CN110534054B

CN110534054B - Display driving method and device, display device, storage medium and chip

Info

Publication number: CN110534054B
Application number: CN201910700931.5A
Authority: CN
Inventors: 曲爽; 徐刚; 禹秀泳
Original assignee: Huawei Technologies Co Ltd
Current assignee: Huawei Technologies Co Ltd
Priority date: 2019-07-31
Filing date: 2019-07-31
Publication date: 2021-06-22
Anticipated expiration: 2039-07-31
Also published as: CN110534054A

Abstract

The application discloses a display driving method, and belongs to the technical field of display driving. The method is used for displaying the sub-pixels in the display panel according to the target gray scale, wherein the target gray scale of the sub-pixels refers to the gray scale of the sub-pixels when the display panel displays the target image. Specifically, the method determines Q target reference pulse signals from a plurality of reference pulse signals, and provides the Q target reference pulse signals to the sub-pixels so as to drive the sub-pixels to display according to a target gray scale. Wherein the sum of the target values of the Q target reference pulse signals is equal to the target gray scale. In addition, the application also provides a display driving device corresponding to the display driving method, a display device adopting the display driving device, and a storage medium and a chip corresponding to the display driving method.

Description

Display driving method and device, display device, storage medium and chip

Technical Field

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

Background

The display device includes a display panel and a driving integrated circuit. The driving integrated circuit is used for driving the display panel to display. The display panel includes: the liquid crystal display panel comprises a plurality of grid lines, a plurality of data lines and a plurality of sub-pixels, wherein the grid lines and the data lines are intersected to form a plurality of pixel regions, each sub-pixel is positioned in one pixel region, and each sub-pixel comprises: a pixel circuit and a light emitting device. When the display panel displays, it is necessary to provide driving signals to the light emitting devices in the sub-pixels through the pixel circuits, so that the sub-pixels can display different gray scales.

The light emitting device may be driven using a digital driving method. That is, a driving signal including one or more pulse signals may be supplied to the light emitting device to realize the driving of the light emitting device. And when the sub-pixels are driven to display at a certain gray scale, the current values of a plurality of pulse signals supplied to the light emitting devices are the same. When the sub-pixels in the display panel are driven to display according to different gray scales, the duty ratios of the driving signals provided to the light emitting devices in the corresponding sub-pixels are different. For example, according to a target gray scale to be displayed by the sub-pixels, a driving signal with a specified duty ratio may be provided to the corresponding light emitting device to control the light emitting device to display according to the target gray scale. Wherein the specified duty cycle is determined according to the target gray scale.

However, when the display panel is driven by the digital driving method, the application range of the digital driving method is limited because the refresh frequency of the driving signal is high and the requirement for the driving integrated circuit is high.

Disclosure of Invention

The present application provides a display driving method that can solve the problems in the related art. In addition, the application also provides a corresponding display driving device, a storage medium and a chip for executing the display driving method, and a display device comprising the display driving device. The technical scheme provided by the application is as follows:

in a first aspect, the present application provides a display driving method, including: acquiring a target gray scale of a sub-pixel in the display panel, wherein the target gray scale of the sub-pixel is a gray scale corresponding to the sub-pixel when the display panel displays a target image; determining Q target reference pulse signals in the plurality of reference pulse signals based on the target gray scale of the sub-pixels, wherein the sum of target values of the Q target reference pulse signals is equal to the target gray scale, the target value of each target reference pulse signal is the product of the current value of the corresponding target reference pulse signal and the pulse width of the corresponding target reference pulse signal, and Q is a positive integer; the refresh frequency of the reference pulse signals is less than or equal to the rated working frequency of the signal source, and the current values or pulse widths of at least two reference pulse signals in the reference pulse signals are not equal; and supplying Q target reference pulse signals to the sub-pixels, and driving the sub-pixels to display according to the target gray scale.

In the display driving method provided by the embodiment of the present application, Q target reference pulse signals that need to be provided to the sub-pixel are determined in the plurality of reference pulse signals provided by the embodiment of the present application, the refresh frequency of the plurality of reference pulse signals is less than or equal to the rated operating frequency of the signal source, and the current values or pulse widths of at least two reference pulse signals in the plurality of reference pulse signals are not equal.

In order to ensure that the display panel can be driven to carry out full gray scale display according to the reference pulse signal sequence, the reference gray scale range of the plurality of reference pulse signals covers the rated gray scale range of the sub-pixels. Wherein, the rated gray scale range is the gray scale range supported by the sub-pixels, and the reference gray scale range comprises: and all positive integers which are greater than or equal to the minimum value of the target values corresponding to the plurality of reference pulse signals respectively and less than or equal to the sum of the target values corresponding to the plurality of reference pulse signals respectively.

In a first implementation of the multiple reference pulse signals, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]And the plurality of reference pulse signals comprise n reference pulse signals, the pulse widths of the n reference pulse signals are the same, but the current values of the n reference pulse signals are different, wherein the current value of each reference pulse signal is 2 exponential function current units, and n is an integer greater than or equal to 2.

In a second implementation of multiple reference pulse signals, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals includes: (10^m-1) reference pulse signals having a current value of 1 current unit,

current value of 10^mA plurality of reference pulse signals of current unit, wherein the pulse width of the reference pulse signals is the same, m is a positive integer,

is a pair of

The value of n satisfies the following conditions:

is a positive integer.

In a third implementation of multiple reference pulse signals, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals includes:(2ⁿ¹¹-1) reference pulse signals with current value of 1 current unit, n12 current values of 2ⁿ¹¹Reference pulse signal of current unit, and n13 current values are 2ⁿ¹¹X (n12+1) reference pulse signals of current units, and pulse widths of the plurality of reference pulse signals are the same, n11 and n12 are both positive integers, n13 is an integer greater than or equal to 0, and n, n11, n12, and n13 satisfy: (n13+ 1). times.2ⁿ¹¹×(n12+1)＝2ⁿ。

In a fourth implementation of the multiple reference pulse signals, when the rated gray scale range of the sub-pixels is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals includes: (n21+1) reference pulse signals with current value of 1 current unit, and (n22+1) reference pulse signals with current value of 1 current unit

A reference pulse signal of current unit, n23 current values

The pulse width of the ith reference pulse signal in the (n21+1) reference pulse signals is 2^i-1The pulse width of the jth reference pulse signal in the (n22+1) reference pulse signals is 2^j-1And the pulse width of the kth reference pulse signal in the n23 reference pulse signals is 2^k-1。

Wherein n21, n22 and n23 are each an integer greater than or equal to 0, i, j and k are each a positive integer, and when n23 is a positive integer, n21, n22 and n23 satisfy:

when n23 is equal to 0, n21, and n22 satisfy:

it should be noted that, the total number of the Q target reference pulse signals provided to the sub-pixels may be different corresponding to different gray scales of the sub-pixels, and/or the current values of the Q target reference pulse signals may be different, at this time, the change of the driving signal for driving the sub-pixels to display according to different gray scales may be represented as the change of the refresh times, refresh current and refresh pulse width of the reference pulse signals in the reference pulse signal sequence provided to the sub-pixels. In the above four implementations of the reference pulse signal sequence, the first to third implementations are equivalent to introducing a change in the number of times of refresh and a change in the refresh current, and the fourth implementation is equivalent to introducing a change in the number of times of refresh, a change in the refresh current, and a change in the refresh pulse width. The number of times of refreshing is represented by the total number of Q target reference pulse signals, the refreshing current is represented by the current of each target reference pulse signal, and the refreshing pulse width is represented by the duration of each target reference pulse signal lasting to an active level.

When the refresh current and the refresh times are introduced into the reference pulse signal sequence, the refresh frequency can be effectively reduced. When the refresh pulse width is further introduced, the number of charging and discharging times of the light-emitting device in the driving process can be reduced, the waste of charging time caused by the number of charging and discharging times can be reduced, and the driving efficiency is improved.

Optionally, the sub-pixel includes a pixel circuit and a light emitting circuit that are connected to each other, and an implementation process of providing Q target reference pulse signals to the sub-pixel specifically includes: and controlling the pixel circuit to be in a conducting state during a period of supplying any one of the target reference pulse signals to the light emitting circuit so as to supply any one of the target reference pulse signals to the light emitting circuit.

Correspondingly, the method further comprises the following steps: and controlling the pixel circuit to be in a closed state in a period of supplying other pulse signals to the light-emitting circuit so as to stop supplying the other pulse signals to the light-emitting circuit, wherein the other pulse signals are any one of the reference pulse signals except the Q target reference pulse signals.

In a second aspect, the present application provides a display driving method comprising: when the gray scale of the sub-pixel is a target gray scale, determining a target gray scale interval in which the target gray scale is located, wherein the rated gray scale range of the sub-pixel comprises a plurality of gray scale intervals which are sequentially arranged, each gray scale interval corresponds to a determined current value or a determined current value interval, the target gray scale interval is one of the gray scale intervals, and the rated gray scale range is a gray scale range supported by the sub-pixel; determining values of O in the O reference pulse signals and current values of the O reference pulse signals based on a current value or a current value interval corresponding to the target gray scale interval and the target gray scale, wherein O is a positive integer; the current values of the O reference pulse signals are equal, the pulse widths of the O reference pulse signals are equal, and the current values of the O reference pulse signals are the current values corresponding to the target gray scale interval under the condition that the target gray scale interval corresponds to the current values; under the condition that the target gray scale interval corresponds to the current value interval, the current values of the O reference pulse signals are the current values corresponding to the target gray scale in the current value interval; the value of O is determined according to the current values of the O reference pulse signals, the pulse widths of the O reference pulse signals and the target gray scale; and providing the O reference pulse signals to the sub-pixels according to the value of the O and the current values of the O reference pulse signals, and driving the sub-pixels to display according to the target gray scale.

According to the display driving method provided by the embodiment of the application, by setting different current corresponding conditions of a gray scale interval and a current value or a current value interval and different value change conditions of the value of O along with the gray scale interval, the value of O in O reference pulse signals and the current value of the O reference pulse signals can be respectively determined according to the current corresponding condition and the value change condition of a target gray scale interval in which a target gray scale is located.

In one implementation, the value of O varies linearly with the gray level in the target gray level interval.

At this time, if the pulse widths of the O reference pulse signals are equal, and the pulse widths of the reference pulse signals for driving the sub-pixels to display the corresponding gray scales are also equal for different gray scales, the value of O satisfies: o/(ixs), where I is the current value of the O reference pulse signals, S is the pulse width of the O reference pulse signals, and G is the target gray scale.

In another implementation, the relationship that the value of O changes with the gray level in the target gray level interval satisfies the function relationship of the increasing function which is convex downward. In this implementation, in order to ensure the display effect of the display panel, the gamma value of the image of the display panel needs to be adjusted.

In a third aspect, the present application provides a display driving apparatus comprising: the acquisition module is used for acquiring a target gray scale of a sub-pixel in the display panel, wherein the target gray scale of the sub-pixel is a gray scale corresponding to the sub-pixel when the display panel displays a target image; the determining module is used for determining Q target reference pulse signals in the multiple reference pulse signals based on the target gray scale of the sub-pixels, the sum of target values of the Q target reference pulse signals is equal to the target gray scale, the target value of each target reference pulse signal is the product of the current value of the corresponding target reference pulse signal and the pulse width of the corresponding target reference pulse signal, and Q is a positive integer; the refresh frequency of the reference pulse signals is less than or equal to the rated working frequency of the signal source, and the current values or pulse widths of at least two reference pulse signals in the reference pulse signals are not equal; and the driving module is used for providing Q target reference pulse signals for the sub-pixels and driving the sub-pixels to display according to the target gray scale.

Optionally, the reference gray scale range of the plurality of reference pulse signals covers the rated gray scale range of the sub-pixels; wherein, the rated gray scale range is the gray scale range supported by the sub-pixels, and the reference gray scale range comprises: and all positive integers which are greater than or equal to the minimum value of the target values corresponding to the plurality of reference pulse signals respectively and less than or equal to the sum of the target values corresponding to the plurality of reference pulse signals respectively.

Optionally, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]And the plurality of reference pulse signals comprise n reference pulse signals, the pulse widths of the n reference pulse signals are the same, but the current values of the n reference pulse signals are different, wherein the current value of each reference pulse signal is 2 exponential function current units, and n is an integer greater than or equal to 2.

Optionally, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals includes: (10^m-1) reference pulse signals having a current value of 1 current unit,

is a pair of

The value of n satisfies the following conditions:

is a positive integer.

Optionally, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals includes: (2ⁿ¹¹-1) reference pulse signals with current value of 1 current unit, n12 current values of 2ⁿ¹¹Reference pulse signal of current unit, and n13 current values are 2ⁿ¹¹X (n12+1) reference pulse signals of current units, and pulse widths of the plurality of reference pulse signals are the same, n11 and n12 are both positive integers, n13 is an integer greater than or equal to 0, and n, n11, n12, and n13 satisfy: (n13+ 1). times.2ⁿ¹¹×(n12+1)＝2ⁿ。

Optionally, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals includes: (n21+1) reference pulse signals with current value of 1 current unit, and (n22+1) reference pulse signals with current value of 1 current unit

A reference pulse signal of current unit, n23 current values

Reference pulse of one current unitPulse width of ith reference pulse signal in (n21+1) reference pulse signals is 2^i-1The pulse width of the jth reference pulse signal in the (n22+1) reference pulse signals is 2^j-1The pulse width of the kth reference pulse signal in the (n23+1) reference pulse signals is 2^k-1。

when n23 is equal to 0, n21, and n22 satisfy:

optionally, the sub-pixel comprises: pixel circuit and luminescent circuit, the drive module of interconnect specifically is used for: and controlling the pixel circuit to be in a conducting state during a period of supplying any one of the target reference pulse signals to the light emitting circuit so as to supply any one of the target reference pulse signals to the light emitting circuit.

Optionally, the driving module is further configured to: and controlling the pixel circuit to be in a closed state in a period of supplying other pulse signals to the light-emitting circuit so as to stop supplying the other pulse signals to the light-emitting circuit, wherein the other pulse signals are any one of the reference pulse signals except the Q target reference pulse signals.

In a fourth aspect, the present application provides a display driving apparatus comprising: the first determining module is used for determining a target gray scale interval where a target gray scale is located when the gray scale of the sub-pixel is the target gray scale, wherein the rated gray scale range of the sub-pixel comprises a plurality of gray scale intervals which are sequentially arranged, each gray scale interval corresponds to a determined current value or a determined current value interval, the target gray scale interval is one of the gray scale intervals, and the rated gray scale range is the gray scale range supported by the sub-pixel; the second determining module is used for determining values of O in the O reference pulse signals and current values of the O reference pulse signals based on a current value or a current value interval corresponding to the target gray scale interval and the target gray scale, wherein O is a positive integer; the current values of the O reference pulse signals are equal, the pulse widths of the O reference pulse signals are equal, and the current values of the O reference pulse signals are the current values corresponding to the target gray scale interval under the condition that the target gray scale interval corresponds to the current values; under the condition that the target gray scale interval corresponds to the current value interval, the current values of the O reference pulse signals are the current values corresponding to the target gray scale in the current value interval; the value of O is determined according to the current values of the O reference pulse signals, the pulse widths of the O reference pulse signals and the target gray scale; and the driving module is used for providing the O reference pulse signals for the sub-pixels according to the value of the O and the current values of the O reference pulse signals, and driving the sub-pixels to display according to the target gray scale.

In a fifth aspect, the present application provides a display device comprising: and a display driving device for driving the sub-pixels of the display panel to display according to the corresponding gray scale when the display panel displays the target image, wherein the display driving device is the display driving device according to any one of the third aspect or the fourth aspect.

In one implementation, the display panel includes a plurality of sub-pixels, and the plurality of sub-pixels are respectively provided with driving signals by a plurality of driving signal sources.

In a sixth aspect, the present application provides a display driving apparatus comprising a processor, a memory, and a driving integrated circuit;

when the processor executes the computer program stored in the memory, the driving integrated circuit executes the display driving method according to any one of the first aspect, or executes the display driving method according to any one of the second aspect.

In a seventh aspect, the present application provides a storage medium, wherein when executed by a processor, instructions of the storage medium implement the display driving method according to any one of the first aspect, or implement the display driving method according to any one of the second aspect.

In an eighth aspect, the present application provides a chip, where the chip includes a programmable logic circuit and/or a program instruction, and when the chip runs, the chip is configured to implement the display driving method according to any one of the first aspect, or the display driving method according to any one of the second aspect.

Drawings

Fig. 1 is a schematic structural diagram of a display panel according to an embodiment of the present disclosure;

fig. 2 is a schematic diagram of a display device provided with two driving ics according to an embodiment of the present disclosure;

fig. 3 is a schematic structural diagram of a pixel circuit and a light emitting device in a sub-pixel provided in an embodiment of the present application;

fig. 4 is a schematic structural diagram of a pixel circuit and a light emitting device in another sub-pixel provided in the present application;

fig. 5 is a schematic structural diagram of a driving integrated circuit according to an embodiment of the present disclosure;

fig. 6 is a flowchart of a display driving method according to an embodiment of the present application;

fig. 7 is a schematic waveform diagram of a reference pulse signal sequence according to an embodiment of the present application;

fig. 8 is a schematic waveform diagram of a reference pulse signal sequence according to an embodiment of the present application;

fig. 9 is a schematic waveform diagram of a reference pulse signal sequence according to an embodiment of the present application;

fig. 10 is a schematic waveform diagram of a reference pulse signal sequence according to an embodiment of the present application;

fig. 11 is a flowchart of another display driving method provided in the embodiment of the present application;

FIG. 12 is a schematic diagram illustrating a sub-pixel with a nominal gray scale range including three gray scale sections arranged in sequence according to an embodiment of the present disclosure;

FIG. 13 is a schematic diagram illustrating a sub-pixel with a nominal gray scale range including three gray scale sections arranged in sequence according to an embodiment of the present disclosure;

FIG. 14 is a schematic diagram illustrating a sub-pixel with a nominal gray scale range including three gray scale sections arranged in sequence according to an embodiment of the present disclosure;

fig. 15 is a schematic structural diagram of a display driving apparatus according to an embodiment of the present application;

fig. 16 is a schematic structural diagram of another display driving apparatus provided in the embodiment of the present application;

fig. 17 is a schematic structural diagram of another display driving apparatus according to an embodiment of the present application.

Detailed Description

To make the objects, technical solutions and advantages of the present application more clear, embodiments of the present application will be described in further detail below with reference to the accompanying drawings.

There are various types of display panels, such as a liquid crystal display panel (also called an LCD display panel), an Organic Light Emitting Diode (OLED) display panel, a Micro light emitting diode (Micro LED) display panel, and a Quantum Dot light emitting diode (QLED) display panel. Among them, the OLED display panel is typically represented by an Active-matrix organic light emitting diode (AMOLED) display panel. Table 1 is a table comparing characteristics of the LCD display panel, the AMOLED display panel, the QLED display panel, and the Micro LED display panel.

TABLE 1

From this table 1 it can be seen that: LCD display panel can't realize the flexible display, and because LCD display panel uses the light filter to realize color control, leads to LCD display panel to have luminous efficiency and the equal not good problem of color saturation. The AMOLED display panel has the characteristics of self-luminous property and flexible display, but the AMOLED display panel has great bottlenecks in light-emitting efficiency, brightness and service life, and is high in cost. The Micro LED display panel has great advantages in terms of luminous efficiency, response speed and lifetime, and is considered as an inevitable development trend of display technology. Therefore, it is a necessary trend to research a display driving method of the Micro LED display panel.

Before explaining the display driving method of the display panel, terms appearing in the following part of the present application will be explained here.

1. The gray scale is to divide the brightness change between the brightest and darkest into a plurality of parts so as to control the brightness of the display panel corresponding to the signal input. Each image is composed of a plurality of dots, which are also called image pixels (pixels), which are represented by pixel units in the display panel, and each pixel unit can generally represent a plurality of different colors. Wherein each pixel unit may include: red (R), green (G), and blue (B) sub-pixels. A light source is arranged behind each sub-pixel, the light source behind each sub-pixel can show different brightness levels, and the gray scale represents the gradation level of different brightness from the darkest to the brightest. The more the intermediate levels are, the more exquisite the picture effect can be presented. Taking a display panel using 8 bits (bit) to represent the driving signal as an example, the display panel can represent 2 to 8 power (i.e. 256) luminance levels, and at this time, the 256 luminance levels can be referred to as 256 gray levels. For each pixel unit on the display panel, the color of the pixel unit is obtained by mixing light emitted by the RGB sub-pixels in the pixel unit. Accordingly, the color change of each pixel unit on the display panel is actually caused by the gray scale change of the three RGB sub-pixels in the pixel unit.

2. The sub-pixel, two adjacent pixel units have a distance of 5.2 microns, and can be regarded as being connected together macroscopically. However, microscopically, each pixel cell also includes smaller structures, which are referred to as "subpixels".

The currently adopted display driving method mainly comprises the following steps: an analog driving method and a digital driving method.

The analog driving method is a driving method generally adopted by the AMOLED display panel at present. In the analog driving method, the driving current of the driving signal supplied to the sub-pixel is different for different display gray scales of the sub-pixel. The gate voltage of the driving transistor can be adjusted by adjusting the potential of the driving signal, so that the driving current output to the light-emitting device by the driving transistor can be adjusted. Because the Micro LED display panel is formed by integrating a high-density LED array on a chip, the light-emitting wavelength of the Micro LED display panel changes in a nonlinear manner along with the change of the driving current under the dual actions of the polarization effect and the thermal effect of the LED. In the analog driving method, the luminance of the sub-pixels and the driving current should be in a direct proportion relationship, and if the Micro LED display panel is driven by the analog driving method, the problem of color cast occurs, and color compensation is required. However, the compensation method is complex and difficult to realize. For example, when the display panel can realize 1024 gray-scale displays, 1024 compensation logics are needed for color compensation, which results in a difficult color compensation. Therefore, the analog driving method is difficult to be applied to Micro LED display panels.

The digital driving method is a driving method adopted by the existing outdoor display screen. In the digital driving method, driving of the light emitting device may be achieved by supplying a driving signal including one or more pulse signals to the light emitting device. And the current values of the pulse signals supplied to the light emitting devices are the same. When the sub-pixels are driven to display according to different gray scales, duty ratios of driving signals supplied to the light emitting devices are different. That is, the display panel may be driven by a Pulse Width Modulation (PWM) technique. Hardware which may be used in the driving method is mainly a Thin Film Transistor (TFT) and a Micro Integrated Circuit (uIC), and uIC is a display driving Circuit made of a device such as a CMOS. However, uIC has not yet matured, its development time is unknown, and its power consumption is large. Although the technology is mature, the TFT can not work at high frequency, and can only work normally when the refresh frequency is less than 15 Megahertz (MHZ). However, the refresh frequency of the digital driving method is generally high, for example, when the total number of sub-pixels in the display panel to which the driving signal is supplied by one data line is 1920, the total number of times of refreshing the display panel in a unit time is 60, and the number of times of refreshing the pulse signal in each driving process is 1024, the refresh frequency of the display panel is 60 × 1920 — 118MHz, and since the refresh frequency is greater than the frequency at which the TFT can normally operate, the driving using the TFT cannot be realized. Therefore, no suitable driving hardware is currently available for the digital driving method.

The refresh frequency of the display panel refers to the frequency of the display panel refresh driving signals, where the refresh frequency f is a × b × c, where a is the total number of times that the display panel refreshes a image in a unit time, b is the total number of sub-pixels to which the driving signals are supplied from the same data line, and c is the number of times that the pulse signals are refreshed in each driving process, that is, c is the total number of pulse signals included in the driving signals supplied to the light emitting devices in the sub-pixels when one sub-pixel is driven to perform display. Correspondingly, the refresh number of the pulse signal in each driving process is 1024, which means that: when one sub-pixel is driven to display, the driving signal supplied to the light emitting device in the sub-pixel includes 1024 pulse signals.

The embodiment of the application provides a display driving method, which can solve the problems and drive Micro LED display panels and other types of display panels. For ease of understanding, the structures of the display device and the display panel will be described first.

Alternatively, the display device may be: the display device comprises a watch, a liquid crystal panel, electronic paper, a mobile phone, a tablet personal computer, a television, a display, a notebook computer, a digital photo frame, a navigator and other products or components with display functions. For example, the display device may be a mobile terminal equipped with a Micro LED display panel, a smart watch, and the like.

The display device includes a display panel and a driving integrated circuit. As shown in fig. 1, the display panel includes: the pixel structure comprises a plurality of grid lines G, a plurality of data lines D and a plurality of sub-pixels X, wherein the data lines D and the grid lines G are intersected to form a plurality of pixel regions, and each sub-pixel X is positioned in one pixel region. Each sub-pixel X includes: a pixel circuit 1 and a light emitting circuit 2. The light emitting circuit includes a light emitting device. When the display panel is a Micro LED display panel, the light emitting device is an LED. The pixel circuit is used for controlling the light-emitting circuit to emit light according to the driving signal provided by the driving integrated circuit. The driving integrated circuit may include a gate driving circuit for providing a gate signal to the pixel circuit, and a source driving circuit for transmitting the gate signal to the pixel circuit through the gate line. The source driver circuit is used to supply a driving signal (also referred to as a data signal) to the pixel circuit, and the data signal is transmitted to the pixel circuit through the data line. The gate signal is used to control the on state of the pixel circuit, and when the pixel circuit is in the on state, a data signal can be transmitted to the light emitting circuit through the pixel circuit. The data signal is used for charging the light-emitting circuit so as to enable the light-emitting circuit to emit light.

Further, the plurality of sub-pixels may be supplied with driving signals by a plurality of driving integrated circuits, respectively. For example, as shown in fig. 2, two driving integrated circuits may be disposed in the display device, the driving integrated circuit 11 is disposed on the top of the display panel 0, and the driving integrated circuit 12 is disposed on the bottom of the display panel 0, each driving integrated circuit is respectively used for driving the sub-pixels in the half display panel. Because the driving signal can be attenuated in the process of being transmitted to the sub-pixels by the driving integrated circuit, and the attenuation degree of the driving signal is positively correlated with the transmission distance of the driving signal, the uniformity of the distance from the sub-pixels to the driving integrated circuit for providing the driving signal for the corresponding sub-pixels in the display panel can be improved by arranging the plurality of driving integrated circuits in the display panel, so that the attenuation degree difference of the driving signal received by the sub-pixels caused by the distance is reduced as much as possible, and the display effect of the display panel is further improved.

Fig. 3 is a schematic structural diagram of a pixel circuit and a light emitting circuit in a sub-pixel according to an embodiment of the present disclosure. As shown in fig. 3, the pixel circuit includes: a switching transistor M1, a driving transistor M2, and a first storage capacitor C1. The lighting circuit includes an LED. The gate of the switching transistor M1 is connected to the gate line G, the first electrode of the switching transistor M1 is connected to the power source terminal VDD, and the second electrode of the switching transistor M1 is connected to the gate of the driving transistor M2. A first pole of the driving transistor M2 is connected to the data line D, and a second pole of the driving transistor M2 is connected to one end of the LED. The other end of the LED is connected to electrode VSS. The first storage capacitor C1 has one end connected to the gate of the driving transistor M2 and the other end connected to the data line D, and the first storage capacitor C1 is used to maintain the light emission stability of the LED.

FIG. 4 shows an embodiment of the present application

And providing another structural schematic diagram of the pixel circuit and the light-emitting circuit in the sub-pixel. As shown in fig. 4, the pixel circuit includes: switching transistors T1 to T6, a driving transistor T7, and a second storage capacitor C2. The lighting circuit includes an LED. The gate of the switching transistor T1 is connected to the (N-1) th gate line G (N-1), the first electrode of the switching transistor T1 is connected to the first power source terminal Vin, and the second electrode of the switching transistor T1 is connected to one end of the second storage capacitor C2. The gate of the switching transistor T2 is connected to the nth gate line g (N), the first pole of the switching transistor T2 is connected to the data line D, and the second pole of the switching transistor T2 is connected to the first pole of the switching transistor T4. In the scanning process of the display panel, the gate driving circuit sequentially provides driving signals at an effective level to the (N-1) th gate line G (N-1) and the Nth gate line G (N), and the (N-1) th gate line G (N-1) and the Nth gate line G (N) are respectively connected with pixel circuits in different sub-pixels. The gate of the switching transistor T3 is connected to the nth gate line g (N), the first pole of the switching transistor T3 is connected to the gate of the switching transistor T4, and the second pole of the switching transistor T3 is connected to the second pole of the switching transistor T4. The gate of the switching transistor T5 is connected to the light emission enable signal terminal EM, the first electrode of the switching transistor T5 is connected to the second power source terminal VDD, and the second electrode of the switching transistor T5 is connected to the first electrode of the switching transistor T4. The gate of the switching transistor T6 is connected to the (N-1) th gate line G (N-1), the first electrode of the switching transistor T6 is connected to the first power source terminal Vin, and the second electrode of the switching transistor T6 is connected to one end of the LED. The gate of the driving transistor T7 is connected to the light emission enable signal terminal EM, the first pole of the driving transistor T7 is connected to the second pole of the switching transistor T4, and the second pole of the driving transistor T7 is connected to one end of the LED. The other end of the LED is connected to electrode VSS. The other end of the second storage capacitor C2 is connected to the second power terminal VDD, and the second storage capacitor C2 serves to maintain the light emission stability of the LED. The light-emitting start signal provided by the light-emitting start signal terminal EM is used for controlling whether to provide a driving current for the LED.

As shown in fig. 3 and 4, the driving transistors are used for providing a driving current to the LEDs, so that the LEDs emit light under the driving of the driving current, thereby realizing image display of the display panel. In the image circuit shown in fig. 3, the driving current supplied to the LED by the driving transistor M2 is obtained based on the data signal supplied from the data line D. In the pixel circuit shown in fig. 4, when the gate driving circuit supplies the driving signal at the active level to the nth gate line g (N), on the one hand, the switching transistor T2 and the switching transistor T4 may be controlled to be turned on so that the data signal from the data line D may be supplied to the first pole of the driving transistor T7 through the switching transistor T2 and the switching transistor T4; on the other hand, the switching transistor T3 may be controlled to be turned on so that the signal from the first pole of the switching transistor T3 may be supplied to the first pole of the driving transistor T7 through the switching transistor T3. Therefore, the driving current supplied by the driving transistor T7 to the LED can be obtained based on the data signal and the signal from the first pole of the switching transistor T3, and compared with the pixel circuit shown in fig. 3, the pixel circuit shown in fig. 4 can compensate the leakage current of the transistor in the pixel circuit by using the signal from the first pole of the switching transistor T3, reduce the influence of the leakage current on the light emitting brightness of the LED, and ensure the image display effect of the display panel.

When the driving signal is characterized by a pulse signal, as shown in fig. 5, the driving integrated circuit 11 may include: a brightness and gray scale control sub-circuit 111, a PWM generation sub-circuit 112, and a current control sub-circuit 113. The luminance and grayscale control sub-circuit 111 is used to: the method comprises the steps of obtaining a target gray scale to be displayed by a sub-pixel in the display panel, determining one or more pulse signals required to be provided for the sub-pixel based on the target gray scale, and respectively sending information of the one or more pulse signals to the PWM generating sub-circuit 112 and the current control sub-circuit 113.

The PWM generation sub-circuit 112 is configured to determine a time period in which the pulse signal needs to be provided to the sub-pixel and a time period in which the pulse signal does not need to be provided to the sub-pixel according to the information of the one or more pulse signals, and generate a corresponding pulse control signal according to the determined time periods. The pulse control signal is at an active level during a period of time in which it is necessary to supply a pulse signal to the sub-pixel, and the pulse control signal at the active level is used to control the pixel circuit (i.e., the switch S in fig. 5) to be in a conductive state. The pulse control signal is at an inactive level for a period of time during which it is not necessary to supply a pulse signal to the sub-pixel, the pulse control signal at the inactive level being used to control the switch S to be in an off state. When the switch S is in the on state, a signal path exists between the current control sub-circuit 113 and the light-emitting circuit 2, the current control sub-circuit 113 can input a signal to the light-emitting circuit 2, and when the switch S is in the off state, a signal path does not exist between the current control sub-circuit 113 and the light-emitting circuit 2, and the current control sub-circuit 113 cannot input a signal to the light-emitting circuit 2.

The current control sub-circuit 113 is configured to generate the one or more pulse signals according to the information of the one or more pulse signals, and the timing of the one or more pulse signals corresponds to the timing of the pulse control signal, so that the one or more pulse signals can be input to the light emitting circuit 2 when the switch S is in the on state.

The following describes a driving principle of the display driving method provided in the embodiment of the present application. As shown in fig. 6, the method comprises the steps of:

step 601, obtaining a target gray scale of a sub-pixel in the display panel.

The target image to be displayed by the display panel comprises a plurality of image pixel points, and the color of the image pixel points is presented through the gray scale displayed by the sub-pixels at the corresponding positions in the display panel, so that the target gray scale to be displayed by the sub-pixels can be determined according to the target image to be displayed by the display panel, the positions of the sub-pixels in the display panel and the corresponding relation between the sub-pixels and the image pixel points. The target gray scale of the sub-pixel is the gray scale corresponding to the sub-pixel when the display panel displays the target image.

Step 602, determining Q target reference pulse signals among the plurality of reference pulse signals based on the target gray scale of the sub-pixel, wherein Q is a positive integer.

In order to ensure that the sub-pixels can display according to the target gray scale, it is necessary to ensure that the sum of the target values of the Q target reference pulse signals is equal to the target gray scale. The target value of each target reference pulse signal is the product of the current value of the corresponding target reference pulse signal and the pulse width of the corresponding target reference pulse signal.

It should be noted that, for convenience of illustration, in the embodiment of the present application, the plurality of reference pulse signals may be referred to as a reference pulse signal sequence, and the driving signal input to the light emitting circuit is referred to as a target reference pulse signal.

The reference pulse signal sequence may be provided by a signal source. At this time, in order to ensure that the display panel can be driven by the signal source, the refresh frequency of the display panel should be less than or equal to the rated operating frequency of the signal source. And, if the circuit composed of the TFT is used to control the light emitting circuit, the refresh frequency should be less than the maximum operating frequency of the TFT (e.g. 15 MHZ). The refresh frequency is the product of the total number of the plurality of reference pulse signals in the reference pulse signal sequence, the total number of times of refreshing the display panel in a unit time, and the total number of sub-pixels of the reference pulse signal sequence provided by the same data line.

To this end, the embodiments of the present application provide a reference pulse signal sequence, and the refresh frequency of the reference pulse signal sequence is less than or equal to the rated operating frequency of the signal source. And, the reference pulse signal sequence includes a plurality of reference pulse signals satisfying at least one of the following two conditions: the current values of at least two of the plurality of reference pulse signals are not equal, and the pulse widths of at least two of the plurality of reference pulse signals are not equal.

In addition, in order to ensure that the display panel can be driven to carry out full gray scale display according to the reference pulse signal sequence, the reference gray scale range of the reference pulse signal sequence can cover the rated gray scale range of the sub-pixels. The rated gray scale range is a gray scale range supported by the sub-pixels, that is, the sub-pixels can display any gray scale within the rated gray scale range. The reference gray scale range includes: and all positive integers which are greater than or equal to the minimum value of the target values corresponding to the plurality of reference pulse signals respectively and less than or equal to the sum of the target values corresponding to the plurality of reference pulse signals respectively.

Also, the nominal gray scale range of the sub-pixels may be determined according to the number of bits of the driving signal supplied to the sub-pixels. And the nominal gray scale range of all the sub-pixels in the display panel is generally the same. Alternatively, when the number of bits of the driving signal supplied to the sub-pixel is n, the maximum value of the rated gray scale range of the sub-pixel may be 2ⁿ-1, i.e. the nominal gray scale range of the sub-pixel is [0,2 ]ⁿ-1]. It should be noted that, since the gray scale of a sub-pixel is an integer, the "rated gray scale range of a sub-pixel" defined herein is [0,2 ]ⁿ-1]", actually means that the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]The set of all integers in (1).

Optionally, there may be multiple implementation manners of the reference pulse signal sequence, and the following four implementation manners are taken as examples in the embodiment of the present application to describe the reference pulse signal sequence:

in a first implementation, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]The reference pulse signal sequence may include: n reference pulse signals, the n reference pulsesThe pulse width of the reference pulse signal is the same but the current is different, and the current value of each reference pulse signal is 2 current units of exponential function. Wherein n is an integer greater than or equal to 2. For example, assuming that one current unit is 1 microampere (uA), when n is 10, the rated gray scale range of the sub-pixel is [0,1023]]Referring to the waveform diagram of the reference pulse signal sequence shown in fig. 7, the reference pulse signal sequence may include: 10 reference pulse signals with the same pulse width, wherein the current values of the 10 reference pulse signals are respectively as follows: 1uA, 2uA, 4uA, 8uA, 16uA, 32uA, 64uA, 128uA, 256uA and 512 uA.

It should be noted that in this implementation, the value of n should ensure that the refresh frequency of the reference pulse signal sequence is less than the maximum operating frequency of the TFT. In this implementation example, the total number n of reference pulse signals in the reference pulse signal sequence is 10, when the total number of times that the display panel refreshes a picture in a unit time is 60, that is, the refresh frequency of the display panel is 60Hz, and the total number 1920 of sub-pixels of the reference pulse signal sequence is provided by the same signal line, the refresh frequency of the reference pulse signal sequence is 60 × 1920 × 10 is 1.152MHz, which is less than the maximum operating frequency of the TFT, and thus, the reference pulse signal sequence in this implementation example can realize driving using the TFT.

And, since the maximum current value of the reference pulse signal is 2^n-1To ensure effective driving of the sub-pixels, the signal-to-noise ratio of the reference pulse signal is required to be greater than 2^n-1Decibel (dB). In this implementation example, the maximum current value of the reference pulse signal is 512uA, and therefore, it is necessary to ensure that the signal-to-noise ratio of the reference pulse signal is greater than 512 dB. Meanwhile, in the implementation mode, even if the compensation needs to be performed on the display panel, since the total number of the reference pulse signal current values in the reference pulse signal sequence is 10, the compensation only needs to be performed according to 10 compensation logics, and the complexity of the compensation is simplified.

In a second implementation, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]The reference pulse signal sequence comprises (10)^m-1) reference pulses with a current value of 1 current unitImpulse signal sum

Current value of 10^mThe pulse width of the reference pulse signal in each current unit is the same. Wherein m is a positive integer,

is a pair of

And the value of n satisfies: the

Is a positive integer.

For example, assuming that a current unit is 1uA, when n is 10, the rated gray scale range of the sub-pixel is [0,1023], and if m is 2, please refer to the waveform diagram of the reference pulse signal sequence shown in fig. 8, which may include: 99 reference pulse signals with the current value of 1uA and 10 reference pulse signals with the current value of 100uA, wherein the pulse widths of the 99 reference pulse signals with the current value of 1uA and the 10 reference pulse signals with the current value of 100uA are the same.

It should be noted that in this implementation, the value of n should also ensure that the refresh frequency of the reference pulse signal sequence is less than the maximum operating frequency of the TFT. In this implementation example, the total number n of reference pulse signals in the reference pulse signal sequence is 109, when the total number of times that the display panel refreshes a picture in a unit time is 60, that is, the refresh frequency of the display panel is 60Hz, and the total number 1920 of sub-pixels of the reference pulse signal sequence is provided by the same signal line, the refresh frequency of the reference pulse signal sequence is 60 × 1920 × 109 is 12.56MHz, which is less than the maximum operating frequency of the TFT, and thus, the reference pulse signal sequence in this implementation example can realize driving using the TFT.

Moreover, in order to ensure effective driving of the sub-pixels, it is necessary to ensure that the signal-to-noise ratio of the reference pulse signal is greater than the maximum current value of the reference pulse signal in the reference pulse signal sequence. In this implementation example, the maximum current value of the reference pulse signal is 100uA, and therefore, it is necessary to ensure that the signal-to-noise ratio of the reference pulse signal is greater than 100 dB. Meanwhile, in the implementation mode, even if the compensation needs to be performed on the display panel, since the total number of the current values in the reference pulse signal sequence is 2, the compensation only needs to be performed according to 2 compensation logics, and the complexity of the compensation is simplified.

In a third implementation, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]The reference pulse signal sequence includes: (2ⁿ¹¹-1) reference pulse signals with current value of 1 current unit, n12 current values of 2ⁿ¹¹Reference pulse signal of current unit, and n13 current values are 2ⁿ¹¹X (n12+1) current units, and the pulse widths of the plurality of reference pulse signals in the reference pulse signal sequence are the same. Wherein n11 and n12 are both positive integers, n13 is an integer greater than or equal to 0, and n, n11, n12 and n13 satisfy: (n13+ 1). times.2ⁿ¹¹×(n12+1)＝2ⁿI.e. n is an integer greater than or equal to 2.

For example, assuming that a current unit is 1uA, when n is 10, the rated gray scale range of the sub-pixel is [0,1023], and if n11 is 3, n12 is 7, and n13 is 15, please refer to the waveform diagram of the reference pulse signal sequence shown in fig. 9, which may include: the pulse width of the reference pulse signals in the reference pulse signal sequence is the same, and the pulse width of the reference pulse signals in the reference pulse signal sequence is 7 reference pulse signals with the current value of 1uA, 7 reference pulse signals with the current value of 8uA, and 15 reference pulse signals with the current value of 64 uA.

It should be noted that in this implementation, the value of n should ensure that the refresh frequency of the reference pulse signal sequence is less than the maximum operating frequency of the TFT. In this implementation example, the total number n of reference pulse signals in the reference pulse signal sequence is 29, when the total number of times that the display panel refreshes a picture in a unit time is 60, that is, the refresh frequency of the display panel is 60Hz, and the total number 1920 of sub-pixels of the reference pulse signal sequence is provided by the same signal line, the refresh frequency of the reference pulse signal sequence is 60 × 1920 × 29 is 3.34MHz, which is less than the maximum operating frequency of the TFT, and thus, the reference pulse signal sequence in this implementation example can realize driving using the TFT.

Moreover, in order to ensure effective driving of the sub-pixels, it is necessary to ensure that the signal-to-noise ratio of the reference pulse signal is greater than the maximum current value of the reference pulse signal in the reference pulse signal sequence. In this implementation example, the maximum current value of the reference pulse signal is 64uA, and therefore, it is necessary to ensure that the signal-to-noise ratio of the reference pulse signal is greater than 64 dB. Meanwhile, in the implementation mode, even if the compensation needs to be performed on the display panel, since the total number of the current values in the reference pulse signal sequence is 3, the compensation only needs to be performed according to 3 compensation logics, and the complexity of the compensation is simplified.

In a fourth implementation, when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]The reference pulse signal sequence includes: (n21+1) reference pulse signals with current value of 1 current unit, and (n22+1) reference pulse signals with current value of 1 current unit

A reference pulse signal of current unit, n23 current values

The pulse width of the ith reference pulse signal in the (n21+1) reference pulse signals is 2^i-1The pulse width of the jth reference pulse signal in the (n22+1) reference pulse signals is 2^j-1The pulse width of the kth reference pulse signal in the n23 reference pulse signals is 2^k-1. Wherein n21, n22 and n23 are each an integer greater than or equal to 0, i, j and k are each a positive integer, and when n23 is a positive integer, n21, n22 and n23 satisfy:

when n23 is equal to 0, n21, and n22 satisfy:

i.e. n is an integer greater than or equal to 2.

For example, assuming that a current unit is 1uA, when n is 10, the rated gray scale range of the sub-pixel is [0,1023], and if n21 is 2, n22 is 2, and n23 is 4, please refer to the waveform diagram of the reference pulse signal sequence shown in fig. 10, which may include: 3 reference pulse signals with the current value of 1uA, 3 reference pulse signals with the current value of 8uA and 4 reference pulse signals with the current value of 64uA, wherein the pulse widths of the 3 reference pulse signals with the current value of 1uA are respectively 1, 2 and 4, the pulse widths of the 3 reference pulse signals with the current value of 8uA are respectively 1, 2 and 4, and the pulse widths of the 4 reference pulse signals with the current value of 64uA are respectively 1, 2, 4 and 8.

When the plurality of reference pulse signals are a plurality of reference pulse signals in any one of several reference pulse signal sequences provided by the embodiments of the present application, the reference gray scale ranges of the plurality of reference pulse signals include: the target value of any one of the plurality of reference pulse signals and the sum of the target values of at least two of the plurality of reference pulse signals. For example, when the reference pulse signals are the reference pulse signals shown in fig. 10, the reference gray scale ranges of the reference pulse signals include: a target value of any one of the ten reference pulse signals, a sum of target values of any two of the ten reference pulse signals, the sum of the target values of any three of the ten reference pulse signals, the sum of the target values of any four of the ten reference pulse signals, the sum of the target values of any five of the ten reference pulse signals, the sum of the target values of any six of the ten reference pulse signals, the sum of the target values of any seven of the ten reference pulse signals, the sum of the target values of any eight of the ten reference pulse signals, the sum of the target values of any nine of the ten reference pulse signals, and the sum of the target values of all the ten reference pulse signals.

In addition, in all of the four implementations of the reference pulse signal sequence signal, the one-unit width in the unit of the pulse width is taken as an example, and the size of the one-unit width is not limited. The size of the one unit width may be adjusted according to actual needs, for example, the one unit width may be 1 microsecond (μ s) or 5 μ s. Fig. 10 shows an example of one unit width of 5 μ s.

Step 603, providing Q target reference pulse signals to the sub-pixels, and driving the sub-pixels to display according to the target gray scale.

Since the sub-pixel includes a pixel circuit and a light emitting circuit connected to each other, when the pixel circuit is in a conducting state, the data signal can be transmitted to the light emitting circuit through the pixel circuit, and the reference pulse signal sequence includes a plurality of reference pulse signals arranged in sequence, the implementation process of step 603 may specifically include: and controlling the pixel circuit to be in a conducting state in a period of supplying any one target reference pulse signal to the light-emitting circuit so as to supply the any one target reference pulse signal to the light-emitting circuit through the signal source. Accordingly, the display driving method may further include: in a period in which the other pulse signal is supplied to the light-emitting circuit, the pixel circuit is controlled to be in an off state to stop supplying the other pulse signal to the light-emitting circuit. The other pulse signals are any one of the reference pulse signals except the Q target reference pulse signals.

And when the signal source provides the reference pulse signal sequence to the sub-pixels, a plurality of target reference pulse signals in the reference pulse signal sequence can be sequentially output according to the sequence from small to large of the current.

For example, assuming that the reference pulse signal sequence is the sequence exemplified in the foregoing fourth implementation manner, when the target gray scale is 6, according to step 602, the second and third reference pulse signals in the reference pulse signal sequence may be determined to be the target reference pulse signals, and therefore, in the process of supplying the reference pulse signal sequence to the sub-pixel, the pixel circuit may be controlled to be in the on state in the period of supplying the second and third reference pulse signals to the sub-pixel, respectively, and the pixel circuit may be controlled to be in the off state in the period of supplying the other reference pulse signals to the sub-pixel, so as to drive the sub-pixel to perform display according to the target gray scale 6.

For another example, assuming that the reference pulse signal sequence is the sequence exemplified in the foregoing fourth implementation manner, when the target gray scale is 605, according to step 602, it may be determined that the first, third, fourth, fifth, seventh and tenth reference pulse signals in the reference pulse signal sequence are the target reference pulse signals, and therefore, in the process of providing the reference pulse signal sequence to the sub-pixels by the signal source, the pixel circuits may be controlled to be in the on state in the periods in which the first, third, fourth, fifth, seventh and tenth reference pulse signals are provided to the sub-pixels, respectively, and in the periods in which other reference pulse signals are provided to the sub-pixels, the pixel circuits may be controlled to be in the off state, so as to drive the sub-pixels to display according to the target gray scale 605.

When the display driving method provided by the embodiment of the application is used for driving the mobile terminal, and the display panel in the mobile terminal is a Micro LED display panel, the size of the screen is 6 feet, the resolution of the screen is 1920 × 1080, each pixel unit comprises a red sub-pixel, a green sub-pixel and a blue sub-pixel, and each sub-pixel comprises an LED and a pixel circuit. The total number of pixel units in the display panel is 622.08 ten thousand, and the refresh frequency of the display panel, which is experimentally found to be 576 kilohertz (kHz) according to the experiment shown in fig. 4, is determined to satisfy the driving requirement and to be reduced to a greater extent than that of the related art.

In summary, in the display driving method provided in the embodiment of the present application, Q target reference pulse signals that need to be provided to the sub-pixel are determined among the plurality of reference pulse signals provided in the embodiment of the present application, the refresh frequency of the plurality of reference pulse signals is less than or equal to the rated operating frequency of the signal source, and the current values or pulse widths of at least two reference pulse signals in the plurality of reference pulse signals are not equal to each other. For example, the display driving method may be applied not only to an LCD display panel and an AMOLED display panel but also to a QLED display panel and a Micro LED display panel.

It should be noted that, the sequence of the steps of the display driving method provided in the embodiment of the present application can be appropriately adjusted, and the steps can also be increased or decreased according to the circumstances, and any method that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present application is included in the protection scope of the present application, and therefore, the details are not described again.

Fig. 11 is a flowchart of another display driving method provided in an embodiment of the present application, and as shown in fig. 11, the method may include the following steps:

step 1101, when the gray scale of the sub-pixel is the target gray scale, determining a target gray scale interval where the target gray scale is located, wherein the rated gray scale range of the sub-pixel comprises a plurality of gray scale intervals which are sequentially arranged, and each gray scale interval corresponds to a determined current value or a determined current value interval.

When the display panel is driven, the rated gray scale range of the sub-pixels can be divided into a plurality of gray scale intervals which are sequentially arranged in advance, and driving strategies are respectively formulated for different gray scale intervals according to the display requirements. Therefore, before determining to provide the reference pulse signals to the sub-pixels, it is necessary to determine a target gray scale interval in which the target gray scale is located, so as to determine the number and current values of the reference pulse signals provided to the sub-pixels according to the driving strategy of the target gray scale interval, where the reference pulse signals are used for driving the sub-pixels to display. The rated gray scale range of the sub-pixel is the gray scale range supported by the sub-pixel, and the target gray scale interval is one of a plurality of gray scale intervals in the rated gray scale range.

Step 1102, determining values of O of the O reference pulse signals and current values of the O reference pulse signals based on the current value or the current value interval corresponding to the target gray scale interval and the target gray scale, wherein O is a positive integer.

In the embodiment of the present application, the current values of the O reference pulse signals may be equal, and the pulse widths of the O reference pulse signals may be equal. And, for different gray scales, the pulse widths of the reference pulse signals for driving the sub-pixels to display the corresponding gray scale may also be equal. For example, the pulse widths of the O1 reference pulse signals for driving the sub-pixels to display the first gray scale and the O2 reference pulse signals for driving the sub-pixels to display the second gray scale may be equal.

In the following, the implementation of determining the current values of the O reference pulse signals is described, and optionally, the implementation of determining the current values of the O reference pulse signals according to different corresponding situations of the target gray scale interval and the current values may include the following two situations:

in the first case, when the target gray-scale interval corresponds to the current value, the current value of the O reference pulse signals is the current value corresponding to the target gray-scale interval;

for example, assuming that the target gray level is 210, the target gray level interval in which the target gray level is located is: (200, 400), the target gray scale interval (200, 400) corresponds to the current value 2uA, it can be determined that the current values of the O reference pulse signals for driving the sub-pixels to display according to the target gray scale 210 are all 2 uA.

In the second case, when the target gray scale section corresponds to the current value section, the current values of the O reference pulse signals are the current values corresponding to the target gray scale in the current value section. When the current value interval corresponds to the current value interval, one gray scale in the current value interval may correspond to one determined current value in the current value interval, and thus, when the current values of the O reference pulse signals are determined, one determined current value in the current value interval corresponding to the target gray scale may be determined as the current value of the O reference pulse signals.

For example, assuming that the target gray level is 210, the target gray level interval in which the target gray level is located is: [200,400], the target gray-scale interval [200,400] corresponds to a current value interval [2uA, 4uA ], and the gray-scale in the target gray-scale interval [200,400] corresponds to the current value in the current value interval [2uA, 4uA ] according to a direct proportional relationship, according to which: the current value corresponding to the target gray level 210 is 2.1uA, that is, the current values of the O reference pulse signals for driving the sub-pixels to display according to the target gray level 210 are all 2.1 uA.

An implementation manner of determining a value of O in the O reference pulse signals is described below, where the value of O may be determined according to current values of the O reference pulse signals, pulse widths of the O reference pulse signals, and a target gray level of the sub-pixel. In addition, in order to enrich the driving methods for driving the display panel, different driving methods may be adopted to drive the sub-pixels in the display panel in different driving processes. The different driving modes are embodied in that the change relation of the value of O along with the gray scale in the target gray scale interval is different. When the change relations are different, the implementation manner of determining the value of O is different, and the following two change relations are taken as examples to describe the implementation manner of determining the value of O:

in one implementation, the value of O varies linearly with the gray level in the target gray level interval, and the specific condition (e.g., variation speed) that the value of O varies linearly with the gray level in the target gray level interval can be determined according to actual needs.

At this time, the value of O may satisfy: the sum of the target values of the O reference pulse signals is equal to the target gray scale, and the target value of each reference pulse signal is the product of the current value of the corresponding reference pulse signal and the pulse width of the corresponding reference pulse signal. At this time, if the pulse widths of the O reference pulse signals are equal, and the pulse widths of the reference pulse signals for driving the sub-pixels to display the corresponding gray scale are also equal for different gray scales, the value of O, the pulse width S of the current value I, O of the O reference pulse signals, and the target gray scale G may satisfy: o ═ G/(ixs).

For example, assuming that the target gray level G is 210, the target gray level interval in which the target gray level is located is: the value of O varies linearly with the gray level in the target gray level interval [200,400], the pulse widths S of the O reference pulse signals are all 1, and the current values I of the O reference pulse signals are all 2.1uA, so that the value of O is 210/(2.1 × 1) 100.

In another implementation manner, the value of O varies nonlinearly with the gray scale in the target gray scale interval, and the specific situation (e.g., variation speed) that the value of O varies linearly with the gray scale in the target gray scale interval can be determined according to actual needs.

Alternatively, as shown by a curve a22 in fig. 13, the relationship that the value of O changes with the gray level in the target gray level interval may satisfy the function relationship of the increasing function which is convex downward. The function change condition of the functional relationship can be set according to actual needs, for example, the functional relationship can be a quadratic function or an exponential function.

In addition, in this implementation, in order to ensure the display effect of the display panel, the gamma value of the image displayed on the display panel needs to be adjusted in coordination to adjust the light and shade gradation of the image displayed on the display panel. The adjustment of the gamma value of the image on the display panel is an auxiliary means for adjusting the brightness and contrast of the image, and the image displayed on the display panel can be identical to the image desired to be displayed in an error range by adjusting the gamma value of the image on the display panel. And the specific adjustment mode of the image gamma value can be determined according to the function relation that the value of O changes along with the gray scale in the target gray scale interval.

It should be further noted that, when determining to display on the display panel, any implementation manner for determining the value of O in the O parameter pulse signals may be combined with any implementation manner for determining the current value of the O parameter pulse signals, and therefore, the implementation manner of step 1102 may include at least the following implementation manners:

in a first implementation manner, in a plurality of gray scale intervals included in a rated gray scale range of a sub-pixel, each gray scale interval corresponds to a determined current value, and a value of O linearly changes with a gray scale in a target gray scale interval, at this time, the current values of O reference pulse signals are current values corresponding to the target gray scale interval, and a value of O may be determined according to the current values of the O reference pulse signals, pulse widths of the O reference pulse signals, the linear change relationship, and the target gray scale.

For example, as shown in fig. 12, the rated gray scale range of the sub-pixel includes three gray scale sections arranged in sequence, each gray scale section corresponds to a determined current value, the current values corresponding to the plurality of gray scale sections are different, the current values corresponding to the three gray scale sections are B11, B12 and B13, respectively, and if the target gray scale section where the target gray scale is located is the gray scale section corresponding to the current value B12, the current value of the O reference pulse signals may be determined to be B12.

In each gray scale interval, the total number (value of O) of the reference pulse signals for driving the sub-pixels to display according to the gray scale in the corresponding gray scale interval changes linearly with the gray scale in the corresponding gray scale interval, as shown in fig. 12, the linear change relations corresponding to the three gray scale intervals are respectively the change situations shown by the solid line a11, the solid line a12 and the solid line a13, and if the target gray scale interval is the gray scale interval corresponding to the current value B12, the value of O can be determined according to the current value B12, the pulse width of the O reference pulse signals, the relational expression of the linear change relation shown by the solid line a12 and the target gray scale.

In a second implementation manner, in a plurality of gray scale intervals included in a rated gray scale range of a subpixel, each gray scale interval corresponds to a determined current value, and a relationship that a value of O changes with a gray scale in a target gray scale interval satisfies a function relationship of a downward convex increasing function, at this time, the current values of O reference pulse signals are current values corresponding to the target gray scale interval, and the value of O may be determined according to the current values of the O reference pulse signals, pulse widths of the O reference pulse signals, the function relationship, and a target gray scale.

For example, as shown in fig. 13, the rated gray scale range of the sub-pixel includes three gray scale sections arranged in sequence, each gray scale section corresponds to a determined current value, the current values corresponding to the plurality of gray scale sections are different, the current values corresponding to the three gray scale sections are B21, B22 and B23, respectively, and if the target gray scale section where the target gray scale is located is the gray scale section corresponding to the current value B22, the current value of the O reference pulse signals may be determined to be B22.

As shown in fig. 13, in the gray scale section corresponding to the current value B21, the total number (value of O) of the reference pulse signals for driving the sub-pixels to display the gray scale in the corresponding gray scale section linearly changes according to the gray scale in the gray scale section in the linear relationship shown by the solid line a 21. In the gray scale section corresponding to the current value B22, the total number (value of O) of reference pulse signals for driving the sub-pixels to display the gray scale in the corresponding gray scale section changes nonlinearly in accordance with the functional relationship of the increasing function shown by the solid line a 22. In the gray scale section corresponding to the current value B23, the relationship in which the total number (value of O) of the reference pulse signals for driving the sub-pixels to display the gray scale in the corresponding gray scale section changes with the gray scale in the gray scale section satisfies the non-linear change of the functional relationship of the increasing function having a downward convex shape shown by the solid line a 23. If the target gray scale interval is the gray scale interval corresponding to the current value B22, the value of O can be determined according to the current value B22, the pulse width of the O reference pulse signals, the relation of the functional relationship shown by the solid line a22, and the target gray scale.

It should be noted that, in the second implementation manner, in order to ensure that the display panel can display according to the target gray scale, the gamma value of the display panel needs to be adjusted in a matching manner during the driving process.

In addition, because the light-emitting wavelength of the display panel is nonlinearly changed along with the change of the driving current under the dual action of the polarization effect and the thermal effect of the LED, in the second implementation, because the relationship of the total number of the reference pulse signals for driving the sub-pixels to display changes along with the gray scale in the gray scale interval satisfies the function relationship of the increasing function which is convex downward, the nonlinear relationship of the total number changing along with the gray scale can be used for compensating the display brightness of the sub-pixels, and the difficulty of compensation can be simplified.

In a third implementation manner, in a plurality of gray scale intervals included in a rated gray scale range of a subpixel, a target gray scale interval corresponds to a current value interval, and a value of O linearly changes with a gray scale in the target gray scale interval, at this time, a current value of O reference pulse signals is a determined current value corresponding to the target gray scale in the current value interval, and the value of O may be determined according to the current values of the O reference pulse signals, pulse widths of the O reference pulse signals, the linear change relationship, and the target gray scale.

For example, as shown in fig. 14, the rated gray scale range of the sub-pixel includes three gray scale sections arranged in sequence, two gray scale sections of the three gray scale sections respectively correspond to a determined current value, the current values corresponding to the two gray scale sections are B31 and B32, and another gray scale section of the three gray scale sections corresponds to a current value section in which a solid line B33 is located, and each gray scale in the another gray scale section corresponds to one current value in a current value section in which the solid line B33 is located, and if a target gray scale section in which a target gray scale is located is the another gray scale section, and the target gray scale corresponds to a current value B331 in the current value section, the current value B331 may be determined as the current value of the O reference pulse signals.

In each gray scale interval, the total number of the reference pulse signals for driving the sub-pixels to display according to the gray scale in the corresponding gray scale interval varies linearly with the gray scale in the corresponding gray scale interval, as shown in fig. 14, the linear variation relations corresponding to the three gray scale intervals are respectively the variation situations shown by the solid line a31, the solid line a32 and the solid line a33, and if the target gray scale interval is the gray scale interval corresponding to the solid line B33, the value of O can be determined according to the current value B331, the pulse width of the O reference pulse signals, the relational expression of the linear variation relation shown by the solid line a33 and the target gray scale.

It should be noted that, in step 1102, when the implementation of determining the values of O in the O reference pulse signals and the current values of the O reference pulse signals is described, the pulse widths of the O reference pulse signals are equal, but since the pulse widths of the reference pulse signals are generally known, when the pulse widths of the O reference pulse signals are not equal, the values of O and the current values of the O reference pulse signals may also be determined according to the principle that the sum of the target values of the O reference pulse signals is equal to the target gray scale when the values of O in the O reference pulse signals and the current values of the O reference pulse signals are determined, which is not described herein again.

Step 1103, providing O reference pulse signals to the sub-pixels according to the value of O and the current values of the O reference pulse signals, and driving the sub-pixels to display according to the target gray scale.

The implementation manner of this step 1103 refers to the implementation manner of step 603.

To sum up, the display driving method provided in the embodiment of the present application, by setting different current corresponding conditions between the gray scale interval and the current value or between the gray scale interval and different value change conditions of the value of O along with the gray scale interval, can respectively determine the value of O in the O reference pulse signals and the current value of the O reference pulse signals according to the current corresponding condition and the value change condition corresponding to the target gray scale interval where the target gray scale is located, compared with the related art, realizes diversified driving of the display panel, and simplifies the difficulty in compensating the display brightness of the sub-pixel.

The following are embodiments of an apparatus of the present application that may be used to perform embodiments of the methods of the present application. For details which are not disclosed in the embodiments of the apparatus of the present application, reference is made to the embodiments of the method of the present application.

An embodiment of the present application provides a display driving apparatus, as shown in fig. 15, the display driving apparatus 1500 may include:

the obtaining module 1501 is configured to obtain a target gray scale of a sub-pixel in the display panel, where the target gray scale of the sub-pixel is a gray scale corresponding to the sub-pixel when the display panel displays a target image.

A determining module 1502 is configured to determine Q target reference pulse signals among the plurality of reference pulse signals based on the target gray scale of the sub-pixel, a sum of target values of the Q target reference pulse signals is equal to the target gray scale, a target value of each target reference pulse signal is a product of a current value of the corresponding target reference pulse signal and a pulse width of the corresponding target reference pulse signal, and Q is a positive integer.

The reference pulse signals are provided by a signal source, the refresh frequency of the reference pulse signals is less than or equal to the rated working frequency of the signal source, and the current values or the pulse widths of at least two of the reference pulse signals in the reference pulse signals are not equal.

And a driving module 1503, configured to provide Q target reference pulse signals to the sub-pixels, and drive the sub-pixels to display according to the target gray scale.

Optionally, the reference gray scale range of the plurality of reference pulse signals covers a nominal gray scale range of the sub-pixels.

Wherein, the rated gray scale range is the gray scale range supported by the sub-pixels, and the reference gray scale range comprises: and all positive integers which are greater than or equal to the minimum value of the target values corresponding to the plurality of reference pulse signals respectively and less than or equal to the sum of the target values corresponding to the plurality of reference pulse signals respectively.

is a pair of

The value of n satisfies the following conditions:

is a positive integer.

A reference pulse signal of current unit, n23 current values

The pulse width of the ith reference pulse signal in the (n21+1) reference pulse signals is 2^i-1The pulse width of the jth reference pulse signal in the (n22+1) reference pulse signals is 2^j-1The pulse width of the kth reference pulse signal in the (n23+1) reference pulse signals is 2^k-1。

when n23 is equal to 0, n21, and n22 satisfy:

optionally, the sub-pixel comprises: the pixel circuit and the light emitting circuit connected to each other, the driving module 1503, are specifically configured to: and controlling the pixel circuit to be in a conducting state during a period of supplying any one of the target reference pulse signals to the light emitting circuit so as to supply any one of the target reference pulse signals to the light emitting circuit.

Optionally, the driving module 1503 is further configured to: and controlling the pixel circuit to be in a closed state in a period of supplying other pulse signals to the light-emitting circuit so as to stop supplying the other pulse signals to the light-emitting circuit, wherein the other pulse signals are any one of the reference pulse signals except the Q target reference pulse signals.

In summary, in the display driving apparatus provided in the embodiment of the present application, the determining module determines Q target reference pulse signals that need to be provided to the sub-pixel in the plurality of reference pulse signals provided in the embodiment of the present application, where refresh frequencies of the plurality of reference pulse signals are less than or equal to a rated operating frequency of a signal source, and current values of at least two reference pulse signals in the plurality of reference pulse signals are not equal or pulse widths are not equal, compared with the related art, when the sub-pixel is driven to display, a total number of pulse signals included in driving signals provided to a light emitting device in the sub-pixel can be reduced, the refresh frequency is effectively reduced, and an application range of the display driving method is improved. For example, the display driving method may be applied not only to an LCD display panel and an AMOLED display panel but also to a QLED display panel and a Micro LED display panel.

It can be clearly understood by those skilled in the art that, for convenience and brevity of description, the specific working processes of the above-described apparatuses and modules may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.

An embodiment of the present application provides a display driving apparatus, and as shown in fig. 16, the display driving apparatus 1600 may include:

the first determining module 1601 is configured to determine a target gray scale interval where a target gray scale is located when a gray scale of a subpixel is the target gray scale, where a rated gray scale range of the subpixel includes a plurality of gray scale intervals arranged in sequence, and each gray scale interval corresponds to one determined current value or one determined current value interval, where the target gray scale interval is one of the plurality of gray scale intervals, and the rated gray scale range is a gray scale range supported by the subpixel.

A second determining module 1602, configured to determine values of O of the O reference pulse signals and current values of the O reference pulse signals based on the current value or the current value interval corresponding to the target gray scale interval and based on the target gray scale;

the current values of the O reference pulse signals are equal, the pulse widths of the O reference pulse signals are equal, and the current values of the O reference pulse signals are the current values corresponding to the target gray scale interval under the condition that the target gray scale interval corresponds to the current values; under the condition that the target gray scale interval corresponds to the current value interval, the current values of the O reference pulse signals are the current values corresponding to the target gray scale in the current value interval; and the value of O is determined according to the current values of the O reference pulse signals, the pulse widths of the O reference pulse signals and the target gray scale.

The driving module 1603 is configured to provide the O reference pulse signals to the sub-pixels according to the value of O and the current values of the O reference pulse signals, and drive the sub-pixels to display according to the target gray scale.

Optionally, the value of O varies linearly with the gray level in the target gray level interval.

Optionally, O satisfies: o/(ixs), where I is the current value of the O reference pulse signals, S is the pulse width of the O reference pulse signals, and G is the target gray scale.

Optionally, a relationship that a value of O changes with a gray level in the target gray level section satisfies a function relationship of an increasing function which is convex downward.

To sum up, the display driving device provided in the embodiment of the present application, by setting up the gray scale interval and the current value or the different current corresponding conditions of the current value interval, and the value of O changes with the different values of the gray scale interval, the second determining module can respectively determine the value of O and the current value of O reference pulse signals in the O reference pulse signals according to the current corresponding conditions and the value changing conditions corresponding to the target gray scale interval where the target gray scale is located.

The embodiment of the present application also provides a display driving apparatus 900, as shown in fig. 17, the display driving apparatus 900 includes a processor 910, a communication interface 920, a memory 930, and a driving integrated circuit (not shown in fig. 17). The processor 910, the communication interface 920, and the memory 930 are interconnected via a bus 940.

The bus 940 may be divided into an address bus, a data bus, a control bus, and the like. For ease of illustration, only one thick line is shown in FIG. 17, but this does not mean only one bus or one type of bus.

Memory 930 may include volatile memory (volatile memory), such as random-access memory (RAM); the memory 930 may also include a non-volatile memory (non-volatile memory), such as a flash memory (flash memory), a Hard Disk Drive (HDD) or a solid-state drive (SSD); the memory 930 may also comprise a combination of memories of the kind described above.

The memory 930 stores a correspondence relationship between gray scales and drive signals.

The processor 910 may be a hardware chip, and completes the functions of the display driving apparatus in the display driving method provided in the embodiment of the present application. The hardware chip may be an application-specific integrated circuit (ASIC), a Programmable Logic Device (PLD), or a combination thereof. The PLD may be a Complex Programmable Logic Device (CPLD), a field-programmable gate array (FPGA), a General Array Logic (GAL), or any combination thereof.

Processor 910 may also be a general-purpose processor, such as a Central Processing Unit (CPU), a Network Processor (NP), or a combination of a CPU and an NP. Accordingly, the memory 930 is further used for storing program instructions, and the processor 910 invokes the program instructions stored in the memory 930, so as to execute one or more steps in the display driving method provided by the embodiment of the present application, or in alternative embodiments, cause the driving integrated circuit to implement the display driving method provided by the embodiment of the present application.

The embodiment of the present application also provides a storage medium, which may be a non-volatile computer-readable storage medium, and when instructions in the storage medium are executed by a processor, the display driving method provided by the embodiment of the present application is implemented.

The embodiment of the present application further provides a computer program product containing instructions, which, when the computer program product runs on a computer, causes the computer to execute the display driving method provided by the embodiment of the present application.

The embodiment of the present application further provides a chip, where the chip includes a programmable logic circuit and/or a program instruction, and when the chip runs, the chip is used to implement the display driving method provided in the embodiment of the present application.

It will be understood by those skilled in the art that all or part of the steps for implementing the above embodiments may be implemented by hardware, or may be implemented by a program instructing relevant hardware, where the program may be stored in a computer-readable storage medium, and the above-mentioned storage medium may be a read-only memory, a magnetic disk or an optical disk, etc.

Claims

1. A display driving method, comprising:

acquiring a target gray scale of a sub-pixel in a display panel, wherein the target gray scale of the sub-pixel is a gray scale corresponding to the sub-pixel when the display panel displays a target image;

determining Q target reference pulse signals in a plurality of reference pulse signals based on the target gray scale of the sub-pixel, wherein the sum of target values of the Q target reference pulse signals is equal to the target gray scale, the target value of each target reference pulse signal is the product of the current value of the corresponding target reference pulse signal and the pulse width of the corresponding target reference pulse signal, and Q is a positive integer;

the reference pulse signals are provided by a signal source, the refresh frequency of the reference pulse signals is less than or equal to the rated working frequency of the signal source, the current values of at least two reference pulse signals in the reference pulse signals are not equal, and the pulse widths of at least two reference pulse signals in the reference pulse signals are not equal;

and providing the Q target reference pulse signals to the sub-pixels through data lines, and driving the sub-pixels to display according to the target gray scale.

2. The method according to claim 1, wherein the reference gray scale range of the plurality of reference pulse signals covers a nominal gray scale range of the sub-pixel;

wherein the rated gray scale range is a gray scale range supported by the sub-pixels, and the reference gray scale range includes: and all positive integers which are greater than or equal to the minimum value of the target values corresponding to the plurality of reference pulse signals respectively and less than or equal to the sum of the target values corresponding to the plurality of reference pulse signals respectively.

3. The method of claim 2, wherein when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals include: (n21+1) reference pulse signals with current value of 1 current unit, and (n22+1) reference pulse signals with current value of 1 current unit

Electric applianceReference pulse signal of current unit, n23 current values are

The pulse width of the ith reference pulse signal in the (n21+1) reference pulse signals is 2^i-1The pulse width of the jth reference pulse signal in the (n22+1) reference pulse signals is 2^j-1The pulse width of the kth reference pulse signal in the n23 reference pulse signals is 2^k-1；

Wherein each of the n21, the n22, and the n23 is an integer greater than or equal to 0, each of the i, the j, and the k is a positive integer, and when n23 is a positive integer, the n21, the n22, and the n23 satisfy:

when n23 is equal to 0, the n21, and the n22 satisfy:

。

4. the method according to any one of claims 1 to 3, wherein the sub-pixel comprises a pixel circuit and a light emitting circuit connected to each other, and the supplying of the Q target reference pulse signals to the sub-pixel specifically comprises:

and controlling the pixel circuit to be in a conducting state in a period of supplying any one target reference pulse signal to the light-emitting circuit so as to supply any one target reference pulse signal to the light-emitting circuit.

5. The method of claim 4, further comprising:

and controlling the pixel circuit to be in a closed state in a period of supplying other pulse signals to the light-emitting circuit so as to stop supplying the other pulse signals to the light-emitting circuit, wherein the other pulse signals are any one of the reference pulse signals except the Q target reference pulse signals.

6. A display driving method, comprising:

when the gray scale of a sub-pixel is a target gray scale, determining a target gray scale interval where the target gray scale is located, wherein the rated gray scale range of the sub-pixel comprises a plurality of gray scale intervals which are sequentially arranged, each gray scale interval corresponds to a determined current value or a determined current value interval, the target gray scale interval is one of the gray scale intervals, and the rated gray scale range is a gray scale range supported by the sub-pixel;

determining values of O in the O reference pulse signals and current values of the O reference pulse signals based on the current value or the current value interval corresponding to the target gray scale interval and the target gray scale, wherein O is a positive integer;

the current values of the O reference pulse signals are equal, the pulse widths of the O reference pulse signals are equal, and the current values of the O reference pulse signals are the current values corresponding to the target gray scale interval under the condition that the target gray scale interval corresponds to the current values; under the condition that the target gray scale interval corresponds to a current value interval, the current values of the O reference pulse signals are the current values corresponding to the target gray scale in the current value interval; the value of O is determined according to the current values of the O reference pulse signals, the pulse widths of the O reference pulse signals and the target gray scale;

and according to the value of the O and the current values of the O reference pulse signals, providing the O reference pulse signals to the sub-pixels through data lines, and driving the sub-pixels to display according to the target gray scale.

7. The method of claim 6, wherein the value of O varies linearly with gray level in the target gray level interval.

8. The method of claim 7, wherein O is selected from the group consisting of: o/(ixs), where I is a current value of the O reference pulse signals, S is a pulse width of the O reference pulse signals, and G is the target gray scale.

9. The method according to claim 6, wherein the relationship that the value of O changes with the gray level in the target gray level interval satisfies a function relationship of an increasing function which is convex downward.

10. A display driving apparatus, comprising:

the device comprises an acquisition module, a display module and a display module, wherein the acquisition module is used for acquiring a target gray scale of a sub-pixel in a display panel, and the target gray scale of the sub-pixel is a gray scale corresponding to the sub-pixel when the display panel displays a target image;

a determining module, configured to determine Q target reference pulse signals among a plurality of reference pulse signals based on a target gray scale of the sub-pixel, where a sum of target values of the Q target reference pulse signals is equal to the target gray scale, a target value of each target reference pulse signal is a product of a current value of a corresponding target reference pulse signal and a pulse width of the corresponding target reference pulse signal, and Q is a positive integer;

and the driving module is used for providing the Q target reference pulse signals for the sub-pixels through the data lines and driving the sub-pixels to display according to the target gray scale.

11. The apparatus according to claim 10, wherein the reference gray scale ranges of the plurality of reference pulse signals cover a nominal gray scale range of the sub-pixels;

12. The apparatus of claim 11, wherein when the rated gray scale range of the sub-pixel is [0,2 ]ⁿ-1]Then, the plurality of reference pulse signals include: (n21+1) reference pulse signals with current value of 1 current unit, and (n22+1) reference pulse signals with current value of 1 current unit

A reference pulse signal of current unit, n23 current values

The pulse width of the ith reference pulse signal in the (n21+1) reference pulse signals is 2^i-1The pulse width of the jth reference pulse signal in the (n22+1) reference pulse signals is 2^j-1The pulse width of the kth reference pulse signal in the (n23+1) reference pulse signals is 2^k-1；

when n23 is equal to 0, the n21, and the n22 satisfy:

。

13. the apparatus of any of claims 10 to 12, wherein the sub-pixels comprise: pixel circuit and luminescent circuit mutually connected, the drive module is used for specifically:

14. The apparatus of claim 13, wherein the drive module is further configured to:

15. A display driving apparatus, comprising:

the first determining module is used for determining a target gray scale interval where a target gray scale is located when the gray scale of a sub-pixel is the target gray scale, wherein the rated gray scale range of the sub-pixel comprises a plurality of gray scale intervals which are sequentially arranged, each gray scale interval corresponds to a determined current value or a determined current value interval, the target gray scale interval is one of the gray scale intervals, and the rated gray scale range is the gray scale range supported by the sub-pixel;

a second determining module, configured to determine values of O of the O reference pulse signals and current values of the O reference pulse signals based on a current value or a current value interval corresponding to the target gray scale interval and based on the target gray scale, where O is a positive integer;

and the driving module is used for providing the O reference pulse signals to the sub-pixels through data lines according to the value of the O and the current values of the O reference pulse signals and driving the sub-pixels to display according to the target gray scale.

16. The apparatus of claim 15, wherein the value of O varies linearly with gray level in the target gray level interval.

17. The apparatus of claim 16, wherein O satisfies: o/(ixs), where I is a current value of the O reference pulse signals, S is a pulse width of the O reference pulse signals, and G is the target gray scale.

18. The apparatus of claim 15, wherein the relationship between the value of O and the variation of the gray level in the target gray level interval satisfies a function relationship of an increasing function which is convex downward.

19. A display device, characterized in that the display device comprises: a display panel and a display driving device, wherein the display driving device is used for driving sub-pixels in the display panel to display according to corresponding gray scales when the display panel displays a target image, and the display driving device is the display driving device according to any one of claims 10 to 14 or the display driving device according to any one of claims 15 to 18.

20. The display device according to claim 19, wherein the display panel comprises a plurality of sub-pixels, and the plurality of sub-pixels are respectively supplied with the driving signals by a plurality of driving signal sources.

21. A display driving apparatus includes a processor, a memory, and a driving integrated circuit;

when the processor executes the computer program stored in the memory, the driving integrated circuit executes the display driving method according to any one of claims 1 to 5, or executes the display driving method according to any one of claims 6 to 10.

22. A storage medium, wherein instructions in the storage medium, when executed by a processor, implement a display driving method according to any one of claims 1 to 5, or implement a display driving method according to any one of claims 6 to 10.

23. A chip comprising programmable logic and/or program instructions for implementing a display driving method as claimed in any one of claims 1 to 5, or a display driving method as claimed in any one of claims 6 to 10, when said chip is in operation.