arranged at the front end of the life cycle of the display screen, is not required to be set according to the maximum drifting voltage, but is increased along with the gradual increase of the service time of the display screen, the corresponding driving voltage is also slowly increased, and the driving voltage is utilized to drive the light emitting subunit to display, so that the starting voltage Vgs (th) of the light control thin film transistor is reasonably set according to the service time of the display screen, the driving voltage can be reasonably set, the optimal driving voltage is obtained, the redundant voltage borne by the light control thin film transistor is reduced, the heating value of the light control thin film transistor is reduced, the life cycle of the display screen is prolonged, and the power consumed by the display screen is also reduced.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly introduced below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a schematic flow chart of a driving method according to an embodiment of the present application.

Fig. 2 is a schematic structural diagram of a light-emitting pixel unit according to an embodiment of the present application.

Fig. 3 is a schematic diagram of a drift voltage of a light-controlling thin film transistor according to an embodiment of the present application according to a change in a display screen usage time.

Fig. 4 is a schematic diagram of a second flow of the driving method according to the embodiment of the present application.

Fig. 5 is a schematic diagram of a correspondence relationship between peak brightness of a pixel and forward on voltage of a light emitting diode according to an embodiment of the present application.

Fig. 6 is a third flow chart of the driving method according to the embodiment of the present application.

Fig. 7 is a schematic diagram of a correspondence relationship between forward turn-on voltage and driving current density of different types of leds according to an embodiment of the present application.

Fig. 8 is a fourth flow chart of the driving method according to the embodiment of the present application.

Fig. 9 is a fifth flowchart of a driving method according to an embodiment of the present application.

Fig. 10 is a sixth flowchart of a driving method according to an embodiment of the present application.

Fig. 11 is a seventh flowchart of a driving method according to an embodiment of the present application.

Fig. 12 is a schematic view of a first structure of a driving device according to an embodiment of the present application.

Fig. 13 is a schematic diagram of a second structure of the driving device according to the embodiment of the present application.

Fig. 14 is a schematic view of a third structure of the driving device according to the embodiment of the present application.

Fig. 15 is a schematic diagram of a first structure of a display device according to an embodiment of the present application.

Fig. 16 is a schematic diagram of a second structure of a display device according to an embodiment of the present application.

Detailed Description

Referring to the drawings, wherein like reference numerals refer to like elements throughout, the principles of the present application are illustrated as embodied in a suitable computing environment. The following description is based on the illustrated embodiments of the present application and should not be taken as limiting other embodiments not described in detail herein.

Referring to fig. 1, fig. 1 is a schematic flow chart of a driving method applied to a display device, where a display screen includes a light-controlling thin film transistor, the driving method includes:

101, acquiring the use time of a display screen;

in 102, obtaining the starting voltage of the light control thin film transistor according to the using time length and the first characteristic curve;

at 103, a driving voltage is obtained according to the turn-on voltage of the light controlling thin film transistor, and the light emitting sub-unit is driven to display by using the driving voltage.

Referring to fig. 2, fig. 2 is a schematic structural diagram of a light emitting pixel unit according to an embodiment of the present application.

An organic light emitting diode (organic light emitting display, OLED) display screen, abbreviated as OLED screen, has the advantages of self-luminescence, low driving voltage, high luminous efficiency, short response time, high contrast, ultra-large visual angle, wide use temperature range, flexible display, large-area full-color display and the like, and is considered as the display panel with the most development potential in the industry. The OLED panel is internally provided with a plurality of luminous pixel units U1 which are arranged in an array mode, each luminous pixel unit X1 comprises a luminous subunit and a control subunit which are connected with each other, each luminous subunit comprises a luminous diode K1 and a light control thin film transistor Q1 which are connected with each other, when current flows through the luminous subunit, the luminous diode K1 emits light, and the luminous brightness is determined by the current flowing through the luminous subunit.

The control subunit is configured to control the light control thin film transistor, and illustratively includes a storage capacitor C1, a scan control thin film transistor Q2, and a calibration detection thin film transistor Q3.

Illustratively, the driving voltage ELVDD-elvss=the forward turn-on voltage Vf of the light emitting diode K1+the turn-on voltage Vgs (th) +the margin voltage of the light controlling thin film transistor TFT Q1. The margin voltage is a voltage for ensuring that the light emitting subunit can normally display reservation, for example, may be between 0.5V and 10V, and it should be noted that the margin voltage is not limited in the embodiment of the present application.

Referring to fig. 3, fig. 3 is a schematic diagram of a drift voltage of a light-controlling thin film transistor according to an embodiment of the present application, which varies with a time period of use of a display screen. As the service life of the display screen increases, the drift voltage generated by the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 increases, and then the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 also increases as the service life of the display screen increases.

In order to ensure that the light emitting sub-unit can always work normally, when the turn-on voltage Vgs (th) of the light controlling thin film transistor TFT Q1 is set, the maximum drift voltage possibly generated needs to be considered, that is, the turn-on voltage Vgs (th) of the light controlling thin film transistor TFT Q1 is always relatively large, so that the driving voltage is raised, and the raised redundant voltage is borne by the light controlling thin film transistor TFT Q1 in the pixel driving circuit, which can cause the temperature rise of the light controlling thin film transistor TFT Q1 to increase, affect the service life of the display screen and increase the power consumption.

In the embodiment of the application, the use time of the display screen is obtained, and the starting voltage of the light control thin film transistor is obtained according to the use time and the first characteristic curve.

With continued reference to fig. 3, the first characteristic curve is a correspondence between the display screen usage period and the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1, and as the display screen usage period increases, the drift voltage of the light control thin film transistor TFT Q1 increases, so that the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 also increases. For example, the first characteristic curve may be preset in the memory, and the corresponding turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 may be obtained by monitoring the operation time of the display screen and comparing the first characteristic curve.

In the front section of the life cycle of the display screen, the drift voltage of the light control thin film transistor TFT Q1 is smaller, the corresponding turn-on voltage Vgs (th) of the light control thin film transistor is also relatively smaller, and as the service life of the display screen increases, the larger the drift voltage of the light control thin film transistor TFT Q1 is, the larger the corresponding turn-on voltage Vgs (th) of the light control thin film transistor is, so that the requirement of driving the light emitting sub-unit to display can be met, that is, the turn-on voltage Vgs (th) of the light control thin film transistor in the embodiment of the application can change along with the service life of the display screen.

According to the power calculation formula p=ui, it is known that the drift voltage of the light control thin film transistor TFT Q1 increases with the increase of the operating time, and the display of the light emitting diode K1 is determined by the magnitude of the driving current, assuming that the driving current I is unchanged, the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 is not required to be set according to the maximum drift voltage at the front end of the life cycle of the display screen, but increases with the gradual increase of the operating time of the display screen, and the corresponding driving voltage ELVDD-ELVSS also slowly increases, and drives the light emitting diode K1 to display by using the driving voltage. According to the embodiment of the application, the starting voltage Vgs (th) of the light control thin film transistor TFT Q1 is reasonably set according to the service time of the display screen, so that the driving voltage can be reasonably set, the optimal driving voltage is obtained, the redundant voltage borne by the light control thin film transistor TFT Q1 is reduced, the heating value of the light control thin film transistor TFT Q1 is reduced, the life cycle of the display screen is prolonged, and the power consumed by the display screen is also reduced.

Referring to fig. 4, fig. 4 is a schematic flow chart of a driving method according to an embodiment of the present disclosure.

In 201, acquiring a use time length of a display screen;

in 202, the turn-on voltage of the light controlling thin film transistor is obtained according to the use duration and the first characteristic curve.

The display screen comprises a plurality of luminous pixel units X1, each luminous pixel unit comprises a luminous subunit and a control subunit which are connected with each other, each luminous subunit comprises a luminous diode and a light control thin film transistor which are connected with each other, and the control subunit is used for controlling the light control thin film transistor.

With continued reference to fig. 3, as the usage time of the display screen increases, the drift voltage generated by the on voltage Vgs (th) of the light control thin film transistor TFT Q1 increases, and then the on voltage Vgs (th) of the light control thin film transistor TFT Q1 also increases as the usage time of the display screen increases. For example, the first characteristic curve may be preset in the memory, and the corresponding turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 may be obtained by monitoring the operation time of the display screen and comparing the first characteristic curve.

In the front section of the life cycle of the display screen, the drift voltage of the light control thin film transistor TFT Q1 is smaller, the corresponding turn-on voltage Vgs (th) of the light control thin film transistor is also relatively smaller, and as the service life of the display screen increases, the larger the drift voltage of the light control thin film transistor TFT Q1 is, the corresponding turn-on voltage Vgs (th) of the light control thin film transistor is also relatively larger, so that the requirement of driving the light emitting sub-unit can be met, that is, the turn-on voltage Vgs (th) of the light control thin film transistor in the embodiment of the application can change along with the service life of the display screen.

According to the first characteristic curve, the starting voltage Vgs (th) of the light control thin film transistor TFT Q1 is arranged at the front end of the life cycle of the display screen, is not required to be set according to the maximum drifting voltage, but is increased along with the gradual increase of the service time of the display screen, and the corresponding driving voltage ELVDD-ELVSS is also slowly increased, so that the starting voltage Vgs (th) of the light control thin film transistor TFT Q1 is reasonably set according to the service time of the display screen, the driving voltage can be reasonably set, the optimal driving voltage is obtained, the redundant voltage borne by the light control thin film transistor TFT Q1 is reduced, the heating value of the light control thin film transistor TFT Q1 is reduced, and the power consumed by the display screen is also reduced.

In 203, obtaining the pixel peak brightness of the current frame image signal of the display screen;

in 204, the forward turn-on voltage of the light emitting diode K1 is obtained according to the pixel peak brightness and the second characteristic curve.

The display screen comprises a plurality of light-emitting pixel units X1, wherein each light-emitting pixel unit X1 comprises a light-emitting subunit and a control subunit which are connected with each other, and each light-emitting subunit comprises a light-emitting diode K1 and a light control thin film transistor Q1 which are connected with each other. The light emitting diode K1 may be an inorganic light emitting diode or an organic light emitting diode. The driving voltage ELVDD-ELVSS includes a forward turn-on voltage Vf of the light emitting diode K1, and the forward turn-on voltage Vf of the light emitting diode K1 varies with a variation of a pixel peak luminance of the current frame image signal of the display screen.

For example, according to the histogram of the current frame image signal, the proportion of the highlight part in the current frame image signal may be obtained, that is, the frame brightness ratio of the current frame image signal may be obtained, the frame brightness ratio may be understood as the ratio of the highlight light emitting pixel units to all the light emitting pixel units, the pixel peak brightness matched with the frame brightness ratio may be obtained according to the frame brightness ratio, and the forward conducting voltage of the light emitting diode K1 may be obtained according to the pixel peak brightness and the second characteristic curve. The second characteristic curve is a corresponding relation between the peak brightness of the pixel and the forward conducting voltage of the light emitting diode K1.

It can be understood that the total driving power of the power supply is limited, if the proportion of the highlight part in a frame of image is high, that is, the frame brightness ratio is high, all or most of the light-emitting pixel units of the display screen are turned on to display the highlight picture, if the peak pixel brightness value is not limited, the generated total driving power is more than the upper limit that the power supply can bear, and the heat dissipation of the display screen becomes a huge problem, therefore, different frame brightness ratios are preset to correspond to different peak pixel brightness, and the peak pixel brightness is limited, so that the total driving power is not more than the upper limit that the power supply can bear regardless of the frame brightness ratio of the current frame image signal.

Referring to fig. 5, fig. 5 is a schematic diagram of a correspondence relationship between a peak brightness of a pixel and a forward turn-on voltage of a light emitting diode according to an embodiment of the present disclosure.

When the frame brightness ratio is larger, the corresponding pixel peak brightness value is smaller, for example, when the display screen displays a full-white signal, the frame brightness ratio is close to 100%, all the light-emitting pixel units are opened to display the full-white signal, for example, the pixel peak brightness value of each light-emitting pixel unit can be limited to be about 1/5 to 1/10 of the maximum peak brightness, so that the driving power of each light-emitting pixel unit is about 1/5 to 1/10 of the maximum driving power, and the driving total power required to be consumed under the condition of full-white signal input can be ensured not to exceed the upper limit bearable by a power supply. The peak luminance of the pixel can be reduced by reducing the driving current, and accordingly, when the driving current is smaller, the turn-on voltage Vf of the corresponding light emitting diode K1 is smaller, that is, when the frame luminance ratio is 100%, it can be considered that the turn-on voltage Vf of the light emitting diode K1 is minimum at this time. When the current frame image signal of the display screen is only locally brighter, only a part of the luminous pixel units are needed to display brighter pictures, the total required total driving power is lower, the driving current of the local luminous pixel units can be increased on the premise that the total power upper limit of the power supply is not exceeded, the local brightness is improved, the contrast ratio is improved, correspondingly, when the driving current is larger, the conduction voltage Vf of the corresponding luminous diode K1 is larger, for example, when the driving current is Lu1, the conduction voltage Vf of the corresponding luminous diode K1 is Vf1, when the driving current is Lu2, the conduction voltage Vf of the corresponding luminous diode K1 is Vf2, when the driving current is Lu3, the conduction voltage Vf of the corresponding luminous diode K1 is Vf3, wherein Lu1< Lu2< Lu3, the corresponding Vf1< Vf2< Vf3, when the frame brightness ratio is close to 1%, the driving current can be maximized, for example, when the frame brightness is close to 1%, the pixel peak brightness can be maximized, and the conduction voltage of the corresponding luminous diode K1 can be considered to be maximized.

When the frame brightness ratio is close to 100%, the conduction voltage Vf of the corresponding light emitting diode K1 is the maximum value, and when the frame brightness ratio is close to 1%, the conduction voltage Vf of the corresponding light emitting diode K1 is the minimum value, so that the conduction voltage Vfn of the light emitting diode K1 is between the maximum value and the minimum value when the display screen normally plays images. For example, a plurality of levels may be set for the frame brightness ratio, the frame brightness ratio of the current frame image signal at different levels corresponds to the pixel peak brightness of different levels, and the turn-on voltage Vf of the light emitting diode K1 is obtained according to the pixel peak brightness and the second characteristic curve. That is, the turn-on voltage Vf of the light emitting diode K1 in the embodiment of the present application will vary along with the variation of the current frame image signal of the display screen, which is a variable. The forward on voltage Vf of the light emitting diode K1 is not necessarily always set at a maximum value, but varies with a variation of the frame luminance duty ratio of the current frame image signal, and thus the required driving voltage ELVDD-ELVSS also varies. According to the embodiment of the application, the forward conduction voltage Vf of the light emitting diode K1 is reasonably set according to the peak brightness of the current frame image signal of the display screen, so that the driving voltage can be reasonably set, the optimal driving voltage is obtained, the redundant voltage borne by the light control thin film transistor TFT Q1 is reduced, the heating value of the light control thin film transistor TFT Q1 is reduced, the influence on the luminous efficiency of the light emitting diode K1 is reduced, and the power consumption of the display screen is also reduced.

In 205, obtaining a margin voltage;

in 206, the driving voltage is obtained by adding the turn-on voltage of the light control thin film transistor, the forward turn-on voltage of the light emitting diode K1 and the margin voltage, and the light emitting sub-unit is driven to display by using the driving voltage.

The driving voltage ELVDD-elvss=the forward turn-on voltage Vf of the light emitting diode K1+the turn-on voltage Vgs (th) +the margin voltage of the light controlling thin film transistor TFT Q1. The margin voltage is a voltage that ensures that the light emitting subunit can be normally driven and reserved, for example, may be between 0.5V and 10V, and it should be noted that the margin voltage is not limited in the embodiment of the present application.

In the embodiment of the application, the forward conducting voltage Vf of the light emitting diode K1 and the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 are both variables, wherein the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 is changed according to the duration of the display screen, is not required to be set according to the maximum drifting voltage all the time, is changed according to the peak brightness of the current frame image signal of the display screen, is not required to be set according to the maximum forward conducting voltage all the time, and therefore redundant driving voltages can be reduced as much as possible, optimal driving voltages are obtained, redundant voltages borne by the light control thin film transistor TFT Q1 are reduced, the heating value of the light control thin film transistor TFT Q1 is reduced, the influence on the luminous efficiency of the light emitting diode K1 is reduced, the life cycle of the display screen is prolonged, and the power consumed by the display screen is also reduced.

Referring to fig. 6, fig. 6 is a third flow chart of the driving method according to the embodiment of the present application.

In 301, acquiring a use time length of a display screen;

in 302, the turn-on voltage of the light controlling thin film transistor is obtained according to the use duration and the first characteristic curve.

The display screen comprises a plurality of luminous pixel units, each luminous pixel unit comprises a luminous subunit and a control subunit which are connected with each other, each luminous subunit comprises a luminous diode and a light control thin film transistor which are connected with each other, and the control subunit is used for controlling the light control thin film transistor.

The first characteristic curve is a correspondence between a display screen usage period and a turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1, please continue to refer to fig. 3, and as the display screen usage period increases, a drift voltage of the light control thin film transistor TFT Q1 increases. For example, the first characteristic curve may be preset in the memory, and the corresponding turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 may be obtained by monitoring the operation time of the display screen and comparing the first characteristic curve.

In 303, obtaining forward turn-on voltages corresponding to different types of light emitting diodes;

in this embodiment, considering that the pixels of the display screen are composed of multiple types of light emitting diodes K1, the light emitting colors of the different types of light emitting diodes K1 are different, and the forward turn-on voltages Vf of the light emitting diodes K1 of the different colors are greatly different, please refer to fig. 7, and fig. 7 is a schematic diagram of the correspondence between the forward turn-on voltages and the driving current densities of the different types of light emitting diodes provided in this embodiment. The curve L1 is a schematic diagram of a correspondence between a forward conduction voltage and a driving current density of the red light emitting diode, the curve L2 is a schematic diagram of a correspondence between a forward conduction voltage and a driving current density of the green light emitting diode, and the curve L3 is a schematic diagram of a correspondence between a forward conduction voltage and a driving current density of the blue light emitting diode. At the same driving current density, the forward turn-on voltage required for the red light emitting diode is smaller than the forward turn-on voltage required for the green light emitting diode, which is smaller than the forward turn-on voltage required for the blue light emitting diode. Therefore, if the light emitting diodes K1 of multiple colors use the same set of forward turn-on voltages, in order to make all the light emitting diodes K1 work normally, the largest forward turn-on voltage is required to be selected from the light emitting diodes of multiple colors for driving the light emitting diodes K1 to display, so that a larger redundant voltage is carried on the light control thin film transistor TFT Q1, and the loss of the light control thin film transistor TFT Q1 is also larger. Therefore, the embodiments of the present application respectively obtain the corresponding forward turn-on voltages for the different types of light emitting diodes K1.

In 304, a margin voltage is obtained; ^{residual voltage}

In 305, the driving voltage is obtained by adding the turn-on voltage of the light controlling thin film transistor, the forward turn-on voltage of the different types of light emitting diodes K1 and the margin voltage, and the light emitting sub-unit is driven to display by using the driving voltage.

The driving voltage ELVDD-elvss=the forward turn-on voltage Vf of the light emitting diode K1+the turn-on voltage Vgs (th) +the margin voltage of the light controlling thin film transistor TFT Q1. The margin is a reserved voltage for ensuring that the light emitting subunit can work normally, for example, the margin voltage can be between 0.5V and 10V, and it should be noted that the embodiment of the application does not limit the margin voltage.

In the embodiment of the application, the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 is changed according to the use duration of the display screen, the setting is not required to be always performed according to the maximum drifting voltage, and different forward turn-on voltages Vf are set for the light emitting diodes K1 with different colors, so that the turn-on voltage Vgs (th) of the light control thin film transistor, the forward turn-on voltage of the light emitting diode K1 and the residual voltage are added to obtain the driving voltage more reasonably, the residual driving voltage can be reduced as much as possible, the optimal driving voltage is obtained, the heating value of the light control thin film transistor TFT Q1 is reduced, the influence on the luminous efficiency of the light emitting diode K1 is reduced, the life cycle of the display screen is prolonged, and the power consumed by the display screen is also reduced.

Referring to fig. 8, fig. 8 is a fourth flowchart of a driving method according to an embodiment of the present disclosure.

In 401, acquiring a use time length of a display screen;

in 402, the turn-on voltage of the light controlling thin film transistor is obtained according to the use duration and the first characteristic curve.

The OLED panel is internally provided with a plurality of pixels which are arranged in an array mode, and each pixel is driven by an OLED pixel driving circuit.

According to the first characteristic curve, the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 is not required to be set according to the maximum drift voltage at the front end of the life cycle of the display screen, but is increased along with the gradual increase of the service time of the display screen, and the driving voltage ELVDD-ELVSS of the corresponding pixel driving circuit is also slowly increased.

In 403, obtaining the pixel peak brightness of the current frame image signal of the display screen;

in 404, a plurality of second characteristic curves are obtained, and each second characteristic curve corresponds to a type of light emitting diode;

in 405, a forward turn-on voltage corresponding to each type of led is obtained according to the pixel peak brightness and each second characteristic curve.

The driving voltage ELVDD-ELVSS includes a forward turn-on voltage Vf of the light emitting diode K1, and the forward turn-on voltage Vf of the light emitting diode K1 varies with a variation of a pixel peak luminance of the current frame image signal of the display screen.

For example, the proportion of the highlight in the current frame image signal may be obtained from the histogram of the current frame image signal, that is, the frame luminance duty of the current frame image signal may be obtained, the frame luminance duty may be understood as the duty of the highlight pixels to all the pixels, and the peak luminance of the pixel matching the frame luminance duty may be obtained from the frame luminance duty.

The light emitting diodes K1 include a plurality of types of light emitting diodes K1, the light emitting colors of the different types of light emitting diodes K1 are different, and the forward turn-on voltages Vf of the different colors of light emitting diodes K1 are greatly different, so that the different types of light emitting diodes K1 correspond to different second characteristic curves, and each second characteristic curve corresponds to one type of light emitting diode K1.

And obtaining the forward on voltage of each light emitting diode K1 according to the pixel peak brightness and each second characteristic curve. Each second characteristic curve is the corresponding relation between the peak brightness of the pixel and the conducting voltage of the light emitting diode with the corresponding color.

With continued reference to fig. 7, for example, with the same driving current, the forward turn-on voltage required by the red led is smaller than the forward turn-on voltage required by the green led, which is smaller than the forward turn-on voltage required by the blue led. Therefore, if the light emitting diodes K1 of multiple colors use the same set of forward turn-on voltages, in order to make all the light emitting diodes K1 work normally, the largest forward turn-on voltage is required to be selected from the light emitting diodes of multiple colors for driving the light emitting diodes K1 to display, so that a larger redundant voltage is carried on the light control thin film transistor TFT Q1, and the loss of the light control thin film transistor TFT Q1 is also larger.

Therefore, according to the embodiment of the application, the corresponding second characteristic curves are obtained for the different types of the light emitting diodes K1 respectively, and the forward conduction voltage Vf of the light emitting diode K1 is obtained according to the peak brightness of the current frame image signal of the display screen and the second characteristic curves, so that the forward conduction voltage Vf of the light emitting diode K1 in the embodiment is related to not only the self color type but also the peak brightness of the current frame image signal of the display screen, and the obtained forward conduction voltage Vf of the light emitting diode K1 is more attached to the forward conduction voltage actually required by the light emitting diode K1, and redundant voltage is reduced.

In 406, a margin voltage is obtained;

in 407, the turn-on voltage of the light controlling thin film transistor, the forward turn-on voltage of the different light emitting diodes, and the margin voltage are added to obtain a driving voltage, and the driving voltage is used to drive the light emitting subunit to display.

The driving voltage ELVDD-elvss=the forward turn-on voltage Vf of the light emitting diode K1+the turn-on voltage Vgs (th) +the margin voltage of the light controlling thin film transistor TFT Q1. The residual voltage is a voltage that ensures that the light emitting diode can work normally, for example, may be between 0.5V and 10V, and it should be noted that the residual voltage is not limited in the embodiment of the present application.

In this embodiment of the present application, the forward turn-on voltage Vf of the light emitting diode K1 and the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 are both variables, where the turn-on voltage Vgs (th) of the light control thin film transistor TFT Q1 is changed according to the duration of the display screen, and is not required to be set according to the maximum drift voltage all the time, and the forward turn-on voltage Vf of the light emitting diode K1 is changed according to the peak brightness of the current frame image signal of the display screen, and is related to the self color class, and is not required to be set according to the maximum forward turn-on voltage, so that the redundant driving voltage can be reduced as much as possible, and the optimal driving voltage is obtained, thereby reducing the redundant voltage borne by the light control thin film transistor TFT Q1, reducing the influence on the light emitting efficiency of the light control thin film transistor TFT Q1, prolonging the life cycle of the display screen, and also reducing the heat productivity consumed by the display screen.

Referring to fig. 9, fig. 9 is a fifth flowchart of a driving method according to an embodiment of the present disclosure.

In 501, acquiring a pixel peak brightness of a current frame image signal;

in 502, obtaining a forward turn-on voltage of the light emitting diode according to the peak brightness and the second characteristic curve;

In 503, a driving voltage is obtained according to the forward conduction voltage, and the light emitting diode is driven by the driving voltage.

The pixel driving power supply voltage ELVDD-ELVSS includes a forward turn-on voltage Vf of the light emitting diode K1, and the forward turn-on voltage Vf of the light emitting diode K1 varies with a variation of a highlight proportion of the current frame image signal of the display screen.

It can be understood that the total driving power of the power supply is limited, if the duty ratio of the highlight picture in a frame of image is very high, that is, the frame brightness duty ratio is understood as the duty ratio of the highlight pixel units to all the light emitting pixel units, all the light emitting pixel units or most of the light emitting pixel units of the display screen display the highlight picture, if the peak brightness value of the pixel is not limited, the generated total driving power is likely to exceed the upper limit which can be born by the power supply, and the heat dissipation of the display screen also becomes a huge problem, therefore, different peak brightness values of the pixel corresponding to different frame brightness duty ratios need to be preset, and the peak brightness value of the pixel needs to be limited, so that the total driving power cannot exceed the upper limit which can be born by the power supply regardless of the frame brightness duty ratio of the current frame image signal. The frame brightness ratio and the pixel peak brightness value may be in inverse relation, when the frame brightness ratio is larger, the corresponding pixel peak brightness value is smaller, for example, when the display screen displays a full-white signal, the frame brightness ratio is close to 100%, all the light-emitting pixel units are used for displaying the full-white signal, for example, the pixel peak brightness value of each light-emitting pixel unit can be limited to be about 1/5-1/10 of the maximum pixel peak brightness of the light-emitting pixel unit, so that the driving power of each light-emitting pixel unit is about 1/5-1/10 of the maximum driving power, and the driving total power required to be consumed under the condition of full-white signal input can be ensured not to exceed the upper limit bearable by a power supply. The peak pixel luminance can be reduced by reducing the driving current of the light emitting pixel unit, and accordingly, when the driving current is smaller, the turn-on voltage Vf of the corresponding light emitting diode K1 is smaller, that is, when the frame luminance ratio is 100%, the turn-on voltage of the corresponding light emitting diode K1 is considered to be minimum.

When the current frame image signal of the display screen is only locally brighter, only part of the luminous pixel units are needed to be turned on to display brighter pictures, the total driving total power needed is lower, the driving current of the local luminous pixel units can be increased on the premise that the upper limit of the total power of the power supply is not exceeded, the local brightness is improved, the contrast ratio is improved, and correspondingly, when the driving current is larger, the conduction voltage Vf of the corresponding light emitting diode is larger. For example, when the frame luminance ratio is close to 1%, the driving current may be maximized at this time, so that the pixel peak luminance is maximized, and it may be considered that the on-voltage of the light emitting diode is also maximized at this time.

The histogram of the current frame image signal of the display screen is obtained, namely, the duty ratio of a highlight picture in the current frame image signal is obtained, namely, the frame brightness duty ratio of the current frame image signal is obtained, the frame brightness duty ratio can be understood as the duty ratio of the highlight luminous pixel units to all luminous pixel units, the peak brightness of the pixel matched with the frame brightness duty ratio is obtained according to the frame brightness duty ratio, and the forward conducting voltage of the light emitting diode K1 is obtained according to the peak brightness of the pixel and the second characteristic curve. The second characteristic curve is a correspondence between the peak brightness of the pixel and the turn-on voltage Vf of the light emitting diode K1.

When the frame brightness ratio is close to 100%, the on voltage Vf of the corresponding light emitting diode K1 is the maximum value, and when the frame brightness ratio is close to 1%, the on voltage Vf of the corresponding light emitting diode K1 is the minimum value, so that the on voltage Vfn of the light emitting diode K1 is between the maximum value and the minimum value when the display screen normally plays images. For example, a plurality of levels may be set for the frame brightness ratio, the frame brightness ratios of different levels of the current frame image signal correspond to the pixel peak brightness of different levels, and then the turn-on voltage Vf of the light emitting diode K1 is obtained according to the pixel peak brightness and the second characteristic curve, that is, the turn-on voltage Vf of the light emitting diode K1 in the embodiment of the present application changes along with the change of the current frame image signal of the display screen, which is a variable. The turn-on voltage Vf of the light emitting diode K1 is not necessarily always set according to the maximum value Vf3, but varies with the variation of the frame luminance duty ratio of the current frame image signal, so the driving voltage ELVDD-ELVSS also varies accordingly, and the light emitting sub-unit is driven to display using the driving voltage. Therefore, in the normal display process of the display screen, the power consumed by the display screen can be effectively reduced, the heating value of the light control thin film transistor TFT can be reduced, and the life cycle of the display screen is prolonged.

Referring to fig. 10, fig. 10 is a sixth flowchart of a driving method according to an embodiment of the present disclosure.

The light emitting diodes K1 include a plurality of types of light emitting diodes K1, and the light emitting colors of the different types of light emitting diodes K1 are different.

In 601, obtaining forward on voltages corresponding to different types of light emitting diodes;

in 602, a driving voltage is obtained according to the forward conduction voltage, and the light emitting diode display is driven by the driving voltage.

The driving voltage ELVDD-ELVSS includes the forward turn-on voltage Vf of the light emitting diode K1, and in this embodiment, it is considered that the light emitting diodes K1 of different types emit light with different colors, and the forward turn-on voltage Vf of the light emitting diode K1 of different colors is greatly different, and please continue to refer to fig. 7, for example, the same driving current density, the forward turn-on voltage required by the red light emitting diode is smaller than the forward turn-on voltage required by the green light emitting diode, and the forward turn-on voltage required by the green light emitting diode is smaller than the forward turn-on voltage required by the blue light emitting diode. Therefore, if the same set of forward turn-on voltages is used for the leds K1 of multiple colors, in order to enable all the leds K1 to operate normally, the largest forward turn-on voltage is required to be selected from the leds K1 of multiple colors for driving the leds K1 to display, so that larger redundant voltages are carried on the light control TFT, and the loss of the light control TFT is also larger.

Therefore, the embodiments of the present application respectively obtain the corresponding forward on voltages for the different types of light emitting diodes K1, and obtain the driving voltages according to the forward on voltages, and drive the corresponding light emitting diodes K1 by using the driving voltages, so as to reduce the redundant on voltages on the light control thin film transistor TFT caused by the light emitting diodes K1 of different colors. The turn-on voltage Vf of the light emitting diode K1 is set by the self-color class, so that the driving voltage ELVDD-ELVSS is also set by the self-color class of the light emitting diode K1. Therefore, in the normal display process of the display screen, as the light emitting diodes K1 with different colors respectively adopt different optimal driving voltages, the light control thin film transistor TFT can not generate redundant starting voltage due to different colors, thereby reducing the heating value of the light control thin film transistor TFT and the light emitting diode K1 and prolonging the life cycle of the display screen.

Referring to fig. 11, fig. 11 is a seventh flowchart of a driving method according to an embodiment of the present disclosure.

In 701, obtaining pixel peak brightness of a current frame image signal of a display screen;

in 702, a plurality of second characteristic curves are obtained, and each second characteristic curve corresponds to a type of light emitting diode;

In 703, a forward turn-on voltage corresponding to each type of led is obtained according to the pixel peak brightness and each second characteristic curve.

At 704, a driving voltage is obtained according to the forward conduction voltage, and the light emitting sub-unit is driven to display by the driving voltage.

The driving voltage ELVDD-ELVSS includes a forward turn-on voltage Vf of the light emitting diode, which varies with a variation of a highlight duty of the current frame image signal of the display screen.

For example, the duty ratio of the highlight picture in the current frame image signal, that is, the frame luminance duty ratio of the current frame image signal image, may be obtained from the histogram of the current frame image signal, and the peak luminance of the pixel matching the frame luminance duty ratio may be obtained from the frame luminance duty ratio.

The different light emitting sub-units may be composed of different types of light emitting diodes, the light emitting colors of the different types of light emitting diodes are different, and the forward turn-on voltages Vf of the different colors of light emitting diodes are greatly different, so that the different types of light emitting diodes correspond to different second characteristic curves, and each second characteristic curve corresponds to one type of light emitting diode.

And obtaining the forward on voltage of each LED according to the pixel peak brightness and each second characteristic curve. Each second characteristic curve is the corresponding relation between the peak brightness of the pixel and the conducting voltage of the light emitting diode with the corresponding color.

With continued reference to fig. 7, for example, at the same driving current density, the forward turn-on voltage required by the red led is smaller than the forward turn-on voltage required by the green led, which is smaller than the forward turn-on voltage required by the blue led. Therefore, if the same set of forward turn-on voltages is used for the leds of multiple colors, in order to enable all the leds to work normally, the largest forward turn-on voltage is required to be selected from the leds of multiple colors for driving the leds to display, so that larger redundant voltages are carried on the light control TFT, and the loss of the light control TFT is also larger.

Therefore, the embodiments of the present application respectively obtain the corresponding second characteristic curves for different types of light emitting diodes, and obtain the forward conduction voltage Vf of the light emitting diode according to the peak brightness of the current frame image signal of the display screen and the second characteristic curve, so that the forward conduction voltage Vf of the light emitting diode in the embodiments is not only related to the self color type, but also related to the peak brightness of the current frame image signal of the display screen, so that the obtained forward conduction voltage Vf of the light emitting diode is dynamically changed and is more attached to the forward conduction voltage actually required by the light emitting diode, thereby reducing the redundant voltage borne by the light control thin film transistor TFT, reducing the heat productivity of the light control thin film transistor TFT, reducing the influence on the light emitting efficiency of the light emitting diode, prolonging the life cycle of the display screen, and also reducing the power consumed by the display screen.

Referring to fig. 12, fig. 12 is a schematic diagram of a first structure of a driving device according to an embodiment of the present disclosure. The driving apparatus 810 is applied to a display device including a display screen including a plurality of light emitting pixel units, each of the light emitting pixel units including a light emitting sub-unit and a control sub-unit, the light emitting sub-unit including a light emitting diode and a light controlling thin film transistor, the control sub-unit for controlling the light controlling thin film transistor, the driving apparatus 810 includes: a duration acquisition module 811, a first voltage acquisition module 812, a first driving voltage module 813.

The duration acquisition module 811 is configured to: acquiring the use time of a display screen;

the first voltage acquisition module 812 is configured to: obtaining the starting voltage of the light control thin film transistor according to the using time length and the first characteristic curve;

the first driving voltage module 813 is for: and obtaining a driving voltage according to the starting voltage of the light control thin film transistor, and driving the light emitting subunit to display by using the driving voltage.

In one embodiment, the first driving voltage module 813 may be used to: acquiring the pixel peak brightness of the current frame image signal of the display screen; obtaining the forward conduction voltage of the light emitting diode according to the pixel peak brightness and the second characteristic curve; and obtaining a driving voltage according to the starting voltage of the light control thin film transistor and the forward conducting voltage of the light emitting diode, and driving the light emitting subunit to display by using the driving voltage.

In one embodiment, the light emitting diodes include a plurality of types of light emitting diodes, and the light emitting colors of the different types of light emitting diodes are different, and the first driving voltage module 813 may be used to: acquiring forward conduction voltages corresponding to different types of light emitting diodes;

In one embodiment, the light emitting diodes include a plurality of types of light emitting diodes, and the light emitting colors of the different types of light emitting diodes are different, and the first driving voltage module 813 may be used to: obtaining a plurality of second characteristic curves, wherein each second characteristic curve corresponds to one type of light emitting diode;

and obtaining the forward on voltage of each LED according to the pixel peak brightness and each second characteristic curve.

In one embodiment, the first driving voltage module 813 may be used to: obtaining a residual voltage; and adding the starting voltage of the light control thin film transistor, the forward conducting voltage of the light emitting diode and the residual voltage to obtain a driving voltage, and driving the light emitting subunit to display by using the driving voltage.

Referring to fig. 13, fig. 13 is a schematic diagram of a second structure of a driving device according to an embodiment of the present disclosure. The driving apparatus 820 is applied to a display device including a display screen including a plurality of light emitting pixel units, each of the light emitting pixel units including a light emitting sub-unit and a control sub-unit, the light emitting sub-unit including a light emitting diode and a light controlling thin film transistor, the control sub-unit for controlling the light controlling thin film transistor, the driving apparatus 820 includes: a brightness acquisition module 821, a second voltage acquisition module 822, and a second driving voltage module 823.

The luminance acquisition module 821 is configured to: acquiring the pixel peak brightness of the current frame image signal of the display screen;

the second voltage acquisition module 822 is configured to: obtaining the forward conducting voltage of the light emitting diode according to the peak brightness and the second characteristic curve;

the second driving voltage module 823 is configured to: and obtaining a driving voltage according to the forward conduction voltage, and driving the light-emitting subunit to display by using the driving voltage.

In one embodiment, the brightness acquisition module 821 may be configured to: acquiring a histogram of a current frame image signal of a display screen; acquiring the frame brightness duty ratio of the current frame image signal according to the histogram of the current frame image signal; and acquiring the pixel peak brightness of the current frame image signal according to the frame brightness duty ratio.

In one embodiment, the light emitting diodes include a plurality of types of light emitting diodes, and the second voltage acquisition module 822 may be configured to: obtaining a plurality of second characteristic curves, wherein each second characteristic curve corresponds to one type of light emitting diode; and obtaining the forward on voltage of each LED according to the pixel peak brightness and each second characteristic curve.

Referring to fig. 14, fig. 14 is a schematic diagram of a third structure of a driving device according to an embodiment of the present disclosure. The driving apparatus 830 is applied to a display device, the display device includes a display screen, each light emitting pixel unit includes a light emitting sub-unit and a control sub-unit, the light emitting sub-unit includes a light emitting diode and a light controlling thin film transistor, the control sub-unit is used for controlling the light controlling thin film transistor, the light emitting diode includes a plurality of types of light emitting diodes, the light emitting colors of the different types of light emitting diodes are different, the driving apparatus 830 includes: a third voltage acquisition module 831, a third driving voltage module 832.

The third voltage acquisition module 831 is configured to: acquiring forward conduction voltages corresponding to different types of light emitting diodes;

the third driving voltage module 832 is configured to: and obtaining a driving voltage according to the forward conduction voltage, and driving the light-emitting subunit to display by using the driving voltage.

Referring to fig. 15, fig. 15 is a schematic diagram of a first structure of a display device provided in an embodiment of the present application, where a display device 900 includes a display screen 901, a memory 902, and a processor 903, and the display device in the embodiment of the present application includes, but is not limited to, a display device such as a mobile phone, a tablet, and a television.

The display device 900 includes a display screen 901, a memory 902, and a processor 903, it will be understood by those skilled in the art that the display device 900 structure shown in fig. 15 is not limiting of the display device and may include more or less components than illustrated, or may combine some components, or a different arrangement of components.

The display 901 may be used to display information input by a user or information provided to the user, and various graphical user interfaces of the terminal, which may be formed of images, texts, icons, videos, and any combination thereof, and in this embodiment, the display 901 is an OLED display, and the display includes a plurality of light emitting diodes, each of which is connected to a light control thin film transistor.

Memory 902 may be used to store applications and data. The memory 902 stores application programs including executable code. Applications may constitute various functional modules. The processor 903 executes various functional applications and data processing by running application programs stored in the memory 902.

The processor 903 is a control center of the display device 900, connects various parts of the entire display device using various interfaces and lines, and performs various functions of the display device and processes data by running or executing application programs stored in the memory 902 and calling data stored in the memory 902, thereby performing overall monitoring of the display device.

In this embodiment, the processor 903 in the display device 500 loads executable codes corresponding to the processes of one or more application programs into the memory 902 according to the following instructions, and the processor 903 executes the application programs stored in the memory 902, so as to execute:

acquiring the use time of a display screen;

In one embodiment, in obtaining a driving voltage according to an on voltage of the light controlling thin film transistor and driving the light emitting sub-unit display using the driving voltage, the processor 903 performs: acquiring the pixel peak brightness of the current frame image signal of the display screen;

obtaining the forward conduction voltage of the light emitting diode according to the pixel peak brightness and the second characteristic curve;

In one embodiment, the light emitting diodes include a plurality of types of light emitting diodes, the light emitting colors of the different types of light emitting diodes are different, and in obtaining the driving voltage according to the on voltage of the light controlling thin film transistor and driving the light emitting sub-unit display using the driving voltage, the processor 903 performs: acquiring forward conduction voltages corresponding to different types of light emitting diodes;

and obtaining driving voltage according to the starting voltage of the light control thin film transistor and the forward conducting voltage of different light emitting diodes, and driving the light emitting subunit to display by using the driving voltage.

In one embodiment, the light emitting diodes comprise a plurality of types of light emitting diodes, the light emitting colors of the different types of light emitting diodes differ, and the processor 903 performs: obtaining a plurality of second characteristic curves, wherein each second characteristic curve corresponds to one type of light emitting diode;

In one embodiment, in obtaining the driving voltage according to the turn-on voltage of the light controlling thin film transistor and the forward turn-on voltage of the light emitting diode, and driving the light emitting sub-unit display using the driving voltage, the processor 903 performs: obtaining a residual voltage; and adding the starting voltage of the light control thin film transistor, the forward conducting voltage of the light emitting diode and the residual voltage to obtain a driving voltage, and driving the light emitting subunit to display by using the driving voltage.

In this embodiment, the processor 903 of the display device 900 loads executable codes corresponding to the processes of one or more application programs into the memory 902 according to the following instructions, and the processor 903 executes the application programs stored in the memory 902, so as to execute:

In one embodiment, in acquiring the pixel peak luminance of the current frame image signal, the processor 903 performs: acquiring a histogram of a current frame image signal of a display screen;

In one embodiment, the display screen includes different types of light emitting diodes, the different types of light emitting diodes having different light emitting colors, and the processor 903 performs: obtaining a plurality of second characteristic curves, wherein each second characteristic curve corresponds to one type of light emitting diode;

Referring to fig. 16, fig. 16 is a schematic diagram of a second structure of a display device according to an embodiment of the present application, where the display device 900 may further include an AD-DC power supply circuit 904, a DC-DC adjustable power supply circuit 905, a timer 906, an image input interface 907, and an image processing module 908.

The AC-DC power supply circuit 904 is configured to supply power to the entire display device 900, the timer 906 counts the time period of use of the display screen 901, and records the time period in the memory 902, and the processor 903 calculates the turn-on voltage Vgh (th) of the light control thin film transistor TFT Q1 according to a preset first characteristic curve and the time period of use of the display screen 901; the image input interface 907 is used for receiving a display image, the image processing module 908 is used for processing an image signal of a current frame and extracting a histogram of the image signal of the current frame, and the processor 903 is used for obtaining a frame brightness duty ratio, that is, a duty ratio of a high-brightness pixel to a total pixel according to the histogram extracted by the image processing module 908, calculating a pixel peak brightness according to the frame brightness duty ratio, and calculating a forward conducting voltage Vf of the light emitting diode K1 according to a preset second characteristic curve. The processor 903 outputs voltage adjustment information according to the calculated turn-on voltage Vgh (th) of the light control thin film transistor TFT Q1 and the forward turn-on voltage Vf of the light emitting diode K1; the DC-DC adjustable power supply circuit 905 outputs a driving voltage according to the voltage adjustment information to drive the light emitting diode K1 of the display screen to display.

The DC-DC adjustable power supply circuit may be only one type, and may be used to drive all types of leds, and the DC-DC adjustable power supply circuit may be multiple types, and may output different voltages, and may be used to drive different types of leds, for example, may drive red, green, and blue leds, respectively.

The display device provided in the embodiment of the present application and the driving method in the foregoing embodiment belong to the same concept, and any method provided in the driving method embodiment may be run on the display device, and detailed implementation process of the method is shown in the driving method embodiment, which is not repeated herein.

It should be noted that, for the driving method of the embodiment of the present application, it will be understood by those skilled in the art that all or part of the flow of implementing the driving method of the embodiment of the present application may be implemented by controlling related hardware by using a computer program, where the computer program may be stored in a computer readable storage medium, such as a memory, and executed by at least one processor, and the execution may include the flow of the embodiment of the driving method. The storage medium may be a magnetic disk, an optical disk, a Read Only Memory (ROM), a random access Memory (RAM, random Access Memory), or the like.

For the driving device of the embodiment of the present application, each functional module may be integrated in one processing chip, or each module may exist alone physically, or two or more modules may be integrated in one module. The integrated modules may be implemented in hardware or in software functional modules. The integrated modules, if implemented as software functional modules and sold or used as a stand-alone product, may also be stored on a computer readable storage medium such as read-only memory, magnetic or optical disk, etc.

The driving method, the driving device, the storage medium and the display device provided in the embodiments of the present application are described in detail, and specific examples are applied to the description of the principles and the implementation manners of the present application, where the description of the above examples is only used to help understand the method and the core idea of the present application; meanwhile, as those skilled in the art will vary in the specific embodiments and application scope according to the ideas of the present application, the contents of the present specification should not be construed as limiting the present application in summary.

Claims

1. A driving method applied to a display device, the display device including a display screen including a plurality of light emitting pixel units, each of the light emitting pixel units including a light emitting sub-unit and a control sub-unit connected to each other, the light emitting sub-unit including a light emitting diode and a light controlling thin film transistor connected to each other, the control sub-unit for controlling the light controlling thin film transistor, the driving method comprising:

acquiring the use time of the display screen;

2. The driving method according to claim 1, wherein the obtaining a driving voltage according to the turn-on voltage of the light controlling thin film transistor, and driving the light emitting sub-unit display using the driving voltage comprises:

3. The driving method according to claim 1, wherein the light emitting diodes include a plurality of types of light emitting diodes, light emitting colors of the light emitting diodes of different types are different, the obtaining a driving voltage according to an on voltage of the light controlling thin film transistor, and driving the light emitting sub-unit display using the driving voltage includes:

4. The driving method according to claim 2, wherein the light emitting diodes include a plurality of types of light emitting diodes, light emitting colors of the light emitting diodes of different types are different, and the obtaining the forward turn-on voltage of the light emitting diode from the pixel peak luminance and the second characteristic curve includes:

5. The driving method according to any one of claims 2 to 4, wherein obtaining a driving voltage from an on voltage of the light control thin film transistor, a forward on voltage of the light emitting diode, and driving the light emitting sub-unit display using the driving voltage comprises:

obtaining a residual voltage;

6. A driving method applied to a display device, the display device including a display screen including a plurality of light emitting pixel units, each of the light emitting pixel units including a light emitting sub-unit and a control sub-unit connected to each other, the light emitting sub-unit including a light emitting diode and a light controlling thin film transistor connected to each other, the control sub-unit for controlling the light controlling thin film transistor, the driving method comprising:

7. The driving method according to claim 6, wherein the acquiring the pixel peak luminance of the current frame image signal includes:

acquiring a histogram of a current frame image signal of the display screen;

acquiring a frame brightness duty ratio of the current frame image signal according to the histogram of the current frame image signal;

8. The driving method according to claim 6, wherein the light emitting diodes include a plurality of types of light emitting diodes, the light emitting diodes of different types have different emission colors, and the obtaining the forward turn-on voltage of the light emitting diode based on the peak luminance and the second characteristic curve includes:

9. A driving method applied to a display device, wherein the display device includes a display screen, each light emitting pixel unit includes a light emitting sub-unit and a control sub-unit which are connected to each other, the light emitting sub-unit includes a light emitting diode and a light controlling thin film transistor which are connected to each other, the control sub-unit is used for controlling the light controlling thin film transistor, the light emitting diode includes a plurality of types of light emitting diodes, and light emitting colors of the light emitting diodes of different types are different, the method includes:

10. A driving apparatus applied to a display device, the display device comprising a display screen, the display screen comprising a plurality of light emitting pixel units, each light emitting pixel unit comprising a light emitting sub-unit and a control sub-unit connected to each other, the light emitting sub-unit comprising a light emitting diode and a light controlling thin film transistor connected to each other, the control sub-unit being configured to control the light controlling thin film transistor, the driving apparatus comprising:

11. A driving apparatus applied to a display device, the display device comprising a display screen, the display screen comprising a plurality of light emitting pixel units, each light emitting pixel unit comprising a light emitting sub-unit and a control sub-unit connected to each other, the light emitting sub-unit comprising a light emitting diode and a light controlling thin film transistor connected to each other, the control sub-unit being configured to control the light controlling thin film transistor, the driving apparatus comprising:

12. A driving apparatus applied to a display device, wherein the display device includes a display screen, each light emitting pixel unit includes a light emitting sub-unit and a control sub-unit which are connected to each other, the light emitting sub-unit includes a light emitting diode and a light controlling thin film transistor which are connected to each other, the control sub-unit is used for controlling the light controlling thin film transistor, the light emitting diode includes a plurality of types of light emitting diodes, and light emitting colors of the light emitting diodes of different types are different, the driving apparatus includes:

13. A storage medium having stored thereon a computer program, characterized in that the computer program, when executed on a computer, causes the computer to perform the driving method according to any one of claims 1 to 9.

14. A display device comprising a display screen, a memory and a processor, characterized in that the processor is adapted to execute the driving method according to any of claims 1 to 9 by invoking a computer program stored in the memory.