CN118506719A - Image display method, driving method and display device - Google Patents

Abstract

The present invention relates to the field of display technologies, and in particular, to an image display method, a driving method, and a display device. The image display method comprises the steps of obtaining m gray bit images of an image to be displayed; the bit duration of the ith gray level bit image is denoted as t _i; let the sum of bit time lengths of all gray bit images be T ₀ Let the driving voltage of the ith gray level bit image be v _i, then v ₁<v₂<…<v_i<…<v_m; dividing an image to be displayed of each frame into n subframes; at least 1 gray level bit image is configured for each subframe; and sequentially driving the gray bit images to be overlapped and displayed according to the driving voltage of the gray bit images configured in each subframe so as to form an image. With this arrangement, the image display effect can be improved.

Description

Image display method, driving method and display device

Technical Field

The present invention relates to the field of display technology, and in particular to an image display method, a driving method and a display device.

Background Art

With the rapid development of display technology, display devices such as LED displays and AMOLED displays are widely used in various electronic devices due to their advantages of low power consumption and low driving voltage. At present, digital driving methods or analog driving methods can be used to drive AMOLED display devices to display images.

When driving an AMOLED display using an analog method, the driving current varies due to the slight current variation between different pixels on the panel, which can easily cause obvious mura (uneven display). Driving AMOLED using a digital driving method can effectively suppress the mura phenomenon. However, when the existing digital driving method requires a high refresh rate, there are problems such as screen flickering, poor grayscale brightness display, and interference between adjacent pixels, which lead to poor image display.

Summary of the invention

In order to solve the above-mentioned problem of poor image display in the prior art, the present invention provides an image display method, a driving method and a display device.

In a first aspect, the present invention provides an image display method, comprising:

Obtain m grayscale bit images of an image to be displayed, where m is a positive integer greater than or equal to 2; each grayscale bit image is configured with a bit duration and a driving voltage; all grayscale bit images are arranged from small to large according to grayscale values, and the bit duration of the i-th grayscale bit image is represented as _ti , i∈[1,m]; let the sum of the bit durations of all grayscale bit images be _T0 , then Assuming that the driving voltage of the i-th grayscale bit image is denoted as _vi , then _v1 < _v2 <…< _vi <…<_vm;

Divide each frame of the image to be displayed into n subframes, where n is a positive integer greater than or equal to 1 and less than or equal to m; each subframe is configured with at least one grayscale bit image;

According to the order of the grayscale bit images arranged in the above-mentioned sub-frames, the grayscale bit images are sequentially driven according to the driving voltages set for the grayscale bit images to be superimposed and displayed to form an image.

In one embodiment, the driving voltage v _m is a voltage value when the mth grayscale bit image is fully bright.

In one embodiment, the ratio of the driving voltage _vi of the i-th grayscale bit image to the driving voltage vi ₊₁ of the i+1-th grayscale bit image is between between.

In one embodiment, the number of gray-scale bit images allocated to each sub-frame is the same.

In one embodiment, m is 8 and n is 4.

In one embodiment, the grayscale bit image is displayed by emitting light from an LED lamp; the LED lamp that at least partially controls the display of the grayscale bit image is connected in parallel with a variable resistor, and the voltage of the LED lamp is changed by adjusting the resistance value of the variable resistor, thereby controlling the LED lamp to display the grayscale bit image according to the preset driving voltage.

In a second aspect, the present invention further provides a driving method, applied to a display device, comprising:

receiving an image to be displayed;

Generate m grayscale bit images from the image to be displayed, where m is a positive integer greater than or equal to 2; each grayscale bit image is configured with a bit duration and a driving voltage; all grayscale bit images are arranged from small to large according to grayscale values, and the bit duration of the i-th grayscale bit image is represented as _ti , i∈[1,m]; let the sum of the bit durations of all grayscale bit images be _T0 , then Assuming that the driving voltage of the i-th grayscale bit image is denoted as _vi , then _v1 < _v2 <…< _vi <…<_vm;

Divide each frame of the image to be displayed into n subframes, where n is a positive integer greater than or equal to 1 and less than or equal to m; each subframe is configured with at least one grayscale bit image;

According to the order of the grayscale bit images arranged in the above-mentioned sub-frames, the grayscale bit images are sequentially driven according to the driving voltages set for the grayscale bit images to be superimposed and displayed to form an image.

In one embodiment, a subframe unit is formed by taking x*y pixels on the display device as a unit to drive n subframes in the order of the configured grayscale bit images, wherein x and y are both even numbers greater than or equal to 2.

In a third aspect, the present invention further provides a display device, which adopts the image display method described in any embodiment of the first aspect or the driving method described in any embodiment of the second aspect.

Based on the above, compared with the prior art, the image display method provided by the present invention avoids the problem of uncomfortable screen flickering and poor grayscale brightness display caused by fast screen refresh rate by adjusting the grayscale bit image display time and the timing integration change of the driving voltage, thereby improving the image display effect.

Other features and beneficial effects of the present invention will be described in the following description, and partly become apparent from the description, or understood by practicing the present invention. The purpose and other beneficial effects of the present invention can be realized and obtained by the structures particularly pointed out in the description, claims and drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work. The positional relationships described in the drawings in the following description are based on the directions in which the components are drawn in the diagrams, unless otherwise specified.

FIG1 is a schematic diagram of 8 grayscale bit images being superimposed and displayed to form a grayscale image to be displayed;

FIG. 2 is a schematic diagram of an eight-bit grayscale image displayed sequentially in the prior art;

FIG3 is a flowchart of the steps of an image display method provided by an embodiment of the present invention;

FIG4 is a schematic diagram showing the relationship between the image bit duration of each grayscale bit and the driving voltage provided by an embodiment of the present invention;

FIG5 is a schematic diagram of a circuit in which an LED lamp and a variable resistor are connected in parallel to control grayscale bit image display according to an embodiment of the present invention;

FIG6 is a schematic diagram showing the distribution of grayscale bit image configurations in each subframe according to an embodiment of the present invention;

7 is a schematic diagram of a display sequence of grayscale bit images in a subframe unit provided by an embodiment of the present invention;

FIG. 8 is a flowchart of a driving method according to an embodiment of the present invention.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all the embodiments; the technical features designed in different implementation modes of the present invention described below can be combined with each other as long as they do not conflict with each other; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

In the description of the present invention, it should be noted that all terms used in the present invention (including technical terms and scientific terms) have the same meanings as those generally understood by ordinary technicians in the field to which the present invention belongs, and should not be understood as limitations on the present invention; it should be further understood that the terms used in the present invention should be understood to have the same meanings as these terms in the context of this specification and in the relevant fields, and should not be understood in an idealized or overly formal sense, unless explicitly defined in this invention.

As shown in FIG. 1 and FIG. 2, FIG. 1 is a schematic diagram of 8 grayscale bit images superimposed and displayed to form a grayscale image to be displayed, and FIG. 2 is a schematic diagram of 8 grayscale bit images displayed in sequence according to grayscale values in the prior art. In FIG. 1, the 8 grayscale bit images are arranged from small to large according to grayscale values, and are respectively represented as the first grayscale bit image b0, the second grayscale bit image b1, the third grayscale bit image b2, the fourth grayscale bit image b3, the fifth grayscale bit image b4, the sixth grayscale bit image b5, the seventh grayscale bit image b6, and the eighth grayscale bit image b7. Specifically, a bit plane image is a binary image, and each pixel in the image has only one bit, which can only be represented as 0 or 1, where 0 represents dark and 1 represents bright. Therefore, a bit plane image can be displayed by superimposing multiple grayscale bit images represented by 0 or 1 to form a complete grayscale image to be displayed. The existing digital driving method is to superimpose the numbers on the grayscale bit images in Figure 1 in accordance with the corresponding duration and fixed driving voltage in Figure 2 to form a complete image. The above existing digital driving method will cause mutual interference due to the different data signals between two adjacent frames of pixels, and will cause image flickering and discomfort, resulting in poor display effects. Especially when the picture update rate is high, it is easy to have the problem of poor grayscale brightness display.

To solve at least one of the above problems, the present invention provides an image display method, a driving method and a display device, which improve the problem of flicker discomfort and mutual interference between adjacent pixels by changing the grayscale bit image display time and the timing integration of the driving voltage, especially when the picture update rate is high, the problem of poor grayscale brightness display can be improved. The following is a detailed description with reference to specific embodiments and drawings.

Embodiment 1

Referring to FIG. 3 , an embodiment of the present invention provides an image display method, comprising the following steps:

Step S10, obtaining m grayscale bit images of the image to be displayed, where m is a positive integer greater than or equal to 2; each grayscale bit image is configured with a bit duration and a driving voltage; all grayscale bit images are arranged from small to large according to grayscale values, and the bit duration of the i-th grayscale bit image is represented by _ti , i∈[1,m]; assuming that the sum of the bit durations of all grayscale bit images is _T0 , then Assuming that the driving voltage of the i-th grayscale bit image is denoted as _vi , then v ₁ <v ₂ <…< _vi <…<v _m .

Specifically, the number of grayscale bit images can be selected according to the requirements of the functional processing module inside the actual display. For example, 6 grayscale bit images composed of 6-bit driving display, 8 grayscale bit images composed of 8-bit driving display, or 10 grayscale bit images composed of 10-bit driving display can be used, and no limitation is made here. Please refer to FIG. 4. In this embodiment, it is preferred that the image to be displayed is an 8-bit grayscale bit image composed of 8 bits.

On this basis, the bit duration of each grayscale bit image is set equal to avoid the inconsistent display time of the grayscale bit image in each subframe, which will cause the time of each frame image to be prolonged after accumulation, thereby affecting the grayscale display effect. That is, assuming that the sum of the bit durations of all grayscale bit images is T ₀ , The specific value of T ₀ is set according to the actual display duration of each frame of the image, and is not limited here. For example, FIG. 4 shows that the bit durations corresponding to the 8 grayscale bit images are equal.

Further, the driving voltage of each grayscale bit image gradually increases according to the grayscale value sorting of the grayscale bit image, that is, assuming that the driving voltage of the i-th grayscale bit image is represented as _vi , then _v1 < _v2 <…< _vi <…<_vm; the specific driving voltage value is set according to actual needs and is not limited here. For example, FIG4 shows that 8 grayscale bit images are sorted according to the grayscale value of the grayscale bit image, and the corresponding driving voltages gradually increase.

In a preferred embodiment, the driving voltage v _m is the voltage value when the mth grayscale bit image is fully bright; that is, all grayscale bit images are arranged from small to large according to the grayscale value, and the driving voltage v _m of the last grayscale bit image should be the voltage value when the image is fully bright, and the driving voltages of other grayscale bit images are less than the voltage value when the image is fully bright.

Preferably, the ratio of the driving voltage _vi of the i-th grayscale bit image to the driving voltage vi+ _{1 of the i+} 1-th grayscale bit image is between That is, all grayscale bit images are arranged from small to large according to grayscale values, and the driving voltage of the previous grayscale bit image is the driving voltage of the next grayscale bit image. times to improve the picture display effect and avoid the display of grayscale brightness affected by too high or too low driving voltage.

More preferably, the ratio of the driving voltages of the plurality of grayscale bit images from small to large can be a geometric progression with the first term being 1 and the common ratio being 2, for example, the driving voltage ratios of the 8 grayscale bit images are 1:2:4:8:16:32:64:128. Of course, those skilled in the art can also design other ratios according to actual needs.

In other optional embodiments, as shown in FIG5 , the grayscale bit image is displayed by emitting light through an LED lamp; the LED lamp that at least partially controls the display of the grayscale bit image is connected in parallel with a variable resistor, and the voltage of the LED lamp is changed by adjusting the resistance value of the variable resistor, thereby controlling the LED lamp to display the grayscale bit image according to the preset driving voltage. That is, the driving voltage is changed by connecting a variable resistor in parallel to the LED lamp, so that the driving voltage in each subframe changes with the grayscale bit image.

Of course, according to the concept of the present invention, those skilled in the art may also adjust the driving voltage by adopting other reasonable methods, such as adjusting the driving voltage by changing the input voltage (such as adjusting the PWM signal) while keeping the resistance unchanged.

Meanwhile, please continue to refer to FIG. 3 , in step S10 , it further includes: dividing each frame of the image to be displayed into n subframes, where n is a positive integer greater than or equal to 1 and less than or equal to m; and each subframe is configured with at least one grayscale bit image.

In specific implementation, the number of divided subframes should be determined according to the number of grayscale bit images, that is, to ensure that n≤m, each subframe is configured with at least one grayscale bit image. For example, m is 8, and the value range of n can be 1 to 8, which is not limited here. In order to further ensure the image display quality, it is preferred that n<m, for example, m is 8 and n is 4.

In addition, each subframe is configured with a light-emitting duration, and the light-emitting duration of the j-th subframe is represented as T _j ; wherein, So that each grayscale bit image can be displayed in each subframe. In the same cycle, the luminous duration of each subframe can be the same or different. That is, the luminous duration of the subframe can be as short as Only one grayscale bit image is placed, or a larger value can be taken to place multiple grayscale bit images, which is set according to actual needs. In this embodiment, the luminous duration of the subframes is preferably equal, that is, the number of grayscale bit images configured in each subframe is the same, so that the luminous duration of each subframe is close, thereby achieving a better image display effect.

Specifically, T _j can be taken as the closest The multiple value is used as the luminous duration of the subframe, and the luminous duration of each subframe can be exactly the same or different. The specific parameters can be fine-tuned according to the actual requirements of the overall picture, or the bit duration can be fine-tuned by using gamma2.2, etc., which is not limited here. For example, please refer to Figure 6. In a standard 8-grayscale bit image, if n is 4, each subframe is configured with 2 grayscale bit images, and the luminous duration of each subframe is Through this limitation, the luminous duration of each subframe can be made the same, and the display of the grayscale bit image in each subframe fully occupies the luminous duration of the entire subframe, thereby avoiding the problem of image flickering.

After determining the number of grayscale bit images to be placed in each subframe and the duration of light emission, m grayscale bit images are placed in each subframe according to requirements. How to combine the grayscale bit images into specific subframes can be designed according to requirements and is not limited here.

Step S20, according to the order of the grayscale bit images configured in the above subframes, the grayscale bit images are sequentially driven according to the driving voltages set for each grayscale bit image to be superimposed and displayed to form an image. Specifically, common drivers and driving circuits can be used to realize superimposed display, which will not be described in detail here.

The image display method of the above embodiment can ensure that adjacent subframes output different grayscale bit image sequences by changing the image bit duration, driving voltage and subframe timing integration, thereby effectively eliminating the mutual interference between adjacent pixels and the problem of screen flickering, improving the image display quality and optimizing the display effect.

In particular, when the screen refresh rate is required to be fast, if the grayscale bit images are displayed sequentially from short to long in the prior art with a fixed driving voltage and the method shown in FIG. 2, due to the fast screen refresh rate and fast switching speed, the grayscale brightness of some grayscale bit images is not displayed well, and the brightness of the grayscale bit images cannot be accurately met. Therefore, the embodiment of the present invention adjusts the display time and driving voltage of each grayscale image so that when the screen refresh rate is fast, the bit time of each grayscale bit image is consistent, so as to avoid the grayscale bit image with a shorter bit time being displayed before reaching the preset driving voltage in the prior art as shown in FIG. 2; that is, to avoid the grayscale bit image with a shorter bit time resulting in too low grayscale brightness due to not reaching the preset driving voltage, and thus the grayscale brightness of each grayscale bit image cannot be accurately displayed; this embodiment uses the same bit time and the driving voltage changes with the grayscale bit image to make each grayscale bit image have enough bit time to reach the required driving voltage, thereby effectively improving the grayscale brightness display effect.

In order to better illustrate the image display method provided by the above embodiment of the present invention, a detailed description is given below by taking m as 8 and n as 4 as an example.

Specifically, referring to FIG. 6 and FIG. 7, the eight grayscale bit images are dispersed in the four subframes: the eighth grayscale bit image b7 and the first grayscale bit image b0 are in one subframe; the seventh grayscale bit image b6 and the second grayscale bit image b2 are in one subframe; the sixth grayscale bit image b5 and the third grayscale bit image b2 are in one subframe; the fifth grayscale bit image b4 and the fourth grayscale bit image b3 are in one subframe. This setting can effectively avoid the problem of interference between adjacent pixels, making the image display effect better. After the above four subframes are superimposed, a complete image can be formed.

Further, as shown in FIG7 , a subframe unit is formed by taking 4*4 pixels on the display device as a unit, and is driven in a subframe sequence, wherein the display of the subframe in each pixel in each cycle time does not appear repeatedly, thereby obtaining n frame images formed by the superposition of n subframes. FIG7 shows the display sequence of each grayscale bit image in the 4*4 pixels of the same subframe unit. For example, in the first pixel of the first row, the first frame image displays b6 and b1 of the second subframe, the second frame image displays b5 and b4 of the third subframe, the third frame image displays b7 and b0 of the first subframe, and the fourth frame image displays b4 and b3 of the fourth subframe; in the second pixel of the first row, the first frame image displays b5 and b2 of the third subframe, the second frame image displays b6 and b1 of the second subframe, the third frame image displays b4 and b3 of the fourth subframe, and the fourth frame image displays b7 and b0 of the first subframe...; and so on, the superimposed display of four frame images consisting of 8 grayscale bit images in 16 pixels can be completed.

It should be noted that the present embodiment is not limited to the grayscale bit image distribution of the first to sixth subframes and the display order of the first to sixth frames shown in FIGS. 6 and 7 . Those skilled in the art may change the display order of the frames and the distribution position of the grayscale bit images according to actual needs, which all fall within the protection scope of the present invention.

Embodiment 2

Referring to FIG. 8 , an embodiment of the present invention provides a driving method, which is applied to a display device and includes the following steps:

Step S100, receiving an image to be displayed;

Step S200, generate m grayscale bit images from the image to be displayed, where m is a positive integer greater than or equal to 2; each grayscale bit image is configured with a bit duration and a driving voltage; all grayscale bit images are arranged from small to large according to grayscale values, and the bit duration of the i-th grayscale bit image is represented by _ti , i∈[1,m]; assuming that the sum of the bit durations of all grayscale bit images is _T0 , then Assuming that the driving voltage of the i-th grayscale bit image is represented as v _i , then v ₁ <v ₂ <…< _i <…<_m; dividing each frame of the image to be displayed into n subframes, where n is a positive integer greater than or equal to 1 and less than or equal to m; each subframe is configured with at least one grayscale bit image;

In step S300 , according to the order of the grayscale bit images configured in the above-mentioned sub-frames, the grayscale bit images are sequentially driven according to the driving voltages set for the grayscale bit images to be superimposed and displayed to form an image.

Preferably, the bit duration allocated to each grayscale bit image is corrected by a gamma correction coefficient, such as gamma 2.2.

Furthermore, a subframe unit is formed with x*y pixels on the display device as a unit, and n subframes are driven in the order of the configured grayscale bit images, wherein x and y are both even numbers greater than or equal to 2. By reducing the number of pixels in the subframe unit as mentioned above, the problem of exceeding the vertical synchronization time due to the overlay time of each unit being too long can be effectively avoided. At the same time, the number of image processing pixels can be better handled, further ensuring the picture display quality.

For example, as shown in FIG. 7 , in 4 sub-frames, 4*4 pixels are used as a unit to form a sub-frame unit, and the 4 sub-frames are driven in sequence, wherein the display of the sub-frame in each pixel does not appear repeatedly within a cycle time.

In addition, the specific role, function and implementation method of each step can refer to the content of Example 1 and will not be elaborated here.

Embodiment 3

An embodiment of the present invention further provides a driving device, the driving device comprising:

A receiving module, used for receiving an image to be displayed;

The image processing module generates m grayscale bit images from the image to be displayed, where m is a positive integer greater than or equal to 2; each grayscale bit image is configured with a bit duration and a driving voltage; all grayscale bit images are arranged from small to large according to grayscale values, and the bit duration of the i-th grayscale bit image is represented by _ti , i∈[1,m]; assuming that the sum of the bit durations of all grayscale bit images is _T0 , then Assuming that the driving voltage of the i-th grayscale bit image is represented as _vi , then _v1 <v2<…< _vi <…<_vm; dividing each frame of the image to be displayed into n subframes, n is a positive integer greater than or equal to 1 and less than or equal to m; each subframe is configured with at least one grayscale bit image;

The control module drives the grayscale bit images in sequence according to the order of the grayscale bit images configured in the sub-frames and the driving voltages set for the grayscale bit images to form an image by superimposing and displaying the grayscale bit images.

The specific role, function and implementation of each module can also refer to the content of Example 1, and will not be elaborated here.

Embodiment 4

An embodiment of the present invention further provides a display device, which adopts the image display method described in any of the above embodiments or the driving method described in any of the above embodiments to effectively improve the display performance of the image.

The display device includes but is not limited to an organic light-emitting diode (OLED) display panel, an active-matrix organic light emitting diode (AMOLED) display panel, a mini-LED display panel, and a micro-LED display panel.

Embodiment 5

An embodiment of the present invention further provides a computer storage medium, wherein the computer storage medium stores computer executable instructions, and when the computer executable instructions are executed by one or more processors, the image display method described in the above embodiment 1 or the driving method described in the above embodiment 2 is implemented.

In a specific implementation, the computer-readable storage medium is a magnetic disk, an optical disk, a read-only memory (ROM), a random access memory (RAM), a flash memory (Flash Memory), a hard disk (Hard Disk Drive, abbreviated as: HDD) or a solid-state drive (SSD), etc.; the computer-readable storage medium may also include a combination of the above-mentioned types of memory.

Embodiment 6

An embodiment of the present invention further provides a display device, comprising a processor, a memory, and computer executable instructions stored in the memory, wherein the computer executable instructions, when executed by the processor, implement the image display method described in the above embodiment 1 or implement the driving method described in the above embodiment 2.

In specific implementation, the number of processors may be one or more, and the processor may be a central processing unit (CPU). The processor may also be other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA) or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components and other chips, or a combination of the above-mentioned chips. The general-purpose processor may be a microprocessor or the processor may also be any conventional processor, etc.

The memory and the processor can be communicatively connected via a bus or other means. The memory stores instructions that can be executed by at least one processor. The instructions are executed by at least one processor so that the processor executes the image display method described in the above embodiment 1 or implements the driving method described in the above embodiment 2.

In summary, compared with the prior art, the image display method, driving method and display device provided by the present invention avoid interference between adjacent pixels and uncomfortable screen flickering by adjusting the bit duration, driving voltage, display order and timing integration changes of the grayscale bit image, and can also avoid the problem of poor grayscale brightness display when the screen refresh rate is fast, effectively improving the image display effect, thereby optimizing the display performance.

In addition, those skilled in the art should understand that, although there are many problems in the prior art, each embodiment or technical solution of the present invention can be improved in only one or several aspects, without having to solve all the technical problems listed in the prior art or background technology at the same time. Those skilled in the art should understand that the content not mentioned in a claim should not be used as a limitation on the claim.

Although the terms such as grayscale bit image, bit duration, subframe, luminous duration, subframe unit, etc. are used more frequently in this article, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; interpreting them as any additional restrictions is contrary to the spirit of the present invention; the terms "first", "second", etc. (if any) in the description and claims of the embodiments of the present invention and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the present invention.

Claims (10)

1. An image display method, comprising:

Obtaining m gray bit images of an image to be displayed, wherein m is a positive integer greater than or equal to 2; each gray level bit image is configured with a bit duration and a driving voltage; all gray level bit images are arranged from small to large according to gray level values, and the bit duration of the ith gray level bit image is expressed as t _i, i is E [1, m ]; let the sum of bit time lengths of all gray bit images be T ₀ Let the driving voltage of the ith gray-scale bit image be v _i, then v ₁<v₂<…<v_i<…<v_m;

Dividing each frame of image to be displayed into n subframes, wherein n is a positive integer which is more than or equal to 1 and less than or equal to m; each subframe is configured with at least 1 gray level bit image;

And sequentially driving the gray bit images to be overlapped and displayed according to the driving voltage set by each gray bit image according to the sequence of the gray bit images configured in each subframe so as to form an image.

2. The image display method according to claim 1, wherein: the driving voltage v _m is the voltage value when the mth gray-scale bit image is fully bright.

3. The image display method according to claim 1, wherein: the ratio of the driving voltage v _i of the ith gray-scale bit image to the driving voltage v _i+1 of the (i+1) th gray-scale bit image is betweenBetween them.

4. The image display method according to claim 1, wherein: the number of gray bit images allocated per subframe is the same.

5. The image display method according to claim 1, wherein: each subframe is configured with a luminous duration, and the luminous duration of the jth subframe is represented as T _j; wherein,

6. The image display method according to claim 1, wherein: m is 8 and n is 4.

7. The image display method according to claim 1, wherein: the gray bit image is displayed through light emitting of an LED lamp; the LED lamp which at least partially controls the gray-scale bit image display is connected with a variable resistor in parallel, and the voltage of the LED lamp is changed by adjusting the resistance value of the variable resistor, so that the LED lamp is controlled to display the gray-scale bit image according to the preset driving voltage.

8. A driving method applied to a display device, comprising:

receiving an image to be displayed;

Generating m gray bit images of an image to be displayed, wherein m is a positive integer greater than or equal to 2; each gray level bit image is configured with a bit duration and a driving voltage; all gray level bit images are arranged from small to large according to gray level values, and the bit duration of the ith gray level bit image is expressed as t _i, i is E [1, m ]; let the sum of bit time lengths of all gray bit images be T ₀ Let the driving voltage of the ith gray-scale bit image be v _i, then v ₁<v₂<…<v_i<…<v_m;

Dividing each frame of image to be displayed into n subframes, wherein n is a positive integer which is more than or equal to 1 and less than or equal to m; each subframe is configured with at least 1 gray level bit image;

And sequentially driving the gray bit images to be overlapped and displayed according to the driving voltage set by each gray bit image according to the sequence of the gray bit images configured in each subframe so as to form an image.

9. The driving method according to claim 8, characterized in that: and driving the n subframes according to the sequence of the configured gray level bit images by taking x y pixels on the display device as a unit to form a subframe unit, wherein x and y are both even numbers greater than or equal to 2.

10. A display device, characterized in that: an image display method according to any one of claims 1 to 7, or a driving method according to claim 8 or 9.